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-rw-r--r--src/mac/MacOSX/Sources/cr_tkt.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/src/mac/MacOSX/Sources/cr_tkt.c b/src/mac/MacOSX/Sources/cr_tkt.c
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+/*
+ * cr_tkt.c
+ *
+ * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
+ * of Technology.
+ *
+ * For copying and distribution information, please see the file
+ * <mit-copyright.h>.
+ */
+
+#include <Kerberos/krb5.h>
+#include <Kerberos/des.h>
+#include <Kerberos/krb.h>
+#include <string.h>
+#include "cr_tkt.h"
+
+#define MSB_FIRST 0 /* 68000, IBM RT/PC */
+#define LSB_FIRST 1 /* Vax, PC8086 */
+#if defined(__ppc__)
+ #define HOST_BYTE_ORDER MSB_FIRST
+#elif defined(__i386__)
+ #define HOST_BYTE_ORDER LSB_FIRST
+#else
+ #error Unknown architecture!
+#endif
+
+static int
+krb_cr_tkt_int(
+ KTEXT tkt, /* Gets filled in by the ticket */
+ unsigned char flags, /* Various Kerberos flags */
+ char *pname, /* Principal's name */
+ char *pinstance, /* Principal's instance */
+ char *prealm, /* Principal's authentication domain */
+ long paddress, /* Net address of requesting entity */
+ char *session, /* Session key inserted in ticket */
+ short life, /* Lifetime of the ticket */
+ long time_sec, /* Issue time and date */
+ char *sname, /* Service Name */
+ char *sinstance, /* Instance Name */
+ C_Block key, /* Service's secret key */
+ krb5_keyblock *k5key); /* NULL if not present */
+
+/*
+ * Create ticket takes as arguments information that should be in a
+ * ticket, and the KTEXT object in which the ticket should be
+ * constructed. It then constructs a ticket and returns, leaving the
+ * newly created ticket in tkt.
+#ifndef NOENCRYPTION
+ * The data in tkt->dat is encrypted in the server's key.
+#endif
+ * The length of the ticket is a multiple of
+ * eight bytes and is in tkt->length.
+ *
+ * If the ticket is too long, the ticket will contain nulls.
+ * The return value of the routine is undefined.
+ *
+ * The corresponding routine to extract information from a ticket it
+ * decomp_ticket. When changes are made to this routine, the
+ * corresponding changes should also be made to that file.
+ *
+ * The packet is built in the following format:
+ *
+ * variable
+ * type or constant data
+ * ---- ----------- ----
+ *
+ * tkt->length length of ticket (multiple of 8 bytes)
+ *
+#ifdef NOENCRYPTION
+ * tkt->dat:
+#else
+ * tkt->dat: (encrypted in server's key)
+#endif
+ *
+ * unsigned char flags namely, HOST_BYTE_ORDER
+ *
+ * string pname client's name
+ *
+ * string pinstance client's instance
+ *
+ * string prealm client's realm
+ *
+ * 4 bytes paddress client's address
+ *
+ * 8 bytes session session key
+ *
+ * 1 byte life ticket lifetime
+ *
+ * 4 bytes time_sec KDC timestamp
+ *
+ * string sname service's name
+ *
+ * string sinstance service's instance
+ *
+ * <=7 bytes null null pad to 8 byte multiple
+ *
+ */
+int
+krb_create_ticket(tkt, flags, pname, pinstance, prealm, paddress,
+ session, life, time_sec, sname, sinstance, key)
+ KTEXT tkt; /* Gets filled in by the ticket */
+ unsigned char flags; /* Various Kerberos flags */
+ char *pname; /* Principal's name */
+ char *pinstance; /* Principal's instance */
+ char *prealm; /* Principal's authentication domain */
+ long paddress; /* Net address of requesting entity */
+ char *session; /* Session key inserted in ticket */
+ short life; /* Lifetime of the ticket */
+ long time_sec; /* Issue time and date */
+ char *sname; /* Service Name */
+ char *sinstance; /* Instance Name */
+ C_Block key; /* Service's secret key */
+{
+ return krb_cr_tkt_int(tkt, flags, pname, pinstance, prealm, paddress,
+ session, life, time_sec, sname, sinstance,
+ key, NULL);
+}
+
+int
+krb_cr_tkt_krb5(tkt, flags, pname, pinstance, prealm, paddress,
+ session, life, time_sec, sname, sinstance, k5key)
+ KTEXT tkt; /* Gets filled in by the ticket */
+ unsigned char flags; /* Various Kerberos flags */
+ char *pname; /* Principal's name */
+ char *pinstance; /* Principal's instance */
+ char *prealm; /* Principal's authentication domain */
+ long paddress; /* Net address of requesting entity */
+ char *session; /* Session key inserted in ticket */
+ short life; /* Lifetime of the ticket */
+ long time_sec; /* Issue time and date */
+ char *sname; /* Service Name */
+ char *sinstance; /* Instance Name */
+ krb5_keyblock *k5key; /* NULL if not present */
+{
+ C_Block key;
+
+ return krb_cr_tkt_int(tkt, flags, pname, pinstance, prealm, paddress,
+ session, life, time_sec, sname, sinstance,
+ key, k5key);
+}
+
+static int
+krb_cr_tkt_int(tkt, flags, pname, pinstance, prealm, paddress,
+ session, life, time_sec, sname, sinstance, key, k5key)
+ KTEXT tkt; /* Gets filled in by the ticket */
+ unsigned char flags; /* Various Kerberos flags */
+ char *pname; /* Principal's name */
+ char *pinstance; /* Principal's instance */
+ char *prealm; /* Principal's authentication domain */
+ long paddress; /* Net address of requesting entity */
+ char *session; /* Session key inserted in ticket */
+ short life; /* Lifetime of the ticket */
+ long time_sec; /* Issue time and date */
+ char *sname; /* Service Name */
+ char *sinstance; /* Instance Name */
+ C_Block key; /* Service's secret key */
+ krb5_keyblock *k5key; /* NULL if not present */
+{
+ Key_schedule key_s;
+ register char *data; /* running index into ticket */
+
+ tkt->length = 0; /* Clear previous data */
+
+ /* Check length of ticket */
+ if (sizeof(tkt->dat) < (sizeof(flags) +
+ 1 + strlen(pname) +
+ 1 + strlen(pinstance) +
+ 1 + strlen(prealm) +
+ 4 + /* address */
+ 8 + /* session */
+ 1 + /* life */
+ 4 + /* issue time */
+ 1 + strlen(sname) +
+ 1 + strlen(sinstance) +
+ 7) / 8) { /* roundoff */
+ memset(tkt->dat, 0, sizeof(tkt->dat));
+ return KFAILURE /* XXX */;
+ }
+
+ flags |= HOST_BYTE_ORDER; /* ticket byte order */
+ memcpy((char *) (tkt->dat), (char *) &flags, sizeof(flags));
+ data = ((char *)tkt->dat) + sizeof(flags);
+ (void) strcpy(data, pname);
+ data += 1 + strlen(pname);
+ (void) strcpy(data, pinstance);
+ data += 1 + strlen(pinstance);
+ (void) strcpy(data, prealm);
+ data += 1 + strlen(prealm);
+ memcpy(data, (char *) &paddress, 4);
+ data += 4;
+
+ memcpy(data, (char *) session, 8);
+ data += 8;
+ *(data++) = (char) life;
+ /* issue time */
+ memcpy(data, (char *) &time_sec, 4);
+ data += 4;
+ (void) strcpy(data, sname);
+ data += 1 + strlen(sname);
+ (void) strcpy(data, sinstance);
+ data += 1 + strlen(sinstance);
+
+ /* guarantee null padded ticket to multiple of 8 bytes */
+ memset(data, 0, 7);
+ tkt->length = ((data - ((char *)tkt->dat) + 7)/8)*8;
+
+ /* Check length of ticket */
+ if (tkt->length > (sizeof(KTEXT_ST) - 7)) {
+ memset(tkt->dat, 0, tkt->length);
+ tkt->length = 0;
+ return KFAILURE /* XXX */;
+ }
+
+#ifndef NOENCRYPTION
+ /* Encrypt the ticket in the services key */
+ if (k5key != NULL) {
+ /* block locals */
+ krb5_data in;
+ krb5_enc_data out;
+ krb5_error_code ret;
+ size_t enclen;
+
+ in.length = tkt->length;
+ in.data = tkt->dat;
+ /* XXX assumes context arg is ignored */
+ ret = krb5_c_encrypt_length(NULL, k5key->enctype,
+ (size_t)in.length, &enclen);
+ if (ret)
+ return KFAILURE;
+ out.ciphertext.length = enclen;
+ out.ciphertext.data = malloc(enclen);
+ if (out.ciphertext.data == NULL)
+ return KFAILURE; /* XXX maybe ENOMEM? */
+
+ /* XXX assumes context arg is ignored */
+ ret = krb5_c_encrypt(NULL, k5key, KRB5_KEYUSAGE_KDC_REP_TICKET,
+ NULL, &in, &out);
+ if (ret) {
+ free(out.ciphertext.data);
+ return KFAILURE;
+ } else {
+ tkt->length = out.ciphertext.length;
+ memcpy(tkt->dat, out.ciphertext.data, out.ciphertext.length);
+ memset(out.ciphertext.data, 0, out.ciphertext.length);
+ free(out.ciphertext.data);
+ }
+ } else {
+ key_sched(key,key_s);
+ pcbc_encrypt((C_Block *)tkt->dat,(C_Block *)tkt->dat,
+ (long) tkt->length,key_s,(C_Block *)key,1);
+ }
+#endif /* !NOENCRYPTION */
+ return 0;
+}
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