From 3a9241add947cb6d24b5de7a8927517426a78795 Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Sat, 25 Aug 2012 14:25:22 -0500 Subject: Move commands into "posix", "lsb", and "other" menus/directories. --- toys/sha1sum.c | 185 --------------------------------------------------------- 1 file changed, 185 deletions(-) delete mode 100644 toys/sha1sum.c (limited to 'toys/sha1sum.c') diff --git a/toys/sha1sum.c b/toys/sha1sum.c deleted file mode 100644 index 3229cd12..00000000 --- a/toys/sha1sum.c +++ /dev/null @@ -1,185 +0,0 @@ -/* vi: set sw=4 ts=4: - * - * sha1sum.c - Calculate sha1 cryptographic hash for input. - * - * Copyright 2007 Rob Landley - * - * Based on the public domain SHA-1 in C by Steve Reid - * from http://www.mirrors.wiretapped.net/security/cryptography/hashes/sha1/ - * - * Not in SUSv3. - -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). -*/ - -#include - -struct sha1 { - uint32_t state[5]; - uint32_t oldstate[5]; - uint64_t count; - union { - unsigned char c[64]; - uint32_t i[16]; - } buffer; -}; - -static void sha1_init(struct sha1 *this); -static void sha1_transform(struct sha1 *this); -static void sha1_update(struct sha1 *this, char *data, unsigned int len); -static void sha1_final(struct sha1 *this, char digest[20]); - -#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) - -// blk0() and blk() perform the initial expand. -// The idea of expanding during the round function comes from SSLeay -#if 1 -#define blk0(i) (block[i] = (rol(block[i],24)&0xFF00FF00) \ - |(rol(block[i],8)&0x00FF00FF)) -#else // big endian? -#define blk0(i) block[i] -#endif -#define blk(i) (block[i&15] = rol(block[(i+13)&15]^block[(i+8)&15] \ - ^block[(i+2)&15]^block[i&15],1)) - -static const uint32_t rconsts[]={0x5A827999,0x6ED9EBA1,0x8F1BBCDC,0xCA62C1D6}; - -// Hash a single 512-bit block. This is the core of the algorithm. - -static void sha1_transform(struct sha1 *this) -{ - int i, j, k, count; - uint32_t *block = this->buffer.i; - uint32_t *rot[5], *temp; - - // Copy context->state[] to working vars - for (i=0; i<5; i++) { - this->oldstate[i] = this->state[i]; - rot[i] = this->state + i; - } - // 4 rounds of 20 operations each. - for (i=count=0; i<4; i++) { - for (j=0; j<20; j++) { - uint32_t 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 += blk0(count); - else work += blk(count); - *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++) this->state[i] += this->oldstate[i]; -} - - -// Initialize a struct sha1. - -static void sha1_init(struct sha1 *this) -{ - /* SHA1 initialization constants */ - this->state[0] = 0x67452301; - this->state[1] = 0xEFCDAB89; - this->state[2] = 0x98BADCFE; - this->state[3] = 0x10325476; - this->state[4] = 0xC3D2E1F0; - this->count = 0; -} - -// Fill the 64-byte working buffer and call sha1_transform() when full. - -void sha1_update(struct sha1 *this, char *data, unsigned int len) -{ - unsigned int i, j; - - j = this->count & 63; - this->count += len; - - // Enough data to process a frame? - if ((j + len) > 63) { - i = 64-j; - memcpy(this->buffer.c + j, data, i); - sha1_transform(this); - for ( ; i + 63 < len; i += 64) { - memcpy(this->buffer.c, data + i, 64); - sha1_transform(this); - } - j = 0; - } else i = 0; - // Grab remaining chunk - memcpy(this->buffer.c + j, data + i, len - i); -} - -// Add padding and return the message digest. - -void sha1_final(struct sha1 *this, char digest[20]) -{ - uint64_t count = this->count << 3; - unsigned int i; - char buf; - - // 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(this, &buf, 1); - buf = 0; - } while ((this->count & 63) != 56); - for (i = 0; i < 8; i++) - this->buffer.c[56+i] = count >> (8*(7-i)); - sha1_transform(this); - - for (i = 0; i < 20; i++) - digest[i] = this->state[i>>2] >> ((3-(i & 3)) * 8); - // Wipe variables. Cryptogropher paranoia. - memset(this, 0, sizeof(struct sha1)); -} - -// Callback for loopfiles() - -static void do_sha1(int fd, char *name) -{ - struct sha1 this; - int len; - - sha1_init(&this); - for (;;) { - len = read(fd, toybuf, sizeof(toybuf)); - if (len<1) break; - sha1_update(&this, toybuf, len); - } - sha1_final(&this, toybuf); - for (len = 0; len < 20; len++) printf("%02x", toybuf[len]); - printf(" %s\n", name); -} - -void sha1sum_main(void) -{ - loopfiles(toys.optargs, do_sha1); -} -- cgit v1.2.3