static krb5_error_code krb5_rd_cred_basic(krb5_context context, krb5_data *pcreddata, krb5_key pkey, krb5_replay_data *replaydata, krb5_creds ***pppcreds) { krb5_error_code retval = 0; krb5_cred * pcred = NULL; krb5_int32 ncreds = 0; krb5_int32 i = 0; krb5_cred_enc_part encpart; /* decode cred message */ if ((retval = decode_krb5_cred(pcreddata, &pcred))) return retval; memset(&encpart, 0, sizeof(encpart)); if ((retval = decrypt_credencdata(context, pcred, pkey, &encpart))) goto cleanup_cred; replaydata->timestamp = encpart.timestamp; replaydata->usec = encpart.usec; replaydata->seq = encpart.nonce; /* * Allocate the list of creds. The memory is allocated so that * krb5_free_tgt_creds can be used to free the list. */ for (ncreds = 0; pcred->tickets[ncreds]; ncreds++); if ((*pppcreds = (krb5_creds **)malloc((size_t)(sizeof(krb5_creds *) * (ncreds + 1)))) == NULL) { retval = ENOMEM; goto cleanup_cred; } (*pppcreds)[0] = NULL; /* * For each credential, create a strcture in the list of * credentials and copy the information. */ while (i < ncreds) { krb5_cred_info * pinfo; krb5_creds * pcur; krb5_data * pdata; if ((pcur = (krb5_creds *)calloc(1, sizeof(krb5_creds))) == NULL) { retval = ENOMEM; goto cleanup; } (*pppcreds)[i] = pcur; (*pppcreds)[i+1] = 0; pinfo = encpart.ticket_info[i++]; if ((retval = krb5_copy_principal(context, pinfo->client, &pcur->client))) goto cleanup; if ((retval = krb5_copy_principal(context, pinfo->server, &pcur->server))) goto cleanup; if ((retval = krb5_copy_keyblock_contents(context, pinfo->session, &pcur->keyblock))) goto cleanup; if ((retval = krb5_copy_addresses(context, pinfo->caddrs, &pcur->addresses))) goto cleanup; if ((retval = encode_krb5_ticket(pcred->tickets[i - 1], &pdata))) goto cleanup; pcur->ticket = *pdata; free(pdata); pcur->is_skey = FALSE; pcur->magic = KV5M_CREDS; pcur->times = pinfo->times; pcur->ticket_flags = pinfo->flags; pcur->authdata = NULL; /* not used */ memset(&pcur->second_ticket, 0, sizeof(pcur->second_ticket)); } /* * NULL terminate the list */ (*pppcreds)[i] = NULL; cleanup: if (retval) { krb5_free_tgt_creds(context, *pppcreds); *pppcreds = NULL; } cleanup_cred: krb5_free_cred(context, pcred); krb5_free_cred_enc_part(context, &encpart); return retval; }
/* Validate a KRB-CRED message in creddata, and return a list of forwarded * credentials along with replay cache information. */ krb5_error_code KRB5_CALLCONV krb5_rd_cred(krb5_context context, krb5_auth_context authcon, krb5_data *creddata, krb5_creds ***creds_out, krb5_replay_data *replaydata_out) { krb5_error_code ret = 0; krb5_creds **credlist = NULL; krb5_cred *krbcred = NULL; krb5_cred_enc_part *encpart = NULL; krb5_replay_data rdata; const krb5_int32 flags = authcon->auth_context_flags; *creds_out = NULL; if (((flags & KRB5_AUTH_CONTEXT_RET_TIME) || (flags & KRB5_AUTH_CONTEXT_RET_SEQUENCE)) && replaydata_out == NULL) return KRB5_RC_REQUIRED; ret = decode_krb5_cred(creddata, &krbcred); if (ret) goto cleanup; ret = decrypt_encpart(context, &krbcred->enc_part, authcon, &encpart); if (ret) goto cleanup; ret = make_cred_list(context, krbcred, encpart, &credlist); if (ret) goto cleanup; if (authcon->recv_subkey != NULL || authcon->key != NULL) { rdata.timestamp = encpart->timestamp; ret = k5_privsafe_check_replay(context, authcon, &rdata, &krbcred->enc_part, NULL); if (ret) goto cleanup; } if (flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) { if (authcon->remote_seq_number != (uint32_t)encpart->nonce) { ret = KRB5KRB_AP_ERR_BADORDER; goto cleanup; } authcon->remote_seq_number++; } *creds_out = credlist; credlist = NULL; if ((flags & KRB5_AUTH_CONTEXT_RET_TIME) || (flags & KRB5_AUTH_CONTEXT_RET_SEQUENCE)) { replaydata_out->timestamp = encpart->timestamp; replaydata_out->usec = encpart->usec; replaydata_out->seq = encpart->nonce; } cleanup: krb5_free_tgt_creds(context, credlist); krb5_free_cred(context, krbcred); krb5_free_cred_enc_part(context, encpart); free(encpart); /* krb5_free_cred_enc_part doesn't do this */ return ret; }