internal-sha2.c

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/*
 * internal.c
 *      Wrapper for builtin functions
 *
 * Copyright (c) 2001 Marko Kreen
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * contrib/pgcrypto/internal-sha2.c
 */

#include "postgres.h"

#include <time.h>

#include "px.h"
#include "sha2.h"

void        init_sha224(PX_MD *h);
void        init_sha256(PX_MD *h);
void        init_sha384(PX_MD *h);
void        init_sha512(PX_MD *h);

/* SHA224 */

static unsigned
int_sha224_len(PX_MD *h)
{
    return SHA224_DIGEST_LENGTH;
}

static unsigned
int_sha224_block_len(PX_MD *h)
{
    return SHA224_BLOCK_LENGTH;
}

static void
int_sha224_update(PX_MD *h, const uint8 *data, unsigned dlen)
{
    SHA224_CTX *ctx = (SHA224_CTX *) h->p.ptr;

    SHA224_Update(ctx, data, dlen);
}

static void
int_sha224_reset(PX_MD *h)
{
    SHA224_CTX *ctx = (SHA224_CTX *) h->p.ptr;

    SHA224_Init(ctx);
}

static void
int_sha224_finish(PX_MD *h, uint8 *dst)
{
    SHA224_CTX *ctx = (SHA224_CTX *) h->p.ptr;

    SHA224_Final(dst, ctx);
}

static void
int_sha224_free(PX_MD *h)
{
    SHA224_CTX *ctx = (SHA224_CTX *) h->p.ptr;

    memset(ctx, 0, sizeof(*ctx));
    px_free(ctx);
    px_free(h);
}

/* SHA256 */

static unsigned
int_sha256_len(PX_MD *h)
{
    return SHA256_DIGEST_LENGTH;
}

static unsigned
int_sha256_block_len(PX_MD *h)
{
    return SHA256_BLOCK_LENGTH;
}

static void
int_sha256_update(PX_MD *h, const uint8 *data, unsigned dlen)
{
    SHA256_CTX *ctx = (SHA256_CTX *) h->p.ptr;

    SHA256_Update(ctx, data, dlen);
}

static void
int_sha256_reset(PX_MD *h)
{
    SHA256_CTX *ctx = (SHA256_CTX *) h->p.ptr;

    SHA256_Init(ctx);
}

static void
int_sha256_finish(PX_MD *h, uint8 *dst)
{
    SHA256_CTX *ctx = (SHA256_CTX *) h->p.ptr;

    SHA256_Final(dst, ctx);
}

static void
int_sha256_free(PX_MD *h)
{
    SHA256_CTX *ctx = (SHA256_CTX *) h->p.ptr;

    memset(ctx, 0, sizeof(*ctx));
    px_free(ctx);
    px_free(h);
}

/* SHA384 */

static unsigned
int_sha384_len(PX_MD *h)
{
    return SHA384_DIGEST_LENGTH;
}

static unsigned
int_sha384_block_len(PX_MD *h)
{
    return SHA384_BLOCK_LENGTH;
}

static void
int_sha384_update(PX_MD *h, const uint8 *data, unsigned dlen)
{
    SHA384_CTX *ctx = (SHA384_CTX *) h->p.ptr;

    SHA384_Update(ctx, data, dlen);
}

static void
int_sha384_reset(PX_MD *h)
{
    SHA384_CTX *ctx = (SHA384_CTX *) h->p.ptr;

    SHA384_Init(ctx);
}

static void
int_sha384_finish(PX_MD *h, uint8 *dst)
{
    SHA384_CTX *ctx = (SHA384_CTX *) h->p.ptr;

    SHA384_Final(dst, ctx);
}

static void
int_sha384_free(PX_MD *h)
{
    SHA384_CTX *ctx = (SHA384_CTX *) h->p.ptr;

    memset(ctx, 0, sizeof(*ctx));
    px_free(ctx);
    px_free(h);
}

/* SHA512 */

static unsigned
int_sha512_len(PX_MD *h)
{
    return SHA512_DIGEST_LENGTH;
}

static unsigned
int_sha512_block_len(PX_MD *h)
{
    return SHA512_BLOCK_LENGTH;
}

static void
int_sha512_update(PX_MD *h, const uint8 *data, unsigned dlen)
{
    SHA512_CTX *ctx = (SHA512_CTX *) h->p.ptr;

    SHA512_Update(ctx, data, dlen);
}

static void
int_sha512_reset(PX_MD *h)
{
    SHA512_CTX *ctx = (SHA512_CTX *) h->p.ptr;

    SHA512_Init(ctx);
}

static void
int_sha512_finish(PX_MD *h, uint8 *dst)
{
    SHA512_CTX *ctx = (SHA512_CTX *) h->p.ptr;

    SHA512_Final(dst, ctx);
}

static void
int_sha512_free(PX_MD *h)
{
    SHA512_CTX *ctx = (SHA512_CTX *) h->p.ptr;

    memset(ctx, 0, sizeof(*ctx));
    px_free(ctx);
    px_free(h);
}

/* init functions */

void
init_sha224(PX_MD *md)
{
    SHA224_CTX *ctx;

    ctx = px_alloc(sizeof(*ctx));
    memset(ctx, 0, sizeof(*ctx));

    md->p.ptr = ctx;

    md->result_size = int_sha224_len;
    md->block_size = int_sha224_block_len;
    md->reset = int_sha224_reset;
    md->update = int_sha224_update;
    md->finish = int_sha224_finish;
    md->free = int_sha224_free;

    md->reset(md);
}

void
init_sha256(PX_MD *md)
{
    SHA256_CTX *ctx;

    ctx = px_alloc(sizeof(*ctx));
    memset(ctx, 0, sizeof(*ctx));

    md->p.ptr = ctx;

    md->result_size = int_sha256_len;
    md->block_size = int_sha256_block_len;
    md->reset = int_sha256_reset;
    md->update = int_sha256_update;
    md->finish = int_sha256_finish;
    md->free = int_sha256_free;

    md->reset(md);
}

void
init_sha384(PX_MD *md)
{
    SHA384_CTX *ctx;

    ctx = px_alloc(sizeof(*ctx));
    memset(ctx, 0, sizeof(*ctx));

    md->p.ptr = ctx;

    md->result_size = int_sha384_len;
    md->block_size = int_sha384_block_len;
    md->reset = int_sha384_reset;
    md->update = int_sha384_update;
    md->finish = int_sha384_finish;
    md->free = int_sha384_free;

    md->reset(md);
}

void
init_sha512(PX_MD *md)
{
    SHA512_CTX *ctx;

    ctx = px_alloc(sizeof(*ctx));
    memset(ctx, 0, sizeof(*ctx));

    md->p.ptr = ctx;

    md->result_size = int_sha512_len;
    md->block_size = int_sha512_block_len;
    md->reset = int_sha512_reset;
    md->update = int_sha512_update;
    md->finish = int_sha512_finish;
    md->free = int_sha512_free;

    md->reset(md);
}