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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/cert/x509_util_apple.h"
#include <CommonCrypto/CommonDigest.h>
#include <string>
#include "base/apple/foundation_util.h"
#include "base/check_op.h"
#include "base/logging.h"
#include "base/notreached.h"
#include "base/numerics/safe_conversions.h"
#include "build/build_config.h"
#include "crypto/hash.h"
#include "net/cert/x509_certificate.h"
#include "net/cert/x509_util.h"
#include "third_party/boringssl/src/include/openssl/pool.h"
namespace net {
namespace x509_util {
namespace {
bssl::UniquePtr<CRYPTO_BUFFER> CertBufferFromSecCertificate(
SecCertificateRef sec_cert) {
if (!sec_cert) {
return nullptr;
}
base::apple::ScopedCFTypeRef<CFDataRef> der_data(
SecCertificateCopyData(sec_cert));
if (!der_data) {
return nullptr;
}
return CreateCryptoBuffer(base::apple::CFDataToSpan(der_data.get()));
}
} // namespace
base::apple::ScopedCFTypeRef<SecCertificateRef> CreateSecCertificateFromBytes(
base::span<const uint8_t> data) {
base::apple::ScopedCFTypeRef<CFDataRef> cert_data(CFDataCreate(
kCFAllocatorDefault, reinterpret_cast<const UInt8*>(data.data()),
base::checked_cast<CFIndex>(data.size())));
if (!cert_data) {
return base::apple::ScopedCFTypeRef<SecCertificateRef>();
}
return base::apple::ScopedCFTypeRef<SecCertificateRef>(
SecCertificateCreateWithData(nullptr, cert_data.get()));
}
base::apple::ScopedCFTypeRef<SecCertificateRef>
CreateSecCertificateFromX509Certificate(const X509Certificate* cert) {
return CreateSecCertificateFromBytes(CryptoBufferAsSpan(cert->cert_buffer()));
}
base::apple::ScopedCFTypeRef<CFMutableArrayRef>
CreateSecCertificateArrayForX509Certificate(X509Certificate* cert) {
return CreateSecCertificateArrayForX509Certificate(
cert, InvalidIntermediateBehavior::kFail);
}
base::apple::ScopedCFTypeRef<CFMutableArrayRef>
CreateSecCertificateArrayForX509Certificate(
X509Certificate* cert,
InvalidIntermediateBehavior invalid_intermediate_behavior) {
base::apple::ScopedCFTypeRef<CFMutableArrayRef> cert_list(
CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks));
if (!cert_list)
return base::apple::ScopedCFTypeRef<CFMutableArrayRef>();
std::string bytes;
base::apple::ScopedCFTypeRef<SecCertificateRef> sec_cert(
CreateSecCertificateFromBytes(CryptoBufferAsSpan(cert->cert_buffer())));
if (!sec_cert) {
return base::apple::ScopedCFTypeRef<CFMutableArrayRef>();
}
CFArrayAppendValue(cert_list.get(), sec_cert.get());
for (const auto& intermediate : cert->intermediate_buffers()) {
base::apple::ScopedCFTypeRef<SecCertificateRef> intermediate_cert(
CreateSecCertificateFromBytes(CryptoBufferAsSpan(intermediate.get())));
if (!intermediate_cert) {
if (invalid_intermediate_behavior == InvalidIntermediateBehavior::kFail)
return base::apple::ScopedCFTypeRef<CFMutableArrayRef>();
LOG(WARNING) << "error parsing intermediate";
continue;
}
CFArrayAppendValue(cert_list.get(), intermediate_cert.get());
}
return cert_list;
}
scoped_refptr<X509Certificate> CreateX509CertificateFromSecCertificate(
base::apple::ScopedCFTypeRef<SecCertificateRef> sec_cert,
const std::vector<base::apple::ScopedCFTypeRef<SecCertificateRef>>&
sec_chain) {
return CreateX509CertificateFromSecCertificate(sec_cert, sec_chain, {});
}
scoped_refptr<X509Certificate> CreateX509CertificateFromSecCertificate(
base::apple::ScopedCFTypeRef<SecCertificateRef> sec_cert,
const std::vector<base::apple::ScopedCFTypeRef<SecCertificateRef>>&
sec_chain,
X509Certificate::UnsafeCreateOptions options) {
bssl::UniquePtr<CRYPTO_BUFFER> cert_handle =
CertBufferFromSecCertificate(sec_cert.get());
if (!cert_handle) {
return nullptr;
}
std::vector<bssl::UniquePtr<CRYPTO_BUFFER>> intermediates;
for (const auto& sec_intermediate : sec_chain) {
bssl::UniquePtr<CRYPTO_BUFFER> intermediate_cert_handle =
CertBufferFromSecCertificate(sec_intermediate.get());
if (!intermediate_cert_handle) {
return nullptr;
}
intermediates.push_back(std::move(intermediate_cert_handle));
}
scoped_refptr<X509Certificate> result(
X509Certificate::CreateFromBufferUnsafeOptions(
std::move(cert_handle), std::move(intermediates), options));
return result;
}
SHA256HashValue CalculateFingerprint256(SecCertificateRef cert) {
SHA256HashValue sha256 = {0};
base::apple::ScopedCFTypeRef<CFDataRef> cert_data(
SecCertificateCopyData(cert));
if (!cert_data) {
return sha256;
}
DCHECK(CFDataGetBytePtr(cert_data.get()));
DCHECK_NE(CFDataGetLength(cert_data.get()), 0);
return crypto::hash::Sha256(base::apple::CFDataToSpan(cert_data.get()));
}
} // namespace x509_util
} // namespace net
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