From 957613be18e6b771ed932222361ff7faa5234c76 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Wed, 15 Aug 2001 18:42:55 +0000
Subject: [PATCH] Add new files.
---
src/backend/libpq/md5.c | 303 ++++++++++++++++++++++++++++++++++++++++
src/include/libpq/md5.h | 21 +++
2 files changed, 324 insertions(+)
create mode 100644 src/backend/libpq/md5.c
create mode 100644 src/include/libpq/md5.h
diff --git a/src/backend/libpq/md5.c b/src/backend/libpq/md5.c
new file mode 100644
index 00000000000..20392fb4e7a
--- /dev/null
+++ b/src/backend/libpq/md5.c
@@ -0,0 +1,303 @@
+/*
+ * md5.c
+ *
+ * Implements the MD5 Message-Digest Algorithm as specified in
+ * RFC 1321. This implementation is a simple one, in that it
+ * needs every input byte to be buffered before doing any
+ * calculations. I do not expect this file to be used for
+ * general purpose MD5'ing of large amounts of data, only for
+ * generating hashed passwords from limited input.
+ *
+ * Sverre H. Huseby <sverrehu@online.no>
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "postgres.h"
+#include "libpq/md5.h"
+
+/*
+ * PRIVATE FUNCTIONS
+ */
+
+typedef unsigned char unsigned8;
+typedef unsigned int unsigned32;
+typedef unsigned long unsigned64;
+
+/*
+ * The returned array is allocated using malloc. the caller should free it
+ * when it is no longer needed.
+ */
+static unsigned8 *
+createPaddedCopyWithLength(unsigned8 *b, unsigned32 *l)
+{
+ unsigned8 *ret;
+ unsigned32 q;
+ unsigned32 len, newLen448;
+ unsigned64 len64;
+
+ len = ((b == NULL) ? 0 : *l);
+ newLen448 = len + 64 - (len % 64) - 8;
+ if (newLen448 <= len)
+ newLen448 += 64;
+
+ *l = newLen448 + 8;
+ if ((ret = (unsigned8 *) malloc(sizeof(unsigned8) * *l)) == NULL)
+ return NULL;
+
+ if (b != NULL)
+ memcpy(ret, b, sizeof(unsigned8) * len);
+
+ /* pad */
+ ret[len] = 0x80;
+ for (q = len + 1; q < newLen448; q++)
+ ret[q] = 0x00;
+
+ /* append length as a 64 bit bitcount */
+ len64 = len;
+ len64 <<= 3;
+ q = newLen448;
+ ret[q++] = (len64 & 0xFF);
+ len64 >>= 8;
+ ret[q++] = (len64 & 0xFF);
+ len64 >>= 8;
+ ret[q++] = (len64 & 0xFF);
+ len64 >>= 8;
+ ret[q++] = (len64 & 0xFF);
+ len64 >>= 8;
+ ret[q++] = (len64 & 0xFF);
+ len64 >>= 8;
+ ret[q++] = (len64 & 0xFF);
+ len64 >>= 8;
+ ret[q++] = (len64 & 0xFF);
+ len64 >>= 8;
+ ret[q] = (len64 & 0xFF);
+
+ return ret;
+}
+
+#define F(x, y, z) (((x) & (y)) | (~(x) & (z)))
+#define G(x, y, z) (((x) & (z)) | ((y) & ~(z)))
+#define H(x, y, z) ((x) ^ (y) ^ (z))
+#define I(x, y, z) ((y) ^ ((x) | ~(z)))
+#define ROT_LEFT(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
+
+static void
+doTheRounds(unsigned32 X[16], unsigned32 state[4])
+{
+ unsigned32 a, b, c, d;
+
+ a = state[0];
+ b = state[1];
+ c = state[2];
+ d = state[3];
+
+ /* round 1 */
+ a = b + ROT_LEFT((a + F(b, c, d) + X[ 0] + 0xd76aa478), 7); /* 1 */
+ d = a + ROT_LEFT((d + F(a, b, c) + X[ 1] + 0xe8c7b756), 12); /* 2 */
+ c = d + ROT_LEFT((c + F(d, a, b) + X[ 2] + 0x242070db), 17); /* 3 */
+ b = c + ROT_LEFT((b + F(c, d, a) + X[ 3] + 0xc1bdceee), 22); /* 4 */
+ a = b + ROT_LEFT((a + F(b, c, d) + X[ 4] + 0xf57c0faf), 7); /* 5 */
+ d = a + ROT_LEFT((d + F(a, b, c) + X[ 5] + 0x4787c62a), 12); /* 6 */
+ c = d + ROT_LEFT((c + F(d, a, b) + X[ 6] + 0xa8304613), 17); /* 7 */
+ b = c + ROT_LEFT((b + F(c, d, a) + X[ 7] + 0xfd469501), 22); /* 8 */
+ a = b + ROT_LEFT((a + F(b, c, d) + X[ 8] + 0x698098d8), 7); /* 9 */
+ d = a + ROT_LEFT((d + F(a, b, c) + X[ 9] + 0x8b44f7af), 12); /* 10 */
+ c = d + ROT_LEFT((c + F(d, a, b) + X[10] + 0xffff5bb1), 17); /* 11 */
+ b = c + ROT_LEFT((b + F(c, d, a) + X[11] + 0x895cd7be), 22); /* 12 */
+ a = b + ROT_LEFT((a + F(b, c, d) + X[12] + 0x6b901122), 7); /* 13 */
+ d = a + ROT_LEFT((d + F(a, b, c) + X[13] + 0xfd987193), 12); /* 14 */
+ c = d + ROT_LEFT((c + F(d, a, b) + X[14] + 0xa679438e), 17); /* 15 */
+ b = c + ROT_LEFT((b + F(c, d, a) + X[15] + 0x49b40821), 22); /* 16 */
+
+ /* round 2 */
+ a = b + ROT_LEFT((a + G(b, c, d) + X[ 1] + 0xf61e2562), 5); /* 17 */
+ d = a + ROT_LEFT((d + G(a, b, c) + X[ 6] + 0xc040b340), 9); /* 18 */
+ c = d + ROT_LEFT((c + G(d, a, b) + X[11] + 0x265e5a51), 14); /* 19 */
+ b = c + ROT_LEFT((b + G(c, d, a) + X[ 0] + 0xe9b6c7aa), 20); /* 20 */
+ a = b + ROT_LEFT((a + G(b, c, d) + X[ 5] + 0xd62f105d), 5); /* 21 */
+ d = a + ROT_LEFT((d + G(a, b, c) + X[10] + 0x02441453), 9); /* 22 */
+ c = d + ROT_LEFT((c + G(d, a, b) + X[15] + 0xd8a1e681), 14); /* 23 */
+ b = c + ROT_LEFT((b + G(c, d, a) + X[ 4] + 0xe7d3fbc8), 20); /* 24 */
+ a = b + ROT_LEFT((a + G(b, c, d) + X[ 9] + 0x21e1cde6), 5); /* 25 */
+ d = a + ROT_LEFT((d + G(a, b, c) + X[14] + 0xc33707d6), 9); /* 26 */
+ c = d + ROT_LEFT((c + G(d, a, b) + X[ 3] + 0xf4d50d87), 14); /* 27 */
+ b = c + ROT_LEFT((b + G(c, d, a) + X[ 8] + 0x455a14ed), 20); /* 28 */
+ a = b + ROT_LEFT((a + G(b, c, d) + X[13] + 0xa9e3e905), 5); /* 29 */
+ d = a + ROT_LEFT((d + G(a, b, c) + X[ 2] + 0xfcefa3f8), 9); /* 30 */
+ c = d + ROT_LEFT((c + G(d, a, b) + X[ 7] + 0x676f02d9), 14); /* 31 */
+ b = c + ROT_LEFT((b + G(c, d, a) + X[12] + 0x8d2a4c8a), 20); /* 32 */
+
+ /* round 3 */
+ a = b + ROT_LEFT((a + H(b, c, d) + X[ 5] + 0xfffa3942), 4); /* 33 */
+ d = a + ROT_LEFT((d + H(a, b, c) + X[ 8] + 0x8771f681), 11); /* 34 */
+ c = d + ROT_LEFT((c + H(d, a, b) + X[11] + 0x6d9d6122), 16); /* 35 */
+ b = c + ROT_LEFT((b + H(c, d, a) + X[14] + 0xfde5380c), 23); /* 36 */
+ a = b + ROT_LEFT((a + H(b, c, d) + X[ 1] + 0xa4beea44), 4); /* 37 */
+ d = a + ROT_LEFT((d + H(a, b, c) + X[ 4] + 0x4bdecfa9), 11); /* 38 */
+ c = d + ROT_LEFT((c + H(d, a, b) + X[ 7] + 0xf6bb4b60), 16); /* 39 */
+ b = c + ROT_LEFT((b + H(c, d, a) + X[10] + 0xbebfbc70), 23); /* 40 */
+ a = b + ROT_LEFT((a + H(b, c, d) + X[13] + 0x289b7ec6), 4); /* 41 */
+ d = a + ROT_LEFT((d + H(a, b, c) + X[ 0] + 0xeaa127fa), 11); /* 42 */
+ c = d + ROT_LEFT((c + H(d, a, b) + X[ 3] + 0xd4ef3085), 16); /* 43 */
+ b = c + ROT_LEFT((b + H(c, d, a) + X[ 6] + 0x04881d05), 23); /* 44 */
+ a = b + ROT_LEFT((a + H(b, c, d) + X[ 9] + 0xd9d4d039), 4); /* 45 */
+ d = a + ROT_LEFT((d + H(a, b, c) + X[12] + 0xe6db99e5), 11); /* 46 */
+ c = d + ROT_LEFT((c + H(d, a, b) + X[15] + 0x1fa27cf8), 16); /* 47 */
+ b = c + ROT_LEFT((b + H(c, d, a) + X[ 2] + 0xc4ac5665), 23); /* 48 */
+
+ /* round 4 */
+ a = b + ROT_LEFT((a + I(b, c, d) + X[ 0] + 0xf4292244), 6); /* 49 */
+ d = a + ROT_LEFT((d + I(a, b, c) + X[ 7] + 0x432aff97), 10); /* 50 */
+ c = d + ROT_LEFT((c + I(d, a, b) + X[14] + 0xab9423a7), 15); /* 51 */
+ b = c + ROT_LEFT((b + I(c, d, a) + X[ 5] + 0xfc93a039), 21); /* 52 */
+ a = b + ROT_LEFT((a + I(b, c, d) + X[12] + 0x655b59c3), 6); /* 53 */
+ d = a + ROT_LEFT((d + I(a, b, c) + X[ 3] + 0x8f0ccc92), 10); /* 54 */
+ c = d + ROT_LEFT((c + I(d, a, b) + X[10] + 0xffeff47d), 15); /* 55 */
+ b = c + ROT_LEFT((b + I(c, d, a) + X[ 1] + 0x85845dd1), 21); /* 56 */
+ a = b + ROT_LEFT((a + I(b, c, d) + X[ 8] + 0x6fa87e4f), 6); /* 57 */
+ d = a + ROT_LEFT((d + I(a, b, c) + X[15] + 0xfe2ce6e0), 10); /* 58 */
+ c = d + ROT_LEFT((c + I(d, a, b) + X[ 6] + 0xa3014314), 15); /* 59 */
+ b = c + ROT_LEFT((b + I(c, d, a) + X[13] + 0x4e0811a1), 21); /* 60 */
+ a = b + ROT_LEFT((a + I(b, c, d) + X[ 4] + 0xf7537e82), 6); /* 61 */
+ d = a + ROT_LEFT((d + I(a, b, c) + X[11] + 0xbd3af235), 10); /* 62 */
+ c = d + ROT_LEFT((c + I(d, a, b) + X[ 2] + 0x2ad7d2bb), 15); /* 63 */
+ b = c + ROT_LEFT((b + I(c, d, a) + X[ 9] + 0xeb86d391), 21); /* 64 */
+
+ state[0] += a;
+ state[1] += b;
+ state[2] += c;
+ state[3] += d;
+}
+
+static int
+calculateDigestFromBuffer(unsigned8 *b, unsigned32 len, unsigned8 sum[16])
+{
+ register unsigned32 i, j, k, newI;
+ unsigned32 l;
+ unsigned8 *input;
+ register unsigned32 *wbp;
+ unsigned32 workBuff[16], state[4];
+
+ l = len;
+
+ state[0] = 0x67452301;
+ state[1] = 0xEFCDAB89;
+ state[2] = 0x98BADCFE;
+ state[3] = 0x10325476;
+
+ if ((input = createPaddedCopyWithLength(b, &l)) == NULL)
+ return 0;
+
+ for (i = 0;;) {
+ if ((newI = i + 16 * 4) > l)
+ break;
+ k = i + 3;
+ for (j = 0; j < 16; j++) {
+ wbp = (workBuff + j);
+ *wbp = input[k--];
+ *wbp <<= 8;
+ *wbp |= input[k--];
+ *wbp <<= 8;
+ *wbp |= input[k--];
+ *wbp <<= 8;
+ *wbp |= input[k];
+ k += 7;
+ }
+ doTheRounds(workBuff, state);
+ i = newI;
+ }
+ free(input);
+
+ j = 0;
+ for (i = 0; i < 4; i++) {
+ k = state[i];
+ sum[j++] = (k & 0xFF);
+ k >>= 8;
+ sum[j++] = (k & 0xFF);
+ k >>= 8;
+ sum[j++] = (k & 0xFF);
+ k >>= 8;
+ sum[j++] = (k & 0xFF);
+ }
+ return 1;
+}
+
+static void
+bytesToHex(unsigned8 b[16], char *s)
+{
+ static char *hex = "0123456789abcdef";
+ int q, w;
+
+ for (q = 0, w = 0; q < 16; q++) {
+ s[w++] = hex[(b[q] >> 4) & 0x0F];
+ s[w++] = hex[b[q] & 0x0F];
+ }
+ s[w] = '\0';
+}
+
+/*
+ * PUBLIC FUNCTIONS
+ */
+
+/*
+ * md5_hash
+ *
+ * Calculates the MD5 sum of the bytes in a buffer.
+ *
+ * SYNOPSIS #include "md5.h"
+ * int md5_hash(const void *buff, size_t len, char *hexsum)
+ *
+ * INPUT buff the buffer containing the bytes that you want
+ * the MD5 sum of.
+ * len number of bytes in the buffer.
+ *
+ * OUTPUT hexsum the MD5 sum as a '\0'-terminated string of
+ * hexadecimal digits. an MD5 sum is 16 bytes long.
+ * each byte is represented by two heaxadecimal
+ * characters. you thus need to provide an array
+ * of 33 characters, including the trailing '\0'.
+ *
+ * RETURNS 0 on failure (out of memory for internal buffers) or
+ * non-zero on success.
+ *
+ * STANDARDS MD5 is described in RFC 1321.
+ *
+ * AUTHOR Sverre H. Huseby <sverrehu@online.no>
+ *
+ */
+bool
+md5_hash(const void *buff, size_t len, char *hexsum)
+{
+ unsigned8 sum[16];
+
+ if (!calculateDigestFromBuffer((unsigned8 *) buff, len, sum))
+ return false;
+
+ bytesToHex(sum, hexsum);
+ return true;
+}
+
+
+
+/*
+ * puts md5(username+passwd) in buf provided buflen is at least 36 bytes
+ * returns 1 on success, 0 on any kind of failure and sets errno accordingly
+ */
+bool EncryptMD5(const char *passwd, const char *salt, char *buf)
+{
+ char crypt_buf[128];
+
+ if (strlen(salt) + strlen(passwd) > 127)
+ return false;
+
+ strcpy(buf, "md5");
+ memset(crypt_buf, 0, 128);
+ sprintf(crypt_buf,"%s%s", salt, passwd);
+
+ return md5_hash(crypt_buf, strlen(crypt_buf), buf + 3);
+}
diff --git a/src/include/libpq/md5.h b/src/include/libpq/md5.h
new file mode 100644
index 00000000000..c30ad0ce61a
--- /dev/null
+++ b/src/include/libpq/md5.h
@@ -0,0 +1,21 @@
+/*-------------------------------------------------------------------------
+ *
+ * md5.h
+ * Interface to hba.c
+ *
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_MD5_H
+#define PG_MD5_H
+
+extern bool md5_hash(const void *buff, size_t len, char *hexsum);
+extern bool CheckMD5Pwd(char *passwd, char *storedpwd, char *seed);
+extern bool EncryptMD5(const char *passwd, const char *salt, char *buf);
+
+#define MD5_PASSWD_LEN 35
+
+#define isMD5(passwd) (strncmp((passwd),"md5",3) == 0 && \
+ strlen(passwd) == MD5_PASSWD_LEN)
+
+#endif
--
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