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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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