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      1 /*	$NetBSD: ntp_md5.h,v 1.10 2024/08/18 20:46:50 christos Exp $	*/
      2 
      3 /*
      4  * ntp_md5.h: deal with md5.h headers
      5  *
      6  * Use the system MD5 if available, otherwise libisc's.
      7  */
      8 #ifndef NTP_MD5_H
      9 #define NTP_MD5_H
     10 
     11 /* Use the system MD5 or fall back on libisc's */
     12 # if defined HAVE_MD5_H && defined HAVE_MD5INIT
     13 #  include <md5.h>
     14 # else
     15 #  include "isc/md5.h"
     16    typedef isc_md5_t		MD5_CTX;
     17 #  define MD5_DIGEST_LENGTH	ISC_MD5_DIGESTLENGTH
     18 #  define MD5Init(c)		isc_md5_init(c)
     19 #  define MD5Update(c, p, s)	isc_md5_update(c, (const void *)p, s)
     20 #  define MD5Final(d, c)	isc_md5_final((c), (d))	/* swapped */
     21 # endif
     22 
     23 # define KEY_TYPE_MD5			NID_md5
     24 
     25 #ifdef OPENSSL
     26 # include <openssl/evp.h>
     27 # include "libssl_compat.h"
     28 # ifdef HAVE_OPENSSL_CMAC_H
     29 #  include <openssl/cmac.h>
     30 #  define CMAC                  "AES128CMAC"
     31 #  define AES_128_KEY_SIZE      16
     32 # endif /*HAVE_OPENSSL_CMAC_H*/
     33 #else	/* !OPENSSL follows */
     34 /*
     35  * Provide OpenSSL-alike MD5 API if we're not using OpenSSL
     36  */
     37 
     38   typedef MD5_CTX			EVP_MD_CTX;
     39 
     40 # define NID_md5			4	/* from openssl/objects.h */
     41 # define EVP_MAX_MD_SIZE		MD5_DIGEST_LENGTH
     42 # define EVP_MD_CTX_free(c)		free(c)
     43 # define EVP_MD_CTX_new()		calloc(1, sizeof(MD5_CTX))
     44 # define EVP_get_digestbynid(t)		NULL
     45 # define EVP_md5()			NULL
     46 # define EVP_MD_CTX_init(c)
     47 # define EVP_MD_CTX_set_flags(c, f)
     48 # define EVP_DigestInit(c, dt)		(MD5Init(c), (dt ? 1 : 1))
     49 # define EVP_DigestInit_ex(c, dt, i)	(MD5Init(c), (dt ? 1 : 1))
     50 # define EVP_DigestUpdate(c, p, s)	MD5Update(c, (const void *)(p), \
     51 						  s)
     52 # define EVP_DigestFinal(c, d, pdl)	\
     53 	do {				\
     54 		MD5Final((d), (c));	\
     55 		*(pdl) = MD5_LENGTH;	\
     56 	} while (0)
     57 # endif	/* !OPENSSL */
     58 #endif	/* NTP_MD5_H */
     59