Annotation of embedaddon/libpdel/ppp/ppp_auth.c, revision 1.1
1.1 ! misho 1:
! 2: /*
! 3: * Copyright (c) 2001-2002 Packet Design, LLC.
! 4: * All rights reserved.
! 5: *
! 6: * Subject to the following obligations and disclaimer of warranty,
! 7: * use and redistribution of this software, in source or object code
! 8: * forms, with or without modifications are expressly permitted by
! 9: * Packet Design; provided, however, that:
! 10: *
! 11: * (i) Any and all reproductions of the source or object code
! 12: * must include the copyright notice above and the following
! 13: * disclaimer of warranties; and
! 14: * (ii) No rights are granted, in any manner or form, to use
! 15: * Packet Design trademarks, including the mark "PACKET DESIGN"
! 16: * on advertising, endorsements, or otherwise except as such
! 17: * appears in the above copyright notice or in the software.
! 18: *
! 19: * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
! 20: * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
! 21: * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
! 22: * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
! 23: * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
! 24: * OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
! 25: * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
! 26: * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
! 27: * RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
! 28: * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
! 29: * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
! 30: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
! 31: * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
! 32: * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
! 33: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
! 35: * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
! 36: * THE POSSIBILITY OF SUCH DAMAGE.
! 37: *
! 38: * Author: Archie Cobbs <archie@freebsd.org>
! 39: */
! 40:
! 41: #include "ppp/ppp_defs.h"
! 42: #include "ppp/ppp_log.h"
! 43: #include "ppp/ppp_fsm_option.h"
! 44: #include "ppp/ppp_auth.h"
! 45: #include "ppp/ppp_auth_pap.h"
! 46: #include "ppp/ppp_auth_chap.h"
! 47:
! 48: /***********************************************************************
! 49: AUTH TYPE FUNCTIONS
! 50: ***********************************************************************/
! 51:
! 52: /* Types of CHAP */
! 53: #define CHAP_PROTO_MD5 0x05
! 54: #define CHAP_PROTO_MSV1 0x80
! 55: #define CHAP_PROTO_MSV2 0x81
! 56:
! 57: #define PRBYT(x) ((PPP_PROTO_ ## x) >> 8), ((PPP_PROTO_ ## x) & 0xff)
! 58:
! 59: /* Keep consistent with "ppp_auth.h" */
! 60: static const struct ppp_auth_type ppp_auth_types[PPP_AUTH_MAX] = {
! 61: {
! 62: "None",
! 63: PPP_AUTH_NONE,
! 64: NULL,
! 65: NULL,
! 66: 0
! 67: },
! 68: {
! 69: "PAP",
! 70: PPP_AUTH_PAP,
! 71: ppp_auth_pap_start,
! 72: ppp_auth_pap_cancel,
! 73: ppp_auth_pap_input,
! 74: 2, { PRBYT(PAP) }
! 75: },
! 76: {
! 77: "CHAP-MSv1",
! 78: PPP_AUTH_CHAP_MSV1,
! 79: ppp_auth_chap_start,
! 80: ppp_auth_chap_cancel,
! 81: ppp_auth_chap_input,
! 82: 3, { PRBYT(CHAP), CHAP_PROTO_MSV1 }
! 83: },
! 84: {
! 85: "CHAP-MSv2",
! 86: PPP_AUTH_CHAP_MSV2,
! 87: ppp_auth_chap_start,
! 88: ppp_auth_chap_cancel,
! 89: ppp_auth_chap_input,
! 90: 3, { PRBYT(CHAP), CHAP_PROTO_MSV2 }
! 91: },
! 92: {
! 93: "CHAP-MD5",
! 94: PPP_AUTH_CHAP_MD5,
! 95: ppp_auth_chap_start,
! 96: ppp_auth_chap_cancel,
! 97: ppp_auth_chap_input,
! 98: 3, { PRBYT(CHAP), CHAP_PROTO_MD5 }
! 99: },
! 100: };
! 101:
! 102: /*
! 103: * Find auth type descriptor by LCP option.
! 104: */
! 105: const struct ppp_auth_type *
! 106: ppp_auth_by_option(const struct ppp_fsm_option *opt)
! 107: {
! 108: int i;
! 109:
! 110: for (i = 1; i < PPP_AUTH_MAX; i++) {
! 111: const struct ppp_auth_type *const auth = &ppp_auth_types[i];
! 112:
! 113: if (auth->index != PPP_AUTH_NONE /* saftey first! */
! 114: && opt->len == auth->len
! 115: && memcmp(opt->data, auth->data, auth->len) == 0)
! 116: return (auth);
! 117: }
! 118: return (NULL);
! 119: }
! 120:
! 121: /*
! 122: * Find auth type descriptor by index.
! 123: */
! 124: const struct ppp_auth_type *
! 125: ppp_auth_by_index(enum ppp_auth_index index)
! 126: {
! 127: if (index <= 0 || index > PPP_AUTH_MAX) {
! 128: errno = EINVAL;
! 129: return (NULL);
! 130: }
! 131: return (&ppp_auth_types[index]);
! 132: }
! 133:
! 134: /*
! 135: * Print out an auth type option.
! 136: */
! 137: void
! 138: ppp_auth_print(const struct ppp_fsm_optdesc *desc,
! 139: const struct ppp_fsm_option *opt, char *buf, size_t bmax)
! 140: {
! 141: const struct ppp_auth_type *const auth = ppp_auth_by_option(opt);
! 142:
! 143: if (auth != NULL) {
! 144: snprintf(buf, bmax, "%s", auth->name);
! 145: return;
! 146: }
! 147: if (opt->len < 2) {
! 148: snprintf(buf, bmax, "<truncated>");
! 149: return;
! 150: }
! 151: snprintf(buf, bmax, "?0x%02x%02x", opt->data[0], opt->data[1]);
! 152: }
! 153:
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