SHA1.C File Reference

Functions to compute SHA1 message digest of files or memory blocks according to the NIST specification FIPS-180-1. More...

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Macros
#define	K1   0x5a827999
#define	K2   0x6ed9eba1
#define	K3   0x8f1bbcdc
#define	K4   0xca62c1d6
#define	F1(B, C, D)   ( D ^ ( B & ( C ^ D ) ) )
#define	F2(B, C, D)   (B ^ C ^ D)
#define	F3(B, C, D)   ( ( B & C ) | ( D & ( B | C ) ) )
#define	F4(B, C, D)   (B ^ C ^ D)
#define	rol_uint32(x, nbits)   (((x) << (nbits)) | ((x) >> (32 - (nbits))))
#define	M(I)
#define	R(A, B, C, D, E, F, K, M)

Detailed Description

Functions to compute SHA1 message digest of files or memory blocks according to the NIST specification FIPS-180-1.

Original source file SHA1.C

Adapted from the gnulib implementation written by Scott G. Miller with credits to Robert Klep rober.nosp@m.t@il.nosp@m.se.nl – Expansion function fix

Copyright (C) 2000, 2001, 2003, 2004, 2005, 2006, 2008 Free Software Foundation, Inc.

Definition in file SHA1.C.

Macro Definition Documentation

K1

#define K1   0x5a827999

Definition at line 167 of file SHA1.C.

K2

#define K2   0x6ed9eba1

Definition at line 168 of file SHA1.C.

K3

#define K3   0x8f1bbcdc

Definition at line 169 of file SHA1.C.

K4

#define K4   0xca62c1d6

Definition at line 170 of file SHA1.C.

F1

#define F1	(		B,
			C,
			D
	)		( D ^ ( B & ( C ^ D ) ) )

Definition at line 173 of file SHA1.C.

F2

#define F2	(		B,
			C,
			D
	)		(B ^ C ^ D)

Definition at line 174 of file SHA1.C.

F3

#define F3	(		B,
			C,
			D
	)		( ( B & C ) | ( D & ( B | C ) ) )

Definition at line 175 of file SHA1.C.

F4

#define F4	(		B,
			C,
			D
	)		(B ^ C ^ D)

Definition at line 176 of file SHA1.C.

rol_uint32

#define rol_uint32	(		x,
			nbits
	)		(((x) << (nbits)) | ((x) >> (32 - (nbits))))

M

#define M

(

I

)

Value:

               ( tm = x[I & 0x0F] ^ x[(I-14) & 0x0F]                         \
               ^ x[(I-8) & 0x0F] ^ x[(I-3) & 0x0F]                             \
               , (x[I & 0x0F] = rol_uint32(tm, 1)) )

R

#define R	(		A,
			B,
			C,
			D,
			E,
			F,
			K,
			M
	)

Value:

        do                                                                     \
        {                                                                      \
            E += rol_uint32(A, 5) + F(B, C, D) + K + M;                        \
            B = rol_uint32(B, 30);                                             \
        } while (0)