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gensec_gssapi: add support for GENSEC_FEATURE_SIGN_PKT_HEADER

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This only works for sign/verify_packet() yet,
seal/unseal_packet() doesn't work yet...

metze
(This used to be commit c62e5d23a6)
This commit is contained in:
Stefan Metzmacher 2008-08-06 21:30:17 +02:00
parent fe7e90cca4
commit fd84beb194
1 changed files with 82 additions and 4 deletions
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86
source4/auth/gensec/gensec_gssapi.c
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@ -37,6 +37,7 @@
#include "param/param.h"
#include "auth/session_proto.h"
#include <gssapi/gssapi.h>
#include <gssapi/gssapi_krb5.h>
enum gensec_gssapi_sasl_state
{
@ -77,6 +78,7 @@ struct gensec_gssapi_state {
size_t max_wrap_buf_size;
int gss_exchange_count;
size_t sig_size;
};
static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security);
@ -191,6 +193,7 @@ static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
gensec_gssapi_state->pac = data_blob(NULL, 0);
gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
gensec_gssapi_state->sig_size = 0;
talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destructor);
@ -1035,8 +1038,13 @@ static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_securit
OM_uint32 maj_stat, min_stat;
gss_buffer_desc input_token, output_token;
input_token.length = length;
input_token.value = discard_const_p(uint8_t *, data);
if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
input_token.length = pdu_length;
input_token.value = discard_const_p(uint8_t *, whole_pdu);
} else {
input_token.length = length;
input_token.value = discard_const_p(uint8_t *, data);
}
maj_stat = gss_get_mic(&min_stat,
gensec_gssapi_state->gssapi_context,
@ -1073,8 +1081,13 @@ static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_securi
dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
input_message.length = length;
input_message.value = data;
if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
input_message.length = pdu_length;
input_message.value = whole_pdu;
} else {
input_message.length = length;
input_message.value = data;
}
input_token.length = sig->length;
input_token.value = sig->data;
@ -1369,6 +1382,70 @@ static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_securi
return NT_STATUS_OK;
}
size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security, size_t data_size)
{
struct gensec_gssapi_state *gensec_gssapi_state
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
OM_uint32 maj_stat, min_stat;
gss_krb5_lucid_context_v1_t *lucid = NULL;
if (gensec_gssapi_state->sig_size) {
return gensec_gssapi_state->sig_size;
}
if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
gensec_gssapi_state->sig_size = 45;
} else {
gensec_gssapi_state->sig_size = 37;
}
maj_stat = gss_krb5_export_lucid_sec_context(&min_stat,
&gensec_gssapi_state->gssapi_context,
1, (void **)&lucid);
if (maj_stat != GSS_S_COMPLETE) {
return gensec_gssapi_state->sig_size;
}
if (lucid->version != 1) {
return gensec_gssapi_state->sig_size;
}
if (lucid->protocol == 1) {
if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
/*
* TODO: windows uses 76 here, but we don't know
* gss_wrap works with aes keys yet
*/
gensec_gssapi_state->sig_size = 60;
} else {
gensec_gssapi_state->sig_size = 28;
}
} else if (lucid->protocol == 0) {
switch (lucid->rfc1964_kd.ctx_key.type) {
case KEYTYPE_DES:
case KEYTYPE_ARCFOUR:
case KEYTYPE_ARCFOUR_56:
if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
gensec_gssapi_state->sig_size = 45;
} else {
gensec_gssapi_state->sig_size = 37;
}
break;
case KEYTYPE_DES3:
if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
gensec_gssapi_state->sig_size = 57;
} else {
gensec_gssapi_state->sig_size = 49;
}
break;
}
}
gss_krb5_free_lucid_sec_context(&min_stat, lucid);
return gensec_gssapi_state->sig_size;
}
static const char *gensec_gssapi_krb5_oids[] = {
GENSEC_OID_KERBEROS5_OLD,
GENSEC_OID_KERBEROS5,
@ -1415,6 +1492,7 @@ static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
.update = gensec_gssapi_update,
.session_key = gensec_gssapi_session_key,
.session_info = gensec_gssapi_session_info,
.sig_size = gensec_gssapi_sig_size,
.sign_packet = gensec_gssapi_sign_packet,
.check_packet = gensec_gssapi_check_packet,
.seal_packet = gensec_gssapi_seal_packet,