1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* keyctl kernel bits 3 * 4 * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #ifndef __LINUX_KEYCTL_H 9 #define __LINUX_KEYCTL_H 10 11 #include <uapi/linux/keyctl.h> 12 13 struct kernel_pkey_query { 14 __u32 supported_ops; /* Which ops are supported */ 15 __u32 key_size; /* Size of the key in bits */ 16 __u16 max_data_size; /* Maximum size of raw data to sign in bytes */ 17 __u16 max_sig_size; /* Maximum size of signature in bytes */ 18 __u16 max_enc_size; /* Maximum size of encrypted blob in bytes */ 19 __u16 max_dec_size; /* Maximum size of decrypted blob in bytes */ 20 }; 21 22 enum kernel_pkey_operation { 23 kernel_pkey_encrypt, 24 kernel_pkey_decrypt, 25 kernel_pkey_sign, 26 kernel_pkey_verify, 27 }; 28 29 struct kernel_pkey_params { 30 struct key *key; 31 const char *encoding; /* Encoding (eg. "oaep" or "raw" for none) */ 32 const char *hash_algo; /* Digest algorithm used (eg. "sha1") or NULL if N/A */ 33 char *info; /* Modified info string to be released later */ 34 __u32 in_len; /* Input data size */ 35 union { 36 __u32 out_len; /* Output buffer size (enc/dec/sign) */ 37 __u32 in2_len; /* 2nd input data size (verify) */ 38 }; 39 enum kernel_pkey_operation op : 8; 40 }; 41 42 #endif /* __LINUX_KEYCTL_H */ 43