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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/openssl_identity.h"
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <cstddef>
#include <cstdint>
#include <ctime>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "absl/memory/memory.h"
#include "absl/strings/string_view.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
#include "rtc_base/numerics/safe_conversions.h"
#include "rtc_base/openssl.h"
#include "rtc_base/openssl_certificate.h"
#include "rtc_base/openssl_key_pair.h"
#include "rtc_base/openssl_utility.h"
#include "rtc_base/ssl_certificate.h"
#include "rtc_base/ssl_identity.h"
namespace webrtc {
OpenSSLIdentity::OpenSSLIdentity(
std::unique_ptr<OpenSSLKeyPair> key_pair,
std::unique_ptr<OpenSSLCertificate> certificate)
: key_pair_(std::move(key_pair)) {
RTC_DCHECK(key_pair_ != nullptr);
RTC_DCHECK(certificate != nullptr);
std::vector<std::unique_ptr<SSLCertificate>> certs;
certs.push_back(std::move(certificate));
cert_chain_.reset(new SSLCertChain(std::move(certs)));
}
OpenSSLIdentity::OpenSSLIdentity(std::unique_ptr<OpenSSLKeyPair> key_pair,
std::unique_ptr<SSLCertChain> cert_chain)
: key_pair_(std::move(key_pair)), cert_chain_(std::move(cert_chain)) {
RTC_DCHECK(key_pair_ != nullptr);
RTC_DCHECK(cert_chain_ != nullptr);
}
OpenSSLIdentity::~OpenSSLIdentity() = default;
std::unique_ptr<OpenSSLIdentity> OpenSSLIdentity::CreateInternal(
const SSLIdentityParams& params) {
auto key_pair = OpenSSLKeyPair::Generate(params.key_params);
if (key_pair) {
std::unique_ptr<OpenSSLCertificate> certificate(
OpenSSLCertificate::Generate(key_pair.get(), params));
if (certificate != nullptr) {
return absl::WrapUnique(
new OpenSSLIdentity(std::move(key_pair), std::move(certificate)));
}
}
RTC_LOG(LS_ERROR) << "Identity generation failed";
return nullptr;
}
// static
std::unique_ptr<OpenSSLIdentity> OpenSSLIdentity::CreateWithExpiration(
absl::string_view common_name,
const KeyParams& key_params,
time_t certificate_lifetime) {
SSLIdentityParams params;
params.key_params = key_params;
params.common_name = std::string(common_name);
time_t now = time(nullptr);
params.not_before = now + kCertificateWindowInSeconds;
params.not_after = now + certificate_lifetime;
if (params.not_before > params.not_after) {
RTC_LOG(LS_ERROR)
<< "Іdentity generated failed, not_before is after not_after.";
return nullptr;
}
return CreateInternal(params);
}
std::unique_ptr<OpenSSLIdentity> OpenSSLIdentity::CreateForTest(
const SSLIdentityParams& params) {
return CreateInternal(params);
}
std::unique_ptr<SSLIdentity> OpenSSLIdentity::CreateFromPEMStrings(
absl::string_view private_key,
absl::string_view certificate) {
std::unique_ptr<OpenSSLCertificate> cert(
OpenSSLCertificate::FromPEMString(certificate));
if (!cert) {
RTC_LOG(LS_ERROR) << "Failed to create OpenSSLCertificate from PEM string.";
return nullptr;
}
auto key_pair = OpenSSLKeyPair::FromPrivateKeyPEMString(private_key);
if (!key_pair) {
RTC_LOG(LS_ERROR) << "Failed to create key pair from PEM string.";
return nullptr;
}
return absl::WrapUnique(
new OpenSSLIdentity(std::move(key_pair), std::move(cert)));
}
std::unique_ptr<SSLIdentity> OpenSSLIdentity::CreateFromPEMChainStrings(
absl::string_view private_key,
absl::string_view certificate_chain) {
BIO* bio = BIO_new_mem_buf(certificate_chain.data(),
dchecked_cast<int>(certificate_chain.size()));
if (!bio)
return nullptr;
BIO_set_mem_eof_return(bio, 0);
std::vector<std::unique_ptr<SSLCertificate>> certs;
while (true) {
X509* x509 =
PEM_read_bio_X509(bio, nullptr, nullptr, const_cast<char*>("\0"));
if (x509 == nullptr) {
uint32_t err = ERR_peek_error();
if (ERR_GET_LIB(err) == ERR_LIB_PEM &&
ERR_GET_REASON(err) == PEM_R_NO_START_LINE) {
err = ERR_get_error();
break;
}
RTC_LOG(LS_ERROR) << "Failed to parse certificate from PEM string: "
<< ERR_reason_error_string(err);
BIO_free(bio);
return nullptr;
}
certs.emplace_back(new OpenSSLCertificate(x509));
X509_free(x509);
}
BIO_free(bio);
if (certs.empty()) {
RTC_LOG(LS_ERROR) << "Found no certificates in PEM string.";
return nullptr;
}
auto key_pair = OpenSSLKeyPair::FromPrivateKeyPEMString(private_key);
if (!key_pair) {
RTC_LOG(LS_ERROR) << "Failed to create key pair from PEM string.";
return nullptr;
}
return absl::WrapUnique(new OpenSSLIdentity(
std::move(key_pair), std::make_unique<SSLCertChain>(std::move(certs))));
}
const OpenSSLCertificate& OpenSSLIdentity::certificate() const {
return *static_cast<const OpenSSLCertificate*>(&cert_chain_->Get(0));
}
const SSLCertChain& OpenSSLIdentity::cert_chain() const {
return *cert_chain_.get();
}
std::unique_ptr<SSLIdentity> OpenSSLIdentity::CloneInternal() const {
// We cannot use std::make_unique here because the referenced OpenSSLIdentity
// constructor is private.
return absl::WrapUnique(
new OpenSSLIdentity(key_pair_->Clone(), cert_chain_->Clone()));
}
bool OpenSSLIdentity::ConfigureIdentity(SSL_CTX* ctx) {
// 1 is the documented success return code.
const OpenSSLCertificate* cert = &certificate();
if (SSL_CTX_use_certificate(ctx, cert->x509()) != 1 ||
SSL_CTX_use_PrivateKey(ctx, key_pair_->pkey()) != 1) {
openssl::LogSSLErrors("Configuring key and certificate");
return false;
}
// If a chain is available, use it.
for (size_t i = 1; i < cert_chain_->GetSize(); ++i) {
cert = static_cast<const OpenSSLCertificate*>(&cert_chain_->Get(i));
if (SSL_CTX_add1_chain_cert(ctx, cert->x509()) != 1) {
openssl::LogSSLErrors("Configuring intermediate certificate");
return false;
}
}
return true;
}
std::string OpenSSLIdentity::PrivateKeyToPEMString() const {
return key_pair_->PrivateKeyToPEMString();
}
std::string OpenSSLIdentity::PublicKeyToPEMString() const {
return key_pair_->PublicKeyToPEMString();
}
bool OpenSSLIdentity::operator==(const OpenSSLIdentity& other) const {
return *this->key_pair_ == *other.key_pair_ &&
this->certificate() == other.certificate();
}
bool OpenSSLIdentity::operator!=(const OpenSSLIdentity& other) const {
return !(*this == other);
}
} // namespace webrtc
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