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- /*
- * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
- #include <openssl/sha.h>
- #include <openssl/crypto.h>
- #include <openssl/core_numbers.h>
- #include "internal/provider_algs.h"
- /*
- * Forward declaration of everything implemented here. This is not strictly
- * necessary for the compiler, but provides an assurance that the signatures
- * of the functions in the dispatch table are correct.
- */
- static OSSL_OP_digest_newctx_fn sha256_newctx;
- #if 0 /* Not defined here */
- static OSSL_OP_digest_init_fn sha256_init;
- static OSSL_OP_digest_update_fn sha256_update;
- #endif
- static OSSL_OP_digest_final_fn sha256_final;
- static OSSL_OP_digest_freectx_fn sha256_freectx;
- static OSSL_OP_digest_dupctx_fn sha256_dupctx;
- static OSSL_OP_digest_size_fn sha256_size;
- static OSSL_OP_digest_block_size_fn sha256_size;
- static int sha256_final(void *ctx,
- unsigned char *md, size_t *mdl, size_t mdsz)
- {
- if (mdsz >= SHA256_DIGEST_LENGTH
- && SHA256_Final(md, ctx)) {
- *mdl = SHA256_DIGEST_LENGTH;
- return 1;
- }
- return 0;
- }
- static void *sha256_newctx(void)
- {
- SHA256_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
- return ctx;
- }
- static void sha256_freectx(void *vctx)
- {
- SHA256_CTX *ctx = (SHA256_CTX *)vctx;
- OPENSSL_clear_free(ctx, sizeof(*ctx));
- }
- static void *sha256_dupctx(void *ctx)
- {
- SHA256_CTX *in = (SHA256_CTX *)ctx;
- SHA256_CTX *ret = OPENSSL_malloc(sizeof(*ret));
- *ret = *in;
- return ret;
- }
- static size_t sha256_size(void)
- {
- return SHA256_DIGEST_LENGTH;
- }
- static size_t sha256_block_size(void)
- {
- return SHA256_CBLOCK;
- }
- const OSSL_DISPATCH sha256_functions[] = {
- { OSSL_FUNC_DIGEST_NEWCTX, (void (*)(void))sha256_newctx },
- { OSSL_FUNC_DIGEST_INIT, (void (*)(void))SHA256_Init },
- { OSSL_FUNC_DIGEST_UPDATE, (void (*)(void))SHA256_Update },
- { OSSL_FUNC_DIGEST_FINAL, (void (*)(void))sha256_final },
- { OSSL_FUNC_DIGEST_FREECTX, (void (*)(void))sha256_freectx },
- { OSSL_FUNC_DIGEST_DUPCTX, (void (*)(void))sha256_dupctx },
- { OSSL_FUNC_DIGEST_SIZE, (void (*)(void))sha256_size },
- { OSSL_FUNC_DIGEST_BLOCK_SIZE, (void (*)(void))sha256_block_size },
- { 0, NULL }
- };
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