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0a78320057
This includes removing tabs after periods in C comments, which was applied to back branches, so this change should not effect backpatching.
360 lines
7.3 KiB
C
360 lines
7.3 KiB
C
/*
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* pgp.c
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* Various utility stuff.
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*
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* Copyright (c) 2005 Marko Kreen
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* contrib/pgcrypto/pgp.c
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*/
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#include "postgres.h"
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#include "px.h"
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#include "pgp.h"
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/*
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* Defaults.
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*/
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static int def_cipher_algo = PGP_SYM_AES_128;
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static int def_s2k_cipher_algo = -1;
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static int def_s2k_mode = PGP_S2K_ISALTED;
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static int def_s2k_digest_algo = PGP_DIGEST_SHA1;
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static int def_compress_algo = PGP_COMPR_NONE;
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static int def_compress_level = 6;
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static int def_disable_mdc = 0;
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static int def_use_sess_key = 0;
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static int def_text_mode = 0;
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static int def_unicode_mode = 0;
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static int def_convert_crlf = 0;
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struct digest_info
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{
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const char *name;
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int code;
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const char *int_name;
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};
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struct cipher_info
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{
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const char *name;
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int code;
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const char *int_name;
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int key_len;
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int block_len;
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};
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static const struct digest_info digest_list[] = {
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{"md5", PGP_DIGEST_MD5},
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{"sha1", PGP_DIGEST_SHA1},
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{"sha-1", PGP_DIGEST_SHA1},
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{"ripemd160", PGP_DIGEST_RIPEMD160},
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{"sha256", PGP_DIGEST_SHA256},
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{"sha384", PGP_DIGEST_SHA384},
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{"sha512", PGP_DIGEST_SHA512},
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{NULL, 0}
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};
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static const struct cipher_info cipher_list[] = {
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{"3des", PGP_SYM_DES3, "3des-ecb", 192 / 8, 64 / 8},
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{"cast5", PGP_SYM_CAST5, "cast5-ecb", 128 / 8, 64 / 8},
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{"bf", PGP_SYM_BLOWFISH, "bf-ecb", 128 / 8, 64 / 8},
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{"blowfish", PGP_SYM_BLOWFISH, "bf-ecb", 128 / 8, 64 / 8},
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{"aes", PGP_SYM_AES_128, "aes-ecb", 128 / 8, 128 / 8},
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{"aes128", PGP_SYM_AES_128, "aes-ecb", 128 / 8, 128 / 8},
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{"aes192", PGP_SYM_AES_192, "aes-ecb", 192 / 8, 128 / 8},
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{"aes256", PGP_SYM_AES_256, "aes-ecb", 256 / 8, 128 / 8},
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{"twofish", PGP_SYM_TWOFISH, "twofish-ecb", 256 / 8, 128 / 8},
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{NULL, 0, NULL}
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};
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static const struct cipher_info *
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get_cipher_info(int code)
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{
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const struct cipher_info *i;
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for (i = cipher_list; i->name; i++)
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if (i->code == code)
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return i;
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return NULL;
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}
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int
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pgp_get_digest_code(const char *name)
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{
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const struct digest_info *i;
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for (i = digest_list; i->name; i++)
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if (pg_strcasecmp(i->name, name) == 0)
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return i->code;
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return PXE_PGP_UNSUPPORTED_HASH;
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}
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int
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pgp_get_cipher_code(const char *name)
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{
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const struct cipher_info *i;
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for (i = cipher_list; i->name; i++)
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if (pg_strcasecmp(i->name, name) == 0)
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return i->code;
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return PXE_PGP_UNSUPPORTED_CIPHER;
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}
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const char *
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pgp_get_digest_name(int code)
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{
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const struct digest_info *i;
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for (i = digest_list; i->name; i++)
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if (i->code == code)
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return i->name;
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return NULL;
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}
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const char *
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pgp_get_cipher_name(int code)
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{
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const struct cipher_info *i = get_cipher_info(code);
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if (i != NULL)
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return i->name;
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return NULL;
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}
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int
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pgp_get_cipher_key_size(int code)
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{
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const struct cipher_info *i = get_cipher_info(code);
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if (i != NULL)
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return i->key_len;
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return 0;
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}
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int
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pgp_get_cipher_block_size(int code)
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{
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const struct cipher_info *i = get_cipher_info(code);
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if (i != NULL)
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return i->block_len;
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return 0;
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}
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int
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pgp_load_cipher(int code, PX_Cipher **res)
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{
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int err;
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const struct cipher_info *i = get_cipher_info(code);
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if (i == NULL)
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return PXE_PGP_CORRUPT_DATA;
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err = px_find_cipher(i->int_name, res);
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if (err == 0)
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return 0;
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return PXE_PGP_UNSUPPORTED_CIPHER;
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}
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int
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pgp_load_digest(int code, PX_MD **res)
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{
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int err;
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const char *name = pgp_get_digest_name(code);
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if (name == NULL)
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return PXE_PGP_CORRUPT_DATA;
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err = px_find_digest(name, res);
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if (err == 0)
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return 0;
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return PXE_PGP_UNSUPPORTED_HASH;
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}
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int
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pgp_init(PGP_Context **ctx_p)
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{
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PGP_Context *ctx;
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ctx = px_alloc(sizeof *ctx);
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memset(ctx, 0, sizeof *ctx);
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ctx->cipher_algo = def_cipher_algo;
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ctx->s2k_cipher_algo = def_s2k_cipher_algo;
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ctx->s2k_mode = def_s2k_mode;
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ctx->s2k_digest_algo = def_s2k_digest_algo;
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ctx->compress_algo = def_compress_algo;
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ctx->compress_level = def_compress_level;
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ctx->disable_mdc = def_disable_mdc;
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ctx->use_sess_key = def_use_sess_key;
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ctx->unicode_mode = def_unicode_mode;
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ctx->convert_crlf = def_convert_crlf;
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ctx->text_mode = def_text_mode;
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*ctx_p = ctx;
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return 0;
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}
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int
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pgp_free(PGP_Context *ctx)
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{
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if (ctx->pub_key)
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pgp_key_free(ctx->pub_key);
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px_memset(ctx, 0, sizeof *ctx);
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px_free(ctx);
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return 0;
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}
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int
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pgp_disable_mdc(PGP_Context *ctx, int disable)
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{
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ctx->disable_mdc = disable ? 1 : 0;
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return 0;
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}
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int
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pgp_set_sess_key(PGP_Context *ctx, int use)
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{
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ctx->use_sess_key = use ? 1 : 0;
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return 0;
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}
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int
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pgp_set_convert_crlf(PGP_Context *ctx, int doit)
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{
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ctx->convert_crlf = doit ? 1 : 0;
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return 0;
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}
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int
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pgp_set_s2k_mode(PGP_Context *ctx, int mode)
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{
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int err = PXE_OK;
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switch (mode)
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{
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case PGP_S2K_SIMPLE:
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case PGP_S2K_SALTED:
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case PGP_S2K_ISALTED:
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ctx->s2k_mode = mode;
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break;
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default:
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err = PXE_ARGUMENT_ERROR;
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break;
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}
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return err;
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}
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int
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pgp_set_compress_algo(PGP_Context *ctx, int algo)
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{
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switch (algo)
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{
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case PGP_COMPR_NONE:
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case PGP_COMPR_ZIP:
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case PGP_COMPR_ZLIB:
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case PGP_COMPR_BZIP2:
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ctx->compress_algo = algo;
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return 0;
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}
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return PXE_ARGUMENT_ERROR;
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}
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int
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pgp_set_compress_level(PGP_Context *ctx, int level)
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{
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if (level >= 0 && level <= 9)
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{
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ctx->compress_level = level;
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return 0;
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}
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return PXE_ARGUMENT_ERROR;
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}
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int
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pgp_set_text_mode(PGP_Context *ctx, int mode)
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{
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ctx->text_mode = mode;
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return 0;
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}
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int
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pgp_set_cipher_algo(PGP_Context *ctx, const char *name)
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{
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int code = pgp_get_cipher_code(name);
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if (code < 0)
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return code;
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ctx->cipher_algo = code;
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return 0;
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}
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int
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pgp_set_s2k_cipher_algo(PGP_Context *ctx, const char *name)
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{
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int code = pgp_get_cipher_code(name);
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if (code < 0)
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return code;
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ctx->s2k_cipher_algo = code;
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return 0;
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}
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int
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pgp_set_s2k_digest_algo(PGP_Context *ctx, const char *name)
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{
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int code = pgp_get_digest_code(name);
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if (code < 0)
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return code;
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ctx->s2k_digest_algo = code;
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return 0;
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}
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int
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pgp_get_unicode_mode(PGP_Context *ctx)
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{
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return ctx->unicode_mode;
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}
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int
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pgp_set_unicode_mode(PGP_Context *ctx, int mode)
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{
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ctx->unicode_mode = mode ? 1 : 0;
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return 0;
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}
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int
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pgp_set_symkey(PGP_Context *ctx, const uint8 *key, int len)
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{
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if (key == NULL || len < 1)
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return PXE_ARGUMENT_ERROR;
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ctx->sym_key = key;
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ctx->sym_key_len = len;
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return 0;
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}
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