1 files changed, 122 insertions, 0 deletions
diff --git a/lib/libcrypt/crypt-shs.c b/lib/libcrypt/crypt-shs.c
new file mode 100644
index 0000000..5f8384c
--- /dev/null
+++ b/lib/libcrypt/crypt-shs.c
@@ -0,0 +1,122 @@
+/*
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * <phk@login.dknet.dk> wrote this file.  As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you think
+ * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
+ * ----------------------------------------------------------------------------
+ *
+ * $FreeBSD$
+ *
+ */
+
+/*
+// Integrated SHA-1 crypt using PHK's MD5 code base.
+*/
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char rcsid[] = "$Header: /home/ncvs/src/lib/libcrypt/crypt.c,v 1.4 1996/07/12 18:56:01 jkh Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include "crypt.h"
+
+char *
+crypt_shs(pw, pl, sp, sl, passwd, token)
+	register const unsigned char *pw;
+        const unsigned int pl;
+	register const unsigned char *sp;
+        const unsigned int sl;
+        char * passwd;
+        char * token;
+{
+        char *p;
+	unsigned char	final[_SHS_SIZE];
+	int i,j;
+	SHS_CTX	ctx,ctx1;
+	unsigned long l;
+
+	shsInit(&ctx);
+
+	/* The password first, since that is what is most unknown */
+	shsUpdate(&ctx,pw,pl);
+
+	/* Then our magic string */
+	shsUpdate(&ctx,(unsigned char *)token, strlen(token));
+
+	/* Then the raw salt */
+	shsUpdate(&ctx,sp,sl);
+
+	/* Then just as many characters of the shs(pw,salt,pw) */
+	shsInit(&ctx1);
+	shsUpdate(&ctx1,pw,pl);
+	shsUpdate(&ctx1,sp,sl);
+	shsUpdate(&ctx1,pw,pl);
+	shsFinal(&ctx1,final);
+	for(i = pl; i > 0; i -= _SHS_SIZE)
+		shsUpdate(&ctx,final,i>_SHS_SIZE ? _SHS_SIZE : i);
+
+	/* Don't leave anything around in vm they could use. */
+	memset(final,0,sizeof final);
+
+	/* Then something really weird... */
+	for (j=0,i = pl; i ; i >>= 1)
+		if(i&1)
+		    shsUpdate(&ctx, final+j, 1);
+		else
+		    shsUpdate(&ctx, pw+j, 1);
+
+	/* Now make the output string */
+	strcpy(passwd, token);
+	strncat(passwd, (char *)sp, (int)sl);
+	strcat(passwd, "$");
+
+	shsFinal(&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++) {
+		shsInit(&ctx1);
+		if(i & 1)
+			shsUpdate(&ctx1,pw,pl);
+		else
+			shsUpdate(&ctx1,final,_SHS_SIZE);
+
+		if(i % 3)
+			shsUpdate(&ctx1,sp,sl);
+
+		if(i % 7)
+			shsUpdate(&ctx1,pw,pl);
+
+		if(i & 1)
+			shsUpdate(&ctx1,final,_SHS_SIZE);
+		else
+			shsUpdate(&ctx1,pw,pl);
+		shsFinal(&ctx1,final);
+	}
+
+	p = passwd + strlen(passwd);
+
+	l = (final[ 0]<<16) | (final[ 6]<<8) | final[12]; to64(p,l,4); p += 4;
+	l = (final[ 1]<<16) | (final[ 7]<<8) | final[13]; to64(p,l,4); p += 4;
+	l = (final[ 2]<<16) | (final[ 8]<<8) | final[14]; to64(p,l,4); p += 4;
+	l = (final[ 3]<<16) | (final[ 9]<<8) | final[15]; to64(p,l,4); p += 4;
+	l = (final[ 4]<<16) | (final[10]<<8) | final[16]; to64(p,l,4); p += 4;
+	l = (final[ 5]<<16) | (final[11]<<8) | final[17]; to64(p,l,4); p += 4;
+	l =                   (final[18]<<8) | final[19]; to64(p,l,3); p += 3;
+
+	*p = '\0';
+
+	/* Don't leave anything around in vm they could use. */
+	memset(final,0,sizeof final);
+
+	return passwd;
+}
+