sha2.c File Reference

#include "postgres.h"
#include "sha2_int.h"

Include dependency graph for sha2.c:

Go to the source code of this file.

Macros
#define	ALLOC(size)   palloc(size)
#define	FREE(ptr)   pfree(ptr)
#define	PG_SHA256_SHORT_BLOCK_LENGTH   (PG_SHA256_BLOCK_LENGTH - 8)
#define	PG_SHA384_SHORT_BLOCK_LENGTH   (PG_SHA384_BLOCK_LENGTH - 16)
#define	PG_SHA512_SHORT_BLOCK_LENGTH   (PG_SHA512_BLOCK_LENGTH - 16)
#define	REVERSE32(w, x)
#define	REVERSE64(w, x)
#define	ADDINC128(w, n)
#define	R(b, x)   ((x) >> (b))
#define	S32(b, x)   (((x) >> (b)) | ((x) << (32 - (b))))
#define	S64(b, x)   (((x) >> (b)) | ((x) << (64 - (b))))
#define	Ch(x, y, z)   (((x) & (y)) ^ ((~(x)) & (z)))
#define	Maj(x, y, z)   (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define	Sigma0_256(x)   (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))
#define	Sigma1_256(x)   (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))
#define	sigma0_256(x)   (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x)))
#define	sigma1_256(x)   (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))
#define	Sigma0_512(x)   (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
#define	Sigma1_512(x)   (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
#define	sigma0_512(x)   (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x)))
#define	sigma1_512(x)   (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x)))

Functions
static void	SHA512_Last (pg_sha512_ctx *context)
static void	SHA256_Transform (pg_sha256_ctx *context, const uint8 *data)
static void	SHA512_Transform (pg_sha512_ctx *context, const uint8 *data)
void	pg_sha256_init (pg_sha256_ctx *context)
void	pg_sha256_update (pg_sha256_ctx *context, const uint8 *data, size_t len)
static void	SHA256_Last (pg_sha256_ctx *context)
void	pg_sha256_final (pg_sha256_ctx *context, uint8 *digest)
void	pg_sha512_init (pg_sha512_ctx *context)
void	pg_sha512_update (pg_sha512_ctx *context, const uint8 *data, size_t len)
void	pg_sha512_final (pg_sha512_ctx *context, uint8 *digest)
void	pg_sha384_init (pg_sha384_ctx *context)
void	pg_sha384_update (pg_sha384_ctx *context, const uint8 *data, size_t len)
void	pg_sha384_final (pg_sha384_ctx *context, uint8 *digest)
void	pg_sha224_init (pg_sha224_ctx *context)
void	pg_sha224_update (pg_sha224_ctx *context, const uint8 *data, size_t len)
void	pg_sha224_final (pg_sha224_ctx *context, uint8 *digest)

Variables
static const uint32	K256 [64]
static const uint32	sha224_initial_hash_value [8]
static const uint32	sha256_initial_hash_value [8]
static const uint64	K512 [80]
static const uint64	sha384_initial_hash_value [8]
static const uint64	sha512_initial_hash_value [8]

Macro Definition Documentation

ADDINC128

#define ADDINC128	(		w,
			n
	)

Value:

    { \
    (w)[0] += (uint64)(n); \
	if ((w)[0] < (n)) { \
        (w)[1]++; \
    } \
}

Definition at line 115 of file sha2.c.

                        { \
    (w)[0] += (uint64)(n); \
	if ((w)[0] < (n)) { \
        (w)[1]++; \
    } \
}

ALLOC

#define ALLOC

(

size

)

palloc(size)

Definition at line 67 of file sha2.c.

Ch

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

Definition at line 139 of file sha2.c.

FREE

#define FREE

(

ptr

)

pfree(ptr)

Definition at line 68 of file sha2.c.

Maj

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

Definition at line 140 of file sha2.c.

PG_SHA256_SHORT_BLOCK_LENGTH

#define PG_SHA256_SHORT_BLOCK_LENGTH   (PG_SHA256_BLOCK_LENGTH - 8)

Definition at line 89 of file sha2.c.

PG_SHA384_SHORT_BLOCK_LENGTH

#define PG_SHA384_SHORT_BLOCK_LENGTH   (PG_SHA384_BLOCK_LENGTH - 16)

Definition at line 90 of file sha2.c.

PG_SHA512_SHORT_BLOCK_LENGTH

#define PG_SHA512_SHORT_BLOCK_LENGTH   (PG_SHA512_BLOCK_LENGTH - 16)

Definition at line 91 of file sha2.c.

R

#define R	(		b,
			x
	)		((x) >> (b))

Definition at line 132 of file sha2.c.

REVERSE32

#define REVERSE32	(		w,
			x
	)

Value:

    { \
    uint32 tmp = (w); \
    tmp = (tmp >> 16) | (tmp << 16); \
    (x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \
}

Definition at line 95 of file sha2.c.

                        { \
    uint32 tmp = (w); \
    tmp = (tmp >> 16) | (tmp << 16); \
    (x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \
}

REVERSE64

#define REVERSE64	(		w,
			x
	)

Value:

    { \
    uint64 tmp = (w); \
    tmp = (tmp >> 32) | (tmp << 32); \
    tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
          ((tmp & 0x00ff00ff00ff00ffULL) << 8); \
    (x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \
          ((tmp & 0x0000ffff0000ffffULL) << 16); \
}

Definition at line 100 of file sha2.c.

                        { \
    uint64 tmp = (w); \
    tmp = (tmp >> 32) | (tmp << 32); \
    tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
          ((tmp & 0x00ff00ff00ff00ffULL) << 8); \
    (x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \
          ((tmp & 0x0000ffff0000ffffULL) << 16); \
}

S32

#define S32	(		b,
			x
	)		(((x) >> (b)) | ((x) << (32 - (b))))

Definition at line 134 of file sha2.c.

S64

#define S64	(		b,
			x
	)		(((x) >> (b)) | ((x) << (64 - (b))))

Definition at line 136 of file sha2.c.

Sigma0_256

#define Sigma0_256

(

x

)

(S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))

Definition at line 143 of file sha2.c.

sigma0_256

#define sigma0_256

(

x

)

(S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x)))

Definition at line 145 of file sha2.c.

Sigma0_512

#define Sigma0_512

(

x

)

(S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))

Definition at line 149 of file sha2.c.

sigma0_512

#define sigma0_512

(

x

)

(S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x)))

Definition at line 151 of file sha2.c.

Sigma1_256

#define Sigma1_256

(

x

)

(S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))

Definition at line 144 of file sha2.c.

sigma1_256

#define sigma1_256

(

x

)

(S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))

Definition at line 146 of file sha2.c.

Sigma1_512

#define Sigma1_512

(

x

)

(S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))

Definition at line 150 of file sha2.c.

sigma1_512

#define sigma1_512

(

x

)

(S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x)))

Definition at line 152 of file sha2.c.

Function Documentation

pg_sha224_final()

void pg_sha224_final	(	pg_sha224_ctx *	context,
		uint8 *	digest
	)

Definition at line 995 of file sha2.c.

{
    /* If no digest buffer is passed, we don't bother doing this: */
    if (digest != NULL)
    {
        SHA256_Last(context);
 
#ifndef WORDS_BIGENDIAN
        {
            /* Convert TO host byte order */
            int         j;
 
            for (j = 0; j < 8; j++)
            {
                REVERSE32(context->state[j], context->state[j]);
            }
        }
#endif
        memcpy(digest, context->state, PG_SHA224_DIGEST_LENGTH);
    }
 
    /* Clean up state data: */
    memset(context, 0, sizeof(pg_sha224_ctx));
}

References fb(), j, memcpy(), PG_SHA224_DIGEST_LENGTH, REVERSE32, SHA256_Last(), and pg_sha256_ctx::state.

Referenced by pg_cryptohash_final().

pg_sha224_init()

void pg_sha224_init

(

pg_sha224_ctx *

context

)

Definition at line 979 of file sha2.c.

{
    if (context == NULL)
        return;
    memcpy(context->state, sha224_initial_hash_value, PG_SHA256_DIGEST_LENGTH);
    memset(context->buffer, 0, PG_SHA256_BLOCK_LENGTH);
    context->bitcount = 0;
}

References pg_sha256_ctx::bitcount, pg_sha256_ctx::buffer, fb(), memcpy(), PG_SHA256_BLOCK_LENGTH, PG_SHA256_DIGEST_LENGTH, sha224_initial_hash_value, and pg_sha256_ctx::state.

Referenced by pg_cryptohash_init().

pg_sha224_update()

void pg_sha224_update	(	pg_sha224_ctx *	context,
		const uint8 *	data,
		size_t	len
	)

Definition at line 989 of file sha2.c.

{
    pg_sha256_update((pg_sha256_ctx *) context, data, len);
}

References data, len, and pg_sha256_update().

Referenced by pg_cryptohash_update().

pg_sha256_final()

void pg_sha256_final	(	pg_sha256_ctx *	context,
		uint8 *	digest
	)

Definition at line 578 of file sha2.c.

{
    /* If no digest buffer is passed, we don't bother doing this: */
    if (digest != NULL)
    {
        SHA256_Last(context);
 
#ifndef WORDS_BIGENDIAN
        {
            /* Convert TO host byte order */
            int         j;
 
            for (j = 0; j < 8; j++)
            {
                REVERSE32(context->state[j], context->state[j]);
            }
        }
#endif
        memcpy(digest, context->state, PG_SHA256_DIGEST_LENGTH);
    }
 
    /* Clean up state data: */
    memset(context, 0, sizeof(pg_sha256_ctx));
}

References fb(), j, memcpy(), PG_SHA256_DIGEST_LENGTH, REVERSE32, SHA256_Last(), and pg_sha256_ctx::state.

Referenced by pg_cryptohash_final().

pg_sha256_init()

void pg_sha256_init

(

pg_sha256_ctx *

context

)

Definition at line 280 of file sha2.c.

{
    if (context == NULL)
        return;
    memcpy(context->state, sha256_initial_hash_value, PG_SHA256_DIGEST_LENGTH);
    memset(context->buffer, 0, PG_SHA256_BLOCK_LENGTH);
    context->bitcount = 0;
}

References pg_sha256_ctx::bitcount, pg_sha256_ctx::buffer, fb(), memcpy(), PG_SHA256_BLOCK_LENGTH, PG_SHA256_DIGEST_LENGTH, sha256_initial_hash_value, and pg_sha256_ctx::state.

Referenced by pg_cryptohash_init().

pg_sha256_update()

void pg_sha256_update	(	pg_sha256_ctx *	context,
		const uint8 *	data,
		size_t	len
	)

Definition at line 477 of file sha2.c.

{
    size_t      freespace,
                usedspace;
 
    /* Calling with no data is valid (we do nothing) */
    if (len == 0)
        return;
 
    usedspace = (context->bitcount >> 3) % PG_SHA256_BLOCK_LENGTH;
    if (usedspace > 0)
    {
        /* Calculate how much free space is available in the buffer */
        freespace = PG_SHA256_BLOCK_LENGTH - usedspace;
 
        if (len >= freespace)
        {
            /* Fill the buffer completely and process it */
            memcpy(&context->buffer[usedspace], data, freespace);
            context->bitcount += freespace << 3;
            len -= freespace;
            data += freespace;
            SHA256_Transform(context, context->buffer);
        }
        else
        {
            /* The buffer is not yet full */
            memcpy(&context->buffer[usedspace], data, len);
            context->bitcount += len << 3;
            /* Clean up: */
            usedspace = freespace = 0;
            return;
        }
    }
    while (len >= PG_SHA256_BLOCK_LENGTH)
    {
        /* Process as many complete blocks as we can */
        SHA256_Transform(context, data);
        context->bitcount += PG_SHA256_BLOCK_LENGTH << 3;
        len -= PG_SHA256_BLOCK_LENGTH;
        data += PG_SHA256_BLOCK_LENGTH;
    }
    if (len > 0)
    {
        /* There's left-overs, so save 'em */
        memcpy(context->buffer, data, len);
        context->bitcount += len << 3;
    }
    /* Clean up: */
    usedspace = freespace = 0;
}

References pg_sha256_ctx::bitcount, pg_sha256_ctx::buffer, data, fb(), len, memcpy(), PG_SHA256_BLOCK_LENGTH, and SHA256_Transform().

Referenced by pg_cryptohash_update(), and pg_sha224_update().

pg_sha384_final()

void pg_sha384_final	(	pg_sha384_ctx *	context,
		uint8 *	digest
	)

Definition at line 951 of file sha2.c.

{
    /* If no digest buffer is passed, we don't bother doing this: */
    if (digest != NULL)
    {
        SHA512_Last((pg_sha512_ctx *) context);
 
        /* Save the hash data for output: */
#ifndef WORDS_BIGENDIAN
        {
            /* Convert TO host byte order */
            int         j;
 
            for (j = 0; j < 6; j++)
            {
                REVERSE64(context->state[j], context->state[j]);
            }
        }
#endif
        memcpy(digest, context->state, PG_SHA384_DIGEST_LENGTH);
    }
 
    /* Zero out state data */
    memset(context, 0, sizeof(pg_sha384_ctx));
}

References fb(), j, memcpy(), PG_SHA384_DIGEST_LENGTH, REVERSE64, SHA512_Last(), and pg_sha512_ctx::state.

Referenced by pg_cryptohash_final().

pg_sha384_init()

void pg_sha384_init

(

pg_sha384_ctx *

context

)

Definition at line 935 of file sha2.c.

{
    if (context == NULL)
        return;
    memcpy(context->state, sha384_initial_hash_value, PG_SHA512_DIGEST_LENGTH);
    memset(context->buffer, 0, PG_SHA384_BLOCK_LENGTH);
    context->bitcount[0] = context->bitcount[1] = 0;
}

References pg_sha512_ctx::bitcount, pg_sha512_ctx::buffer, fb(), memcpy(), PG_SHA384_BLOCK_LENGTH, PG_SHA512_DIGEST_LENGTH, sha384_initial_hash_value, and pg_sha512_ctx::state.

Referenced by pg_cryptohash_init().

pg_sha384_update()

void pg_sha384_update	(	pg_sha384_ctx *	context,
		const uint8 *	data,
		size_t	len
	)

Definition at line 945 of file sha2.c.

{
    pg_sha512_update((pg_sha512_ctx *) context, data, len);
}

References data, len, and pg_sha512_update().

Referenced by pg_cryptohash_update().

pg_sha512_final()

void pg_sha512_final	(	pg_sha512_ctx *	context,
		uint8 *	digest
	)

Definition at line 906 of file sha2.c.

{
    /* If no digest buffer is passed, we don't bother doing this: */
    if (digest != NULL)
    {
        SHA512_Last(context);
 
        /* Save the hash data for output: */
#ifndef WORDS_BIGENDIAN
        {
            /* Convert TO host byte order */
            int         j;
 
            for (j = 0; j < 8; j++)
            {
                REVERSE64(context->state[j], context->state[j]);
            }
        }
#endif
        memcpy(digest, context->state, PG_SHA512_DIGEST_LENGTH);
    }
 
    /* Zero out state data */
    memset(context, 0, sizeof(pg_sha512_ctx));
}

References fb(), j, memcpy(), PG_SHA512_DIGEST_LENGTH, REVERSE64, SHA512_Last(), and pg_sha512_ctx::state.

Referenced by pg_cryptohash_final().

pg_sha512_init()

void pg_sha512_init

(

pg_sha512_ctx *

context

)

Definition at line 606 of file sha2.c.

{
    if (context == NULL)
        return;
    memcpy(context->state, sha512_initial_hash_value, PG_SHA512_DIGEST_LENGTH);
    memset(context->buffer, 0, PG_SHA512_BLOCK_LENGTH);
    context->bitcount[0] = context->bitcount[1] = 0;
}

References pg_sha512_ctx::bitcount, pg_sha512_ctx::buffer, fb(), memcpy(), PG_SHA512_BLOCK_LENGTH, PG_SHA512_DIGEST_LENGTH, sha512_initial_hash_value, and pg_sha512_ctx::state.

Referenced by pg_cryptohash_init().

pg_sha512_update()

void pg_sha512_update	(	pg_sha512_ctx *	context,
		const uint8 *	data,
		size_t	len
	)

Definition at line 803 of file sha2.c.

{
    size_t      freespace,
                usedspace;
 
    /* Calling with no data is valid (we do nothing) */
    if (len == 0)
        return;
 
    usedspace = (context->bitcount[0] >> 3) % PG_SHA512_BLOCK_LENGTH;
    if (usedspace > 0)
    {
        /* Calculate how much free space is available in the buffer */
        freespace = PG_SHA512_BLOCK_LENGTH - usedspace;
 
        if (len >= freespace)
        {
            /* Fill the buffer completely and process it */
            memcpy(&context->buffer[usedspace], data, freespace);
            ADDINC128(context->bitcount, freespace << 3);
            len -= freespace;
            data += freespace;
            SHA512_Transform(context, context->buffer);
        }
        else
        {
            /* The buffer is not yet full */
            memcpy(&context->buffer[usedspace], data, len);
            ADDINC128(context->bitcount, len << 3);
            /* Clean up: */
            usedspace = freespace = 0;
            return;
        }
    }
    while (len >= PG_SHA512_BLOCK_LENGTH)
    {
        /* Process as many complete blocks as we can */
        SHA512_Transform(context, data);
        ADDINC128(context->bitcount, PG_SHA512_BLOCK_LENGTH << 3);
        len -= PG_SHA512_BLOCK_LENGTH;
        data += PG_SHA512_BLOCK_LENGTH;
    }
    if (len > 0)
    {
        /* There's left-overs, so save 'em */
        memcpy(context->buffer, data, len);
        ADDINC128(context->bitcount, len << 3);
    }
    /* Clean up: */
    usedspace = freespace = 0;
}

References ADDINC128, pg_sha512_ctx::bitcount, pg_sha512_ctx::buffer, data, fb(), len, memcpy(), PG_SHA512_BLOCK_LENGTH, and SHA512_Transform().

Referenced by pg_cryptohash_update(), and pg_sha384_update().

SHA256_Last()

static void SHA256_Last ( pg_sha256_ctx *  context )

static

Definition at line 530 of file sha2.c.

{
    unsigned int usedspace;
 
    usedspace = (context->bitcount >> 3) % PG_SHA256_BLOCK_LENGTH;
#ifndef WORDS_BIGENDIAN
    /* Convert FROM host byte order */
    REVERSE64(context->bitcount, context->bitcount);
#endif
    if (usedspace > 0)
    {
        /* Begin padding with a 1 bit: */
        context->buffer[usedspace++] = 0x80;
 
        if (usedspace <= PG_SHA256_SHORT_BLOCK_LENGTH)
        {
            /* Set-up for the last transform: */
            memset(&context->buffer[usedspace], 0, PG_SHA256_SHORT_BLOCK_LENGTH - usedspace);
        }
        else
        {
            if (usedspace < PG_SHA256_BLOCK_LENGTH)
            {
                memset(&context->buffer[usedspace], 0, PG_SHA256_BLOCK_LENGTH - usedspace);
            }
            /* Do second-to-last transform: */
            SHA256_Transform(context, context->buffer);
 
            /* And set-up for the last transform: */
            memset(context->buffer, 0, PG_SHA256_SHORT_BLOCK_LENGTH);
        }
    }
    else
    {
        /* Set-up for the last transform: */
        memset(context->buffer, 0, PG_SHA256_SHORT_BLOCK_LENGTH);
 
        /* Begin padding with a 1 bit: */
        *context->buffer = 0x80;
    }
    /* Set the bit count: */
    *(uint64 *) &context->buffer[PG_SHA256_SHORT_BLOCK_LENGTH] = context->bitcount;
 
    /* Final transform: */
    SHA256_Transform(context, context->buffer);
}

References pg_sha256_ctx::bitcount, pg_sha256_ctx::buffer, fb(), PG_SHA256_BLOCK_LENGTH, PG_SHA256_SHORT_BLOCK_LENGTH, REVERSE64, and SHA256_Transform().

Referenced by pg_sha224_final(), and pg_sha256_final().

SHA256_Transform()

static void SHA256_Transform ( pg_sha256_ctx *  context, const uint8 *  data  )

static

Definition at line 387 of file sha2.c.

{
    uint32      a,
                b,
                c,
                d,
                e,
                f,
                g,
                h,
                s0,
                s1;
    uint32      T1,
                T2,
               *W256;
    int         j;
 
    W256 = (uint32 *) context->buffer;
 
    /* Initialize registers with the prev. intermediate value */
    a = context->state[0];
    b = context->state[1];
    c = context->state[2];
    d = context->state[3];
    e = context->state[4];
    f = context->state[5];
    g = context->state[6];
    h = context->state[7];
 
    j = 0;
    do
    {
        W256[j] = (uint32) data[3] | ((uint32) data[2] << 8) |
            ((uint32) data[1] << 16) | ((uint32) data[0] << 24);
        data += 4;
        /* Apply the SHA-256 compression function to update a..h */
        T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];
        T2 = Sigma0_256(a) + Maj(a, b, c);
        h = g;
        g = f;
        f = e;
        e = d + T1;
        d = c;
        c = b;
        b = a;
        a = T1 + T2;
 
        j++;
    } while (j < 16);
 
    do
    {
        /* Part of the message block expansion: */
        s0 = W256[(j + 1) & 0x0f];
        s0 = sigma0_256(s0);
        s1 = W256[(j + 14) & 0x0f];
        s1 = sigma1_256(s1);
 
        /* Apply the SHA-256 compression function to update a..h */
        T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] +
            (W256[j & 0x0f] += s1 + W256[(j + 9) & 0x0f] + s0);
        T2 = Sigma0_256(a) + Maj(a, b, c);
        h = g;
        g = f;
        f = e;
        e = d + T1;
        d = c;
        c = b;
        b = a;
        a = T1 + T2;
 
        j++;
    } while (j < 64);
 
    /* Compute the current intermediate hash value */
    context->state[0] += a;
    context->state[1] += b;
    context->state[2] += c;
    context->state[3] += d;
    context->state[4] += e;
    context->state[5] += f;
    context->state[6] += g;
    context->state[7] += h;
 
    /* Clean up */
    a = b = c = d = e = f = g = h = T1 = T2 = 0;
}

References a, b, pg_sha256_ctx::buffer, Ch, data, fb(), j, K256, Maj, s1, Sigma0_256, sigma0_256, Sigma1_256, sigma1_256, and pg_sha256_ctx::state.

Referenced by pg_sha256_update(), and SHA256_Last().

SHA512_Last()

static void SHA512_Last ( pg_sha512_ctx *  context )

static

Definition at line 856 of file sha2.c.

{
    unsigned int usedspace;
 
    usedspace = (context->bitcount[0] >> 3) % PG_SHA512_BLOCK_LENGTH;
#ifndef WORDS_BIGENDIAN
    /* Convert FROM host byte order */
    REVERSE64(context->bitcount[0], context->bitcount[0]);
    REVERSE64(context->bitcount[1], context->bitcount[1]);
#endif
    if (usedspace > 0)
    {
        /* Begin padding with a 1 bit: */
        context->buffer[usedspace++] = 0x80;
 
        if (usedspace <= PG_SHA512_SHORT_BLOCK_LENGTH)
        {
            /* Set-up for the last transform: */
            memset(&context->buffer[usedspace], 0, PG_SHA512_SHORT_BLOCK_LENGTH - usedspace);
        }
        else
        {
            if (usedspace < PG_SHA512_BLOCK_LENGTH)
            {
                memset(&context->buffer[usedspace], 0, PG_SHA512_BLOCK_LENGTH - usedspace);
            }
            /* Do second-to-last transform: */
            SHA512_Transform(context, context->buffer);
 
            /* And set-up for the last transform: */
            memset(context->buffer, 0, PG_SHA512_BLOCK_LENGTH - 2);
        }
    }
    else
    {
        /* Prepare for final transform: */
        memset(context->buffer, 0, PG_SHA512_SHORT_BLOCK_LENGTH);
 
        /* Begin padding with a 1 bit: */
        *context->buffer = 0x80;
    }
    /* Store the length of input data (in bits): */
    *(uint64 *) &context->buffer[PG_SHA512_SHORT_BLOCK_LENGTH] = context->bitcount[1];
    *(uint64 *) &context->buffer[PG_SHA512_SHORT_BLOCK_LENGTH + 8] = context->bitcount[0];
 
    /* Final transform: */
    SHA512_Transform(context, context->buffer);
}

References pg_sha512_ctx::bitcount, pg_sha512_ctx::buffer, fb(), PG_SHA512_BLOCK_LENGTH, PG_SHA512_SHORT_BLOCK_LENGTH, REVERSE64, and SHA512_Transform().

Referenced by pg_sha384_final(), and pg_sha512_final().

SHA512_Transform()

static void SHA512_Transform ( pg_sha512_ctx *  context, const uint8 *  data  )

static

Definition at line 713 of file sha2.c.

{
    uint64      a,
                b,
                c,
                d,
                e,
                f,
                g,
                h,
                s0,
                s1;
    uint64      T1,
                T2,
               *W512 = (uint64 *) context->buffer;
    int         j;
 
    /* Initialize registers with the prev. intermediate value */
    a = context->state[0];
    b = context->state[1];
    c = context->state[2];
    d = context->state[3];
    e = context->state[4];
    f = context->state[5];
    g = context->state[6];
    h = context->state[7];
 
    j = 0;
    do
    {
        W512[j] = (uint64) data[7] | ((uint64) data[6] << 8) |
            ((uint64) data[5] << 16) | ((uint64) data[4] << 24) |
            ((uint64) data[3] << 32) | ((uint64) data[2] << 40) |
            ((uint64) data[1] << 48) | ((uint64) data[0] << 56);
        data += 8;
        /* Apply the SHA-512 compression function to update a..h */
        T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];
        T2 = Sigma0_512(a) + Maj(a, b, c);
        h = g;
        g = f;
        f = e;
        e = d + T1;
        d = c;
        c = b;
        b = a;
        a = T1 + T2;
 
        j++;
    } while (j < 16);
 
    do
    {
        /* Part of the message block expansion: */
        s0 = W512[(j + 1) & 0x0f];
        s0 = sigma0_512(s0);
        s1 = W512[(j + 14) & 0x0f];
        s1 = sigma1_512(s1);
 
        /* Apply the SHA-512 compression function to update a..h */
        T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +
            (W512[j & 0x0f] += s1 + W512[(j + 9) & 0x0f] + s0);
        T2 = Sigma0_512(a) + Maj(a, b, c);
        h = g;
        g = f;
        f = e;
        e = d + T1;
        d = c;
        c = b;
        b = a;
        a = T1 + T2;
 
        j++;
    } while (j < 80);
 
    /* Compute the current intermediate hash value */
    context->state[0] += a;
    context->state[1] += b;
    context->state[2] += c;
    context->state[3] += d;
    context->state[4] += e;
    context->state[5] += f;
    context->state[6] += g;
    context->state[7] += h;
 
    /* Clean up */
    a = b = c = d = e = f = g = h = T1 = T2 = 0;
}

References a, b, pg_sha512_ctx::buffer, Ch, data, fb(), j, K512, Maj, s1, Sigma0_512, sigma0_512, Sigma1_512, sigma1_512, and pg_sha512_ctx::state.

Referenced by pg_sha512_update(), and SHA512_Last().

Variable Documentation

K256

const uint32 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
}

Definition at line 166 of file sha2.c.

                               {
    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
};

Referenced by SHA256_Transform().

K512

const uint64 K512[80]

static

Definition at line 210 of file sha2.c.

                               {
    0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
    0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
    0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
    0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
    0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
    0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
    0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
    0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
    0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
    0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
    0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
    0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
    0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
    0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
    0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
    0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
    0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
    0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
    0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
    0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
    0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
    0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
    0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
    0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
    0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
    0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
    0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
    0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
    0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
    0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
    0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
    0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
    0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
    0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
    0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
    0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
    0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
    0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
    0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
    0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
};

Referenced by SHA512_Transform().

sha224_initial_hash_value

const uint32 sha224_initial_hash_value[8]

static

Initial value:

= {
    0xc1059ed8UL,
    0x367cd507UL,
    0x3070dd17UL,
    0xf70e5939UL,
    0xffc00b31UL,
    0x68581511UL,
    0x64f98fa7UL,
    0xbefa4fa4UL
}

Definition at line 186 of file sha2.c.

                                                   {
    0xc1059ed8UL,
    0x367cd507UL,
    0x3070dd17UL,
    0xf70e5939UL,
    0xffc00b31UL,
    0x68581511UL,
    0x64f98fa7UL,
    0xbefa4fa4UL
};

Referenced by pg_sha224_init().

sha256_initial_hash_value

const uint32 sha256_initial_hash_value[8]

static

Initial value:

= {
    0x6a09e667UL,
    0xbb67ae85UL,
    0x3c6ef372UL,
    0xa54ff53aUL,
    0x510e527fUL,
    0x9b05688cUL,
    0x1f83d9abUL,
    0x5be0cd19UL
}

Definition at line 198 of file sha2.c.

                                                   {
    0x6a09e667UL,
    0xbb67ae85UL,
    0x3c6ef372UL,
    0xa54ff53aUL,
    0x510e527fUL,
    0x9b05688cUL,
    0x1f83d9abUL,
    0x5be0cd19UL
};

Referenced by pg_sha256_init().

sha384_initial_hash_value

const uint64 sha384_initial_hash_value[8]

static

Initial value:

= {
    0xcbbb9d5dc1059ed8ULL,
    0x629a292a367cd507ULL,
    0x9159015a3070dd17ULL,
    0x152fecd8f70e5939ULL,
    0x67332667ffc00b31ULL,
    0x8eb44a8768581511ULL,
    0xdb0c2e0d64f98fa7ULL,
    0x47b5481dbefa4fa4ULL
}

Definition at line 254 of file sha2.c.

                                                   {
    0xcbbb9d5dc1059ed8ULL,
    0x629a292a367cd507ULL,
    0x9159015a3070dd17ULL,
    0x152fecd8f70e5939ULL,
    0x67332667ffc00b31ULL,
    0x8eb44a8768581511ULL,
    0xdb0c2e0d64f98fa7ULL,
    0x47b5481dbefa4fa4ULL
};

Referenced by pg_sha384_init().

sha512_initial_hash_value

const uint64 sha512_initial_hash_value[8]

static

Initial value:

= {
    0x6a09e667f3bcc908ULL,
    0xbb67ae8584caa73bULL,
    0x3c6ef372fe94f82bULL,
    0xa54ff53a5f1d36f1ULL,
    0x510e527fade682d1ULL,
    0x9b05688c2b3e6c1fULL,
    0x1f83d9abfb41bd6bULL,
    0x5be0cd19137e2179ULL
}

Definition at line 266 of file sha2.c.

                                                   {
    0x6a09e667f3bcc908ULL,
    0xbb67ae8584caa73bULL,
    0x3c6ef372fe94f82bULL,
    0xa54ff53a5f1d36f1ULL,
    0x510e527fade682d1ULL,
    0x9b05688c2b3e6c1fULL,
    0x1f83d9abfb41bd6bULL,
    0x5be0cd19137e2179ULL
};

Referenced by pg_sha512_init().