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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "crypto/signature_creator.h" | |
| 6 | |
| 7 #include <openssl/evp.h> | |
| 8 #include <openssl/rsa.h> | |
| 9 #include <stddef.h> | |
| 10 #include <stdint.h> | |
| 11 | |
| 12 #include <memory> | |
| 13 | |
| 14 #include "base/logging.h" | |
| 15 #include "crypto/openssl_util.h" | |
| 16 #include "crypto/rsa_private_key.h" | |
| 17 #include "crypto/scoped_openssl_types.h" | |
| 18 | |
| 19 namespace crypto { | |
| 20 | |
| 21 namespace { | |
| 22 | |
| 23 const EVP_MD* ToOpenSSLDigest(SignatureCreator::HashAlgorithm hash_alg) { | |
| 24 switch (hash_alg) { | |
| 25 case SignatureCreator::SHA1: | |
| 26 return EVP_sha1(); | |
| 27 case SignatureCreator::SHA256: | |
| 28 return EVP_sha256(); | |
| 29 } | |
| 30 return NULL; | |
| 31 } | |
| 32 | |
| 33 int ToOpenSSLDigestType(SignatureCreator::HashAlgorithm hash_alg) { | |
| 34 switch (hash_alg) { | |
| 35 case SignatureCreator::SHA1: | |
| 36 return NID_sha1; | |
| 37 case SignatureCreator::SHA256: | |
| 38 return NID_sha256; | |
| 39 } | |
| 40 return NID_undef; | |
| 41 } | |
| 42 | |
| 43 } // namespace | |
| 44 | |
| 45 // static | |
| 46 SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key, | |
| 47 HashAlgorithm hash_alg) { | |
| 48 OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 49 std::unique_ptr<SignatureCreator> result(new SignatureCreator); | |
| 50 const EVP_MD* const digest = ToOpenSSLDigest(hash_alg); | |
| 51 DCHECK(digest); | |
| 52 if (!digest) { | |
| 53 return NULL; | |
| 54 } | |
| 55 if (!EVP_DigestSignInit(result->sign_context_, NULL, digest, NULL, | |
| 56 key->key())) { | |
| 57 return NULL; | |
| 58 } | |
| 59 return result.release(); | |
| 60 } | |
| 61 | |
| 62 // static | |
| 63 bool SignatureCreator::Sign(RSAPrivateKey* key, | |
| 64 HashAlgorithm hash_alg, | |
| 65 const uint8_t* data, | |
| 66 int data_len, | |
| 67 std::vector<uint8_t>* signature) { | |
| 68 ScopedRSA rsa_key(EVP_PKEY_get1_RSA(key->key())); | |
| 69 if (!rsa_key) | |
| 70 return false; | |
| 71 signature->resize(RSA_size(rsa_key.get())); | |
| 72 | |
| 73 unsigned int len = 0; | |
| 74 if (!RSA_sign(ToOpenSSLDigestType(hash_alg), data, data_len, | |
| 75 signature->data(), &len, rsa_key.get())) { | |
| 76 signature->clear(); | |
| 77 return false; | |
| 78 } | |
| 79 signature->resize(len); | |
| 80 return true; | |
| 81 } | |
| 82 | |
| 83 SignatureCreator::SignatureCreator() | |
| 84 : sign_context_(EVP_MD_CTX_create()) { | |
| 85 } | |
| 86 | |
| 87 SignatureCreator::~SignatureCreator() { | |
| 88 EVP_MD_CTX_destroy(sign_context_); | |
| 89 } | |
| 90 | |
| 91 bool SignatureCreator::Update(const uint8_t* data_part, int data_part_len) { | |
| 92 OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 93 return !!EVP_DigestSignUpdate(sign_context_, data_part, data_part_len); | |
| 94 } | |
| 95 | |
| 96 bool SignatureCreator::Final(std::vector<uint8_t>* signature) { | |
| 97 OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 98 | |
| 99 // Determine the maximum length of the signature. | |
| 100 size_t len = 0; | |
| 101 if (!EVP_DigestSignFinal(sign_context_, NULL, &len)) { | |
| 102 signature->clear(); | |
| 103 return false; | |
| 104 } | |
| 105 signature->resize(len); | |
| 106 | |
| 107 // Sign it. | |
| 108 if (!EVP_DigestSignFinal(sign_context_, signature->data(), &len)) { | |
| 109 signature->clear(); | |
| 110 return false; | |
| 111 } | |
| 112 signature->resize(len); | |
| 113 return true; | |
| 114 } | |
| 115 | |
| 116 } // namespace crypto | |
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Chromium Code Reviews
Issue 1909513003:
Rename crypto/ *_openssl files (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master