Kerberos IV code, based on a merge of fixed code from KTH and original

4.4BSD Lite code (international edition).  Provides all functionality
from the original 4.4BSD code plus standard Kerberos elements that were
omitted in the 4.4BSD code.

1 files changed, 262 insertions, 0 deletions

diff --git a/kerberosIV/krb/kname_parse.c b/kerberosIV/krb/kname_parse.c
new file mode 100644
index 00000000000..3acdcce0a24
--- /dev/null
+++ b/kerberosIV/krb/kname_parse.c
@@ -0,0 +1,262 @@
+/*
+ * This software may now be redistributed outside the US.
+ *
+ * $Source: /cvs/OpenBSD/src/kerberosIV/krb/Attic/kname_parse.c,v $
+ *
+ * $Locker:  $
+ */
+
+/* 
+  Copyright (C) 1989 by the Massachusetts Institute of Technology
+
+   Export of this software from the United States of America is assumed
+   to require a specific license from the United States Government.
+   It is the responsibility of any person or organization contemplating
+   export to obtain such a license before exporting.
+
+WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+distribute this software and its documentation for any purpose and
+without fee is hereby granted, provided that the above copyright
+notice appear in all copies and that both that copyright notice and
+this permission notice appear in supporting documentation, and that
+the name of M.I.T. not be used in advertising or publicity pertaining
+to distribution of the software without specific, written prior
+permission.  M.I.T. makes no representations about the suitability of
+this software for any purpose.  It is provided "as is" without express
+or implied warranty.
+
+  */
+
+#include "krb_locl.h"
+
+#define INSTANCE_DOTS_OK        0
+
+/* max size of full name */
+#define FULL_SZ (ANAME_SZ + INST_SZ + REALM_SZ)
+
+#define NAME    0		/* which field are we in? */
+#define INST    1
+#define REALM   2
+
+/*
+ * This file contains four routines for handling Kerberos names.
+ *
+ * kname_parse() breaks a Kerberos name into its name, instance,
+ * and realm components.
+ *
+ * k_isname(), k_isinst(), and k_isrealm() check a given string to see if
+ * it's a syntactically legitimate respective part of a Kerberos name,
+ * returning 1 if it is, 0 if it isn't.
+ *
+ * Definition of "syntactically legitimate" names is according to
+ * the Project Athena Technical Plan Section E.2.1, page 7 "Specifying
+ * names", version dated 21 Dec 1987.
+ */
+
+/*
+ * kname_parse() takes a Kerberos name "fullname" of the form:
+ *
+ *		username[.instance][@realm]
+ *
+ * and returns the three components ("name", "instance", and "realm"
+ * in the example above) in the given arguments "np", "ip", and "rp".
+ *
+ * If successful, it returns KSUCCESS.  If there was an error,
+ * KNAME_FMT is returned.
+ */
+
+int
+kname_parse(np, ip, rp, fullname)
+	char *np;
+	char *ip;
+	char *rp;
+	char *fullname;
+{
+    static char buf[FULL_SZ];
+    char *rnext, *wnext;	/* next char to read, write */
+    register char c;
+    int backslash;
+    int field;
+
+    backslash = 0;
+    rnext = buf;
+    wnext = np;
+    field = NAME;
+
+    if (strlen(fullname) > FULL_SZ)
+        return KNAME_FMT;
+    (void) strcpy(buf, fullname);
+
+    while ((c = *rnext++)) {
+        if (backslash) {
+            *wnext++ = c;
+            backslash = 0;
+            continue;
+        }
+        switch (c) {
+        case '\\':
+            backslash++;
+            break;
+        case '.':
+            switch (field) {
+            case NAME:
+                if (wnext == np)
+                    return KNAME_FMT;
+                *wnext = '\0';
+                field = INST;
+                wnext = ip;
+                break;
+            case INST:
+#if     INSTANCE_DOTS_OK
+                *wnext++ = c;
+                break;
+#else /* INSTANCE_DOTS_OK */
+                return KNAME_FMT; 
+#endif /* INSTANCE_DOTS_OK */
+                /* break; */
+            case REALM:
+                *wnext++ = c;
+                break;
+            default:
+                fprintf(stderr, "unknown field value\n");
+                exit(1);
+            }
+            break;
+        case '@':
+            switch (field) {
+            case NAME:
+                if (wnext == np)
+                    return KNAME_FMT;
+                *ip = '\0';
+                /* fall through */
+            case INST:
+                *wnext = '\0';
+                field = REALM;
+                wnext = rp;
+                break;
+            case REALM:
+                return KNAME_FMT;
+            default:
+                fprintf(stderr, "unknown field value\n");
+                exit(1);
+            }
+            break;
+        default:
+            *wnext++ = c;
+        }
+    }
+    *wnext = '\0';
+    if ((strlen(np) > ANAME_SZ - 1) ||
+        (strlen(ip) > INST_SZ  - 1) ||
+        (strlen(rp) > REALM_SZ - 1))
+        return KNAME_FMT;
+    return KSUCCESS;
+}
+
+/*
+ * k_isname() returns 1 if the given name is a syntactically legitimate
+ * Kerberos name; returns 0 if it's not.
+ */
+
+int
+k_isname(s)
+	char *s;
+{
+    register char c;
+    int backslash = 0;
+
+    if (!*s)
+        return 0;
+    if (strlen(s) > ANAME_SZ - 1)
+        return 0;
+    while ((c = *s++)) {
+        if (backslash) {
+            backslash = 0;
+            continue;
+        }
+        switch(c) {
+        case '\\':
+            backslash = 1;
+            break;
+        case '.':
+            return 0;
+            /* break; */
+        case '@':
+            return 0;
+            /* break; */
+        }
+    }
+    return 1;
+}
+
+
+/*
+ * k_isinst() returns 1 if the given name is a syntactically legitimate
+ * Kerberos instance; returns 0 if it's not.
+ */
+
+int
+k_isinst(s)
+	char *s;
+{
+    register char c;
+    int backslash = 0;
+
+    if (strlen(s) > INST_SZ - 1)
+        return 0;
+    while ((c = *s++)) {
+        if (backslash) {
+            backslash = 0;
+            continue;
+        }
+        switch(c) {
+        case '\\':
+            backslash = 1;
+            break;
+        case '.':
+#if     INSTANCE_DOTS_OK
+            break;
+#else /* INSTANCE_DOTS_OK */
+            return 0; 
+#endif /* INSTANCE_DOTS_OK */
+            /* break; */
+        case '@':
+            return 0;
+            /* break; */
+        }
+    }
+    return 1;
+}
+
+/*
+ * k_isrealm() returns 1 if the given name is a syntactically legitimate
+ * Kerberos realm; returns 0 if it's not.
+ */
+
+int
+k_isrealm(s)
+	char *s;
+{
+    register char c;
+    int backslash = 0;
+
+    if (!*s)
+        return 0;
+    if (strlen(s) > REALM_SZ - 1)
+        return 0;
+    while ((c = *s++)) {
+        if (backslash) {
+            backslash = 0;
+            continue;
+        }
+        switch(c) {
+        case '\\':
+            backslash = 1;
+            break;
+        case '@':
+            return 0;
+            /* break; */
+        }
+    }
+    return 1;
+}