cf/crypto.m4

   1 dnl $Id$
   2 dnl
   3 dnl test for crypto libraries:
   4 dnl - libcrypto (from openssl)
   5 dnl - libdes (from krb4)
   6 dnl - own-built libdes
   7
   8 m4_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                 ])
  40 m4_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
  57 AC_DEFUN([KRB_CRYPTO],[
  58 crypto_lib=unknown
  59 AC_WITH_ALL([openssl])
  60
  61 DIR_des=
  62
  63 AC_MSG_CHECKING([for crypto library])
  64
  65 openssl=no
  66 old_hash=no
  67
  68 if 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
 119 fi
 120
 121 if 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"
 150 fi
 151
 152 if 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
 162 fi
 163
 164 if test "$with_krb4" != no -a "$crypto_lib" != krb4; then
 165         AC_MSG_ERROR([the crypto library used by krb4 lacks features
 166 required by Kerberos 5; to continue, you need to install a newer
 167 Kerberos 4 or configure --without-krb4])
 168 fi
 169
 170 if test "$openssl" = "yes"; then
 171   AC_DEFINE([HAVE_OPENSSL], 1, [define to use openssl's libcrypto])
 172 fi
 173 if test "$old_hash" = yes; then
 174   AC_DEFINE([HAVE_OLD_HASH_NAMES], 1,
 175                 [define if you have hash functions like md4_finito()])
 176 fi
 177 AM_CONDITIONAL(HAVE_OPENSSL, test "$openssl" = yes)dnl
 178
 179 AC_SUBST(DIR_des)
 180 AC_SUBST(INCLUDE_des)
 181 AC_SUBST(LIB_des)
 182 AC_SUBST(LIB_des_a)
 183 AC_SUBST(LIB_des_so)
 184 AC_SUBST(LIB_des_appl)
 185 ])