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151 lines
4.0 KiB
C
151 lines
4.0 KiB
C
/* $OpenBSD: sign.c,v 1.3 1999/10/04 21:46:29 espie Exp $ */
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/*-
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* Copyright (c) 1999 Marc Espie.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Marc Espie for the OpenBSD
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* Project.
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*
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* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
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* PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <signal.h>
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#include <pwd.h>
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#include <assert.h>
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#include "stand.h"
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#include "pgp.h"
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#include "gzip.h"
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#include "extern.h"
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#define COPY_TEMPLATE "%s.sign"
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static int
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embed_signature_FILE(orig, dest, sign, filename)
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/*@temp@*/FILE *orig;
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/*@temp@*/FILE *dest;
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struct signature *sign;
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const char *filename;
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{
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struct mygzip_header h;
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int c;
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if (gzip_read_header(orig, &h, NULL) == GZIP_NOT_GZIP)
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return 0;
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if (gzip_write_header(dest, &h, sign) == 0)
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return 0;
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while ((c = fgetc(orig)) != EOF && fputc(c, dest) != EOF)
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;
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if (ferror(dest) != 0)
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return 0;
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return 1;
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}
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static int
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embed_signature(filename, copy, sign)
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const char *filename;
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const char *copy;
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struct signature *sign;
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{
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FILE *orig, *dest;
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int success;
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success = 0;
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orig= fopen(filename, "r");
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if (orig) {
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dest = fopen(copy, "w");
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if (dest) {
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success = embed_signature_FILE(orig, dest, sign, filename);
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if (fclose(dest) != 0)
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success = 0;
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}
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if (fclose(orig) != 0)
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success = 0;
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}
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return success;
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}
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int
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sign(filename, type, userid, envp)
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const char *filename;
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const char *userid;
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int type;
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char *envp[];
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{
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char *copy;
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int result;
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struct signature *sign;
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int success;
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sign = NULL;
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switch(type) {
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case TAG_PGP:
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success = retrieve_pgp_signature(filename, &sign, userid, envp);
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break;
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case TAG_SHA1:
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success = retrieve_sha1_marker(filename, &sign, userid);
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break;
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case TAG_X509:
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success = retrieve_x509_marker(filename, &sign, userid);
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break;
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default:
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success = 0;
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fprintf(stderr, "Unknown type %d\n", type);
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}
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if (!success) {
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fprintf(stderr, "Problem signing %s\n", filename);
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free_signature(sign);
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return 0;
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}
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copy = malloc(strlen(filename)+sizeof(COPY_TEMPLATE));
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if (copy == NULL) {
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fprintf(stderr, "Can't allocate memory\n");
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free_signature(sign);
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return 0;
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}
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sprintf(copy, COPY_TEMPLATE, filename);
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result = embed_signature(filename, copy, sign);
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if (result == 0) {
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fprintf(stderr, "Can't embed signature in %s\n", filename);
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} else if (unlink(filename) != 0) {
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fprintf(stderr, "Can't unlink original %s\n", filename);
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result = 0;
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} else if (rename(copy, filename) != 0) {
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fprintf(stderr, "Can't rename new file %s\n", copy);
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result = 0;
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}
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free(copy);
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free_signature(sign);
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return result;
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}
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