| // 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. |
| |
| #include <openssl/digest.h> |
| |
| #include <assert.h> |
| #include <string.h> |
| |
| #include <openssl/err.h> |
| #include <openssl/mem.h> |
| |
| #include "../../internal.h" |
| #include "internal.h" |
| |
| |
| int EVP_MD_type(const EVP_MD *md) { return md->type; } |
| |
| int EVP_MD_nid(const EVP_MD *md) { return EVP_MD_type(md); } |
| |
| uint32_t EVP_MD_flags(const EVP_MD *md) { return md->flags; } |
| |
| size_t EVP_MD_size(const EVP_MD *md) { return md->md_size; } |
| |
| size_t EVP_MD_block_size(const EVP_MD *md) { return md->block_size; } |
| |
| |
| void EVP_MD_CTX_init(EVP_MD_CTX *ctx) { |
| OPENSSL_memset(ctx, 0, sizeof(EVP_MD_CTX)); |
| } |
| |
| EVP_MD_CTX *EVP_MD_CTX_new(void) { |
| EVP_MD_CTX *ctx = |
| reinterpret_cast<EVP_MD_CTX *>(OPENSSL_malloc(sizeof(EVP_MD_CTX))); |
| |
| if (ctx) { |
| EVP_MD_CTX_init(ctx); |
| } |
| |
| return ctx; |
| } |
| |
| EVP_MD_CTX *EVP_MD_CTX_create(void) { return EVP_MD_CTX_new(); } |
| |
| int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx) { |
| OPENSSL_free(ctx->md_data); |
| |
| assert(ctx->pctx == NULL || ctx->pctx_ops != NULL); |
| if (ctx->pctx_ops) { |
| ctx->pctx_ops->free(ctx->pctx); |
| } |
| |
| EVP_MD_CTX_init(ctx); |
| |
| return 1; |
| } |
| |
| void EVP_MD_CTX_cleanse(EVP_MD_CTX *ctx) { |
| OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size); |
| EVP_MD_CTX_cleanup(ctx); |
| } |
| |
| void EVP_MD_CTX_free(EVP_MD_CTX *ctx) { |
| if (!ctx) { |
| return; |
| } |
| |
| EVP_MD_CTX_cleanup(ctx); |
| OPENSSL_free(ctx); |
| } |
| |
| void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx) { EVP_MD_CTX_free(ctx); } |
| |
| int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, uint8_t *out, size_t len) { |
| OPENSSL_PUT_ERROR(DIGEST, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| return 0; |
| } |
| |
| uint32_t EVP_MD_meth_get_flags(const EVP_MD *md) { return EVP_MD_flags(md); } |
| |
| void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) {} |
| |
| int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) { |
| // |in->digest| may be NULL if this is a signing |EVP_MD_CTX| for, e.g., |
| // Ed25519 which does not hash with |EVP_MD_CTX|. |
| if (in == NULL || (in->pctx == NULL && in->digest == NULL)) { |
| OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_INPUT_NOT_INITIALIZED); |
| return 0; |
| } |
| |
| EVP_PKEY_CTX *pctx = NULL; |
| assert(in->pctx == NULL || in->pctx_ops != NULL); |
| if (in->pctx) { |
| pctx = in->pctx_ops->dup(in->pctx); |
| if (!pctx) { |
| return 0; |
| } |
| } |
| |
| uint8_t *tmp_buf = NULL; |
| if (in->digest != NULL) { |
| if (out->digest != in->digest) { |
| assert(in->digest->ctx_size != 0); |
| tmp_buf = |
| reinterpret_cast<uint8_t *>(OPENSSL_malloc(in->digest->ctx_size)); |
| if (tmp_buf == NULL) { |
| if (pctx) { |
| in->pctx_ops->free(pctx); |
| } |
| return 0; |
| } |
| } else { |
| // |md_data| will be the correct size in this case. It's removed from |
| // |out| so that |EVP_MD_CTX_cleanup| doesn't free it, and then it's |
| // reused. |
| tmp_buf = reinterpret_cast<uint8_t *>(out->md_data); |
| out->md_data = NULL; |
| } |
| } |
| |
| EVP_MD_CTX_cleanup(out); |
| |
| out->digest = in->digest; |
| out->md_data = tmp_buf; |
| if (in->digest != NULL) { |
| OPENSSL_memcpy(out->md_data, in->md_data, in->digest->ctx_size); |
| } |
| out->pctx = pctx; |
| out->pctx_ops = in->pctx_ops; |
| assert(out->pctx == NULL || out->pctx_ops != NULL); |
| |
| return 1; |
| } |
| |
| void EVP_MD_CTX_move(EVP_MD_CTX *out, EVP_MD_CTX *in) { |
| EVP_MD_CTX_cleanup(out); |
| // While not guaranteed, |EVP_MD_CTX| is currently safe to move with |memcpy|. |
| // bssl-crypto currently relies on this, however, so if we change this, we |
| // need to box the |HMAC_CTX|. (Relying on this is only fine because we assume |
| // BoringSSL and bssl-crypto will always be updated atomically. We do not |
| // allow any version skew between the two.) |
| OPENSSL_memcpy(out, in, sizeof(EVP_MD_CTX)); |
| EVP_MD_CTX_init(in); |
| } |
| |
| int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) { |
| EVP_MD_CTX_init(out); |
| return EVP_MD_CTX_copy_ex(out, in); |
| } |
| |
| int EVP_MD_CTX_reset(EVP_MD_CTX *ctx) { |
| EVP_MD_CTX_cleanup(ctx); |
| EVP_MD_CTX_init(ctx); |
| return 1; |
| } |
| |
| int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *engine) { |
| if (ctx->digest != type) { |
| assert(type->ctx_size != 0); |
| uint8_t *md_data = |
| reinterpret_cast<uint8_t *>(OPENSSL_malloc(type->ctx_size)); |
| if (md_data == NULL) { |
| return 0; |
| } |
| |
| OPENSSL_free(ctx->md_data); |
| ctx->md_data = md_data; |
| ctx->digest = type; |
| } |
| |
| assert(ctx->pctx == NULL || ctx->pctx_ops != NULL); |
| |
| ctx->digest->init(ctx); |
| return 1; |
| } |
| |
| int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) { |
| EVP_MD_CTX_init(ctx); |
| return EVP_DigestInit_ex(ctx, type, NULL); |
| } |
| |
| int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { |
| ctx->digest->update(ctx, data, len); |
| return 1; |
| } |
| |
| int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, uint8_t *md_out, unsigned int *size) { |
| assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE); |
| ctx->digest->final(ctx, md_out); |
| if (size != NULL) { |
| *size = ctx->digest->md_size; |
| } |
| OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size); |
| return 1; |
| } |
| |
| int EVP_DigestFinal(EVP_MD_CTX *ctx, uint8_t *md, unsigned int *size) { |
| (void)EVP_DigestFinal_ex(ctx, md, size); |
| EVP_MD_CTX_cleanup(ctx); |
| return 1; |
| } |
| |
| int EVP_Digest(const void *data, size_t count, uint8_t *out_md, |
| unsigned int *out_size, const EVP_MD *type, ENGINE *impl) { |
| EVP_MD_CTX ctx; |
| int ret; |
| |
| EVP_MD_CTX_init(&ctx); |
| ret = EVP_DigestInit_ex(&ctx, type, impl) && |
| EVP_DigestUpdate(&ctx, data, count) && |
| EVP_DigestFinal_ex(&ctx, out_md, out_size); |
| EVP_MD_CTX_cleanup(&ctx); |
| |
| return ret; |
| } |
| |
| const EVP_MD *EVP_MD_CTX_get0_md(const EVP_MD_CTX *ctx) { |
| if (ctx == NULL) { |
| return NULL; |
| } |
| return ctx->digest; |
| } |
| |
| const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) { |
| return EVP_MD_CTX_get0_md(ctx); |
| } |
| |
| size_t EVP_MD_CTX_size(const EVP_MD_CTX *ctx) { |
| return EVP_MD_size(EVP_MD_CTX_get0_md(ctx)); |
| } |
| |
| size_t EVP_MD_CTX_block_size(const EVP_MD_CTX *ctx) { |
| return EVP_MD_block_size(EVP_MD_CTX_get0_md(ctx)); |
| } |
| |
| int EVP_MD_CTX_type(const EVP_MD_CTX *ctx) { |
| return EVP_MD_type(EVP_MD_CTX_get0_md(ctx)); |
| } |
| |
| int EVP_add_digest(const EVP_MD *digest) { return 1; } |