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Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
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+/*
+ * chap.h - Challenge Handshake Authentication Protocol definitions.
+ *
+ * Copyright (c) 1993 The Australian National University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the Australian National University. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Copyright (c) 1991 Gregory M. Christy
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the author.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Id: chap.h,v 1.1 2008-08-04 06:11:51 winfred Exp $
+ */
+
+#ifndef __CHAP_INCLUDE__
+
+/* Code + ID + length */
+#define CHAP_HEADERLEN 4
+
+/*
+ * CHAP codes.
+ */
+
+#define CHAP_DIGEST_MD5 5 /* use MD5 algorithm */
+#define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */
+#define CHAP_MICROSOFT 0x80 /* use Microsoft-compatible alg. */
+#define MS_CHAP_RESPONSE_LEN 49 /* Response length for MS-CHAP */
+#define CHAP_MICROSOFT_V2 0x81 /* use MS-CHAP v2 */
+
+#define CHAP_CHALLENGE 1
+#define CHAP_RESPONSE 2
+#define CHAP_SUCCESS 3
+#define CHAP_FAILURE 4
+#define CHAP_SUCCESS_R 13 /* Send response, not text message */
+
+/*
+ * Challenge lengths (for challenges we send) and other limits.
+ */
+#define MIN_CHALLENGE_LENGTH 16
+#define MAX_CHALLENGE_LENGTH 24
+#define MAX_RESPONSE_LENGTH 64 /* sufficient for MD5 or MS-CHAP */
+
+/*
+ * Each interface is described by a chap structure.
+ */
+
+typedef struct chap_state {
+ int unit; /* Interface unit number */
+ int clientstate; /* Client state */
+ int serverstate; /* Server state */
+ u_char challenge[MAX_CHALLENGE_LENGTH]; /* last challenge string sent */
+ u_char chal_len; /* challenge length */
+ u_char chal_id; /* ID of last challenge */
+ u_char chal_type; /* hash algorithm for challenges */
+ u_char id; /* Current id */
+ char *chal_name; /* Our name to use with challenge */
+ int chal_interval; /* Time until we challenge peer again */
+ int timeouttime; /* Timeout time in seconds */
+ int max_transmits; /* Maximum # of challenge transmissions */
+ int chal_transmits; /* Number of transmissions of challenge */
+ int resp_transmits; /* Number of transmissions of response */
+ u_char response[MAX_RESPONSE_LENGTH]; /* Response to send */
+ u_char resp_length; /* length of response */
+ u_char resp_id; /* ID for response messages */
+ u_char resp_type; /* hash algorithm for responses */
+ char *resp_name; /* Our name to send with response */
+} chap_state;
+
+
+/*
+ * Client (peer) states.
+ */
+#define CHAPCS_INITIAL 0 /* Lower layer down, not opened */
+#define CHAPCS_CLOSED 1 /* Lower layer up, not opened */
+#define CHAPCS_PENDING 2 /* Auth us to peer when lower up */
+#define CHAPCS_LISTEN 3 /* Listening for a challenge */
+#define CHAPCS_RESPONSE 4 /* Sent response, waiting for status */
+#define CHAPCS_OPEN 5 /* We've received Success */
+
+/*
+ * Server (authenticator) states.
+ */
+#define CHAPSS_INITIAL 0 /* Lower layer down, not opened */
+#define CHAPSS_CLOSED 1 /* Lower layer up, not opened */
+#define CHAPSS_PENDING 2 /* Auth peer when lower up */
+#define CHAPSS_INITIAL_CHAL 3 /* We've sent the first challenge */
+#define CHAPSS_OPEN 4 /* We've sent a Success msg */
+#define CHAPSS_RECHALLENGE 5 /* We've sent another challenge */
+#define CHAPSS_BADAUTH 6 /* We've sent a Failure msg */
+
+/*
+ * Timeouts.
+ */
+#define CHAP_DEFTIMEOUT 3 /* Timeout time in seconds */
+#define CHAP_DEFTRANSMITS 10 /* max # times to send challenge */
+
+extern chap_state chap[];
+
+void ChapAuthWithPeer __P((int, char *, int));
+void ChapAuthPeer __P((int, char *, int));
+void ChapGenChallenge __P((chap_state *));
+
+int reqchap(char **);
+
+extern struct protent chap_protent;
+
+#define __CHAP_INCLUDE__
+#endif /* __CHAP_INCLUDE__ */