1d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * All rights reserved. 3d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 4d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * This package is an SSL implementation written 5d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * by Eric Young (eay@cryptsoft.com). 6d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * The implementation was written so as to conform with Netscapes SSL. 7d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 8d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * This library is free for commercial and non-commercial use as long as 9d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * the following conditions are aheared to. The following conditions 10d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * apply to all code found in this distribution, be it the RC4, RSA, 11d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * included with this distribution is covered by the same copyright terms 13d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * except that the holder is Tim Hudson (tjh@cryptsoft.com). 14d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 15d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * Copyright remains Eric Young's, and as such any Copyright notices in 16d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * the code are not to be removed. 17d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * If this package is used in a product, Eric Young should be given attribution 18d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * as the author of the parts of the library used. 19d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * This can be in the form of a textual message at program startup or 20d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * in documentation (online or textual) provided with the package. 21d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 22d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * Redistribution and use in source and binary forms, with or without 23d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * modification, are permitted provided that the following conditions 24d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * are met: 25d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 1. Redistributions of source code must retain the copyright 26d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * notice, this list of conditions and the following disclaimer. 27d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 2. Redistributions in binary form must reproduce the above copyright 28d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * notice, this list of conditions and the following disclaimer in the 29d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * documentation and/or other materials provided with the distribution. 30d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 3. All advertising materials mentioning features or use of this software 31d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * must display the following acknowledgement: 32d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * "This product includes cryptographic software written by 33d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * Eric Young (eay@cryptsoft.com)" 34d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * The word 'cryptographic' can be left out if the rouines from the library 35d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * being used are not cryptographic related :-). 36d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 4. If you include any Windows specific code (or a derivative thereof) from 37d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * the apps directory (application code) you must include an acknowledgement: 38d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 39d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 40d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * SUCH DAMAGE. 51d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 52d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * The licence and distribution terms for any publically available version or 53d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * derivative of this code cannot be changed. i.e. this code cannot simply be 54d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * copied and put under another distribution licence 55d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * [including the GNU Public Licence.] */ 56d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 57d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#ifndef OPENSSL_HEADER_DIGEST_H 58d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#define OPENSSL_HEADER_DIGEST_H 59d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 60d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#include <openssl/base.h> 61d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 62d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#if defined(__cplusplus) 63d9e397b599b13d642138480a28c14db7a136bf0Adam Langleyextern "C" { 64d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#endif 65d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 66d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 67d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Digest functions. 68d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 69d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * An EVP_MD abstracts the details of a specific hash function allowing code to 70d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * deal with the concept of a "hash function" without needing to know exactly 71d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * which hash function it is. */ 72d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 73d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 74d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Hash algorithms. 75d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 76d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * The following functions return |EVP_MD| objects that implement the named hash 77d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * function. */ 78d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 79d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_md4(void); 80d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_md5(void); 81d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_sha1(void); 82d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_sha224(void); 83d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_sha256(void); 84d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_sha384(void); 85d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_sha512(void); 86d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 87d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_md5_sha1 is a TLS-specific |EVP_MD| which computes the concatenation of 88d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * MD5 and SHA-1, as used in TLS 1.1 and below. */ 89d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_md5_sha1(void); 90d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 91d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_get_digestbynid returns an |EVP_MD| for the given NID, or NULL if no 92d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * such digest is known. */ 93d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_get_digestbynid(int nid); 94d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 95d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_get_digestbyobj returns an |EVP_MD| for the given |ASN1_OBJECT|, or NULL 96d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * if no such digest is known. */ 97d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_get_digestbyobj(const ASN1_OBJECT *obj); 98d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 99d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 100d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Digest contexts. 101d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 102d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * An EVP_MD_CTX represents the state of a specific digest operation in 103d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * progress. */ 104d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 1055d625781eb8ff5cc8111d2302efe900103bf0adeRobert Sloan/* EVP_MD_CTX_init initialises an, already allocated, |EVP_MD_CTX|. This is the 1065d625781eb8ff5cc8111d2302efe900103bf0adeRobert Sloan * same as setting the structure to zero. */ 107d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT void EVP_MD_CTX_init(EVP_MD_CTX *ctx); 108d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 109d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_CTX_create allocates and initialises a fresh |EVP_MD_CTX| and returns 110d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * it, or NULL on allocation failure. */ 111d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT EVP_MD_CTX *EVP_MD_CTX_create(void); 112d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 113d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_CTX_cleanup frees any resources owned by |ctx| and resets it to a 114d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * freshly initialised state. It does not free |ctx| itself. It returns one. */ 115d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx); 116d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 117d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_CTX_destroy calls |EVP_MD_CTX_cleanup| and then frees |ctx| itself. */ 118d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx); 119d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 120d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_CTX_copy_ex sets |out|, which must already be initialised, to be a 121d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * copy of |in|. It returns one on success and zero on error. */ 122d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in); 123d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 124d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 125d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Digest operations. */ 126d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 127d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_DigestInit_ex configures |ctx|, which must already have been 128d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * initialised, for a fresh hashing operation using |type|. It returns one on 129d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * success and zero otherwise. */ 130d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, 131d9e397b599b13d642138480a28c14db7a136bf0Adam Langley ENGINE *engine); 132d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 133d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_DigestInit acts like |EVP_DigestInit_ex| except that |ctx| is 134d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * initialised before use. */ 135d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type); 136d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 137d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_DigestUpdate hashes |len| bytes from |data| into the hashing operation 138f4e427204234da139fd0585def4b4e22502e33f0Adam Langley * in |ctx|. It returns one. */ 139d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, 140d9e397b599b13d642138480a28c14db7a136bf0Adam Langley size_t len); 141d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 142e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root/* EVP_MAX_MD_SIZE is the largest digest size supported, in bytes. 143e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root * Functions that output a digest generally require the buffer have 144e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root * at least this much space. */ 145d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#define EVP_MAX_MD_SIZE 64 /* SHA-512 is the longest so far. */ 146d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 147b0b45c63bbbf16b7f5ff3cbe3f1d0905108038aaSteven Valdez/* EVP_MAX_MD_BLOCK_SIZE is the largest digest block size supported, in 148b0b45c63bbbf16b7f5ff3cbe3f1d0905108038aaSteven Valdez * bytes. */ 1494969cc9b0ab2905ec478277f50ed3849b37a6c6bDavid Benjamin#define EVP_MAX_MD_BLOCK_SIZE 128 /* SHA-512 is the longest so far. */ 1504969cc9b0ab2905ec478277f50ed3849b37a6c6bDavid Benjamin 151d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_DigestFinal_ex finishes the digest in |ctx| and writes the output to 152c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin * |md_out|. |EVP_MD_CTX_size| bytes are written, which is at most 153c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin * |EVP_MAX_MD_SIZE|. If |out_size| is not NULL then |*out_size| is set to the 154c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin * number of bytes written. It returns one. After this call, the hash cannot be 155c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin * updated or finished again until |EVP_DigestInit_ex| is called to start 156c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin * another hashing operation. */ 157d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, uint8_t *md_out, 158d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unsigned int *out_size); 159d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 160d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_DigestFinal acts like |EVP_DigestFinal_ex| except that 161d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * |EVP_MD_CTX_cleanup| is called on |ctx| before returning. */ 162d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_DigestFinal(EVP_MD_CTX *ctx, uint8_t *md_out, 163d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unsigned int *out_size); 164d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 165c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin/* EVP_Digest performs a complete hashing operation in one call. It hashes |len| 166c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin * bytes from |data| and writes the digest to |md_out|. |EVP_MD_CTX_size| bytes 167c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin * are written, which is at most |EVP_MAX_MD_SIZE|. If |out_size| is not NULL 168c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin * then |*out_size| is set to the number of bytes written. It returns one on 169c895d6b1c580258e72e1ed3fcc86d38970ded9e1David Benjamin * success and zero otherwise. */ 170d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_Digest(const void *data, size_t len, uint8_t *md_out, 171d9e397b599b13d642138480a28c14db7a136bf0Adam Langley unsigned int *md_out_size, const EVP_MD *type, 172d9e397b599b13d642138480a28c14db7a136bf0Adam Langley ENGINE *impl); 173d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 174d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 175d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Digest function accessors. 176d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * 177d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * These functions allow code to learn details about an abstract hash 178d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * function. */ 179d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 180b0b45c63bbbf16b7f5ff3cbe3f1d0905108038aaSteven Valdez/* EVP_MD_type returns a NID identifying |md|. (For example, |NID_sha256|.) */ 181d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_MD_type(const EVP_MD *md); 182d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 183d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_flags returns the flags for |md|, which is a set of |EVP_MD_FLAG_*| 184d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * values, ORed together. */ 185d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT uint32_t EVP_MD_flags(const EVP_MD *md); 186d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 187d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_size returns the digest size of |md|, in bytes. */ 188d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT size_t EVP_MD_size(const EVP_MD *md); 189d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 190e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root/* EVP_MD_block_size returns the native block-size of |md|, in bytes. */ 191d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT size_t EVP_MD_block_size(const EVP_MD *md); 192d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 193d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_FLAG_PKEY_DIGEST indicates the the digest function is used with a 194d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * specific public key in order to verify signatures. (For example, 195d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * EVP_dss1.) */ 196d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#define EVP_MD_FLAG_PKEY_DIGEST 1 197d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 198d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_FLAG_DIGALGID_ABSENT indicates that the parameter type in an X.509 199d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * DigestAlgorithmIdentifier representing this digest function should be 200d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * undefined rather than NULL. */ 201d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#define EVP_MD_FLAG_DIGALGID_ABSENT 2 202d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 203d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 204d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Deprecated functions. */ 205d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 206d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_CTX_copy sets |out|, which must /not/ be initialised, to be a copy of 207d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * |in|. It returns one on success and zero on error. */ 208d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in); 209d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 210d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_add_digest does nothing and returns one. It exists only for 211d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * compatibility with OpenSSL. */ 212d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_add_digest(const EVP_MD *digest); 213d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 214e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root/* EVP_get_digestbyname returns an |EVP_MD| given a human readable name in 215f4e427204234da139fd0585def4b4e22502e33f0Adam Langley * |name|, or NULL if the name is unknown. */ 216f4e427204234da139fd0585def4b4e22502e33f0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_get_digestbyname(const char *); 217f4e427204234da139fd0585def4b4e22502e33f0Adam Langley 218d316cba52b5aeac660e03068e65dd873669ce1dbDavid Benjamin/* EVP_dss1 returns the value of EVP_sha1(). This was provided by OpenSSL to 219d316cba52b5aeac660e03068e65dd873669ce1dbDavid Benjamin * specifiy the original DSA signatures, which were fixed to use SHA-1. Note, 220d316cba52b5aeac660e03068e65dd873669ce1dbDavid Benjamin * however, that attempting to sign or verify DSA signatures with the EVP 221d316cba52b5aeac660e03068e65dd873669ce1dbDavid Benjamin * interface will always fail. */ 222d316cba52b5aeac660e03068e65dd873669ce1dbDavid BenjaminOPENSSL_EXPORT const EVP_MD *EVP_dss1(void); 223d316cba52b5aeac660e03068e65dd873669ce1dbDavid Benjamin 224d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 225d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* Digest operation accessors. */ 226d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 227d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_CTX_md returns the underlying digest function, or NULL if one has not 228d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * been set. */ 229d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx); 230d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 231e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root/* EVP_MD_CTX_size returns the digest size of |ctx|, in bytes. It 232e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root * will crash if a digest hasn't been set on |ctx|. */ 2334969cc9b0ab2905ec478277f50ed3849b37a6c6bDavid BenjaminOPENSSL_EXPORT size_t EVP_MD_CTX_size(const EVP_MD_CTX *ctx); 234d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 235d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_CTX_block_size returns the block size of the digest function used by 236e99801b603dea8893dcc61c70b327ef2d00b652cKenny Root * |ctx|, in bytes. It will crash if a digest hasn't been set on |ctx|. */ 2374969cc9b0ab2905ec478277f50ed3849b37a6c6bDavid BenjaminOPENSSL_EXPORT size_t EVP_MD_CTX_block_size(const EVP_MD_CTX *ctx); 238d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 239d9e397b599b13d642138480a28c14db7a136bf0Adam Langley/* EVP_MD_CTX_type returns a NID describing the digest function used by |ctx|. 240e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5Adam Langley * (For example, |NID_sha256|.) It will crash if a digest hasn't been set on 241d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * |ctx|. */ 242d9e397b599b13d642138480a28c14db7a136bf0Adam LangleyOPENSSL_EXPORT int EVP_MD_CTX_type(const EVP_MD_CTX *ctx); 243d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 244d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 245d9e397b599b13d642138480a28c14db7a136bf0Adam Langleystruct evp_md_pctx_ops; 246d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 247d9e397b599b13d642138480a28c14db7a136bf0Adam Langleystruct env_md_ctx_st { 248d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* digest is the underlying digest function, or NULL if not set. */ 249d9e397b599b13d642138480a28c14db7a136bf0Adam Langley const EVP_MD *digest; 250d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* md_data points to a block of memory that contains the hash-specific 251d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * context. */ 252d9e397b599b13d642138480a28c14db7a136bf0Adam Langley void *md_data; 253d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 254d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* pctx is an opaque (at this layer) pointer to additional context that 255d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * EVP_PKEY functions may store in this object. */ 256d9e397b599b13d642138480a28c14db7a136bf0Adam Langley EVP_PKEY_CTX *pctx; 257d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 258d9e397b599b13d642138480a28c14db7a136bf0Adam Langley /* pctx_ops, if not NULL, points to a vtable that contains functions to 259d9e397b599b13d642138480a28c14db7a136bf0Adam Langley * manipulate |pctx|. */ 260d9e397b599b13d642138480a28c14db7a136bf0Adam Langley const struct evp_md_pctx_ops *pctx_ops; 261d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} /* EVP_MD_CTX */; 262d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 263d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 264d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#if defined(__cplusplus) 265d9e397b599b13d642138480a28c14db7a136bf0Adam Langley} /* extern C */ 266f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin 267f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin#if !defined(BORINGSSL_NO_CXX) 268f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjaminextern "C++" { 269f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin 270f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjaminnamespace bssl { 271f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin 272f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid BenjaminBORINGSSL_MAKE_DELETER(EVP_MD_CTX, EVP_MD_CTX_destroy) 273f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin 274f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjaminusing ScopedEVP_MD_CTX = 275f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin internal::StackAllocated<EVP_MD_CTX, int, EVP_MD_CTX_init, 276f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin EVP_MD_CTX_cleanup>; 277f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin 278f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin} // namespace bssl 279f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin 280f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin} // extern C++ 281f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin#endif 282f0c4a6c4bbde5229ceb86740703243fe5c436aadDavid Benjamin 283d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#endif 284d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 285d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#define DIGEST_R_INPUT_NOT_INITIALIZED 100 2866d0d00e090b753250659b9a2d67dab7467257900Robert Sloan#define DIGEST_R_DECODE_ERROR 101 2876d0d00e090b753250659b9a2d67dab7467257900Robert Sloan#define DIGEST_R_UNKNOWN_HASH 102 288d9e397b599b13d642138480a28c14db7a136bf0Adam Langley 289d9e397b599b13d642138480a28c14db7a136bf0Adam Langley#endif /* OPENSSL_HEADER_DIGEST_H */ 290