crypto.m4 revision 120945 
1dnl $Id: crypto.m4,v 1.16.2.1 2003/05/05 20:08:32 joda Exp $
2dnl
3dnl test for crypto libraries:
4dnl - libcrypto (from openssl)
5dnl - libdes (from krb4)
6dnl - own-built libdes
7
8m4_define([test_headers], [
9		#undef KRB5 /* makes md4.h et al unhappy */
10		#ifdef HAVE_OPENSSL
11		#include <openssl/md4.h>
12		#include <openssl/md5.h>
13		#include <openssl/sha.h>
14		#define OPENSSL_DES_LIBDES_COMPATIBILITY
15		#include <openssl/des.h>
16		#include <openssl/rc4.h>
17		#include <openssl/rand.h>
18		#else
19		#include <md4.h>
20		#include <md5.h>
21		#include <sha.h>
22		#include <des.h>
23		#include <rc4.h>
24		#endif
25		#ifdef OLD_HASH_NAMES
26		typedef struct md4 MD4_CTX;
27		#define MD4_Init(C) md4_init((C))
28		#define MD4_Update(C, D, L) md4_update((C), (D), (L))
29		#define MD4_Final(D, C) md4_finito((C), (D))
30		typedef struct md5 MD5_CTX;
31		#define MD5_Init(C) md5_init((C))
32		#define MD5_Update(C, D, L) md5_update((C), (D), (L))
33		#define MD5_Final(D, C) md5_finito((C), (D))
34		typedef struct sha SHA_CTX;
35		#define SHA1_Init(C) sha_init((C))
36		#define SHA1_Update(C, D, L) sha_update((C), (D), (L))
37		#define SHA1_Final(D, C) sha_finito((C), (D))
38		#endif
39		])
40m4_define([test_body], [
41		void *schedule = 0;
42		MD4_CTX md4;
43		MD5_CTX md5;
44		SHA_CTX sha1;
45
46		MD4_Init(&md4);
47		MD5_Init(&md5);
48		SHA1_Init(&sha1);
49		#ifdef HAVE_OPENSSL
50		RAND_status();
51		#endif
52
53		des_cbc_encrypt(0, 0, 0, schedule, 0, 0);
54		RC4(0, 0, 0, 0);])
55
56
57AC_DEFUN([KRB_CRYPTO],[
58crypto_lib=unknown
59AC_WITH_ALL([openssl])
60
61DIR_des=
62
63AC_MSG_CHECKING([for crypto library])
64
65openssl=no
66old_hash=no
67
68if test "$crypto_lib" = "unknown" -a "$with_krb4" != "no"; then
69	save_CPPFLAGS="$CPPFLAGS"
70	save_LIBS="$LIBS"
71
72	cdirs= clibs=
73	for i in $LIB_krb4; do
74		case "$i" in
75		-L*) cdirs="$cdirs $i";;
76		-l*) clibs="$clibs $i";;
77		esac
78	done
79
80	ires=
81	for i in $INCLUDE_krb4; do
82		CFLAGS="-DHAVE_OPENSSL $i $save_CFLAGS"
83		for j in $cdirs; do
84			for k in $clibs; do
85				LIBS="$j $k $save_LIBS"
86				AC_TRY_LINK(test_headers, test_body,
87					openssl=yes ires="$i" lres="$j $k"; break 3)
88			done
89		done
90		CFLAGS="$i $save_CFLAGS"
91		for j in $cdirs; do
92			for k in $clibs; do
93				LIBS="$j $k $save_LIBS"
94				AC_TRY_LINK(test_headers, test_body,
95					openssl=no ires="$i" lres="$j $k"; break 3)
96			done
97		done
98		CFLAGS="-DHAVE_OLD_HASH_NAMES $i $save_CFLAGS"
99		for j in $cdirs; do
100			for k in $clibs; do
101				LIBS="$j $k $save_LIBS"
102				AC_TRY_LINK(test_headers, test_body,
103					openssl=no ires="$i" lres="$j $k"; break 3)
104			done
105		done
106	done
107		
108	CFLAGS="$save_CFLAGS"
109	LIBS="$save_LIBS"
110	if test "$ires" -a "$lres"; then
111		INCLUDE_des="$ires"
112		LIB_des="$lres"
113		crypto_lib=krb4
114		AC_MSG_RESULT([same as krb4])
115		LIB_des_a='$(LIB_des)'
116		LIB_des_so='$(LIB_des)'
117		LIB_des_appl='$(LIB_des)'
118	fi
119fi
120
121if test "$crypto_lib" = "unknown" -a "$with_openssl" != "no"; then
122	save_CFLAGS="$CFLAGS"
123	save_LIBS="$LIBS"
124	INCLUDE_des=
125	LIB_des=
126	if test "$with_openssl_include" != ""; then
127		INCLUDE_des="-I${with_openssl_include}"
128	fi
129	if test "$with_openssl_lib" != ""; then
130		LIB_des="-L${with_openssl_lib}"
131	fi
132	CFLAGS="-DHAVE_OPENSSL ${INCLUDE_des} ${CFLAGS}"
133	saved_LIB_des="$LIB_des"
134	for lres in "" "-lnsl -lsocket"; do
135		LIB_des="${saved_LIB_des} -lcrypto $lres"
136		LIB_des_a="$LIB_des"
137		LIB_des_so="$LIB_des"
138		LIB_des_appl="$LIB_des"
139		LIBS="${LIBS} ${LIB_des}"
140		AC_TRY_LINK(test_headers, test_body, [
141			crypto_lib=libcrypto openssl=yes
142			AC_MSG_RESULT([libcrypto])
143		])
144		if test "$crypto_lib" = libcrypto ; then
145			break;
146		fi
147	done
148	CFLAGS="$save_CFLAGS"
149	LIBS="$save_LIBS"
150fi
151
152if test "$crypto_lib" = "unknown"; then
153
154  DIR_des='des'
155  LIB_des='$(top_builddir)/lib/des/libdes.la'
156  LIB_des_a='$(top_builddir)/lib/des/.libs/libdes.a'
157  LIB_des_so='$(top_builddir)/lib/des/.libs/libdes.so'
158  LIB_des_appl="-ldes"
159
160  AC_MSG_RESULT([included libdes])
161
162fi
163
164if test "$with_krb4" != no -a "$crypto_lib" != krb4; then
165	AC_MSG_ERROR([the crypto library used by krb4 lacks features
166required by Kerberos 5; to continue, you need to install a newer 
167Kerberos 4 or configure --without-krb4])
168fi
169
170if test "$openssl" = "yes"; then
171  AC_DEFINE([HAVE_OPENSSL], 1, [define to use openssl's libcrypto])
172fi
173if test "$old_hash" = yes; then
174  AC_DEFINE([HAVE_OLD_HASH_NAMES], 1,
175		[define if you have hash functions like md4_finito()])
176fi
177AM_CONDITIONAL(HAVE_OPENSSL, test "$openssl" = yes)dnl
178
179AC_SUBST(DIR_des)
180AC_SUBST(INCLUDE_des)
181AC_SUBST(LIB_des)
182AC_SUBST(LIB_des_a)
183AC_SUBST(LIB_des_so)
184AC_SUBST(LIB_des_appl)
185])
186