Adding upstream version 13.4.upstream/13.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 169 insertions, 0 deletions

diff --git a/contrib/pgcrypto/crypt-md5.c b/contrib/pgcrypto/crypt-md5.c
new file mode 100644
index 0000000..d38721a
--- /dev/null
+++ b/contrib/pgcrypto/crypt-md5.c
@@ -0,0 +1,169 @@
+/*
+ * File imported from FreeBSD, original by Poul-Henning Kamp.
+ *
+ * $FreeBSD: src/lib/libcrypt/crypt-md5.c,v 1.5 1999/12/17 20:21:45 peter Exp $
+ *
+ * contrib/pgcrypto/crypt-md5.c
+ */
+
+#include "postgres.h"
+
+#include "px-crypt.h"
+#include "px.h"
+
+#define MD5_SIZE 16
+
+static const char _crypt_a64[] =
+"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+static void
+_crypt_to64(char *s, unsigned long v, int n)
+{
+	while (--n >= 0)
+	{
+		*s++ = _crypt_a64[v & 0x3f];
+		v >>= 6;
+	}
+}
+
+/*
+ * UNIX password
+ */
+
+char *
+px_crypt_md5(const char *pw, const char *salt, char *passwd, unsigned dstlen)
+{
+	static char *magic = "$1$"; /* This string is magic for this algorithm.
+								 * Having it this way, we can get better later
+								 * on */
+	static char *p;
+	static const char *sp,
+			   *ep;
+	unsigned char final[MD5_SIZE];
+	int			sl,
+				pl,
+				i;
+	PX_MD	   *ctx,
+			   *ctx1;
+	int			err;
+	unsigned long l;
+
+	if (!passwd || dstlen < 120)
+		return NULL;
+
+	/* Refine the Salt first */
+	sp = salt;
+
+	/* If it starts with the magic string, then skip that */
+	if (strncmp(sp, magic, strlen(magic)) == 0)
+		sp += strlen(magic);
+
+	/* It stops at the first '$', max 8 chars */
+	for (ep = sp; *ep && *ep != '$' && ep < (sp + 8); ep++)
+		continue;
+
+	/* get the length of the true salt */
+	sl = ep - sp;
+
+	/* we need two PX_MD objects */
+	err = px_find_digest("md5", &ctx);
+	if (err)
+		return NULL;
+	err = px_find_digest("md5", &ctx1);
+	if (err)
+	{
+		/* this path is possible under low-memory circumstances */
+		px_md_free(ctx);
+		return NULL;
+	}
+
+	/* The password first, since that is what is most unknown */
+	px_md_update(ctx, (const uint8 *) pw, strlen(pw));
+
+	/* Then our magic string */
+	px_md_update(ctx, (uint8 *) magic, strlen(magic));
+
+	/* Then the raw salt */
+	px_md_update(ctx, (const uint8 *) sp, sl);
+
+	/* Then just as many characters of the MD5(pw,salt,pw) */
+	px_md_update(ctx1, (const uint8 *) pw, strlen(pw));
+	px_md_update(ctx1, (const uint8 *) sp, sl);
+	px_md_update(ctx1, (const uint8 *) pw, strlen(pw));
+	px_md_finish(ctx1, final);
+	for (pl = strlen(pw); pl > 0; pl -= MD5_SIZE)
+		px_md_update(ctx, final, pl > MD5_SIZE ? MD5_SIZE : pl);
+
+	/* Don't leave anything around in vm they could use. */
+	px_memset(final, 0, sizeof final);
+
+	/* Then something really weird... */
+	for (i = strlen(pw); i; i >>= 1)
+		if (i & 1)
+			px_md_update(ctx, final, 1);
+		else
+			px_md_update(ctx, (const uint8 *) pw, 1);
+
+	/* Now make the output string */
+	strcpy(passwd, magic);
+	strncat(passwd, sp, sl);
+	strcat(passwd, "$");
+
+	px_md_finish(ctx, final);
+
+	/*
+	 * and now, just to make sure things don't run too fast On a 60 Mhz
+	 * Pentium this takes 34 msec, so you would need 30 seconds to build a
+	 * 1000 entry dictionary...
+	 */
+	for (i = 0; i < 1000; i++)
+	{
+		px_md_reset(ctx1);
+		if (i & 1)
+			px_md_update(ctx1, (const uint8 *) pw, strlen(pw));
+		else
+			px_md_update(ctx1, final, MD5_SIZE);
+
+		if (i % 3)
+			px_md_update(ctx1, (const uint8 *) sp, sl);
+
+		if (i % 7)
+			px_md_update(ctx1, (const uint8 *) pw, strlen(pw));
+
+		if (i & 1)
+			px_md_update(ctx1, final, MD5_SIZE);
+		else
+			px_md_update(ctx1, (const uint8 *) pw, strlen(pw));
+		px_md_finish(ctx1, final);
+	}
+
+	p = passwd + strlen(passwd);
+
+	l = (final[0] << 16) | (final[6] << 8) | final[12];
+	_crypt_to64(p, l, 4);
+	p += 4;
+	l = (final[1] << 16) | (final[7] << 8) | final[13];
+	_crypt_to64(p, l, 4);
+	p += 4;
+	l = (final[2] << 16) | (final[8] << 8) | final[14];
+	_crypt_to64(p, l, 4);
+	p += 4;
+	l = (final[3] << 16) | (final[9] << 8) | final[15];
+	_crypt_to64(p, l, 4);
+	p += 4;
+	l = (final[4] << 16) | (final[10] << 8) | final[5];
+	_crypt_to64(p, l, 4);
+	p += 4;
+	l = final[11];
+	_crypt_to64(p, l, 2);
+	p += 2;
+	*p = '\0';
+
+	/* Don't leave anything around in vm they could use. */
+	px_memset(final, 0, sizeof final);
+
+	px_md_free(ctx1);
+	px_md_free(ctx);
+
+	return passwd;
+}