Replace RSA-derived md5 code with code derived from Colin Plumb's PD version.

This moves md5.c out of libkern and into sys/crypto where it belongs (as
requested by markus@).  Note that md5.c is still mandatory (dev/rnd.c uses it).
Verified with IPsec + hmac-md5 and tcp md5sig. OK henning@ and hshoexer@

1 files changed, 40 insertions, 0 deletions

diff --git a/sys/crypto/md5.h b/sys/crypto/md5.h
new file mode 100644
index 00000000000..b629c3e81bd
--- /dev/null
+++ b/sys/crypto/md5.h
@@ -0,0 +1,40 @@
+/*	$OpenBSD: md5.h,v 1.1 2004/05/07 14:42:26 millert Exp $	*/
+
+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest.  This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ */
+
+#ifndef _MD5_H_
+#define _MD5_H_
+
+#define	MD5_BLOCK_LENGTH		64
+#define	MD5_DIGEST_LENGTH		16
+
+typedef struct MD5Context {
+	u_int32_t state[4];			/* state */
+	u_int64_t count;			/* number of bits, mod 2^64 */
+	u_int8_t buffer[MD5_BLOCK_LENGTH];	/* input buffer */
+} MD5_CTX;
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+void	 MD5Init(MD5_CTX *);
+void	 MD5Update(MD5_CTX *, const u_int8_t *, size_t)
+		__attribute__((__bounded__(__string__,2,3)));
+void	 MD5Final(u_int8_t [MD5_DIGEST_LENGTH], MD5_CTX *)
+		__attribute__((__bounded__(__minbytes__,1,MD5_DIGEST_LENGTH)));
+void	 MD5Transform(u_int32_t [4], const u_int8_t [MD5_BLOCK_LENGTH])
+		__attribute__((__bounded__(__minbytes__,1,4)))
+		__attribute__((__bounded__(__minbytes__,2,MD5_BLOCK_LENGTH)));
+__END_DECLS
+
+#endif /* _MD5_H_ */