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Annotation of 43BSDReno/kerberosIV/krb/cr_err_reply.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * $Source: /usr/src/kerberosIV/krb/RCS/cr_err_reply.c,v $
        !             3:  * $Author: kfall $
        !             4:  *
        !             5:  * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
        !             6:  * of Technology.
        !             7:  *
        !             8:  * For copying and distribution information, please see the file
        !             9:  * <mit-copyright.h>.
        !            10:  */
        !            11: 
        !            12: #ifndef lint
        !            13: static char *rcsid_cr_err_reply_c =
        !            14: "$Header: /usr/src/kerberosIV/krb/RCS/cr_err_reply.c,v 4.11 90/06/25 20:55:11 kfall Exp $";
        !            15: #endif /* lint */
        !            16: 
        !            17: #include <mit-copyright.h>
        !            18: #include <sys/types.h>
        !            19: #include <des.h>
        !            20: #include <krb.h>
        !            21: #include <prot.h>
        !            22: #include <strings.h>
        !            23: 
        !            24: extern int req_act_vno;                /* this is defined in the kerberos
        !            25:                                 * server code */
        !            26: 
        !            27: /*
        !            28:  * This routine is used by the Kerberos authentication server to
        !            29:  * create an error reply packet to send back to its client.
        !            30:  *
        !            31:  * It takes a pointer to the packet to be built, the name, instance,
        !            32:  * and realm of the principal, the client's timestamp, an error code
        !            33:  * and an error string as arguments.  Its return value is undefined.
        !            34:  *
        !            35:  * The packet is built in the following format:
        !            36:  * 
        !            37:  * type                        variable           data
        !            38:  *                     or constant
        !            39:  * ----                        -----------        ----
        !            40:  *
        !            41:  * unsigned char       req_ack_vno        protocol version number
        !            42:  * 
        !            43:  * unsigned char       AUTH_MSG_ERR_REPLY protocol message type
        !            44:  * 
        !            45:  * [least significant  HOST_BYTE_ORDER    sender's (server's) byte
        !            46:  * bit of above field]                    order
        !            47:  * 
        !            48:  * string              pname              principal's name
        !            49:  * 
        !            50:  * string              pinst              principal's instance
        !            51:  * 
        !            52:  * string              prealm             principal's realm
        !            53:  * 
        !            54:  * unsigned long       time_ws            client's timestamp
        !            55:  * 
        !            56:  * unsigned long       e                  error code
        !            57:  * 
        !            58:  * string              e_string           error text
        !            59:  */
        !            60: 
        !            61: void
        !            62: cr_err_reply(pkt,pname,pinst,prealm,time_ws,e,e_string)
        !            63:     KTEXT pkt;
        !            64:     char *pname;               /* Principal's name */
        !            65:     char *pinst;               /* Principal's instance */
        !            66:     char *prealm;              /* Principal's authentication domain */
        !            67:     u_long time_ws;            /* Workstation time */
        !            68:     u_long e;                  /* Error code */
        !            69:     char *e_string;            /* Text of error */
        !            70: {
        !            71:     u_char *v = (u_char *) pkt->dat; /* Prot vers number */
        !            72:     u_char *t = (u_char *)(pkt->dat+1); /* Prot message type */
        !            73: 
        !            74:     /* Create fixed part of packet */
        !            75:     *v = (unsigned char) req_act_vno; /* KRB_PROT_VERSION; */
        !            76:     *t = (unsigned char) AUTH_MSG_ERR_REPLY;
        !            77:     *t |= HOST_BYTE_ORDER;
        !            78: 
        !            79:     /* Add the basic info */
        !            80:     (void) strcpy((char *) (pkt->dat+2),pname);
        !            81:     pkt->length = 3 + strlen(pname);
        !            82:     (void) strcpy((char *)(pkt->dat+pkt->length),pinst);
        !            83:     pkt->length += 1 + strlen(pinst);
        !            84:     (void) strcpy((char *)(pkt->dat+pkt->length),prealm);
        !            85:     pkt->length += 1 + strlen(prealm);
        !            86:     /* ws timestamp */
        !            87:     bcopy((char *) &time_ws,(char *)(pkt->dat+pkt->length),4);
        !            88:     pkt->length += 4;
        !            89:     /* err code */
        !            90:     bcopy((char *) &e,(char *)(pkt->dat+pkt->length),4);
        !            91:     pkt->length += 4;
        !            92:     /* err text */
        !            93:     (void) strcpy((char *)(pkt->dat+pkt->length),e_string);
        !            94:     pkt->length += 1 + strlen(e_string);
        !            95: 
        !            96:     /* And return */
        !            97:     return;
        !            98: }

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