1 // Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef OPENSSL_HEADER_CRYPTO_FIPSMODULE_DIGEST_INTERNAL_H 16 #define OPENSSL_HEADER_CRYPTO_FIPSMODULE_DIGEST_INTERNAL_H 17 18 #include <openssl/base.h> 19 20 #if defined(__cplusplus) 21 extern "C" { 22 #endif 23 24 25 // env_md_st is typoed ("evp" -> "env"), but the typo comes from OpenSSL and 26 // some consumers forward-declare these structures so we're leaving it alone. 27 struct env_md_st { 28 // type contains a NID identifing the digest function. (For example, 29 // NID_md5.) 30 int type; 31 32 // md_size contains the size, in bytes, of the resulting digest. 33 unsigned md_size; 34 35 // flags contains the OR of |EVP_MD_FLAG_*| values. 36 uint32_t flags; 37 38 // init initialises the state in |ctx->md_data|. 39 void (*init)(EVP_MD_CTX *ctx); 40 41 // update hashes |len| bytes of |data| into the state in |ctx->md_data|. 42 void (*update)(EVP_MD_CTX *ctx, const void *data, size_t count); 43 44 // final completes the hash and writes |md_size| bytes of digest to |out|. 45 void (*final)(EVP_MD_CTX *ctx, uint8_t *out); 46 47 // block_size contains the hash's native block size. 48 unsigned block_size; 49 50 // ctx_size contains the size, in bytes, of the state of the hash function. 51 unsigned ctx_size; 52 }; 53 54 // evp_md_pctx_ops contains function pointers to allow the |pctx| member of 55 // |EVP_MD_CTX| to be manipulated without breaking layering by calling EVP 56 // functions. 57 struct evp_md_pctx_ops { 58 // free is called when an |EVP_MD_CTX| is being freed and the |pctx| also 59 // needs to be freed. 60 void (*free)(EVP_PKEY_CTX *pctx); 61 62 // dup is called when an |EVP_MD_CTX| is copied and so the |pctx| also needs 63 // to be copied. 64 EVP_PKEY_CTX *(*dup)(EVP_PKEY_CTX *pctx); 65 }; 66 67 68 #if defined(__cplusplus) 69 } // extern C 70 #endif 71 72 #endif // OPENSSL_HEADER_CRYPTO_FIPSMODULE_DIGEST_INTERNAL_H 73