summaryrefslogtreecommitdiffstats
path: root/contrib/pgcrypto/sha1.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/pgcrypto/sha1.c')
-rw-r--r--contrib/pgcrypto/sha1.c331
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
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-15 13:46:40 +0000