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1 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved. | 1 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved. |
2 * Use of this source code is governed by a BSD-style license that can be | 2 * Use of this source code is governed by a BSD-style license that can be |
3 * found in the LICENSE file. | 3 * found in the LICENSE file. |
4 */ | 4 */ |
5 | 5 |
6 /* Implementation of RSA signature verification which uses a pre-processed | 6 /* Implementation of RSA signature verification which uses a pre-processed |
7 * key for computation. The code extends Android's RSA verification code to | 7 * key for computation. The code extends Android's RSA verification code to |
8 * support multiple RSA key lengths and hash digest algorithms. | 8 * support multiple RSA key lengths and hash digest algorithms. |
9 */ | 9 */ |
10 | 10 |
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127 int RSAVerify(const RSAPublicKey *key, | 127 int RSAVerify(const RSAPublicKey *key, |
128 const uint8_t *sig, | 128 const uint8_t *sig, |
129 const uint32_t sig_len, | 129 const uint32_t sig_len, |
130 const uint8_t sig_type, | 130 const uint8_t sig_type, |
131 const uint8_t *hash) { | 131 const uint8_t *hash) { |
132 int i; | 132 int i; |
133 uint8_t* buf; | 133 uint8_t* buf; |
134 const uint8_t* padding; | 134 const uint8_t* padding; |
135 int success = 1; | 135 int success = 1; |
136 | 136 |
| 137 if (!key || !sig || !hash) |
| 138 return 0; |
| 139 |
137 if (sig_len != (key->len * sizeof(uint32_t))) { | 140 if (sig_len != (key->len * sizeof(uint32_t))) { |
138 VBDEBUG(("Signature is of incorrect length!\n")); | 141 VBDEBUG(("Signature is of incorrect length!\n")); |
139 return 0; | 142 return 0; |
140 } | 143 } |
141 | 144 |
142 if (sig_type >= kNumAlgorithms) { | 145 if (sig_type >= kNumAlgorithms) { |
143 VBDEBUG(("Invalid signature type!\n")); | 146 VBDEBUG(("Invalid signature type!\n")); |
144 return 0; | 147 return 0; |
145 } | 148 } |
146 | 149 |
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176 VBDEBUG(("Digest: Expecting = %02x Got = %02x\n", padding[i], buf[i])); | 179 VBDEBUG(("Digest: Expecting = %02x Got = %02x\n", padding[i], buf[i])); |
177 #endif | 180 #endif |
178 success = 0; | 181 success = 0; |
179 } | 182 } |
180 } | 183 } |
181 | 184 |
182 Free(buf); | 185 Free(buf); |
183 | 186 |
184 return success; | 187 return success; |
185 } | 188 } |
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