From feab97555dcb12a4f1579d9dc29f53b6318b6188 Mon Sep 17 00:00:00 2001
From: Thomas Roessler <roessler@does-not-exist.org>
Date: Tue, 29 May 2001 20:26:21 +0000
Subject: GSSAPI fixes, tunnel driver.  From Brendan Cully.

---
 m4/gssapi.m4 | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 m4/gssapi.m4

(limited to 'm4')

diff --git a/m4/gssapi.m4 b/m4/gssapi.m4
new file mode 100644
index 00000000..31382157
--- /dev/null
+++ b/m4/gssapi.m4
@@ -0,0 +1,73 @@
+# gssapi.m4: Find GSSAPI libraries in either Heimdal or MIT implementations
+# Brendan Cully <brendan@kublai.com> 20010529
+
+dnl MUTT_AM_PATH_GSSAPI(PREFIX)
+dnl Search for a GSSAPI implementation in the standard locations plus PREFIX,
+dnl if it is set and not "yes".
+dnl Defines GSSAPI_CFLAGS and GSSAPI_LIBS if found.
+dnl Defines GSSAPI_IMPL to "Heimdal", "MIT", or "OldMIT", or "none" if not found
+AC_DEFUN(MUTT_AM_PATH_GSSAPI,
+[
+  GSSAPI_PREFIX=[$]$1
+  GSSAPI_IMPL="none"
+  dnl First try krb5-config
+  if test "$GSSAPI_PREFIX" != "yes"
+  then
+    krb5_path="$GSSAPI_PREFIX/bin"
+  else
+    krb5_path="$PATH"
+  fi
+  AC_PATH_PROG(KRB5CFGPATH, krb5-config, none, $krb5_path)
+  if test "$KRB5CFGPATH" != "none"
+  then
+    GSSAPI_CFLAGS="$CPPFLAGS `$KRB5CFGPATH --cflags gssapi`"
+    GSSAPI_LIBS="$MUTTLIBS `$KRB5CFGPATH --libs gssapi`"
+    GSSAPI_IMPL="Heimdal"
+  else
+    dnl No krb5-config, run the old code
+    saved_CPPFLAGS="$CPPFLAGS"
+    saved_LDFLAGS="$LDFLAGS"
+    saved_LIBS="$LIBS"
+    if test "$GSSAPI_PREFIX" != "yes"
+    then
+      GSSAPI_CFLAGS="-I$GSSAPI_PREFIX/include"
+      GSSAPI_LDFLAGS="-L$GSSAPI_PREFIX/lib"
+      CPPFLAGS="$CPPFLAGS $GSSAPI_CFLAGS"
+      LDFLAGS="$LDFLAGS $GSSAPI_LDFLAGS"
+    fi
+
+    dnl New MIT kerberos V support
+    AC_CHECK_LIB(gssapi_krb5, gss_init_sec_context, [
+      GSSAPI_IMPL="MIT",
+      GSSAPI_LIBS="$GSSAPI_LDFLAGS -lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err"
+      ],, -lkrb5 -lk5crypto -lcom_err)
+
+    dnl Heimdal kerberos V support
+    if test "$GSSAPI_IMPL" = "none"
+    then
+      AC_CHECK_LIB(gssapi, gss_init_sec_context, [
+          GSSAPI_IMPL="Heimdal"
+          GSSAPI_LIBS="$GSSAPI_LDFLAGS -lgssapi -lkrb5 -ldes -lasn1 -lroken"
+          GSSAPI_LIBS="$GSSAPI_LIBS -lcrypt -lcom_err"
+          ],, -lkrb5 -ldes -lasn1 -lroken -lcrypt -lcom_err)
+    fi
+
+    dnl Old MIT Kerberos V
+    dnl Note: older krb5 distributions use -lcrypto instead of
+    dnl -lk5crypto, which collides with OpenSSL.  One way of dealing
+    dnl with that is to extract all objects from krb5's libcrypto
+    dnl and from openssl's libcrypto into the same directory, then
+    dnl to create a new libcrypto from these.
+    if test "$GSSAPI_IMPL" = "none"
+    then
+      AC_CHECK_LIB(gssapi_krb5, g_order_init, [
+        GSSAPI_IMPL="OldMIT",
+        GSSAPI_LIBS="$GSSAPI_LDFLAGS -lgssapi_krb5 -lkrb5 -lcrypto -lcom_err"
+        ],, -lkrb5 -lcrypto -lcom_err)
+    fi
+  fi
+
+  CPPFLAGS="$saved_CPPFLAGS"
+  LDFLAGS="$saved_LDFLAGS"
+  LIBS="$saved_LIBS"
+])
\ No newline at end of file
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