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/* $FreeBSD$ */
/* $OpenBSD: sign.c,v 1.3 1999/10/04 21:46:29 espie Exp $ */
/*-
* Copyright (c) 1999 Marc Espie.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Marc Espie for the OpenBSD
* Project.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT 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 OPENBSD
* PROJECT 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.
*/
#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <pwd.h>
#include <assert.h>
#include "stand.h"
#include "pgp.h"
#include "gzip.h"
#include "extern.h"
#define COPY_TEMPLATE "%s.sign"
static int
embed_signature_FILE(orig, dest, sign, filename)
/*@temp@*/FILE *orig;
/*@temp@*/FILE *dest;
struct signature *sign;
const char *filename;
{
struct mygzip_header h;
int c;
if (gzip_read_header(orig, &h, NULL) == GZIP_NOT_GZIP)
return 0;
if (gzip_write_header(dest, &h, sign) == 0)
return 0;
while ((c = fgetc(orig)) != EOF && fputc(c, dest) != EOF)
;
if (ferror(dest) != 0)
return 0;
return 1;
}
static int
embed_signature(filename, copy, sign)
const char *filename;
const char *copy;
struct signature *sign;
{
FILE *orig, *dest;
int success;
success = 0;
orig= fopen(filename, "r");
if (orig) {
dest = fopen(copy, "w");
if (dest) {
success = embed_signature_FILE(orig, dest, sign, filename);
if (fclose(dest) != 0)
success = 0;
}
if (fclose(orig) != 0)
success = 0;
}
return success;
}
int
sign(filename, type, userid, envp)
const char *filename;
const char *userid;
int type;
char *envp[];
{
char *copy;
int result;
struct signature *sign;
int success;
switch(type) {
case TAG_PGP:
success = retrieve_pgp_signature(filename, &sign, userid, envp);
break;
case TAG_SHA1:
success = retrieve_sha1_marker(filename, &sign, userid);
break;
case TAG_X509:
success = retrieve_x509_marker(filename, &sign, userid);
break;
}
if (!success) {
fprintf(stderr, "Problem signing %s\n", filename);
free_signature(sign);
return 0;
}
copy = malloc(strlen(filename)+sizeof(COPY_TEMPLATE));
if (copy == NULL) {
fprintf(stderr, "Can't allocate memory\n");
free_signature(sign);
return 0;
}
sprintf(copy, COPY_TEMPLATE, filename);
result = embed_signature(filename, copy, sign);
if (result == 0) {
fprintf(stderr, "Can't embed signature in %s\n", filename);
} else if (unlink(filename) != 0) {
fprintf(stderr, "Can't unlink original %s\n", filename);
result = 0;
} else if (rename(copy, filename) != 0) {
fprintf(stderr, "Can't rename new file %s\n", copy);
result = 0;
}
free(copy);
free_signature(sign);
return result;
}
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