68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
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// Copyright (c) 2011 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 "base/sha1.h"
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#include <windows.h>
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#include <wincrypt.h>
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// This file is not being compiled at the moment (see bug 47218). If we keep
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// sha1 inside base, we cannot depend on src/crypto.
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// #include "crypto/scoped_capi_types.h"
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#include "base/logging.h"
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namespace base {
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std::string SHA1HashString(const std::string& str) {
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ScopedHCRYPTPROV provider;
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if (!CryptAcquireContext(provider.receive(), NULL, NULL, PROV_RSA_FULL,
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CRYPT_VERIFYCONTEXT)) {
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DLOG_GETLASTERROR(ERROR) << "CryptAcquireContext failed";
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return std::string(kSHA1Length, '\0');
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}
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{
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ScopedHCRYPTHASH hash;
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if (!CryptCreateHash(provider, CALG_SHA1, 0, 0, hash.receive())) {
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DLOG_GETLASTERROR(ERROR) << "CryptCreateHash failed";
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return std::string(kSHA1Length, '\0');
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}
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if (!CryptHashData(hash, reinterpret_cast<CONST BYTE*>(str.data()),
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static_cast<DWORD>(str.length()), 0)) {
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DLOG_GETLASTERROR(ERROR) << "CryptHashData failed";
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return std::string(kSHA1Length, '\0');
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}
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DWORD hash_len = 0;
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DWORD buffer_size = sizeof hash_len;
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if (!CryptGetHashParam(hash, HP_HASHSIZE,
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reinterpret_cast<unsigned char*>(&hash_len),
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&buffer_size, 0)) {
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DLOG_GETLASTERROR(ERROR) << "CryptGetHashParam(HP_HASHSIZE) failed";
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return std::string(kSHA1Length, '\0');
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}
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std::string result;
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if (!CryptGetHashParam(hash, HP_HASHVAL,
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// We need the + 1 here not because the call will write a trailing \0,
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// but so that result.length() is correctly set to |hash_len|.
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reinterpret_cast<BYTE*>(WriteInto(&result, hash_len + 1)), &hash_len,
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0))) {
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DLOG_GETLASTERROR(ERROR) << "CryptGetHashParam(HP_HASHVAL) failed";
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return std::string(kSHA1Length, '\0');
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}
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if (hash_len != kSHA1Length) {
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DLOG(ERROR) << "Returned hash value is wrong length: " << hash_len
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<< " should be " << kSHA1Length;
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return std::string(kSHA1Length, '\0');
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}
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return result;
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}
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}
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} // namespace base
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