ref: 98c1cd7ae022efe276123898af6b892eade0732c
dir: /third_party/boringssl/src/crypto/fipsmodule/digest/internal.h/
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#ifndef OPENSSL_HEADER_DIGEST_INTERNAL_H
#define OPENSSL_HEADER_DIGEST_INTERNAL_H
#include <openssl/base.h>
#if defined(__cplusplus)
extern "C" {
#endif
struct env_md_st {
// type contains a NID identifing the digest function. (For example,
// NID_md5.)
int type;
// md_size contains the size, in bytes, of the resulting digest.
unsigned md_size;
// flags contains the OR of |EVP_MD_FLAG_*| values.
uint32_t flags;
// init initialises the state in |ctx->md_data|.
void (*init)(EVP_MD_CTX *ctx);
// update hashes |len| bytes of |data| into the state in |ctx->md_data|.
void (*update)(EVP_MD_CTX *ctx, const void *data, size_t count);
// final completes the hash and writes |md_size| bytes of digest to |out|.
void (*final)(EVP_MD_CTX *ctx, uint8_t *out);
// block_size contains the hash's native block size.
unsigned block_size;
// ctx_size contains the size, in bytes, of the state of the hash function.
unsigned ctx_size;
};
// evp_md_pctx_ops contains function pointers to allow the |pctx| member of
// |EVP_MD_CTX| to be manipulated without breaking layering by calling EVP
// functions.
struct evp_md_pctx_ops {
// free is called when an |EVP_MD_CTX| is being freed and the |pctx| also
// needs to be freed.
void (*free) (EVP_PKEY_CTX *pctx);
// dup is called when an |EVP_MD_CTX| is copied and so the |pctx| also needs
// to be copied.
EVP_PKEY_CTX* (*dup) (EVP_PKEY_CTX *pctx);
};
#if defined(__cplusplus)
} // extern C
#endif
#endif // OPENSSL_HEADER_DIGEST_INTERNAL