aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--toys/lsb/md5sum.c239
-rw-r--r--toys/other/sha1sum.c156
2 files changed, 239 insertions, 156 deletions
diff --git a/toys/lsb/md5sum.c b/toys/lsb/md5sum.c
new file mode 100644
index 00000000..44bafb1f
--- /dev/null
+++ b/toys/lsb/md5sum.c
@@ -0,0 +1,239 @@
+/* vi: set sw=4 ts=4:
+ *
+ * md5sum.c - Calculate RFC 1321 md5 hash and sha1 hash.
+ *
+ * Copyright 2012 Rob Landley <rob@landley.net>
+ *
+ * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/md5sum.html
+ * and http://www.ietf.org/rfc/rfc1321.txt
+ *
+ * They're combined this way to share infrastructure, and because md5sum is
+ * and LSB standard command, sha1sum is just a good idea.
+
+USE_MD5SUM(NEWTOY(md5sum, NULL, TOYFLAG_USR|TOYFLAG_BIN))
+USE_MD5SUM_SHA1SUM(OLDTOY(sha1sum, md5sum, NULL, TOYFLAG_USR|TOYFLAG_BIN))
+
+config MD5SUM
+ bool "md5sum"
+ default n
+ help
+ usage: md5sum [FILE]...
+
+ Calculate md5 hash for each input file, reading from stdin if none.
+ Output one hash (16 hex digits) for each input file, followed by
+ filename.
+
+config MD5SUM_SHA1SUM
+ bool "sha1sum"
+ depends on MD5SUM
+ help
+ usage: sha1sum [FILE]...
+
+ calculate sha1 hash for each input file, reading from stdin if one.
+ Output one hash (20 hex digits) for each input file, followed by
+ filename.
+*/
+
+#define FOR_md5sum
+#include "toys.h"
+
+GLOBALS(
+ unsigned state[5];
+ unsigned oldstate[5];
+ uint64_t count;
+ union {
+ char c[64];
+ unsigned i[16];
+ } buffer;
+)
+
+// for(i=0; i<64; i++) md5table[i] = abs(sin(i+1))*(1<<32); But calculating
+// that involves not just floating point but pulling in -lm (and arguing with
+// C about whether 1<<32 is a valid thing to do on 32 bit platforms) so:
+
+static uint32_t md5table[64] = {
+ 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 0xf57c0faf, 0x4787c62a,
+ 0xa8304613, 0xfd469501, 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
+ 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, 0xf61e2562, 0xc040b340,
+ 0x265e5a51, 0xe9b6c7aa, 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
+ 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, 0xa9e3e905, 0xfcefa3f8,
+ 0x676f02d9, 0x8d2a4c8a, 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
+ 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, 0x289b7ec6, 0xeaa127fa,
+ 0xd4ef3085, 0x04881d05, 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
+ 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, 0x655b59c3, 0x8f0ccc92,
+ 0xffeff47d, 0x85845dd1, 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
+ 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391
+};
+
+// Mix next 64 bytes of data into md5 hash
+
+static void md5_transform(void)
+{
+ unsigned x[4], *b = (unsigned *)TT.buffer.c;
+ int i;
+
+ memcpy(x, TT.state, sizeof(x));
+
+ for (i=0; i<64; i++) {
+ unsigned int in, a, rot, temp;
+
+ a = (-i)&3;
+ if (i<16) {
+ in = i;
+ rot = 7+(5*(i&3));
+ temp = x[(a+1)&3];
+ temp = (temp & x[(a+2)&3]) | ((~temp) & x[(a+3)&3]);
+ } else if (i<32) {
+ in = (1+(5*i))&15;
+ temp = (i&3)+1;
+ rot = temp*5;
+ if (temp&2) rot--;
+ temp = x[(a+3)&3];
+ temp = (x[(a+1)&3] & temp) | (x[(a+2)&3] & ~temp);
+ } else if (i<48) {
+ in = (5+(3*(i&15)))&15;
+ rot = i&3;
+ rot = 4+(5*rot)+((rot+1)&6);
+ temp = x[(a+1)&3] ^ x[(a+2)&3] ^ x[(a+3)&3];
+ } else {
+ in = (7*(i&15))&15;
+ rot = (i&3)+1;
+ rot = (5*rot)+(((rot+2)&2)>>1);
+ temp = x[(a+2)&3] ^ (x[(a+1)&3] | ~x[(a+3)&3]);
+ }
+ temp += x[a] + b[in] + md5table[i];
+ x[a] = x[(a+1)&3] + ((temp<<rot) | (temp>>(32-rot)));
+ }
+ for (i=0; i<4; i++) TT.state[i] += x[i];
+}
+
+// Mix next 64 bytes of data into sha1 hash.
+
+static const unsigned rconsts[]={0x5A827999,0x6ED9EBA1,0x8F1BBCDC,0xCA62C1D6};
+#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
+
+static void sha1_transform(void)
+{
+ int i, j, k, count;
+ unsigned *block = TT.buffer.i;
+ unsigned *rot[5], *temp;
+
+ // Copy context->state[] to working vars
+ for (i=0; i<5; i++) {
+ TT.oldstate[i] = TT.state[i];
+ rot[i] = TT.state + i;
+ }
+ // 4 rounds of 20 operations each.
+ for (i=count=0; i<4; i++) {
+ for (j=0; j<20; j++) {
+ unsigned work;
+
+ work = *rot[2] ^ *rot[3];
+ if (!i) work = (work & *rot[1]) ^ *rot[3];
+ else {
+ if (i==2) work = ((*rot[1]|*rot[2])&*rot[3])|(*rot[1]&*rot[2]);
+ else work ^= *rot[1];
+ }
+
+ if (!i && j<16)
+ work += block[count] = (rol(block[count],24)&0xFF00FF00)
+ | (rol(block[count],8)&0x00FF00FF);
+ else
+ work += block[count&15] = rol(block[(count+13)&15]
+ ^ block[(count+8)&15] ^ block[(count+2)&15] ^ block[count&15], 1);
+ *rot[4] += work + rol(*rot[0],5) + rconsts[i];
+ *rot[1] = rol(*rot[1],30);
+
+ // Rotate by one for next time.
+ temp = rot[4];
+ for (k=4; k; k--) rot[k] = rot[k-1];
+ *rot = temp;
+ count++;
+ }
+ }
+ // Add the previous values of state[]
+ for (i=0; i<5; i++) TT.state[i] += TT.oldstate[i];
+}
+
+// Fill the 64-byte working buffer and call transform() when full.
+
+static void hash_update(char *data, unsigned int len, void (*transform)(void))
+{
+ unsigned int i, j;
+
+ j = TT.count & 63;
+ TT.count += len;
+
+ // Enough data to process a frame?
+ if ((j + len) > 63) {
+ i = 64-j;
+ memcpy(TT.buffer.c + j, data, i);
+ transform();
+ for ( ; i + 63 < len; i += 64) {
+ memcpy(TT.buffer.c, data + i, 64);
+ transform();
+ }
+ j = 0;
+ } else i = 0;
+ // Grab remaining chunk
+ memcpy(TT.buffer.c + j, data + i, len - i);
+}
+
+// Callback for loopfiles()
+
+static void do_hash(int fd, char *name)
+{
+ uint64_t count;
+ int i, sha1=toys.which->name[0]=='s';;
+ char buf;
+ void (*transform)(void);
+
+ /* SHA1 initialization constants (md5sum uses first 4) */
+ TT.state[0] = 0x67452301;
+ TT.state[1] = 0xEFCDAB89;
+ TT.state[2] = 0x98BADCFE;
+ TT.state[3] = 0x10325476;
+ TT.state[4] = 0xC3D2E1F0;
+ TT.count = 0;
+
+ transform = sha1 ? sha1_transform : md5_transform;
+ for (;;) {
+ i = read(fd, toybuf, sizeof(toybuf));
+ if (i<1) break;
+ hash_update(toybuf, i, transform);
+ }
+
+ count = TT.count << 3;
+
+ // End the message by appending a "1" bit to the data, ending with the
+ // message size (in bits, big endian), and adding enough zero bits in
+ // between to pad to the end of the next 64-byte frame.
+ //
+ // Since our input up to now has been in whole bytes, we can deal with
+ // bytes here too.
+
+ buf = 0x80;
+ do {
+ hash_update(&buf, 1, transform);
+ buf = 0;
+ } while ((TT.count & 63) != 56);
+ if (sha1) count=bswap_64(count);
+ for (i = 0; i < 8; i++)
+ TT.buffer.c[56+i] = count >> (8*i);
+ transform();
+
+ if (sha1)
+ for (i = 0; i < 20; i++)
+ printf("%02x", 255&(TT.state[i>>2] >> ((3-(i & 3)) * 8)));
+ else for (i=0; i<4; i++) printf("%08x", SWAP_BE32(TT.state[i]));
+
+ // Wipe variables. Cryptographer paranoia.
+ memset(&TT, 0, sizeof(TT));
+
+ printf(" %s\n", name);
+}
+
+void md5sum_main(void)
+{
+ loopfiles(toys.optargs, do_hash);
+}
diff --git a/toys/other/sha1sum.c b/toys/other/sha1sum.c
deleted file mode 100644
index 984baad5..00000000
--- a/toys/other/sha1sum.c
+++ /dev/null
@@ -1,156 +0,0 @@
-/* vi: set sw=4 ts=4:
- *
- * sha1sum.c - Calculate sha1 cryptographic hash for input.
- *
- * Copyright 2007 Rob Landley <rob@landley.net>
- *
- * Based on the public domain SHA-1 in C by Steve Reid <steve@edmweb.com>
- * from http://www.mirrors.wiretapped.net/security/cryptography/hashes/sha1/
-
-USE_SHA1SUM(NEWTOY(sha1sum, NULL, TOYFLAG_USR|TOYFLAG_BIN))
-
-config SHA1SUM
- bool "sha1sum"
- default y
- help
- usage: sha1sum [file...]
-
- Calculate sha1 hash of files (or stdin).
-*/
-
-#define FOR_sha1sum
-#include <toys.h>
-
-GLOBALS(
- uint32_t state[5];
- uint32_t oldstate[5];
- uint64_t count;
- union {
- unsigned char c[64];
- uint32_t i[16];
- } buffer;
-)
-
-
-static const unsigned rconsts[]={0x5A827999,0x6ED9EBA1,0x8F1BBCDC,0xCA62C1D6};
-
-// Hash a single 512-bit block. This is the core of the algorithm.
-
-#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
-static void sha1_transform(void)
-{
- int i, j, k, count;
- unsigned *block = TT.buffer.i;
- unsigned *rot[5], *temp;
-
- // Copy context->state[] to working vars
- for (i=0; i<5; i++) {
- TT.oldstate[i] = TT.state[i];
- rot[i] = TT.state + i;
- }
- // 4 rounds of 20 operations each.
- for (i=count=0; i<4; i++) {
- for (j=0; j<20; j++) {
- unsigned work;
-
- work = *rot[2] ^ *rot[3];
- if (!i) work = (work & *rot[1]) ^ *rot[3];
- else {
- if (i==2)
- work = ((*rot[1]|*rot[2])&*rot[3])|(*rot[1]&*rot[2]);
- else work ^= *rot[1];
- }
-
- if (!i && j<16) work += block[count] = (rol(block[count],24)&0xFF00FF00) | (rol(block[count],8)&0x00FF00FF);
- else work += block[count&15] = rol(block[(count+13)&15]^block[(count+8)&15]^block[(count+2)&15]^block[count&15],1);
- *rot[4] += work + rol(*rot[0],5) + rconsts[i];
- *rot[1] = rol(*rot[1],30);
-
- // Rotate by one for next time.
- temp = rot[4];
- for (k=4; k; k--) rot[k] = rot[k-1];
- *rot = temp;
- count++;
- }
- }
- // Add the previous values of state[]
- for (i=0; i<5; i++) TT.state[i] += TT.oldstate[i];
-}
-
-// Fill the 64-byte working buffer and call sha1_transform() when full.
-
-static void sha1_update(char *data, unsigned int len)
-{
- unsigned int i, j;
-
- j = TT.count & 63;
- TT.count += len;
-
- // Enough data to process a frame?
- if ((j + len) > 63) {
- i = 64-j;
- memcpy(TT.buffer.c + j, data, i);
- sha1_transform();
- for ( ; i + 63 < len; i += 64) {
- memcpy(TT.buffer.c, data + i, 64);
- sha1_transform();
- }
- j = 0;
- } else i = 0;
- // Grab remaining chunk
- memcpy(TT.buffer.c + j, data + i, len - i);
-}
-
-// Callback for loopfiles()
-
-static void do_sha1(int fd, char *name)
-{
- uint64_t count;
- int i;
- char buf;
-
- /* SHA1 initialization constants */
- TT.state[0] = 0x67452301;
- TT.state[1] = 0xEFCDAB89;
- TT.state[2] = 0x98BADCFE;
- TT.state[3] = 0x10325476;
- TT.state[4] = 0xC3D2E1F0;
- TT.count = 0;
-
- for (;;) {
- i = read(fd, toybuf, sizeof(toybuf));
- if (i<1) break;
- sha1_update(toybuf, i);
- }
-
- count = TT.count << 3;
-
- // End the message by appending a "1" bit to the data, ending with the
- // message size (in bits, big endian), and adding enough zero bits in
- // between to pad to the end of the next 64-byte frame.
- //
- // Since our input up to now has been in whole bytes, we can deal with
- // bytes here too.
-
- buf = 0x80;
- do {
- sha1_update(&buf, 1);
- buf = 0;
- } while ((TT.count & 63) != 56);
- for (i = 0; i < 8; i++)
- TT.buffer.c[56+i] = count >> (8*(7-i));
- sha1_transform();
-
- for (i = 0; i < 20; i++)
- toybuf[i] = TT.state[i>>2] >> ((3-(i & 3)) * 8);
- // Wipe variables. Cryptogropher paranoia.
- memset(&TT, 0, sizeof(TT));
-
- for (i = 0; i < 20; i++) printf("%02x", toybuf[i]);
- printf(" %s\n", name);
-}
-
-void sha1sum_main(void)
-{
- loopfiles(toys.optargs, do_sha1);
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 02:58:50 +0000