void KRB5_LIB_FUNCTION
krb5_free_ap_rep_enc_part (krb5_context context,
krb5_ap_rep_enc_part *val)
{
if (val) {
free_EncAPRepPart (val);
free (val);
}
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_mk_rep(krb5_context context,
krb5_auth_context auth_context,
krb5_data *outbuf)
{
krb5_error_code ret;
AP_REP ap;
EncAPRepPart body;
u_char *buf = NULL;
size_t buf_size;
size_t len = 0;
krb5_crypto crypto;
ap.pvno = 5;
ap.msg_type = krb_ap_rep;
memset (&body, 0, sizeof(body));
body.ctime = auth_context->authenticator->ctime;
body.cusec = auth_context->authenticator->cusec;
if (auth_context->flags & KRB5_AUTH_CONTEXT_USE_SUBKEY) {
if (auth_context->local_subkey == NULL) {
ret = krb5_auth_con_generatelocalsubkey(context,
auth_context,
auth_context->keyblock);
if(ret) {
free_EncAPRepPart(&body);
return ret;
}
}
ret = krb5_copy_keyblock(context, auth_context->local_subkey,
&body.subkey);
if (ret) {
free_EncAPRepPart(&body);
return krb5_enomem(context);
}
} else
body.subkey = NULL;
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
if(auth_context->local_seqnumber == 0)
krb5_generate_seq_number (context,
auth_context->keyblock,
&auth_context->local_seqnumber);
ALLOC(body.seq_number, 1);
if (body.seq_number == NULL) {
free_EncAPRepPart(&body);
return krb5_enomem(context);
}
*(body.seq_number) = auth_context->local_seqnumber;
} else
body.seq_number = NULL;
ap.enc_part.etype = auth_context->keyblock->keytype;
ap.enc_part.kvno = NULL;
ASN1_MALLOC_ENCODE(EncAPRepPart, buf, buf_size, &body, &len, ret);
free_EncAPRepPart (&body);
if(ret)
return ret;
if (buf_size != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
ret = krb5_crypto_init(context, auth_context->keyblock,
0 /* ap.enc_part.etype */, &crypto);
if (ret) {
free (buf);
return ret;
}
ret = krb5_encrypt (context,
crypto,
KRB5_KU_AP_REQ_ENC_PART,
buf + buf_size - len,
len,
&ap.enc_part.cipher);
krb5_crypto_destroy(context, crypto);
free(buf);
if (ret)
return ret;
ASN1_MALLOC_ENCODE(AP_REP, outbuf->data, outbuf->length, &ap, &len, ret);
if (ret == 0 && outbuf->length != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
free_AP_REP (&ap);
return ret;
}