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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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140 if (sig_len != (key->len * sizeof(uint32_t))) { | 140 if (sig_len != (key->len * sizeof(uint32_t))) { |
141 fprintf(stderr, "Signature is of incorrect length!\n"); | 141 fprintf(stderr, "Signature is of incorrect length!\n"); |
142 return 0; | 142 return 0; |
143 } | 143 } |
144 | 144 |
145 if (sig_type >= kNumAlgorithms) { | 145 if (sig_type >= kNumAlgorithms) { |
146 fprintf(stderr, "Invalid signature type!\n"); | 146 fprintf(stderr, "Invalid signature type!\n"); |
147 return 0; | 147 return 0; |
148 } | 148 } |
149 | 149 |
150 if (key->len != siglen_map[sig_type]) { | 150 if (key->len != siglen_map[sig_type] / sizeof(uint32_t)) { |
151 fprintf(stderr, "Wrong key passed in!\n"); | 151 fprintf(stderr, "Wrong key passed in!\n"); |
152 return 0; | 152 return 0; |
153 } | 153 } |
154 | 154 |
155 buf = (uint8_t*) Malloc(sig_len); | 155 buf = (uint8_t*) Malloc(sig_len); |
156 Memcpy(buf, sig, sig_len); | 156 Memcpy(buf, sig, sig_len); |
157 | 157 |
158 modpowF4(key, buf); | 158 modpowF4(key, buf); |
159 | 159 |
160 /* Determine padding to use depending on the signature type. */ | 160 /* Determine padding to use depending on the signature type. */ |
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181 buf[i]); | 181 buf[i]); |
182 #endif | 182 #endif |
183 success = 0; | 183 success = 0; |
184 } | 184 } |
185 } | 185 } |
186 | 186 |
187 Free(buf); | 187 Free(buf); |
188 | 188 |
189 return success; | 189 return success; |
190 } | 190 } |
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