| // 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/evp.h> |
| |
| #include <limits.h> |
| |
| #include <openssl/digest.h> |
| #include <openssl/err.h> |
| |
| #include "internal.h" |
| |
| |
| int EVP_SignInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) { |
| return EVP_DigestInit_ex(ctx, type, impl); |
| } |
| |
| int EVP_SignInit(EVP_MD_CTX *ctx, const EVP_MD *type) { |
| return EVP_DigestInit(ctx, type); |
| } |
| |
| int EVP_SignUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { |
| return EVP_DigestUpdate(ctx, data, len); |
| } |
| |
| int EVP_SignFinal(const EVP_MD_CTX *ctx, uint8_t *sig, unsigned *out_sig_len, |
| EVP_PKEY *pkey) { |
| // Ensure the final result will fit in |unsigned|. |
| size_t sig_len = EVP_PKEY_size(pkey); |
| if (sig_len > UINT_MAX) { |
| sig_len = UINT_MAX; |
| } |
| |
| *out_sig_len = 0; |
| uint8_t m[EVP_MAX_MD_SIZE]; |
| unsigned m_len; |
| bssl::ScopedEVP_MD_CTX tmp_ctx; |
| if (!EVP_MD_CTX_copy_ex(tmp_ctx.get(), ctx) || |
| !EVP_DigestFinal_ex(tmp_ctx.get(), m, &m_len)) { |
| return 0; |
| } |
| |
| bssl::UniquePtr<EVP_PKEY_CTX> pkctx(EVP_PKEY_CTX_new(pkey, nullptr)); |
| if (!pkctx || // |
| !EVP_PKEY_sign_init(pkctx.get()) || |
| !EVP_PKEY_CTX_set_signature_md(pkctx.get(), ctx->digest) || |
| !EVP_PKEY_sign(pkctx.get(), sig, &sig_len, m, m_len)) { |
| return 0; |
| } |
| *out_sig_len = static_cast<unsigned>(sig_len); |
| return 1; |
| } |
| |
| int EVP_VerifyInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) { |
| return EVP_DigestInit_ex(ctx, type, impl); |
| } |
| |
| int EVP_VerifyInit(EVP_MD_CTX *ctx, const EVP_MD *type) { |
| return EVP_DigestInit(ctx, type); |
| } |
| |
| int EVP_VerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { |
| return EVP_DigestUpdate(ctx, data, len); |
| } |
| |
| int EVP_VerifyFinal(EVP_MD_CTX *ctx, const uint8_t *sig, size_t sig_len, |
| EVP_PKEY *pkey) { |
| uint8_t m[EVP_MAX_MD_SIZE]; |
| unsigned m_len; |
| bssl::ScopedEVP_MD_CTX tmp_ctx; |
| if (!EVP_MD_CTX_copy_ex(tmp_ctx.get(), ctx) || |
| !EVP_DigestFinal_ex(tmp_ctx.get(), m, &m_len)) { |
| return 0; |
| } |
| |
| bssl::UniquePtr<EVP_PKEY_CTX> pkctx(EVP_PKEY_CTX_new(pkey, nullptr)); |
| if (!pkctx || |
| !EVP_PKEY_verify_init(pkctx.get()) || |
| !EVP_PKEY_CTX_set_signature_md(pkctx.get(), ctx->digest)) { |
| return 0; |
| } |
| return EVP_PKEY_verify(pkctx.get(), sig, sig_len, m, m_len); |
| } |
| |