1 /*
2  * This code is derived from (original license follows):
3  *
4  * This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
5  * MD5 Message-Digest Algorithm (RFC 1321).
6  *
7  * Homepage:
8  * http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
9  *
10  * Author:
11  * Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
12  *
13  * This software was written by Alexander Peslyak in 2001.  No copyright is
14  * claimed, and the software is hereby placed in the public domain.
15  * In case this attempt to disclaim copyright and place the software in the
16  * public domain is deemed null and void, then the software is
17  * Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
18  * general public under the following terms:
19  *
20  * Redistribution and use in source and binary forms, with or without
21  * modification, are permitted.
22  *
23  * There's ABSOLUTELY NO WARRANTY, express or implied.
24  *
25  * See md5.c for more information.
26  */
27 
28 #ifndef LLVM_SUPPORT_MD5_H
29 #define LLVM_SUPPORT_MD5_H
30 
31 #include "llvm/ADT/ArrayRef.h"
32 #include "llvm/ADT/SmallString.h"
33 #include "llvm/Support/DataTypes.h"
34 
35 namespace llvm {
36 
37 class MD5 {
38   // Any 32-bit or wider unsigned integer data type will do.
39   typedef uint32_t MD5_u32plus;
40 
41   MD5_u32plus a, b, c, d;
42   MD5_u32plus hi, lo;
43   uint8_t buffer[64];
44   MD5_u32plus block[16];
45 
46 public:
47   typedef uint8_t MD5Result[16];
48 
49   MD5();
50 
51   /// \brief Updates the hash for the byte stream provided.
52   void update(ArrayRef<uint8_t> Data);
53 
54   /// \brief Updates the hash for the StringRef provided.
55   void update(StringRef Str);
56 
57   /// \brief Finishes off the hash and puts the result in result.
58   void final(MD5Result &Result);
59 
60   /// \brief Translates the bytes in \p Res to a hex string that is
61   /// deposited into \p Str. The result will be of length 32.
62   static void stringifyResult(MD5Result &Result, SmallString<32> &Str);
63 
64 private:
65   const uint8_t *body(ArrayRef<uint8_t> Data);
66 };
67 
68 }
69 
70 #endif
71