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This commit is contained in:
Love Hornquist Astrand
2010-01-19 03:06:32 +00:00
committed by Love Hörnquist Åstrand
parent 22cb2c1a1a
commit 3b034b231d
1 changed files with 47 additions and 17 deletions
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64
kdc/kerberos5.c
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@@ -998,10 +998,13 @@ _kdc_as_rep(krb5_context context,
{
const PA_DATA *pa;
size_t len;
int i = 0;
pa = _kdc_find_padata(req, &i, KRB5_PADATA_FX_FAST));
pa = _kdc_find_padata(req, &i, KRB5_PADATA_FX_FAST);
if (pa != NULL) {
PA_FX_FAST_REQUEST fxreq;
krb5_keyblock armorkey;
ret = decode_PA_FX_FAST_REQUEST(pa->padata_value.data,
pa->padata_value.length,
&fxreq,
@@ -1009,14 +1012,14 @@ _kdc_as_rep(krb5_context context,
if (ret)
goto out;
if (len != pa->padata_value.length) {
ret = KDC_ERR_PREAUTH_FAILED;
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
if (fxreq.choice != armored_data) {
if (fxreq.element != choice_PA_FX_FAST_REQUEST_armored_data) {
kdc_log(context, config, 0,
"AS-REQ FAST contain unknown type");
ret = KDC_ERR_PREAUTH_FAILED;
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
@@ -1024,20 +1027,22 @@ _kdc_as_rep(krb5_context context,
if (fxreq.u.armored_data.armor == NULL) {
kdc_log(context, config, 0,
"AS-REQ armor missing");
ret = KDC_ERR_PREAUTH_FAILED;
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
if (fxreq.u.armored_data.armor->armor_type != 1) {
kdc_log(context, config, 0,
"AS-REQ armor type not ap-req");
ret = KDC_ERR_PREAUTH_FAILED;
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
krb5_ap_req ap_req;
ret = krb5_decode_ap_req(context, fxreq.u.armored_data.armor->armor_value, &ap_req);
ret = krb5_decode_ap_req(context,
&fxreq.u.armored_data.armor->armor_value,
&ap_req);
if(ret) {
kdc_log(context, config, 0, "AP-REQ decode failed");
goto out;
@@ -1078,28 +1083,47 @@ _kdc_as_rep(krb5_context context,
if (ac->remote_subkey == NULL) {
kdc_log(context, config, 0,
"FAST AP-REQ remote subkey missing");
ret = KDC_ERR_PREAUTH_FAILED;
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
krb5_keyblock armorkey;
krb5_crypto crypto_subkey, crypto_session, armor_crypto = NULL;
ret = krb5_crypto_fx_cf2(context, subkey, sessionkey,
krb5_crypto_init(context, ac->remote_subkey, 0, &crypto_subkey);
krb5_crypto_init(context, ac->keyblock, 0, &crypto_session);
krb5_data pepper1, pepper2;
pepper1.data = "subkeyarmor";
pepper1.length = strlen(pepper1.data);
pepper2.data = "ticketarmor";
pepper2.length = strlen(pepper2.data);
ret = krb5_crypto_fx_cf2(context, crypto_subkey, crypto_session,
&pepper1, &pepper2,
ac->remote_subkey->keytype, &armorkey);
krb5_crypto_destroy(context, crypto_subkey);
krb5_crypto_destroy(context, crypto_session);
if (ret)
goto out;
krb5_crypto_init(context, &armorkey, 0, &armor_crypto);
krb5_free_keyblock_contents(context, &armorkey);
/* verify req-checksum of the outer body */
unsigned char *buf;
size_t len, size;
ASN1_MALLOC_ENCODE(KDC_REQ_BODY, buf, len, &req->req_body, &size, ret);
if (ret)
goto out;
if (size != len) {
ret = KDC_ERR_PREAUTH_FAILED;
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
ret = krb5_verify_checksum(context, fastcrypto,
ret = krb5_verify_checksum(context, armor_crypto,
KRB5_KU_FAST_REQ_CHKSUM,
buf, len,
&fxreq.u.armored_data.req_checksum);
@@ -1107,7 +1131,9 @@ _kdc_as_rep(krb5_context context,
if (ret)
goto out;
ret = krb5_decrypt_EncryptedData(crypto, fastcrypto,
krb5_data data;
ret = krb5_decrypt_EncryptedData(context, armor_crypto,
KRB5_KU_FAST_ENC,
&fxreq.u.armored_data.enc_fast_req,
&data);
@@ -1115,12 +1141,16 @@ _kdc_as_rep(krb5_context context,
goto out;
ret = decode_KrbFastReq(data.data, data.length, &fastreq, &size);
if (ret)
if (ret) {
krb5_data_free(&data);
goto out;
}
if (data.length != size) {
ret = KDC_ERR_PREAUTH_FAILED;
krb5_data_free(&data);
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
krb5_data_free(&data);
free_KDC_REQ_BODY(&req->req_body);
ret = copy_KDC_REQ_BODY(&fastreq.req_body, &req->req_body);
@@ -1131,7 +1161,7 @@ _kdc_as_rep(krb5_context context,
if (FastOptions2int(fastreq.fast_options) & 0xfffc) {
kdc_log(context, config, 0,
"FAST unsupported mandatory option set");
ret = KDC_ERR_PREAUTH_FAILED;
ret = KRB5KDC_ERR_PREAUTH_FAILED;
goto out;
}
@@ -2051,7 +2081,7 @@ out:
if (e_data.length != len)
krb5_abortx(context, "internal asn.1 error");
fxfastrep.choice = armored_data_choice_PA_FX_FAST_REPLY;
fxfastrep.element = choice_PA_FX_FAST_REPLY_armored_data;
ret = krb5_encrypt_EncryptedData(context,
crypto,