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SHA1.h File Reference

SHA-1 computation class. More...

#include <stdio.h>
#include <memory.h>
#include <string.h>
#include "Types.h"

Defines

#define MAX_FILE_READ_BUFFER   8000
#define SHA1_LENGTH   20
#define SHABLK0(i)   (block->l[i])
#define SHABLK(i)
#define R0(v, w, x, y, z, i)   { z+=((w&(x^y))^y)+SHABLK0(i)+0x5A827999+ROL32(v,5); w=ROL32(w,30); }
#define R1(v, w, x, y, z, i)   { z+=((w&(x^y))^y)+SHABLK(i)+0x5A827999+ROL32(v,5); w=ROL32(w,30); }
#define R2(v, w, x, y, z, i)   { z+=(w^x^y)+SHABLK(i)+0x6ED9EBA1+ROL32(v,5); w=ROL32(w,30); }
#define R3(v, w, x, y, z, i)   { z+=(((w|x)&y)|(w&x))+SHABLK(i)+0x8F1BBCDC+ROL32(v,5); w=ROL32(w,30); }
#define R4(v, w, x, y, z, i)   { z+=(w^x^y)+SHABLK(i)+0xCA62C1D6+ROL32(v,5); w=ROL32(w,30); }


Detailed Description

SHA-1 computation class.

100% free public domain implementation of the SHA-1 algorithm by Dominik Reichl <Dominik.Reichl@tiscali.de>

=== Test Vectors (from FIPS PUB 180-1) ===

"abc" A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D

"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1

A million repetitions of "a" 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F


Define Documentation

#define MAX_FILE_READ_BUFFER   8000
 

Size of the read buffer when computing SHA-1 sum on a file

#define R0 v,
w,
x,
y,
z,
 )     { z+=((w&(x^y))^y)+SHABLK0(i)+0x5A827999+ROL32(v,5); w=ROL32(w,30); }
 

#define R1 v,
w,
x,
y,
z,
 )     { z+=((w&(x^y))^y)+SHABLK(i)+0x5A827999+ROL32(v,5); w=ROL32(w,30); }
 

#define R2 v,
w,
x,
y,
z,
 )     { z+=(w^x^y)+SHABLK(i)+0x6ED9EBA1+ROL32(v,5); w=ROL32(w,30); }
 

#define R3 v,
w,
x,
y,
z,
 )     { z+=(((w|x)&y)|(w&x))+SHABLK(i)+0x8F1BBCDC+ROL32(v,5); w=ROL32(w,30); }
 

#define R4 v,
w,
x,
y,
z,
 )     { z+=(w^x^y)+SHABLK(i)+0xCA62C1D6+ROL32(v,5); w=ROL32(w,30); }
 

#define SHA1_LENGTH   20
 

Size of an SHA-1 key in byte

#define SHABLK  ) 
 

Value:

(block->l[i&15] = ROL32(block->l[(i+13)&15] ^ block->l[(i+8)&15] \
                                    ^ block->l[(i+2)&15] ^ block->l[i&15],1))

#define SHABLK0  )     (block->l[i])
 


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