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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 #ifndef BASE_CRYPTO_RSA_PRIVATE_KEY_H_ | |
| 6 #define BASE_CRYPTO_RSA_PRIVATE_KEY_H_ | |
| 7 #pragma once | |
| 8 | |
| 9 #include "build/build_config.h" | |
| 10 | |
| 11 #if defined(USE_OPENSSL) | |
| 12 // Forward declaration for openssl/*.h | |
| 13 typedef struct evp_pkey_st EVP_PKEY; | |
| 14 #elif defined(USE_NSS) | |
| 15 // Forward declaration. | |
| 16 struct SECKEYPrivateKeyStr; | |
| 17 struct SECKEYPublicKeyStr; | |
| 18 #elif defined(OS_MACOSX) | |
| 19 #include <Security/cssm.h> | |
| 20 #endif | |
| 21 | |
| 22 #include <list> | |
| 23 #include <vector> | |
| 24 | |
| 25 #include "base/base_api.h" | |
| 26 #include "base/basictypes.h" | |
| 27 | |
| 28 #if defined(OS_WIN) | |
| 29 #include "base/crypto/scoped_capi_types.h" | |
| 30 #endif | |
| 31 #if defined(USE_NSS) | |
| 32 #include "base/gtest_prod_util.h" | |
| 33 #endif | |
| 34 | |
| 35 namespace base { | |
| 36 | |
| 37 // Used internally by RSAPrivateKey for serializing and deserializing | |
| 38 // PKCS #8 PrivateKeyInfo and PublicKeyInfo. | |
| 39 class BASE_API PrivateKeyInfoCodec { | |
| 40 public: | |
| 41 | |
| 42 // ASN.1 encoding of the AlgorithmIdentifier from PKCS #8. | |
| 43 static const uint8 kRsaAlgorithmIdentifier[]; | |
| 44 | |
| 45 // ASN.1 tags for some types we use. | |
| 46 static const uint8 kBitStringTag = 0x03; | |
| 47 static const uint8 kIntegerTag = 0x02; | |
| 48 static const uint8 kNullTag = 0x05; | |
| 49 static const uint8 kOctetStringTag = 0x04; | |
| 50 static const uint8 kSequenceTag = 0x30; | |
| 51 | |
| 52 // |big_endian| here specifies the byte-significance of the integer components | |
| 53 // that will be parsed & serialized (modulus(), etc...) during Import(), | |
| 54 // Export() and ExportPublicKeyInfo() -- not the ASN.1 DER encoding of the | |
| 55 // PrivateKeyInfo/PublicKeyInfo (which is always big-endian). | |
| 56 explicit PrivateKeyInfoCodec(bool big_endian); | |
| 57 | |
| 58 ~PrivateKeyInfoCodec(); | |
| 59 | |
| 60 // Exports the contents of the integer components to the ASN.1 DER encoding | |
| 61 // of the PrivateKeyInfo structure to |output|. | |
| 62 bool Export(std::vector<uint8>* output); | |
| 63 | |
| 64 // Exports the contents of the integer components to the ASN.1 DER encoding | |
| 65 // of the PublicKeyInfo structure to |output|. | |
| 66 bool ExportPublicKeyInfo(std::vector<uint8>* output); | |
| 67 | |
| 68 // Exports the contents of the integer components to the ASN.1 DER encoding | |
| 69 // of the RSAPublicKey structure to |output|. | |
| 70 bool ExportPublicKey(std::vector<uint8>* output); | |
| 71 | |
| 72 // Parses the ASN.1 DER encoding of the PrivateKeyInfo structure in |input| | |
| 73 // and populates the integer components with |big_endian_| byte-significance. | |
| 74 // IMPORTANT NOTE: This is currently *not* security-approved for importing | |
| 75 // keys from unstrusted sources. | |
| 76 bool Import(const std::vector<uint8>& input); | |
| 77 | |
| 78 // Accessors to the contents of the integer components of the PrivateKeyInfo | |
| 79 // structure. | |
| 80 std::vector<uint8>* modulus() { return &modulus_; }; | |
| 81 std::vector<uint8>* public_exponent() { return &public_exponent_; }; | |
| 82 std::vector<uint8>* private_exponent() { return &private_exponent_; }; | |
| 83 std::vector<uint8>* prime1() { return &prime1_; }; | |
| 84 std::vector<uint8>* prime2() { return &prime2_; }; | |
| 85 std::vector<uint8>* exponent1() { return &exponent1_; }; | |
| 86 std::vector<uint8>* exponent2() { return &exponent2_; }; | |
| 87 std::vector<uint8>* coefficient() { return &coefficient_; }; | |
| 88 | |
| 89 private: | |
| 90 // Utility wrappers for PrependIntegerImpl that use the class's |big_endian_| | |
| 91 // value. | |
| 92 void PrependInteger(const std::vector<uint8>& in, std::list<uint8>* out); | |
| 93 void PrependInteger(uint8* val, int num_bytes, std::list<uint8>* data); | |
| 94 | |
| 95 // Prepends the integer stored in |val| - |val + num_bytes| with |big_endian| | |
| 96 // byte-significance into |data| as an ASN.1 integer. | |
| 97 void PrependIntegerImpl(uint8* val, | |
| 98 int num_bytes, | |
| 99 std::list<uint8>* data, | |
| 100 bool big_endian); | |
| 101 | |
| 102 // Utility wrappers for ReadIntegerImpl that use the class's |big_endian_| | |
| 103 // value. | |
| 104 bool ReadInteger(uint8** pos, uint8* end, std::vector<uint8>* out); | |
| 105 bool ReadIntegerWithExpectedSize(uint8** pos, | |
| 106 uint8* end, | |
| 107 size_t expected_size, | |
| 108 std::vector<uint8>* out); | |
| 109 | |
| 110 // Reads an ASN.1 integer from |pos|, and stores the result into |out| with | |
| 111 // |big_endian| byte-significance. | |
| 112 bool ReadIntegerImpl(uint8** pos, | |
| 113 uint8* end, | |
| 114 std::vector<uint8>* out, | |
| 115 bool big_endian); | |
| 116 | |
| 117 // Prepends the integer stored in |val|, starting a index |start|, for | |
| 118 // |num_bytes| bytes onto |data|. | |
| 119 void PrependBytes(uint8* val, | |
| 120 int start, | |
| 121 int num_bytes, | |
| 122 std::list<uint8>* data); | |
| 123 | |
| 124 // Helper to prepend an ASN.1 length field. | |
| 125 void PrependLength(size_t size, std::list<uint8>* data); | |
| 126 | |
| 127 // Helper to prepend an ASN.1 type header. | |
| 128 void PrependTypeHeaderAndLength(uint8 type, | |
| 129 uint32 length, | |
| 130 std::list<uint8>* output); | |
| 131 | |
| 132 // Helper to prepend an ASN.1 bit string | |
| 133 void PrependBitString(uint8* val, int num_bytes, std::list<uint8>* output); | |
| 134 | |
| 135 // Read an ASN.1 length field. This also checks that the length does not | |
| 136 // extend beyond |end|. | |
| 137 bool ReadLength(uint8** pos, uint8* end, uint32* result); | |
| 138 | |
| 139 // Read an ASN.1 type header and its length. | |
| 140 bool ReadTypeHeaderAndLength(uint8** pos, | |
| 141 uint8* end, | |
| 142 uint8 expected_tag, | |
| 143 uint32* length); | |
| 144 | |
| 145 // Read an ASN.1 sequence declaration. This consumes the type header and | |
| 146 // length field, but not the contents of the sequence. | |
| 147 bool ReadSequence(uint8** pos, uint8* end); | |
| 148 | |
| 149 // Read the RSA AlgorithmIdentifier. | |
| 150 bool ReadAlgorithmIdentifier(uint8** pos, uint8* end); | |
| 151 | |
| 152 // Read one of the two version fields in PrivateKeyInfo. | |
| 153 bool ReadVersion(uint8** pos, uint8* end); | |
| 154 | |
| 155 // The byte-significance of the stored components (modulus, etc..). | |
| 156 bool big_endian_; | |
| 157 | |
| 158 // Component integers of the PrivateKeyInfo | |
| 159 std::vector<uint8> modulus_; | |
| 160 std::vector<uint8> public_exponent_; | |
| 161 std::vector<uint8> private_exponent_; | |
| 162 std::vector<uint8> prime1_; | |
| 163 std::vector<uint8> prime2_; | |
| 164 std::vector<uint8> exponent1_; | |
| 165 std::vector<uint8> exponent2_; | |
| 166 std::vector<uint8> coefficient_; | |
| 167 | |
| 168 DISALLOW_COPY_AND_ASSIGN(PrivateKeyInfoCodec); | |
| 169 }; | |
| 170 | |
| 171 // Encapsulates an RSA private key. Can be used to generate new keys, export | |
| 172 // keys to other formats, or to extract a public key. | |
| 173 // TODO(hclam): This class should be ref-counted so it can be reused easily. | |
| 174 class BASE_API RSAPrivateKey { | |
| 175 public: | |
| 176 ~RSAPrivateKey(); | |
| 177 | |
| 178 // Create a new random instance. Can return NULL if initialization fails. | |
| 179 static RSAPrivateKey* Create(uint16 num_bits); | |
| 180 | |
| 181 // Create a new random instance. Can return NULL if initialization fails. | |
| 182 // The created key is permanent and is not exportable in plaintext form. | |
| 183 // | |
| 184 // NOTE: Currently only available if USE_NSS is defined. | |
| 185 static RSAPrivateKey* CreateSensitive(uint16 num_bits); | |
| 186 | |
| 187 // Create a new instance by importing an existing private key. The format is | |
| 188 // an ASN.1-encoded PrivateKeyInfo block from PKCS #8. This can return NULL if | |
| 189 // initialization fails. | |
| 190 static RSAPrivateKey* CreateFromPrivateKeyInfo( | |
| 191 const std::vector<uint8>& input); | |
| 192 | |
| 193 // Create a new instance by importing an existing private key. The format is | |
| 194 // an ASN.1-encoded PrivateKeyInfo block from PKCS #8. This can return NULL if | |
| 195 // initialization fails. | |
| 196 // The created key is permanent and is not exportable in plaintext form. | |
| 197 // | |
| 198 // NOTE: Currently only available if USE_NSS is defined. | |
| 199 static RSAPrivateKey* CreateSensitiveFromPrivateKeyInfo( | |
| 200 const std::vector<uint8>& input); | |
| 201 | |
| 202 // Import an existing public key, and then search for the private | |
| 203 // half in the key database. The format of the public key blob is is | |
| 204 // an X509 SubjectPublicKeyInfo block. This can return NULL if | |
| 205 // initialization fails or the private key cannot be found. The | |
| 206 // caller takes ownership of the returned object, but nothing new is | |
| 207 // created in the key database. | |
| 208 // | |
| 209 // NOTE: Currently only available if USE_NSS is defined. | |
| 210 static RSAPrivateKey* FindFromPublicKeyInfo( | |
| 211 const std::vector<uint8>& input); | |
| 212 | |
| 213 #if defined(USE_OPENSSL) | |
| 214 EVP_PKEY* key() { return key_; } | |
| 215 #elif defined(USE_NSS) | |
| 216 SECKEYPrivateKeyStr* key() { return key_; } | |
| 217 SECKEYPublicKeyStr* public_key() { return public_key_; } | |
| 218 #elif defined(OS_WIN) | |
| 219 HCRYPTPROV provider() { return provider_; } | |
| 220 HCRYPTKEY key() { return key_; } | |
| 221 #elif defined(OS_MACOSX) | |
| 222 CSSM_KEY_PTR key() { return &key_; } | |
| 223 CSSM_KEY_PTR public_key() { return &public_key_; } | |
| 224 #endif | |
| 225 | |
| 226 // Exports the private key to a PKCS #1 PrivateKey block. | |
| 227 bool ExportPrivateKey(std::vector<uint8>* output); | |
| 228 | |
| 229 // Exports the public key to an X509 SubjectPublicKeyInfo block. | |
| 230 bool ExportPublicKey(std::vector<uint8>* output); | |
| 231 | |
| 232 private: | |
| 233 #if defined(USE_NSS) | |
| 234 FRIEND_TEST_ALL_PREFIXES(RSAPrivateKeyNSSTest, FindFromPublicKey); | |
| 235 FRIEND_TEST_ALL_PREFIXES(RSAPrivateKeyNSSTest, FailedFindFromPublicKey); | |
| 236 #endif | |
| 237 | |
| 238 // Constructor is private. Use one of the Create*() or Find*() | |
| 239 // methods above instead. | |
| 240 RSAPrivateKey(); | |
| 241 | |
| 242 // Shared helper for Create() and CreateSensitive(). | |
| 243 // TODO(cmasone): consider replacing |permanent| and |sensitive| with a | |
| 244 // flags arg created by ORing together some enumerated values. | |
| 245 static RSAPrivateKey* CreateWithParams(uint16 num_bits, | |
| 246 bool permanent, | |
| 247 bool sensitive); | |
| 248 | |
| 249 // Shared helper for CreateFromPrivateKeyInfo() and | |
| 250 // CreateSensitiveFromPrivateKeyInfo(). | |
| 251 static RSAPrivateKey* CreateFromPrivateKeyInfoWithParams( | |
| 252 const std::vector<uint8>& input, bool permanent, bool sensitive); | |
| 253 | |
| 254 #if defined(USE_OPENSSL) | |
| 255 EVP_PKEY* key_; | |
| 256 #elif defined(USE_NSS) | |
| 257 SECKEYPrivateKeyStr* key_; | |
| 258 SECKEYPublicKeyStr* public_key_; | |
| 259 #elif defined(OS_WIN) | |
| 260 bool InitProvider(); | |
| 261 | |
| 262 ScopedHCRYPTPROV provider_; | |
| 263 ScopedHCRYPTKEY key_; | |
| 264 #elif defined(OS_MACOSX) | |
| 265 CSSM_KEY key_; | |
| 266 CSSM_KEY public_key_; | |
| 267 #endif | |
| 268 | |
| 269 DISALLOW_COPY_AND_ASSIGN(RSAPrivateKey); | |
| 270 }; | |
| 271 | |
| 272 } // namespace base | |
| 273 | |
| 274 #endif // BASE_CRYPTO_RSA_PRIVATE_KEY_H_ | |
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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/