mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 14:26:09 +03:00
142 lines
4.1 KiB
C++
142 lines
4.1 KiB
C++
// Copyright 2017 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/cert/internal/simple_path_builder_delegate.h"
|
|
|
|
#include "base/logging.h"
|
|
#include "net/cert/internal/cert_error_params.h"
|
|
#include "net/cert/internal/cert_errors.h"
|
|
#include "net/cert/internal/signature_algorithm.h"
|
|
#include "net/cert/internal/verify_signed_data.h"
|
|
#include "third_party/boringssl/src/include/openssl/bn.h"
|
|
#include "third_party/boringssl/src/include/openssl/bytestring.h"
|
|
#include "third_party/boringssl/src/include/openssl/digest.h"
|
|
#include "third_party/boringssl/src/include/openssl/ec.h"
|
|
#include "third_party/boringssl/src/include/openssl/ec_key.h"
|
|
#include "third_party/boringssl/src/include/openssl/evp.h"
|
|
#include "third_party/boringssl/src/include/openssl/nid.h"
|
|
#include "third_party/boringssl/src/include/openssl/rsa.h"
|
|
|
|
namespace net {
|
|
|
|
DEFINE_CERT_ERROR_ID(SimplePathBuilderDelegate::kRsaModulusTooSmall,
|
|
"RSA modulus too small");
|
|
|
|
namespace {
|
|
|
|
DEFINE_CERT_ERROR_ID(kUnacceptableCurveForEcdsa,
|
|
"Only P-256, P-384, P-521 are supported for ECDSA");
|
|
|
|
// Whitelist of default permitted signature digest algorithms.
|
|
WARN_UNUSED_RESULT bool IsAcceptableDigest(DigestAlgorithm digest) {
|
|
switch (digest) {
|
|
case DigestAlgorithm::Md2:
|
|
case DigestAlgorithm::Md4:
|
|
case DigestAlgorithm::Md5:
|
|
return false;
|
|
|
|
case DigestAlgorithm::Sha1:
|
|
case DigestAlgorithm::Sha256:
|
|
case DigestAlgorithm::Sha384:
|
|
case DigestAlgorithm::Sha512:
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool IsAcceptableCurveForEcdsa(int curve_nid) {
|
|
// Whitelist default permitted named curves.
|
|
switch (curve_nid) {
|
|
case NID_X9_62_prime256v1:
|
|
case NID_secp384r1:
|
|
case NID_secp521r1:
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
SimplePathBuilderDelegate::SimplePathBuilderDelegate(
|
|
size_t min_rsa_modulus_length_bits)
|
|
: min_rsa_modulus_length_bits_(min_rsa_modulus_length_bits) {}
|
|
|
|
void SimplePathBuilderDelegate::CheckPathAfterVerification(
|
|
CertPathBuilderResultPath* path) {
|
|
// Do nothing - consider all candidate paths valid.
|
|
}
|
|
|
|
bool SimplePathBuilderDelegate::IsSignatureAlgorithmAcceptable(
|
|
const SignatureAlgorithm& algorithm,
|
|
CertErrors* errors) {
|
|
// Whitelist default permitted signature algorithms to:
|
|
//
|
|
// RSA PKCS#1 v1.5
|
|
// RSASSA-PSS
|
|
// ECDSA
|
|
//
|
|
// When used with digest algorithms:
|
|
//
|
|
// SHA1
|
|
// SHA256
|
|
// SHA384
|
|
// SHA512
|
|
switch (algorithm.algorithm()) {
|
|
case SignatureAlgorithmId::Dsa:
|
|
return false;
|
|
case SignatureAlgorithmId::Ecdsa:
|
|
case SignatureAlgorithmId::RsaPkcs1:
|
|
return IsAcceptableDigest(algorithm.digest());
|
|
case SignatureAlgorithmId::RsaPss:
|
|
return IsAcceptableDigest(algorithm.digest()) &&
|
|
IsAcceptableDigest(algorithm.ParamsForRsaPss()->mgf1_hash());
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool SimplePathBuilderDelegate::IsPublicKeyAcceptable(EVP_PKEY* public_key,
|
|
CertErrors* errors) {
|
|
int pkey_id = EVP_PKEY_id(public_key);
|
|
if (pkey_id == EVP_PKEY_RSA) {
|
|
// Extract the modulus length from the key.
|
|
RSA* rsa = EVP_PKEY_get0_RSA(public_key);
|
|
if (!rsa)
|
|
return false;
|
|
unsigned int modulus_length_bits = BN_num_bits(rsa->n);
|
|
|
|
if (modulus_length_bits < min_rsa_modulus_length_bits_) {
|
|
errors->AddError(
|
|
kRsaModulusTooSmall,
|
|
CreateCertErrorParams2SizeT("actual", modulus_length_bits, "minimum",
|
|
min_rsa_modulus_length_bits_));
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
if (pkey_id == EVP_PKEY_EC) {
|
|
// Extract the curve name.
|
|
EC_KEY* ec = EVP_PKEY_get0_EC_KEY(public_key);
|
|
if (!ec)
|
|
return false; // Unexpected.
|
|
int curve_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
|
|
|
|
if (!IsAcceptableCurveForEcdsa(curve_nid)) {
|
|
errors->AddError(kUnacceptableCurveForEcdsa);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Unexpected key type.
|
|
return false;
|
|
}
|
|
|
|
} // namespace net
|