sha256.c File Reference

#include <stdlib.h>
#include <string.h>
#include <util/sha2.h>
#include "md32_common.h"

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Macros
#define	OPENSSL_VERSION_TEXT   "OpenSSL 1.0.2a 19 Mar 2015"
#define	OPENSSL_VERSION_PTEXT   " part of " OPENSSL_VERSION_TEXT
#define	DATA_ORDER_IS_BIG_ENDIAN
#define	HASH_LONG   SHA_LONG
#define	HASH_CTX   SHA256_CTX
#define	HASH_CBLOCK   SHA_CBLOCK
#define	HASH_MAKE_STRING(c, s)
#define	HASH_UPDATE   SHA256_Update
#define	HASH_TRANSFORM   SHA256_Transform
#define	HASH_FINAL   SHA256_Final
#define	HASH_BLOCK_DATA_ORDER   sha256_block_data_order
#define	Sigma0(x)   (ROTATE((x),30) ^ ROTATE((x),19) ^ ROTATE((x),10))
#define	Sigma1(x)   (ROTATE((x),26) ^ ROTATE((x),21) ^ ROTATE((x),7))
#define	sigma0(x)   (ROTATE((x),25) ^ ROTATE((x),14) ^ ((x)>>3))
#define	sigma1(x)   (ROTATE((x),15) ^ ROTATE((x),13) ^ ((x)>>10))
#define	Ch(x, y, z)   (((x) & (y)) ^ ((~(x)) & (z)))
#define	Maj(x, y, z)   (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define	ROUND_00_15(i, a, b, c, d, e, f, g, h)
#define	ROUND_16_63(i, a, b, c, d, e, f, g, h, X)

Functions
static void	OPENSSL_cleanse (void *ptr, size_t len)
	fips_md_init_ctx (SHA224, SHA256)
	fips_md_init (SHA256)
unsigned char *	SHA224 (const unsigned char *d, size_t n, unsigned char *md)
unsigned char *	SHA256 (const unsigned char *d, size_t n, unsigned char *md)
int	SHA224_Update (SHA256_CTX *c, const void *data, size_t len)
int	SHA224_Final (unsigned char *md, SHA256_CTX *c)
static void	sha256_block_data_order (SHA256_CTX *ctx, const void *in, size_t num)

Variables
const char	SHA256_version [] = "SHA-256" OPENSSL_VERSION_PTEXT
static unsigned char	cleanse_ctr = 0
static const SHA_LONG	K256 [64]

Macro Definition Documentation

Ch

#define Ch	(		x,
			y,
			z
	)		(((x) & (y)) ^ ((~(x)) & (z)))

DATA_ORDER_IS_BIG_ENDIAN

#define DATA_ORDER_IS_BIG_ENDIAN

HASH_BLOCK_DATA_ORDER

#define HASH_BLOCK_DATA_ORDER   sha256_block_data_order

HASH_CBLOCK

#define HASH_CBLOCK   SHA_CBLOCK

HASH_CTX

#define HASH_CTX   SHA256_CTX

HASH_FINAL

#define HASH_FINAL   SHA256_Final

HASH_LONG

#define HASH_LONG   SHA_LONG

HASH_MAKE_STRING

#define HASH_MAKE_STRING	(		c,
			s
	)

Value:

        do {    \
        unsigned long ll;               \
        unsigned int  nn;               \
        switch ((c)->md_len)            \
        {   case SHA224_DIGEST_LENGTH:  \
                for (nn=0;nn<SHA224_DIGEST_LENGTH/4;nn++)       \
                {   ll=(c)->h[nn]; (void)HOST_l2c(ll,(s));   }  \
                break;                  \
            case SHA256_DIGEST_LENGTH:  \
                for (nn=0;nn<SHA256_DIGEST_LENGTH/4;nn++)       \
                {   ll=(c)->h[nn]; (void)HOST_l2c(ll,(s));   }  \
                break;                  \
            default:                    \
                if ((c)->md_len > SHA256_DIGEST_LENGTH) \
                    return 0;                           \
                for (nn=0;nn<(c)->md_len/4;nn++)                \
                {   ll=(c)->h[nn]; (void)HOST_l2c(ll,(s));   }  \
                break;                  \
        }                               \
        } while (0)

HASH_TRANSFORM

#define HASH_TRANSFORM   SHA256_Transform

HASH_UPDATE

#define HASH_UPDATE   SHA256_Update

Maj

#define Maj	(		x,
			y,
			z
	)		(((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))

OPENSSL_VERSION_PTEXT

#define OPENSSL_VERSION_PTEXT   " part of " OPENSSL_VERSION_TEXT

OPENSSL_VERSION_TEXT

#define OPENSSL_VERSION_TEXT   "OpenSSL 1.0.2a 19 Mar 2015"

ROUND_00_15

#define ROUND_00_15	(		i,
			a,
			b,
			c,
			d,
			e,
			f,
			g,
			h
	)

Value:

        do {    \
        T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i];      \
        h = Sigma0(a) + Maj(a,b,c);                     \
        d += T1;        h += T1;                } while (0)

ROUND_16_63

#define ROUND_16_63	(		i,
			a,
			b,
			c,
			d,
			e,
			f,
			g,
			h,
			X
	)

Value:

        do {    \
        s0 = X[(i+1)&0x0f];     s0 = sigma0(s0);        \
        s1 = X[(i+14)&0x0f];    s1 = sigma1(s1);        \
        T1 = X[(i)&0x0f] += s0 + s1 + X[(i+9)&0x0f];    \
        ROUND_00_15(i,a,b,c,d,e,f,g,h);         } while (0)

Sigma0

#define Sigma0

(

x

)

(ROTATE((x),30) ^ ROTATE((x),19) ^ ROTATE((x),10))

sigma0

#define sigma0

(

x

)

(ROTATE((x),25) ^ ROTATE((x),14) ^ ((x)>>3))

Sigma1

#define Sigma1

(

x

)

(ROTATE((x),26) ^ ROTATE((x),21) ^ ROTATE((x),7))

sigma1

#define sigma1

(

x

)

(ROTATE((x),15) ^ ROTATE((x),13) ^ ((x)>>10))

Function Documentation

fips_md_init()

fips_md_init

(

SHA256

)

References SHA256_DIGEST_LENGTH.

fips_md_init_ctx()

fips_md_init_ctx	(	SHA224	,
		SHA256
	)

References SHA224_DIGEST_LENGTH.

OPENSSL_cleanse()

static void OPENSSL_cleanse ( void *  ptr, size_t  len  )

static

References cleanse_ctr, and p().

Referenced by SHA224(), and SHA256().

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SHA224()

unsigned char* SHA224	(	const unsigned char *	d,
		size_t	n,
		unsigned char *	md
	)

References OPENSSL_cleanse(), SHA224_DIGEST_LENGTH, SHA224_Init(), SHA256_Final(), and SHA256_Update().

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SHA224_Final()

int SHA224_Final	(	unsigned char *	md,
		SHA256_CTX *	c
	)

References SHA256_Final().

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SHA224_Update()

int SHA224_Update	(	SHA256_CTX *	c,
		const void *	data,
		size_t	len
	)

References SHA256_Update().

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SHA256()

unsigned char* SHA256	(	const unsigned char *	d,
		size_t	n,
		unsigned char *	md
	)

References OPENSSL_cleanse(), SHA256_DIGEST_LENGTH, SHA256_Final(), SHA256_Init(), and SHA256_Update().

Referenced by hash().

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sha256_block_data_order()

static void sha256_block_data_order ( SHA256_CTX *  ctx, const void *  in, size_t  num  )

static

References SHA256state_st::h, MD32_REG_T, ROUND_00_15, ROUND_16_63, SHA256_CBLOCK, and SHA_LONG.

Variable Documentation

cleanse_ctr

unsigned char cleanse_ctr = 0

static

Referenced by OPENSSL_cleanse().

K256

const SHA_LONG K256[64]

static

Initial value:

= {
    0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
    0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
    0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
    0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
    0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
    0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
    0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
    0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
    0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
    0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
    0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
    0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
    0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
    0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
    0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
    0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
}

SHA256_version

const char SHA256_version[] = "SHA-256" OPENSSL_VERSION_PTEXT