Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 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 "crypto/rsa_private_key.h" |
| 6 | |
| 7 | #include <cryptohi.h> |
| 8 | #include <keyhi.h> |
| 9 | #include <pk11pub.h> |
| 10 | #include <secmod.h> |
| 11 | |
| 12 | #include <list> |
| 13 | |
| 14 | #include "base/debug/leak_annotations.h" |
| 15 | #include "base/logging.h" |
| 16 | #include "base/memory/scoped_ptr.h" |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 17 | #include "base/strings/string_util.h" |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 18 | #include "crypto/nss_util.h" |
| 19 | #include "crypto/nss_util_internal.h" |
| 20 | #include "crypto/scoped_nss_types.h" |
| 21 | |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 22 | // TODO(rafaelw): Consider using NSS's ASN.1 encoder. |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 23 | namespace { |
| 24 | |
| 25 | static bool ReadAttribute(SECKEYPrivateKey* key, |
| 26 | CK_ATTRIBUTE_TYPE type, |
| 27 | std::vector<uint8>* output) { |
| 28 | SECItem item; |
| 29 | SECStatus rv; |
| 30 | rv = PK11_ReadRawAttribute(PK11_TypePrivKey, key, type, &item); |
| 31 | if (rv != SECSuccess) { |
| 32 | NOTREACHED(); |
| 33 | return false; |
| 34 | } |
| 35 | |
| 36 | output->assign(item.data, item.data + item.len); |
| 37 | SECITEM_FreeItem(&item, PR_FALSE); |
| 38 | return true; |
| 39 | } |
| 40 | |
| 41 | } // namespace |
| 42 | |
| 43 | namespace crypto { |
| 44 | |
| 45 | RSAPrivateKey::~RSAPrivateKey() { |
| 46 | if (key_) |
| 47 | SECKEY_DestroyPrivateKey(key_); |
| 48 | if (public_key_) |
| 49 | SECKEY_DestroyPublicKey(public_key_); |
| 50 | } |
| 51 | |
| 52 | // static |
| 53 | RSAPrivateKey* RSAPrivateKey::Create(uint16 num_bits) { |
| 54 | return CreateWithParams(num_bits, |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 55 | false /* not permanent */, |
| 56 | false /* not sensitive */); |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | // static |
| 60 | RSAPrivateKey* RSAPrivateKey::CreateFromPrivateKeyInfo( |
| 61 | const std::vector<uint8>& input) { |
| 62 | return CreateFromPrivateKeyInfoWithParams(input, |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 63 | false /* not permanent */, |
| 64 | false /* not sensitive */); |
| 65 | } |
| 66 | |
| 67 | #if defined(USE_NSS) |
| 68 | // static |
| 69 | RSAPrivateKey* RSAPrivateKey::CreateSensitive(uint16 num_bits) { |
| 70 | return CreateWithParams(num_bits, |
| 71 | true /* permanent */, |
| 72 | true /* sensitive */); |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | // static |
| 76 | RSAPrivateKey* RSAPrivateKey::CreateSensitiveFromPrivateKeyInfo( |
| 77 | const std::vector<uint8>& input) { |
| 78 | return CreateFromPrivateKeyInfoWithParams(input, |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 79 | true /* permanent */, |
| 80 | true /* sensitive */); |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | // static |
Torne (Richard Coles) | b2df76e | 2013-05-13 16:52:09 +0100 | [diff] [blame] | 84 | RSAPrivateKey* RSAPrivateKey::CreateFromKey(SECKEYPrivateKey* key) { |
| 85 | DCHECK(key); |
| 86 | if (SECKEY_GetPrivateKeyType(key) != rsaKey) |
| 87 | return NULL; |
| 88 | RSAPrivateKey* copy = new RSAPrivateKey(); |
| 89 | copy->key_ = SECKEY_CopyPrivateKey(key); |
| 90 | copy->public_key_ = SECKEY_ConvertToPublicKey(key); |
| 91 | if (!copy->key_ || !copy->public_key_) { |
| 92 | NOTREACHED(); |
| 93 | delete copy; |
| 94 | return NULL; |
| 95 | } |
| 96 | return copy; |
| 97 | } |
| 98 | |
| 99 | // static |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 100 | RSAPrivateKey* RSAPrivateKey::FindFromPublicKeyInfo( |
| 101 | const std::vector<uint8>& input) { |
| 102 | EnsureNSSInit(); |
| 103 | |
| 104 | scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey); |
| 105 | |
| 106 | // First, decode and save the public key. |
| 107 | SECItem key_der; |
| 108 | key_der.type = siBuffer; |
| 109 | key_der.data = const_cast<unsigned char*>(&input[0]); |
| 110 | key_der.len = input.size(); |
| 111 | |
| 112 | CERTSubjectPublicKeyInfo* spki = |
| 113 | SECKEY_DecodeDERSubjectPublicKeyInfo(&key_der); |
| 114 | if (!spki) { |
| 115 | NOTREACHED(); |
| 116 | return NULL; |
| 117 | } |
| 118 | |
| 119 | result->public_key_ = SECKEY_ExtractPublicKey(spki); |
| 120 | SECKEY_DestroySubjectPublicKeyInfo(spki); |
| 121 | if (!result->public_key_) { |
| 122 | NOTREACHED(); |
| 123 | return NULL; |
| 124 | } |
| 125 | |
| 126 | // Make sure the key is an RSA key. If not, that's an error |
| 127 | if (result->public_key_->keyType != rsaKey) { |
| 128 | NOTREACHED(); |
| 129 | return NULL; |
| 130 | } |
| 131 | |
| 132 | ScopedSECItem ck_id( |
| 133 | PK11_MakeIDFromPubKey(&(result->public_key_->u.rsa.modulus))); |
| 134 | if (!ck_id.get()) { |
| 135 | NOTREACHED(); |
| 136 | return NULL; |
| 137 | } |
| 138 | |
| 139 | // Search all slots in all modules for the key with the given ID. |
| 140 | AutoSECMODListReadLock auto_lock; |
| 141 | SECMODModuleList* head = SECMOD_GetDefaultModuleList(); |
| 142 | for (SECMODModuleList* item = head; item != NULL; item = item->next) { |
| 143 | int slot_count = item->module->loaded ? item->module->slotCount : 0; |
| 144 | for (int i = 0; i < slot_count; i++) { |
| 145 | // Finally...Look for the key! |
| 146 | result->key_ = PK11_FindKeyByKeyID(item->module->slots[i], |
| 147 | ck_id.get(), NULL); |
| 148 | if (result->key_) |
| 149 | return result.release(); |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | // We didn't find the key. |
| 154 | return NULL; |
| 155 | } |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 156 | #endif |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 157 | |
| 158 | RSAPrivateKey* RSAPrivateKey::Copy() const { |
| 159 | RSAPrivateKey* copy = new RSAPrivateKey(); |
| 160 | copy->key_ = SECKEY_CopyPrivateKey(key_); |
| 161 | copy->public_key_ = SECKEY_CopyPublicKey(public_key_); |
| 162 | return copy; |
| 163 | } |
| 164 | |
| 165 | bool RSAPrivateKey::ExportPrivateKey(std::vector<uint8>* output) const { |
| 166 | PrivateKeyInfoCodec private_key_info(true); |
| 167 | |
| 168 | // Manually read the component attributes of the private key and build up |
| 169 | // the PrivateKeyInfo. |
| 170 | if (!ReadAttribute(key_, CKA_MODULUS, private_key_info.modulus()) || |
| 171 | !ReadAttribute(key_, CKA_PUBLIC_EXPONENT, |
| 172 | private_key_info.public_exponent()) || |
| 173 | !ReadAttribute(key_, CKA_PRIVATE_EXPONENT, |
| 174 | private_key_info.private_exponent()) || |
| 175 | !ReadAttribute(key_, CKA_PRIME_1, private_key_info.prime1()) || |
| 176 | !ReadAttribute(key_, CKA_PRIME_2, private_key_info.prime2()) || |
| 177 | !ReadAttribute(key_, CKA_EXPONENT_1, private_key_info.exponent1()) || |
| 178 | !ReadAttribute(key_, CKA_EXPONENT_2, private_key_info.exponent2()) || |
| 179 | !ReadAttribute(key_, CKA_COEFFICIENT, private_key_info.coefficient())) { |
| 180 | NOTREACHED(); |
| 181 | return false; |
| 182 | } |
| 183 | |
| 184 | return private_key_info.Export(output); |
| 185 | } |
| 186 | |
| 187 | bool RSAPrivateKey::ExportPublicKey(std::vector<uint8>* output) const { |
| 188 | ScopedSECItem der_pubkey(SECKEY_EncodeDERSubjectPublicKeyInfo(public_key_)); |
| 189 | if (!der_pubkey.get()) { |
| 190 | NOTREACHED(); |
| 191 | return false; |
| 192 | } |
| 193 | |
| 194 | output->assign(der_pubkey->data, der_pubkey->data + der_pubkey->len); |
| 195 | return true; |
| 196 | } |
| 197 | |
| 198 | RSAPrivateKey::RSAPrivateKey() : key_(NULL), public_key_(NULL) { |
| 199 | EnsureNSSInit(); |
| 200 | } |
| 201 | |
| 202 | // static |
| 203 | RSAPrivateKey* RSAPrivateKey::CreateWithParams(uint16 num_bits, |
| 204 | bool permanent, |
| 205 | bool sensitive) { |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 206 | #if !defined(USE_NSS) |
| 207 | if (permanent) { |
| 208 | NOTIMPLEMENTED(); |
| 209 | return NULL; |
| 210 | } |
| 211 | #endif |
| 212 | |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 213 | EnsureNSSInit(); |
| 214 | |
| 215 | scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey); |
| 216 | |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 217 | ScopedPK11Slot slot(permanent ? GetPrivateNSSKeySlot() : |
| 218 | PK11_GetInternalSlot()); |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 219 | if (!slot.get()) |
| 220 | return NULL; |
| 221 | |
| 222 | PK11RSAGenParams param; |
| 223 | param.keySizeInBits = num_bits; |
| 224 | param.pe = 65537L; |
| 225 | result->key_ = PK11_GenerateKeyPair(slot.get(), |
| 226 | CKM_RSA_PKCS_KEY_PAIR_GEN, |
| 227 | ¶m, |
| 228 | &result->public_key_, |
| 229 | permanent, |
| 230 | sensitive, |
| 231 | NULL); |
| 232 | if (!result->key_) |
| 233 | return NULL; |
| 234 | |
| 235 | return result.release(); |
| 236 | } |
| 237 | |
| 238 | // static |
| 239 | RSAPrivateKey* RSAPrivateKey::CreateFromPrivateKeyInfoWithParams( |
| 240 | const std::vector<uint8>& input, bool permanent, bool sensitive) { |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 241 | #if !defined(USE_NSS) |
| 242 | if (permanent) { |
| 243 | NOTIMPLEMENTED(); |
| 244 | return NULL; |
| 245 | } |
| 246 | #endif |
| 247 | |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 248 | // This method currently leaks some memory. |
| 249 | // See http://crbug.com/34742. |
| 250 | ANNOTATE_SCOPED_MEMORY_LEAK; |
| 251 | EnsureNSSInit(); |
| 252 | |
| 253 | scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey); |
| 254 | |
Ben Murdoch | eb525c5 | 2013-07-10 11:40:50 +0100 | [diff] [blame] | 255 | ScopedPK11Slot slot(permanent ? GetPrivateNSSKeySlot() : |
| 256 | PK11_GetInternalSlot()); |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 257 | if (!slot.get()) |
| 258 | return NULL; |
| 259 | |
| 260 | SECItem der_private_key_info; |
| 261 | der_private_key_info.data = const_cast<unsigned char*>(&input.front()); |
| 262 | der_private_key_info.len = input.size(); |
| 263 | // Allow the private key to be used for key unwrapping, data decryption, |
| 264 | // and signature generation. |
| 265 | const unsigned int key_usage = KU_KEY_ENCIPHERMENT | KU_DATA_ENCIPHERMENT | |
| 266 | KU_DIGITAL_SIGNATURE; |
| 267 | SECStatus rv = PK11_ImportDERPrivateKeyInfoAndReturnKey( |
| 268 | slot.get(), &der_private_key_info, NULL, NULL, permanent, sensitive, |
| 269 | key_usage, &result->key_, NULL); |
| 270 | if (rv != SECSuccess) { |
| 271 | NOTREACHED(); |
| 272 | return NULL; |
| 273 | } |
| 274 | |
| 275 | result->public_key_ = SECKEY_ConvertToPublicKey(result->key_); |
| 276 | if (!result->public_key_) { |
| 277 | NOTREACHED(); |
| 278 | return NULL; |
| 279 | } |
| 280 | |
| 281 | return result.release(); |
| 282 | } |
| 283 | |
| 284 | } // namespace crypto |