Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 412 insertions, 0 deletions

diff --git a/third_party/libwebrtc/rtc_base/boringssl_certificate.cc b/third_party/libwebrtc/rtc_base/boringssl_certificate.cc
new file mode 100644
index 0000000000..a866224496
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/boringssl_certificate.cc
@@ -0,0 +1,412 @@
+/*
+ *  Copyright 2020 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/boringssl_certificate.h"
+
+#include "absl/strings/string_view.h"
+
+#if defined(WEBRTC_WIN)
+// Must be included first before openssl headers.
+#include "rtc_base/win32.h"  // NOLINT
+#endif                       // WEBRTC_WIN
+
+#include <openssl/asn1.h>
+#include <openssl/bytestring.h>
+#include <openssl/digest.h>
+#include <openssl/evp.h>
+#include <openssl/mem.h>
+#include <openssl/pool.h>
+#include <openssl/rand.h>
+#include <time.h>
+
+#include <cstring>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "rtc_base/checks.h"
+#include "rtc_base/helpers.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/message_digest.h"
+#include "rtc_base/openssl_digest.h"
+#include "rtc_base/openssl_key_pair.h"
+#include "rtc_base/openssl_utility.h"
+
+namespace rtc {
+namespace {
+
+// List of OIDs of signature algorithms accepted by WebRTC.
+// Taken from openssl/nid.h.
+static const uint8_t kMD5WithRSA[] = {0x2b, 0x0e, 0x03, 0x02, 0x03};
+static const uint8_t kMD5WithRSAEncryption[] = {0x2a, 0x86, 0x48, 0x86, 0xf7,
+                                                0x0d, 0x01, 0x01, 0x04};
+static const uint8_t kECDSAWithSHA1[] = {0x2a, 0x86, 0x48, 0xce,
+                                         0x3d, 0x04, 0x01};
+static const uint8_t kDSAWithSHA1[] = {0x2a, 0x86, 0x48, 0xce,
+                                       0x38, 0x04, 0x03};
+static const uint8_t kDSAWithSHA1_2[] = {0x2b, 0x0e, 0x03, 0x02, 0x1b};
+static const uint8_t kSHA1WithRSA[] = {0x2b, 0x0e, 0x03, 0x02, 0x1d};
+static const uint8_t kSHA1WithRSAEncryption[] = {0x2a, 0x86, 0x48, 0x86, 0xf7,
+                                                 0x0d, 0x01, 0x01, 0x05};
+static const uint8_t kECDSAWithSHA224[] = {0x2a, 0x86, 0x48, 0xce,
+                                           0x3d, 0x04, 0x03, 0x01};
+static const uint8_t kSHA224WithRSAEncryption[] = {0x2a, 0x86, 0x48, 0x86, 0xf7,
+                                                   0x0d, 0x01, 0x01, 0x0e};
+static const uint8_t kDSAWithSHA224[] = {0x60, 0x86, 0x48, 0x01, 0x65,
+                                         0x03, 0x04, 0x03, 0x01};
+static const uint8_t kECDSAWithSHA256[] = {0x2a, 0x86, 0x48, 0xce,
+                                           0x3d, 0x04, 0x03, 0x02};
+static const uint8_t kSHA256WithRSAEncryption[] = {0x2a, 0x86, 0x48, 0x86, 0xf7,
+                                                   0x0d, 0x01, 0x01, 0x0b};
+static const uint8_t kDSAWithSHA256[] = {0x60, 0x86, 0x48, 0x01, 0x65,
+                                         0x03, 0x04, 0x03, 0x02};
+static const uint8_t kECDSAWithSHA384[] = {0x2a, 0x86, 0x48, 0xce,
+                                           0x3d, 0x04, 0x03, 0x03};
+static const uint8_t kSHA384WithRSAEncryption[] = {0x2a, 0x86, 0x48, 0x86, 0xf7,
+                                                   0x0d, 0x01, 0x01, 0x0c};
+static const uint8_t kECDSAWithSHA512[] = {0x2a, 0x86, 0x48, 0xce,
+                                           0x3d, 0x04, 0x03, 0x04};
+static const uint8_t kSHA512WithRSAEncryption[] = {0x2a, 0x86, 0x48, 0x86, 0xf7,
+                                                   0x0d, 0x01, 0x01, 0x0d};
+
+#if !defined(NDEBUG)
+// Print a certificate to the log, for debugging.
+static void PrintCert(BoringSSLCertificate* cert) {
+  // Since we're using CRYPTO_BUFFER, we can't use X509_print_ex, so we'll just
+  // print the PEM string.
+  RTC_DLOG(LS_VERBOSE) << "PEM representation of certificate:\n"
+                       << cert->ToPEMString();
+}
+#endif
+
+bool AddSHA256SignatureAlgorithm(CBB* cbb, KeyType key_type) {
+  // An AlgorithmIdentifier is described in RFC 5280, 4.1.1.2.
+  CBB sequence, oid, params;
+  if (!CBB_add_asn1(cbb, &sequence, CBS_ASN1_SEQUENCE) ||
+      !CBB_add_asn1(&sequence, &oid, CBS_ASN1_OBJECT)) {
+    return false;
+  }
+
+  switch (key_type) {
+    case KT_RSA:
+      if (!CBB_add_bytes(&oid, kSHA256WithRSAEncryption,
+                         sizeof(kSHA256WithRSAEncryption)) ||
+          !CBB_add_asn1(&sequence, &params, CBS_ASN1_NULL)) {
+        return false;
+      }
+      break;
+    case KT_ECDSA:
+      if (!CBB_add_bytes(&oid, kECDSAWithSHA256, sizeof(kECDSAWithSHA256))) {
+        return false;
+      }
+      break;
+    default:
+      RTC_DCHECK_NOTREACHED();
+      return false;
+  }
+  if (!CBB_flush(cbb)) {
+    return false;
+  }
+  return true;
+}
+
+// Adds an X.509 Common Name to `cbb`.
+bool AddCommonName(CBB* cbb, absl::string_view common_name) {
+  // See RFC 4519.
+  static const uint8_t kCommonName[] = {0x55, 0x04, 0x03};
+
+  if (common_name.empty()) {
+    RTC_LOG(LS_ERROR) << "Common name cannot be empty.";
+    return false;
+  }
+
+  // See RFC 5280, section 4.1.2.4.
+  CBB rdns;
+  if (!CBB_add_asn1(cbb, &rdns, CBS_ASN1_SEQUENCE)) {
+    return false;
+  }
+
+  CBB rdn, attr, type, value;
+  if (!CBB_add_asn1(&rdns, &rdn, CBS_ASN1_SET) ||
+      !CBB_add_asn1(&rdn, &attr, CBS_ASN1_SEQUENCE) ||
+      !CBB_add_asn1(&attr, &type, CBS_ASN1_OBJECT) ||
+      !CBB_add_bytes(&type, kCommonName, sizeof(kCommonName)) ||
+      !CBB_add_asn1(&attr, &value, CBS_ASN1_UTF8STRING) ||
+      !CBB_add_bytes(&value,
+                     reinterpret_cast<const uint8_t*>(common_name.data()),
+                     common_name.size()) ||
+      !CBB_flush(cbb)) {
+    return false;
+  }
+
+  return true;
+}
+
+bool AddTime(CBB* cbb, time_t time) {
+  bssl::UniquePtr<ASN1_TIME> asn1_time(ASN1_TIME_new());
+  if (!asn1_time) {
+    return false;
+  }
+
+  if (!ASN1_TIME_set(asn1_time.get(), time)) {
+    return false;
+  }
+
+  unsigned tag;
+  switch (asn1_time->type) {
+    case V_ASN1_UTCTIME:
+      tag = CBS_ASN1_UTCTIME;
+      break;
+    case V_ASN1_GENERALIZEDTIME:
+      tag = CBS_ASN1_GENERALIZEDTIME;
+      break;
+    default:
+      return false;
+  }
+
+  CBB child;
+  if (!CBB_add_asn1(cbb, &child, tag) ||
+      !CBB_add_bytes(&child, asn1_time->data, asn1_time->length) ||
+      !CBB_flush(cbb)) {
+    return false;
+  }
+
+  return true;
+}
+
+// Generate a self-signed certificate, with the public key from the
+// given key pair. Caller is responsible for freeing the returned object.
+static bssl::UniquePtr<CRYPTO_BUFFER> MakeCertificate(
+    EVP_PKEY* pkey,
+    const SSLIdentityParams& params) {
+  RTC_LOG(LS_INFO) << "Making certificate for " << params.common_name;
+
+  // See RFC 5280, section 4.1. First, construct the TBSCertificate.
+  bssl::ScopedCBB cbb;
+  CBB tbs_cert, version, validity;
+  uint8_t* tbs_cert_bytes;
+  size_t tbs_cert_len;
+  uint64_t serial_number;
+  if (!CBB_init(cbb.get(), 64) ||
+      !CBB_add_asn1(cbb.get(), &tbs_cert, CBS_ASN1_SEQUENCE) ||
+      !CBB_add_asn1(&tbs_cert, &version,
+                    CBS_ASN1_CONTEXT_SPECIFIC | CBS_ASN1_CONSTRUCTED | 0) ||
+      !CBB_add_asn1_uint64(&version, 2) ||
+      !RAND_bytes(reinterpret_cast<uint8_t*>(&serial_number),
+                  sizeof(serial_number)) ||
+      !CBB_add_asn1_uint64(&tbs_cert, serial_number) ||
+      !AddSHA256SignatureAlgorithm(&tbs_cert, params.key_params.type()) ||
+      !AddCommonName(&tbs_cert, params.common_name) ||  // issuer
+      !CBB_add_asn1(&tbs_cert, &validity, CBS_ASN1_SEQUENCE) ||
+      !AddTime(&validity, params.not_before) ||
+      !AddTime(&validity, params.not_after) ||
+      !AddCommonName(&tbs_cert, params.common_name) ||  // subject
+      !EVP_marshal_public_key(&tbs_cert, pkey) ||       // subjectPublicKeyInfo
+      !CBB_finish(cbb.get(), &tbs_cert_bytes, &tbs_cert_len)) {
+    return nullptr;
+  }
+
+  bssl::UniquePtr<uint8_t> delete_tbs_cert_bytes(tbs_cert_bytes);
+
+  // Sign the TBSCertificate and write the entire certificate.
+  CBB cert, signature;
+  bssl::ScopedEVP_MD_CTX ctx;
+  uint8_t* sig_out;
+  size_t sig_len;
+  uint8_t* cert_bytes;
+  size_t cert_len;
+  if (!CBB_init(cbb.get(), tbs_cert_len) ||
+      !CBB_add_asn1(cbb.get(), &cert, CBS_ASN1_SEQUENCE) ||
+      !CBB_add_bytes(&cert, tbs_cert_bytes, tbs_cert_len) ||
+      !AddSHA256SignatureAlgorithm(&cert, params.key_params.type()) ||
+      !CBB_add_asn1(&cert, &signature, CBS_ASN1_BITSTRING) ||
+      !CBB_add_u8(&signature, 0 /* no unused bits */) ||
+      !EVP_DigestSignInit(ctx.get(), nullptr, EVP_sha256(), nullptr, pkey) ||
+      // Compute the maximum signature length.
+      !EVP_DigestSign(ctx.get(), nullptr, &sig_len, tbs_cert_bytes,
+                      tbs_cert_len) ||
+      !CBB_reserve(&signature, &sig_out, sig_len) ||
+      // Actually sign the TBSCertificate.
+      !EVP_DigestSign(ctx.get(), sig_out, &sig_len, tbs_cert_bytes,
+                      tbs_cert_len) ||
+      !CBB_did_write(&signature, sig_len) ||
+      !CBB_finish(cbb.get(), &cert_bytes, &cert_len)) {
+    return nullptr;
+  }
+  bssl::UniquePtr<uint8_t> delete_cert_bytes(cert_bytes);
+
+  RTC_LOG(LS_INFO) << "Returning certificate";
+  return bssl::UniquePtr<CRYPTO_BUFFER>(
+      CRYPTO_BUFFER_new(cert_bytes, cert_len, openssl::GetBufferPool()));
+}
+
+}  // namespace
+
+BoringSSLCertificate::BoringSSLCertificate(
+    bssl::UniquePtr<CRYPTO_BUFFER> cert_buffer)
+    : cert_buffer_(std::move(cert_buffer)) {
+  RTC_DCHECK(cert_buffer_ != nullptr);
+}
+
+std::unique_ptr<BoringSSLCertificate> BoringSSLCertificate::Generate(
+    OpenSSLKeyPair* key_pair,
+    const SSLIdentityParams& params) {
+  SSLIdentityParams actual_params(params);
+  if (actual_params.common_name.empty()) {
+    // Use a random string, arbitrarily 8 chars long.
+    actual_params.common_name = CreateRandomString(8);
+  }
+  bssl::UniquePtr<CRYPTO_BUFFER> cert_buffer =
+      MakeCertificate(key_pair->pkey(), actual_params);
+  if (!cert_buffer) {
+    openssl::LogSSLErrors("Generating certificate");
+    return nullptr;
+  }
+  auto ret = std::make_unique<BoringSSLCertificate>(std::move(cert_buffer));
+#if !defined(NDEBUG)
+  PrintCert(ret.get());
+#endif
+  return ret;
+}
+
+std::unique_ptr<BoringSSLCertificate> BoringSSLCertificate::FromPEMString(
+    absl::string_view pem_string) {
+  std::string der;
+  if (!SSLIdentity::PemToDer(kPemTypeCertificate, pem_string, &der)) {
+    return nullptr;
+  }
+  bssl::UniquePtr<CRYPTO_BUFFER> cert_buffer(
+      CRYPTO_BUFFER_new(reinterpret_cast<const uint8_t*>(der.c_str()),
+                        der.length(), openssl::GetBufferPool()));
+  if (!cert_buffer) {
+    return nullptr;
+  }
+  return std::make_unique<BoringSSLCertificate>(std::move(cert_buffer));
+}
+
+#define OID_MATCHES(oid, oid_other)      \
+  (CBS_len(&oid) == sizeof(oid_other) && \
+   0 == memcmp(CBS_data(&oid), oid_other, sizeof(oid_other)))
+
+bool BoringSSLCertificate::GetSignatureDigestAlgorithm(
+    std::string* algorithm) const {
+  CBS oid;
+  if (!openssl::ParseCertificate(cert_buffer_.get(), &oid, nullptr)) {
+    RTC_LOG(LS_ERROR) << "Failed to parse certificate.";
+    return false;
+  }
+  if (OID_MATCHES(oid, kMD5WithRSA) ||
+      OID_MATCHES(oid, kMD5WithRSAEncryption)) {
+    *algorithm = DIGEST_MD5;
+    return true;
+  }
+  if (OID_MATCHES(oid, kECDSAWithSHA1) || OID_MATCHES(oid, kDSAWithSHA1) ||
+      OID_MATCHES(oid, kDSAWithSHA1_2) || OID_MATCHES(oid, kSHA1WithRSA) ||
+      OID_MATCHES(oid, kSHA1WithRSAEncryption)) {
+    *algorithm = DIGEST_SHA_1;
+    return true;
+  }
+  if (OID_MATCHES(oid, kECDSAWithSHA224) ||
+      OID_MATCHES(oid, kSHA224WithRSAEncryption) ||
+      OID_MATCHES(oid, kDSAWithSHA224)) {
+    *algorithm = DIGEST_SHA_224;
+    return true;
+  }
+  if (OID_MATCHES(oid, kECDSAWithSHA256) ||
+      OID_MATCHES(oid, kSHA256WithRSAEncryption) ||
+      OID_MATCHES(oid, kDSAWithSHA256)) {
+    *algorithm = DIGEST_SHA_256;
+    return true;
+  }
+  if (OID_MATCHES(oid, kECDSAWithSHA384) ||
+      OID_MATCHES(oid, kSHA384WithRSAEncryption)) {
+    *algorithm = DIGEST_SHA_384;
+    return true;
+  }
+  if (OID_MATCHES(oid, kECDSAWithSHA512) ||
+      OID_MATCHES(oid, kSHA512WithRSAEncryption)) {
+    *algorithm = DIGEST_SHA_512;
+    return true;
+  }
+  // Unknown algorithm.  There are several unhandled options that are less
+  // common and more complex.
+  RTC_LOG(LS_ERROR) << "Unknown signature algorithm.";
+  algorithm->clear();
+  return false;
+}
+
+bool BoringSSLCertificate::ComputeDigest(absl::string_view algorithm,
+                                         unsigned char* digest,
+                                         size_t size,
+                                         size_t* length) const {
+  return ComputeDigest(cert_buffer_.get(), algorithm, digest, size, length);
+}
+
+bool BoringSSLCertificate::ComputeDigest(const CRYPTO_BUFFER* cert_buffer,
+                                         absl::string_view algorithm,
+                                         unsigned char* digest,
+                                         size_t size,
+                                         size_t* length) {
+  const EVP_MD* md = nullptr;
+  unsigned int n = 0;
+  if (!OpenSSLDigest::GetDigestEVP(algorithm, &md)) {
+    return false;
+  }
+  if (size < static_cast<size_t>(EVP_MD_size(md))) {
+    return false;
+  }
+  if (!EVP_Digest(CRYPTO_BUFFER_data(cert_buffer),
+                  CRYPTO_BUFFER_len(cert_buffer), digest, &n, md, nullptr)) {
+    return false;
+  }
+  *length = n;
+  return true;
+}
+
+BoringSSLCertificate::~BoringSSLCertificate() {}
+
+std::unique_ptr<SSLCertificate> BoringSSLCertificate::Clone() const {
+  return std::make_unique<BoringSSLCertificate>(
+      bssl::UpRef(cert_buffer_.get()));
+}
+
+std::string BoringSSLCertificate::ToPEMString() const {
+  return SSLIdentity::DerToPem(kPemTypeCertificate,
+                               CRYPTO_BUFFER_data(cert_buffer_.get()),
+                               CRYPTO_BUFFER_len(cert_buffer_.get()));
+}
+
+void BoringSSLCertificate::ToDER(Buffer* der_buffer) const {
+  der_buffer->SetData(CRYPTO_BUFFER_data(cert_buffer_.get()),
+                      CRYPTO_BUFFER_len(cert_buffer_.get()));
+}
+
+bool BoringSSLCertificate::operator==(const BoringSSLCertificate& other) const {
+  return CRYPTO_BUFFER_len(cert_buffer_.get()) ==
+             CRYPTO_BUFFER_len(other.cert_buffer_.get()) &&
+         0 == memcmp(CRYPTO_BUFFER_data(cert_buffer_.get()),
+                     CRYPTO_BUFFER_data(other.cert_buffer_.get()),
+                     CRYPTO_BUFFER_len(cert_buffer_.get()));
+}
+
+bool BoringSSLCertificate::operator!=(const BoringSSLCertificate& other) const {
+  return !(*this == other);
+}
+
+int64_t BoringSSLCertificate::CertificateExpirationTime() const {
+  int64_t ret;
+  if (!openssl::ParseCertificate(cert_buffer_.get(), nullptr, &ret)) {
+    RTC_LOG(LS_ERROR) << "Failed to parse certificate.";
+    return -1;
+  }
+  return ret;
+}
+
+}  // namespace rtc