// SPDX-License-Identifier: BSD-2-Clause /* * Copyright (c) 2014, STMicroelectronics International N.V. * Copyright (c) 2020, 2022 Linaro Limited * Copyright (c) 2022, Technology Innovation Institute (TII) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(CFG_CRYPTO_HKDF) #include #endif #if defined(CFG_CRYPTO_CONCAT_KDF) #include #endif #if defined(CFG_CRYPTO_PBKDF2) #include #endif enum cryp_state { CRYP_STATE_INITIALIZED = 0, CRYP_STATE_UNINITIALIZED }; typedef void (*tee_cryp_ctx_finalize_func_t) (void *ctx); struct tee_cryp_state { TAILQ_ENTRY(tee_cryp_state) link; uint32_t algo; uint32_t mode; vaddr_t key1; vaddr_t key2; void *ctx; tee_cryp_ctx_finalize_func_t ctx_finalize; enum cryp_state state; }; struct tee_cryp_obj_secret { uint32_t key_size; uint32_t alloc_size; /* * Pseudo code visualize layout of structure * Next follows data, such as: * uint8_t data[alloc_size] * key_size must never exceed alloc_size */ }; #define TEE_TYPE_ATTR_OPTIONAL BIT(0) #define TEE_TYPE_ATTR_REQUIRED BIT(1) #define TEE_TYPE_ATTR_OPTIONAL_GROUP BIT(2) #define TEE_TYPE_ATTR_SIZE_INDICATOR BIT(3) #define TEE_TYPE_ATTR_GEN_KEY_OPT BIT(4) #define TEE_TYPE_ATTR_GEN_KEY_REQ BIT(5) #define TEE_TYPE_ATTR_BIGNUM_MAXBITS BIT(6) /* Handle storing of generic secret keys of varying lengths */ #define ATTR_OPS_INDEX_SECRET 0 /* Convert to/from big-endian byte array and provider-specific bignum */ #define ATTR_OPS_INDEX_BIGNUM 1 /* Convert to/from value attribute depending on direction */ #define ATTR_OPS_INDEX_VALUE 2 /* Convert to/from curve25519 attribute depending on direction */ #define ATTR_OPS_INDEX_25519 3 /* Curve25519 key bytes size is always 32 bytes*/ #define KEY_SIZE_BYTES_25519 UL(32) /* TEE Internal Core API v1.3.1, Table 6-8 */ #define TEE_ED25519_CTX_MAX_LENGTH 255 struct tee_cryp_obj_type_attrs { uint32_t attr_id; uint16_t flags; uint16_t ops_index; uint16_t raw_offs; uint16_t raw_size; }; #define RAW_DATA(_x, _y) \ .raw_offs = offsetof(_x, _y), .raw_size = MEMBER_SIZE(_x, _y) static const struct tee_cryp_obj_type_attrs tee_cryp_obj_secret_value_attrs[] = { { .attr_id = TEE_ATTR_SECRET_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, .ops_index = ATTR_OPS_INDEX_SECRET, .raw_offs = 0, .raw_size = 0 }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_rsa_pub_key_attrs[] = { { .attr_id = TEE_ATTR_RSA_MODULUS, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct rsa_public_key, n) }, { .attr_id = TEE_ATTR_RSA_PUBLIC_EXPONENT, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct rsa_public_key, e) }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_rsa_keypair_attrs[] = { { .attr_id = TEE_ATTR_RSA_MODULUS, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct rsa_keypair, n) }, { .attr_id = TEE_ATTR_RSA_PUBLIC_EXPONENT, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_OPT, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct rsa_keypair, e) }, { .attr_id = TEE_ATTR_RSA_PRIVATE_EXPONENT, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct rsa_keypair, d) }, { .attr_id = TEE_ATTR_RSA_PRIME1, .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct rsa_keypair, p) }, { .attr_id = TEE_ATTR_RSA_PRIME2, .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct rsa_keypair, q) }, { .attr_id = TEE_ATTR_RSA_EXPONENT1, .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct rsa_keypair, dp) }, { .attr_id = TEE_ATTR_RSA_EXPONENT2, .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct rsa_keypair, dq) }, { .attr_id = TEE_ATTR_RSA_COEFFICIENT, .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct rsa_keypair, qp) }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dsa_pub_key_attrs[] = { { .attr_id = TEE_ATTR_DSA_PRIME, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS | TEE_TYPE_ATTR_SIZE_INDICATOR, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dsa_public_key, p) }, { .attr_id = TEE_ATTR_DSA_SUBPRIME, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dsa_public_key, q) }, { .attr_id = TEE_ATTR_DSA_BASE, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dsa_public_key, g) }, { .attr_id = TEE_ATTR_DSA_PUBLIC_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dsa_public_key, y) }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dsa_keypair_attrs[] = { { .attr_id = TEE_ATTR_DSA_PRIME, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ | TEE_TYPE_ATTR_BIGNUM_MAXBITS | TEE_TYPE_ATTR_SIZE_INDICATOR, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dsa_keypair, p) }, { .attr_id = TEE_ATTR_DSA_SUBPRIME, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dsa_keypair, q) }, { .attr_id = TEE_ATTR_DSA_BASE, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ | TEE_TYPE_ATTR_BIGNUM_MAXBITS, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dsa_keypair, g) }, { .attr_id = TEE_ATTR_DSA_PRIVATE_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dsa_keypair, x) }, { .attr_id = TEE_ATTR_DSA_PUBLIC_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_BIGNUM_MAXBITS, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dsa_keypair, y) }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_dh_keypair_attrs[] = { { .attr_id = TEE_ATTR_DH_PRIME, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR | TEE_TYPE_ATTR_GEN_KEY_REQ, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dh_keypair, p) }, { .attr_id = TEE_ATTR_DH_BASE, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_GEN_KEY_REQ, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dh_keypair, g) }, { .attr_id = TEE_ATTR_DH_PUBLIC_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dh_keypair, y) }, { .attr_id = TEE_ATTR_DH_PRIVATE_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dh_keypair, x) }, { .attr_id = TEE_ATTR_DH_SUBPRIME, .flags = TEE_TYPE_ATTR_OPTIONAL_GROUP | TEE_TYPE_ATTR_GEN_KEY_OPT, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct dh_keypair, q) }, { .attr_id = TEE_ATTR_DH_X_BITS, .flags = TEE_TYPE_ATTR_GEN_KEY_OPT, .ops_index = ATTR_OPS_INDEX_VALUE, RAW_DATA(struct dh_keypair, xbits) }, }; #if defined(CFG_CRYPTO_HKDF) static const struct tee_cryp_obj_type_attrs tee_cryp_obj_hkdf_ikm_attrs[] = { { .attr_id = TEE_ATTR_HKDF_IKM, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, .ops_index = ATTR_OPS_INDEX_SECRET, .raw_offs = 0, .raw_size = 0 }, }; #endif #if defined(CFG_CRYPTO_CONCAT_KDF) static const struct tee_cryp_obj_type_attrs tee_cryp_obj_concat_kdf_z_attrs[] = { { .attr_id = TEE_ATTR_CONCAT_KDF_Z, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, .ops_index = ATTR_OPS_INDEX_SECRET, .raw_offs = 0, .raw_size = 0 }, }; #endif #if defined(CFG_CRYPTO_PBKDF2) static const struct tee_cryp_obj_type_attrs tee_cryp_obj_pbkdf2_passwd_attrs[] = { { .attr_id = TEE_ATTR_PBKDF2_PASSWORD, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, .ops_index = ATTR_OPS_INDEX_SECRET, .raw_offs = 0, .raw_size = 0 }, }; #endif static const struct tee_cryp_obj_type_attrs tee_cryp_obj_ecc_pub_key_attrs[] = { { .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_X, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct ecc_public_key, x) }, { .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_Y, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct ecc_public_key, y) }, { .attr_id = TEE_ATTR_ECC_CURVE, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR, .ops_index = ATTR_OPS_INDEX_VALUE, RAW_DATA(struct ecc_public_key, curve) }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_ecc_keypair_attrs[] = { { .attr_id = TEE_ATTR_ECC_PRIVATE_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct ecc_keypair, d) }, { .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_X, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct ecc_keypair, x) }, { .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_Y, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct ecc_keypair, y) }, { .attr_id = TEE_ATTR_ECC_CURVE, .flags = TEE_TYPE_ATTR_REQUIRED | TEE_TYPE_ATTR_SIZE_INDICATOR | TEE_TYPE_ATTR_GEN_KEY_REQ, .ops_index = ATTR_OPS_INDEX_VALUE, RAW_DATA(struct ecc_keypair, curve) }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_sm2_pub_key_attrs[] = { { .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_X, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct ecc_public_key, x) }, { .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_Y, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct ecc_public_key, y) }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_sm2_keypair_attrs[] = { { .attr_id = TEE_ATTR_ECC_PRIVATE_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct ecc_keypair, d) }, { .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_X, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct ecc_keypair, x) }, { .attr_id = TEE_ATTR_ECC_PUBLIC_VALUE_Y, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_BIGNUM, RAW_DATA(struct ecc_keypair, y) }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_x25519_keypair_attrs[] = { { .attr_id = TEE_ATTR_X25519_PRIVATE_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_25519, RAW_DATA(struct x25519_keypair, priv) }, { .attr_id = TEE_ATTR_X25519_PUBLIC_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_25519, RAW_DATA(struct x25519_keypair, pub) }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_ed25519_pub_key_attrs[] = { { .attr_id = TEE_ATTR_ED25519_PUBLIC_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_25519, RAW_DATA(struct ed25519_keypair, pub) }, }; static const struct tee_cryp_obj_type_attrs tee_cryp_obj_ed25519_keypair_attrs[] = { { .attr_id = TEE_ATTR_ED25519_PRIVATE_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_25519, RAW_DATA(struct ed25519_keypair, priv) }, { .attr_id = TEE_ATTR_ED25519_PUBLIC_VALUE, .flags = TEE_TYPE_ATTR_REQUIRED, .ops_index = ATTR_OPS_INDEX_25519, RAW_DATA(struct ed25519_keypair, pub) }, }; struct tee_cryp_obj_type_props { TEE_ObjectType obj_type; uint16_t min_size; /* may not be smaller than this */ uint16_t max_size; /* may not be larger than this */ uint16_t alloc_size; /* this many bytes are allocated to hold data */ uint8_t quanta; /* may only be an multiple of this */ uint8_t num_type_attrs; const struct tee_cryp_obj_type_attrs *type_attrs; }; #define PROP(obj_type, quanta, min_size, max_size, alloc_size, type_attrs) \ { (obj_type), (min_size), (max_size), (alloc_size), (quanta), \ ARRAY_SIZE(type_attrs), (type_attrs) } static const struct tee_cryp_obj_type_props tee_cryp_obj_props[] = { PROP(TEE_TYPE_AES, 64, 128, 256, /* valid sizes 128, 192, 256 */ 256 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_DES, 64, 64, 64, /* Valid size 64 with parity */ 64 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_DES3, 64, 128, 192, /* Valid sizes 128, 192 with parity */ 192 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_SM4, 128, 128, 128, 128 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_HMAC_MD5, 8, 64, 512, 512 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_HMAC_SHA1, 8, 80, 512, 512 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_HMAC_SHA224, 8, 112, 512, 512 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_HMAC_SHA256, 8, 192, 1024, 1024 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_HMAC_SHA384, 8, 256, 1024, 1024 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_HMAC_SHA512, 8, 256, 1024, 1024 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_HMAC_SM3, 8, 80, 1024, 512 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), PROP(TEE_TYPE_GENERIC_SECRET, 8, 0, 4096, 4096 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_secret_value_attrs), #if defined(CFG_CRYPTO_HKDF) PROP(TEE_TYPE_HKDF_IKM, 8, 0, 4096, 4096 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_hkdf_ikm_attrs), #endif #if defined(CFG_CRYPTO_CONCAT_KDF) PROP(TEE_TYPE_CONCAT_KDF_Z, 8, 0, 4096, 4096 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_concat_kdf_z_attrs), #endif #if defined(CFG_CRYPTO_PBKDF2) PROP(TEE_TYPE_PBKDF2_PASSWORD, 8, 0, 4096, 4096 / 8 + sizeof(struct tee_cryp_obj_secret), tee_cryp_obj_pbkdf2_passwd_attrs), #endif PROP(TEE_TYPE_RSA_PUBLIC_KEY, 1, 256, CFG_CORE_BIGNUM_MAX_BITS, sizeof(struct rsa_public_key), tee_cryp_obj_rsa_pub_key_attrs), PROP(TEE_TYPE_RSA_KEYPAIR, 1, 256, CFG_CORE_BIGNUM_MAX_BITS, sizeof(struct rsa_keypair), tee_cryp_obj_rsa_keypair_attrs), PROP(TEE_TYPE_DSA_PUBLIC_KEY, 64, 512, 3072, sizeof(struct dsa_public_key), tee_cryp_obj_dsa_pub_key_attrs), PROP(TEE_TYPE_DSA_KEYPAIR, 64, 512, 3072, sizeof(struct dsa_keypair), tee_cryp_obj_dsa_keypair_attrs), PROP(TEE_TYPE_DH_KEYPAIR, 1, 256, 2048, sizeof(struct dh_keypair), tee_cryp_obj_dh_keypair_attrs), PROP(TEE_TYPE_ECDSA_PUBLIC_KEY, 1, 192, 521, sizeof(struct ecc_public_key), tee_cryp_obj_ecc_pub_key_attrs), PROP(TEE_TYPE_ECDSA_KEYPAIR, 1, 192, 521, sizeof(struct ecc_keypair), tee_cryp_obj_ecc_keypair_attrs), PROP(TEE_TYPE_ECDH_PUBLIC_KEY, 1, 192, 521, sizeof(struct ecc_public_key), tee_cryp_obj_ecc_pub_key_attrs), PROP(TEE_TYPE_ECDH_KEYPAIR, 1, 192, 521, sizeof(struct ecc_keypair), tee_cryp_obj_ecc_keypair_attrs), PROP(TEE_TYPE_SM2_DSA_PUBLIC_KEY, 1, 256, 256, sizeof(struct ecc_public_key), tee_cryp_obj_sm2_pub_key_attrs), PROP(TEE_TYPE_SM2_DSA_KEYPAIR, 1, 256, 256, sizeof(struct ecc_keypair), tee_cryp_obj_sm2_keypair_attrs), PROP(TEE_TYPE_SM2_PKE_PUBLIC_KEY, 1, 256, 256, sizeof(struct ecc_public_key), tee_cryp_obj_sm2_pub_key_attrs), PROP(TEE_TYPE_SM2_PKE_KEYPAIR, 1, 256, 256, sizeof(struct ecc_keypair), tee_cryp_obj_sm2_keypair_attrs), PROP(TEE_TYPE_SM2_KEP_PUBLIC_KEY, 1, 256, 256, sizeof(struct ecc_public_key), tee_cryp_obj_sm2_pub_key_attrs), PROP(TEE_TYPE_SM2_KEP_KEYPAIR, 1, 256, 256, sizeof(struct ecc_keypair), tee_cryp_obj_sm2_keypair_attrs), PROP(TEE_TYPE_X25519_KEYPAIR, 1, 256, 256, sizeof(struct x25519_keypair), tee_cryp_obj_x25519_keypair_attrs), PROP(TEE_TYPE_ED25519_PUBLIC_KEY, 1, 256, 256, sizeof(struct ed25519_keypair), tee_cryp_obj_ed25519_pub_key_attrs), PROP(TEE_TYPE_ED25519_KEYPAIR, 1, 256, 256, sizeof(struct ed25519_keypair), tee_cryp_obj_ed25519_keypair_attrs), }; struct attr_ops { TEE_Result (*from_user)(void *attr, const void *buffer, size_t size); TEE_Result (*to_user)(void *attr, struct ts_session *sess, void *buffer, uint64_t *size); TEE_Result (*to_binary)(void *attr, void *data, size_t data_len, size_t *offs); bool (*from_binary)(void *attr, const void *data, size_t data_len, size_t *offs); TEE_Result (*from_obj)(void *attr, void *src_attr); void (*free)(void *attr); void (*clear)(void *attr); }; static TEE_Result op_u32_to_binary_helper(uint32_t v, uint8_t *data, size_t data_len, size_t *offs) { uint32_t field; size_t next_offs; if (ADD_OVERFLOW(*offs, sizeof(field), &next_offs)) return TEE_ERROR_OVERFLOW; if (data && next_offs <= data_len) { field = TEE_U32_TO_BIG_ENDIAN(v); memcpy(data + *offs, &field, sizeof(field)); } (*offs) = next_offs; return TEE_SUCCESS; } static bool op_u32_from_binary_helper(uint32_t *v, const uint8_t *data, size_t data_len, size_t *offs) { uint32_t field; if (!data || (*offs + sizeof(field)) > data_len) return false; memcpy(&field, data + *offs, sizeof(field)); *v = TEE_U32_FROM_BIG_ENDIAN(field); (*offs) += sizeof(field); return true; } static TEE_Result op_attr_secret_value_from_user(void *attr, const void *buffer, size_t size) { struct tee_cryp_obj_secret *key = attr; /* Data size has to fit in allocated buffer */ if (size > key->alloc_size) return TEE_ERROR_SECURITY; memcpy(key + 1, buffer, size); key->key_size = size; return TEE_SUCCESS; } static TEE_Result op_attr_secret_value_to_user(void *attr, struct ts_session *sess __unused, void *buffer, uint64_t *size) { TEE_Result res; struct tee_cryp_obj_secret *key = attr; uint64_t s; uint64_t key_size; res = copy_from_user(&s, size, sizeof(s)); if (res != TEE_SUCCESS) return res; key_size = key->key_size; res = copy_to_user(size, &key_size, sizeof(key_size)); if (res != TEE_SUCCESS) return res; if (s < key->key_size || !buffer) return TEE_ERROR_SHORT_BUFFER; return copy_to_user(buffer, key + 1, key->key_size); } static TEE_Result op_attr_secret_value_to_binary(void *attr, void *data, size_t data_len, size_t *offs) { TEE_Result res; struct tee_cryp_obj_secret *key = attr; size_t next_offs; res = op_u32_to_binary_helper(key->key_size, data, data_len, offs); if (res != TEE_SUCCESS) return res; if (ADD_OVERFLOW(*offs, key->key_size, &next_offs)) return TEE_ERROR_OVERFLOW; if (data && next_offs <= data_len) memcpy((uint8_t *)data + *offs, key + 1, key->key_size); (*offs) = next_offs; return TEE_SUCCESS; } static bool op_attr_secret_value_from_binary(void *attr, const void *data, size_t data_len, size_t *offs) { struct tee_cryp_obj_secret *key = attr; uint32_t s; if (!op_u32_from_binary_helper(&s, data, data_len, offs)) return false; if ((*offs + s) > data_len) return false; /* Data size has to fit in allocated buffer */ if (s > key->alloc_size) return false; key->key_size = s; memcpy(key + 1, (const uint8_t *)data + *offs, s); (*offs) += s; return true; } static TEE_Result op_attr_secret_value_from_obj(void *attr, void *src_attr) { struct tee_cryp_obj_secret *key = attr; struct tee_cryp_obj_secret *src_key = src_attr; if (src_key->key_size > key->alloc_size) return TEE_ERROR_BAD_STATE; memcpy(key + 1, src_key + 1, src_key->key_size); key->key_size = src_key->key_size; return TEE_SUCCESS; } static void op_attr_secret_value_clear(void *attr) { struct tee_cryp_obj_secret *key = attr; key->key_size = 0; memzero_explicit(key + 1, key->alloc_size); } static TEE_Result op_attr_bignum_from_user(void *attr, const void *buffer, size_t size) { struct bignum **bn = attr; return crypto_bignum_bin2bn(buffer, size, *bn); } static TEE_Result op_attr_bignum_to_user(void *attr, struct ts_session *sess, void *buffer, uint64_t *size) { TEE_Result res = TEE_SUCCESS; struct bignum **bn = attr; uint64_t req_size = 0; uint64_t s = 0; res = copy_from_user(&s, size, sizeof(s)); if (res != TEE_SUCCESS) return res; req_size = crypto_bignum_num_bytes(*bn); res = copy_to_user(size, &req_size, sizeof(req_size)); if (res != TEE_SUCCESS) return res; if (!req_size) return TEE_SUCCESS; if (s < req_size || !buffer) return TEE_ERROR_SHORT_BUFFER; buffer = memtag_strip_tag(buffer); /* Check we can access data using supplied user mode pointer */ res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_WRITE | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)buffer, req_size); if (res != TEE_SUCCESS) return res; /* * Write the bignum (wich raw data points to) into an array of * bytes (stored in buffer) */ crypto_bignum_bn2bin(*bn, buffer); return TEE_SUCCESS; } static TEE_Result op_attr_bignum_to_binary(void *attr, void *data, size_t data_len, size_t *offs) { TEE_Result res; struct bignum **bn = attr; uint32_t n = crypto_bignum_num_bytes(*bn); size_t next_offs; res = op_u32_to_binary_helper(n, data, data_len, offs); if (res != TEE_SUCCESS) return res; if (ADD_OVERFLOW(*offs, n, &next_offs)) return TEE_ERROR_OVERFLOW; if (data && next_offs <= data_len) crypto_bignum_bn2bin(*bn, (uint8_t *)data + *offs); (*offs) = next_offs; return TEE_SUCCESS; } static bool op_attr_bignum_from_binary(void *attr, const void *data, size_t data_len, size_t *offs) { struct bignum **bn = attr; uint32_t n; if (!op_u32_from_binary_helper(&n, data, data_len, offs)) return false; if ((*offs + n) > data_len) return false; if (crypto_bignum_bin2bn((const uint8_t *)data + *offs, n, *bn)) return false; (*offs) += n; return true; } static TEE_Result op_attr_bignum_from_obj(void *attr, void *src_attr) { struct bignum **bn = attr; struct bignum **src_bn = src_attr; crypto_bignum_copy(*bn, *src_bn); return TEE_SUCCESS; } static void op_attr_bignum_clear(void *attr) { struct bignum **bn = attr; crypto_bignum_clear(*bn); } static void op_attr_bignum_free(void *attr) { struct bignum **bn = attr; crypto_bignum_free(*bn); *bn = NULL; } static TEE_Result op_attr_value_from_user(void *attr, const void *buffer, size_t size) { uint32_t *v = attr; if (size != sizeof(uint32_t) * 2) return TEE_ERROR_GENERIC; /* "can't happen */ /* Note that only the first value is copied */ memcpy(v, buffer, sizeof(uint32_t)); return TEE_SUCCESS; } static TEE_Result op_attr_value_to_user(void *attr, struct ts_session *sess __unused, void *buffer, uint64_t *size) { TEE_Result res; uint32_t *v = attr; uint64_t s; uint32_t value[2] = { *v }; uint64_t req_size = sizeof(value); res = copy_from_user(&s, size, sizeof(s)); if (res != TEE_SUCCESS) return res; if (s < req_size || !buffer) return TEE_ERROR_SHORT_BUFFER; return copy_to_user(buffer, value, req_size); } static TEE_Result op_attr_value_to_binary(void *attr, void *data, size_t data_len, size_t *offs) { uint32_t *v = attr; return op_u32_to_binary_helper(*v, data, data_len, offs); } static bool op_attr_value_from_binary(void *attr, const void *data, size_t data_len, size_t *offs) { uint32_t *v = attr; return op_u32_from_binary_helper(v, data, data_len, offs); } static TEE_Result op_attr_value_from_obj(void *attr, void *src_attr) { uint32_t *v = attr; uint32_t *src_v = src_attr; *v = *src_v; return TEE_SUCCESS; } static void op_attr_value_clear(void *attr) { uint32_t *v = attr; *v = 0; } static TEE_Result op_attr_25519_from_user(void *attr, const void *buffer, size_t size) { uint8_t **key = attr; if (size != KEY_SIZE_BYTES_25519 || !*key) return TEE_ERROR_SECURITY; memcpy(*key, buffer, size); return TEE_SUCCESS; } static TEE_Result op_attr_25519_to_user(void *attr, struct ts_session *sess __unused, void *buffer, uint64_t *size) { TEE_Result res = TEE_ERROR_GENERIC; uint8_t **key = attr; uint64_t s = 0; uint64_t key_size = (uint64_t)KEY_SIZE_BYTES_25519; res = copy_from_user(&s, size, sizeof(s)); if (res != TEE_SUCCESS) return res; res = copy_to_user(size, &key_size, sizeof(key_size)); if (res != TEE_SUCCESS) return res; if (s < key_size || !buffer) return TEE_ERROR_SHORT_BUFFER; return copy_to_user(buffer, *key, key_size); } static TEE_Result op_attr_25519_to_binary(void *attr, void *data, size_t data_len, size_t *offs) { TEE_Result res = TEE_ERROR_GENERIC; uint8_t **key = attr; size_t next_offs = 0; uint64_t key_size = (uint64_t)KEY_SIZE_BYTES_25519; res = op_u32_to_binary_helper(key_size, data, data_len, offs); if (res != TEE_SUCCESS) return res; if (ADD_OVERFLOW(*offs, key_size, &next_offs)) return TEE_ERROR_OVERFLOW; if (data && next_offs <= data_len) memcpy((uint8_t *)data + *offs, *key, key_size); *offs = next_offs; return TEE_SUCCESS; } static bool op_attr_25519_from_binary(void *attr, const void *data, size_t data_len, size_t *offs) { uint8_t **key = attr; uint32_t s = 0; if (!op_u32_from_binary_helper(&s, data, data_len, offs)) return false; if (*offs + s > data_len) return false; if (s > (uint32_t)KEY_SIZE_BYTES_25519) return false; memcpy(*key, (const uint8_t *)data + *offs, s); *offs += s; return true; } static TEE_Result op_attr_25519_from_obj(void *attr, void *src_attr) { uint8_t **key = attr; uint8_t **src_key = src_attr; if (!*key || !*src_key) return TEE_ERROR_SECURITY; memcpy(*key, *src_key, KEY_SIZE_BYTES_25519); return TEE_SUCCESS; } static void op_attr_25519_clear(void *attr) { uint8_t **key = attr; assert(*key); memzero_explicit(*key, KEY_SIZE_BYTES_25519); } static void op_attr_25519_free(void *attr) { uint8_t **key = attr; op_attr_25519_clear(attr); free(*key); } static const struct attr_ops attr_ops[] = { [ATTR_OPS_INDEX_SECRET] = { .from_user = op_attr_secret_value_from_user, .to_user = op_attr_secret_value_to_user, .to_binary = op_attr_secret_value_to_binary, .from_binary = op_attr_secret_value_from_binary, .from_obj = op_attr_secret_value_from_obj, .free = op_attr_secret_value_clear, /* not a typo */ .clear = op_attr_secret_value_clear, }, [ATTR_OPS_INDEX_BIGNUM] = { .from_user = op_attr_bignum_from_user, .to_user = op_attr_bignum_to_user, .to_binary = op_attr_bignum_to_binary, .from_binary = op_attr_bignum_from_binary, .from_obj = op_attr_bignum_from_obj, .free = op_attr_bignum_free, .clear = op_attr_bignum_clear, }, [ATTR_OPS_INDEX_VALUE] = { .from_user = op_attr_value_from_user, .to_user = op_attr_value_to_user, .to_binary = op_attr_value_to_binary, .from_binary = op_attr_value_from_binary, .from_obj = op_attr_value_from_obj, .free = op_attr_value_clear, /* not a typo */ .clear = op_attr_value_clear, }, [ATTR_OPS_INDEX_25519] = { .from_user = op_attr_25519_from_user, .to_user = op_attr_25519_to_user, .to_binary = op_attr_25519_to_binary, .from_binary = op_attr_25519_from_binary, .from_obj = op_attr_25519_from_obj, .free = op_attr_25519_free, .clear = op_attr_25519_clear, }, }; static TEE_Result get_user_u64_as_size_t(size_t *dst, uint64_t *src) { uint64_t d = 0; TEE_Result res = copy_from_user(&d, src, sizeof(d)); /* * On 32-bit systems a size_t can't hold a uint64_t so we need to * check that the value isn't too large. */ if (!res && ADD_OVERFLOW(0, d, dst)) return TEE_ERROR_OVERFLOW; return res; } static TEE_Result put_user_u64(uint64_t *dst, size_t value) { uint64_t v = value; return copy_to_user(dst, &v, sizeof(v)); } TEE_Result syscall_cryp_obj_get_info(unsigned long obj, struct utee_object_info *info) { struct ts_session *sess = ts_get_current_session(); struct utee_object_info o_info = { }; TEE_Result res = TEE_SUCCESS; struct tee_obj *o = NULL; res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); if (res != TEE_SUCCESS) goto exit; o_info.obj_type = o->info.objectType; o_info.obj_size = o->info.objectSize; o_info.max_obj_size = o->info.maxObjectSize; o_info.obj_usage = o->info.objectUsage; o_info.data_size = o->info.dataSize; o_info.data_pos = o->info.dataPosition; o_info.handle_flags = o->info.handleFlags; res = copy_to_user_private(info, &o_info, sizeof(o_info)); exit: return res; } TEE_Result syscall_cryp_obj_restrict_usage(unsigned long obj, unsigned long usage) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_obj *o = NULL; res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); if (res != TEE_SUCCESS) goto exit; o->info.objectUsage &= usage; exit: return res; } static int tee_svc_cryp_obj_find_type_attr_idx( uint32_t attr_id, const struct tee_cryp_obj_type_props *type_props) { size_t n; for (n = 0; n < type_props->num_type_attrs; n++) { if (attr_id == type_props->type_attrs[n].attr_id) return n; } return -1; } static const struct tee_cryp_obj_type_props *tee_svc_find_type_props( TEE_ObjectType obj_type) { size_t n; for (n = 0; n < ARRAY_SIZE(tee_cryp_obj_props); n++) { if (tee_cryp_obj_props[n].obj_type == obj_type) return tee_cryp_obj_props + n; } return NULL; } /* Set an attribute on an object */ static void set_attribute(struct tee_obj *o, const struct tee_cryp_obj_type_props *props, uint32_t attr) { int idx = tee_svc_cryp_obj_find_type_attr_idx(attr, props); if (idx < 0) return; o->have_attrs |= BIT(idx); } /* Get an attribute on an object */ static uint32_t get_attribute(const struct tee_obj *o, const struct tee_cryp_obj_type_props *props, uint32_t attr) { int idx = tee_svc_cryp_obj_find_type_attr_idx(attr, props); if (idx < 0) return 0; return o->have_attrs & BIT(idx); } TEE_Result syscall_cryp_obj_get_attr(unsigned long obj, unsigned long attr_id, void *buffer, uint64_t *size) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_obj *o = NULL; const struct tee_cryp_obj_type_props *type_props = NULL; int idx = 0; const struct attr_ops *ops = NULL; void *attr = NULL; res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); if (res != TEE_SUCCESS) return TEE_ERROR_ITEM_NOT_FOUND; /* Check that the object is initialized */ if (!(o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED)) return TEE_ERROR_BAD_PARAMETERS; /* Check that getting the attribute is allowed */ if (!(attr_id & TEE_ATTR_FLAG_PUBLIC) && !(o->info.objectUsage & TEE_USAGE_EXTRACTABLE)) return TEE_ERROR_BAD_PARAMETERS; type_props = tee_svc_find_type_props(o->info.objectType); if (!type_props) { /* Unknown object type, "can't happen" */ return TEE_ERROR_BAD_STATE; } idx = tee_svc_cryp_obj_find_type_attr_idx(attr_id, type_props); if ((idx < 0) || ((o->have_attrs & (1 << idx)) == 0)) return TEE_ERROR_ITEM_NOT_FOUND; ops = attr_ops + type_props->type_attrs[idx].ops_index; attr = (uint8_t *)o->attr + type_props->type_attrs[idx].raw_offs; return ops->to_user(attr, sess, buffer, size); } void tee_obj_attr_free(struct tee_obj *o) { const struct tee_cryp_obj_type_props *tp; size_t n; if (!o->attr) return; tp = tee_svc_find_type_props(o->info.objectType); if (!tp) return; for (n = 0; n < tp->num_type_attrs; n++) { const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; attr_ops[ta->ops_index].free((uint8_t *)o->attr + ta->raw_offs); } } void tee_obj_attr_clear(struct tee_obj *o) { const struct tee_cryp_obj_type_props *tp; size_t n; if (!o->attr) return; tp = tee_svc_find_type_props(o->info.objectType); if (!tp) return; for (n = 0; n < tp->num_type_attrs; n++) { const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; attr_ops[ta->ops_index].clear((uint8_t *)o->attr + ta->raw_offs); } } TEE_Result tee_obj_attr_to_binary(struct tee_obj *o, void *data, size_t *data_len) { const struct tee_cryp_obj_type_props *tp; size_t n; size_t offs = 0; size_t len = data ? *data_len : 0; TEE_Result res; if (o->info.objectType == TEE_TYPE_DATA) { *data_len = 0; return TEE_SUCCESS; /* pure data object */ } if (!o->attr) return TEE_ERROR_BAD_STATE; tp = tee_svc_find_type_props(o->info.objectType); if (!tp) return TEE_ERROR_BAD_STATE; for (n = 0; n < tp->num_type_attrs; n++) { const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; void *attr = (uint8_t *)o->attr + ta->raw_offs; res = attr_ops[ta->ops_index].to_binary(attr, data, len, &offs); if (res != TEE_SUCCESS) return res; } *data_len = offs; if (data && offs > len) return TEE_ERROR_SHORT_BUFFER; return TEE_SUCCESS; } TEE_Result tee_obj_attr_from_binary(struct tee_obj *o, const void *data, size_t data_len) { const struct tee_cryp_obj_type_props *tp; size_t n; size_t offs = 0; if (o->info.objectType == TEE_TYPE_DATA) return TEE_SUCCESS; /* pure data object */ if (!o->attr) return TEE_ERROR_BAD_STATE; tp = tee_svc_find_type_props(o->info.objectType); if (!tp) return TEE_ERROR_BAD_STATE; for (n = 0; n < tp->num_type_attrs; n++) { const struct tee_cryp_obj_type_attrs *ta = tp->type_attrs + n; void *attr = (uint8_t *)o->attr + ta->raw_offs; if (!attr_ops[ta->ops_index].from_binary(attr, data, data_len, &offs)) return TEE_ERROR_CORRUPT_OBJECT; } return TEE_SUCCESS; } TEE_Result tee_obj_attr_copy_from(struct tee_obj *o, const struct tee_obj *src) { TEE_Result res; const struct tee_cryp_obj_type_props *tp; const struct tee_cryp_obj_type_attrs *ta; size_t n; uint32_t have_attrs = 0; void *attr; void *src_attr; if (o->info.objectType == TEE_TYPE_DATA) return TEE_SUCCESS; /* pure data object */ if (!o->attr) return TEE_ERROR_BAD_STATE; tp = tee_svc_find_type_props(o->info.objectType); if (!tp) return TEE_ERROR_BAD_STATE; if (o->info.objectType == src->info.objectType) { have_attrs = src->have_attrs; for (n = 0; n < tp->num_type_attrs; n++) { ta = tp->type_attrs + n; attr = (uint8_t *)o->attr + ta->raw_offs; src_attr = (uint8_t *)src->attr + ta->raw_offs; res = attr_ops[ta->ops_index].from_obj(attr, src_attr); if (res != TEE_SUCCESS) return res; } } else { const struct tee_cryp_obj_type_props *tp_src; int idx; if (o->info.objectType == TEE_TYPE_RSA_PUBLIC_KEY) { if (src->info.objectType != TEE_TYPE_RSA_KEYPAIR) return TEE_ERROR_BAD_PARAMETERS; } else if (o->info.objectType == TEE_TYPE_DSA_PUBLIC_KEY) { if (src->info.objectType != TEE_TYPE_DSA_KEYPAIR) return TEE_ERROR_BAD_PARAMETERS; } else if (o->info.objectType == TEE_TYPE_ECDSA_PUBLIC_KEY) { if (src->info.objectType != TEE_TYPE_ECDSA_KEYPAIR) return TEE_ERROR_BAD_PARAMETERS; } else if (o->info.objectType == TEE_TYPE_ECDH_PUBLIC_KEY) { if (src->info.objectType != TEE_TYPE_ECDH_KEYPAIR) return TEE_ERROR_BAD_PARAMETERS; } else if (o->info.objectType == TEE_TYPE_SM2_DSA_PUBLIC_KEY) { if (src->info.objectType != TEE_TYPE_SM2_DSA_KEYPAIR) return TEE_ERROR_BAD_PARAMETERS; } else if (o->info.objectType == TEE_TYPE_SM2_PKE_PUBLIC_KEY) { if (src->info.objectType != TEE_TYPE_SM2_PKE_KEYPAIR) return TEE_ERROR_BAD_PARAMETERS; } else if (o->info.objectType == TEE_TYPE_SM2_KEP_PUBLIC_KEY) { if (src->info.objectType != TEE_TYPE_SM2_KEP_KEYPAIR) return TEE_ERROR_BAD_PARAMETERS; } else if (o->info.objectType == TEE_TYPE_ED25519_PUBLIC_KEY) { if (src->info.objectType != TEE_TYPE_ED25519_KEYPAIR) return TEE_ERROR_BAD_PARAMETERS; } else if (o->info.objectType == TEE_TYPE_X25519_PUBLIC_KEY) { if (src->info.objectType != TEE_TYPE_X25519_KEYPAIR) return TEE_ERROR_BAD_PARAMETERS; } else { return TEE_ERROR_BAD_PARAMETERS; } tp_src = tee_svc_find_type_props(src->info.objectType); if (!tp_src) return TEE_ERROR_BAD_STATE; have_attrs = BIT32(tp->num_type_attrs) - 1; for (n = 0; n < tp->num_type_attrs; n++) { ta = tp->type_attrs + n; idx = tee_svc_cryp_obj_find_type_attr_idx(ta->attr_id, tp_src); if (idx < 0) return TEE_ERROR_BAD_STATE; attr = (uint8_t *)o->attr + ta->raw_offs; src_attr = (uint8_t *)src->attr + tp_src->type_attrs[idx].raw_offs; res = attr_ops[ta->ops_index].from_obj(attr, src_attr); if (res != TEE_SUCCESS) return res; } } o->have_attrs = have_attrs; return TEE_SUCCESS; } static bool is_gp_legacy_des_key_size(TEE_ObjectType type, size_t sz) { return IS_ENABLED(CFG_COMPAT_GP10_DES) && ((type == TEE_TYPE_DES && sz == 56) || (type == TEE_TYPE_DES3 && (sz == 112 || sz == 168))); } static TEE_Result check_key_size(const struct tee_cryp_obj_type_props *props, size_t key_size) { size_t sz = key_size; /* * In GP Internal API Specification 1.0 the partity bits aren't * counted when telling the size of the key in bits so add them * here if missing. */ if (is_gp_legacy_des_key_size(props->obj_type, sz)) sz += sz / 7; if (sz % props->quanta != 0) return TEE_ERROR_NOT_SUPPORTED; if (sz < props->min_size) return TEE_ERROR_NOT_SUPPORTED; if (sz > props->max_size) return TEE_ERROR_NOT_SUPPORTED; return TEE_SUCCESS; } TEE_Result tee_obj_set_type(struct tee_obj *o, uint32_t obj_type, size_t max_key_size) { TEE_Result res = TEE_SUCCESS; const struct tee_cryp_obj_type_props *type_props; /* Can only set type for newly allocated objs */ if (o->attr) return TEE_ERROR_BAD_STATE; /* * Verify that maxObjectSize is supported and find out how * much should be allocated. */ if (obj_type == TEE_TYPE_DATA) { if (max_key_size) return TEE_ERROR_NOT_SUPPORTED; } else { /* Find description of object */ type_props = tee_svc_find_type_props(obj_type); if (!type_props) return TEE_ERROR_NOT_SUPPORTED; /* Check that max_key_size follows restrictions */ res = check_key_size(type_props, max_key_size); if (res) return res; o->attr = calloc(1, type_props->alloc_size); if (!o->attr) return TEE_ERROR_OUT_OF_MEMORY; } /* If we have a key structure, pre-allocate the bignums inside */ switch (obj_type) { case TEE_TYPE_RSA_PUBLIC_KEY: res = crypto_acipher_alloc_rsa_public_key(o->attr, max_key_size); break; case TEE_TYPE_RSA_KEYPAIR: res = crypto_acipher_alloc_rsa_keypair(o->attr, max_key_size); break; case TEE_TYPE_DSA_PUBLIC_KEY: res = crypto_acipher_alloc_dsa_public_key(o->attr, max_key_size); break; case TEE_TYPE_DSA_KEYPAIR: res = crypto_acipher_alloc_dsa_keypair(o->attr, max_key_size); break; case TEE_TYPE_DH_KEYPAIR: res = crypto_acipher_alloc_dh_keypair(o->attr, max_key_size); break; case TEE_TYPE_ECDSA_PUBLIC_KEY: case TEE_TYPE_ECDH_PUBLIC_KEY: case TEE_TYPE_SM2_DSA_PUBLIC_KEY: case TEE_TYPE_SM2_PKE_PUBLIC_KEY: case TEE_TYPE_SM2_KEP_PUBLIC_KEY: res = crypto_acipher_alloc_ecc_public_key(o->attr, obj_type, max_key_size); break; case TEE_TYPE_ECDSA_KEYPAIR: case TEE_TYPE_ECDH_KEYPAIR: case TEE_TYPE_SM2_DSA_KEYPAIR: case TEE_TYPE_SM2_PKE_KEYPAIR: case TEE_TYPE_SM2_KEP_KEYPAIR: res = crypto_acipher_alloc_ecc_keypair(o->attr, obj_type, max_key_size); break; case TEE_TYPE_X25519_KEYPAIR: res = crypto_acipher_alloc_x25519_keypair(o->attr, max_key_size); break; case TEE_TYPE_ED25519_KEYPAIR: case TEE_TYPE_ED25519_PUBLIC_KEY: res = crypto_acipher_alloc_ed25519_keypair(o->attr, max_key_size); break; default: if (obj_type != TEE_TYPE_DATA) { struct tee_cryp_obj_secret *key = o->attr; key->alloc_size = type_props->alloc_size - sizeof(*key); } break; } if (res != TEE_SUCCESS) return res; o->info.objectType = obj_type; o->info.maxObjectSize = max_key_size; o->info.objectUsage = TEE_USAGE_DEFAULT; return TEE_SUCCESS; } TEE_Result syscall_cryp_obj_alloc(unsigned long obj_type, unsigned long max_key_size, uint32_t *obj) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_obj *o = NULL; o = tee_obj_alloc(); if (!o) return TEE_ERROR_OUT_OF_MEMORY; res = tee_obj_set_type(o, obj_type, max_key_size); if (res != TEE_SUCCESS) { tee_obj_free(o); return res; } tee_obj_add(to_user_ta_ctx(sess->ctx), o); res = copy_kaddr_to_uref(obj, o); if (res != TEE_SUCCESS) tee_obj_close(to_user_ta_ctx(sess->ctx), o); return res; } TEE_Result syscall_cryp_obj_close(unsigned long obj) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_obj *o = NULL; res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); if (res != TEE_SUCCESS) return res; /* * If it's busy it's used by an operation, a client should never have * this handle. */ if (o->busy) return TEE_ERROR_ITEM_NOT_FOUND; tee_obj_close(to_user_ta_ctx(sess->ctx), o); return TEE_SUCCESS; } TEE_Result syscall_cryp_obj_reset(unsigned long obj) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_obj *o = NULL; res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); if (res != TEE_SUCCESS) return res; if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) == 0) { tee_obj_attr_clear(o); o->info.objectSize = 0; o->info.objectUsage = TEE_USAGE_DEFAULT; } else { return TEE_ERROR_BAD_PARAMETERS; } /* the object is no more initialized */ o->info.handleFlags &= ~TEE_HANDLE_FLAG_INITIALIZED; return TEE_SUCCESS; } static TEE_Result copy_in_attrs(struct user_ta_ctx *utc, const struct utee_attribute *usr_attrs, uint32_t attr_count, TEE_Attribute *attrs) { TEE_Result res = TEE_SUCCESS; size_t size = 0; uint32_t n = 0; if (MUL_OVERFLOW(sizeof(struct utee_attribute), attr_count, &size)) return TEE_ERROR_OVERFLOW; usr_attrs = memtag_strip_tag_const(usr_attrs); res = vm_check_access_rights(&utc->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)usr_attrs, size); if (res != TEE_SUCCESS) return res; for (n = 0; n < attr_count; n++) { attrs[n].attributeID = usr_attrs[n].attribute_id; if (attrs[n].attributeID & TEE_ATTR_FLAG_VALUE) { attrs[n].content.value.a = usr_attrs[n].a; attrs[n].content.value.b = usr_attrs[n].b; } else { uintptr_t buf = usr_attrs[n].a; size_t len = usr_attrs[n].b; uint32_t flags = TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER; buf = memtag_strip_tag_vaddr((void *)buf); res = vm_check_access_rights(&utc->uctx, flags, buf, len); if (res != TEE_SUCCESS) return res; attrs[n].content.ref.buffer = (void *)buf; attrs[n].content.ref.length = len; } } return TEE_SUCCESS; } enum attr_usage { ATTR_USAGE_POPULATE, ATTR_USAGE_GENERATE_KEY }; static TEE_Result tee_svc_cryp_check_attr(enum attr_usage usage, const struct tee_cryp_obj_type_props *type_props, const TEE_Attribute *attrs, uint32_t attr_count) { uint32_t required_flag = 0; uint32_t opt_flag = 0; bool all_opt_needed = false; uint32_t req_attrs = 0; uint32_t opt_grp_attrs = 0; uint32_t attrs_found = 0; size_t n = 0; uint32_t bit = 0; uint32_t flags = 0; int idx = 0; if (usage == ATTR_USAGE_POPULATE) { required_flag = TEE_TYPE_ATTR_REQUIRED; opt_flag = TEE_TYPE_ATTR_OPTIONAL_GROUP; all_opt_needed = true; } else { required_flag = TEE_TYPE_ATTR_GEN_KEY_REQ; opt_flag = TEE_TYPE_ATTR_GEN_KEY_OPT; all_opt_needed = false; } /* * First find out which attributes are required and which belong to * the optional group */ for (n = 0; n < type_props->num_type_attrs; n++) { bit = 1 << n; flags = type_props->type_attrs[n].flags; if (flags & required_flag) req_attrs |= bit; else if (flags & opt_flag) opt_grp_attrs |= bit; } /* * Verify that all required attributes are in place and * that the same attribute isn't repeated. */ for (n = 0; n < attr_count; n++) { idx = tee_svc_cryp_obj_find_type_attr_idx( attrs[n].attributeID, type_props); /* attribute not defined in current object type */ if (idx < 0) return TEE_ERROR_ITEM_NOT_FOUND; bit = 1 << idx; /* attribute not repeated */ if ((attrs_found & bit) != 0) return TEE_ERROR_ITEM_NOT_FOUND; /* * Attribute not defined in current object type for this * usage. */ if (!(bit & (req_attrs | opt_grp_attrs))) return TEE_ERROR_ITEM_NOT_FOUND; attrs_found |= bit; } /* Required attribute missing */ if ((attrs_found & req_attrs) != req_attrs) return TEE_ERROR_ITEM_NOT_FOUND; /* * If the flag says that "if one of the optional attributes are included * all of them has to be included" this must be checked. */ if (all_opt_needed && (attrs_found & opt_grp_attrs) != 0 && (attrs_found & opt_grp_attrs) != opt_grp_attrs) return TEE_ERROR_ITEM_NOT_FOUND; return TEE_SUCCESS; } static TEE_Result get_ec_key_size(uint32_t curve, size_t *key_size) { switch (curve) { case TEE_ECC_CURVE_NIST_P192: *key_size = 192; break; case TEE_ECC_CURVE_NIST_P224: *key_size = 224; break; case TEE_ECC_CURVE_NIST_P256: *key_size = 256; break; case TEE_ECC_CURVE_NIST_P384: *key_size = 384; break; case TEE_ECC_CURVE_NIST_P521: *key_size = 521; break; case TEE_ECC_CURVE_SM2: case TEE_ECC_CURVE_25519: *key_size = 256; break; default: return TEE_ERROR_NOT_SUPPORTED; } return TEE_SUCCESS; } static size_t get_used_bits(const TEE_Attribute *a) { int nbits = a->content.ref.length * 8; int v = 0; bit_ffs(a->content.ref.buffer, nbits, &v); return nbits - v; } static TEE_Result tee_svc_cryp_obj_populate_type( struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, const TEE_Attribute *attrs, uint32_t attr_count) { TEE_Result res = TEE_SUCCESS; uint32_t have_attrs = 0; size_t obj_size = 0; size_t n = 0; int idx = 0; const struct attr_ops *ops = NULL; void *attr = NULL; for (n = 0; n < attr_count; n++) { idx = tee_svc_cryp_obj_find_type_attr_idx( attrs[n].attributeID, type_props); /* attribute not defined in current object type */ if (idx < 0) return TEE_ERROR_ITEM_NOT_FOUND; have_attrs |= BIT32(idx); ops = attr_ops + type_props->type_attrs[idx].ops_index; attr = (uint8_t *)o->attr + type_props->type_attrs[idx].raw_offs; if (attrs[n].attributeID & TEE_ATTR_FLAG_VALUE) res = ops->from_user(attr, &attrs[n].content.value, sizeof(attrs[n].content.value)); else res = ops->from_user(attr, attrs[n].content.ref.buffer, attrs[n].content.ref.length); if (res != TEE_SUCCESS) return res; /* * The attribute that gives the size of the object is * flagged with TEE_TYPE_ATTR_SIZE_INDICATOR. */ if (type_props->type_attrs[idx].flags & TEE_TYPE_ATTR_SIZE_INDICATOR) { /* There should be only one */ if (obj_size) return TEE_ERROR_BAD_STATE; /* * For ECDSA/ECDH we need to translate curve into * object size */ if (attrs[n].attributeID == TEE_ATTR_ECC_CURVE) { res = get_ec_key_size(attrs[n].content.value.a, &obj_size); if (res != TEE_SUCCESS) return res; } else { TEE_ObjectType obj_type = o->info.objectType; size_t sz = o->info.maxObjectSize; obj_size = attrs[n].content.ref.length * 8; /* Drop the parity bits for legacy objects */ if (is_gp_legacy_des_key_size(obj_type, sz)) obj_size -= obj_size / 8; } if (obj_size > o->info.maxObjectSize) return TEE_ERROR_BAD_STATE; res = check_key_size(type_props, obj_size); if (res != TEE_SUCCESS) return TEE_ERROR_BAD_PARAMETERS; } /* * Bignum attributes limited by the number of bits in * o->info.objectSize are flagged with * TEE_TYPE_ATTR_BIGNUM_MAXBITS. */ if (type_props->type_attrs[idx].flags & TEE_TYPE_ATTR_BIGNUM_MAXBITS) { if (get_used_bits(attrs + n) > o->info.maxObjectSize) return TEE_ERROR_BAD_STATE; } } o->have_attrs = have_attrs; o->info.objectSize = obj_size; /* * In GP Internal API Specification 1.0 the partity bits aren't * counted when telling the size of the key in bits so remove the * parity bits here. */ if (is_gp_legacy_des_key_size(o->info.objectType, o->info.maxObjectSize)) o->info.objectSize -= o->info.objectSize / 8; return TEE_SUCCESS; } TEE_Result syscall_cryp_obj_populate(unsigned long obj, struct utee_attribute *usr_attrs, unsigned long attr_count) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_obj *o = NULL; const struct tee_cryp_obj_type_props *type_props = NULL; TEE_Attribute *attrs = NULL; size_t alloc_size = 0; res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); if (res != TEE_SUCCESS) return res; /* Must be a transient object */ if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) return TEE_ERROR_BAD_PARAMETERS; /* Must not be initialized already */ if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) return TEE_ERROR_BAD_PARAMETERS; type_props = tee_svc_find_type_props(o->info.objectType); if (!type_props) return TEE_ERROR_NOT_IMPLEMENTED; if (MUL_OVERFLOW(sizeof(TEE_Attribute), attr_count, &alloc_size)) return TEE_ERROR_OVERFLOW; attrs = malloc(alloc_size); if (!attrs) return TEE_ERROR_OUT_OF_MEMORY; res = copy_in_attrs(to_user_ta_ctx(sess->ctx), usr_attrs, attr_count, attrs); if (res != TEE_SUCCESS) goto out; res = tee_svc_cryp_check_attr(ATTR_USAGE_POPULATE, type_props, attrs, attr_count); if (res != TEE_SUCCESS) goto out; res = tee_svc_cryp_obj_populate_type(o, type_props, attrs, attr_count); if (res == TEE_SUCCESS) o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; out: free_wipe(attrs); return res; } TEE_Result syscall_cryp_obj_copy(unsigned long dst, unsigned long src) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_obj *dst_o = NULL; struct tee_obj *src_o = NULL; res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(dst), &dst_o); if (res != TEE_SUCCESS) return res; res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(src), &src_o); if (res != TEE_SUCCESS) return res; if ((src_o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) return TEE_ERROR_BAD_PARAMETERS; if ((dst_o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) return TEE_ERROR_BAD_PARAMETERS; if ((dst_o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) return TEE_ERROR_BAD_PARAMETERS; res = tee_obj_attr_copy_from(dst_o, src_o); if (res != TEE_SUCCESS) return res; dst_o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; dst_o->info.objectSize = src_o->info.objectSize; dst_o->info.objectUsage = src_o->info.objectUsage; return TEE_SUCCESS; } static TEE_Result check_pub_rsa_key(struct bignum *e) { size_t n = crypto_bignum_num_bytes(e); uint8_t bin_key[256 / 8] = { 0 }; /* * NIST SP800-56B requires public RSA key to be an odd integer in * the range 65537 <= e < 2^256. */ if (n > sizeof(bin_key) || n < 3) return TEE_ERROR_BAD_PARAMETERS; crypto_bignum_bn2bin(e, bin_key); if (!(bin_key[n - 1] & 1)) /* key must be odd */ return TEE_ERROR_BAD_PARAMETERS; if (n == 3) { uint32_t key = 0; for (n = 0; n < 3; n++) { key <<= 8; key |= bin_key[n]; } if (key < 65537) return TEE_ERROR_BAD_PARAMETERS; } /* key is larger than 65537 */ return TEE_SUCCESS; } static TEE_Result tee_svc_obj_generate_key_rsa( struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) { TEE_Result res = TEE_SUCCESS; struct rsa_keypair *key = o->attr; uint32_t e = TEE_U32_TO_BIG_ENDIAN(65537); /* Copy the present attributes into the obj before starting */ res = tee_svc_cryp_obj_populate_type(o, type_props, params, param_count); if (res != TEE_SUCCESS) return res; if (get_attribute(o, type_props, TEE_ATTR_RSA_PUBLIC_EXPONENT)) { res = check_pub_rsa_key(key->e); if (res) return res; } else { crypto_bignum_bin2bn((const uint8_t *)&e, sizeof(e), key->e); } res = crypto_acipher_gen_rsa_key(key, key_size); if (res != TEE_SUCCESS) return res; /* Set bits for all known attributes for this object type */ o->have_attrs = (1 << type_props->num_type_attrs) - 1; return TEE_SUCCESS; } static TEE_Result tee_svc_obj_generate_key_dsa( struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) { TEE_Result res; /* Copy the present attributes into the obj before starting */ res = tee_svc_cryp_obj_populate_type(o, type_props, params, param_count); if (res != TEE_SUCCESS) return res; res = crypto_acipher_gen_dsa_key(o->attr, key_size); if (res != TEE_SUCCESS) return res; /* Set bits for all known attributes for this object type */ o->have_attrs = (1 << type_props->num_type_attrs) - 1; return TEE_SUCCESS; } static TEE_Result tee_svc_obj_generate_key_dh( struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) { TEE_Result res; struct dh_keypair *tee_dh_key; struct bignum *dh_q = NULL; uint32_t dh_xbits = 0; /* Copy the present attributes into the obj before starting */ res = tee_svc_cryp_obj_populate_type(o, type_props, params, param_count); if (res != TEE_SUCCESS) return res; tee_dh_key = (struct dh_keypair *)o->attr; if (get_attribute(o, type_props, TEE_ATTR_DH_SUBPRIME)) dh_q = tee_dh_key->q; if (get_attribute(o, type_props, TEE_ATTR_DH_X_BITS)) dh_xbits = tee_dh_key->xbits; res = crypto_acipher_gen_dh_key(tee_dh_key, dh_q, dh_xbits, key_size); if (res != TEE_SUCCESS) return res; /* Set bits for the generated public and private key */ set_attribute(o, type_props, TEE_ATTR_DH_PUBLIC_VALUE); set_attribute(o, type_props, TEE_ATTR_DH_PRIVATE_VALUE); set_attribute(o, type_props, TEE_ATTR_DH_X_BITS); return TEE_SUCCESS; } static TEE_Result tee_svc_obj_generate_key_ecc( struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) { TEE_Result res; struct ecc_keypair *tee_ecc_key; /* Copy the present attributes into the obj before starting */ res = tee_svc_cryp_obj_populate_type(o, type_props, params, param_count); if (res != TEE_SUCCESS) return res; tee_ecc_key = (struct ecc_keypair *)o->attr; res = crypto_acipher_gen_ecc_key(tee_ecc_key, key_size); if (res != TEE_SUCCESS) return res; /* Set bits for the generated public and private key */ set_attribute(o, type_props, TEE_ATTR_ECC_PRIVATE_VALUE); set_attribute(o, type_props, TEE_ATTR_ECC_PUBLIC_VALUE_X); set_attribute(o, type_props, TEE_ATTR_ECC_PUBLIC_VALUE_Y); set_attribute(o, type_props, TEE_ATTR_ECC_CURVE); return TEE_SUCCESS; } static TEE_Result tee_svc_obj_generate_key_x25519(struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) { TEE_Result res = TEE_ERROR_GENERIC; struct x25519_keypair *tee_x25519_key = NULL; /* Copy the present attributes into the obj before starting */ res = tee_svc_cryp_obj_populate_type(o, type_props, params, param_count); if (res != TEE_SUCCESS) return res; tee_x25519_key = (struct x25519_keypair *)o->attr; res = crypto_acipher_gen_x25519_key(tee_x25519_key, key_size); if (res != TEE_SUCCESS) return res; /* Set bits for the generated public and private key */ set_attribute(o, type_props, TEE_ATTR_X25519_PRIVATE_VALUE); set_attribute(o, type_props, TEE_ATTR_X25519_PUBLIC_VALUE); return TEE_SUCCESS; } static TEE_Result tee_svc_obj_generate_key_ed25519(struct tee_obj *o, const struct tee_cryp_obj_type_props *type_props, uint32_t key_size, const TEE_Attribute *params, uint32_t param_count) { TEE_Result res = TEE_ERROR_GENERIC; struct ed25519_keypair *key = NULL; /* Copy the present attributes into the obj before starting */ res = tee_svc_cryp_obj_populate_type(o, type_props, params, param_count); if (res != TEE_SUCCESS) return res; key = o->attr; res = crypto_acipher_gen_ed25519_key(key, key_size); if (res != TEE_SUCCESS) return res; /* Set bits for the generated public and private key */ set_attribute(o, type_props, TEE_ATTR_ED25519_PRIVATE_VALUE); set_attribute(o, type_props, TEE_ATTR_ED25519_PUBLIC_VALUE); return TEE_SUCCESS; } static TEE_Result tee_svc_obj_ed25519_parse_params(const TEE_Attribute *params, size_t num_params, bool *ph_flag, const uint8_t **ctx, size_t *ctx_len) { size_t n = 0; *ctx = NULL; for (n = 0; n < num_params; n++) { switch (params[n].attributeID) { case TEE_ATTR_EDDSA_PREHASH: if (params[n].content.value.b) return TEE_ERROR_BAD_PARAMETERS; if (!params[n].content.value.a) *ph_flag = false; else if (params[n].content.value.a == 1) *ph_flag = true; else return TEE_ERROR_BAD_PARAMETERS; break; case TEE_ATTR_EDDSA_CTX: /* several provided contexts are treated as error */ if (*ctx) return TEE_ERROR_BAD_PARAMETERS; *ctx_len = params[n].content.ref.length; if (*ctx_len > TEE_ED25519_CTX_MAX_LENGTH) return TEE_ERROR_BAD_PARAMETERS; if (!*ctx_len) break; *ctx = params[n].content.ref.buffer; if (!*ctx) return TEE_ERROR_BAD_PARAMETERS; break; default: return TEE_ERROR_BAD_PARAMETERS; } } return TEE_SUCCESS; } static TEE_Result tee_svc_obj_ed25519_sign(struct ed25519_keypair *key, const uint8_t *msg, size_t msg_len, uint8_t *sig, size_t *sig_len, const TEE_Attribute *params, size_t num_params) { TEE_Result err = TEE_ERROR_GENERIC; size_t ctx_len = 0; const uint8_t *ctx = NULL; bool ph_flag = false; err = tee_svc_obj_ed25519_parse_params(params, num_params, &ph_flag, &ctx, &ctx_len); if (err != TEE_SUCCESS) return err; if (ph_flag || ctx) { return crypto_acipher_ed25519ctx_sign(key, msg, msg_len, sig, sig_len, ph_flag, ctx, ctx_len); } return crypto_acipher_ed25519_sign(key, msg, msg_len, sig, sig_len); } static TEE_Result tee_svc_obj_ed25519_verify(struct ed25519_keypair *key, const uint8_t *msg, size_t msg_len, const uint8_t *sig, size_t sig_len, const TEE_Attribute *params, size_t num_params) { TEE_Result err = TEE_ERROR_GENERIC; size_t ctx_len = 0; const uint8_t *ctx = NULL; bool ph_flag = false; err = tee_svc_obj_ed25519_parse_params(params, num_params, &ph_flag, &ctx, &ctx_len); if (err) return err; if (ph_flag || ctx) { return crypto_acipher_ed25519ctx_verify(key, msg, msg_len, sig, sig_len, ph_flag, ctx, ctx_len); } return crypto_acipher_ed25519_verify(key, msg, msg_len, sig, sig_len); } TEE_Result syscall_obj_generate_key(unsigned long obj, unsigned long key_size, const struct utee_attribute *usr_params, unsigned long param_count) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; const struct tee_cryp_obj_type_props *type_props = NULL; struct tee_obj *o = NULL; struct tee_cryp_obj_secret *key = NULL; size_t byte_size = 0; TEE_Attribute *params = NULL; size_t alloc_size = 0; res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); if (res != TEE_SUCCESS) return res; /* Must be a transient object */ if ((o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT) != 0) return TEE_ERROR_BAD_STATE; /* Must not be initialized already */ if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) != 0) return TEE_ERROR_BAD_STATE; /* Find description of object */ type_props = tee_svc_find_type_props(o->info.objectType); if (!type_props) return TEE_ERROR_NOT_SUPPORTED; /* Check that key_size follows restrictions */ res = check_key_size(type_props, key_size); if (res) return res; if (MUL_OVERFLOW(sizeof(TEE_Attribute), param_count, &alloc_size)) return TEE_ERROR_OVERFLOW; params = malloc(alloc_size); if (!params) return TEE_ERROR_OUT_OF_MEMORY; res = copy_in_attrs(to_user_ta_ctx(sess->ctx), usr_params, param_count, params); if (res != TEE_SUCCESS) goto out; res = tee_svc_cryp_check_attr(ATTR_USAGE_GENERATE_KEY, type_props, params, param_count); if (res != TEE_SUCCESS) goto out; switch (o->info.objectType) { case TEE_TYPE_AES: case TEE_TYPE_DES: case TEE_TYPE_DES3: case TEE_TYPE_SM4: case TEE_TYPE_HMAC_MD5: case TEE_TYPE_HMAC_SHA1: case TEE_TYPE_HMAC_SHA224: case TEE_TYPE_HMAC_SHA256: case TEE_TYPE_HMAC_SHA384: case TEE_TYPE_HMAC_SHA512: case TEE_TYPE_HMAC_SM3: case TEE_TYPE_GENERIC_SECRET: byte_size = key_size / 8; /* * In GP Internal API Specification 1.0 the partity bits * aren't counted when telling the size of the key in bits. */ if (is_gp_legacy_des_key_size(o->info.objectType, key_size)) byte_size = (key_size + key_size / 7) / 8; key = (struct tee_cryp_obj_secret *)o->attr; if (byte_size > key->alloc_size) { res = TEE_ERROR_EXCESS_DATA; goto out; } res = crypto_rng_read((void *)(key + 1), byte_size); if (res != TEE_SUCCESS) goto out; key->key_size = byte_size; /* Set bits for all known attributes for this object type */ o->have_attrs = (1 << type_props->num_type_attrs) - 1; break; case TEE_TYPE_RSA_KEYPAIR: res = tee_svc_obj_generate_key_rsa(o, type_props, key_size, params, param_count); if (res != TEE_SUCCESS) goto out; break; case TEE_TYPE_DSA_KEYPAIR: res = tee_svc_obj_generate_key_dsa(o, type_props, key_size, params, param_count); if (res != TEE_SUCCESS) goto out; break; case TEE_TYPE_DH_KEYPAIR: res = tee_svc_obj_generate_key_dh(o, type_props, key_size, params, param_count); if (res != TEE_SUCCESS) goto out; break; case TEE_TYPE_ECDSA_KEYPAIR: case TEE_TYPE_ECDH_KEYPAIR: case TEE_TYPE_SM2_DSA_KEYPAIR: case TEE_TYPE_SM2_KEP_KEYPAIR: case TEE_TYPE_SM2_PKE_KEYPAIR: res = tee_svc_obj_generate_key_ecc(o, type_props, key_size, params, param_count); if (res != TEE_SUCCESS) goto out; break; case TEE_TYPE_X25519_KEYPAIR: res = tee_svc_obj_generate_key_x25519(o, type_props, key_size, params, param_count); if (res != TEE_SUCCESS) goto out; break; case TEE_TYPE_ED25519_KEYPAIR: res = tee_svc_obj_generate_key_ed25519(o, type_props, key_size, params, param_count); if (res != TEE_SUCCESS) goto out; break; default: res = TEE_ERROR_BAD_FORMAT; } out: free_wipe(params); if (res == TEE_SUCCESS) { o->info.objectSize = key_size; o->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; } return res; } static TEE_Result tee_svc_cryp_get_state(struct ts_session *sess, vaddr_t state_id, struct tee_cryp_state **state) { struct tee_cryp_state *s; struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); TAILQ_FOREACH(s, &utc->cryp_states, link) { if (state_id == (vaddr_t)s) { *state = s; return TEE_SUCCESS; } } return TEE_ERROR_BAD_PARAMETERS; } static void cryp_state_free(struct user_ta_ctx *utc, struct tee_cryp_state *cs) { struct tee_obj *o; if (tee_obj_get(utc, cs->key1, &o) == TEE_SUCCESS) tee_obj_close(utc, o); if (tee_obj_get(utc, cs->key2, &o) == TEE_SUCCESS) tee_obj_close(utc, o); TAILQ_REMOVE(&utc->cryp_states, cs, link); if (cs->ctx_finalize != NULL) cs->ctx_finalize(cs->ctx); switch (TEE_ALG_GET_CLASS(cs->algo)) { case TEE_OPERATION_CIPHER: crypto_cipher_free_ctx(cs->ctx); break; case TEE_OPERATION_AE: crypto_authenc_free_ctx(cs->ctx); break; case TEE_OPERATION_DIGEST: crypto_hash_free_ctx(cs->ctx); break; case TEE_OPERATION_MAC: crypto_mac_free_ctx(cs->ctx); break; default: assert(!cs->ctx); } free(cs); } static TEE_Result tee_svc_cryp_check_key_type(const struct tee_obj *o, uint32_t algo, TEE_OperationMode mode) { uint32_t req_key_type; uint32_t req_key_type2 = 0; switch (TEE_ALG_GET_MAIN_ALG(algo)) { case TEE_MAIN_ALGO_MD5: req_key_type = TEE_TYPE_HMAC_MD5; break; case TEE_MAIN_ALGO_SHA1: req_key_type = TEE_TYPE_HMAC_SHA1; break; case TEE_MAIN_ALGO_SHA224: req_key_type = TEE_TYPE_HMAC_SHA224; break; case TEE_MAIN_ALGO_SHA256: req_key_type = TEE_TYPE_HMAC_SHA256; break; case TEE_MAIN_ALGO_SHA384: req_key_type = TEE_TYPE_HMAC_SHA384; break; case TEE_MAIN_ALGO_SHA512: req_key_type = TEE_TYPE_HMAC_SHA512; break; case TEE_MAIN_ALGO_SM3: req_key_type = TEE_TYPE_HMAC_SM3; break; case TEE_MAIN_ALGO_AES: req_key_type = TEE_TYPE_AES; break; case TEE_MAIN_ALGO_DES: req_key_type = TEE_TYPE_DES; break; case TEE_MAIN_ALGO_DES3: req_key_type = TEE_TYPE_DES3; break; case TEE_MAIN_ALGO_SM4: req_key_type = TEE_TYPE_SM4; break; case TEE_MAIN_ALGO_RSA: req_key_type = TEE_TYPE_RSA_KEYPAIR; if (mode == TEE_MODE_ENCRYPT || mode == TEE_MODE_VERIFY) req_key_type2 = TEE_TYPE_RSA_PUBLIC_KEY; break; case TEE_MAIN_ALGO_DSA: req_key_type = TEE_TYPE_DSA_KEYPAIR; if (mode == TEE_MODE_ENCRYPT || mode == TEE_MODE_VERIFY) req_key_type2 = TEE_TYPE_DSA_PUBLIC_KEY; break; case TEE_MAIN_ALGO_DH: req_key_type = TEE_TYPE_DH_KEYPAIR; break; case TEE_MAIN_ALGO_ECDSA: req_key_type = TEE_TYPE_ECDSA_KEYPAIR; if (mode == TEE_MODE_VERIFY) req_key_type2 = TEE_TYPE_ECDSA_PUBLIC_KEY; break; case TEE_MAIN_ALGO_ECDH: req_key_type = TEE_TYPE_ECDH_KEYPAIR; break; case TEE_MAIN_ALGO_ED25519: req_key_type = TEE_TYPE_ED25519_KEYPAIR; if (mode == TEE_MODE_VERIFY) req_key_type2 = TEE_TYPE_ED25519_PUBLIC_KEY; break; case TEE_MAIN_ALGO_SM2_PKE: if (mode == TEE_MODE_ENCRYPT) req_key_type = TEE_TYPE_SM2_PKE_PUBLIC_KEY; else req_key_type = TEE_TYPE_SM2_PKE_KEYPAIR; break; case TEE_MAIN_ALGO_SM2_DSA_SM3: if (mode == TEE_MODE_VERIFY) req_key_type = TEE_TYPE_SM2_DSA_PUBLIC_KEY; else req_key_type = TEE_TYPE_SM2_DSA_KEYPAIR; break; #if defined(CFG_CRYPTO_SM2_KEP) case TEE_MAIN_ALGO_SM2_KEP: req_key_type = TEE_TYPE_SM2_KEP_KEYPAIR; req_key_type2 = TEE_TYPE_SM2_KEP_PUBLIC_KEY; break; #endif #if defined(CFG_CRYPTO_HKDF) case TEE_MAIN_ALGO_HKDF: req_key_type = TEE_TYPE_HKDF_IKM; break; #endif #if defined(CFG_CRYPTO_CONCAT_KDF) case TEE_MAIN_ALGO_CONCAT_KDF: req_key_type = TEE_TYPE_CONCAT_KDF_Z; break; #endif #if defined(CFG_CRYPTO_PBKDF2) case TEE_MAIN_ALGO_PBKDF2: req_key_type = TEE_TYPE_PBKDF2_PASSWORD; break; #endif case TEE_MAIN_ALGO_X25519: req_key_type = TEE_TYPE_X25519_KEYPAIR; break; default: return TEE_ERROR_BAD_PARAMETERS; } if (req_key_type != o->info.objectType && req_key_type2 != o->info.objectType) return TEE_ERROR_BAD_PARAMETERS; return TEE_SUCCESS; } TEE_Result syscall_cryp_state_alloc(unsigned long algo, unsigned long mode, unsigned long key1, unsigned long key2, uint32_t *state) { struct ts_session *sess = ts_get_current_session(); struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); TEE_Result res = TEE_SUCCESS; struct tee_cryp_state *cs = NULL; struct tee_obj *o1 = NULL; struct tee_obj *o2 = NULL; if (key1 != 0) { res = tee_obj_get(utc, uref_to_vaddr(key1), &o1); if (res != TEE_SUCCESS) return res; if (o1->busy) return TEE_ERROR_BAD_PARAMETERS; res = tee_svc_cryp_check_key_type(o1, algo, mode); if (res != TEE_SUCCESS) return res; } if (key2 != 0) { res = tee_obj_get(utc, uref_to_vaddr(key2), &o2); if (res != TEE_SUCCESS) return res; if (o2->busy) return TEE_ERROR_BAD_PARAMETERS; res = tee_svc_cryp_check_key_type(o2, algo, mode); if (res != TEE_SUCCESS) return res; } cs = calloc(1, sizeof(struct tee_cryp_state)); if (!cs) return TEE_ERROR_OUT_OF_MEMORY; TAILQ_INSERT_TAIL(&utc->cryp_states, cs, link); cs->algo = algo; cs->mode = mode; cs->state = CRYP_STATE_UNINITIALIZED; switch (TEE_ALG_GET_CLASS(algo)) { case TEE_OPERATION_CIPHER: if ((TEE_ALG_GET_CHAIN_MODE(algo) == TEE_CHAIN_MODE_XTS && (key1 == 0 || key2 == 0)) || (TEE_ALG_GET_CHAIN_MODE(algo) != TEE_CHAIN_MODE_XTS && (key1 == 0 || key2 != 0))) { res = TEE_ERROR_BAD_PARAMETERS; } else { res = crypto_cipher_alloc_ctx(&cs->ctx, algo); if (res != TEE_SUCCESS) break; } break; case TEE_OPERATION_AE: if (key1 == 0 || key2 != 0) { res = TEE_ERROR_BAD_PARAMETERS; } else { res = crypto_authenc_alloc_ctx(&cs->ctx, algo); if (res != TEE_SUCCESS) break; } break; case TEE_OPERATION_MAC: if (key1 == 0 || key2 != 0) { res = TEE_ERROR_BAD_PARAMETERS; } else { res = crypto_mac_alloc_ctx(&cs->ctx, algo); if (res != TEE_SUCCESS) break; } break; case TEE_OPERATION_DIGEST: if (key1 != 0 || key2 != 0) { res = TEE_ERROR_BAD_PARAMETERS; } else { res = crypto_hash_alloc_ctx(&cs->ctx, algo); if (res != TEE_SUCCESS) break; } break; case TEE_OPERATION_ASYMMETRIC_CIPHER: case TEE_OPERATION_ASYMMETRIC_SIGNATURE: if (algo == TEE_ALG_RSASSA_PKCS1_V1_5 && !IS_ENABLED(CFG_CRYPTO_RSASSA_NA1)) { res = TEE_ERROR_NOT_SUPPORTED; break; } if (key1 == 0 || key2 != 0) res = TEE_ERROR_BAD_PARAMETERS; break; case TEE_OPERATION_KEY_DERIVATION: if (algo == TEE_ALG_SM2_KEP) { if (key1 == 0 || key2 == 0) res = TEE_ERROR_BAD_PARAMETERS; } else { if (key1 == 0 || key2 != 0) res = TEE_ERROR_BAD_PARAMETERS; } break; default: res = TEE_ERROR_NOT_SUPPORTED; break; } if (res != TEE_SUCCESS) goto out; res = copy_kaddr_to_uref(state, cs); if (res != TEE_SUCCESS) goto out; /* Register keys */ if (o1 != NULL) { o1->busy = true; cs->key1 = (vaddr_t)o1; } if (o2 != NULL) { o2->busy = true; cs->key2 = (vaddr_t)o2; } out: if (res != TEE_SUCCESS) cryp_state_free(utc, cs); return res; } TEE_Result syscall_cryp_state_copy(unsigned long dst, unsigned long src) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_cryp_state *cs_dst = NULL; struct tee_cryp_state *cs_src = NULL; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(dst), &cs_dst); if (res != TEE_SUCCESS) return res; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(src), &cs_src); if (res != TEE_SUCCESS) return res; if (cs_dst->algo != cs_src->algo || cs_dst->mode != cs_src->mode) return TEE_ERROR_BAD_PARAMETERS; switch (TEE_ALG_GET_CLASS(cs_src->algo)) { case TEE_OPERATION_CIPHER: crypto_cipher_copy_state(cs_dst->ctx, cs_src->ctx); break; case TEE_OPERATION_AE: crypto_authenc_copy_state(cs_dst->ctx, cs_src->ctx); break; case TEE_OPERATION_DIGEST: crypto_hash_copy_state(cs_dst->ctx, cs_src->ctx); break; case TEE_OPERATION_MAC: crypto_mac_copy_state(cs_dst->ctx, cs_src->ctx); break; default: return TEE_ERROR_BAD_STATE; } cs_dst->state = cs_src->state; cs_dst->ctx_finalize = cs_src->ctx_finalize; return TEE_SUCCESS; } void tee_svc_cryp_free_states(struct user_ta_ctx *utc) { struct tee_cryp_state_head *states = &utc->cryp_states; while (!TAILQ_EMPTY(states)) cryp_state_free(utc, TAILQ_FIRST(states)); } TEE_Result syscall_cryp_state_free(unsigned long state) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_cryp_state *cs = NULL; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; cryp_state_free(to_user_ta_ctx(sess->ctx), cs); return TEE_SUCCESS; } TEE_Result syscall_hash_init(unsigned long state, const void *iv __maybe_unused, size_t iv_len __maybe_unused) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_cryp_state *cs = NULL; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; switch (TEE_ALG_GET_CLASS(cs->algo)) { case TEE_OPERATION_DIGEST: res = crypto_hash_init(cs->ctx); if (res != TEE_SUCCESS) return res; break; case TEE_OPERATION_MAC: { struct tee_obj *o; struct tee_cryp_obj_secret *key; res = tee_obj_get(to_user_ta_ctx(sess->ctx), cs->key1, &o); if (res != TEE_SUCCESS) return res; if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) return TEE_ERROR_BAD_PARAMETERS; key = (struct tee_cryp_obj_secret *)o->attr; res = crypto_mac_init(cs->ctx, (void *)(key + 1), key->key_size); if (res != TEE_SUCCESS) return res; break; } default: return TEE_ERROR_BAD_PARAMETERS; } cs->state = CRYP_STATE_INITIALIZED; return TEE_SUCCESS; } TEE_Result syscall_hash_update(unsigned long state, const void *chunk, size_t chunk_size) { struct ts_session *sess = ts_get_current_session(); struct tee_cryp_state *cs = NULL; TEE_Result res = TEE_SUCCESS; /* No data, but size provided isn't valid parameters. */ if (!chunk && chunk_size) return TEE_ERROR_BAD_PARAMETERS; /* Zero length hash is valid, but nothing we need to do. */ if (!chunk_size) return TEE_SUCCESS; chunk = memtag_strip_tag_const(chunk); res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)chunk, chunk_size); if (res != TEE_SUCCESS) return res; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; if (cs->state != CRYP_STATE_INITIALIZED) return TEE_ERROR_BAD_STATE; switch (TEE_ALG_GET_CLASS(cs->algo)) { case TEE_OPERATION_DIGEST: res = crypto_hash_update(cs->ctx, chunk, chunk_size); if (res != TEE_SUCCESS) return res; break; case TEE_OPERATION_MAC: res = crypto_mac_update(cs->ctx, chunk, chunk_size); if (res != TEE_SUCCESS) return res; break; default: return TEE_ERROR_BAD_PARAMETERS; } return TEE_SUCCESS; } TEE_Result syscall_hash_final(unsigned long state, const void *chunk, size_t chunk_size, void *hash, uint64_t *hash_len) { struct ts_session *sess = ts_get_current_session(); struct tee_cryp_state *cs = NULL; TEE_Result res2 = TEE_SUCCESS; TEE_Result res = TEE_SUCCESS; size_t hash_size = 0; size_t hlen = 0; /* No data, but size provided isn't valid parameters. */ if (!chunk && chunk_size) return TEE_ERROR_BAD_PARAMETERS; chunk = memtag_strip_tag_const(chunk); hash = memtag_strip_tag(hash); res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)chunk, chunk_size); if (res != TEE_SUCCESS) return res; res = get_user_u64_as_size_t(&hlen, hash_len); if (res != TEE_SUCCESS) return res; res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_WRITE | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)hash, hlen); if (res != TEE_SUCCESS) return res; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; if (cs->state != CRYP_STATE_INITIALIZED) return TEE_ERROR_BAD_STATE; switch (TEE_ALG_GET_CLASS(cs->algo)) { case TEE_OPERATION_DIGEST: res = tee_alg_get_digest_size(cs->algo, &hash_size); if (res != TEE_SUCCESS) return res; if (hlen < hash_size) { res = TEE_ERROR_SHORT_BUFFER; goto out; } if (chunk_size) { res = crypto_hash_update(cs->ctx, chunk, chunk_size); if (res != TEE_SUCCESS) return res; } res = crypto_hash_final(cs->ctx, hash, hash_size); if (res != TEE_SUCCESS) return res; break; case TEE_OPERATION_MAC: res = tee_alg_get_digest_size(cs->algo, &hash_size); if (res != TEE_SUCCESS) return res; if (hlen < hash_size) { res = TEE_ERROR_SHORT_BUFFER; goto out; } if (chunk_size) { res = crypto_mac_update(cs->ctx, chunk, chunk_size); if (res != TEE_SUCCESS) return res; } res = crypto_mac_final(cs->ctx, hash, hash_size); if (res != TEE_SUCCESS) return res; break; default: return TEE_ERROR_BAD_PARAMETERS; } out: res2 = put_user_u64(hash_len, hash_size); if (res2 != TEE_SUCCESS) return res2; return res; } TEE_Result syscall_cipher_init(unsigned long state, const void *iv, size_t iv_len) { struct ts_session *sess = ts_get_current_session(); struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); struct tee_cryp_obj_secret *key1 = NULL; struct tee_cryp_state *cs = NULL; TEE_Result res = TEE_SUCCESS; struct tee_obj *o = NULL; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_CIPHER) return TEE_ERROR_BAD_STATE; iv = memtag_strip_tag_const(iv); res = vm_check_access_rights(&utc->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)iv, iv_len); if (res != TEE_SUCCESS) return res; res = tee_obj_get(utc, cs->key1, &o); if (res != TEE_SUCCESS) return res; if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) return TEE_ERROR_BAD_PARAMETERS; key1 = o->attr; if (tee_obj_get(utc, cs->key2, &o) == TEE_SUCCESS) { struct tee_cryp_obj_secret *key2 = o->attr; if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) return TEE_ERROR_BAD_PARAMETERS; res = crypto_cipher_init(cs->ctx, cs->mode, (uint8_t *)(key1 + 1), key1->key_size, (uint8_t *)(key2 + 1), key2->key_size, iv, iv_len); } else { res = crypto_cipher_init(cs->ctx, cs->mode, (uint8_t *)(key1 + 1), key1->key_size, NULL, 0, iv, iv_len); } if (res != TEE_SUCCESS) return res; cs->ctx_finalize = crypto_cipher_final; cs->state = CRYP_STATE_INITIALIZED; return TEE_SUCCESS; } static TEE_Result tee_svc_cipher_update_helper(unsigned long state, bool last_block, const void *src, size_t src_len, void *dst, uint64_t *dst_len) { struct ts_session *sess = ts_get_current_session(); struct tee_cryp_state *cs = NULL; TEE_Result res = TEE_SUCCESS; size_t dlen = 0; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; if (cs->state != CRYP_STATE_INITIALIZED) return TEE_ERROR_BAD_STATE; src = memtag_strip_tag_const(src); dst = memtag_strip_tag(dst); res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)src, src_len); if (res != TEE_SUCCESS) return res; if (!dst_len) { dlen = 0; } else { struct user_mode_ctx *uctx = &to_user_ta_ctx(sess->ctx)->uctx; uint32_t flags = TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_WRITE | TEE_MEMORY_ACCESS_ANY_OWNER; res = get_user_u64_as_size_t(&dlen, dst_len); if (res != TEE_SUCCESS) return res; res = vm_check_access_rights(uctx, flags, (uaddr_t)dst, dlen); if (res != TEE_SUCCESS) return res; } if (dlen < src_len) { res = TEE_ERROR_SHORT_BUFFER; goto out; } if (src_len > 0) { /* Permit src_len == 0 to finalize the operation */ res = tee_do_cipher_update(cs->ctx, cs->algo, cs->mode, last_block, src, src_len, dst); } if (last_block && cs->ctx_finalize != NULL) { cs->ctx_finalize(cs->ctx); cs->ctx_finalize = NULL; } out: if ((res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) && dst_len != NULL) { TEE_Result res2; res2 = put_user_u64(dst_len, src_len); if (res2 != TEE_SUCCESS) res = res2; } return res; } TEE_Result syscall_cipher_update(unsigned long state, const void *src, size_t src_len, void *dst, uint64_t *dst_len) { return tee_svc_cipher_update_helper(state, false /* last_block */, src, src_len, dst, dst_len); } TEE_Result syscall_cipher_final(unsigned long state, const void *src, size_t src_len, void *dst, uint64_t *dst_len) { return tee_svc_cipher_update_helper(state, true /* last_block */, src, src_len, dst, dst_len); } #if defined(CFG_CRYPTO_HKDF) static TEE_Result get_hkdf_params(const TEE_Attribute *params, uint32_t param_count, void **salt, size_t *salt_len, void **info, size_t *info_len, size_t *okm_len) { size_t n; enum { SALT = 0x1, LENGTH = 0x2, INFO = 0x4 }; uint8_t found = 0; *salt = *info = NULL; *salt_len = *info_len = *okm_len = 0; for (n = 0; n < param_count; n++) { switch (params[n].attributeID) { case TEE_ATTR_HKDF_SALT: if (!(found & SALT)) { *salt = params[n].content.ref.buffer; *salt_len = params[n].content.ref.length; found |= SALT; } break; case TEE_ATTR_HKDF_OKM_LENGTH: if (!(found & LENGTH)) { *okm_len = params[n].content.value.a; found |= LENGTH; } break; case TEE_ATTR_HKDF_INFO: if (!(found & INFO)) { *info = params[n].content.ref.buffer; *info_len = params[n].content.ref.length; found |= INFO; } break; default: /* Unexpected attribute */ return TEE_ERROR_BAD_PARAMETERS; } } if (!(found & LENGTH)) return TEE_ERROR_BAD_PARAMETERS; return TEE_SUCCESS; } #endif #if defined(CFG_CRYPTO_CONCAT_KDF) static TEE_Result get_concat_kdf_params(const TEE_Attribute *params, uint32_t param_count, void **other_info, size_t *other_info_len, size_t *derived_key_len) { size_t n; enum { LENGTH = 0x1, INFO = 0x2 }; uint8_t found = 0; *other_info = NULL; *other_info_len = *derived_key_len = 0; for (n = 0; n < param_count; n++) { switch (params[n].attributeID) { case TEE_ATTR_CONCAT_KDF_OTHER_INFO: if (!(found & INFO)) { *other_info = params[n].content.ref.buffer; *other_info_len = params[n].content.ref.length; found |= INFO; } break; case TEE_ATTR_CONCAT_KDF_DKM_LENGTH: if (!(found & LENGTH)) { *derived_key_len = params[n].content.value.a; found |= LENGTH; } break; default: /* Unexpected attribute */ return TEE_ERROR_BAD_PARAMETERS; } } if (!(found & LENGTH)) return TEE_ERROR_BAD_PARAMETERS; return TEE_SUCCESS; } #endif #if defined(CFG_CRYPTO_PBKDF2) static TEE_Result get_pbkdf2_params(const TEE_Attribute *params, uint32_t param_count, void **salt, size_t *salt_len, size_t *derived_key_len, size_t *iteration_count) { size_t n; enum { SALT = 0x1, LENGTH = 0x2, COUNT = 0x4 }; uint8_t found = 0; *salt = NULL; *salt_len = *derived_key_len = *iteration_count = 0; for (n = 0; n < param_count; n++) { switch (params[n].attributeID) { case TEE_ATTR_PBKDF2_SALT: if (!(found & SALT)) { *salt = params[n].content.ref.buffer; *salt_len = params[n].content.ref.length; found |= SALT; } break; case TEE_ATTR_PBKDF2_DKM_LENGTH: if (!(found & LENGTH)) { *derived_key_len = params[n].content.value.a; found |= LENGTH; } break; case TEE_ATTR_PBKDF2_ITERATION_COUNT: if (!(found & COUNT)) { *iteration_count = params[n].content.value.a; found |= COUNT; } break; default: /* Unexpected attribute */ return TEE_ERROR_BAD_PARAMETERS; } } if ((found & (LENGTH|COUNT)) != (LENGTH|COUNT)) return TEE_ERROR_BAD_PARAMETERS; return TEE_SUCCESS; } #endif #if defined(CFG_CRYPTO_SM2_KEP) static TEE_Result get_sm2_kep_params(const TEE_Attribute *params, uint32_t param_count, struct ecc_public_key *peer_key, struct ecc_public_key *peer_eph_key, struct sm2_kep_parms *kep_parms) { TEE_Result res = TEE_ERROR_GENERIC; size_t n; enum { IS_INITIATOR, PEER_KEY_X, PEER_KEY_Y, PEER_EPH_KEY_X, PEER_EPH_KEY_Y, INITIATOR_ID, RESPONDER_ID, }; uint8_t mandatory = BIT(IS_INITIATOR) | BIT(PEER_KEY_X) | BIT(PEER_KEY_Y) | BIT(PEER_EPH_KEY_X) | BIT(PEER_EPH_KEY_Y) | BIT(INITIATOR_ID) | BIT(RESPONDER_ID); uint8_t found = 0; res = crypto_acipher_alloc_ecc_public_key(peer_key, TEE_TYPE_SM2_KEP_PUBLIC_KEY, 256); if (res) return res; res = crypto_acipher_alloc_ecc_public_key(peer_eph_key, TEE_TYPE_SM2_KEP_PUBLIC_KEY, 256); if (res) goto out_p; peer_key->curve = TEE_ECC_CURVE_SM2; peer_eph_key->curve = TEE_ECC_CURVE_SM2; for (n = 0; n < param_count; n++) { const TEE_Attribute *p = ¶ms[n]; switch (p->attributeID) { case TEE_ATTR_SM2_KEP_USER: kep_parms->is_initiator = !p->content.value.a; found |= BIT(IS_INITIATOR); break; case TEE_ATTR_ECC_PUBLIC_VALUE_X: crypto_bignum_bin2bn(p->content.ref.buffer, p->content.ref.length, peer_key->x); found |= BIT(PEER_KEY_X); break; case TEE_ATTR_ECC_PUBLIC_VALUE_Y: crypto_bignum_bin2bn(p->content.ref.buffer, p->content.ref.length, peer_key->y); found |= BIT(PEER_KEY_Y); break; case __OPTEE_SM2_KEP_ATTR_ECC_EPHEMERAL_PUBLIC_VALUE_X: case TEE_ATTR_ECC_EPHEMERAL_PUBLIC_VALUE_X: crypto_bignum_bin2bn(p->content.ref.buffer, p->content.ref.length, peer_eph_key->x); found |= BIT(PEER_EPH_KEY_X); break; case __OPTEE_SM2_KEP_ATTR_ECC_EPHEMERAL_PUBLIC_VALUE_Y: case TEE_ATTR_ECC_EPHEMERAL_PUBLIC_VALUE_Y: crypto_bignum_bin2bn(p->content.ref.buffer, p->content.ref.length, peer_eph_key->y); found |= BIT(PEER_EPH_KEY_Y); break; case TEE_ATTR_SM2_ID_INITIATOR: kep_parms->initiator_id = p->content.ref.buffer; kep_parms->initiator_id_len = p->content.ref.length; found |= BIT(INITIATOR_ID); break; case TEE_ATTR_SM2_ID_RESPONDER: kep_parms->responder_id = p->content.ref.buffer; kep_parms->responder_id_len = p->content.ref.length; found |= BIT(RESPONDER_ID); break; case TEE_ATTR_SM2_KEP_CONFIRMATION_IN: kep_parms->conf_in = p->content.ref.buffer; kep_parms->conf_in_len = p->content.ref.length; break; case TEE_ATTR_SM2_KEP_CONFIRMATION_OUT: kep_parms->conf_out = p->content.ref.buffer; kep_parms->conf_out_len = p->content.ref.length; break; default: /* Unexpected attribute */ res = TEE_ERROR_BAD_PARAMETERS; goto out; } } if ((found & mandatory) != mandatory) { res = TEE_ERROR_BAD_PARAMETERS; goto out; } return TEE_SUCCESS; out: crypto_acipher_free_ecc_public_key(peer_eph_key); out_p: crypto_acipher_free_ecc_public_key(peer_key); return res; } #endif TEE_Result syscall_cryp_derive_key(unsigned long state, const struct utee_attribute *usr_params, unsigned long param_count, unsigned long derived_key) { struct ts_session *sess = ts_get_current_session(); struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); TEE_Result res = TEE_ERROR_NOT_SUPPORTED; struct tee_obj *ko = NULL; struct tee_obj *so = NULL; struct tee_cryp_state *cs = NULL; struct tee_cryp_obj_secret *sk = NULL; const struct tee_cryp_obj_type_props *type_props = NULL; TEE_Attribute *params = NULL; size_t alloc_size = 0; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; if (MUL_OVERFLOW(sizeof(TEE_Attribute), param_count, &alloc_size)) return TEE_ERROR_OVERFLOW; params = malloc(alloc_size); if (!params) return TEE_ERROR_OUT_OF_MEMORY; res = copy_in_attrs(utc, usr_params, param_count, params); if (res != TEE_SUCCESS) goto out; /* Get key set in operation */ res = tee_obj_get(utc, cs->key1, &ko); if (res != TEE_SUCCESS) goto out; res = tee_obj_get(utc, uref_to_vaddr(derived_key), &so); if (res != TEE_SUCCESS) goto out; /* Find information needed about the object to initialize */ sk = so->attr; /* Find description of object */ type_props = tee_svc_find_type_props(so->info.objectType); if (!type_props) { res = TEE_ERROR_NOT_SUPPORTED; goto out; } if (cs->algo == TEE_ALG_DH_DERIVE_SHARED_SECRET) { struct bignum *pub = NULL; struct bignum *ss = NULL; size_t bin_size = 0; if (param_count != 1 || params[0].attributeID != TEE_ATTR_DH_PUBLIC_VALUE) { res = TEE_ERROR_BAD_PARAMETERS; goto out; } bin_size = params[0].content.ref.length; if (MUL_OVERFLOW(bin_size, 8, &alloc_size)) { res = TEE_ERROR_OVERFLOW; goto out; } pub = crypto_bignum_allocate(alloc_size); ss = crypto_bignum_allocate(alloc_size); if (pub && ss) { crypto_bignum_bin2bn(params[0].content.ref.buffer, bin_size, pub); res = crypto_acipher_dh_shared_secret(ko->attr, pub, ss); if (res == TEE_SUCCESS) { sk->key_size = crypto_bignum_num_bytes(ss); crypto_bignum_bn2bin(ss, (uint8_t *)(sk + 1)); so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); } } else { res = TEE_ERROR_OUT_OF_MEMORY; } crypto_bignum_free(pub); crypto_bignum_free(ss); } else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_ECDH) { struct ecc_public_key key_public; uint8_t *pt_secret; unsigned long pt_secret_len; uint32_t key_type = TEE_TYPE_ECDH_PUBLIC_KEY; if (param_count != 2 || params[0].attributeID != TEE_ATTR_ECC_PUBLIC_VALUE_X || params[1].attributeID != TEE_ATTR_ECC_PUBLIC_VALUE_Y) { res = TEE_ERROR_BAD_PARAMETERS; goto out; } switch (cs->algo) { case TEE_ALG_ECDH_P192: alloc_size = 192; break; case TEE_ALG_ECDH_P224: alloc_size = 224; break; case TEE_ALG_ECDH_P256: alloc_size = 256; break; case TEE_ALG_ECDH_P384: alloc_size = 384; break; case TEE_ALG_ECDH_P521: alloc_size = 521; break; default: res = TEE_ERROR_NOT_IMPLEMENTED; goto out; } /* Create the public key */ res = crypto_acipher_alloc_ecc_public_key(&key_public, key_type, alloc_size); if (res != TEE_SUCCESS) goto out; key_public.curve = ((struct ecc_keypair *)ko->attr)->curve; crypto_bignum_bin2bn(params[0].content.ref.buffer, params[0].content.ref.length, key_public.x); crypto_bignum_bin2bn(params[1].content.ref.buffer, params[1].content.ref.length, key_public.y); pt_secret = (uint8_t *)(sk + 1); pt_secret_len = sk->alloc_size; res = crypto_acipher_ecc_shared_secret(ko->attr, &key_public, pt_secret, &pt_secret_len); if (res == TEE_SUCCESS) { sk->key_size = pt_secret_len; so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); } /* free the public key */ crypto_acipher_free_ecc_public_key(&key_public); } #if defined(CFG_CRYPTO_HKDF) else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_HKDF) { void *salt, *info; size_t salt_len, info_len, okm_len; uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); struct tee_cryp_obj_secret *ik = ko->attr; const uint8_t *ikm = (const uint8_t *)(ik + 1); res = get_hkdf_params(params, param_count, &salt, &salt_len, &info, &info_len, &okm_len); if (res != TEE_SUCCESS) goto out; /* Requested size must fit into the output object's buffer */ if (okm_len > ik->alloc_size) { res = TEE_ERROR_BAD_PARAMETERS; goto out; } res = tee_cryp_hkdf(hash_id, ikm, ik->key_size, salt, salt_len, info, info_len, (uint8_t *)(sk + 1), okm_len); if (res == TEE_SUCCESS) { sk->key_size = okm_len; so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); } } #endif #if defined(CFG_CRYPTO_CONCAT_KDF) else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_CONCAT_KDF) { void *info; size_t info_len, derived_key_len; uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); struct tee_cryp_obj_secret *ss = ko->attr; const uint8_t *shared_secret = (const uint8_t *)(ss + 1); res = get_concat_kdf_params(params, param_count, &info, &info_len, &derived_key_len); if (res != TEE_SUCCESS) goto out; /* Requested size must fit into the output object's buffer */ if (derived_key_len > ss->alloc_size) { res = TEE_ERROR_BAD_PARAMETERS; goto out; } res = tee_cryp_concat_kdf(hash_id, shared_secret, ss->key_size, info, info_len, (uint8_t *)(sk + 1), derived_key_len); if (res == TEE_SUCCESS) { sk->key_size = derived_key_len; so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); } } #endif #if defined(CFG_CRYPTO_PBKDF2) else if (TEE_ALG_GET_MAIN_ALG(cs->algo) == TEE_MAIN_ALGO_PBKDF2) { void *salt; size_t salt_len, iteration_count, derived_key_len; uint32_t hash_id = TEE_ALG_GET_DIGEST_HASH(cs->algo); struct tee_cryp_obj_secret *ss = ko->attr; const uint8_t *password = (const uint8_t *)(ss + 1); res = get_pbkdf2_params(params, param_count, &salt, &salt_len, &derived_key_len, &iteration_count); if (res != TEE_SUCCESS) goto out; /* Requested size must fit into the output object's buffer */ if (derived_key_len > ss->alloc_size) { res = TEE_ERROR_BAD_PARAMETERS; goto out; } res = tee_cryp_pbkdf2(hash_id, password, ss->key_size, salt, salt_len, iteration_count, (uint8_t *)(sk + 1), derived_key_len); if (res == TEE_SUCCESS) { sk->key_size = derived_key_len; so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); } } #endif #if defined(CFG_CRYPTO_SM2_KEP) else if (cs->algo == TEE_ALG_SM2_KEP) { struct ecc_public_key peer_eph_key = { }; struct ecc_public_key peer_key = { }; struct sm2_kep_parms kep_parms = { .out = (uint8_t *)(sk + 1), .out_len = so->info.maxObjectSize, }; struct tee_obj *ko2 = NULL; res = tee_obj_get(utc, cs->key2, &ko2); if (res != TEE_SUCCESS) goto out; res = get_sm2_kep_params(params, param_count, &peer_key, &peer_eph_key, &kep_parms); if (res != TEE_SUCCESS) goto out; /* * key1 is our private keypair, key2 is our ephemeral public key */ res = crypto_acipher_sm2_kep_derive(ko->attr, /* key1 */ ko2->attr, /* key2 */ &peer_key, &peer_eph_key, &kep_parms); if (res == TEE_SUCCESS) { sk->key_size = kep_parms.out_len; so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); } crypto_acipher_free_ecc_public_key(&peer_key); crypto_acipher_free_ecc_public_key(&peer_eph_key); } #endif #if defined(CFG_CRYPTO_X25519) else if (cs->algo == TEE_ALG_X25519) { uint8_t *x25519_pub_key = NULL; uint8_t *pt_secret = NULL; unsigned long pt_secret_len = 0; if (param_count != 1 || params[0].attributeID != TEE_ATTR_X25519_PUBLIC_VALUE) { res = TEE_ERROR_BAD_PARAMETERS; goto out; } /* X25519 public key size is 32 bytes */ if (params[0].content.ref.length != KEY_SIZE_BYTES_25519) { res = TEE_ERROR_BAD_PARAMETERS; goto out; } /* Set the public key */ x25519_pub_key = params[0].content.ref.buffer; pt_secret = (uint8_t *)(sk + 1); pt_secret_len = sk->alloc_size; res = crypto_acipher_x25519_shared_secret(ko->attr, x25519_pub_key, pt_secret, &pt_secret_len); if (res == TEE_SUCCESS) { sk->key_size = pt_secret_len; so->info.handleFlags |= TEE_HANDLE_FLAG_INITIALIZED; set_attribute(so, type_props, TEE_ATTR_SECRET_VALUE); } } #endif else res = TEE_ERROR_NOT_SUPPORTED; out: free_wipe(params); return res; } TEE_Result syscall_cryp_random_number_generate(void *buf, size_t blen) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; buf = memtag_strip_tag(buf); res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, TEE_MEMORY_ACCESS_WRITE, (uaddr_t)buf, blen); if (res != TEE_SUCCESS) return res; res = crypto_rng_read(buf, blen); if (res != TEE_SUCCESS) return res; return res; } TEE_Result syscall_authenc_init(unsigned long state, const void *nonce, size_t nonce_len, size_t tag_len, size_t aad_len, size_t payload_len) { struct ts_session *sess = ts_get_current_session(); struct tee_cryp_obj_secret *key = NULL; struct tee_cryp_state *cs = NULL; TEE_Result res = TEE_SUCCESS; struct tee_obj *o = NULL; nonce = memtag_strip_tag_const(nonce); res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)nonce, nonce_len); if (res != TEE_SUCCESS) return res; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; res = tee_obj_get(to_user_ta_ctx(sess->ctx), cs->key1, &o); if (res != TEE_SUCCESS) return res; if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) return TEE_ERROR_BAD_PARAMETERS; key = o->attr; res = crypto_authenc_init(cs->ctx, cs->mode, (uint8_t *)(key + 1), key->key_size, nonce, nonce_len, tag_len, aad_len, payload_len); if (res != TEE_SUCCESS) return res; cs->ctx_finalize = crypto_authenc_final; cs->state = CRYP_STATE_INITIALIZED; return TEE_SUCCESS; } TEE_Result syscall_authenc_update_aad(unsigned long state, const void *aad_data, size_t aad_data_len) { struct ts_session *sess = ts_get_current_session(); TEE_Result res = TEE_SUCCESS; struct tee_cryp_state *cs = NULL; aad_data = memtag_strip_tag_const(aad_data); res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)aad_data, aad_data_len); if (res != TEE_SUCCESS) return res; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; if (cs->state != CRYP_STATE_INITIALIZED) return TEE_ERROR_BAD_STATE; if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) return TEE_ERROR_BAD_STATE; res = crypto_authenc_update_aad(cs->ctx, cs->mode, aad_data, aad_data_len); if (res != TEE_SUCCESS) return res; return TEE_SUCCESS; } TEE_Result syscall_authenc_update_payload(unsigned long state, const void *src_data, size_t src_len, void *dst_data, uint64_t *dst_len) { struct ts_session *sess = ts_get_current_session(); struct tee_cryp_state *cs = NULL; TEE_Result res = TEE_SUCCESS; size_t dlen = 0; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; if (cs->state != CRYP_STATE_INITIALIZED) return TEE_ERROR_BAD_STATE; if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) return TEE_ERROR_BAD_STATE; src_data = memtag_strip_tag_const(src_data); dst_data = memtag_strip_tag(dst_data); res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)src_data, src_len); if (res != TEE_SUCCESS) return res; res = get_user_u64_as_size_t(&dlen, dst_len); if (res != TEE_SUCCESS) return res; res = vm_check_access_rights(&to_user_ta_ctx(sess->ctx)->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_WRITE | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)dst_data, dlen); if (res != TEE_SUCCESS) return res; if (dlen < src_len) { res = TEE_ERROR_SHORT_BUFFER; goto out; } res = crypto_authenc_update_payload(cs->ctx, cs->mode, src_data, src_len, dst_data, &dlen); out: if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { TEE_Result res2 = put_user_u64(dst_len, dlen); if (res2 != TEE_SUCCESS) res = res2; } return res; } TEE_Result syscall_authenc_enc_final(unsigned long state, const void *src_data, size_t src_len, void *dst_data, uint64_t *dst_len, void *tag, uint64_t *tag_len) { struct ts_session *sess = ts_get_current_session(); struct user_mode_ctx *uctx = &to_user_ta_ctx(sess->ctx)->uctx; struct tee_cryp_state *cs = NULL; TEE_Result res = TEE_SUCCESS; size_t dlen = 0; size_t tlen = 0; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; if (cs->state != CRYP_STATE_INITIALIZED) return TEE_ERROR_BAD_STATE; if (cs->mode != TEE_MODE_ENCRYPT) return TEE_ERROR_BAD_PARAMETERS; if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) return TEE_ERROR_BAD_STATE; src_data = memtag_strip_tag_const(src_data); dst_data = memtag_strip_tag(dst_data); tag = memtag_strip_tag(tag); res = vm_check_access_rights(uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)src_data, src_len); if (res != TEE_SUCCESS) return res; if (!dst_len) { dlen = 0; } else { res = get_user_u64_as_size_t(&dlen, dst_len); if (res != TEE_SUCCESS) return res; res = vm_check_access_rights(uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_WRITE | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)dst_data, dlen); if (res != TEE_SUCCESS) return res; } if (dlen < src_len) { res = TEE_ERROR_SHORT_BUFFER; goto out; } res = get_user_u64_as_size_t(&tlen, tag_len); if (res != TEE_SUCCESS) return res; res = vm_check_access_rights(uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_WRITE | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)tag, tlen); if (res != TEE_SUCCESS) return res; res = crypto_authenc_enc_final(cs->ctx, src_data, src_len, dst_data, &dlen, tag, &tlen); out: if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { TEE_Result res2 = TEE_SUCCESS; if (dst_len != NULL) { res2 = put_user_u64(dst_len, dlen); if (res2 != TEE_SUCCESS) return res2; } res2 = put_user_u64(tag_len, tlen); if (res2 != TEE_SUCCESS) return res2; } return res; } TEE_Result syscall_authenc_dec_final(unsigned long state, const void *src_data, size_t src_len, void *dst_data, uint64_t *dst_len, const void *tag, size_t tag_len) { struct ts_session *sess = ts_get_current_session(); struct user_mode_ctx *uctx = &to_user_ta_ctx(sess->ctx)->uctx; struct tee_cryp_state *cs = NULL; TEE_Result res = TEE_SUCCESS; size_t dlen = 0; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; if (cs->state != CRYP_STATE_INITIALIZED) return TEE_ERROR_BAD_STATE; if (cs->mode != TEE_MODE_DECRYPT) return TEE_ERROR_BAD_PARAMETERS; if (TEE_ALG_GET_CLASS(cs->algo) != TEE_OPERATION_AE) return TEE_ERROR_BAD_STATE; src_data = memtag_strip_tag_const(src_data); dst_data = memtag_strip_tag(dst_data); tag = memtag_strip_tag_const(tag); res = vm_check_access_rights(uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)src_data, src_len); if (res != TEE_SUCCESS) return res; if (!dst_len) { dlen = 0; } else { res = get_user_u64_as_size_t(&dlen, dst_len); if (res != TEE_SUCCESS) return res; res = vm_check_access_rights(uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_WRITE | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)dst_data, dlen); if (res != TEE_SUCCESS) return res; } if (dlen < src_len) { res = TEE_ERROR_SHORT_BUFFER; goto out; } res = vm_check_access_rights(uctx, TEE_MEMORY_ACCESS_READ, (uaddr_t)tag, tag_len); if (res != TEE_SUCCESS) return res; res = crypto_authenc_dec_final(cs->ctx, src_data, src_len, dst_data, &dlen, tag, tag_len); out: if ((res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) && dst_len != NULL) { TEE_Result res2 = put_user_u64(dst_len, dlen); if (res2 != TEE_SUCCESS) return res2; } return res; } static int pkcs1_get_salt_len(const TEE_Attribute *params, uint32_t num_params, size_t default_len) { size_t n; assert(default_len < INT_MAX); for (n = 0; n < num_params; n++) { if (params[n].attributeID == TEE_ATTR_RSA_PSS_SALT_LENGTH) { if (params[n].content.value.a < INT_MAX) return params[n].content.value.a; break; } } /* * If salt length isn't provided use the default value which is * the length of the digest. */ return default_len; } TEE_Result syscall_asymm_operate(unsigned long state, const struct utee_attribute *usr_params, size_t num_params, const void *src_data, size_t src_len, void *dst_data, uint64_t *dst_len) { struct ts_session *sess = ts_get_current_session(); struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); TEE_Result res = TEE_SUCCESS; struct tee_cryp_state *cs = NULL; size_t dlen = 0; struct tee_obj *o = NULL; void *label = NULL; size_t label_len = 0; size_t n = 0; int salt_len = 0; TEE_Attribute *params = NULL; size_t alloc_size = 0; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; src_data = memtag_strip_tag_const(src_data); dst_data = memtag_strip_tag(dst_data); res = vm_check_access_rights(&utc->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)src_data, src_len); if (res != TEE_SUCCESS) return res; res = get_user_u64_as_size_t(&dlen, dst_len); if (res != TEE_SUCCESS) return res; res = vm_check_access_rights(&utc->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_WRITE | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)dst_data, dlen); if (res != TEE_SUCCESS) return res; if (MUL_OVERFLOW(sizeof(TEE_Attribute), num_params, &alloc_size)) return TEE_ERROR_OVERFLOW; params = malloc(alloc_size); if (!params) return TEE_ERROR_OUT_OF_MEMORY; res = copy_in_attrs(utc, usr_params, num_params, params); if (res != TEE_SUCCESS) goto out; res = tee_obj_get(utc, cs->key1, &o); if (res != TEE_SUCCESS) goto out; if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) { res = TEE_ERROR_GENERIC; goto out; } switch (cs->algo) { case TEE_ALG_RSA_NOPAD: if (cs->mode == TEE_MODE_ENCRYPT) { res = crypto_acipher_rsanopad_encrypt(o->attr, src_data, src_len, dst_data, &dlen); } else if (cs->mode == TEE_MODE_DECRYPT) { res = crypto_acipher_rsanopad_decrypt(o->attr, src_data, src_len, dst_data, &dlen); } else { /* * We will panic because "the mode is not compatible * with the function" */ res = TEE_ERROR_GENERIC; } break; case TEE_ALG_SM2_PKE: if (cs->mode == TEE_MODE_ENCRYPT) { res = crypto_acipher_sm2_pke_encrypt(o->attr, src_data, src_len, dst_data, &dlen); } else if (cs->mode == TEE_MODE_DECRYPT) { res = crypto_acipher_sm2_pke_decrypt(o->attr, src_data, src_len, dst_data, &dlen); } else { res = TEE_ERROR_GENERIC; } break; case TEE_ALG_RSAES_PKCS1_V1_5: case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA1: case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA224: case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA256: case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA384: case TEE_ALG_RSAES_PKCS1_OAEP_MGF1_SHA512: for (n = 0; n < num_params; n++) { if (params[n].attributeID == TEE_ATTR_RSA_OAEP_LABEL) { label = params[n].content.ref.buffer; label_len = params[n].content.ref.length; break; } } if (cs->mode == TEE_MODE_ENCRYPT) { res = crypto_acipher_rsaes_encrypt(cs->algo, o->attr, label, label_len, src_data, src_len, dst_data, &dlen); } else if (cs->mode == TEE_MODE_DECRYPT) { res = crypto_acipher_rsaes_decrypt( cs->algo, o->attr, label, label_len, src_data, src_len, dst_data, &dlen); } else { res = TEE_ERROR_BAD_PARAMETERS; } break; #if defined(CFG_CRYPTO_RSASSA_NA1) case TEE_ALG_RSASSA_PKCS1_V1_5: #endif case TEE_ALG_RSASSA_PKCS1_V1_5_MD5: case TEE_ALG_RSASSA_PKCS1_V1_5_SHA1: case TEE_ALG_RSASSA_PKCS1_V1_5_SHA224: case TEE_ALG_RSASSA_PKCS1_V1_5_SHA256: case TEE_ALG_RSASSA_PKCS1_V1_5_SHA384: case TEE_ALG_RSASSA_PKCS1_V1_5_SHA512: case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA1: case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA224: case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA256: case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA384: case TEE_ALG_RSASSA_PKCS1_PSS_MGF1_SHA512: if (cs->mode != TEE_MODE_SIGN) { res = TEE_ERROR_BAD_PARAMETERS; break; } salt_len = pkcs1_get_salt_len(params, num_params, src_len); res = crypto_acipher_rsassa_sign(cs->algo, o->attr, salt_len, src_data, src_len, dst_data, &dlen); break; case TEE_ALG_DSA_SHA1: case TEE_ALG_DSA_SHA224: case TEE_ALG_DSA_SHA256: res = crypto_acipher_dsa_sign(cs->algo, o->attr, src_data, src_len, dst_data, &dlen); break; case TEE_ALG_ED25519: res = tee_svc_obj_ed25519_sign(o->attr, src_data, src_len, dst_data, &dlen, params, num_params); break; case TEE_ALG_ECDSA_P192: case TEE_ALG_ECDSA_P224: case TEE_ALG_ECDSA_P256: case TEE_ALG_ECDSA_P384: case TEE_ALG_ECDSA_P521: case TEE_ALG_SM2_DSA_SM3: res = crypto_acipher_ecc_sign(cs->algo, o->attr, src_data, src_len, dst_data, &dlen); break; default: res = TEE_ERROR_BAD_PARAMETERS; break; } out: free_wipe(params); if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { TEE_Result res2 = put_user_u64(dst_len, dlen); if (res2 != TEE_SUCCESS) return res2; } return res; } TEE_Result syscall_asymm_verify(unsigned long state, const struct utee_attribute *usr_params, size_t num_params, const void *data, size_t data_len, const void *sig, size_t sig_len) { struct ts_session *sess = ts_get_current_session(); struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); struct tee_cryp_state *cs = NULL; TEE_Result res = TEE_SUCCESS; TEE_Attribute *params = NULL; struct tee_obj *o = NULL; size_t hash_size = 0; uint32_t hash_algo = 0; int salt_len = 0; size_t alloc_size = 0; res = tee_svc_cryp_get_state(sess, uref_to_vaddr(state), &cs); if (res != TEE_SUCCESS) return res; if (cs->mode != TEE_MODE_VERIFY) return TEE_ERROR_BAD_PARAMETERS; data = memtag_strip_tag_const(data); sig = memtag_strip_tag_const(sig); res = vm_check_access_rights(&utc->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)data, data_len); if (res != TEE_SUCCESS) return res; res = vm_check_access_rights(&utc->uctx, TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, (uaddr_t)sig, sig_len); if (res != TEE_SUCCESS) return res; if (MUL_OVERFLOW(sizeof(TEE_Attribute), num_params, &alloc_size)) return TEE_ERROR_OVERFLOW; params = malloc(alloc_size); if (!params) return TEE_ERROR_OUT_OF_MEMORY; res = copy_in_attrs(utc, usr_params, num_params, params); if (res != TEE_SUCCESS) goto out; res = tee_obj_get(utc, cs->key1, &o); if (res != TEE_SUCCESS) goto out; if ((o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED) == 0) { res = TEE_ERROR_BAD_PARAMETERS; goto out; } switch (TEE_ALG_GET_MAIN_ALG(cs->algo)) { case TEE_MAIN_ALGO_RSA: if (cs->algo != TEE_ALG_RSASSA_PKCS1_V1_5) { hash_algo = TEE_DIGEST_HASH_TO_ALGO(cs->algo); res = tee_alg_get_digest_size(hash_algo, &hash_size); if (res != TEE_SUCCESS) break; if (data_len != hash_size) { res = TEE_ERROR_BAD_PARAMETERS; break; } salt_len = pkcs1_get_salt_len(params, num_params, hash_size); } res = crypto_acipher_rsassa_verify(cs->algo, o->attr, salt_len, data, data_len, sig, sig_len); break; case TEE_MAIN_ALGO_DSA: hash_algo = TEE_DIGEST_HASH_TO_ALGO(cs->algo); res = tee_alg_get_digest_size(hash_algo, &hash_size); if (res != TEE_SUCCESS) break; if (data_len != hash_size) { struct dsa_public_key *key = o->attr; /* * Depending on the DSA algorithm (NIST), the * digital signature output size may be truncated * to the size of a key pair (Q prime size). Q * prime size must be less or equal than the hash * output length of the hash algorithm involved. * * We're checking here in order to be able to * return this particular error code, which will * cause TEE_AsymmetricVerifyDigest() to panic as * required by GP. crypto_acipher_dsa_verify() is * implemented in the glue layer of the crypto * library and it might be a bit harder to catch * this particular case there or lead to duplicated * code in different crypto glue layers. * * The GP spec says that we SHOULD panic if * data_len != hash_size, but that would break a * few of the DSA tests in xtest where the * hash_size is larger than possible data_len. So * the compromise is in case data_len != hash_size * check that it's not smaller than what makes * sense. */ if (data_len != crypto_bignum_num_bytes(key->q)) { res = TEE_ERROR_BAD_PARAMETERS; break; } } res = crypto_acipher_dsa_verify(cs->algo, o->attr, data, data_len, sig, sig_len); break; case TEE_MAIN_ALGO_ED25519: res = tee_svc_obj_ed25519_verify(o->attr, data, data_len, sig, sig_len, params, num_params); break; case TEE_MAIN_ALGO_ECDSA: case TEE_MAIN_ALGO_SM2_DSA_SM3: res = crypto_acipher_ecc_verify(cs->algo, o->attr, data, data_len, sig, sig_len); break; default: res = TEE_ERROR_NOT_SUPPORTED; } out: free_wipe(params); return res; }