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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/ssl/ssl_platform_key.h"
#include <keyhi.h>
#include <pk11pub.h>
#include <prerror.h>
#include <openssl/rsa.h>
#include "base/logging.h"
#include "base/macros.h"
#include "base/sequenced_task_runner.h"
#include "crypto/scoped_nss_types.h"
#include "crypto/scoped_openssl_types.h"
#include "net/cert/x509_certificate.h"
#include "net/ssl/client_key_store.h"
#include "net/ssl/ssl_platform_key_task_runner.h"
#include "net/ssl/ssl_private_key.h"
#include "net/ssl/threaded_ssl_private_key.h"
namespace net {
namespace {
void LogPRError() {
PRErrorCode err = PR_GetError();
const char* err_name = PR_ErrorToName(err);
if (err_name == nullptr)
err_name = "";
LOG(ERROR) << "Could not sign digest: " << err << " (" << err_name << ")";
}
class SSLPlatformKeyChromecast : public ThreadedSSLPrivateKey::Delegate {
public:
SSLPlatformKeyChromecast(crypto::ScopedSECKEYPrivateKey key)
: key_(std::move(key)) {}
~SSLPlatformKeyChromecast() override {}
SSLPrivateKey::Type GetType() override { return SSLPrivateKey::Type::RSA; }
std::vector<SSLPrivateKey::Hash> GetDigestPreferences() override {
static const SSLPrivateKey::Hash kHashes[] = {
SSLPrivateKey::Hash::SHA256, SSLPrivateKey::Hash::SHA1,
SSLPrivateKey::Hash::MD5_SHA1};
return std::vector<SSLPrivateKey::Hash>(kHashes,
kHashes + arraysize(kHashes));
}
size_t GetMaxSignatureLengthInBytes() override {
int len = PK11_SignatureLen(key_.get());
if (len <= 0)
return 0;
return static_cast<size_t>(len);
}
Error SignDigest(SSLPrivateKey::Hash hash,
const base::StringPiece& input,
std::vector<uint8_t>* signature) override {
SECItem digest_item;
digest_item.data =
const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(input.data()));
digest_item.len = input.size();
crypto::ScopedOpenSSLBytes free_digest_info;
// PK11_Sign expects the caller to prepend the DigestInfo.
int hash_nid = NID_undef;
switch (hash) {
case SSLPrivateKey::Hash::MD5_SHA1:
hash_nid = NID_md5_sha1;
break;
case SSLPrivateKey::Hash::SHA1:
hash_nid = NID_sha1;
break;
case SSLPrivateKey::Hash::SHA256:
hash_nid = NID_sha256;
break;
default:
return ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED;
}
DCHECK_NE(NID_undef, hash_nid);
int is_alloced;
size_t prefix_len;
if (!RSA_add_pkcs1_prefix(&digest_item.data, &prefix_len, &is_alloced,
hash_nid, digest_item.data, digest_item.len)) {
return ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED;
}
digest_item.len = prefix_len;
if (is_alloced)
free_digest_info.reset(digest_item.data);
int len = PK11_SignatureLen(key_.get());
if (len <= 0) {
LogPRError();
return ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED;
}
signature->resize(len);
SECItem signature_item;
signature_item.data = signature->data();
signature_item.len = signature->size();
SECStatus rv = PK11_Sign(key_.get(), &signature_item, &digest_item);
if (rv != SECSuccess) {
LogPRError();
return ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED;
}
signature->resize(signature_item.len);
return OK;
}
private:
crypto::ScopedSECKEYPrivateKey key_;
DISALLOW_COPY_AND_ASSIGN(SSLPlatformKeyChromecast);
};
} // namespace
scoped_refptr<SSLPrivateKey> FetchClientCertPrivateKey(
X509Certificate* certificate) {
crypto::ScopedSECKEYPrivateKey key(
PK11_FindKeyByAnyCert(certificate->os_cert_handle(), nullptr));
if (!key) {
return ClientKeyStore::GetInstance()->FetchClientCertPrivateKey(
*certificate);
}
return make_scoped_refptr(new ThreadedSSLPrivateKey(
make_scoped_ptr(new SSLPlatformKeyChromecast(std::move(key))),
GetSSLPlatformKeyTaskRunner()));
}
} // namespace net
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