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104 lines
2.2 KiB
C
104 lines
2.2 KiB
C
/* $NetBSD: sha1hl.c,v 1.8 2011/11/04 23:58:14 cheusov Exp $ */
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/* sha1hl.c
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@login.dkuug.dk> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*/
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/* #include "namespace.h" */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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#include <sys/uio.h>
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#include <assert.h>
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#include <errno.h>
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#include <sha1.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: sha1hl.c,v 1.8 2011/11/04 23:58:14 cheusov Exp $");
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#endif /* LIBC_SCCS and not lint */
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#ifndef _DIAGASSERT
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#define _DIAGASSERT(cond) assert(cond)
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#endif
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/* ARGSUSED */
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char *
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SHA1End(SHA1_CTX *ctx, char *buf)
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{
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int i;
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char *p = buf;
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uint8_t digest[20];
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static const char hex[]="0123456789abcdef";
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_DIAGASSERT(ctx != NULL);
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/* buf may be NULL */
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if (p == NULL && (p = malloc(41)) == NULL)
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return 0;
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SHA1Final(digest,ctx);
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for (i = 0; i < 20; i++) {
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p[i + i] = hex[((uint32_t)digest[i]) >> 4];
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p[i + i + 1] = hex[digest[i] & 0x0f];
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}
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p[i + i] = '\0';
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return(p);
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}
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char *
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SHA1File(char *filename, char *buf)
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{
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uint8_t buffer[BUFSIZ];
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SHA1_CTX ctx;
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int fd, oerrno;
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ssize_t num;
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_DIAGASSERT(filename != NULL);
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/* XXX: buf may be NULL ? */
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SHA1Init(&ctx);
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if ((fd = open(filename,O_RDONLY)) < 0)
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return(0);
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while ((num = read(fd, buffer, sizeof(buffer))) > 0)
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SHA1Update(&ctx, buffer, (size_t)num);
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oerrno = errno;
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close(fd);
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errno = oerrno;
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return(num < 0 ? 0 : SHA1End(&ctx, buf));
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}
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char *
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SHA1Data(const uint8_t *data, size_t len, char *buf)
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{
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SHA1_CTX ctx;
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_DIAGASSERT(data != NULL);
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/* XXX: buf may be NULL ? */
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SHA1Init(&ctx);
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SHA1Update(&ctx, data, len);
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return(SHA1End(&ctx, buf));
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}
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