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| 1 // Copyright (c) 2012 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 "net/cert/x509_certificate.h" | |
| 6 | |
| 7 #include <CommonCrypto/CommonDigest.h> | |
| 8 #include <Security/Security.h> | |
| 9 | |
| 10 #include <cert.h> | |
| 11 #include <cryptohi.h> | |
| 12 #include <keyhi.h> | |
| 13 #include <nss.h> | |
| 14 #include <pk11pub.h> | |
| 15 #include <prerror.h> | |
| 16 #include <prtime.h> | |
| 17 #include <prtypes.h> | |
| 18 #include <secder.h> | |
| 19 #include <secerr.h> | |
| 20 #include <sslerr.h> | |
| 21 | |
| 22 #include <vector> | |
| 23 | |
| 24 #include "base/logging.h" | |
| 25 #include "base/mac/scoped_cftyperef.h" | |
| 26 #include "base/memory/scoped_ptr.h" | |
| 27 #include "base/pickle.h" | |
| 28 #include "base/time/time.h" | |
| 29 #include "crypto/nss_util.h" | |
| 30 #include "crypto/scoped_nss_types.h" | |
| 31 #include "net/base/net_errors.h" | |
| 32 #include "net/cert/asn1_util.h" | |
| 33 #include "net/cert/cert_status_flags.h" | |
| 34 #include "net/cert/cert_verify_result.h" | |
| 35 #include "net/cert/ev_root_ca_metadata.h" | |
| 36 #include "net/cert/x509_util_ios.h" | |
| 37 #include "net/cert/x509_util_nss.h" | |
| 38 | |
| 39 using base::ScopedCFTypeRef; | |
| 40 | |
| 41 namespace net { | |
| 42 namespace { | |
| 43 // Returns true if a given |cert_handle| is actually a valid X.509 certificate | |
| 44 // handle. | |
| 45 // | |
| 46 // SecCertificateCreateFromData() does not always force the immediate parsing of | |
| 47 // the certificate, and as such, may return a SecCertificateRef for an | |
| 48 // invalid/unparsable certificate. Force parsing to occur to ensure that the | |
| 49 // SecCertificateRef is correct. On later versions where | |
| 50 // SecCertificateCreateFromData() immediately parses, rather than lazily, this | |
| 51 // call is cheap, as the subject is cached. | |
| 52 bool IsValidOSCertHandle(SecCertificateRef cert_handle) { | |
| 53 ScopedCFTypeRef<CFStringRef> sanity_check( | |
| 54 SecCertificateCopySubjectSummary(cert_handle)); | |
| 55 return sanity_check != NULL; | |
| 56 } | |
| 57 } // namespace | |
| 58 | |
| 59 void X509Certificate::Initialize() { | |
| 60 x509_util_ios::NSSCertificate nss_cert(cert_handle_); | |
| 61 CERTCertificate* cert_handle = nss_cert.cert_handle(); | |
| 62 if (cert_handle) { | |
| 63 x509_util::ParsePrincipal(&cert_handle->subject, &subject_); | |
| 64 x509_util::ParsePrincipal(&cert_handle->issuer, &issuer_); | |
| 65 x509_util::ParseDate(&cert_handle->validity.notBefore, &valid_start_); | |
| 66 x509_util::ParseDate(&cert_handle->validity.notAfter, &valid_expiry_); | |
| 67 serial_number_ = x509_util::ParseSerialNumber(cert_handle); | |
| 68 } | |
| 69 fingerprint_ = CalculateFingerprint(cert_handle_); | |
| 70 ca_fingerprint_ = CalculateCAFingerprint(intermediate_ca_certs_); | |
| 71 } | |
| 72 | |
| 73 bool X509Certificate::IsIssuedByEncoded( | |
| 74 const std::vector<std::string>& valid_issuers) { | |
| 75 x509_util_ios::NSSCertChain nss_chain(this); | |
| 76 // Convert to scoped CERTName* list. | |
| 77 std::vector<CERTName*> issuers; | |
| 78 crypto::ScopedPLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE)); | |
| 79 if (!x509_util::GetIssuersFromEncodedList(valid_issuers, | |
| 80 arena.get(), | |
| 81 &issuers)) { | |
| 82 return false; | |
| 83 } | |
| 84 return x509_util::IsCertificateIssuedBy( | |
| 85 nss_chain.cert_chain(), issuers); | |
| 86 } | |
| 87 | |
| 88 void X509Certificate::GetSubjectAltName( | |
| 89 std::vector<std::string>* dns_names, | |
| 90 std::vector<std::string>* ip_addrs) const { | |
| 91 x509_util_ios::NSSCertificate nss_cert(cert_handle_); | |
| 92 CERTCertificate* cert_handle = nss_cert.cert_handle(); | |
| 93 if (!cert_handle) { | |
| 94 if (dns_names) | |
| 95 dns_names->clear(); | |
| 96 if (ip_addrs) | |
| 97 ip_addrs->clear(); | |
| 98 return; | |
| 99 } | |
| 100 x509_util::GetSubjectAltName(cert_handle, dns_names, ip_addrs); | |
| 101 } | |
| 102 | |
| 103 // static | |
| 104 bool X509Certificate::GetDEREncoded(OSCertHandle cert_handle, | |
| 105 std::string* encoded) { | |
| 106 if (!cert_handle) | |
| 107 return false; | |
| 108 ScopedCFTypeRef<CFDataRef> der_data(SecCertificateCopyData(cert_handle)); | |
| 109 if (!der_data) | |
| 110 return false; | |
| 111 encoded->assign(reinterpret_cast<const char*>(CFDataGetBytePtr(der_data)), | |
| 112 CFDataGetLength(der_data)); | |
| 113 return true; | |
| 114 } | |
| 115 | |
| 116 // static | |
| 117 bool X509Certificate::IsSameOSCert(X509Certificate::OSCertHandle a, | |
| 118 X509Certificate::OSCertHandle b) { | |
| 119 DCHECK(a && b); | |
| 120 if (a == b) | |
| 121 return true; | |
| 122 if (CFEqual(a, b)) | |
| 123 return true; | |
| 124 ScopedCFTypeRef<CFDataRef> a_data(SecCertificateCopyData(a)); | |
| 125 ScopedCFTypeRef<CFDataRef> b_data(SecCertificateCopyData(b)); | |
| 126 return a_data && b_data && | |
| 127 CFDataGetLength(a_data) == CFDataGetLength(b_data) && | |
| 128 memcmp(CFDataGetBytePtr(a_data), CFDataGetBytePtr(b_data), | |
| 129 CFDataGetLength(a_data)) == 0; | |
| 130 } | |
| 131 | |
| 132 // static | |
| 133 X509Certificate::OSCertHandle X509Certificate::CreateOSCertHandleFromBytes( | |
| 134 const char* data, int length) { | |
| 135 ScopedCFTypeRef<CFDataRef> cert_data(CFDataCreateWithBytesNoCopy( | |
| 136 kCFAllocatorDefault, reinterpret_cast<const UInt8 *>(data), length, | |
| 137 kCFAllocatorNull)); | |
| 138 if (!cert_data) | |
| 139 return NULL; | |
| 140 OSCertHandle cert_handle = SecCertificateCreateWithData(NULL, cert_data); | |
| 141 if (!cert_handle) | |
| 142 return NULL; | |
| 143 if (!IsValidOSCertHandle(cert_handle)) { | |
| 144 CFRelease(cert_handle); | |
| 145 return NULL; | |
| 146 } | |
| 147 return cert_handle; | |
| 148 } | |
| 149 | |
| 150 // static | |
| 151 X509Certificate::OSCertHandles X509Certificate::CreateOSCertHandlesFromBytes( | |
| 152 const char* data, | |
| 153 int length, | |
| 154 Format format) { | |
| 155 return x509_util::CreateOSCertHandlesFromBytes(data, length, format); | |
| 156 } | |
| 157 | |
| 158 // static | |
| 159 X509Certificate::OSCertHandle X509Certificate::DupOSCertHandle( | |
| 160 OSCertHandle handle) { | |
| 161 if (!handle) | |
| 162 return NULL; | |
| 163 return reinterpret_cast<OSCertHandle>(const_cast<void*>(CFRetain(handle))); | |
| 164 } | |
| 165 | |
| 166 // static | |
| 167 void X509Certificate::FreeOSCertHandle(OSCertHandle cert_handle) { | |
| 168 if (cert_handle) | |
| 169 CFRelease(cert_handle); | |
| 170 } | |
| 171 | |
| 172 // static | |
| 173 SHA1HashValue X509Certificate::CalculateFingerprint( | |
| 174 OSCertHandle cert) { | |
| 175 SHA1HashValue sha1; | |
| 176 memset(sha1.data, 0, sizeof(sha1.data)); | |
| 177 | |
| 178 ScopedCFTypeRef<CFDataRef> cert_data(SecCertificateCopyData(cert)); | |
| 179 if (!cert_data) | |
| 180 return sha1; | |
| 181 DCHECK(CFDataGetBytePtr(cert_data)); | |
| 182 DCHECK_NE(0, CFDataGetLength(cert_data)); | |
| 183 CC_SHA1(CFDataGetBytePtr(cert_data), CFDataGetLength(cert_data), sha1.data); | |
| 184 | |
| 185 return sha1; | |
| 186 } | |
| 187 | |
| 188 // static | |
| 189 SHA256HashValue X509Certificate::CalculateFingerprint256(OSCertHandle cert) { | |
| 190 SHA256HashValue sha256; | |
| 191 memset(sha256.data, 0, sizeof(sha256.data)); | |
| 192 | |
| 193 ScopedCFTypeRef<CFDataRef> cert_data(SecCertificateCopyData(cert)); | |
| 194 if (!cert_data) | |
| 195 return sha256; | |
| 196 DCHECK(CFDataGetBytePtr(cert_data)); | |
| 197 DCHECK_NE(0, CFDataGetLength(cert_data)); | |
| 198 CC_SHA256( | |
| 199 CFDataGetBytePtr(cert_data), CFDataGetLength(cert_data), sha256.data); | |
| 200 | |
| 201 return sha256; | |
| 202 } | |
| 203 | |
| 204 // static | |
| 205 SHA1HashValue X509Certificate::CalculateCAFingerprint( | |
| 206 const OSCertHandles& intermediates) { | |
| 207 SHA1HashValue sha1; | |
| 208 memset(sha1.data, 0, sizeof(sha1.data)); | |
| 209 | |
| 210 // The CC_SHA(3cc) man page says all CC_SHA1_xxx routines return 1, so | |
| 211 // we don't check their return values. | |
| 212 CC_SHA1_CTX sha1_ctx; | |
| 213 CC_SHA1_Init(&sha1_ctx); | |
| 214 for (size_t i = 0; i < intermediates.size(); ++i) { | |
| 215 ScopedCFTypeRef<CFDataRef> | |
| 216 cert_data(SecCertificateCopyData(intermediates[i])); | |
| 217 if (!cert_data) | |
| 218 return sha1; | |
| 219 CC_SHA1_Update(&sha1_ctx, | |
| 220 CFDataGetBytePtr(cert_data), | |
| 221 CFDataGetLength(cert_data)); | |
| 222 } | |
| 223 CC_SHA1_Final(sha1.data, &sha1_ctx); | |
| 224 return sha1; | |
| 225 } | |
| 226 | |
| 227 // static | |
| 228 X509Certificate::OSCertHandle | |
| 229 X509Certificate::ReadOSCertHandleFromPickle(PickleIterator* pickle_iter) { | |
| 230 return x509_util::ReadOSCertHandleFromPickle(pickle_iter); | |
| 231 } | |
| 232 | |
| 233 // static | |
| 234 bool X509Certificate::WriteOSCertHandleToPickle(OSCertHandle cert_handle, | |
| 235 Pickle* pickle) { | |
| 236 ScopedCFTypeRef<CFDataRef> cert_data(SecCertificateCopyData(cert_handle)); | |
| 237 if (!cert_data) | |
| 238 return false; | |
| 239 | |
| 240 return pickle->WriteData( | |
| 241 reinterpret_cast<const char*>(CFDataGetBytePtr(cert_data)), | |
| 242 CFDataGetLength(cert_data)); | |
| 243 } | |
| 244 | |
| 245 // static | |
| 246 void X509Certificate::GetPublicKeyInfo(OSCertHandle cert_handle, | |
| 247 size_t* size_bits, | |
| 248 PublicKeyType* type) { | |
| 249 x509_util_ios::NSSCertificate nss_cert(cert_handle); | |
| 250 x509_util::GetPublicKeyInfo(nss_cert.cert_handle(), size_bits, type); | |
| 251 } | |
| 252 | |
| 253 // static | |
| 254 bool X509Certificate::IsSelfSigned(OSCertHandle cert_handle) { | |
| 255 x509_util_ios::NSSCertificate nss_cert(cert_handle); | |
| 256 crypto::ScopedSECKEYPublicKey public_key( | |
| 257 CERT_ExtractPublicKey(nss_cert.cert_handle())); | |
| 258 if (!public_key.get()) | |
| 259 return false; | |
| 260 return SECSuccess == CERT_VerifySignedDataWithPublicKey( | |
| 261 &nss_cert.cert_handle()->signatureWrap, public_key.get(), NULL); | |
| 262 } | |
| 263 | |
| 264 } // namespace net | |
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