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1 | /* |
2 | ** Copyright 2005 Double Precision, Inc. |
3 | ** See COPYING for distribution information. |
4 | */ |
5 | |
6 | #include "sha1.h" |
7 | #include <string.h> |
8 | |
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9 | |
10 | static const char base64tab[]= |
11 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
12 | |
13 | const char *sha256_hash(const char *passw) |
14 | { |
15 | SHA256_DIGEST sha256buf; |
16 | static char hash_buffer[1+(sizeof(sha256buf)+2)/3*4]; |
17 | int a=0,b=0,c=0; |
18 | int i, j; |
19 | int d, e, f, g; |
20 | |
21 | sha256_digest(passw, strlen(passw), sha256buf); |
22 | |
23 | j=0; |
24 | |
25 | for (i=0; i<sizeof(sha256buf); i += 3) |
26 | { |
27 | a=sha256buf[i]; |
28 | b= i+1 < sizeof(sha256buf) ? sha256buf[i+1]:0; |
29 | c= i+2 < sizeof(sha256buf) ? sha256buf[i+2]:0; |
30 | |
31 | d=base64tab[ a >> 2 ]; |
32 | e=base64tab[ ((a & 3 ) << 4) | (b >> 4)]; |
33 | f=base64tab[ ((b & 15) << 2) | (c >> 6)]; |
34 | g=base64tab[ c & 63 ]; |
35 | if (i + 1 >= sizeof(sha256buf)) f='='; |
36 | if (i + 2 >= sizeof(sha256buf)) g='='; |
37 | hash_buffer[j++]=d; |
38 | hash_buffer[j++]=e; |
39 | hash_buffer[j++]=f; |
40 | hash_buffer[j++]=g; |
41 | } |
42 | |
43 | hash_buffer[j]=0; |
44 | return (hash_buffer); |
45 | } |