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.
5 // The original source code is from:
6 // http://src.chromium.org/viewvc/chrome/trunk/src/base/md5.h?revision=94203
8 #ifndef I18N_ADDRESSINPUT_UTIL_MD5_H_
9 #define I18N_ADDRESSINPUT_UTIL_MD5_H_
15 namespace addressinput {
17 // MD5 stands for Message Digest algorithm 5.
18 // MD5 is a robust hash function, designed for cyptography, but often used
19 // for file checksums. The code is complex and slow, but has few
22 // http://en.wikipedia.org/wiki/MD5
24 // These functions perform MD5 operations. The simplest call is MD5Sum() to
25 // generate the MD5 sum of the given data.
27 // You can also compute the MD5 sum of data incrementally by making multiple
28 // calls to MD5Update():
29 // MD5Context ctx; // intermediate MD5 data: do not use
31 // MD5Update(&ctx, data1, length1);
32 // MD5Update(&ctx, data2, length2);
35 // MD5Digest digest; // the result of the computation
36 // MD5Final(&digest, &ctx);
38 // You can call MD5DigestToBase16() to generate a string of the digest.
40 // The output of an MD5 operation.
45 // Used for storing intermediate data during an MD5 computation. Callers
46 // should not access the data.
47 typedef char MD5Context[88];
49 // Computes the MD5 sum of the given data buffer with the given length.
50 // The given 'digest' structure will be filled with the result data.
51 void MD5Sum(const void* data, size_t length, MD5Digest* digest);
53 // Initializes the given MD5 context structure for subsequent calls to
55 void MD5Init(MD5Context* context);
57 // For the given buffer of |data| as a StringPiece, updates the given MD5
58 // context with the sum of the data. You can call this any number of times
59 // during the computation, except that MD5Init() must have been called first.
60 void MD5Update(MD5Context* context, const std::string& data);
62 // Finalizes the MD5 operation and fills the buffer with the digest.
63 void MD5Final(MD5Digest* digest, MD5Context* context);
65 // Converts a digest into human-readable hexadecimal.
66 std::string MD5DigestToBase16(const MD5Digest& digest);
68 // Returns the MD5 (in hexadecimal) of a string.
69 std::string MD5String(const std::string& str);
71 } // namespace addressinput
74 #endif // I18N_ADDRESSINPUT_UTIL_MD5_H_