Hi,
Added sha1sum(1) based on nsz's stripped down version
of libtomcrypt from http://port70.net/~nsz/crypt/.
Thanks,
stateless
>From a1714a24098fe363fc244f28e07ab0cd0814de2e Mon Sep 17 00:00:00 2001
From: stateless <statel...@archlinux.us>
Date: Thu, 4 Jul 2013 12:14:14 +0100
Subject: [PATCH] Add sha1sum
No support for -c at the moment.
---
Makefile | 4 +-
sha1.h | 18 ++++++++
sha1sum.1 | 8 ++++
sha1sum.c | 67 ++++++++++++++++++++++++++++++
util/sha1.c | 134 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 230 insertions(+), 1 deletion(-)
create mode 100644 sha1.h
create mode 100644 sha1sum.1
create mode 100644 sha1sum.c
create mode 100644 util/sha1.c
diff --git a/Makefile b/Makefile
index a54f902..f825ec4 100644
--- a/Makefile
+++ b/Makefile
@@ -18,7 +18,8 @@ LIB = \
util/md5.o \
util/putword.o \
util/recurse.o \
- util/rm.o
+ util/rm.o \
+ util/sha1.o
SRC = \
basename.c \
@@ -76,6 +77,7 @@ SRC = \
uniq.c \
unlink.c \
seq.c \
+ sha1sum.c \
wc.c \
who.c \
yes.c
diff --git a/sha1.h b/sha1.h
new file mode 100644
index 0000000..e11f49e
--- /dev/null
+++ b/sha1.h
@@ -0,0 +1,18 @@
+/* public domain sha1 implementation based on rfc3174 and libtomcrypt */
+
+struct sha1 {
+ uint64_t len; /* processed message length */
+ uint32_t h[5]; /* hash state */
+ uint8_t buf[64]; /* message block buffer */
+};
+
+enum { SHA1_DIGEST_LENGTH = 20 };
+
+/* reset state */
+void sha1_init(struct sha1 *s);
+/* process message */
+void sha1_update(struct sha1 *s, const void *m, unsigned long len);
+/* get message digest */
+/* state is ruined after sum, keep a copy if multiple sum is needed */
+/* part of the message might be left in s, zero it if secrecy is needed */
+void sha1_sum(struct sha1 *s, uint8_t md[SHA1_DIGEST_LENGTH]);
diff --git a/sha1sum.1 b/sha1sum.1
new file mode 100644
index 0000000..10ac3c5
--- /dev/null
+++ b/sha1sum.1
@@ -0,0 +1,8 @@
+.TH SHA1SUM 1 sbase\-VERSION
+.SH NAME
+sha1sum \- compute SHA1 message digest
+.SH SYNOPSIS
+.B sha1sum
+.RI [ file ...]
+.SH DESCRIPTION
+Print SH1 (160-bit) checksums. With no file, read standard input.
diff --git a/sha1sum.c b/sha1sum.c
new file mode 100644
index 0000000..e38346a
--- /dev/null
+++ b/sha1sum.c
@@ -0,0 +1,67 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "util.h"
+#include "sha1.h"
+
+static void sha1sum(int fd, const char *f);
+
+static void
+usage(void)
+{
+ eprintf("usage: %s [file...]\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+ int fd;
+
+ ARGBEGIN {
+ default:
+ usage();
+ } ARGEND;
+
+ if (argc == 0) {
+ sha1sum(STDIN_FILENO, "<stdin>");
+ } else {
+ for (; argc > 0; argc--) {
+ if ((fd = open(*argv, O_RDONLY)) < 0)
+ eprintf("open %s:", *argv);
+ sha1sum(fd, *argv);
+ close(fd);
+ argv++;
+ }
+ }
+
+ return 0;
+}
+
+static void
+sha1sum(int fd, const char *f)
+{
+ unsigned char buf[BUFSIZ];
+ unsigned char digest[SHA1_DIGEST_LENGTH];
+ struct sha1 s;
+ ssize_t n;
+ int i;
+
+ sha1_init(&s);
+ while ((n = read(fd, buf, sizeof buf)) > 0)
+ sha1_update(&s, buf, n);
+ if (n < 0) {
+ eprintf("%s: read error:", f);
+ return;
+ }
+
+ sha1_sum(&s, digest);
+
+ for (i = 0; i < sizeof(digest); i++)
+ printf("%02x", digest[i]);
+ printf(" %s\n", f);
+}
diff --git a/util/sha1.c b/util/sha1.c
new file mode 100644
index 0000000..f828395
--- /dev/null
+++ b/util/sha1.c
@@ -0,0 +1,134 @@
+/* public domain sha1 implementation based on rfc3174 and libtomcrypt */
+#include <stdint.h>
+#include <string.h>
+#include "../sha1.h"
+
+static uint32_t rol(uint32_t n, int k) { return (n << k) | (n >> (32-k)); }
+#define F0(b,c,d) (d ^ (b & (c ^ d)))
+#define F1(b,c,d) (b ^ c ^ d)
+#define F2(b,c,d) ((b & c) | (d & (b | c)))
+#define F3(b,c,d) (b ^ c ^ d)
+#define G0(a,b,c,d,e,i) e += rol(a,5)+F0(b,c,d)+W[i]+0x5A827999; b = rol(b,30)
+#define G1(a,b,c,d,e,i) e += rol(a,5)+F1(b,c,d)+W[i]+0x6ED9EBA1; b = rol(b,30)
+#define G2(a,b,c,d,e,i) e += rol(a,5)+F2(b,c,d)+W[i]+0x8F1BBCDC; b = rol(b,30)
+#define G3(a,b,c,d,e,i) e += rol(a,5)+F3(b,c,d)+W[i]+0xCA62C1D6; b = rol(b,30)
+
+static void processblock(struct sha1 *s, const uint8_t *buf)
+{
+ uint32_t W[80], a, b, c, d, e;
+ int i;
+
+ for (i = 0; i < 16; i++) {
+ W[i] = (uint32_t)buf[4*i]<<24;
+ W[i] |= (uint32_t)buf[4*i+1]<<16;
+ W[i] |= (uint32_t)buf[4*i+2]<<8;
+ W[i] |= buf[4*i+3];
+ }
+ for (; i < 80; i++)
+ W[i] = rol(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);
+ a = s->h[0];
+ b = s->h[1];
+ c = s->h[2];
+ d = s->h[3];
+ e = s->h[4];
+ for (i = 0; i < 20; ) {
+ G0(a,b,c,d,e,i++);
+ G0(e,a,b,c,d,i++);
+ G0(d,e,a,b,c,i++);
+ G0(c,d,e,a,b,i++);
+ G0(b,c,d,e,a,i++);
+ }
+ for (; i < 40; ) {
+ G1(a,b,c,d,e,i++);
+ G1(e,a,b,c,d,i++);
+ G1(d,e,a,b,c,i++);
+ G1(c,d,e,a,b,i++);
+ G1(b,c,d,e,a,i++);
+ }
+ for (; i < 60; ) {
+ G2(a,b,c,d,e,i++);
+ G2(e,a,b,c,d,i++);
+ G2(d,e,a,b,c,i++);
+ G2(c,d,e,a,b,i++);
+ G2(b,c,d,e,a,i++);
+ }
+ for (; i < 80; ) {
+ G3(a,b,c,d,e,i++);
+ G3(e,a,b,c,d,i++);
+ G3(d,e,a,b,c,i++);
+ G3(c,d,e,a,b,i++);
+ G3(b,c,d,e,a,i++);
+ }
+ s->h[0] += a;
+ s->h[1] += b;
+ s->h[2] += c;
+ s->h[3] += d;
+ s->h[4] += e;
+}
+
+static void pad(struct sha1 *s)
+{
+ unsigned r = s->len % 64;
+
+ s->buf[r++] = 0x80;
+ if (r > 56) {
+ memset(s->buf + r, 0, 64 - r);
+ r = 0;
+ processblock(s, s->buf);
+ }
+ memset(s->buf + r, 0, 56 - r);
+ s->len *= 8;
+ s->buf[56] = s->len >> 56;
+ s->buf[57] = s->len >> 48;
+ s->buf[58] = s->len >> 40;
+ s->buf[59] = s->len >> 32;
+ s->buf[60] = s->len >> 24;
+ s->buf[61] = s->len >> 16;
+ s->buf[62] = s->len >> 8;
+ s->buf[63] = s->len;
+ processblock(s, s->buf);
+}
+
+void sha1_init(struct sha1 *s)
+{
+ s->len = 0;
+ s->h[0] = 0x67452301;
+ s->h[1] = 0xEFCDAB89;
+ s->h[2] = 0x98BADCFE;
+ s->h[3] = 0x10325476;
+ s->h[4] = 0xC3D2E1F0;
+}
+
+void sha1_sum(struct sha1 *s, uint8_t md[20])
+{
+ int i;
+
+ pad(s);
+ for (i = 0; i < 5; i++) {
+ md[4*i] = s->h[i] >> 24;
+ md[4*i+1] = s->h[i] >> 16;
+ md[4*i+2] = s->h[i] >> 8;
+ md[4*i+3] = s->h[i];
+ }
+}
+
+void sha1_update(struct sha1 *s, const void *m, unsigned long len)
+{
+ const uint8_t *p = m;
+ unsigned r = s->len % 64;
+
+ s->len += len;
+ if (r) {
+ if (len < 64 - r) {
+ memcpy(s->buf + r, p, len);
+ return;
+ }
+ memcpy(s->buf + r, p, 64 - r);
+ len -= 64 - r;
+ p += 64 - r;
+ processblock(s, s->buf);
+ }
+ for (; len >= 64; len -= 64, p += 64)
+ processblock(s, p);
+ memcpy(s->buf, p, len);
+}
--
1.8.3.2
