postgresql/contrib/pgcrypto/pgp.c
Peter Eisentraut 10a3b165a3 pgcrypto: Make header files stand alone
pgp.h used to require including mbuf.h and px.h first.  Include those in
pgp.h, so that it can be used without prerequisites.  Remove mbuf.h
inclusions in .c files where mbuf.h features are not used
directly.  (px.h was always used.)
2014-01-09 06:44:24 -05:00

360 lines
7.2 KiB
C

/*
* pgp.c
* Various utility stuff.
*
* Copyright (c) 2005 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/pgp.c
*/
#include "postgres.h"
#include "px.h"
#include "pgp.h"
/*
* Defaults.
*/
static int def_cipher_algo = PGP_SYM_AES_128;
static int def_s2k_cipher_algo = -1;
static int def_s2k_mode = PGP_S2K_ISALTED;
static int def_s2k_digest_algo = PGP_DIGEST_SHA1;
static int def_compress_algo = PGP_COMPR_NONE;
static int def_compress_level = 6;
static int def_disable_mdc = 0;
static int def_use_sess_key = 0;
static int def_text_mode = 0;
static int def_unicode_mode = 0;
static int def_convert_crlf = 0;
struct digest_info
{
const char *name;
int code;
const char *int_name;
};
struct cipher_info
{
const char *name;
int code;
const char *int_name;
int key_len;
int block_len;
};
static const struct digest_info digest_list[] = {
{"md5", PGP_DIGEST_MD5},
{"sha1", PGP_DIGEST_SHA1},
{"sha-1", PGP_DIGEST_SHA1},
{"ripemd160", PGP_DIGEST_RIPEMD160},
{"sha256", PGP_DIGEST_SHA256},
{"sha384", PGP_DIGEST_SHA384},
{"sha512", PGP_DIGEST_SHA512},
{NULL, 0}
};
static const struct cipher_info cipher_list[] = {
{"3des", PGP_SYM_DES3, "3des-ecb", 192 / 8, 64 / 8},
{"cast5", PGP_SYM_CAST5, "cast5-ecb", 128 / 8, 64 / 8},
{"bf", PGP_SYM_BLOWFISH, "bf-ecb", 128 / 8, 64 / 8},
{"blowfish", PGP_SYM_BLOWFISH, "bf-ecb", 128 / 8, 64 / 8},
{"aes", PGP_SYM_AES_128, "aes-ecb", 128 / 8, 128 / 8},
{"aes128", PGP_SYM_AES_128, "aes-ecb", 128 / 8, 128 / 8},
{"aes192", PGP_SYM_AES_192, "aes-ecb", 192 / 8, 128 / 8},
{"aes256", PGP_SYM_AES_256, "aes-ecb", 256 / 8, 128 / 8},
{"twofish", PGP_SYM_TWOFISH, "twofish-ecb", 256 / 8, 128 / 8},
{NULL, 0, NULL}
};
static const struct cipher_info *
get_cipher_info(int code)
{
const struct cipher_info *i;
for (i = cipher_list; i->name; i++)
if (i->code == code)
return i;
return NULL;
}
int
pgp_get_digest_code(const char *name)
{
const struct digest_info *i;
for (i = digest_list; i->name; i++)
if (pg_strcasecmp(i->name, name) == 0)
return i->code;
return PXE_PGP_UNSUPPORTED_HASH;
}
int
pgp_get_cipher_code(const char *name)
{
const struct cipher_info *i;
for (i = cipher_list; i->name; i++)
if (pg_strcasecmp(i->name, name) == 0)
return i->code;
return PXE_PGP_UNSUPPORTED_CIPHER;
}
const char *
pgp_get_digest_name(int code)
{
const struct digest_info *i;
for (i = digest_list; i->name; i++)
if (i->code == code)
return i->name;
return NULL;
}
const char *
pgp_get_cipher_name(int code)
{
const struct cipher_info *i = get_cipher_info(code);
if (i != NULL)
return i->name;
return NULL;
}
int
pgp_get_cipher_key_size(int code)
{
const struct cipher_info *i = get_cipher_info(code);
if (i != NULL)
return i->key_len;
return 0;
}
int
pgp_get_cipher_block_size(int code)
{
const struct cipher_info *i = get_cipher_info(code);
if (i != NULL)
return i->block_len;
return 0;
}
int
pgp_load_cipher(int code, PX_Cipher **res)
{
int err;
const struct cipher_info *i = get_cipher_info(code);
if (i == NULL)
return PXE_PGP_CORRUPT_DATA;
err = px_find_cipher(i->int_name, res);
if (err == 0)
return 0;
return PXE_PGP_UNSUPPORTED_CIPHER;
}
int
pgp_load_digest(int code, PX_MD **res)
{
int err;
const char *name = pgp_get_digest_name(code);
if (name == NULL)
return PXE_PGP_CORRUPT_DATA;
err = px_find_digest(name, res);
if (err == 0)
return 0;
return PXE_PGP_UNSUPPORTED_HASH;
}
int
pgp_init(PGP_Context **ctx_p)
{
PGP_Context *ctx;
ctx = px_alloc(sizeof *ctx);
memset(ctx, 0, sizeof *ctx);
ctx->cipher_algo = def_cipher_algo;
ctx->s2k_cipher_algo = def_s2k_cipher_algo;
ctx->s2k_mode = def_s2k_mode;
ctx->s2k_digest_algo = def_s2k_digest_algo;
ctx->compress_algo = def_compress_algo;
ctx->compress_level = def_compress_level;
ctx->disable_mdc = def_disable_mdc;
ctx->use_sess_key = def_use_sess_key;
ctx->unicode_mode = def_unicode_mode;
ctx->convert_crlf = def_convert_crlf;
ctx->text_mode = def_text_mode;
*ctx_p = ctx;
return 0;
}
int
pgp_free(PGP_Context *ctx)
{
if (ctx->pub_key)
pgp_key_free(ctx->pub_key);
memset(ctx, 0, sizeof *ctx);
px_free(ctx);
return 0;
}
int
pgp_disable_mdc(PGP_Context *ctx, int disable)
{
ctx->disable_mdc = disable ? 1 : 0;
return 0;
}
int
pgp_set_sess_key(PGP_Context *ctx, int use)
{
ctx->use_sess_key = use ? 1 : 0;
return 0;
}
int
pgp_set_convert_crlf(PGP_Context *ctx, int doit)
{
ctx->convert_crlf = doit ? 1 : 0;
return 0;
}
int
pgp_set_s2k_mode(PGP_Context *ctx, int mode)
{
int err = PXE_OK;
switch (mode)
{
case PGP_S2K_SIMPLE:
case PGP_S2K_SALTED:
case PGP_S2K_ISALTED:
ctx->s2k_mode = mode;
break;
default:
err = PXE_ARGUMENT_ERROR;
break;
}
return err;
}
int
pgp_set_compress_algo(PGP_Context *ctx, int algo)
{
switch (algo)
{
case PGP_COMPR_NONE:
case PGP_COMPR_ZIP:
case PGP_COMPR_ZLIB:
case PGP_COMPR_BZIP2:
ctx->compress_algo = algo;
return 0;
}
return PXE_ARGUMENT_ERROR;
}
int
pgp_set_compress_level(PGP_Context *ctx, int level)
{
if (level >= 0 && level <= 9)
{
ctx->compress_level = level;
return 0;
}
return PXE_ARGUMENT_ERROR;
}
int
pgp_set_text_mode(PGP_Context *ctx, int mode)
{
ctx->text_mode = mode;
return 0;
}
int
pgp_set_cipher_algo(PGP_Context *ctx, const char *name)
{
int code = pgp_get_cipher_code(name);
if (code < 0)
return code;
ctx->cipher_algo = code;
return 0;
}
int
pgp_set_s2k_cipher_algo(PGP_Context *ctx, const char *name)
{
int code = pgp_get_cipher_code(name);
if (code < 0)
return code;
ctx->s2k_cipher_algo = code;
return 0;
}
int
pgp_set_s2k_digest_algo(PGP_Context *ctx, const char *name)
{
int code = pgp_get_digest_code(name);
if (code < 0)
return code;
ctx->s2k_digest_algo = code;
return 0;
}
int
pgp_get_unicode_mode(PGP_Context *ctx)
{
return ctx->unicode_mode;
}
int
pgp_set_unicode_mode(PGP_Context *ctx, int mode)
{
ctx->unicode_mode = mode ? 1 : 0;
return 0;
}
int
pgp_set_symkey(PGP_Context *ctx, const uint8 *key, int len)
{
if (key == NULL || len < 1)
return PXE_ARGUMENT_ERROR;
ctx->sym_key = key;
ctx->sym_key_len = len;
return 0;
}