[PATCH] Add sha512sum(1)

---
 Makefile      |   6 ++-
 config.mk     |   2 +-
 sha512.h      |  18 +++++++
 sha512sum.1   |   8 +++
 sha512sum.c   |  49 ++++++++++++++++++
 util/sha512.c | 163 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 243 insertions(+), 3 deletions(-)
 create mode 100644 sha512.h
 create mode 100644 sha512sum.1
 create mode 100644 sha512sum.c
 create mode 100644 util/sha512.c
diff --git a/Makefile b/Makefile
index da4d0d0..2e31f33 100644
--- a/Makefile
+++ b/Makefile
_AT_@ -3,7 +3,7 @@ include config.mk
 .POSIX:
 .SUFFIXES: .c .o
 
-HDR = crypt.h fs.h text.h md5.h sha1.h util.h arg.h
+HDR = crypt.h fs.h text.h md5.h sha1.h sha256.h sha512.h util.h arg.h
 LIB = \
 	util/afgets.o    \
 	util/agetcwd.o   \
_AT_@ -21,7 +21,8 @@ LIB = \
 	util/recurse.o   \
 	util/rm.o        \
 	util/sha1.o      \
-	util/sha256.o
+	util/sha256.o    \
+	util/sha512.o
 
 SRC = \
 	basename.c \
_AT_@ -82,6 +83,7 @@ SRC = \
 	seq.c      \
 	sha1sum.c  \
 	sha256sum.c\
+	sha512sum.c\
 	wc.c       \
 	who.c      \
 	yes.c
diff --git a/config.mk b/config.mk
index 5054e8d..a3ffc4d 100644
--- a/config.mk
+++ b/config.mk
_AT_@ -9,7 +9,7 @@ MANPREFIX = $(PREFIX)/share/man
 #CC = musl-gcc
 LD = $(CC)
 CPPFLAGS = -D_BSD_SOURCE -D_GNU_SOURCE
-CFLAGS   = -g -ansi -Wall -pedantic $(CPPFLAGS)
+CFLAGS   = -g -ansi -Wall -Wno-long-long -pedantic $(CPPFLAGS)
 LDFLAGS  = -g
 
 #CC = tcc
diff --git a/sha512.h b/sha512.h
new file mode 100644
index 0000000..c761712
--- /dev/null
+++ b/sha512.h
_AT_@ -0,0 +1,18 @@
+/* public domain sha512 implementation based on fips180-3 */
+
+struct sha512 {
+	uint64_t len;     /* processed message length */
+	uint64_t h[8];    /* hash state */
+	uint8_t buf[128]; /* message block buffer */
+};
+
+enum { SHA512_DIGEST_LENGTH = 64 };
+
+/* reset state */
+void sha512_init(void *ctx);
+/* process message */
+void sha512_update(void *ctx, 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 sha512_sum(void *ctx, uint8_t md[SHA512_DIGEST_LENGTH]);
diff --git a/sha512sum.1 b/sha512sum.1
new file mode 100644
index 0000000..50cdd7e
--- /dev/null
+++ b/sha512sum.1
_AT_@ -0,0 +1,8 @@
+.TH SHA512SUM 1 sbase\-VERSION
+.SH NAME
+sha512sum \- compute SHA512 message digest
+.SH SYNOPSIS
+.B sha512sum
+.RI [ file ...]
+.SH DESCRIPTION
+Print SHA512 (512-bit) checksums. With no file, read standard input.
diff --git a/sha512sum.c b/sha512sum.c
new file mode 100644
index 0000000..972f2c7
--- /dev/null
+++ b/sha512sum.c
_AT_@ -0,0 +1,49 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "util.h"
+#include "crypt.h"
+#include "sha512.h"
+
+struct sha512 s;
+struct crypt_ops sha512_ops = {
+	sha512_init,
+	sha512_update,
+	sha512_sum,
+	&s,
+};
+
+static void
+usage(void)
+{
+	eprintf("usage: %s [file...]\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	FILE *fp;
+	uint8_t md[SHA512_DIGEST_LENGTH];
+
+	ARGBEGIN {
+	default:
+		usage();
+	} ARGEND;
+
+	if (argc == 0) {
+		cryptsum(&sha512_ops, stdin, "<stdin>", md);
+		mdprint(md, "<stdin>", sizeof(md));
+	} else {
+		for (; argc > 0; argc--) {
+			if ((fp = fopen(*argv, "r")) == NULL)
+				eprintf("fopen %s:", *argv);
+			cryptsum(&sha512_ops, fp, *argv, md);
+			mdprint(md, *argv, sizeof(md));
+			fclose(fp);
+			argv++;
+		}
+	}
+
+	return 0;
+}
diff --git a/util/sha512.c b/util/sha512.c
new file mode 100644
index 0000000..dac3118
--- /dev/null
+++ b/util/sha512.c
_AT_@ -0,0 +1,163 @@
+/* public domain sha256 implementation based on fips180-3 */
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include "../sha512.h"
+
+static uint64_t ror(uint64_t n, int k) { return (n >> k) | (n << (64-k)); }
+#define Ch(x,y,z)  (z ^ (x & (y ^ z)))
+#define Maj(x,y,z) ((x & y) | (z & (x | y)))
+#define S0(x)      (ror(x,28) ^ ror(x,34) ^ ror(x,39))
+#define S1(x)      (ror(x,14) ^ ror(x,18) ^ ror(x,41))
+#define R0(x)      (ror(x,1) ^ ror(x,8) ^ (x>>7))
+#define R1(x)      (ror(x,19) ^ ror(x,61) ^ (x>>6))
+
+static const uint64_t K[80] = {
+0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
+0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
+0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
+0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
+0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
+0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
+0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
+0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
+0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
+0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
+0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
+0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
+0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
+0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
+0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
+0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
+0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
+0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
+0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
+0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
+};
+
+static void processblock(struct sha512 *s, const uint8_t *buf)
+{
+	uint64_t W[80], t1, t2, a, b, c, d, e, f, g, h;
+	int i;
+
+	for (i = 0; i < 16; i++) {
+		W[i] = (uint64_t)buf[8*i]<<56;
+		W[i] |= (uint64_t)buf[8*i+1]<<48;
+		W[i] |= (uint64_t)buf[8*i+2]<<40;
+		W[i] |= (uint64_t)buf[8*i+3]<<32;
+		W[i] |= (uint64_t)buf[8*i+4]<<24;
+		W[i] |= (uint64_t)buf[8*i+5]<<16;
+		W[i] |= (uint64_t)buf[8*i+6]<<8;
+		W[i] |= buf[8*i+7];
+	}
+	for (; i < 80; i++)
+		W[i] = R1(W[i-2]) + W[i-7] + R0(W[i-15]) + W[i-16];
+	a = s->h[0];
+	b = s->h[1];
+	c = s->h[2];
+	d = s->h[3];
+	e = s->h[4];
+	f = s->h[5];
+	g = s->h[6];
+	h = s->h[7];
+	for (i = 0; i < 80; i++) {
+		t1 = h + S1(e) + Ch(e,f,g) + K[i] + W[i];
+		t2 = S0(a) + Maj(a,b,c);
+		h = g;
+		g = f;
+		f = e;
+		e = d + t1;
+		d = c;
+		c = b;
+		b = a;
+		a = t1 + t2;
+	}
+	s->h[0] += a;
+	s->h[1] += b;
+	s->h[2] += c;
+	s->h[3] += d;
+	s->h[4] += e;
+	s->h[5] += f;
+	s->h[6] += g;
+	s->h[7] += h;
+}
+
+static void pad(struct sha512 *s)
+{
+	unsigned r = s->len % 128;
+
+	s->buf[r++] = 0x80;
+	if (r > 112) {
+		memset(s->buf + r, 0, 128 - r);
+		r = 0;
+		processblock(s, s->buf);
+	}
+	memset(s->buf + r, 0, 120 - r);
+	s->len *= 8;
+	s->buf[120] = s->len >> 56;
+	s->buf[121] = s->len >> 48;
+	s->buf[122] = s->len >> 40;
+	s->buf[123] = s->len >> 32;
+	s->buf[124] = s->len >> 24;
+	s->buf[125] = s->len >> 16;
+	s->buf[126] = s->len >> 8;
+	s->buf[127] = s->len;
+	processblock(s, s->buf);
+}
+
+void sha512_init(void *ctx)
+{
+	struct sha512 *s = ctx;
+	s->len = 0;
+	s->h[0] = 0x6a09e667f3bcc908ULL;
+	s->h[1] = 0xbb67ae8584caa73bULL;
+	s->h[2] = 0x3c6ef372fe94f82bULL;
+	s->h[3] = 0xa54ff53a5f1d36f1ULL;
+	s->h[4] = 0x510e527fade682d1ULL;
+	s->h[5] = 0x9b05688c2b3e6c1fULL;
+	s->h[6] = 0x1f83d9abfb41bd6bULL;
+	s->h[7] = 0x5be0cd19137e2179ULL;
+}
+
+void sha512_sum(void *ctx, uint8_t md[SHA512_DIGEST_LENGTH])
+{
+	struct sha512 *s = ctx;
+	int i;
+
+	pad(s);
+	for (i = 0; i < 8; i++) {
+		md[8*i] = s->h[i] >> 56;
+		md[8*i+1] = s->h[i] >> 48;
+		md[8*i+2] = s->h[i] >> 40;
+		md[8*i+3] = s->h[i] >> 32;
+		md[8*i+4] = s->h[i] >> 24;
+		md[8*i+5] = s->h[i] >> 16;
+		md[8*i+6] = s->h[i] >> 8;
+		md[8*i+7] = s->h[i];
+	}
+}
+
+void sha512_update(void *ctx, const void *m, unsigned long len)
+{
+	struct sha512 *s = ctx;
+	const uint8_t *p = m;
+	unsigned r = s->len % 128;
+
+	s->len += len;
+	if (r) {
+		if (len < 128 - r) {
+			memcpy(s->buf + r, p, len);
+			return;
+		}
+		memcpy(s->buf + r, p, 128 - r);
+		len -= 128 - r;
+		p += 128 - r;
+		processblock(s, s->buf);
+	}
+	for (; len >= 128; len -= 128, p += 128)
+		processblock(s, p);
+	memcpy(s->buf, p, len);
+}
-- 
1.8.3.3
--3MwIy2ne0vdjdPXF--