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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 | |
| 10 #include "base/logging.h" | |
| 11 #include "base/memory/scoped_ptr.h" | |
| 12 #include "base/stl_util.h" | |
| 13 #include "crypto/openssl_util.h" | |
| 14 #include "crypto/rsa_private_key.h" | |
| 15 #include "crypto/scoped_openssl_types.h" | |
| 16 | |
| 17 namespace crypto { | |
| 18 | |
| 19 namespace { | |
| 20 | |
| 21 const EVP_MD* ToOpenSSLDigest(SignatureCreator::HashAlgorithm hash_alg) { | |
| 22 switch (hash_alg) { | |
| 23 case SignatureCreator::SHA1: | |
| 24 return EVP_sha1(); | |
| 25 case SignatureCreator::SHA256: | |
| 26 return EVP_sha256(); | |
| 27 } | |
| 28 return NULL; | |
| 29 } | |
| 30 | |
| 31 int ToOpenSSLDigestType(SignatureCreator::HashAlgorithm hash_alg) { | |
| 32 switch (hash_alg) { | |
| 33 case SignatureCreator::SHA1: | |
| 34 return NID_sha1; | |
| 35 case SignatureCreator::SHA256: | |
| 36 return NID_sha256; | |
| 37 } | |
| 38 return NID_undef; | |
| 39 } | |
| 40 | |
| 41 } // namespace | |
| 42 | |
| 43 // static | |
| 44 SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key, | |
| 45 HashAlgorithm hash_alg) { | |
| 46 OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 47 scoped_ptr<SignatureCreator> result(new SignatureCreator); | |
| 48 const EVP_MD* const digest = ToOpenSSLDigest(hash_alg); | |
| 49 DCHECK(digest); | |
| 50 if (!digest) { | |
| 51 return NULL; | |
| 52 } | |
| 53 if (!EVP_DigestSignInit(result->sign_context_, NULL, digest, NULL, | |
| 54 key->key())) { | |
| 55 return NULL; | |
| 56 } | |
| 57 return result.release(); | |
| 58 } | |
| 59 | |
| 60 // static | |
| 61 bool SignatureCreator::Sign(RSAPrivateKey* key, | |
| 62 HashAlgorithm hash_alg, | |
| 63 const uint8* data, | |
| 64 int data_len, | |
| 65 std::vector<uint8>* signature) { | |
| 66 ScopedRSA rsa_key(EVP_PKEY_get1_RSA(key->key())); | |
| 67 if (!rsa_key) | |
| 68 return false; | |
| 69 signature->resize(RSA_size(rsa_key.get())); | |
| 70 | |
| 71 unsigned int len = 0; | |
| 72 if (!RSA_sign(ToOpenSSLDigestType(hash_alg), data, data_len, | |
| 73 vector_as_array(signature), &len, rsa_key.get())) { | |
| 74 signature->clear(); | |
| 75 return false; | |
| 76 } | |
| 77 signature->resize(len); | |
| 78 return true; | |
| 79 } | |
| 80 | |
| 81 SignatureCreator::SignatureCreator() | |
| 82 : sign_context_(EVP_MD_CTX_create()) { | |
| 83 } | |
| 84 | |
| 85 SignatureCreator::~SignatureCreator() { | |
| 86 EVP_MD_CTX_destroy(sign_context_); | |
| 87 } | |
| 88 | |
| 89 bool SignatureCreator::Update(const uint8* data_part, int data_part_len) { | |
| 90 OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 91 return !!EVP_DigestSignUpdate(sign_context_, data_part, data_part_len); | |
| 92 } | |
| 93 | |
| 94 bool SignatureCreator::Final(std::vector<uint8>* signature) { | |
| 95 OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 96 | |
| 97 // Determine the maximum length of the signature. | |
| 98 size_t len = 0; | |
| 99 if (!EVP_DigestSignFinal(sign_context_, NULL, &len)) { | |
| 100 signature->clear(); | |
| 101 return false; | |
| 102 } | |
| 103 signature->resize(len); | |
| 104 | |
| 105 // Sign it. | |
| 106 if (!EVP_DigestSignFinal(sign_context_, vector_as_array(signature), &len)) { | |
| 107 signature->clear(); | |
| 108 return false; | |
| 109 } | |
| 110 signature->resize(len); | |
| 111 return true; | |
| 112 } | |
| 113 | |
| 114 } // namespace crypto | |
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Chromium Code Reviews
Issue 956613002:
Reland "Cut down /crypto and switch what is left of it to boringssl". (Closed)
Base URL: git@github.com:domokit/mojo.git@master