/*      $OpenBSD: md5.h,v 1.17 2012/12/05 23:19:57 deraadt 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_

#ifndef WITH_OPENSSL

#define MD5_BLOCK_LENGTH                64
#define MD5_DIGEST_LENGTH               16
#define MD5_DIGEST_STRING_LENGTH        (MD5_DIGEST_LENGTH * 2 + 1)

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;

void     MD5Init(MD5_CTX *);
void     MD5Update(MD5_CTX *, const u_int8_t *, size_t)
                __attribute__((__bounded__(__string__,2,3)));
void     MD5Pad(MD5_CTX *);
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)));
char    *MD5End(MD5_CTX *, char *)
                __attribute__((__bounded__(__minbytes__,2,MD5_DIGEST_STRING_LENGTH)));
char    *MD5File(const char *, char *)
                __attribute__((__bounded__(__minbytes__,2,MD5_DIGEST_STRING_LENGTH)));
char    *MD5FileChunk(const char *, char *, off_t, off_t)
                __attribute__((__bounded__(__minbytes__,2,MD5_DIGEST_STRING_LENGTH)));
char    *MD5Data(const u_int8_t *, size_t, char *)
                __attribute__((__bounded__(__string__,1,2)))
                __attribute__((__bounded__(__minbytes__,3,MD5_DIGEST_STRING_LENGTH)));

#endif /* !WITH_OPENSSL */

#endif /* _MD5_H_ */