aa0c1fc1c0
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@1318 ec53bebd-3082-4978-b11e-865c3cabbd6b
251 lines
6.3 KiB
C
251 lines
6.3 KiB
C
#include "krb5_locl.h"
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RCSID("$Id$");
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static krb5_error_code
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krb5_get_salt (krb5_principal princ,
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krb5_data *salt)
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{
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size_t len;
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int i;
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krb5_error_code err;
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char *p;
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len = princ->realm.length;
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for (i = 0; i < princ->ncomp; ++i)
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len += princ->comp[i].length;
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err = krb5_data_alloc (salt, len);
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if (err)
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return err;
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p = salt->data;
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strncpy (p, princ->realm.data, princ->realm.length);
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p += princ->realm.length;
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for (i = 0; i < princ->ncomp; ++i) {
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strncpy (p, princ->comp[i].data, princ->comp[i].length);
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p += princ->comp[i].length;
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}
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return 0;
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}
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static krb5_error_code
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decrypt_tkt (krb5_context context,
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const krb5_keyblock *key,
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krb5_const_pointer decrypt_arg,
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krb5_kdc_rep *dec_rep)
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{
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krb5_error_code ret;
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krb5_data data;
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ret = krb5_decrypt (context,
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dec_rep->part1.enc_part.cipher.data,
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dec_rep->part1.enc_part.cipher.length,
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key,
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&data);
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if (ret)
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return ret;
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ret = decode_EncTGSRepPart(data.data,
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data.length,
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&dec_rep->part2);
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krb5_data_free (&data);
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if (ret < 0)
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return ASN1_PARSE_ERROR;
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return 0;
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}
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int
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extract_ticket(krb5_context context,
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krb5_kdc_rep *rep,
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krb5_creds *creds,
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krb5_key_proc key_proc,
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krb5_const_pointer keyseed,
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krb5_decrypt_proc decrypt_proc,
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krb5_const_pointer decryptarg)
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{
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krb5_keyblock *key;
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krb5_error_code err;
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krb5_data salt;
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principalname2krb5_principal(&creds->client,
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rep->part1.cname,
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rep->part1.crealm);
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free (rep->part1.crealm);
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/* krb5_principal_free (rep.part1.cname);*/
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{
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char buf[1024];
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int len;
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len = encode_Ticket(buf + sizeof(buf) - 1, sizeof(buf),
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&rep->part1.ticket);
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creds->ticket.data = malloc(len);
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memcpy(creds->ticket.data, buf + sizeof(buf) - len, len);
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creds->ticket.length = len;
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creds->second_ticket.length = 0;
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}
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/* krb5_free_principal (rep->part1.ticket.sprinc);*/
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salt.length = 0;
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salt.data = NULL;
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err = krb5_get_salt (creds->client, &salt);
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if (err)
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return err;
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err = (*key_proc)(context, rep->part1.enc_part.etype, &salt,
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keyseed, &key);
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krb5_data_free (&salt);
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if (err)
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return err;
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if (decrypt_proc == NULL)
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decrypt_proc = decrypt_tkt;
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err = (*decrypt_proc)(context, key, decryptarg, rep);
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if (err)
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return err;
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memset (key->contents.data, 0, key->contents.length);
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krb5_data_free (&key->contents);
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free (key);
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principalname2krb5_principal(&creds->server,
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rep->part1.ticket.sname,
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rep->part1.ticket.realm);
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if (rep->part2.key_expiration)
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free (rep->part2.key_expiration);
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if (rep->part2.starttime) {
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creds->times.starttime = *rep->part2.starttime;
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free (rep->part2.starttime);
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} else
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creds->times.starttime = rep->part2.authtime;
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if (rep->part2.renew_till) {
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creds->times.renew_till = *rep->part2.renew_till;
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free (rep->part2.renew_till);
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} else
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creds->times.renew_till = 0;
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creds->times.authtime = rep->part2.authtime;
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creds->times.endtime = rep->part2.endtime;
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creds->addresses.number = 0;
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creds->addresses.addrs = NULL;
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#if 0 /* What? */
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if (rep->part2.req.values)
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free (rep->part2.req.values);
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#endif
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#if 0
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if (rep->part2.caddr.addrs) {
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int i;
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for (i = 0; i < rep->part2.caddr.number; ++i) {
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krb5_data_free (&rep->part2.caddr.addrs[i].address);
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}
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free (rep->part2.caddr.addrs);
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}
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krb5_principal_free (rep->part2.sname);
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krb5_data_free (&rep->part2.srealm);
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#endif
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if (err)
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return err;
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creds->session.contents.length = 0;
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creds->session.contents.data = NULL;
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creds->session.keytype = rep->part2.key.keytype;
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err = krb5_data_copy (&creds->session.contents,
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rep->part2.key.keyvalue.data,
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rep->part2.key.keyvalue.length);
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memset (rep->part2.key.keyvalue.data, 0,
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rep->part2.key.keyvalue.length);
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krb5_data_free (&rep->part2.key.keyvalue);
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creds->authdata.length = 0;
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creds->authdata.data = NULL;
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return err;
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}
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/*
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*
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*/
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krb5_error_code
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krb5_get_in_tkt(krb5_context context,
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krb5_flags options,
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krb5_address *const *addrs,
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const krb5_enctype *etypes,
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const krb5_preauthtype *ptypes,
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krb5_key_proc key_proc,
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krb5_const_pointer keyseed,
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krb5_decrypt_proc decrypt_proc,
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krb5_const_pointer decryptarg,
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krb5_creds *creds,
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krb5_ccache ccache,
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krb5_kdc_rep **ret_as_reply)
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{
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krb5_error_code err;
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AS_REQ a;
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krb5_kdc_rep rep;
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krb5_data req, resp;
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char buf[BUFSIZ];
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memset(&a, 0, sizeof(a));
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a.pvno = 5;
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a.msg_type = krb_as_req;
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a.req_body.cname = malloc(sizeof(*a.req_body.cname));
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a.req_body.sname = malloc(sizeof(*a.req_body.sname));
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krb5_principal2principalname (a.req_body.cname, creds->client);
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krb5_principal2principalname (a.req_body.sname, creds->server);
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a.req_body.realm = malloc(creds->client->realm.length + 1);
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strncpy (a.req_body.realm, creds->client->realm.data,
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creds->client->realm.length);
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a.req_body.realm[creds->client->realm.length] = '\0';
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a.req_body.till = creds->times.endtime;
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a.req_body.nonce = 17;
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if (etypes)
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abort ();
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else {
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err = krb5_get_default_in_tkt_etypes (context,
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(krb5_enctype**)&a.req_body.etype.val);
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if (err)
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return err;
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a.req_body.etype.len = 1;
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}
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if (addrs){
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} else {
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a.req_body.addresses = malloc(sizeof(*a.req_body.addresses));
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err = krb5_get_all_client_addrs ((krb5_addresses*)a.req_body.addresses);
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if (err)
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return err;
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}
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a.req_body.enc_authorization_data = NULL;
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a.req_body.additional_tickets = NULL;
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a.padata = NULL;
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req.length = encode_AS_REQ ((unsigned char*)buf + sizeof(buf) - 1,
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sizeof(buf),
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&a);
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if (req.length < 0)
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return ASN1_PARSE_ERROR;
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req.data = buf + sizeof(buf) - req.length;
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if (addrs == NULL) {
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int i;
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for (i = 0; i < a.req_body.addresses->len; ++i)
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krb5_data_free (&a.req_body.addresses->val[i].address);
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free (a.req_body.addresses->val);
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}
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err = krb5_sendto_kdc (context, &req, &creds->client->realm, &resp);
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if (err) {
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return err;
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}
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if(decode_AS_REP(resp.data, resp.length, &rep.part1) < 0)
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return ASN1_PARSE_ERROR;
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err = extract_ticket(context, &rep, creds, key_proc, keyseed,
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decrypt_proc, decryptarg);
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if(err)
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return err;
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return krb5_cc_store_cred (context, ccache, creds);
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}
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