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git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@389 dc483132-0cff-0310-8789-dd5450dbe970

diff --git a/src/lib/krb5/krb/faddr_ordr.c b/src/lib/krb5/krb/faddr_ordr.c
new file mode 100644 (file)
index 0000000..2139f3b
--- /dev/null
+++ b/src/lib/krb5/krb/faddr_ordr.c
@@ -0,0 +1,55 @@
+/*
+ * $Source$
+ * $Author$
+ *
+ * Copyright 1990 by the Massachusetts Institute of Technology.
+ *
+ * For copying and distribution information, please see the file
+ * <krb5/mit-copyright.h>.
+ *
+ * krb5_fulladdr_order()
+ */
+
+#if !defined(lint) && !defined(SABER)
+static char addr_comp_c[] =
+"$Id$";
+#endif /* !lint & !SABER */
+
+#include <krb5/copyright.h>
+#include <krb5/krb5.h>
+#include <krb5/ext-proto.h>
+
+#ifndef min
+#define min(a,b) ((a) > (b) ? (a) : (b))
+#endif
+
+/*
+ * Return an ordering on the two full addresses:  0 if the same,
+ * < 0 if first is less than 2nd, > 0 if first is greater than 2nd.
+ */
+int
+krb5_fulladdr_order(addr1, addr2)
+krb5_fulladdr *addr1, *addr2;
+{
+    int dir;
+    dir = addr1->address->addrtype - addr2->address->addrtype;
+    if (dir)
+       return(dir);
+
+    dir = addr1->address->length - addr2->address->length;
+    if (dir)
+       return(dir);
+
+    dir = bcmp((char *)addr1->address->contents,
+              (char *)addr2->address->contents,
+              min(addr1->address->length, addr2->address->length));
+    if (dir)
+       return(dir);
+
+    if (addr1->port > addr2->port)
+       return(1);
+    else if (addr1->port < addr2->port)
+       return(-1);
+    else
+       return(0);
+}

diff --git a/src/lib/krb5/krb/mk_safe.c b/src/lib/krb5/krb/mk_safe.c
new file mode 100644 (file)
index 0000000..7ff5d40
--- /dev/null
+++ b/src/lib/krb5/krb/mk_safe.c
@@ -0,0 +1,116 @@
+/*
+ * $Source$
+ * $Author$
+ *
+ * Copyright 1990 by the Massachusetts Institute of Technology.
+ *
+ * For copying and distribution information, please see the file
+ * <krb5/mit-copyright.h>.
+ *
+ * krb5_mk_safe()
+ */
+
+#if !defined(lint) && !defined(SABER)
+static char mk_safe_c[] =
+"$Id$";
+#endif /* !lint & !SABER */
+
+#include <krb5/copyright.h>
+#include <krb5/krb5.h>
+#include <krb5/krb5_err.h>
+
+#include <krb5/asn1.h>
+#include <stdio.h>
+#include <krb5/libos-proto.h>
+#include <krb5/ext-proto.h>
+
+/*
+ Formats a KRB_SAFE message into outbuf.
+
+ userdata is formatted as the user data in the message.
+ sumtype specifies the encryption type; key specifies the key which
+ might be used to seed the checksum; sender_addr and recv_addr specify
+ the full addresses (host and port) of the sender and receiver.
+ The host portion of sender_addr is used to form the addresses used in the
+ KRB_SAFE message.
+
+ The outbuf buffer storage is allocated, and should be freed by the
+ caller when finished.
+
+ returns system errors
+*/
+krb5_error_code
+krb5_mk_safe(DECLARG(krb5_data *, userdata),
+            DECLARG(krb5_cksumtype, sumtype),
+            DECLARG(krb5_keyblock *, key),
+            DECLARG(krb5_fulladdr *, sender_addr),
+            DECLARG(krb5_fulladdr *, recv_addr),
+            DECLARG(krb5_data *, outbuf))
+OLDDECLARG(krb5_data *, userdata)
+OLDDECLARG(krb5_cksumtype, sumtype)
+OLDDECLARG(krb5_keyblock *, key)
+OLDDECLARG(krb5_fulladdr *, sender_addr)
+OLDDECLARG(krb5_fulladdr *, recv_addr)
+OLDDECLARG(krb5_data *, outbuf)
+{
+    krb5_error_code retval;
+    krb5_safe safemsg;
+    krb5_address *addrs[2];
+    krb5_octet zero_octet = 0;
+    krb5_checksum safe_checksum;
+    krb5_data *scratch;
+
+    if (!valid_cksumtype(sumtype))
+       return KRB5KDC_ERR_ETYPE_NOSUPP; /* XXX */
+
+    addrs[0] = sender_addr->address;
+    addrs[1] = 0;
+
+    safemsg.user_data = *userdata;
+    safemsg.addresses = addrs;
+
+    if (retval = krb5_ms_timeofday(&safemsg.timestamp, &safemsg.msec))
+       return retval;
+
+    if (krb5_fulladdr_order(sender_addr, recv_addr) > 0)
+       safemsg.msec = (safemsg.msec & MSEC_VAL_MASK) | MSEC_DIRBIT;
+    else
+       /* this should be a no-op, but just to be sure... */
+       safemsg.msec = safemsg.msec & MSEC_VAL_MASK;
+
+    /* to do the checksum stuff, we need to encode the message with a
+       zero-length zero-type checksum, then checksum the encoding, then
+       re-encode with the 
+       checksum. */
+
+    safe_checksum.checksum_type = 0;
+    safe_checksum.length = 0;
+    safe_checksum.contents = &zero_octet;
+
+    safemsg.checksum = &safe_checksum;
+
+    if (retval = encode_krb5_safe(&safemsg, &scratch))
+       return retval;
+
+#define clean_scratch() {(void) bzero((char *)scratch->data, scratch->length); krb5_free_data(scratch);}
+                        
+    if (retval = (*(krb5_cksumarray[sumtype]->sum_func))(scratch->data,
+                                                        0, /* XXX? */
+                                                        (krb5_pointer) key->contents,
+                                                        scratch->length,
+                                                        key->length,
+                                                        &safe_checksum)) {
+       clean_scratch();
+       return retval;
+    }
+    safemsg.checksum = &safe_checksum;
+    clean_scratch();
+    if (retval = encode_krb5_safe(&safemsg, &scratch))
+       return retval;
+
+    *outbuf = *scratch;
+    free((char *)scratch);
+
+    return 0;
+}
+