* GSSAPI Security Extensions
* RPC Pipe client and server routines
* Copyright (C) Simo Sorce 2010.
+ * Copyright (C) Andrew Bartlett 2004-2011.
+ * Copyright (C) Stefan Metzmacher <metze@samba.org> 2004-2005
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include "includes.h"
#include "gse.h"
#include "libads/kerberos_proto.h"
+#include "auth/common_auth.h"
+#include "auth/gensec/gensec.h"
+#include "auth/credentials/credentials.h"
+#include "../librpc/gen_ndr/dcerpc.h"
#if defined(HAVE_KRB5) && defined(HAVE_GSS_WRAP_IOV)
#include "smb_krb5.h"
#include "gse_krb5.h"
+#ifndef GSS_C_DCE_STYLE
+#define GSS_C_DCE_STYLE 0x1000
+#endif
+
#ifndef GSS_KRB5_INQ_SSPI_SESSION_KEY_OID
#define GSS_KRB5_INQ_SSPI_SESSION_KEY_OID_LENGTH 11
#define GSS_KRB5_INQ_SSPI_SESSION_KEY_OID "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x05\x05"
gss_OID ret_mech;
OM_uint32 ret_flags;
- gss_cred_id_t delegated_creds;
+ gss_cred_id_t delegated_cred_handle;
gss_name_t client_name;
bool more_processing;
gss_maj = gss_release_cred(&gss_min,
&gse_ctx->creds);
}
- if (gse_ctx->delegated_creds) {
+ if (gse_ctx->delegated_cred_handle) {
gss_maj = gss_release_cred(&gss_min,
- &gse_ctx->delegated_creds);
+ &gse_ctx->delegated_cred_handle);
}
/* MIT and Heimdal differ as to if you can call
return status;
}
-NTSTATUS gse_init_client(TALLOC_CTX *mem_ctx,
- bool do_sign, bool do_seal,
- const char *ccache_name,
- const char *server,
- const char *service,
- const char *username,
- const char *password,
- uint32_t add_gss_c_flags,
- struct gse_context **_gse_ctx)
+static NTSTATUS gse_init_client(TALLOC_CTX *mem_ctx,
+ bool do_sign, bool do_seal,
+ const char *ccache_name,
+ const char *server,
+ const char *service,
+ const char *username,
+ const char *password,
+ uint32_t add_gss_c_flags,
+ struct gse_context **_gse_ctx)
{
struct gse_context *gse_ctx;
OM_uint32 gss_maj, gss_min;
return status;
}
-NTSTATUS gse_get_client_auth_token(TALLOC_CTX *mem_ctx,
- struct gse_context *gse_ctx,
- DATA_BLOB *token_in,
- DATA_BLOB *token_out)
+static NTSTATUS gse_get_client_auth_token(TALLOC_CTX *mem_ctx,
+ struct gse_context *gse_ctx,
+ const DATA_BLOB *token_in,
+ DATA_BLOB *token_out)
{
OM_uint32 gss_maj, gss_min;
gss_buffer_desc in_data;
gse_ctx->gss_c_flags,
0, GSS_C_NO_CHANNEL_BINDINGS,
&in_data, NULL, &out_data,
- NULL, NULL);
+ &gse_ctx->ret_flags, NULL);
switch (gss_maj) {
case GSS_S_COMPLETE:
/* we are done with it */
return status;
}
-NTSTATUS gse_init_server(TALLOC_CTX *mem_ctx,
- bool do_sign, bool do_seal,
- uint32_t add_gss_c_flags,
- struct gse_context **_gse_ctx)
+static NTSTATUS gse_init_server(TALLOC_CTX *mem_ctx,
+ bool do_sign, bool do_seal,
+ uint32_t add_gss_c_flags,
+ struct gse_context **_gse_ctx)
{
struct gse_context *gse_ctx;
OM_uint32 gss_maj, gss_min;
return status;
}
-NTSTATUS gse_get_server_auth_token(TALLOC_CTX *mem_ctx,
- struct gse_context *gse_ctx,
- DATA_BLOB *token_in,
- DATA_BLOB *token_out)
+static NTSTATUS gse_get_server_auth_token(TALLOC_CTX *mem_ctx,
+ struct gse_context *gse_ctx,
+ const DATA_BLOB *token_in,
+ DATA_BLOB *token_out)
{
OM_uint32 gss_maj, gss_min;
gss_buffer_desc in_data;
&gse_ctx->ret_mech,
&out_data,
&gse_ctx->ret_flags, NULL,
- &gse_ctx->delegated_creds);
+ &gse_ctx->delegated_cred_handle);
switch (gss_maj) {
case GSS_S_COMPLETE:
/* we are done with it */
return status;
}
-NTSTATUS gse_verify_server_auth_flags(struct gse_context *gse_ctx)
+static NTSTATUS gse_verify_server_auth_flags(struct gse_context *gse_ctx)
{
if (!gse_ctx->authenticated) {
return NT_STATUS_INVALID_HANDLE;
return errstr;
}
-bool gse_require_more_processing(struct gse_context *gse_ctx)
-{
- return gse_ctx->more_processing;
-}
-
-DATA_BLOB gse_get_session_key(TALLOC_CTX *mem_ctx,
- struct gse_context *gse_ctx)
+static DATA_BLOB gse_get_session_key(TALLOC_CTX *mem_ctx,
+ struct gse_context *gse_ctx)
{
OM_uint32 gss_min, gss_maj;
gss_buffer_set_t set = GSS_C_NO_BUFFER_SET;
return ret;
}
-NTSTATUS gse_get_client_name(struct gse_context *gse_ctx,
- TALLOC_CTX *mem_ctx, char **cli_name)
-{
- OM_uint32 gss_min, gss_maj;
- gss_buffer_desc name_buffer;
-
- if (!gse_ctx->authenticated) {
- return NT_STATUS_ACCESS_DENIED;
- }
-
- if (!gse_ctx->client_name) {
- return NT_STATUS_NOT_FOUND;
- }
-
- /* TODO: check OID matches KRB5 Principal Name OID ? */
-
- gss_maj = gss_display_name(&gss_min,
- gse_ctx->client_name,
- &name_buffer, NULL);
- if (gss_maj) {
- DEBUG(0, ("gss_display_name failed [%s]\n",
- gse_errstr(talloc_tos(), gss_maj, gss_min)));
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- *cli_name = talloc_strndup(talloc_tos(),
- (char *)name_buffer.value,
- name_buffer.length);
-
- gss_maj = gss_release_buffer(&gss_min, &name_buffer);
-
- if (!*cli_name) {
- return NT_STATUS_NO_MEMORY;
- }
-
- return NT_STATUS_OK;
-}
-
-NTSTATUS gse_get_authz_data(struct gse_context *gse_ctx,
- TALLOC_CTX *mem_ctx, DATA_BLOB *pac)
-{
- OM_uint32 gss_min, gss_maj;
- gss_buffer_set_t set = GSS_C_NO_BUFFER_SET;
-
- if (!gse_ctx->authenticated) {
- return NT_STATUS_ACCESS_DENIED;
- }
-
- gss_maj = gss_inquire_sec_context_by_oid(
- &gss_min, gse_ctx->gss_ctx,
- &gse_authz_data_oid, &set);
- if (gss_maj) {
- DEBUG(0, ("gss_inquire_sec_context_by_oid failed [%s]\n",
- gse_errstr(talloc_tos(), gss_maj, gss_min)));
- return NT_STATUS_NOT_FOUND;
- }
-
- if (set == GSS_C_NO_BUFFER_SET) {
- DEBUG(0, ("gss_inquire_sec_context_by_oid returned unknown "
- "data in results.\n"));
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- /* for now we just hope it is the first value */
- *pac = data_blob_talloc(mem_ctx,
- set->elements[0].value,
- set->elements[0].length);
-
- gss_maj = gss_release_buffer_set(&gss_min, &set);
-
- return NT_STATUS_OK;
-}
-
-NTSTATUS gse_get_pac_blob(struct gse_context *gse_ctx,
- TALLOC_CTX *mem_ctx, DATA_BLOB *pac_blob)
-{
- if (!gse_ctx->authenticated) {
- return NT_STATUS_ACCESS_DENIED;
- }
-
- return gssapi_obtain_pac_blob(mem_ctx, gse_ctx->gss_ctx,
- gse_ctx->client_name, pac_blob);
-}
-
-size_t gse_get_signature_length(struct gse_context *gse_ctx,
- int seal, size_t payload_size)
+static size_t gse_get_signature_length(struct gse_context *gse_ctx,
+ bool seal, size_t payload_size)
{
OM_uint32 gss_min, gss_maj;
gss_iov_buffer_desc iov[2];
- uint8_t fakebuf[payload_size];
int sealed;
+ /*
+ * gss_wrap_iov_length() only needs the type and length
+ */
iov[0].type = GSS_IOV_BUFFER_TYPE_HEADER;
iov[0].buffer.value = NULL;
iov[0].buffer.length = 0;
iov[1].type = GSS_IOV_BUFFER_TYPE_DATA;
- iov[1].buffer.value = fakebuf;
+ iov[1].buffer.value = NULL;
iov[1].buffer.length = payload_size;
gss_maj = gss_wrap_iov_length(&gss_min, gse_ctx->gss_ctx,
return iov[0].buffer.length;
}
-NTSTATUS gse_seal(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
- DATA_BLOB *data, DATA_BLOB *signature)
+static NTSTATUS gse_seal(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
+ DATA_BLOB *data, DATA_BLOB *signature)
{
OM_uint32 gss_min, gss_maj;
gss_iov_buffer_desc iov[2];
int req_seal = 1; /* setting to 1 means we request sign+seal */
- int sealed;
+ int sealed = 1;
NTSTATUS status;
/* allocate the memory ourselves so we do not need to talloc_memdup */
- signature->length = gse_get_signature_length(gse_ctx, 1, data->length);
+ signature->length = gse_get_signature_length(gse_ctx, true, data->length);
if (!signature->length) {
return NT_STATUS_INTERNAL_ERROR;
}
return status;
}
-NTSTATUS gse_unseal(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
- DATA_BLOB *data, DATA_BLOB *signature)
+static NTSTATUS gse_unseal(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
+ DATA_BLOB *data, const DATA_BLOB *signature)
{
OM_uint32 gss_min, gss_maj;
gss_iov_buffer_desc iov[2];
return status;
}
-NTSTATUS gse_sign(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
- DATA_BLOB *data, DATA_BLOB *signature)
+static NTSTATUS gse_sign(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
+ DATA_BLOB *data, DATA_BLOB *signature)
{
OM_uint32 gss_min, gss_maj;
gss_buffer_desc in_data = { 0, NULL };
return status;
}
-NTSTATUS gse_sigcheck(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
- DATA_BLOB *data, DATA_BLOB *signature)
+static NTSTATUS gse_sigcheck(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
+ const DATA_BLOB *data, const DATA_BLOB *signature)
{
OM_uint32 gss_min, gss_maj;
gss_buffer_desc in_data = { 0, NULL };
return status;
}
-#else
-
-NTSTATUS gse_init_client(TALLOC_CTX *mem_ctx,
- bool do_sign, bool do_seal,
- const char *ccache_name,
- const char *server,
- const char *service,
- const char *username,
- const char *password,
- uint32_t add_gss_c_flags,
- struct gse_context **_gse_ctx)
+static NTSTATUS gensec_gse_client_start(struct gensec_security *gensec_security)
{
- return NT_STATUS_NOT_IMPLEMENTED;
-}
+ struct gse_context *gse_ctx;
+ struct cli_credentials *creds = gensec_get_credentials(gensec_security);
+ NTSTATUS nt_status;
+ OM_uint32 want_flags = 0;
+ bool do_sign = false, do_seal = false;
+ const char *hostname = gensec_get_target_hostname(gensec_security);
+ const char *service = gensec_get_target_service(gensec_security);
+ const char *username = cli_credentials_get_username(creds);
+ const char *password = cli_credentials_get_password(creds);
+
+ if (!hostname) {
+ DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ if (is_ipaddress(hostname)) {
+ DEBUG(2, ("Cannot do GSE to an IP address\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ if (strcmp(hostname, "localhost") == 0) {
+ DEBUG(2, ("GSE to 'localhost' does not make sense\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
-NTSTATUS gse_get_client_auth_token(TALLOC_CTX *mem_ctx,
- struct gse_context *gse_ctx,
- DATA_BLOB *token_in,
- DATA_BLOB *token_out)
-{
- return NT_STATUS_NOT_IMPLEMENTED;
+ if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
+ do_sign = true;
+ }
+ if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
+ do_seal = true;
+ }
+ if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
+ want_flags |= GSS_C_DCE_STYLE;
+ }
+
+ nt_status = gse_init_client(gensec_security, do_sign, do_seal, NULL,
+ hostname, service,
+ username, password, want_flags,
+ &gse_ctx);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
+ }
+ gensec_security->private_data = gse_ctx;
+ return NT_STATUS_OK;
}
-NTSTATUS gse_init_server(TALLOC_CTX *mem_ctx,
- bool do_sign, bool do_seal,
- uint32_t add_gss_c_flags,
- struct gse_context **_gse_ctx)
+static NTSTATUS gensec_gse_server_start(struct gensec_security *gensec_security)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ struct gse_context *gse_ctx;
+ NTSTATUS nt_status;
+ OM_uint32 want_flags = 0;
+ bool do_sign = false, do_seal = false;
+
+ if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
+ do_sign = true;
+ }
+ if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
+ do_seal = true;
+ }
+ if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
+ want_flags |= GSS_C_DCE_STYLE;
+ }
+
+ nt_status = gse_init_server(gensec_security, do_sign, do_seal, want_flags,
+ &gse_ctx);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
+ }
+ gensec_security->private_data = gse_ctx;
+ return NT_STATUS_OK;
}
-NTSTATUS gse_get_server_auth_token(TALLOC_CTX *mem_ctx,
- struct gse_context *gse_ctx,
- DATA_BLOB *token_in,
- DATA_BLOB *token_out)
+/**
+ * Check if the packet is one for this mechansim
+ *
+ * @param gensec_security GENSEC state
+ * @param in The request, as a DATA_BLOB
+ * @return Error, INVALID_PARAMETER if it's not a packet for us
+ * or NT_STATUS_OK if the packet is ok.
+ */
+
+static NTSTATUS gensec_gse_magic(struct gensec_security *gensec_security,
+ const DATA_BLOB *in)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
}
-NTSTATUS gse_verify_server_auth_flags(struct gse_context *gse_ctx)
+
+/**
+ * Next state function for the GSE GENSEC mechanism
+ *
+ * @param gensec_gse_state GSE State
+ * @param mem_ctx The TALLOC_CTX for *out to be allocated on
+ * @param in The request, as a DATA_BLOB
+ * @param out The reply, as an talloc()ed DATA_BLOB, on *mem_ctx
+ * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
+ * or NT_STATUS_OK if the user is authenticated.
+ */
+
+static NTSTATUS gensec_gse_update(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ const DATA_BLOB in, DATA_BLOB *out)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ NTSTATUS status;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+
+ switch (gensec_security->gensec_role) {
+ case GENSEC_CLIENT:
+ status = gse_get_client_auth_token(mem_ctx, gse_ctx,
+ &in, out);
+ break;
+ case GENSEC_SERVER:
+ status = gse_get_server_auth_token(mem_ctx, gse_ctx,
+ &in, out);
+ break;
+ }
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ if (gse_ctx->more_processing) {
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+ }
+
+ if (gensec_security->gensec_role == GENSEC_SERVER) {
+ return gse_verify_server_auth_flags(gse_ctx);
+ }
+
+ return NT_STATUS_OK;
}
-bool gse_require_more_processing(struct gse_context *gse_ctx)
+static NTSTATUS gensec_gse_wrap(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ const DATA_BLOB *in,
+ DATA_BLOB *out)
{
- return false;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+ OM_uint32 maj_stat, min_stat;
+ gss_buffer_desc input_token, output_token;
+ int conf_state;
+ input_token.length = in->length;
+ input_token.value = in->data;
+
+ maj_stat = gss_wrap(&min_stat,
+ gse_ctx->gss_ctx,
+ gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
+ GSS_C_QOP_DEFAULT,
+ &input_token,
+ &conf_state,
+ &output_token);
+ if (GSS_ERROR(maj_stat)) {
+ DEBUG(0, ("gensec_gse_wrap: GSS Wrap failed: %s\n",
+ gse_errstr(talloc_tos(), maj_stat, min_stat)));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
+ gss_release_buffer(&min_stat, &output_token);
+
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
+ && !conf_state) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ return NT_STATUS_OK;
}
-DATA_BLOB gse_get_session_key(TALLOC_CTX *mem_ctx,
- struct gse_context *gse_ctx)
+static NTSTATUS gensec_gse_unwrap(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ const DATA_BLOB *in,
+ DATA_BLOB *out)
{
- return data_blob_null;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+ OM_uint32 maj_stat, min_stat;
+ gss_buffer_desc input_token, output_token;
+ int conf_state;
+ gss_qop_t qop_state;
+ input_token.length = in->length;
+ input_token.value = in->data;
+
+ maj_stat = gss_unwrap(&min_stat,
+ gse_ctx->gss_ctx,
+ &input_token,
+ &output_token,
+ &conf_state,
+ &qop_state);
+ if (GSS_ERROR(maj_stat)) {
+ DEBUG(0, ("gensec_gse_unwrap: GSS UnWrap failed: %s\n",
+ gse_errstr(talloc_tos(), maj_stat, min_stat)));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
+ gss_release_buffer(&min_stat, &output_token);
+
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
+ && !conf_state) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ return NT_STATUS_OK;
}
-NTSTATUS gse_get_client_name(struct gse_context *gse_ctx,
- TALLOC_CTX *mem_ctx, char **cli_name)
+static NTSTATUS gensec_gse_seal_packet(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ uint8_t *data, size_t length,
+ const uint8_t *whole_pdu, size_t pdu_length,
+ DATA_BLOB *sig)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+ DATA_BLOB payload = data_blob_const(data, length);
+ return gse_seal(mem_ctx, gse_ctx, &payload, sig);
}
-NTSTATUS gse_get_authz_data(struct gse_context *gse_ctx,
- TALLOC_CTX *mem_ctx, DATA_BLOB *pac)
+static NTSTATUS gensec_gse_unseal_packet(struct gensec_security *gensec_security,
+ uint8_t *data, size_t length,
+ const uint8_t *whole_pdu, size_t pdu_length,
+ const DATA_BLOB *sig)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+ DATA_BLOB payload = data_blob_const(data, length);
+ return gse_unseal(talloc_tos() /* unused */, gse_ctx, &payload, sig);
}
-NTSTATUS gse_get_pac_blob(struct gse_context *gse_ctx,
- TALLOC_CTX *mem_ctx, DATA_BLOB *pac_blob)
+static NTSTATUS gensec_gse_sign_packet(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ const uint8_t *data, size_t length,
+ const uint8_t *whole_pdu, size_t pdu_length,
+ DATA_BLOB *sig)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+ DATA_BLOB payload = data_blob_const(data, length);
+ return gse_sign(mem_ctx, gse_ctx, &payload, sig);
}
-size_t gse_get_signature_length(struct gse_context *gse_ctx,
- int seal, size_t payload_size)
+static NTSTATUS gensec_gse_check_packet(struct gensec_security *gensec_security,
+ const uint8_t *data, size_t length,
+ const uint8_t *whole_pdu, size_t pdu_length,
+ const DATA_BLOB *sig)
{
- return 0;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+ DATA_BLOB payload = data_blob_const(data, length);
+ return gse_sigcheck(NULL, gse_ctx, &payload, sig);
}
-NTSTATUS gse_seal(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
- DATA_BLOB *data, DATA_BLOB *signature)
+/* Try to figure out what features we actually got on the connection */
+static bool gensec_gse_have_feature(struct gensec_security *gensec_security,
+ uint32_t feature)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+
+ if (feature & GENSEC_FEATURE_SIGN) {
+ return gse_ctx->ret_flags & GSS_C_INTEG_FLAG;
+ }
+ if (feature & GENSEC_FEATURE_SEAL) {
+ return gse_ctx->ret_flags & GSS_C_CONF_FLAG;
+ }
+ if (feature & GENSEC_FEATURE_SESSION_KEY) {
+ /* Only for GSE/Krb5 */
+ if (gss_oid_equal(gse_ctx->ret_mech, gss_mech_krb5)) {
+ return true;
+ }
+ }
+ if (feature & GENSEC_FEATURE_DCE_STYLE) {
+ return gse_ctx->ret_flags & GSS_C_DCE_STYLE;
+ }
+ /* We can always do async (rather than strict request/reply) packets. */
+ if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
+ return true;
+ }
+ return false;
}
-NTSTATUS gse_unseal(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
- DATA_BLOB *data, DATA_BLOB *signature)
+/*
+ * Extract the 'sesssion key' needed by SMB signing and ncacn_np
+ * (for encrypting some passwords).
+ *
+ * This breaks all the abstractions, but what do you expect...
+ */
+static NTSTATUS gensec_gse_session_key(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ DATA_BLOB *session_key_out)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+
+ DATA_BLOB session_key = gse_get_session_key(mem_ctx, gse_ctx);
+ if (session_key.data == NULL) {
+ return NT_STATUS_NO_USER_SESSION_KEY;
+ }
+
+ *session_key_out = session_key;
+
+ return NT_STATUS_OK;
}
-NTSTATUS gse_sign(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
- DATA_BLOB *data, DATA_BLOB *signature)
+/* Get some basic (and authorization) information about the user on
+ * this session. This uses either the PAC (if present) or a local
+ * database lookup */
+static NTSTATUS gensec_gse_session_info(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ struct auth_session_info **_session_info)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+ NTSTATUS nt_status;
+ TALLOC_CTX *tmp_ctx;
+ struct auth_session_info *session_info = NULL;
+ OM_uint32 maj_stat, min_stat;
+ DATA_BLOB pac_blob, *pac_blob_ptr = NULL;
+
+ gss_buffer_desc name_token;
+ char *principal_string;
+
+ tmp_ctx = talloc_named(mem_ctx, 0, "gensec_gse_session_info context");
+ NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+ maj_stat = gss_display_name(&min_stat,
+ gse_ctx->client_name,
+ &name_token,
+ NULL);
+ if (GSS_ERROR(maj_stat)) {
+ DEBUG(1, ("GSS display_name failed: %s\n",
+ gse_errstr(talloc_tos(), maj_stat, min_stat)));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_FOOBAR;
+ }
+
+ principal_string = talloc_strndup(tmp_ctx,
+ (const char *)name_token.value,
+ name_token.length);
+
+ gss_release_buffer(&min_stat, &name_token);
+
+ if (!principal_string) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ nt_status = gssapi_obtain_pac_blob(tmp_ctx, gse_ctx->gss_ctx,
+ gse_ctx->client_name,
+ &pac_blob);
+
+ /* IF we have the PAC - otherwise we need to get this
+ * data from elsewere
+ */
+ if (NT_STATUS_IS_OK(nt_status)) {
+ pac_blob_ptr = &pac_blob;
+ }
+ nt_status = gensec_generate_session_info_pac(tmp_ctx,
+ gensec_security,
+ NULL,
+ pac_blob_ptr, principal_string,
+ gensec_get_remote_address(gensec_security),
+ &session_info);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ talloc_free(tmp_ctx);
+ return nt_status;
+ }
+
+ nt_status = gensec_gse_session_key(gensec_security, session_info,
+ &session_info->session_key);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ talloc_free(tmp_ctx);
+ return nt_status;
+ }
+
+ *_session_info = talloc_move(mem_ctx, &session_info);
+ talloc_free(tmp_ctx);
+
+ return NT_STATUS_OK;
}
-NTSTATUS gse_sigcheck(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
- DATA_BLOB *data, DATA_BLOB *signature)
+static size_t gensec_gse_sig_size(struct gensec_security *gensec_security,
+ size_t data_size)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ struct gse_context *gse_ctx =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gse_context);
+
+ return gse_get_signature_length(gse_ctx,
+ gensec_security->want_features & GENSEC_FEATURE_SEAL,
+ data_size);
}
+static const char *gensec_gse_krb5_oids[] = {
+ GENSEC_OID_KERBEROS5_OLD,
+ GENSEC_OID_KERBEROS5,
+ NULL
+};
+
+const struct gensec_security_ops gensec_gse_krb5_security_ops = {
+ .name = "gse_krb5",
+ .auth_type = DCERPC_AUTH_TYPE_KRB5,
+ .oid = gensec_gse_krb5_oids,
+ .client_start = gensec_gse_client_start,
+ .server_start = gensec_gse_server_start,
+ .magic = gensec_gse_magic,
+ .update = gensec_gse_update,
+ .session_key = gensec_gse_session_key,
+ .session_info = gensec_gse_session_info,
+ .sig_size = gensec_gse_sig_size,
+ .sign_packet = gensec_gse_sign_packet,
+ .check_packet = gensec_gse_check_packet,
+ .seal_packet = gensec_gse_seal_packet,
+ .unseal_packet = gensec_gse_unseal_packet,
+ .wrap = gensec_gse_wrap,
+ .unwrap = gensec_gse_unwrap,
+ .have_feature = gensec_gse_have_feature,
+ .enabled = true,
+ .kerberos = true,
+ .priority = GENSEC_GSSAPI
+};
+
#endif /* HAVE_KRB5 && HAVE_GSS_WRAP_IOV */
git.samba.org / metze / samba / wip.git / blobdiff