mirror of
https://github.com/postgres/postgres.git
synced 2025-10-31 10:30:33 +03:00
04e15c69d2
This was not changed in HEAD, but will be done later as part of a pgindent run. Future pgindent runs will also do this. Report by Tom Lane Backpatch through all supported branches, but not HEAD
144 lines
3.2 KiB
C
144 lines
3.2 KiB
C
/*
|
|
* pgp-mpi.c
|
|
* OpenPGP MPI helper functions.
|
|
*
|
|
* 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-mpi.c
|
|
*/
|
|
#include "postgres.h"
|
|
|
|
#include "px.h"
|
|
#include "mbuf.h"
|
|
#include "pgp.h"
|
|
|
|
int
|
|
pgp_mpi_alloc(int bits, PGP_MPI **mpi)
|
|
{
|
|
PGP_MPI *n;
|
|
int len = (bits + 7) / 8;
|
|
|
|
if (bits < 0 || bits > 0xFFFF)
|
|
{
|
|
px_debug("pgp_mpi_alloc: unreasonable request: bits=%d", bits);
|
|
return PXE_PGP_CORRUPT_DATA;
|
|
}
|
|
n = px_alloc(sizeof(*n) + len);
|
|
n->bits = bits;
|
|
n->bytes = len;
|
|
n->data = (uint8 *) (n) + sizeof(*n);
|
|
*mpi = n;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
pgp_mpi_create(uint8 *data, int bits, PGP_MPI **mpi)
|
|
{
|
|
int res;
|
|
PGP_MPI *n;
|
|
|
|
res = pgp_mpi_alloc(bits, &n);
|
|
if (res < 0)
|
|
return res;
|
|
memcpy(n->data, data, n->bytes);
|
|
*mpi = n;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
pgp_mpi_free(PGP_MPI *mpi)
|
|
{
|
|
if (mpi == NULL)
|
|
return 0;
|
|
px_memset(mpi, 0, sizeof(*mpi) + mpi->bytes);
|
|
px_free(mpi);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
pgp_mpi_read(PullFilter *src, PGP_MPI **mpi)
|
|
{
|
|
int res;
|
|
uint8 hdr[2];
|
|
int bits;
|
|
PGP_MPI *n;
|
|
|
|
res = pullf_read_fixed(src, 2, hdr);
|
|
if (res < 0)
|
|
return res;
|
|
bits = ((unsigned) hdr[0] << 8) + hdr[1];
|
|
|
|
res = pgp_mpi_alloc(bits, &n);
|
|
if (res < 0)
|
|
return res;
|
|
|
|
res = pullf_read_fixed(src, n->bytes, n->data);
|
|
if (res < 0)
|
|
pgp_mpi_free(n);
|
|
else
|
|
*mpi = n;
|
|
return res;
|
|
}
|
|
|
|
int
|
|
pgp_mpi_write(PushFilter *dst, PGP_MPI *n)
|
|
{
|
|
int res;
|
|
uint8 buf[2];
|
|
|
|
buf[0] = n->bits >> 8;
|
|
buf[1] = n->bits & 0xFF;
|
|
res = pushf_write(dst, buf, 2);
|
|
if (res >= 0)
|
|
res = pushf_write(dst, n->data, n->bytes);
|
|
return res;
|
|
}
|
|
|
|
int
|
|
pgp_mpi_hash(PX_MD *md, PGP_MPI *n)
|
|
{
|
|
uint8 buf[2];
|
|
|
|
buf[0] = n->bits >> 8;
|
|
buf[1] = n->bits & 0xFF;
|
|
px_md_update(md, buf, 2);
|
|
px_md_update(md, n->data, n->bytes);
|
|
|
|
return 0;
|
|
}
|
|
|
|
unsigned
|
|
pgp_mpi_cksum(unsigned cksum, PGP_MPI *n)
|
|
{
|
|
int i;
|
|
|
|
cksum += n->bits >> 8;
|
|
cksum += n->bits & 0xFF;
|
|
for (i = 0; i < n->bytes; i++)
|
|
cksum += n->data[i];
|
|
|
|
return cksum & 0xFFFF;
|
|
}
|