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| 1 // Copyright (c) 2011 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 "base/crypto/rsa_private_key.h" | |
| 6 | |
| 7 #include <list> | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 #include "base/memory/scoped_ptr.h" | |
| 11 #include "base/string_util.h" | |
| 12 | |
| 13 namespace { | |
| 14 // Helper for error handling during key import. | |
| 15 #define READ_ASSERT(truth) \ | |
| 16 if (!(truth)) { \ | |
| 17 NOTREACHED(); \ | |
| 18 return false; \ | |
| 19 } | |
| 20 } // namespace | |
| 21 | |
| 22 namespace base { | |
| 23 | |
| 24 // static | |
| 25 RSAPrivateKey* RSAPrivateKey::Create(uint16 num_bits) { | |
| 26 scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey); | |
| 27 if (!result->InitProvider()) | |
| 28 return NULL; | |
| 29 | |
| 30 DWORD flags = CRYPT_EXPORTABLE; | |
| 31 | |
| 32 // The size is encoded as the upper 16 bits of the flags. :: sigh ::. | |
| 33 flags |= (num_bits << 16); | |
| 34 if (!CryptGenKey(result->provider_, CALG_RSA_SIGN, flags, | |
| 35 result->key_.receive())) | |
| 36 return NULL; | |
| 37 | |
| 38 return result.release(); | |
| 39 } | |
| 40 | |
| 41 // static | |
| 42 RSAPrivateKey* RSAPrivateKey::CreateSensitive(uint16 num_bits) { | |
| 43 NOTIMPLEMENTED(); | |
| 44 return NULL; | |
| 45 } | |
| 46 | |
| 47 // static | |
| 48 RSAPrivateKey* RSAPrivateKey::CreateFromPrivateKeyInfo( | |
| 49 const std::vector<uint8>& input) { | |
| 50 scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey); | |
| 51 if (!result->InitProvider()) | |
| 52 return NULL; | |
| 53 | |
| 54 PrivateKeyInfoCodec pki(false); // Little-Endian | |
| 55 pki.Import(input); | |
| 56 | |
| 57 int blob_size = sizeof(PUBLICKEYSTRUC) + | |
| 58 sizeof(RSAPUBKEY) + | |
| 59 pki.modulus()->size() + | |
| 60 pki.prime1()->size() + | |
| 61 pki.prime2()->size() + | |
| 62 pki.exponent1()->size() + | |
| 63 pki.exponent2()->size() + | |
| 64 pki.coefficient()->size() + | |
| 65 pki.private_exponent()->size(); | |
| 66 scoped_array<BYTE> blob(new BYTE[blob_size]); | |
| 67 | |
| 68 uint8* dest = blob.get(); | |
| 69 PUBLICKEYSTRUC* public_key_struc = reinterpret_cast<PUBLICKEYSTRUC*>(dest); | |
| 70 public_key_struc->bType = PRIVATEKEYBLOB; | |
| 71 public_key_struc->bVersion = 0x02; | |
| 72 public_key_struc->reserved = 0; | |
| 73 public_key_struc->aiKeyAlg = CALG_RSA_SIGN; | |
| 74 dest += sizeof(PUBLICKEYSTRUC); | |
| 75 | |
| 76 RSAPUBKEY* rsa_pub_key = reinterpret_cast<RSAPUBKEY*>(dest); | |
| 77 rsa_pub_key->magic = 0x32415352; | |
| 78 rsa_pub_key->bitlen = pki.modulus()->size() * 8; | |
| 79 int public_exponent_int = 0; | |
| 80 for (size_t i = pki.public_exponent()->size(); i > 0; --i) { | |
| 81 public_exponent_int <<= 8; | |
| 82 public_exponent_int |= (*pki.public_exponent())[i - 1]; | |
| 83 } | |
| 84 rsa_pub_key->pubexp = public_exponent_int; | |
| 85 dest += sizeof(RSAPUBKEY); | |
| 86 | |
| 87 memcpy(dest, &pki.modulus()->front(), pki.modulus()->size()); | |
| 88 dest += pki.modulus()->size(); | |
| 89 memcpy(dest, &pki.prime1()->front(), pki.prime1()->size()); | |
| 90 dest += pki.prime1()->size(); | |
| 91 memcpy(dest, &pki.prime2()->front(), pki.prime2()->size()); | |
| 92 dest += pki.prime2()->size(); | |
| 93 memcpy(dest, &pki.exponent1()->front(), pki.exponent1()->size()); | |
| 94 dest += pki.exponent1()->size(); | |
| 95 memcpy(dest, &pki.exponent2()->front(), pki.exponent2()->size()); | |
| 96 dest += pki.exponent2()->size(); | |
| 97 memcpy(dest, &pki.coefficient()->front(), pki.coefficient()->size()); | |
| 98 dest += pki.coefficient()->size(); | |
| 99 memcpy(dest, &pki.private_exponent()->front(), | |
| 100 pki.private_exponent()->size()); | |
| 101 dest += pki.private_exponent()->size(); | |
| 102 | |
| 103 READ_ASSERT(dest == blob.get() + blob_size); | |
| 104 if (!CryptImportKey(result->provider_, | |
| 105 reinterpret_cast<uint8*>(public_key_struc), blob_size, 0, | |
| 106 CRYPT_EXPORTABLE, result->key_.receive())) | |
| 107 return NULL; | |
| 108 | |
| 109 return result.release(); | |
| 110 } | |
| 111 | |
| 112 // static | |
| 113 RSAPrivateKey* RSAPrivateKey::CreateSensitiveFromPrivateKeyInfo( | |
| 114 const std::vector<uint8>& input) { | |
| 115 NOTIMPLEMENTED(); | |
| 116 return NULL; | |
| 117 } | |
| 118 | |
| 119 // static | |
| 120 RSAPrivateKey* RSAPrivateKey::FindFromPublicKeyInfo( | |
| 121 const std::vector<uint8>& input) { | |
| 122 NOTIMPLEMENTED(); | |
| 123 return NULL; | |
| 124 } | |
| 125 | |
| 126 RSAPrivateKey::RSAPrivateKey() : provider_(NULL), key_(NULL) {} | |
| 127 | |
| 128 RSAPrivateKey::~RSAPrivateKey() {} | |
| 129 | |
| 130 bool RSAPrivateKey::InitProvider() { | |
| 131 return FALSE != CryptAcquireContext(provider_.receive(), NULL, NULL, | |
| 132 PROV_RSA_FULL, CRYPT_VERIFYCONTEXT); | |
| 133 } | |
| 134 | |
| 135 bool RSAPrivateKey::ExportPrivateKey(std::vector<uint8>* output) { | |
| 136 // Export the key | |
| 137 DWORD blob_length = 0; | |
| 138 if (!CryptExportKey(key_, 0, PRIVATEKEYBLOB, 0, NULL, &blob_length)) { | |
| 139 NOTREACHED(); | |
| 140 return false; | |
| 141 } | |
| 142 | |
| 143 scoped_array<uint8> blob(new uint8[blob_length]); | |
| 144 if (!CryptExportKey(key_, 0, PRIVATEKEYBLOB, 0, blob.get(), &blob_length)) { | |
| 145 NOTREACHED(); | |
| 146 return false; | |
| 147 } | |
| 148 | |
| 149 uint8* pos = blob.get(); | |
| 150 PUBLICKEYSTRUC *publickey_struct = reinterpret_cast<PUBLICKEYSTRUC*>(pos); | |
| 151 pos += sizeof(PUBLICKEYSTRUC); | |
| 152 | |
| 153 RSAPUBKEY *rsa_pub_key = reinterpret_cast<RSAPUBKEY*>(pos); | |
| 154 pos += sizeof(RSAPUBKEY); | |
| 155 | |
| 156 int mod_size = rsa_pub_key->bitlen / 8; | |
| 157 int primes_size = rsa_pub_key->bitlen / 16; | |
| 158 | |
| 159 PrivateKeyInfoCodec pki(false); // Little-Endian | |
| 160 | |
| 161 pki.modulus()->assign(pos, pos + mod_size); | |
| 162 pos += mod_size; | |
| 163 | |
| 164 pki.prime1()->assign(pos, pos + primes_size); | |
| 165 pos += primes_size; | |
| 166 pki.prime2()->assign(pos, pos + primes_size); | |
| 167 pos += primes_size; | |
| 168 | |
| 169 pki.exponent1()->assign(pos, pos + primes_size); | |
| 170 pos += primes_size; | |
| 171 pki.exponent2()->assign(pos, pos + primes_size); | |
| 172 pos += primes_size; | |
| 173 | |
| 174 pki.coefficient()->assign(pos, pos + primes_size); | |
| 175 pos += primes_size; | |
| 176 | |
| 177 pki.private_exponent()->assign(pos, pos + mod_size); | |
| 178 pos += mod_size; | |
| 179 | |
| 180 pki.public_exponent()->assign(reinterpret_cast<uint8*>(&rsa_pub_key->pubexp), | |
| 181 reinterpret_cast<uint8*>(&rsa_pub_key->pubexp) + 4); | |
| 182 | |
| 183 CHECK_EQ(pos - blob_length, reinterpret_cast<BYTE*>(publickey_struct)); | |
| 184 | |
| 185 return pki.Export(output); | |
| 186 } | |
| 187 | |
| 188 bool RSAPrivateKey::ExportPublicKey(std::vector<uint8>* output) { | |
| 189 DWORD key_info_len; | |
| 190 if (!CryptExportPublicKeyInfo( | |
| 191 provider_, AT_SIGNATURE, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, | |
| 192 NULL, &key_info_len)) { | |
| 193 NOTREACHED(); | |
| 194 return false; | |
| 195 } | |
| 196 | |
| 197 scoped_array<uint8> key_info(new uint8[key_info_len]); | |
| 198 if (!CryptExportPublicKeyInfo( | |
| 199 provider_, AT_SIGNATURE, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, | |
| 200 reinterpret_cast<CERT_PUBLIC_KEY_INFO*>(key_info.get()), &key_info_len)) { | |
| 201 NOTREACHED(); | |
| 202 return false; | |
| 203 } | |
| 204 | |
| 205 DWORD encoded_length; | |
| 206 if (!CryptEncodeObject( | |
| 207 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, X509_PUBLIC_KEY_INFO, | |
| 208 reinterpret_cast<CERT_PUBLIC_KEY_INFO*>(key_info.get()), NULL, | |
| 209 &encoded_length)) { | |
| 210 NOTREACHED(); | |
| 211 return false; | |
| 212 } | |
| 213 | |
| 214 scoped_array<BYTE> encoded(new BYTE[encoded_length]); | |
| 215 if (!CryptEncodeObject( | |
| 216 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, X509_PUBLIC_KEY_INFO, | |
| 217 reinterpret_cast<CERT_PUBLIC_KEY_INFO*>(key_info.get()), encoded.get(), | |
| 218 &encoded_length)) { | |
| 219 NOTREACHED(); | |
| 220 return false; | |
| 221 } | |
| 222 | |
| 223 for (size_t i = 0; i < encoded_length; ++i) | |
| 224 output->push_back(encoded[i]); | |
| 225 | |
| 226 return true; | |
| 227 } | |
| 228 | |
| 229 } // namespace base | |
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Chromium Code Reviews
Issue 6805019:
Move crypto files out of base, to a top level directory. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/