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conversion of basic ASCII letters. Remove all uses of strcasecmp and strncasecmp in favor of new functions pg_strcasecmp and pg_strncasecmp; remove most but not all direct uses of toupper and tolower in favor of pg_toupper and pg_tolower. These functions use the same notions of case folding already developed for identifier case conversion. I left the straight locale-based folding in place for situations where we are just manipulating user data and not trying to match it to built-in strings --- for example, the SQL upper() function is still locale dependent. Perhaps this will prove not to be what's wanted, but at the moment we can initdb and pass regression tests in Turkish locale.
357 lines
6.9 KiB
C
357 lines
6.9 KiB
C
/*
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* mhash.c
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* Wrapper for mhash and mcrypt libraries.
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*
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* Copyright (c) 2001 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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* $PostgreSQL: pgsql/contrib/pgcrypto/mhash.c,v 1.10 2004/05/07 00:24:57 tgl Exp $
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*/
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#include <postgres.h>
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#include "px.h"
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#include <mhash.h>
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#include <mcrypt.h>
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#define MAX_KEY_LENGTH 512
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#define MAX_IV_LENGTH 128
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#define DEF_KEY_LEN 16
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/* DIGEST */
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static unsigned
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digest_result_size(PX_MD * h)
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{
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MHASH mh = (MHASH) h->p.ptr;
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hashid id = mhash_get_mhash_algo(mh);
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return mhash_get_block_size(id);
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}
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static unsigned
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digest_block_size(PX_MD * h)
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{
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MHASH mh = (MHASH) h->p.ptr;
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hashid id = mhash_get_mhash_algo(mh);
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return mhash_get_hash_pblock(id);
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}
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static void
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digest_reset(PX_MD * h)
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{
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MHASH mh = (MHASH) h->p.ptr;
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hashid id = mhash_get_mhash_algo(mh);
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uint8 *res = mhash_end(mh);
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mhash_free(res);
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mh = mhash_init(id);
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h->p.ptr = mh;
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}
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static void
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digest_update(PX_MD * h, const uint8 *data, unsigned dlen)
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{
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MHASH mh = (MHASH) h->p.ptr;
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mhash(mh, data, dlen);
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}
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static void
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digest_finish(PX_MD * h, uint8 *dst)
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{
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MHASH mh = (MHASH) h->p.ptr;
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unsigned hlen = digest_result_size(h);
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hashid id = mhash_get_mhash_algo(mh);
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uint8 *buf = mhash_end(mh);
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memcpy(dst, buf, hlen);
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mhash_free(buf);
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mh = mhash_init(id);
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h->p.ptr = mh;
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}
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static void
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digest_free(PX_MD * h)
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{
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MHASH mh = (MHASH) h->p.ptr;
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uint8 *buf = mhash_end(mh);
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mhash_free(buf);
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px_free(h);
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}
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/* ENCRYPT / DECRYPT */
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static unsigned
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cipher_block_size(PX_Cipher * c)
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{
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MCRYPT ctx = (MCRYPT) c->ptr;
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return mcrypt_enc_get_block_size(ctx);
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}
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static unsigned
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cipher_key_size(PX_Cipher * c)
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{
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MCRYPT ctx = (MCRYPT) c->ptr;
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return mcrypt_enc_get_key_size(ctx);
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}
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static unsigned
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cipher_iv_size(PX_Cipher * c)
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{
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MCRYPT ctx = (MCRYPT) c->ptr;
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return mcrypt_enc_mode_has_iv(ctx)
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? mcrypt_enc_get_iv_size(ctx) : 0;
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}
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static int
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cipher_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
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{
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int err;
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MCRYPT ctx = (MCRYPT) c->ptr;
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err = mcrypt_generic_init(ctx, (char *) key, klen, (char *) iv);
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if (err < 0)
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ereport(ERROR,
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(errcode(ERRCODE_EXTERNAL_ROUTINE_INVOCATION_EXCEPTION),
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errmsg("mcrypt_generic_init error"),
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errdetail("%s", mcrypt_strerror(err))));
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c->pstat = 1;
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return 0;
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}
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static int
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cipher_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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int err;
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MCRYPT ctx = (MCRYPT) c->ptr;
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memcpy(res, data, dlen);
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err = mcrypt_generic(ctx, res, dlen);
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if (err < 0)
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ereport(ERROR,
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(errcode(ERRCODE_EXTERNAL_ROUTINE_INVOCATION_EXCEPTION),
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errmsg("mcrypt_generic error"),
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errdetail("%s", mcrypt_strerror(err))));
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return 0;
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}
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static int
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cipher_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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int err;
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MCRYPT ctx = (MCRYPT) c->ptr;
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memcpy(res, data, dlen);
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err = mdecrypt_generic(ctx, res, dlen);
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if (err < 0)
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ereport(ERROR,
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(errcode(ERRCODE_EXTERNAL_ROUTINE_INVOCATION_EXCEPTION),
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errmsg("mdecrypt_generic error"),
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errdetail("%s", mcrypt_strerror(err))));
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return 0;
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}
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static void
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cipher_free(PX_Cipher * c)
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{
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MCRYPT ctx = (MCRYPT) c->ptr;
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if (c->pstat)
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mcrypt_generic_end(ctx);
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else
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mcrypt_module_close(ctx);
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px_free(c);
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}
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/* Helper functions */
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static int
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find_hashid(const char *name)
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{
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int res = -1;
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size_t hnum,
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b,
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i;
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char *mname;
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hnum = mhash_count();
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for (i = 0; i <= hnum; i++)
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{
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mname = mhash_get_hash_name(i);
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if (mname == NULL)
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continue;
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b = pg_strcasecmp(name, mname);
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free(mname);
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if (b == 0)
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{
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res = i;
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break;
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}
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}
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return res;
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}
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static char *modes[] = {
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"ecb", "cbc", "cfb", "ofb", "nofb", "stream",
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"ofb64", "cfb64", NULL
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};
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static PX_Alias aliases[] = {
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{"bf", "blowfish"},
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{"3des", "tripledes"},
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{"des3", "tripledes"},
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{"aes", "rijndael-128"},
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{"rijndael", "rijndael-128"},
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{"aes-128", "rijndael-128"},
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{"aes-192", "rijndael-192"},
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{"aes-256", "rijndael-256"},
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{NULL, NULL}
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};
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static PX_Alias mode_aliases[] = {
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#if 0 /* N/A */
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{"cfb", "ncfb"},
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{"ofb", "nofb"},
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{"cfb64", "ncfb"},
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#endif
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/* { "ofb64", "nofb" }, not sure it works */
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{"cfb8", "cfb"},
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{"ofb8", "ofb"},
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{NULL, NULL}
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};
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static int
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is_mode(char *s)
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{
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char **p;
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if (*s >= '0' && *s <= '9')
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return 0;
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for (p = modes; *p; p++)
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if (!strcmp(s, *p))
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return 1;
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return 0;
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}
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/* PUBLIC FUNCTIONS */
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int
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px_find_digest(const char *name, PX_MD ** res)
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{
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PX_MD *h;
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MHASH mh;
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int i;
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i = find_hashid(name);
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if (i < 0)
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return -1;
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mh = mhash_init(i);
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h = px_alloc(sizeof(*h));
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h->p.ptr = (void *) mh;
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h->result_size = digest_result_size;
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h->block_size = digest_block_size;
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h->reset = digest_reset;
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h->update = digest_update;
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h->finish = digest_finish;
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h->free = digest_free;
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*res = h;
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return 0;
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}
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int
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px_find_cipher(const char *name, PX_Cipher ** res)
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{
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char nbuf[PX_MAX_NAMELEN + 1];
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const char *mode = NULL;
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char *p;
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MCRYPT ctx;
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PX_Cipher *c;
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StrNCpy(nbuf, name, sizeof(nbuf));
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if ((p = strrchr(nbuf, '-')) != NULL)
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{
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if (is_mode(p + 1))
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{
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mode = p + 1;
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*p = 0;
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}
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}
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name = px_resolve_alias(aliases, nbuf);
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if (!mode)
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{
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mode = "cbc";
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/*
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* if (mcrypt_module_is_block_algorithm(name, NULL)) mode = "cbc";
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* else mode = "stream";
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*/
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}
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mode = px_resolve_alias(mode_aliases, mode);
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ctx = mcrypt_module_open((char *) name, NULL, (char *) mode, NULL);
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if (ctx == (void *) MCRYPT_FAILED)
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return -1;
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c = palloc(sizeof *c);
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c->iv_size = cipher_iv_size;
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c->key_size = cipher_key_size;
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c->block_size = cipher_block_size;
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c->init = cipher_init;
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c->encrypt = cipher_encrypt;
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c->decrypt = cipher_decrypt;
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c->free = cipher_free;
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c->ptr = ctx;
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c->pstat = 0;
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*res = c;
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return 0;
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}
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