76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/*-
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* Copyright (c) 2008 Juan Romero Pardines.
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT 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 OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <xbps_api.h>
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static void
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usage(void)
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{
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fprintf(stderr, "usage: xbps-digest <file> <file1+N> ...\n");
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exit(EXIT_FAILURE);
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}
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int
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main(int argc, char **argv)
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{
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SHA256_CTX ctx;
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uint8_t buffer[BUFSIZ * 20], *digest;
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ssize_t bytes;
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int i, fd;
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if (argc < 2)
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usage();
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for (i = 1; i < argc; i++) {
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if ((fd = open(argv[i], O_RDONLY)) == -1) {
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printf("xbps-digest: cannot open %s (%s)\n", argv[i],
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strerror(errno));
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exit(EXIT_FAILURE);
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}
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digest = malloc(SHA256_DIGEST_STRING_LENGTH);
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if (digest == NULL) {
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printf("xbps-digest: malloc failed (%s)\n",
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strerror(errno));
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exit(EXIT_FAILURE);
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}
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SHA256_Init(&ctx);
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while ((bytes = read(fd, buffer, sizeof(buffer))) > 0)
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SHA256_Update(&ctx, buffer, (size_t)bytes);
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printf("%s\n", SHA256_End(&ctx, digest));
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free(digest);
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close(fd);
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}
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exit(EXIT_SUCCESS);
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}
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