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/*
* px.h
* Header file for pgcrypto.
*
* 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.
*
* $PostgreSQL: pgsql/contrib/pgcrypto/px.h,v 1.9 2003/11/29 22:39:28 pgsql Exp $
*/
#ifndef __PX_H
#define __PX_H
#include <sys/types.h>
#include <sys/param.h>
#ifdef HAVE_ENDIAN_H
#include <endian.h>
#endif
#ifndef BYTE_ORDER
#error BYTE_ORDER must be defined as LITTLE_ENDIAN or BIG_ENDIAN
#endif
#if 1
#define px_alloc(s) palloc(s)
#define px_realloc(p, s) prealloc(p, s)
#define px_free(p) pfree(p)
#else
void *xalloc(size_t s);
void *xrealloc(void *p, size_t s);
void xfree(void *p);
#define px_alloc(s) xalloc(s)
#define px_realloc(p, s) xrealloc(p, s)
#define px_free(p) xfree(p)
#endif
/* max len of 'type' parms */
#define PX_MAX_NAMELEN 128
/* max salt returned */
#define PX_MAX_SALT_LEN 128
typedef struct px_digest PX_MD;
typedef struct px_alias PX_Alias;
typedef struct px_hmac PX_HMAC;
typedef struct px_cipher PX_Cipher;
typedef struct px_combo PX_Combo;
struct px_digest
{
unsigned (*result_size) (PX_MD * h);
unsigned (*block_size) (PX_MD * h);
void (*reset) (PX_MD * h);
void (*update) (PX_MD * h, const uint8 *data, unsigned dlen);
void (*finish) (PX_MD * h, uint8 *dst);
void (*free) (PX_MD * h);
/* private */
union
{
unsigned code;
const void *ptr;
} p;
};
struct px_alias
{
char *alias;
char *name;
};
struct px_hmac
{
unsigned (*result_size) (PX_HMAC * h);
unsigned (*block_size) (PX_HMAC * h);
void (*reset) (PX_HMAC * h);
void (*update) (PX_HMAC * h, const uint8 *data, unsigned dlen);
void (*finish) (PX_HMAC * h, uint8 *dst);
void (*free) (PX_HMAC * h);
void (*init) (PX_HMAC * h, const uint8 *key, unsigned klen);
PX_MD *md;
/* private */
struct
{
uint8 *ipad;
uint8 *opad;
} p;
};
struct px_cipher
{
unsigned (*block_size) (PX_Cipher * c);
unsigned (*key_size) (PX_Cipher * c); /* max key len */
unsigned (*iv_size) (PX_Cipher * c);
int (*init) (PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv);
int (*encrypt) (PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res);
int (*decrypt) (PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res);
void (*free) (PX_Cipher * c);
/* private */
void *ptr;
int pstat; /* mcrypt uses it */
};
struct px_combo
{
int (*init) (PX_Combo * cx, const uint8 *key, unsigned klen,
const uint8 *iv, unsigned ivlen);
int (*encrypt) (PX_Combo * cx, const uint8 *data, unsigned dlen,
uint8 *res, unsigned *rlen);
int (*decrypt) (PX_Combo * cx, const uint8 *data, unsigned dlen,
uint8 *res, unsigned *rlen);
unsigned (*encrypt_len) (PX_Combo * cx, unsigned dlen);
unsigned (*decrypt_len) (PX_Combo * cx, unsigned dlen);
void (*free) (PX_Combo * cx);
PX_Cipher *cipher;
unsigned padding;
};
int px_find_digest(const char *name, PX_MD ** res);
int px_find_hmac(const char *name, PX_HMAC ** res);
int px_find_cipher(const char *name, PX_Cipher ** res);
int px_find_combo(const char *name, PX_Combo ** res);
int px_get_random_bytes(uint8 *dst, unsigned count);
const char *px_resolve_alias(const PX_Alias * aliases, const char *name);
#define px_md_result_size(md) (md)->result_size(md)
#define px_md_block_size(md) (md)->block_size(md)
#define px_md_reset(md) (md)->reset(md)
#define px_md_update(md, data, dlen) (md)->update(md, data, dlen)
#define px_md_finish(md, buf) (md)->finish(md, buf)
#define px_md_free(md) (md)->free(md)
#define px_hmac_result_size(hmac) (hmac)->result_size(hmac)
#define px_hmac_block_size(hmac) (hmac)->block_size(hmac)
#define px_hmac_reset(hmac) (hmac)->reset(hmac)
#define px_hmac_init(hmac, key, klen) (hmac)->init(hmac, key, klen)
#define px_hmac_update(hmac, data, dlen) (hmac)->update(hmac, data, dlen)
#define px_hmac_finish(hmac, buf) (hmac)->finish(hmac, buf)
#define px_hmac_free(hmac) (hmac)->free(hmac)
#define px_cipher_key_size(c) (c)->key_size(c)
#define px_cipher_block_size(c) (c)->block_size(c)
#define px_cipher_iv_size(c) (c)->iv_size(c)
#define px_cipher_init(c, k, klen, iv) (c)->init(c, k, klen, iv)
#define px_cipher_encrypt(c, data, dlen, res) \
(c)->encrypt(c, data, dlen, res)
#define px_cipher_decrypt(c, data, dlen, res) \
(c)->decrypt(c, data, dlen, res)
#define px_cipher_free(c) (c)->free(c)
#define px_combo_encrypt_len(c, dlen) (c)->encrypt_len(c, dlen)
#define px_combo_decrypt_len(c, dlen) (c)->decrypt_len(c, dlen)
#define px_combo_init(c, key, klen, iv, ivlen) \
(c)->init(c, key, klen, iv, ivlen)
#define px_combo_encrypt(c, data, dlen, res, rlen) \
(c)->encrypt(c, data, dlen, res, rlen)
#define px_combo_decrypt(c, data, dlen, res, rlen) \
(c)->decrypt(c, data, dlen, res, rlen)
#define px_combo_free(c) (c)->free(c)
#endif /* __PX_H */
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