| // Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #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 |