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- /* 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 */
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