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/signature_verifier.h" 6 #include "testing/gtest/include/gtest/gtest.h" 7 8 TEST(SignatureVerifierTest, BasicTest) { 9 // The input data in this test comes from real certificates. 10 // 11 // tbs_certificate ("to-be-signed certificate", the part of a certificate 12 // that is signed), signature_algorithm, and algorithm come from the 13 // certificate of bugs.webkit.org. 14 // 15 // public_key_info comes from the certificate of the issuer, Go Daddy Secure 16 // Certification Authority. 17 // 18 // The bytes in the array initializers are formatted to expose the DER 19 // encoding of the ASN.1 structures. 20 21 // The data that is signed is the following ASN.1 structure: 22 // TBSCertificate ::= SEQUENCE { 23 // ... -- omitted, not important 24 // } 25 const uint8 tbs_certificate[1017] = { 26 0x30, 0x82, 0x03, 0xf5, // a SEQUENCE of length 1013 (0x3f5) 27 0xa0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x03, 0x43, 0xdd, 0x63, 0x30, 0x0d, 28 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 29 0x00, 0x30, 0x81, 0xca, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 30 0x06, 0x13, 0x02, 0x55, 0x53, 0x31, 0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 31 0x04, 0x08, 0x13, 0x07, 0x41, 0x72, 0x69, 0x7a, 0x6f, 0x6e, 0x61, 0x31, 32 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x07, 0x13, 0x0a, 0x53, 0x63, 33 0x6f, 0x74, 0x74, 0x73, 0x64, 0x61, 0x6c, 0x65, 0x31, 0x1a, 0x30, 0x18, 34 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13, 0x11, 0x47, 0x6f, 0x44, 0x61, 0x64, 35 0x64, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x2c, 0x20, 0x49, 0x6e, 0x63, 0x2e, 36 0x31, 0x33, 0x30, 0x31, 0x06, 0x03, 0x55, 0x04, 0x0b, 0x13, 0x2a, 0x68, 37 0x74, 0x74, 0x70, 0x3a, 0x2f, 0x2f, 0x63, 0x65, 0x72, 0x74, 0x69, 0x66, 38 0x69, 0x63, 0x61, 0x74, 0x65, 0x73, 0x2e, 0x67, 0x6f, 0x64, 0x61, 0x64, 39 0x64, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x72, 0x65, 0x70, 0x6f, 0x73, 40 0x69, 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0x96, 0xad, 0xff, 67 0x2a, 0x6d, 0x0e, 0xba, 0x52, 0x84, 0x83, 0xb0, 0x39, 0xee, 0xc9, 0x39, 68 0xdc, 0x1e, 0x34, 0xd0, 0xd8, 0x5d, 0x7a, 0x09, 0xac, 0xa9, 0xee, 0xca, 69 0x65, 0xf6, 0x85, 0x3a, 0x6b, 0xee, 0xe4, 0x5c, 0x5e, 0xf8, 0xda, 0xd1, 70 0xce, 0x88, 0x47, 0xcd, 0x06, 0x21, 0xe0, 0xb9, 0x4b, 0xe4, 0x07, 0xcb, 71 0x57, 0xdc, 0xca, 0x99, 0x54, 0xf7, 0x0e, 0xd5, 0x17, 0x95, 0x05, 0x2e, 72 0xe9, 0xb1, 0x02, 0x03, 0x01, 0x00, 0x01, 0xa3, 0x82, 0x01, 0xce, 0x30, 73 0x82, 0x01, 0xca, 0x30, 0x09, 0x06, 0x03, 0x55, 0x1d, 0x13, 0x04, 0x02, 74 0x30, 0x00, 0x30, 0x0b, 0x06, 0x03, 0x55, 0x1d, 0x0f, 0x04, 0x04, 0x03, 75 0x02, 0x05, 0xa0, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x25, 0x04, 0x16, 76 0x30, 0x14, 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07, 0x03, 0x01, 77 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07, 0x03, 0x02, 0x30, 0x57, 78 0x06, 0x03, 0x55, 0x1d, 0x1f, 0x04, 0x50, 0x30, 0x4e, 0x30, 0x4c, 0xa0, 79 0x4a, 0xa0, 0x48, 0x86, 0x46, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f, 0x2f, 80 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0x73, 0x30, 0x71, 0x30, 0x23, 0x06, 0x08, 0x2b, 94 0x06, 0x01, 0x05, 0x05, 0x07, 0x30, 0x01, 0x86, 0x17, 0x68, 0x74, 0x74, 95 0x70, 0x3a, 0x2f, 0x2f, 0x6f, 0x63, 0x73, 0x70, 0x2e, 0x67, 0x6f, 0x64, 96 0x61, 0x64, 0x64, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x30, 0x4a, 0x06, 0x08, 97 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07, 0x30, 0x02, 0x86, 0x3e, 0x68, 0x74, 98 0x74, 0x70, 0x3a, 0x2f, 0x2f, 0x63, 0x65, 0x72, 0x74, 0x69, 0x66, 0x69, 99 0x63, 0x61, 0x74, 0x65, 0x73, 0x2e, 0x67, 0x6f, 0x64, 0x61, 0x64, 0x64, 100 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x72, 0x65, 0x70, 0x6f, 0x73, 0x69, 101 0x74, 0x6f, 0x72, 0x79, 0x2f, 0x67, 0x64, 0x5f, 0x69, 0x6e, 0x74, 0x65, 102 0x72, 0x6d, 0x65, 0x64, 0x69, 0x61, 0x74, 0x65, 0x2e, 0x63, 0x72, 0x74, 103 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16, 0x04, 0x14, 0x48, 104 0xdf, 0x60, 0x32, 0xcc, 0x89, 0x01, 0xb6, 0xdc, 0x2f, 0xe3, 0x73, 0xb5, 105 0x9c, 0x16, 0x58, 0x32, 0x68, 0xa9, 0xc3, 0x30, 0x1f, 0x06, 0x03, 0x55, 106 0x1d, 0x23, 0x04, 0x18, 0x30, 0x16, 0x80, 0x14, 0xfd, 0xac, 0x61, 0x32, 107 0x93, 0x6c, 0x45, 0xd6, 0xe2, 0xee, 0x85, 0x5f, 0x9a, 0xba, 0xe7, 0x76, 108 0x99, 0x68, 0xcc, 0xe7, 0x30, 0x23, 0x06, 0x03, 0x55, 0x1d, 0x11, 0x04, 109 0x1c, 0x30, 0x1a, 0x82, 0x0c, 0x2a, 0x2e, 0x77, 0x65, 0x62, 0x6b, 0x69, 110 0x74, 0x2e, 0x6f, 0x72, 0x67, 0x82, 0x0a, 0x77, 0x65, 0x62, 0x6b, 0x69, 111 0x74, 0x2e, 0x6f, 0x72, 0x67 112 }; 113 114 // The signature algorithm is specified as the following ASN.1 structure: 115 // AlgorithmIdentifier ::= SEQUENCE { 116 // algorithm OBJECT IDENTIFIER, 117 // parameters ANY DEFINED BY algorithm OPTIONAL } 118 // 119 const uint8 signature_algorithm[15] = { 120 0x30, 0x0d, // a SEQUENCE of length 13 (0xd) 121 0x06, 0x09, // an OBJECT IDENTIFIER of length 9 122 // 1.2.840.113549.1.1.5 - sha1WithRSAEncryption 123 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05, 124 0x05, 0x00, // a NULL of length 0 125 }; 126 127 // RSA signature, a big integer in the big-endian byte order. 128 const uint8 signature[256] = { 129 0x1e, 0x6a, 0xe7, 0xe0, 0x4f, 0xe7, 0x4d, 0xd0, 0x69, 0x7c, 0xf8, 0x8f, 130 0x99, 0xb4, 0x18, 0x95, 0x36, 0x24, 0x0f, 0x0e, 0xa3, 0xea, 0x34, 0x37, 131 0xf4, 0x7d, 0xd5, 0x92, 0x35, 0x53, 0x72, 0x76, 0x3f, 0x69, 0xf0, 0x82, 132 0x56, 0xe3, 0x94, 0x7a, 0x1d, 0x1a, 0x81, 0xaf, 0x9f, 0xc7, 0x43, 0x01, 133 0x64, 0xd3, 0x7c, 0x0d, 0xc8, 0x11, 0x4e, 0x4a, 0xe6, 0x1a, 0xc3, 0x01, 134 0x74, 0xe8, 0x35, 0x87, 0x5c, 0x61, 0xaa, 0x8a, 0x46, 0x06, 0xbe, 0x98, 135 0x95, 0x24, 0x9e, 0x01, 0xe3, 0xe6, 0xa0, 0x98, 0xee, 0x36, 0x44, 0x56, 136 0x8d, 0x23, 0x9c, 0x65, 0xea, 0x55, 0x6a, 0xdf, 0x66, 0xee, 0x45, 0xe8, 137 0xa0, 0xe9, 0x7d, 0x9a, 0xba, 0x94, 0xc5, 0xc8, 0xc4, 0x4b, 0x98, 0xff, 138 0x9a, 0x01, 0x31, 0x6d, 0xf9, 0x2b, 0x58, 0xe7, 0xe7, 0x2a, 0xc5, 0x4d, 139 0xbb, 0xbb, 0xcd, 0x0d, 0x70, 0xe1, 0xad, 0x03, 0xf5, 0xfe, 0xf4, 0x84, 140 0x71, 0x08, 0xd2, 0xbc, 0x04, 0x7b, 0x26, 0x1c, 0xa8, 0x0f, 0x9c, 0xd8, 141 0x12, 0x6a, 0x6f, 0x2b, 0x67, 0xa1, 0x03, 0x80, 0x9a, 0x11, 0x0b, 0xe9, 142 0xe0, 0xb5, 0xb3, 0xb8, 0x19, 0x4e, 0x0c, 0xa4, 0xd9, 0x2b, 0x3b, 0xc2, 143 0xca, 0x20, 0xd3, 0x0c, 0xa4, 0xff, 0x93, 0x13, 0x1f, 0xfc, 0xba, 0x94, 144 0x93, 0x8c, 0x64, 0x15, 0x2e, 0x28, 0xa9, 0x55, 0x8c, 0x2c, 0x48, 0xd3, 145 0xd3, 0xc1, 0x50, 0x69, 0x19, 0xe8, 0x34, 0xd3, 0xf1, 0x04, 0x9f, 0x0a, 146 0x7a, 0x21, 0x87, 0xbf, 0xb9, 0x59, 0x37, 0x2e, 0xf4, 0x71, 0xa5, 0x3e, 147 0xbe, 0xcd, 0x70, 0x83, 0x18, 0xf8, 0x8a, 0x72, 0x85, 0x45, 0x1f, 0x08, 148 0x01, 0x6f, 0x37, 0xf5, 0x2b, 0x7b, 0xea, 0xb9, 0x8b, 0xa3, 0xcc, 0xfd, 149 0x35, 0x52, 0xdd, 0x66, 0xde, 0x4f, 0x30, 0xc5, 0x73, 0x81, 0xb6, 0xe8, 150 0x3c, 0xd8, 0x48, 0x8a 151 }; 152 153 // The public key is specified as the following ASN.1 structure: 154 // SubjectPublicKeyInfo ::= SEQUENCE { 155 // algorithm AlgorithmIdentifier, 156 // subjectPublicKey BIT STRING } 157 const uint8 public_key_info[294] = { 158 0x30, 0x82, 0x01, 0x22, // a SEQUENCE of length 290 (0x122) 159 // algorithm 160 0x30, 0x0d, // a SEQUENCE of length 13 161 0x06, 0x09, // an OBJECT IDENTIFIER of length 9 162 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01, 163 0x05, 0x00, // a NULL of length 0 164 // subjectPublicKey 165 0x03, 0x82, 0x01, 0x0f, // a BIT STRING of length 271 (0x10f) 166 0x00, // number of unused bits 167 0x30, 0x82, 0x01, 0x0a, // a SEQUENCE of length 266 (0x10a) 168 // modulus 169 0x02, 0x82, 0x01, 0x01, // an INTEGER of length 257 (0x101) 170 0x00, 0xc4, 0x2d, 0xd5, 0x15, 0x8c, 0x9c, 0x26, 0x4c, 0xec, 171 0x32, 0x35, 0xeb, 0x5f, 0xb8, 0x59, 0x01, 0x5a, 0xa6, 0x61, 172 0x81, 0x59, 0x3b, 0x70, 0x63, 0xab, 0xe3, 0xdc, 0x3d, 0xc7, 173 0x2a, 0xb8, 0xc9, 0x33, 0xd3, 0x79, 0xe4, 0x3a, 0xed, 0x3c, 174 0x30, 0x23, 0x84, 0x8e, 0xb3, 0x30, 0x14, 0xb6, 0xb2, 0x87, 175 0xc3, 0x3d, 0x95, 0x54, 0x04, 0x9e, 0xdf, 0x99, 0xdd, 0x0b, 176 0x25, 0x1e, 0x21, 0xde, 0x65, 0x29, 0x7e, 0x35, 0xa8, 0xa9, 177 0x54, 0xeb, 0xf6, 0xf7, 0x32, 0x39, 0xd4, 0x26, 0x55, 0x95, 178 0xad, 0xef, 0xfb, 0xfe, 0x58, 0x86, 0xd7, 0x9e, 0xf4, 0x00, 179 0x8d, 0x8c, 0x2a, 0x0c, 0xbd, 0x42, 0x04, 0xce, 0xa7, 0x3f, 180 0x04, 0xf6, 0xee, 0x80, 0xf2, 0xaa, 0xef, 0x52, 0xa1, 0x69, 181 0x66, 0xda, 0xbe, 0x1a, 0xad, 0x5d, 0xda, 0x2c, 0x66, 0xea, 182 0x1a, 0x6b, 0xbb, 0xe5, 0x1a, 0x51, 0x4a, 0x00, 0x2f, 0x48, 183 0xc7, 0x98, 0x75, 0xd8, 0xb9, 0x29, 0xc8, 0xee, 0xf8, 0x66, 184 0x6d, 0x0a, 0x9c, 0xb3, 0xf3, 0xfc, 0x78, 0x7c, 0xa2, 0xf8, 185 0xa3, 0xf2, 0xb5, 0xc3, 0xf3, 0xb9, 0x7a, 0x91, 0xc1, 0xa7, 186 0xe6, 0x25, 0x2e, 0x9c, 0xa8, 0xed, 0x12, 0x65, 0x6e, 0x6a, 187 0xf6, 0x12, 0x44, 0x53, 0x70, 0x30, 0x95, 0xc3, 0x9c, 0x2b, 188 0x58, 0x2b, 0x3d, 0x08, 0x74, 0x4a, 0xf2, 0xbe, 0x51, 0xb0, 189 0xbf, 0x87, 0xd0, 0x4c, 0x27, 0x58, 0x6b, 0xb5, 0x35, 0xc5, 190 0x9d, 0xaf, 0x17, 0x31, 0xf8, 0x0b, 0x8f, 0xee, 0xad, 0x81, 191 0x36, 0x05, 0x89, 0x08, 0x98, 0xcf, 0x3a, 0xaf, 0x25, 0x87, 192 0xc0, 0x49, 0xea, 0xa7, 0xfd, 0x67, 0xf7, 0x45, 0x8e, 0x97, 193 0xcc, 0x14, 0x39, 0xe2, 0x36, 0x85, 0xb5, 0x7e, 0x1a, 0x37, 194 0xfd, 0x16, 0xf6, 0x71, 0x11, 0x9a, 0x74, 0x30, 0x16, 0xfe, 195 0x13, 0x94, 0xa3, 0x3f, 0x84, 0x0d, 0x4f, 196 // public exponent 197 0x02, 0x03, // an INTEGER of length 3 198 0x01, 0x00, 0x01 199 }; 200 201 // We use the signature verifier to perform four signature verification 202 // tests. 203 crypto::SignatureVerifier verifier; 204 bool ok; 205 206 // Test 1: feed all of the data to the verifier at once (a single 207 // VerifyUpdate call). 208 ok = verifier.VerifyInit(signature_algorithm, 209 sizeof(signature_algorithm), 210 signature, sizeof(signature), 211 public_key_info, sizeof(public_key_info)); 212 EXPECT_TRUE(ok); 213 verifier.VerifyUpdate(tbs_certificate, sizeof(tbs_certificate)); 214 ok = verifier.VerifyFinal(); 215 EXPECT_TRUE(ok); 216 217 // Test 2: feed the data to the verifier in three parts (three VerifyUpdate 218 // calls). 219 ok = verifier.VerifyInit(signature_algorithm, 220 sizeof(signature_algorithm), 221 signature, sizeof(signature), 222 public_key_info, sizeof(public_key_info)); 223 EXPECT_TRUE(ok); 224 verifier.VerifyUpdate(tbs_certificate, 256); 225 verifier.VerifyUpdate(tbs_certificate + 256, 256); 226 verifier.VerifyUpdate(tbs_certificate + 512, sizeof(tbs_certificate) - 512); 227 ok = verifier.VerifyFinal(); 228 EXPECT_TRUE(ok); 229 230 // Test 3: verify the signature with incorrect data. 231 uint8 bad_tbs_certificate[sizeof(tbs_certificate)]; 232 memcpy(bad_tbs_certificate, tbs_certificate, sizeof(tbs_certificate)); 233 bad_tbs_certificate[10] += 1; // Corrupt one byte of the data. 234 ok = verifier.VerifyInit(signature_algorithm, 235 sizeof(signature_algorithm), 236 signature, sizeof(signature), 237 public_key_info, sizeof(public_key_info)); 238 EXPECT_TRUE(ok); 239 verifier.VerifyUpdate(bad_tbs_certificate, sizeof(bad_tbs_certificate)); 240 ok = verifier.VerifyFinal(); 241 242 // Purify disables digital signature verification, causing the Windows 243 // CryptoAPI function CryptVerifySignature to always succeed. So we can't 244 // check the signature verification results of the negative tests when 245 // running inside Purify. See http://crbug.com/10031. 246 #ifndef PURIFY 247 EXPECT_FALSE(ok); 248 #endif 249 250 // Test 4: verify a bad signature. 251 uint8 bad_signature[sizeof(signature)]; 252 memcpy(bad_signature, signature, sizeof(signature)); 253 bad_signature[10] += 1; // Corrupt one byte of the signature. 254 ok = verifier.VerifyInit(signature_algorithm, 255 sizeof(signature_algorithm), 256 bad_signature, sizeof(bad_signature), 257 public_key_info, sizeof(public_key_info)); 258 259 // A crypto library (e.g., NSS) may detect that the signature is corrupted 260 // and cause VerifyInit to return false, so it is fine for 'ok' to be false. 261 if (ok) { 262 verifier.VerifyUpdate(tbs_certificate, sizeof(tbs_certificate)); 263 ok = verifier.VerifyFinal(); 264 #ifndef PURIFY 265 EXPECT_FALSE(ok); 266 #endif 267 } 268 } 269
