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Diffstat (limited to '')
-rw-r--r-- | contrib/pgcrypto/sha1.c | 331 |
1 files changed, 331 insertions, 0 deletions
diff --git a/contrib/pgcrypto/sha1.c b/contrib/pgcrypto/sha1.c new file mode 100644 index 0000000..64671ac --- /dev/null +++ b/contrib/pgcrypto/sha1.c @@ -0,0 +1,331 @@ +/* $KAME: sha1.c,v 1.3 2000/02/22 14:01:18 itojun Exp $ */ + +/* + * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * contrib/pgcrypto/sha1.c + */ +/* + * FIPS pub 180-1: Secure Hash Algorithm (SHA-1) + * based on: http://www.itl.nist.gov/fipspubs/fip180-1.htm + * implemented by Jun-ichiro itojun Itoh <itojun@itojun.org> + */ + +#include "postgres.h" + +#include <sys/param.h> + +#include "sha1.h" + +/* constant table */ +static uint32 _K[] = {0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6}; + +#define K(t) _K[(t) / 20] + +#define F0(b, c, d) (((b) & (c)) | ((~(b)) & (d))) +#define F1(b, c, d) (((b) ^ (c)) ^ (d)) +#define F2(b, c, d) (((b) & (c)) | ((b) & (d)) | ((c) & (d))) +#define F3(b, c, d) (((b) ^ (c)) ^ (d)) + +#define S(n, x) (((x) << (n)) | ((x) >> (32 - (n)))) + +#define H(n) (ctxt->h.b32[(n)]) +#define COUNT (ctxt->count) +#define BCOUNT (ctxt->c.b64[0] / 8) +#define W(n) (ctxt->m.b32[(n)]) + +#define PUTPAD(x) \ +do { \ + ctxt->m.b8[(COUNT % 64)] = (x); \ + COUNT++; \ + COUNT %= 64; \ + if (COUNT % 64 == 0) \ + sha1_step(ctxt); \ +} while (0) + +static void sha1_step(struct sha1_ctxt *); + +static void +sha1_step(struct sha1_ctxt *ctxt) +{ + uint32 a, + b, + c, + d, + e; + size_t t, + s; + uint32 tmp; + +#ifndef WORDS_BIGENDIAN + struct sha1_ctxt tctxt; + + memmove(&tctxt.m.b8[0], &ctxt->m.b8[0], 64); + ctxt->m.b8[0] = tctxt.m.b8[3]; + ctxt->m.b8[1] = tctxt.m.b8[2]; + ctxt->m.b8[2] = tctxt.m.b8[1]; + ctxt->m.b8[3] = tctxt.m.b8[0]; + ctxt->m.b8[4] = tctxt.m.b8[7]; + ctxt->m.b8[5] = tctxt.m.b8[6]; + ctxt->m.b8[6] = tctxt.m.b8[5]; + ctxt->m.b8[7] = tctxt.m.b8[4]; + ctxt->m.b8[8] = tctxt.m.b8[11]; + ctxt->m.b8[9] = tctxt.m.b8[10]; + ctxt->m.b8[10] = tctxt.m.b8[9]; + ctxt->m.b8[11] = tctxt.m.b8[8]; + ctxt->m.b8[12] = tctxt.m.b8[15]; + ctxt->m.b8[13] = tctxt.m.b8[14]; + ctxt->m.b8[14] = tctxt.m.b8[13]; + ctxt->m.b8[15] = tctxt.m.b8[12]; + ctxt->m.b8[16] = tctxt.m.b8[19]; + ctxt->m.b8[17] = tctxt.m.b8[18]; + ctxt->m.b8[18] = tctxt.m.b8[17]; + ctxt->m.b8[19] = tctxt.m.b8[16]; + ctxt->m.b8[20] = tctxt.m.b8[23]; + ctxt->m.b8[21] = tctxt.m.b8[22]; + ctxt->m.b8[22] = tctxt.m.b8[21]; + ctxt->m.b8[23] = tctxt.m.b8[20]; + ctxt->m.b8[24] = tctxt.m.b8[27]; + ctxt->m.b8[25] = tctxt.m.b8[26]; + ctxt->m.b8[26] = tctxt.m.b8[25]; + ctxt->m.b8[27] = tctxt.m.b8[24]; + ctxt->m.b8[28] = tctxt.m.b8[31]; + ctxt->m.b8[29] = tctxt.m.b8[30]; + ctxt->m.b8[30] = tctxt.m.b8[29]; + ctxt->m.b8[31] = tctxt.m.b8[28]; + ctxt->m.b8[32] = tctxt.m.b8[35]; + ctxt->m.b8[33] = tctxt.m.b8[34]; + ctxt->m.b8[34] = tctxt.m.b8[33]; + ctxt->m.b8[35] = tctxt.m.b8[32]; + ctxt->m.b8[36] = tctxt.m.b8[39]; + ctxt->m.b8[37] = tctxt.m.b8[38]; + ctxt->m.b8[38] = tctxt.m.b8[37]; + ctxt->m.b8[39] = tctxt.m.b8[36]; + ctxt->m.b8[40] = tctxt.m.b8[43]; + ctxt->m.b8[41] = tctxt.m.b8[42]; + ctxt->m.b8[42] = tctxt.m.b8[41]; + ctxt->m.b8[43] = tctxt.m.b8[40]; + ctxt->m.b8[44] = tctxt.m.b8[47]; + ctxt->m.b8[45] = tctxt.m.b8[46]; + ctxt->m.b8[46] = tctxt.m.b8[45]; + ctxt->m.b8[47] = tctxt.m.b8[44]; + ctxt->m.b8[48] = tctxt.m.b8[51]; + ctxt->m.b8[49] = tctxt.m.b8[50]; + ctxt->m.b8[50] = tctxt.m.b8[49]; + ctxt->m.b8[51] = tctxt.m.b8[48]; + ctxt->m.b8[52] = tctxt.m.b8[55]; + ctxt->m.b8[53] = tctxt.m.b8[54]; + ctxt->m.b8[54] = tctxt.m.b8[53]; + ctxt->m.b8[55] = tctxt.m.b8[52]; + ctxt->m.b8[56] = tctxt.m.b8[59]; + ctxt->m.b8[57] = tctxt.m.b8[58]; + ctxt->m.b8[58] = tctxt.m.b8[57]; + ctxt->m.b8[59] = tctxt.m.b8[56]; + ctxt->m.b8[60] = tctxt.m.b8[63]; + ctxt->m.b8[61] = tctxt.m.b8[62]; + ctxt->m.b8[62] = tctxt.m.b8[61]; + ctxt->m.b8[63] = tctxt.m.b8[60]; +#endif + + a = H(0); + b = H(1); + c = H(2); + d = H(3); + e = H(4); + + for (t = 0; t < 20; t++) + { + s = t & 0x0f; + if (t >= 16) + W(s) = S(1, W((s + 13) & 0x0f) ^ W((s + 8) & 0x0f) ^ W((s + 2) & 0x0f) ^ W(s)); + tmp = S(5, a) + F0(b, c, d) + e + W(s) + K(t); + e = d; + d = c; + c = S(30, b); + b = a; + a = tmp; + } + for (t = 20; t < 40; t++) + { + s = t & 0x0f; + W(s) = S(1, W((s + 13) & 0x0f) ^ W((s + 8) & 0x0f) ^ W((s + 2) & 0x0f) ^ W(s)); + tmp = S(5, a) + F1(b, c, d) + e + W(s) + K(t); + e = d; + d = c; + c = S(30, b); + b = a; + a = tmp; + } + for (t = 40; t < 60; t++) + { + s = t & 0x0f; + W(s) = S(1, W((s + 13) & 0x0f) ^ W((s + 8) & 0x0f) ^ W((s + 2) & 0x0f) ^ W(s)); + tmp = S(5, a) + F2(b, c, d) + e + W(s) + K(t); + e = d; + d = c; + c = S(30, b); + b = a; + a = tmp; + } + for (t = 60; t < 80; t++) + { + s = t & 0x0f; + W(s) = S(1, W((s + 13) & 0x0f) ^ W((s + 8) & 0x0f) ^ W((s + 2) & 0x0f) ^ W(s)); + tmp = S(5, a) + F3(b, c, d) + e + W(s) + K(t); + e = d; + d = c; + c = S(30, b); + b = a; + a = tmp; + } + + H(0) = H(0) + a; + H(1) = H(1) + b; + H(2) = H(2) + c; + H(3) = H(3) + d; + H(4) = H(4) + e; + + memset(&ctxt->m.b8[0], 0, 64); +} + +/*------------------------------------------------------------*/ + +void +sha1_init(struct sha1_ctxt *ctxt) +{ + memset(ctxt, 0, sizeof(struct sha1_ctxt)); + H(0) = 0x67452301; + H(1) = 0xefcdab89; + H(2) = 0x98badcfe; + H(3) = 0x10325476; + H(4) = 0xc3d2e1f0; +} + +void +sha1_pad(struct sha1_ctxt *ctxt) +{ + size_t padlen; /* pad length in bytes */ + size_t padstart; + + PUTPAD(0x80); + + padstart = COUNT % 64; + padlen = 64 - padstart; + if (padlen < 8) + { + memset(&ctxt->m.b8[padstart], 0, padlen); + COUNT += padlen; + COUNT %= 64; + sha1_step(ctxt); + padstart = COUNT % 64; /* should be 0 */ + padlen = 64 - padstart; /* should be 64 */ + } + memset(&ctxt->m.b8[padstart], 0, padlen - 8); + COUNT += (padlen - 8); + COUNT %= 64; +#ifdef WORDS_BIGENDIAN + PUTPAD(ctxt->c.b8[0]); + PUTPAD(ctxt->c.b8[1]); + PUTPAD(ctxt->c.b8[2]); + PUTPAD(ctxt->c.b8[3]); + PUTPAD(ctxt->c.b8[4]); + PUTPAD(ctxt->c.b8[5]); + PUTPAD(ctxt->c.b8[6]); + PUTPAD(ctxt->c.b8[7]); +#else + PUTPAD(ctxt->c.b8[7]); + PUTPAD(ctxt->c.b8[6]); + PUTPAD(ctxt->c.b8[5]); + PUTPAD(ctxt->c.b8[4]); + PUTPAD(ctxt->c.b8[3]); + PUTPAD(ctxt->c.b8[2]); + PUTPAD(ctxt->c.b8[1]); + PUTPAD(ctxt->c.b8[0]); +#endif +} + +void +sha1_loop(struct sha1_ctxt *ctxt, const uint8 *input0, size_t len) +{ + const uint8 *input; + size_t gaplen; + size_t gapstart; + size_t off; + size_t copysiz; + + input = (const uint8 *) input0; + off = 0; + + while (off < len) + { + gapstart = COUNT % 64; + gaplen = 64 - gapstart; + + copysiz = (gaplen < len - off) ? gaplen : len - off; + memmove(&ctxt->m.b8[gapstart], &input[off], copysiz); + COUNT += copysiz; + COUNT %= 64; + ctxt->c.b64[0] += copysiz * 8; + if (COUNT % 64 == 0) + sha1_step(ctxt); + off += copysiz; + } +} + +void +sha1_result(struct sha1_ctxt *ctxt, uint8 *digest0) +{ + uint8 *digest; + + digest = (uint8 *) digest0; + sha1_pad(ctxt); +#ifdef WORDS_BIGENDIAN + memmove(digest, &ctxt->h.b8[0], 20); +#else + digest[0] = ctxt->h.b8[3]; + digest[1] = ctxt->h.b8[2]; + digest[2] = ctxt->h.b8[1]; + digest[3] = ctxt->h.b8[0]; + digest[4] = ctxt->h.b8[7]; + digest[5] = ctxt->h.b8[6]; + digest[6] = ctxt->h.b8[5]; + digest[7] = ctxt->h.b8[4]; + digest[8] = ctxt->h.b8[11]; + digest[9] = ctxt->h.b8[10]; + digest[10] = ctxt->h.b8[9]; + digest[11] = ctxt->h.b8[8]; + digest[12] = ctxt->h.b8[15]; + digest[13] = ctxt->h.b8[14]; + digest[14] = ctxt->h.b8[13]; + digest[15] = ctxt->h.b8[12]; + digest[16] = ctxt->h.b8[19]; + digest[17] = ctxt->h.b8[18]; + digest[18] = ctxt->h.b8[17]; + digest[19] = ctxt->h.b8[16]; +#endif +} |