119 lines
3.1 KiB
C++
119 lines
3.1 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "crypto/signature_creator.h"
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#include <cryptohi.h>
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#include <keyhi.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include "base/logging.h"
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#include "base/memory/scoped_ptr.h"
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#include "crypto/nss_util.h"
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#include "crypto/rsa_private_key.h"
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namespace crypto {
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namespace {
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SECOidTag ToNSSSigOid(SignatureCreator::HashAlgorithm hash_alg) {
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switch (hash_alg) {
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case SignatureCreator::SHA1:
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return SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION;
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case SignatureCreator::SHA256:
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return SEC_OID_PKCS1_SHA256_WITH_RSA_ENCRYPTION;
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}
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return SEC_OID_UNKNOWN;
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}
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SECOidTag ToNSSHashOid(SignatureCreator::HashAlgorithm hash_alg) {
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switch (hash_alg) {
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case SignatureCreator::SHA1:
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return SEC_OID_SHA1;
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case SignatureCreator::SHA256:
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return SEC_OID_SHA256;
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}
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return SEC_OID_UNKNOWN;
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}
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} // namespace
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SignatureCreator::~SignatureCreator() {
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if (sign_context_) {
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SGN_DestroyContext(sign_context_, PR_TRUE);
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sign_context_ = NULL;
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}
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}
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// static
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SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key,
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HashAlgorithm hash_alg) {
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scoped_ptr<SignatureCreator> result(new SignatureCreator);
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result->sign_context_ = SGN_NewContext(ToNSSSigOid(hash_alg), key->key());
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if (!result->sign_context_) {
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NOTREACHED();
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return NULL;
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}
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SECStatus rv = SGN_Begin(result->sign_context_);
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if (rv != SECSuccess) {
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NOTREACHED();
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return NULL;
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}
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return result.release();
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}
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// static
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bool SignatureCreator::Sign(RSAPrivateKey* key,
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HashAlgorithm hash_alg,
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const uint8_t* data,
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int data_len,
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std::vector<uint8_t>* signature) {
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SECItem data_item;
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data_item.type = siBuffer;
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data_item.data = const_cast<unsigned char*>(data);
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data_item.len = data_len;
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SECItem signature_item;
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SECStatus rv = SGN_Digest(key->key(), ToNSSHashOid(hash_alg), &signature_item,
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&data_item);
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if (rv != SECSuccess) {
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NOTREACHED();
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return false;
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}
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signature->assign(signature_item.data,
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signature_item.data + signature_item.len);
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SECITEM_FreeItem(&signature_item, PR_FALSE);
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return true;
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}
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bool SignatureCreator::Update(const uint8_t* data_part, int data_part_len) {
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SECStatus rv = SGN_Update(sign_context_, data_part, data_part_len);
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if (rv != SECSuccess) {
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NOTREACHED();
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return false;
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}
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return true;
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}
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bool SignatureCreator::Final(std::vector<uint8_t>* signature) {
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SECItem signature_item;
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SECStatus rv = SGN_End(sign_context_, &signature_item);
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if (rv != SECSuccess) {
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return false;
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}
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signature->assign(signature_item.data,
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signature_item.data + signature_item.len);
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SECITEM_FreeItem(&signature_item, PR_FALSE);
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return true;
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}
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SignatureCreator::SignatureCreator() : sign_context_(NULL) {
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EnsureNSSInit();
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}
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} // namespace crypto
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