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wine/dlls/kerberos/unixlib.c
Alexandre Julliard 099063f0fc kerberos: Convert the Unix library to the __wine_unix_call interface. 
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2021-11-04 22:36:28 +01:00

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/*
* Unix interface for libkrb5/libgssapi_krb5
*
* Copyright 2017 Dmitry Timoshkov
* Copyright 2017 George Popoff
* Copyright 2008 Robert Shearman for CodeWeavers
* Copyright 2017,2021 Hans Leidekker for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#if 0
#pragma makedep unix
#endif
#include "config.h"
#if defined(SONAME_LIBKRB5) && defined(SONAME_LIBGSSAPI_KRB5)
#include <stdarg.h>
#include <sys/types.h>
#include <dlfcn.h>
#ifdef HAVE_KRB5_KRB5_H
# include <krb5/krb5.h>
#endif
#ifdef HAVE_GSSAPI_GSSAPI_H
# include <gssapi/gssapi.h>
#endif
#ifdef HAVE_GSSAPI_GSSAPI_EXT_H
# include <gssapi/gssapi_ext.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "winbase.h"
#include "rpc.h"
#include "sspi.h"
#include "ntsecapi.h"
#include "ntsecpkg.h"
#include "wine/debug.h"
#include "unixlib.h"
WINE_DEFAULT_DEBUG_CHANNEL(kerberos);
WINE_DECLARE_DEBUG_CHANNEL(winediag);
static void *libkrb5_handle;
#define MAKE_FUNCPTR(f) static typeof(f) * p_##f
MAKE_FUNCPTR( krb5_cc_close );
MAKE_FUNCPTR( krb5_cc_default );
MAKE_FUNCPTR( krb5_cc_end_seq_get );
MAKE_FUNCPTR( krb5_cc_initialize );
MAKE_FUNCPTR( krb5_cc_next_cred );
MAKE_FUNCPTR( krb5_cc_start_seq_get );
MAKE_FUNCPTR( krb5_cc_store_cred );
MAKE_FUNCPTR( krb5_cccol_cursor_free );
MAKE_FUNCPTR( krb5_cccol_cursor_new );
MAKE_FUNCPTR( krb5_cccol_cursor_next );
MAKE_FUNCPTR( krb5_decode_ticket );
MAKE_FUNCPTR( krb5_free_context );
MAKE_FUNCPTR( krb5_free_cred_contents );
MAKE_FUNCPTR( krb5_free_principal );
MAKE_FUNCPTR( krb5_free_ticket );
MAKE_FUNCPTR( krb5_free_unparsed_name );
MAKE_FUNCPTR( krb5_get_init_creds_opt_alloc );
MAKE_FUNCPTR( krb5_get_init_creds_opt_free );
MAKE_FUNCPTR( krb5_get_init_creds_opt_set_out_ccache );
MAKE_FUNCPTR( krb5_get_init_creds_password );
MAKE_FUNCPTR( krb5_init_context );
MAKE_FUNCPTR( krb5_is_config_principal );
MAKE_FUNCPTR( krb5_parse_name_flags );
MAKE_FUNCPTR( krb5_unparse_name_flags );
#undef MAKE_FUNCPTR
static BOOL load_krb5(void)
{
if (!(libkrb5_handle = dlopen( SONAME_LIBKRB5, RTLD_NOW )))
{
WARN_(winediag)( "failed to load %s, Kerberos support will be disabled\n", SONAME_LIBKRB5 );
return FALSE;
}
#define LOAD_FUNCPTR(f) \
if (!(p_##f = dlsym( libkrb5_handle, #f ))) \
{ \
ERR( "failed to load %s\n", #f ); \
goto fail; \
}
LOAD_FUNCPTR( krb5_cc_close )
LOAD_FUNCPTR( krb5_cc_default )
LOAD_FUNCPTR( krb5_cc_end_seq_get )
LOAD_FUNCPTR( krb5_cc_initialize )
LOAD_FUNCPTR( krb5_cc_next_cred )
LOAD_FUNCPTR( krb5_cc_start_seq_get )
LOAD_FUNCPTR( krb5_cc_store_cred )
LOAD_FUNCPTR( krb5_cccol_cursor_free )
LOAD_FUNCPTR( krb5_cccol_cursor_new )
LOAD_FUNCPTR( krb5_cccol_cursor_next )
LOAD_FUNCPTR( krb5_decode_ticket )
LOAD_FUNCPTR( krb5_free_context )
LOAD_FUNCPTR( krb5_free_cred_contents )
LOAD_FUNCPTR( krb5_free_principal )
LOAD_FUNCPTR( krb5_free_ticket )
LOAD_FUNCPTR( krb5_free_unparsed_name )
LOAD_FUNCPTR( krb5_get_init_creds_opt_alloc )
LOAD_FUNCPTR( krb5_get_init_creds_opt_free )
LOAD_FUNCPTR( krb5_get_init_creds_opt_set_out_ccache )
LOAD_FUNCPTR( krb5_get_init_creds_password )
LOAD_FUNCPTR( krb5_init_context )
LOAD_FUNCPTR( krb5_is_config_principal )
LOAD_FUNCPTR( krb5_parse_name_flags )
LOAD_FUNCPTR( krb5_unparse_name_flags )
#undef LOAD_FUNCPTR
return TRUE;
fail:
dlclose( libkrb5_handle );
libkrb5_handle = NULL;
return FALSE;
}
static void unload_krb5(void)
{
dlclose( libkrb5_handle );
libkrb5_handle = NULL;
}
static NTSTATUS krb5_error_to_status( krb5_error_code err )
{
switch (err)
{
case 0: return STATUS_SUCCESS;
default: return STATUS_UNSUCCESSFUL; /* FIXME */
}
}
struct ticket_list
{
ULONG count;
ULONG allocated;
KERB_TICKET_CACHE_INFO *tickets;
};
static void utf8_to_wstr( UNICODE_STRING *strW, const char *src )
{
ULONG dstlen, srclen = strlen( src ) + 1;
strW->Buffer = malloc( srclen * sizeof(WCHAR) );
RtlUTF8ToUnicodeN( strW->Buffer, srclen * sizeof(WCHAR), &dstlen, src, srclen );
strW->MaximumLength = dstlen;
strW->Length = dstlen - sizeof(WCHAR);
}
static NTSTATUS copy_tickets_from_cache( krb5_context ctx, krb5_ccache cache, struct ticket_list *list )
{
NTSTATUS status;
krb5_cc_cursor cursor;
krb5_error_code err;
krb5_creds creds;
krb5_ticket *ticket;
char *name_with_realm, *name_without_realm, *realm_name;
if ((err = p_krb5_cc_start_seq_get( ctx, cache, &cursor ))) return krb5_error_to_status( err );
for (;;)
{
if ((err = p_krb5_cc_next_cred( ctx, cache, &cursor, &creds )))
{
if (err == KRB5_CC_END)
status = STATUS_SUCCESS;
else
status = krb5_error_to_status( err );
break;
}
if (p_krb5_is_config_principal( ctx, creds.server ))
{
p_krb5_free_cred_contents( ctx, &creds );
continue;
}
if (list->count == list->allocated)
{
ULONG new_allocated = max( 16, list->allocated * 2 );
KERB_TICKET_CACHE_INFO *new_tickets = realloc( list->tickets, sizeof(*new_tickets) * new_allocated );
if (!new_tickets)
{
p_krb5_free_cred_contents( ctx, &creds );
status = STATUS_NO_MEMORY;
break;
}
list->tickets = new_tickets;
list->allocated = new_allocated;
}
if ((err = p_krb5_unparse_name_flags( ctx, creds.server, 0, &name_with_realm )))
{
p_krb5_free_cred_contents( ctx, &creds );
status = krb5_error_to_status( err );
break;
}
TRACE( "name_with_realm: %s\n", debugstr_a(name_with_realm) );
if ((err = p_krb5_unparse_name_flags( ctx, creds.server, KRB5_PRINCIPAL_UNPARSE_NO_REALM,
&name_without_realm )))
{
p_krb5_free_unparsed_name( ctx, name_with_realm );
p_krb5_free_cred_contents( ctx, &creds );
status = krb5_error_to_status( err );
break;
}
TRACE( "name_without_realm: %s\n", debugstr_a(name_without_realm) );
utf8_to_wstr( &list->tickets[list->count].ServerName, name_without_realm );
if (!(realm_name = strchr( name_with_realm, '@' )))
{
ERR( "wrong name with realm %s\n", debugstr_a(name_with_realm) );
realm_name = name_with_realm;
}
else realm_name++;
/* realm_name - now contains only realm! */
utf8_to_wstr( &list->tickets[list->count].RealmName, realm_name );
if (!creds.times.starttime) creds.times.starttime = creds.times.authtime;
/* TODO: if krb5_is_config_principal = true */
/* note: store times as seconds, they will be converted to NT timestamps on the PE side */
list->tickets[list->count].StartTime.QuadPart = creds.times.starttime;
list->tickets[list->count].EndTime.QuadPart = creds.times.endtime;
list->tickets[list->count].RenewTime.QuadPart = creds.times.renew_till;
list->tickets[list->count].TicketFlags = creds.ticket_flags;
err = p_krb5_decode_ticket( &creds.ticket, &ticket );
p_krb5_free_unparsed_name( ctx, name_with_realm );
p_krb5_free_unparsed_name( ctx, name_without_realm );
p_krb5_free_cred_contents( ctx, &creds );
if (err)
{
status = krb5_error_to_status( err );
break;
}
list->tickets[list->count].EncryptionType = ticket->enc_part.enctype;
p_krb5_free_ticket( ctx, ticket );
list->count++;
}
p_krb5_cc_end_seq_get( ctx, cache, &cursor );
return status;
}
static NTSTATUS copy_tickets_to_client( struct ticket_list *list, KERB_QUERY_TKT_CACHE_RESPONSE *resp,
ULONG *out_size )
{
char *client_str;
ULONG i, size = offsetof( KERB_QUERY_TKT_CACHE_RESPONSE, Tickets[list->count] );
for (i = 0; i < list->count; i++)
{
size += list->tickets[i].RealmName.MaximumLength;
size += list->tickets[i].ServerName.MaximumLength;
}
if (!resp || size > *out_size)
{
*out_size = size;
return STATUS_BUFFER_TOO_SMALL;
}
*out_size = size;
resp->MessageType = KerbQueryTicketCacheMessage;
resp->CountOfTickets = list->count;
memcpy( resp->Tickets, list->tickets, list->count * sizeof(list->tickets[0]) );
client_str = (char *)&resp->Tickets[list->count];
for (i = 0; i < list->count; i++)
{
resp->Tickets[i].RealmName.Buffer = (WCHAR *)client_str;
memcpy( client_str, list->tickets[i].RealmName.Buffer, list->tickets[i].RealmName.MaximumLength );
client_str += list->tickets[i].RealmName.MaximumLength;
resp->Tickets[i].ServerName.Buffer = (WCHAR *)client_str;
memcpy( client_str, list->tickets[i].ServerName.Buffer, list->tickets[i].ServerName.MaximumLength );
client_str += list->tickets[i].ServerName.MaximumLength;
}
return STATUS_SUCCESS;
}
static NTSTATUS query_ticket_cache( void *args )
{
struct query_ticket_cache_params *params = args;
NTSTATUS status;
krb5_error_code err;
krb5_context ctx;
krb5_cccol_cursor cursor = NULL;
krb5_ccache cache;
ULONG i;
struct ticket_list list = { 0 };
if ((err = p_krb5_init_context( &ctx ))) return krb5_error_to_status( err );
if ((err = p_krb5_cccol_cursor_new( ctx, &cursor )))
{
status = krb5_error_to_status( err );
goto done;
}
for (;;)
{
if ((err = p_krb5_cccol_cursor_next( ctx, cursor, &cache )))
{
status = krb5_error_to_status( err );
goto done;
}
if (!cache) break;
status = copy_tickets_from_cache( ctx, cache, &list );
p_krb5_cc_close( ctx, cache );
if (status != STATUS_SUCCESS) goto done;
}
done:
if (cursor) p_krb5_cccol_cursor_free( ctx, &cursor );
if (ctx) p_krb5_free_context( ctx );
if (status == STATUS_SUCCESS) status = copy_tickets_to_client( &list, params->resp, params->out_size );
for (i = 0; i < list.count; i++)
{
free( list.tickets[i].RealmName.Buffer );
free( list.tickets[i].ServerName.Buffer );
}
return status;
}
static void *libgssapi_krb5_handle;
#define MAKE_FUNCPTR(f) static typeof(f) * p##f
MAKE_FUNCPTR( gss_accept_sec_context );
MAKE_FUNCPTR( gss_acquire_cred );
MAKE_FUNCPTR( gss_delete_sec_context );
MAKE_FUNCPTR( gss_display_status );
MAKE_FUNCPTR( gss_get_mic );
MAKE_FUNCPTR( gss_import_name );
MAKE_FUNCPTR( gss_init_sec_context );
MAKE_FUNCPTR( gss_inquire_context );
MAKE_FUNCPTR( gss_release_buffer );
MAKE_FUNCPTR( gss_release_cred );
MAKE_FUNCPTR( gss_release_iov_buffer );
MAKE_FUNCPTR( gss_release_name );
MAKE_FUNCPTR( gss_unwrap );
MAKE_FUNCPTR( gss_unwrap_iov );
MAKE_FUNCPTR( gss_verify_mic );
MAKE_FUNCPTR( gss_wrap );
MAKE_FUNCPTR( gss_wrap_iov );
#undef MAKE_FUNCPTR
static BOOL load_gssapi_krb5(void)
{
if (!(libgssapi_krb5_handle = dlopen( SONAME_LIBGSSAPI_KRB5, RTLD_NOW )))
{
WARN_(winediag)( "failed to load %s, Kerberos support will be disabled\n", SONAME_LIBGSSAPI_KRB5 );
return FALSE;
}
#define LOAD_FUNCPTR(f) \
if (!(p##f = dlsym( libgssapi_krb5_handle, #f ))) \
{ \
ERR( "failed to load %s\n", #f ); \
goto fail; \
}
LOAD_FUNCPTR( gss_accept_sec_context)
LOAD_FUNCPTR( gss_acquire_cred)
LOAD_FUNCPTR( gss_delete_sec_context)
LOAD_FUNCPTR( gss_display_status)
LOAD_FUNCPTR( gss_get_mic)
LOAD_FUNCPTR( gss_import_name)
LOAD_FUNCPTR( gss_init_sec_context)
LOAD_FUNCPTR( gss_inquire_context)
LOAD_FUNCPTR( gss_release_buffer)
LOAD_FUNCPTR( gss_release_cred)
LOAD_FUNCPTR( gss_release_iov_buffer)
LOAD_FUNCPTR( gss_release_name)
LOAD_FUNCPTR( gss_unwrap)
LOAD_FUNCPTR( gss_unwrap_iov)
LOAD_FUNCPTR( gss_verify_mic)
LOAD_FUNCPTR( gss_wrap )
LOAD_FUNCPTR( gss_wrap_iov )
#undef LOAD_FUNCPTR
return TRUE;
fail:
dlclose( libgssapi_krb5_handle );
libgssapi_krb5_handle = NULL;
return FALSE;
}
static BOOL is_dce_style_context( gss_ctx_id_t ctx )
{
OM_uint32 ret, minor_status, flags;
ret = pgss_inquire_context( &minor_status, ctx, NULL, NULL, NULL, NULL, &flags, NULL, NULL );
return (ret == GSS_S_COMPLETE && (flags & GSS_C_DCE_STYLE));
}
static int get_buffer_index( SecBufferDesc *desc, DWORD type )
{
UINT i;
if (!desc) return -1;
for (i = 0; i < desc->cBuffers; i++)
{
if (desc->pBuffers[i].BufferType == type) return i;
}
return -1;
}
static NTSTATUS status_gss_to_sspi( OM_uint32 status )
{
switch (status)
{
case GSS_S_COMPLETE: return SEC_E_OK;
case GSS_S_BAD_MECH: return SEC_E_SECPKG_NOT_FOUND;
case GSS_S_BAD_SIG: return SEC_E_MESSAGE_ALTERED;
case GSS_S_NO_CRED: return SEC_E_NO_CREDENTIALS;
case GSS_S_NO_CONTEXT: return SEC_E_INVALID_HANDLE;
case GSS_S_DEFECTIVE_TOKEN: return SEC_E_INVALID_TOKEN;
case GSS_S_DEFECTIVE_CREDENTIAL: return SEC_E_NO_CREDENTIALS;
case GSS_S_CREDENTIALS_EXPIRED: return SEC_E_CONTEXT_EXPIRED;
case GSS_S_CONTEXT_EXPIRED: return SEC_E_CONTEXT_EXPIRED;
case GSS_S_BAD_QOP: return SEC_E_QOP_NOT_SUPPORTED;
case GSS_S_CONTINUE_NEEDED: return SEC_I_CONTINUE_NEEDED;
case GSS_S_DUPLICATE_TOKEN: return SEC_E_INVALID_TOKEN;
case GSS_S_OLD_TOKEN: return SEC_E_INVALID_TOKEN;
case GSS_S_UNSEQ_TOKEN: return SEC_E_OUT_OF_SEQUENCE;
case GSS_S_GAP_TOKEN: return SEC_E_OUT_OF_SEQUENCE;
case GSS_S_FAILURE: return SEC_E_INTERNAL_ERROR;
default:
FIXME( "couldn't convert status 0x%08x to NTSTATUS\n", status );
return SEC_E_INTERNAL_ERROR;
}
}
static void trace_gss_status_ex( OM_uint32 code, int type )
{
OM_uint32 ret, minor_status;
gss_buffer_desc buf;
OM_uint32 msg_ctx = 0;
for (;;)
{
ret = pgss_display_status( &minor_status, code, type, GSS_C_NULL_OID, &msg_ctx, &buf );
if (GSS_ERROR( ret ))
{
TRACE( "gss_display_status(0x%08x,%d) returned %08x minor status %08x\n", code, type, ret, minor_status );
return;
}
TRACE( "GSS-API error: 0x%08x: %s\n", code, debugstr_an(buf.value, buf.length) );
pgss_release_buffer( &minor_status, &buf );
if (!msg_ctx) return;
}
}
static void trace_gss_status( OM_uint32 major_status, OM_uint32 minor_status )
{
if (TRACE_ON(kerberos))
{
trace_gss_status_ex( major_status, GSS_C_GSS_CODE );
trace_gss_status_ex( minor_status, GSS_C_MECH_CODE );
}
}
static inline gss_ctx_id_t ctxhandle_sspi_to_gss( LSA_SEC_HANDLE handle )
{
return (gss_ctx_id_t)handle;
}
static inline gss_cred_id_t credhandle_sspi_to_gss( LSA_SEC_HANDLE handle )
{
return (gss_cred_id_t)handle;
}
static inline void ctxhandle_gss_to_sspi( gss_ctx_id_t handle, LSA_SEC_HANDLE *ctx )
{
*ctx = (LSA_SEC_HANDLE)handle;
}
static inline void credhandle_gss_to_sspi( gss_cred_id_t handle, LSA_SEC_HANDLE *cred )
{
*cred = (LSA_SEC_HANDLE)handle;
}
static ULONG flags_gss_to_asc_ret( ULONG flags )
{
ULONG ret = 0;
if (flags & GSS_C_DELEG_FLAG) ret |= ASC_RET_DELEGATE;
if (flags & GSS_C_MUTUAL_FLAG) ret |= ASC_RET_MUTUAL_AUTH;
if (flags & GSS_C_REPLAY_FLAG) ret |= ASC_RET_REPLAY_DETECT;
if (flags & GSS_C_SEQUENCE_FLAG) ret |= ASC_RET_SEQUENCE_DETECT;
if (flags & GSS_C_CONF_FLAG) ret |= ASC_RET_CONFIDENTIALITY;
if (flags & GSS_C_INTEG_FLAG) ret |= ASC_RET_INTEGRITY;
if (flags & GSS_C_ANON_FLAG) ret |= ASC_RET_NULL_SESSION;
if (flags & GSS_C_DCE_STYLE) ret |= ASC_RET_USED_DCE_STYLE;
if (flags & GSS_C_IDENTIFY_FLAG) ret |= ASC_RET_IDENTIFY;
return ret;
}
static NTSTATUS accept_context( void *args )
{
struct accept_context_params *params = args;
OM_uint32 ret, minor_status, ret_flags = 0, expiry_time;
gss_cred_id_t cred_handle = credhandle_sspi_to_gss( params->credential );
gss_ctx_id_t ctx_handle = ctxhandle_sspi_to_gss( params->context );
gss_buffer_desc input_token, output_token;
int idx;
if (!params->input) input_token.length = 0;
else
{
if ((idx = get_buffer_index( params->input, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
input_token.length = params->input->pBuffers[idx].cbBuffer;
input_token.value = params->input->pBuffers[idx].pvBuffer;
}
if ((idx = get_buffer_index( params->output, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
output_token.length = 0;
output_token.value = NULL;
ret = pgss_accept_sec_context( &minor_status, &ctx_handle, cred_handle, &input_token, GSS_C_NO_CHANNEL_BINDINGS,
NULL, NULL, &output_token, &ret_flags, &expiry_time, NULL );
TRACE( "gss_accept_sec_context returned %08x minor status %08x ret_flags %08x\n", ret, minor_status, ret_flags );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
if (ret == GSS_S_COMPLETE || ret == GSS_S_CONTINUE_NEEDED)
{
if (output_token.length > params->output->pBuffers[idx].cbBuffer) /* FIXME: check if larger buffer exists */
{
TRACE( "buffer too small %lu > %u\n", (SIZE_T)output_token.length, params->output->pBuffers[idx].cbBuffer );
pgss_release_buffer( &minor_status, &output_token );
pgss_delete_sec_context( &minor_status, &ctx_handle, GSS_C_NO_BUFFER );
return SEC_E_BUFFER_TOO_SMALL;
}
params->output->pBuffers[idx].cbBuffer = output_token.length;
memcpy( params->output->pBuffers[idx].pvBuffer, output_token.value, output_token.length );
pgss_release_buffer( &minor_status, &output_token );
ctxhandle_gss_to_sspi( ctx_handle, params->new_context );
if (params->context_attr) *params->context_attr = flags_gss_to_asc_ret( ret_flags );
*params->expiry = expiry_time;
}
return status_gss_to_sspi( ret );
}
static NTSTATUS init_creds( const char *user_at_domain, const char *password )
{
krb5_context ctx;
krb5_principal principal = NULL;
krb5_get_init_creds_opt *options = NULL;
krb5_ccache cache = NULL;
krb5_creds creds;
krb5_error_code err;
if (!user_at_domain) return STATUS_SUCCESS;
if ((err = p_krb5_init_context( &ctx ))) return krb5_error_to_status( err );
if ((err = p_krb5_parse_name_flags( ctx, user_at_domain, 0, &principal ))) goto done;
if ((err = p_krb5_cc_default( ctx, &cache ))) goto done;
if ((err = p_krb5_get_init_creds_opt_alloc( ctx, &options ))) goto done;
if ((err = p_krb5_get_init_creds_opt_set_out_ccache( ctx, options, cache ))) goto done;
if ((err = p_krb5_get_init_creds_password( ctx, &creds, principal, password, 0, NULL, 0, NULL, 0 ))) goto done;
if ((err = p_krb5_cc_initialize( ctx, cache, principal ))) goto done;
if ((err = p_krb5_cc_store_cred( ctx, cache, &creds ))) goto done;
TRACE( "success\n" );
p_krb5_free_cred_contents( ctx, &creds );
done:
if (cache) p_krb5_cc_close( ctx, cache );
if (principal) p_krb5_free_principal( ctx, principal );
if (options) p_krb5_get_init_creds_opt_free( ctx, options );
p_krb5_free_context( ctx );
return krb5_error_to_status( err );
}
static NTSTATUS import_name( const char *src, gss_name_t *dst )
{
OM_uint32 ret, minor_status;
gss_buffer_desc buf;
buf.length = strlen( src );
buf.value = (void *)src;
ret = pgss_import_name( &minor_status, &buf, GSS_C_NO_OID, dst );
TRACE( "gss_import_name returned %08x minor status %08x\n", ret, minor_status );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
return status_gss_to_sspi( ret );
}
static NTSTATUS acquire_credentials_handle( void *args )
{
struct acquire_credentials_handle_params *params = args;
OM_uint32 ret, minor_status, expiry_time;
gss_name_t name = GSS_C_NO_NAME;
gss_cred_usage_t cred_usage;
gss_cred_id_t cred_handle;
NTSTATUS status;
switch (params->credential_use)
{
case SECPKG_CRED_INBOUND:
cred_usage = GSS_C_ACCEPT;
break;
case SECPKG_CRED_OUTBOUND:
if ((status = init_creds( params->username, params->password )) != STATUS_SUCCESS) return status;
cred_usage = GSS_C_INITIATE;
break;
default:
FIXME( "SECPKG_CRED_BOTH not supported\n" );
return SEC_E_UNKNOWN_CREDENTIALS;
}
if (params->principal && (status = import_name( params->principal, &name ))) return status;
ret = pgss_acquire_cred( &minor_status, name, GSS_C_INDEFINITE, GSS_C_NULL_OID_SET, cred_usage, &cred_handle,
NULL, &expiry_time );
TRACE( "gss_acquire_cred returned %08x minor status %08x\n", ret, minor_status );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
if (ret == GSS_S_COMPLETE)
{
credhandle_gss_to_sspi( cred_handle, params->credential );
*params->expiry = expiry_time;
}
if (name != GSS_C_NO_NAME) pgss_release_name( &minor_status, &name );
return status_gss_to_sspi( ret );
}
static NTSTATUS delete_context( void *args )
{
OM_uint32 ret, minor_status;
gss_ctx_id_t ctx_handle = ctxhandle_sspi_to_gss( (LSA_SEC_HANDLE)args );
ret = pgss_delete_sec_context( &minor_status, &ctx_handle, GSS_C_NO_BUFFER );
TRACE( "gss_delete_sec_context returned %08x minor status %08x\n", ret, minor_status );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
return status_gss_to_sspi( ret );
}
static NTSTATUS free_credentials_handle( void *args )
{
OM_uint32 ret, minor_status;
gss_cred_id_t cred = credhandle_sspi_to_gss( (LSA_SEC_HANDLE)args );
ret = pgss_release_cred( &minor_status, &cred );
TRACE( "gss_release_cred returned %08x minor status %08x\n", ret, minor_status );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
return status_gss_to_sspi( ret );
}
static ULONG flags_isc_req_to_gss( ULONG flags )
{
ULONG ret = 0;
if (flags & ISC_REQ_DELEGATE) ret |= GSS_C_DELEG_FLAG;
if (flags & ISC_REQ_MUTUAL_AUTH) ret |= GSS_C_MUTUAL_FLAG;
if (flags & ISC_REQ_REPLAY_DETECT) ret |= GSS_C_REPLAY_FLAG;
if (flags & ISC_REQ_SEQUENCE_DETECT) ret |= GSS_C_SEQUENCE_FLAG;
if (flags & ISC_REQ_CONFIDENTIALITY) ret |= GSS_C_CONF_FLAG;
if (flags & ISC_REQ_INTEGRITY) ret |= GSS_C_INTEG_FLAG;
if (flags & ISC_REQ_NULL_SESSION) ret |= GSS_C_ANON_FLAG;
if (flags & ISC_REQ_USE_DCE_STYLE) ret |= GSS_C_DCE_STYLE;
if (flags & ISC_REQ_IDENTIFY) ret |= GSS_C_IDENTIFY_FLAG;
return ret;
}
static ULONG flags_gss_to_isc_ret( ULONG flags )
{
ULONG ret = 0;
if (flags & GSS_C_DELEG_FLAG) ret |= ISC_RET_DELEGATE;
if (flags & GSS_C_MUTUAL_FLAG) ret |= ISC_RET_MUTUAL_AUTH;
if (flags & GSS_C_REPLAY_FLAG) ret |= ISC_RET_REPLAY_DETECT;
if (flags & GSS_C_SEQUENCE_FLAG) ret |= ISC_RET_SEQUENCE_DETECT;
if (flags & GSS_C_CONF_FLAG) ret |= ISC_RET_CONFIDENTIALITY;
if (flags & GSS_C_INTEG_FLAG) ret |= ISC_RET_INTEGRITY;
if (flags & GSS_C_ANON_FLAG) ret |= ISC_RET_NULL_SESSION;
if (flags & GSS_C_DCE_STYLE) ret |= ISC_RET_USED_DCE_STYLE;
if (flags & GSS_C_IDENTIFY_FLAG) ret |= ISC_RET_IDENTIFY;
return ret;
}
static NTSTATUS initialize_context( void *args )
{
struct initialize_context_params *params = args;
OM_uint32 ret, minor_status, ret_flags = 0, expiry_time, req_flags = flags_isc_req_to_gss( params->context_req );
gss_cred_id_t cred_handle = credhandle_sspi_to_gss( params->credential );
gss_ctx_id_t ctx_handle = ctxhandle_sspi_to_gss( params->context );
gss_buffer_desc input_token, output_token;
gss_name_t target = GSS_C_NO_NAME;
NTSTATUS status;
int idx;
if ((idx = get_buffer_index( params->input, SECBUFFER_TOKEN )) == -1) input_token.length = 0;
else
{
input_token.length = params->input->pBuffers[idx].cbBuffer;
input_token.value = params->input->pBuffers[idx].pvBuffer;
}
if ((idx = get_buffer_index( params->output, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
output_token.length = 0;
output_token.value = NULL;
if (params->target_name && (status = import_name( params->target_name, &target ))) return status;
ret = pgss_init_sec_context( &minor_status, cred_handle, &ctx_handle, target, GSS_C_NO_OID, req_flags, 0,
GSS_C_NO_CHANNEL_BINDINGS, &input_token, NULL, &output_token, &ret_flags,
&expiry_time );
TRACE( "gss_init_sec_context returned %08x minor status %08x ret_flags %08x\n", ret, minor_status, ret_flags );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
if (ret == GSS_S_COMPLETE || ret == GSS_S_CONTINUE_NEEDED)
{
if (output_token.length > params->output->pBuffers[idx].cbBuffer) /* FIXME: check if larger buffer exists */
{
TRACE( "buffer too small %lu > %u\n", (SIZE_T)output_token.length, params->output->pBuffers[idx].cbBuffer );
pgss_release_buffer( &minor_status, &output_token );
pgss_delete_sec_context( &minor_status, &ctx_handle, GSS_C_NO_BUFFER );
return SEC_E_INCOMPLETE_MESSAGE;
}
params->output->pBuffers[idx].cbBuffer = output_token.length;
memcpy( params->output->pBuffers[idx].pvBuffer, output_token.value, output_token.length );
pgss_release_buffer( &minor_status, &output_token );
ctxhandle_gss_to_sspi( ctx_handle, params->new_context );
if (params->context_attr) *params->context_attr = flags_gss_to_isc_ret( ret_flags );
*params->expiry = expiry_time;
}
if (target != GSS_C_NO_NAME) pgss_release_name( &minor_status, &target );
return status_gss_to_sspi( ret );
}
static NTSTATUS make_signature( void *args )
{
struct make_signature_params *params = args;
SecBufferDesc *msg = params->msg;
OM_uint32 ret, minor_status;
gss_buffer_desc data_buffer, token_buffer;
gss_ctx_id_t ctx_handle = ctxhandle_sspi_to_gss( params->context );
int data_idx, token_idx;
/* FIXME: multiple data buffers, read-only buffers */
if ((data_idx = get_buffer_index( msg, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
data_buffer.length = msg->pBuffers[data_idx].cbBuffer;
data_buffer.value = msg->pBuffers[data_idx].pvBuffer;
if ((token_idx = get_buffer_index( msg, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
token_buffer.length = 0;
token_buffer.value = NULL;
ret = pgss_get_mic( &minor_status, ctx_handle, GSS_C_QOP_DEFAULT, &data_buffer, &token_buffer );
TRACE( "gss_get_mic returned %08x minor status %08x\n", ret, minor_status );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
if (ret == GSS_S_COMPLETE)
{
memcpy( msg->pBuffers[token_idx].pvBuffer, token_buffer.value, token_buffer.length );
msg->pBuffers[token_idx].cbBuffer = token_buffer.length;
pgss_release_buffer( &minor_status, &token_buffer );
}
return status_gss_to_sspi( ret );
}
#define KERBEROS_MAX_SIGNATURE 37
#define KERBEROS_SECURITY_TRAILER 49
#define KERBEROS_MAX_SIGNATURE_DCE 28
#define KERBEROS_SECURITY_TRAILER_DCE 76
static NTSTATUS query_context_attributes( void *args )
{
struct query_context_attributes_params *params = args;
switch (params->attr)
{
case SECPKG_ATTR_SIZES:
{
SecPkgContext_Sizes *sizes = (SecPkgContext_Sizes *)params->buf;
ULONG size_max_signature, size_security_trailer;
gss_ctx_id_t ctx = ctxhandle_sspi_to_gss( params->context );
if (is_dce_style_context( ctx ))
{
size_max_signature = KERBEROS_MAX_SIGNATURE_DCE;
size_security_trailer = KERBEROS_SECURITY_TRAILER_DCE;
}
else
{
size_max_signature = KERBEROS_MAX_SIGNATURE;
size_security_trailer = KERBEROS_SECURITY_TRAILER;
}
sizes->cbMaxToken = KERBEROS_MAX_BUF;
sizes->cbMaxSignature = size_max_signature;
sizes->cbBlockSize = 1;
sizes->cbSecurityTrailer = size_security_trailer;
return SEC_E_OK;
}
default:
FIXME( "unhandled attribute %u\n", params->attr );
break;
}
return SEC_E_UNSUPPORTED_FUNCTION;
}
static NTSTATUS seal_message_vector( gss_ctx_id_t ctx, SecBufferDesc *msg, ULONG qop )
{
gss_iov_buffer_desc iov[4];
OM_uint32 ret, minor_status;
int token_idx, data_idx, conf_flag, conf_state;
if (!qop)
conf_flag = 1; /* confidentiality + integrity */
else if (qop == SECQOP_WRAP_NO_ENCRYPT)
conf_flag = 0; /* only integrity */
else
{
FIXME( "QOP %08x not supported\n", qop );
return SEC_E_UNSUPPORTED_FUNCTION;
}
/* FIXME: multiple data buffers, read-only buffers */
if ((data_idx = get_buffer_index( msg, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
if ((token_idx = get_buffer_index( msg, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
iov[0].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY | GSS_IOV_BUFFER_FLAG_ALLOCATE;
iov[0].buffer.length = 0;
iov[0].buffer.value = NULL;
iov[1].type = GSS_IOV_BUFFER_TYPE_DATA;
iov[1].buffer.length = msg->pBuffers[data_idx].cbBuffer;
iov[1].buffer.value = msg->pBuffers[data_idx].pvBuffer;
iov[2].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY | GSS_IOV_BUFFER_FLAG_ALLOCATE;
iov[2].buffer.length = 0;
iov[2].buffer.value = NULL;
iov[3].type = GSS_IOV_BUFFER_TYPE_HEADER | GSS_IOV_BUFFER_FLAG_ALLOCATE;
iov[3].buffer.length = 0;
iov[3].buffer.value = NULL;
ret = pgss_wrap_iov( &minor_status, ctx, conf_flag, GSS_C_QOP_DEFAULT, &conf_state, iov, 4 );
TRACE( "gss_wrap_iov returned %08x minor status %08x\n", ret, minor_status );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
if (ret == GSS_S_COMPLETE)
{
memcpy( msg->pBuffers[token_idx].pvBuffer, iov[3].buffer.value, iov[3].buffer.length );
msg->pBuffers[token_idx].cbBuffer = iov[3].buffer.length;
pgss_release_iov_buffer( &minor_status, iov, 4 );
}
return status_gss_to_sspi( ret );
}
static NTSTATUS seal_message_no_vector( gss_ctx_id_t ctx, SecBufferDesc *msg, ULONG qop )
{
gss_buffer_desc input, output;
OM_uint32 ret, minor_status;
int token_idx, data_idx, conf_flag, conf_state;
if (!qop)
conf_flag = 1; /* confidentiality + integrity */
else if (qop == SECQOP_WRAP_NO_ENCRYPT)
conf_flag = 0; /* only integrity */
else
{
FIXME( "QOP %08x not supported\n", qop );
return SEC_E_UNSUPPORTED_FUNCTION;
}
/* FIXME: multiple data buffers, read-only buffers */
if ((data_idx = get_buffer_index( msg, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
if ((token_idx = get_buffer_index( msg, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
input.length = msg->pBuffers[data_idx].cbBuffer;
input.value = msg->pBuffers[data_idx].pvBuffer;
ret = pgss_wrap( &minor_status, ctx, conf_flag, GSS_C_QOP_DEFAULT, &input, &conf_state, &output );
TRACE( "gss_wrap returned %08x minor status %08x\n", ret, minor_status );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
if (ret == GSS_S_COMPLETE)
{
DWORD len_data = msg->pBuffers[data_idx].cbBuffer, len_token = msg->pBuffers[token_idx].cbBuffer;
if (len_token < output.length - len_data)
{
TRACE( "buffer too small %lu > %u\n", (SIZE_T)output.length - len_data, len_token );
pgss_release_buffer( &minor_status, &output );
return SEC_E_BUFFER_TOO_SMALL;
}
memcpy( msg->pBuffers[data_idx].pvBuffer, output.value, len_data );
memcpy( msg->pBuffers[token_idx].pvBuffer, (char *)output.value + len_data, output.length - len_data );
msg->pBuffers[token_idx].cbBuffer = output.length - len_data;
pgss_release_buffer( &minor_status, &output );
}
return status_gss_to_sspi( ret );
}
static NTSTATUS seal_message( void *args )
{
struct seal_message_params *params = args;
gss_ctx_id_t ctx = ctxhandle_sspi_to_gss( params->context );
if (is_dce_style_context( ctx )) return seal_message_vector( ctx, params->msg, params->qop );
return seal_message_no_vector( ctx, params->msg, params->qop );
}
static NTSTATUS unseal_message_vector( gss_ctx_id_t ctx, SecBufferDesc *msg, ULONG *qop )
{
gss_iov_buffer_desc iov[4];
OM_uint32 ret, minor_status;
int token_idx, data_idx, conf_state;
if ((data_idx = get_buffer_index( msg, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
if ((token_idx = get_buffer_index( msg, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
iov[0].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;
iov[0].buffer.length = 0;
iov[0].buffer.value = NULL;
iov[1].type = GSS_IOV_BUFFER_TYPE_DATA;
iov[1].buffer.length = msg->pBuffers[data_idx].cbBuffer;
iov[1].buffer.value = msg->pBuffers[data_idx].pvBuffer;
iov[2].type = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;
iov[2].buffer.length = 0;
iov[2].buffer.value = NULL;
iov[3].type = GSS_IOV_BUFFER_TYPE_HEADER;
iov[3].buffer.length = msg->pBuffers[token_idx].cbBuffer;
iov[3].buffer.value = msg->pBuffers[token_idx].pvBuffer;
ret = pgss_unwrap_iov( &minor_status, ctx, &conf_state, NULL, iov, 4 );
TRACE( "gss_unwrap_iov returned %08x minor status %08x\n", ret, minor_status );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
if (ret == GSS_S_COMPLETE && qop)
{
*qop = (conf_state ? 0 : SECQOP_WRAP_NO_ENCRYPT);
}
return status_gss_to_sspi( ret );
}
static NTSTATUS unseal_message_no_vector( gss_ctx_id_t ctx, SecBufferDesc *msg, ULONG *qop )
{
gss_buffer_desc input, output;
OM_uint32 ret, minor_status;
int token_idx, data_idx, conf_state;
DWORD len_data, len_token;
if ((data_idx = get_buffer_index( msg, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
if ((token_idx = get_buffer_index( msg, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
len_data = msg->pBuffers[data_idx].cbBuffer;
len_token = msg->pBuffers[token_idx].cbBuffer;
input.length = len_data + len_token;
if (!(input.value = malloc( input.length ))) return SEC_E_INSUFFICIENT_MEMORY;
memcpy( input.value, msg->pBuffers[data_idx].pvBuffer, len_data );
memcpy( (char *)input.value + len_data, msg->pBuffers[token_idx].pvBuffer, len_token );
ret = pgss_unwrap( &minor_status, ctx, &input, &output, &conf_state, NULL );
free( input.value );
TRACE( "gss_unwrap returned %08x minor status %08x\n", ret, minor_status );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
if (ret == GSS_S_COMPLETE)
{
if (qop) *qop = (conf_state ? 0 : SECQOP_WRAP_NO_ENCRYPT);
memcpy( msg->pBuffers[data_idx].pvBuffer, output.value, len_data );
pgss_release_buffer( &minor_status, &output );
}
return status_gss_to_sspi( ret );
}
static NTSTATUS unseal_message( void *args )
{
struct unseal_message_params *params = args;
gss_ctx_id_t ctx = ctxhandle_sspi_to_gss( params->context );
if (is_dce_style_context( ctx )) return unseal_message_vector( ctx, params->msg, params->qop );
return unseal_message_no_vector( ctx, params->msg, params->qop );
}
static NTSTATUS verify_signature( void *args )
{
struct verify_signature_params *params = args;
SecBufferDesc *msg = params->msg;
OM_uint32 ret, minor_status;
gss_buffer_desc data_buffer, token_buffer;
gss_ctx_id_t ctx_handle = ctxhandle_sspi_to_gss( params->context );
int data_idx, token_idx;
if ((data_idx = get_buffer_index( msg, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
data_buffer.length = msg->pBuffers[data_idx].cbBuffer;
data_buffer.value = msg->pBuffers[data_idx].pvBuffer;
if ((token_idx = get_buffer_index( msg, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
token_buffer.length = msg->pBuffers[token_idx].cbBuffer;
token_buffer.value = msg->pBuffers[token_idx].pvBuffer;
ret = pgss_verify_mic( &minor_status, ctx_handle, &data_buffer, &token_buffer, NULL );
TRACE( "gss_verify_mic returned %08x minor status %08x\n", ret, minor_status );
if (GSS_ERROR( ret )) trace_gss_status( ret, minor_status );
if (ret == GSS_S_COMPLETE && params->qop) *params->qop = 0;
return status_gss_to_sspi( ret );
}
static NTSTATUS process_attach( void *args )
{
if (load_krb5() && load_gssapi_krb5()) return STATUS_SUCCESS;
if (libkrb5_handle) unload_krb5();
return STATUS_DLL_NOT_FOUND;
}
unixlib_entry_t __wine_unix_call_funcs[] =
{
process_attach,
accept_context,
acquire_credentials_handle,
delete_context,
free_credentials_handle,
initialize_context,
make_signature,
query_context_attributes,
query_ticket_cache,
seal_message,
unseal_message,
verify_signature,
};
#endif /* defined(SONAME_LIBKRB5) && defined(SONAME_LIBGSSAPI_KRB5) */
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