[PATCH v2 1/5] kerberos: Move support for SpAcquireCredentialsHandle/SpFreeCredentialsHandle to a new Unix library.

Hans Leidekker hans at codeweavers.com
Tue Apr 20 08:56:48 CDT 2021


v2: Copy copyright headers.

Signed-off-by: Hans Leidekker <hans at codeweavers.com>
---
 dlls/kerberos/Makefile.in |   3 +-
 dlls/kerberos/krb5_ap.c   | 189 ++++++------------
 dlls/kerberos/unixlib.c   | 402 ++++++++++++++++++++++++++++++++++++++
 dlls/kerberos/unixlib.h   |  29 +++
 4 files changed, 494 insertions(+), 129 deletions(-)
 create mode 100644 dlls/kerberos/unixlib.c
 create mode 100644 dlls/kerberos/unixlib.h

diff --git a/dlls/kerberos/Makefile.in b/dlls/kerberos/Makefile.in
index f67ba567fb0..ab5e6b59976 100644
--- a/dlls/kerberos/Makefile.in
+++ b/dlls/kerberos/Makefile.in
@@ -2,4 +2,5 @@ MODULE    = kerberos.dll
 EXTRAINCL = $(KRB5_CFLAGS) $(GSSAPI_CFLAGS)
 
 C_SRCS = \
-	krb5_ap.c
+	krb5_ap.c \
+	unixlib.c
diff --git a/dlls/kerberos/krb5_ap.c b/dlls/kerberos/krb5_ap.c
index 44d6b86e019..08265beeceb 100644
--- a/dlls/kerberos/krb5_ap.c
+++ b/dlls/kerberos/krb5_ap.c
@@ -46,9 +46,14 @@
 #include "wine/heap.h"
 #include "wine/debug.h"
 #include "wine/unicode.h"
+#include "unixlib.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(kerberos);
 
+static HINSTANCE instance;
+
+const struct krb5_funcs *krb5_funcs = NULL;
+
 #define KERBEROS_MAX_BUF 12000
 
 #define KERBEROS_CAPS \
@@ -840,8 +845,19 @@ static int get_buffer_index( SecBufferDesc *desc, DWORD type )
     }
     return -1;
 }
+#endif /* SONAME_LIBGSSAPI_KRB5 */
 
-static char *get_user_at_domain( const WCHAR *user, ULONG user_len, const WCHAR *domain, ULONG domain_len )
+static char *get_str_unixcp( const UNICODE_STRING *str )
+{
+    char *ret;
+    int len = WideCharToMultiByte( CP_UNIXCP, 0, str->Buffer, str->Length / sizeof(WCHAR), NULL, 0, NULL, NULL );
+    if (!(ret = heap_alloc( len + 1 ))) return NULL;
+    WideCharToMultiByte( CP_UNIXCP, 0, str->Buffer, str->Length / sizeof(WCHAR), ret, len, NULL, NULL );
+    ret[len] = 0;
+    return ret;
+}
+
+static char *get_username_unixcp( const WCHAR *user, ULONG user_len, const WCHAR *domain, ULONG domain_len )
 {
     int len_user, len_domain;
     char *ret;
@@ -857,7 +873,7 @@ static char *get_user_at_domain( const WCHAR *user, ULONG user_len, const WCHAR
     return ret;
 }
 
-static char *get_password( const WCHAR *passwd, ULONG passwd_len )
+static char *get_password_unixcp( const WCHAR *passwd, ULONG passwd_len )
 {
     int len;
     char *ret;
@@ -869,145 +885,44 @@ static char *get_password( const WCHAR *passwd, ULONG passwd_len )
     return ret;
 }
 
-static NTSTATUS init_creds( const SEC_WINNT_AUTH_IDENTITY_W *id )
-{
-    char *user_at_domain, *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 (!id) return STATUS_SUCCESS;
-    if (id->Flags & SEC_WINNT_AUTH_IDENTITY_ANSI)
-    {
-        FIXME( "ANSI identity not supported\n" );
-        return SEC_E_UNSUPPORTED_FUNCTION;
-    }
-    if (!(user_at_domain = get_user_at_domain( id->User, id->UserLength, id->Domain, id->DomainLength )))
-    {
-        return SEC_E_INSUFFICIENT_MEMORY;
-    }
-    if (!(password = get_password( id->Password, id->PasswordLength )))
-    {
-        heap_free( user_at_domain );
-        return SEC_E_INSUFFICIENT_MEMORY;
-    }
-
-    if ((err = p_krb5_init_context( &ctx )))
-    {
-        heap_free( password );
-        heap_free( user_at_domain );
-        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 );
-    heap_free( user_at_domain );
-    heap_free( password );
-
-    return krb5_error_to_status( err );
-}
-
-static NTSTATUS acquire_credentials_handle( UNICODE_STRING *principal_us, gss_cred_usage_t cred_usage,
-    LSA_SEC_HANDLE *credential, TimeStamp *ts_expiry )
-{
-    OM_uint32 ret, minor_status, expiry_time;
-    gss_name_t principal = GSS_C_NO_NAME;
-    gss_cred_id_t cred_handle;
-    NTSTATUS status;
-
-    if (principal_us && ((status = name_sspi_to_gss( principal_us, &principal )) != SEC_E_OK)) return status;
-
-    ret = pgss_acquire_cred( &minor_status, principal, 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, credential );
-        expirytime_gss_to_sspi( expiry_time, ts_expiry );
-    }
-
-    if (principal != GSS_C_NO_NAME) pgss_release_name( &minor_status, &principal );
-
-    return status_gss_to_sspi( ret );
-}
-#endif /* SONAME_LIBGSSAPI_KRB5 */
-
 static NTSTATUS NTAPI kerberos_SpAcquireCredentialsHandle(
     UNICODE_STRING *principal_us, ULONG credential_use, LUID *logon_id, void *auth_data,
-    void *get_key_fn, void *get_key_arg, LSA_SEC_HANDLE *credential, TimeStamp *ts_expiry )
+    void *get_key_fn, void *get_key_arg, LSA_SEC_HANDLE *credential, TimeStamp *expiry )
 {
-#ifdef SONAME_LIBGSSAPI_KRB5
-    gss_cred_usage_t cred_usage;
-    NTSTATUS status;
+    char *principal = NULL, *username = NULL,  *password = NULL;
+    SEC_WINNT_AUTH_IDENTITY_W *id = auth_data;
+    NTSTATUS status = SEC_E_INSUFFICIENT_MEMORY;
 
     TRACE( "(%s 0x%08x %p %p %p %p %p %p)\n", debugstr_us(principal_us), credential_use,
-           logon_id, auth_data, get_key_fn, get_key_arg, credential, ts_expiry );
+           logon_id, auth_data, get_key_fn, get_key_arg, credential, expiry );
 
-    switch (credential_use)
+    if (principal_us && !(principal = get_str_unixcp( principal_us ))) return SEC_E_INSUFFICIENT_MEMORY;
+    if (id)
     {
-    case SECPKG_CRED_INBOUND:
-        cred_usage = GSS_C_ACCEPT;
-        break;
-
-    case SECPKG_CRED_OUTBOUND:
-        if ((status = init_creds( auth_data )) != STATUS_SUCCESS) return status;
-        cred_usage = GSS_C_INITIATE;
-        break;
-
-    case SECPKG_CRED_BOTH:
-        cred_usage = GSS_C_BOTH;
-        break;
-
-    default:
-        return SEC_E_UNKNOWN_CREDENTIALS;
+        if (id->Flags & SEC_WINNT_AUTH_IDENTITY_ANSI)
+        {
+            FIXME( "ANSI identity not supported\n" );
+            status = SEC_E_UNSUPPORTED_FUNCTION;
+            goto done;
+        }
+        if (!(username = get_username_unixcp( id->User, id->UserLength, id->Domain, id->DomainLength ))) goto done;
+        if (!(password = get_password_unixcp( id->Password, id->PasswordLength ))) goto done;
     }
 
-    return acquire_credentials_handle( principal_us, cred_usage, credential, ts_expiry );
-#else
-    FIXME( "(%s 0x%08x %p %p %p %p %p %p)\n", debugstr_us(principal_us), credential_use,
-           logon_id, auth_data, get_key_fn, get_key_arg, credential, ts_expiry );
-    FIXME( "Wine was built without Kerberos support.\n" );
-    return SEC_E_UNSUPPORTED_FUNCTION;
-#endif
+    status = krb5_funcs->acquire_credentials_handle( principal, credential_use, username, password, credential,
+                                                     expiry );
+done:
+    heap_free( principal );
+    heap_free( username );
+    heap_free( password );
+    return status;
 }
 
 static NTSTATUS NTAPI kerberos_SpFreeCredentialsHandle( LSA_SEC_HANDLE credential )
 {
-#ifdef SONAME_LIBGSSAPI_KRB5
-    OM_uint32 ret, minor_status;
-    gss_cred_id_t cred_handle;
-
     TRACE( "(%lx)\n", credential );
-
     if (!credential) return SEC_E_INVALID_HANDLE;
-    if (!(cred_handle = credhandle_sspi_to_gss( credential ))) return SEC_E_OK;
-
-    ret = pgss_release_cred( &minor_status, &cred_handle );
-    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 );
-#else
-    FIXME( "(%lx)\n", credential );
-    return SEC_E_UNSUPPORTED_FUNCTION;
-#endif
+    return krb5_funcs->free_credentials_handle( credential );
 }
 
 static NTSTATUS NTAPI kerberos_SpInitLsaModeContext( LSA_SEC_HANDLE credential, LSA_SEC_HANDLE context,
@@ -1257,11 +1172,15 @@ static NTSTATUS NTAPI kerberos_SpInitialize(ULONG_PTR package_id, SECPKG_PARAMET
 {
     TRACE("%lu,%p,%p\n", package_id, params, lsa_function_table);
 
+    if (!krb5_funcs && __wine_init_unix_lib( instance, DLL_PROCESS_ATTACH, NULL, &krb5_funcs ))
+    {
+        WARN( "no Kerberos support\n" );
+        return STATUS_UNSUCCESSFUL;
+    }
 #ifdef SONAME_LIBGSSAPI_KRB5
     if (load_gssapi_krb5()) return STATUS_SUCCESS;
 #endif
-
-    return STATUS_UNSUCCESSFUL;
+    return STATUS_SUCCESS;
 }
 
 static NTSTATUS NTAPI kerberos_SpShutdown(void)
@@ -1644,3 +1563,17 @@ NTSTATUS NTAPI SpUserModeInitialize(ULONG lsa_version, PULONG package_version,
 
     return STATUS_SUCCESS;
 }
+
+BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, void *reserved )
+{
+    switch (reason)
+    {
+    case DLL_PROCESS_ATTACH:
+        instance = hinst;
+        DisableThreadLibraryCalls( hinst );
+        break;
+    case DLL_PROCESS_DETACH:
+        break;
+    }
+    return TRUE;
+}
diff --git a/dlls/kerberos/unixlib.c b/dlls/kerberos/unixlib.c
new file mode 100644
index 00000000000..7b15f00428a
--- /dev/null
+++ b/dlls/kerberos/unixlib.c
@@ -0,0 +1,402 @@
+/*
+ * 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 "wine/port.h"
+
+#include <stdarg.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 */
+    }
+}
+
+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 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_cred_id_t credhandle_sspi_to_gss( LSA_SEC_HANDLE handle )
+{
+    return (gss_cred_id_t)handle;
+}
+
+static inline void credhandle_gss_to_sspi( gss_cred_id_t handle, LSA_SEC_HANDLE *cred )
+{
+    *cred = (LSA_SEC_HANDLE)handle;
+}
+
+static void expirytime_gss_to_sspi( OM_uint32 expirytime, TimeStamp *timestamp )
+{
+    LARGE_INTEGER time;
+
+    NtQuerySystemTime( &time );
+    RtlSystemTimeToLocalTime( &time, &time );
+    timestamp->LowPart  = time.QuadPart;
+    timestamp->HighPart = time.QuadPart >> 32;
+}
+
+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 CDECL acquire_credentials_handle( const char *principal, ULONG credential_use, const char *username,
+                                                  const char *password, LSA_SEC_HANDLE *credential, TimeStamp *expiry )
+{
+    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 (credential_use)
+    {
+    case SECPKG_CRED_INBOUND:
+        cred_usage = GSS_C_ACCEPT;
+        break;
+
+    case SECPKG_CRED_OUTBOUND:
+        if ((status = init_creds( username, 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 (principal && (status = import_name( 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, credential );
+        expirytime_gss_to_sspi( expiry_time, expiry );
+    }
+
+    if (name != GSS_C_NO_NAME) pgss_release_name( &minor_status, &name );
+    return status_gss_to_sspi( ret );
+}
+
+static NTSTATUS CDECL free_credentials_handle( LSA_SEC_HANDLE handle )
+{
+    OM_uint32 ret, minor_status;
+    gss_cred_id_t cred = credhandle_sspi_to_gss( handle );
+
+    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 const struct krb5_funcs funcs =
+{
+    acquire_credentials_handle,
+    free_credentials_handle,
+};
+
+NTSTATUS CDECL __wine_init_unix_lib( HMODULE module, DWORD reason, const void *ptr_in, void *ptr_out )
+{
+    if (reason != DLL_PROCESS_ATTACH) return STATUS_SUCCESS;
+    if (load_krb5() && load_gssapi_krb5())
+    {
+        *(const struct krb5_funcs **)ptr_out = &funcs;
+        return STATUS_SUCCESS;
+    }
+    if (libkrb5_handle) unload_krb5();
+    return STATUS_DLL_NOT_FOUND;
+}
+#endif /* defined(SONAME_LIBKRB5) && defined(SONAME_LIBGSSAPI_KRB5) */
diff --git a/dlls/kerberos/unixlib.h b/dlls/kerberos/unixlib.h
new file mode 100644
index 00000000000..864c321c59d
--- /dev/null
+++ b/dlls/kerberos/unixlib.h
@@ -0,0 +1,29 @@
+/*
+ * 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
+ */
+
+struct krb5_funcs
+{
+    NTSTATUS (CDECL *acquire_credentials_handle)(const char *, ULONG, const char *, const char *, LSA_SEC_HANDLE *,
+                                                 TimeStamp *);
+    NTSTATUS (CDECL *free_credentials_handle)(LSA_SEC_HANDLE);
+};
+
+extern const struct krb5_funcs *krb5_funcs;
-- 
2.30.2




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