1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/sha1.h" 6 7 #include <windows.h> 8 #include <wincrypt.h> 9 10 // This file is not being compiled at the moment (see bug 47218). If we keep 11 // sha1 inside base, we cannot depend on src/crypto. 12 // #include "crypto/scoped_capi_types.h" 13 #include "base/logging.h" 14 15 namespace base { 16 17 std::string SHA1HashString(const std::string& str) { 18 ScopedHCRYPTPROV provider; 19 if (!CryptAcquireContext(provider.receive(), NULL, NULL, PROV_RSA_FULL, 20 CRYPT_VERIFYCONTEXT)) { 21 DLOG_GETLASTERROR(ERROR) << "CryptAcquireContext failed"; 22 return std::string(kSHA1Length, '\0'); 23 } 24 25 { 26 ScopedHCRYPTHASH hash; 27 if (!CryptCreateHash(provider, CALG_SHA1, 0, 0, hash.receive())) { 28 DLOG_GETLASTERROR(ERROR) << "CryptCreateHash failed"; 29 return std::string(kSHA1Length, '\0'); 30 } 31 32 if (!CryptHashData(hash, reinterpret_cast<CONST BYTE*>(str.data()), 33 static_cast<DWORD>(str.length()), 0)) { 34 DLOG_GETLASTERROR(ERROR) << "CryptHashData failed"; 35 return std::string(kSHA1Length, '\0'); 36 } 37 38 DWORD hash_len = 0; 39 DWORD buffer_size = sizeof hash_len; 40 if (!CryptGetHashParam(hash, HP_HASHSIZE, 41 reinterpret_cast<unsigned char*>(&hash_len), 42 &buffer_size, 0)) { 43 DLOG_GETLASTERROR(ERROR) << "CryptGetHashParam(HP_HASHSIZE) failed"; 44 return std::string(kSHA1Length, '\0'); 45 } 46 47 std::string result; 48 if (!CryptGetHashParam(hash, HP_HASHVAL, 49 // We need the + 1 here not because the call will write a trailing \0, 50 // but so that result.length() is correctly set to |hash_len|. 51 reinterpret_cast<BYTE*>(WriteInto(&result, hash_len + 1)), &hash_len, 52 0))) { 53 DLOG_GETLASTERROR(ERROR) << "CryptGetHashParam(HP_HASHVAL) failed"; 54 return std::string(kSHA1Length, '\0'); 55 } 56 57 if (hash_len != kSHA1Length) { 58 DLOG(ERROR) << "Returned hash value is wrong length: " << hash_len 59 << " should be " << kSHA1Length; 60 return std::string(kSHA1Length, '\0'); 61 } 62 63 return result; 64 } 65 } 66 67 } // namespace base 68
