xref: /freebsd/contrib/ntp/include/ntp_md5.h (revision 5515e8874a8d85a8d961fca64c494dfc1bea4bd0)
1 /*
2  * ntp_md5.h: deal with md5.h headers
3  *
4  * Use the system MD5 if available, otherwise libisc's.
5  */
6 #ifndef NTP_MD5_H
7 #define NTP_MD5_H
8 
9 /* Use the system MD5 or fall back on libisc's */
10 # if defined HAVE_MD5_H && defined HAVE_MD5INIT
11 #  include <md5.h>
12 # else
13 #  include "isc/md5.h"
14    typedef isc_md5_t		MD5_CTX;
15 #  define MD5_DIGEST_LENGTH	ISC_MD5_DIGESTLENGTH
16 #  define MD5Init(c)		isc_md5_init(c)
17 #  define MD5Update(c, p, s)	isc_md5_update(c, (const void *)p, s)
18 #  define MD5Final(d, c)	isc_md5_final((c), (d))	/* swapped */
19 # endif
20 
21 # define KEY_TYPE_MD5			NID_md5
22 
23 #ifdef OPENSSL
24 # include <openssl/evp.h>
25 # include "libssl_compat.h"
26 # ifdef HAVE_OPENSSL_CMAC_H
27 #  include <openssl/cmac.h>
28 #  define CMAC                  "AES128CMAC"
29 #  define AES_128_KEY_SIZE      16
30 # endif /*HAVE_OPENSSL_CMAC_H*/
31 #else	/* !OPENSSL follows */
32 /*
33  * Provide OpenSSL-alike MD5 API if we're not using OpenSSL
34  */
35 
36   typedef MD5_CTX			EVP_MD_CTX;
37 
38 # define NID_md5			4	/* from openssl/objects.h */
39 # define EVP_MAX_MD_SIZE		MD5_DIGEST_LENGTH
40 # define EVP_MD_CTX_free(c)		free(c)
41 # define EVP_MD_CTX_new()		calloc(1, sizeof(MD5_CTX))
42 # define EVP_get_digestbynid(t)		NULL
43 # define EVP_md5()			NULL
44 # define EVP_MD_CTX_init(c)
45 # define EVP_MD_CTX_set_flags(c, f)
46 # define EVP_DigestInit(c, dt)		(MD5Init(c), 1)
47 # define EVP_DigestInit_ex(c, dt, i)	(MD5Init(c), 1)
48 # define EVP_DigestUpdate(c, p, s)	MD5Update(c, (const void *)(p), \
49 						  s)
50 # define EVP_DigestFinal(c, d, pdl)	\
51 	do {				\
52 		MD5Final((d), (c));	\
53 		*(pdl) = MD5_LENGTH;	\
54 	} while (0)
55 # endif	/* !OPENSSL */
56 #endif	/* NTP_MD5_H */
57