1 // Copyright 2017 The Chromium Authors
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_util_apple.h"
6
7 #include <CommonCrypto/CommonDigest.h>
8
9 #include <string>
10
11 #include "base/check_op.h"
12 #include "base/logging.h"
13 #include "base/notreached.h"
14 #include "base/numerics/safe_conversions.h"
15 #include "build/build_config.h"
16 #include "net/cert/x509_certificate.h"
17 #include "net/cert/x509_util.h"
18 #include "third_party/boringssl/src/include/openssl/pool.h"
19
20 namespace net {
21 namespace x509_util {
22
23 namespace {
24
CertBufferFromSecCertificate(SecCertificateRef sec_cert)25 bssl::UniquePtr<CRYPTO_BUFFER> CertBufferFromSecCertificate(
26 SecCertificateRef sec_cert) {
27 if (!sec_cert) {
28 return nullptr;
29 }
30 base::apple::ScopedCFTypeRef<CFDataRef> der_data(
31 SecCertificateCopyData(sec_cert));
32 if (!der_data) {
33 return nullptr;
34 }
35 return CreateCryptoBuffer(base::make_span(
36 CFDataGetBytePtr(der_data.get()),
37 base::checked_cast<size_t>(CFDataGetLength(der_data.get()))));
38 }
39
40 } // namespace
41
CreateSecCertificateFromBytes(base::span<const uint8_t> data)42 base::apple::ScopedCFTypeRef<SecCertificateRef> CreateSecCertificateFromBytes(
43 base::span<const uint8_t> data) {
44 base::apple::ScopedCFTypeRef<CFDataRef> cert_data(CFDataCreate(
45 kCFAllocatorDefault, reinterpret_cast<const UInt8*>(data.data()),
46 base::checked_cast<CFIndex>(data.size())));
47 if (!cert_data) {
48 return base::apple::ScopedCFTypeRef<SecCertificateRef>();
49 }
50
51 return base::apple::ScopedCFTypeRef<SecCertificateRef>(
52 SecCertificateCreateWithData(nullptr, cert_data.get()));
53 }
54
55 base::apple::ScopedCFTypeRef<SecCertificateRef>
CreateSecCertificateFromX509Certificate(const X509Certificate * cert)56 CreateSecCertificateFromX509Certificate(const X509Certificate* cert) {
57 return CreateSecCertificateFromBytes(CryptoBufferAsSpan(cert->cert_buffer()));
58 }
59
60 base::apple::ScopedCFTypeRef<CFMutableArrayRef>
CreateSecCertificateArrayForX509Certificate(X509Certificate * cert)61 CreateSecCertificateArrayForX509Certificate(X509Certificate* cert) {
62 return CreateSecCertificateArrayForX509Certificate(
63 cert, InvalidIntermediateBehavior::kFail);
64 }
65
66 base::apple::ScopedCFTypeRef<CFMutableArrayRef>
CreateSecCertificateArrayForX509Certificate(X509Certificate * cert,InvalidIntermediateBehavior invalid_intermediate_behavior)67 CreateSecCertificateArrayForX509Certificate(
68 X509Certificate* cert,
69 InvalidIntermediateBehavior invalid_intermediate_behavior) {
70 base::apple::ScopedCFTypeRef<CFMutableArrayRef> cert_list(
71 CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks));
72 if (!cert_list)
73 return base::apple::ScopedCFTypeRef<CFMutableArrayRef>();
74 std::string bytes;
75 base::apple::ScopedCFTypeRef<SecCertificateRef> sec_cert(
76 CreateSecCertificateFromBytes(CryptoBufferAsSpan(cert->cert_buffer())));
77 if (!sec_cert) {
78 return base::apple::ScopedCFTypeRef<CFMutableArrayRef>();
79 }
80 CFArrayAppendValue(cert_list.get(), sec_cert.get());
81 for (const auto& intermediate : cert->intermediate_buffers()) {
82 base::apple::ScopedCFTypeRef<SecCertificateRef> intermediate_cert(
83 CreateSecCertificateFromBytes(CryptoBufferAsSpan(intermediate.get())));
84 if (!intermediate_cert) {
85 if (invalid_intermediate_behavior == InvalidIntermediateBehavior::kFail)
86 return base::apple::ScopedCFTypeRef<CFMutableArrayRef>();
87 LOG(WARNING) << "error parsing intermediate";
88 continue;
89 }
90 CFArrayAppendValue(cert_list.get(), intermediate_cert.get());
91 }
92 return cert_list;
93 }
94
CreateX509CertificateFromSecCertificate(base::apple::ScopedCFTypeRef<SecCertificateRef> sec_cert,const std::vector<base::apple::ScopedCFTypeRef<SecCertificateRef>> & sec_chain)95 scoped_refptr<X509Certificate> CreateX509CertificateFromSecCertificate(
96 base::apple::ScopedCFTypeRef<SecCertificateRef> sec_cert,
97 const std::vector<base::apple::ScopedCFTypeRef<SecCertificateRef>>&
98 sec_chain) {
99 return CreateX509CertificateFromSecCertificate(sec_cert, sec_chain, {});
100 }
101
CreateX509CertificateFromSecCertificate(base::apple::ScopedCFTypeRef<SecCertificateRef> sec_cert,const std::vector<base::apple::ScopedCFTypeRef<SecCertificateRef>> & sec_chain,X509Certificate::UnsafeCreateOptions options)102 scoped_refptr<X509Certificate> CreateX509CertificateFromSecCertificate(
103 base::apple::ScopedCFTypeRef<SecCertificateRef> sec_cert,
104 const std::vector<base::apple::ScopedCFTypeRef<SecCertificateRef>>&
105 sec_chain,
106 X509Certificate::UnsafeCreateOptions options) {
107 bssl::UniquePtr<CRYPTO_BUFFER> cert_handle =
108 CertBufferFromSecCertificate(sec_cert.get());
109 if (!cert_handle) {
110 return nullptr;
111 }
112 std::vector<bssl::UniquePtr<CRYPTO_BUFFER>> intermediates;
113 for (const auto& sec_intermediate : sec_chain) {
114 bssl::UniquePtr<CRYPTO_BUFFER> intermediate_cert_handle =
115 CertBufferFromSecCertificate(sec_intermediate.get());
116 if (!intermediate_cert_handle) {
117 return nullptr;
118 }
119 intermediates.push_back(std::move(intermediate_cert_handle));
120 }
121 scoped_refptr<X509Certificate> result(
122 X509Certificate::CreateFromBufferUnsafeOptions(
123 std::move(cert_handle), std::move(intermediates), options));
124 return result;
125 }
126
CalculateFingerprint256(SecCertificateRef cert)127 SHA256HashValue CalculateFingerprint256(SecCertificateRef cert) {
128 SHA256HashValue sha256;
129 memset(sha256.data, 0, sizeof(sha256.data));
130
131 base::apple::ScopedCFTypeRef<CFDataRef> cert_data(
132 SecCertificateCopyData(cert));
133 if (!cert_data) {
134 return sha256;
135 }
136
137 DCHECK(CFDataGetBytePtr(cert_data.get()));
138 DCHECK_NE(CFDataGetLength(cert_data.get()), 0);
139
140 CC_SHA256(CFDataGetBytePtr(cert_data.get()), CFDataGetLength(cert_data.get()),
141 sha256.data);
142
143 return sha256;
144 }
145
CertificateChainFromSecTrust(SecTrustRef trust)146 base::apple::ScopedCFTypeRef<CFArrayRef> CertificateChainFromSecTrust(
147 SecTrustRef trust) {
148 if (__builtin_available(macOS 12.0, iOS 15.0, *)) {
149 return base::apple::ScopedCFTypeRef<CFArrayRef>(
150 SecTrustCopyCertificateChain(trust));
151 }
152
153 // TODO(crbug.com/1426476): Remove code when it is no longer needed.
154 #if (BUILDFLAG(IS_MAC) && \
155 MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_VERSION_12_0) || \
156 (BUILDFLAG(IS_IOS) && __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_15_0)
157 base::apple::ScopedCFTypeRef<CFMutableArrayRef> chain(
158 CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks));
159 const CFIndex chain_length = SecTrustGetCertificateCount(trust);
160 for (CFIndex i = 0; i < chain_length; ++i) {
161 CFArrayAppendValue(chain.get(), SecTrustGetCertificateAtIndex(trust, i));
162 }
163 return chain;
164
165 #else
166 // The other logic paths should be used, this is just to make the compiler
167 // happy.
168 NOTREACHED();
169 return base::apple::ScopedCFTypeRef<CFArrayRef>(nullptr);
170 #endif // (BUILDFLAG(IS_MAC) && MAC_OS_X_VERSION_MIN_REQUIRED <
171 // MAC_OS_VERSION_12_0)
172 // || (BUILDFLAG(IS_IOS) && __IPHONE_OS_VERSION_MIN_REQUIRED <
173 // __IPHONE_15_0)
174 }
175
176 } // namespace x509_util
177 } // namespace net
178