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/*
* Copyright 2009 Henri Verbeet for CodeWeavers
* Copyright 2018 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
*
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#ifdef HAVE_GNUTLS_CIPHER_INIT
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#include <gnutls/abstract.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "ntsecapi.h"
#include "bcrypt.h"
#include "bcrypt_internal.h"
#include "wine/debug.h"
#include "wine/heap.h"
#include "wine/library.h"
#include "wine/unicode.h"
#ifdef HAVE_GNUTLS_CIPHER_INIT
WINE_DEFAULT_DEBUG_CHANNEL(bcrypt);
WINE_DECLARE_DEBUG_CHANNEL(winediag);
#if GNUTLS_VERSION_MAJOR < 3
#define GNUTLS_CIPHER_AES_192_CBC 92
#define GNUTLS_CIPHER_AES_128_GCM 93
#define GNUTLS_CIPHER_AES_256_GCM 94
#define GNUTLS_PK_ECC 4
#define GNUTLS_CURVE_TO_BITS(curve) (unsigned int)(((unsigned int)1<<31)|((unsigned int)(curve)))
typedef enum
{
GNUTLS_ECC_CURVE_INVALID,
GNUTLS_ECC_CURVE_SECP224R1,
GNUTLS_ECC_CURVE_SECP256R1,
GNUTLS_ECC_CURVE_SECP384R1,
GNUTLS_ECC_CURVE_SECP521R1,
} gnutls_ecc_curve_t;
#endif
/* Not present in gnutls version < 3.0 */
static int (*pgnutls_cipher_tag)(gnutls_cipher_hd_t, void *, size_t);
static int (*pgnutls_cipher_add_auth)(gnutls_cipher_hd_t, const void *, size_t);
static gnutls_sign_algorithm_t (*pgnutls_pk_to_sign)(gnutls_pk_algorithm_t, gnutls_digest_algorithm_t);
static int (*pgnutls_pubkey_import_ecc_raw)(gnutls_pubkey_t, gnutls_ecc_curve_t,
const gnutls_datum_t *, const gnutls_datum_t *);
static int (*pgnutls_privkey_import_ecc_raw)(gnutls_privkey_t, gnutls_ecc_curve_t, const gnutls_datum_t *,
const gnutls_datum_t *, const gnutls_datum_t *);
static int (*pgnutls_pubkey_verify_hash2)(gnutls_pubkey_t, gnutls_sign_algorithm_t, unsigned int,
const gnutls_datum_t *, const gnutls_datum_t *);
/* Not present in gnutls version < 2.11.0 */
static int (*pgnutls_pubkey_import_rsa_raw)(gnutls_pubkey_t key, const gnutls_datum_t *m, const gnutls_datum_t *e);
/* Not present in gnutls version < 3.3.0 */
static int (*pgnutls_privkey_export_ecc_raw)(gnutls_privkey_t, gnutls_ecc_curve_t *,
gnutls_datum_t *, gnutls_datum_t *, gnutls_datum_t *);
static int (*pgnutls_privkey_generate)(gnutls_privkey_t, gnutls_pk_algorithm_t, unsigned int, unsigned int);
static void *libgnutls_handle;
#define MAKE_FUNCPTR(f) static typeof(f) * p##f
MAKE_FUNCPTR(gnutls_cipher_decrypt2);
MAKE_FUNCPTR(gnutls_cipher_deinit);
MAKE_FUNCPTR(gnutls_cipher_encrypt2);
MAKE_FUNCPTR(gnutls_cipher_init);
MAKE_FUNCPTR(gnutls_global_deinit);
MAKE_FUNCPTR(gnutls_global_init);
MAKE_FUNCPTR(gnutls_global_set_log_function);
MAKE_FUNCPTR(gnutls_global_set_log_level);
MAKE_FUNCPTR(gnutls_perror);
MAKE_FUNCPTR(gnutls_privkey_deinit);
MAKE_FUNCPTR(gnutls_privkey_init);
MAKE_FUNCPTR(gnutls_pubkey_deinit);
MAKE_FUNCPTR(gnutls_pubkey_init);
#undef MAKE_FUNCPTR
static int compat_gnutls_cipher_tag(gnutls_cipher_hd_t handle, void *tag, size_t tag_size)
{
return GNUTLS_E_UNKNOWN_CIPHER_TYPE;
}
static int compat_gnutls_cipher_add_auth(gnutls_cipher_hd_t handle, const void *ptext, size_t ptext_size)
{
return GNUTLS_E_UNKNOWN_CIPHER_TYPE;
}
static int compat_gnutls_pubkey_import_ecc_raw(gnutls_pubkey_t key, gnutls_ecc_curve_t curve,
const gnutls_datum_t *x, const gnutls_datum_t *y)
{
return GNUTLS_E_UNKNOWN_PK_ALGORITHM;
}
static int compat_gnutls_privkey_export_ecc_raw(gnutls_privkey_t key, gnutls_ecc_curve_t *curve,
gnutls_datum_t *x, gnutls_datum_t *y, gnutls_datum_t *k)
{
return GNUTLS_E_UNKNOWN_PK_ALGORITHM;
}
static int compat_gnutls_privkey_import_ecc_raw(gnutls_privkey_t key, gnutls_ecc_curve_t curve,
const gnutls_datum_t *x, const gnutls_datum_t *y,
const gnutls_datum_t *k)
{
return GNUTLS_E_UNKNOWN_PK_ALGORITHM;
}
static gnutls_sign_algorithm_t compat_gnutls_pk_to_sign(gnutls_pk_algorithm_t pk, gnutls_digest_algorithm_t hash)
{
return GNUTLS_SIGN_UNKNOWN;
}
static int compat_gnutls_pubkey_verify_hash2(gnutls_pubkey_t key, gnutls_sign_algorithm_t algo,
unsigned int flags, const gnutls_datum_t *hash,
const gnutls_datum_t *signature)
{
return GNUTLS_E_UNKNOWN_PK_ALGORITHM;
}
static int compat_gnutls_pubkey_import_rsa_raw(gnutls_pubkey_t key, const gnutls_datum_t *m, const gnutls_datum_t *e)
{
return GNUTLS_E_UNKNOWN_PK_ALGORITHM;
}
static int compat_gnutls_privkey_generate(gnutls_privkey_t key, gnutls_pk_algorithm_t algo, unsigned int bits,
unsigned int flags)
{
return GNUTLS_E_UNKNOWN_PK_ALGORITHM;
}
static void gnutls_log( int level, const char *msg )
{
TRACE( "<%d> %s", level, msg );
}
BOOL gnutls_initialize(void)
{
int ret;
if (!(libgnutls_handle = wine_dlopen( SONAME_LIBGNUTLS, RTLD_NOW, NULL, 0 )))
{
ERR_(winediag)( "failed to load libgnutls, no support for encryption\n" );
return FALSE;
}
#define LOAD_FUNCPTR(f) \
if (!(p##f = wine_dlsym( libgnutls_handle, #f, NULL, 0 ))) \
{ \
ERR( "failed to load %s\n", #f ); \
goto fail; \
}
LOAD_FUNCPTR(gnutls_cipher_decrypt2)
LOAD_FUNCPTR(gnutls_cipher_deinit)
LOAD_FUNCPTR(gnutls_cipher_encrypt2)
LOAD_FUNCPTR(gnutls_cipher_init)
LOAD_FUNCPTR(gnutls_global_deinit)
LOAD_FUNCPTR(gnutls_global_init)
LOAD_FUNCPTR(gnutls_global_set_log_function)
LOAD_FUNCPTR(gnutls_global_set_log_level)
LOAD_FUNCPTR(gnutls_perror)
LOAD_FUNCPTR(gnutls_privkey_deinit);
LOAD_FUNCPTR(gnutls_privkey_init);
LOAD_FUNCPTR(gnutls_pubkey_deinit);
LOAD_FUNCPTR(gnutls_pubkey_init);
#undef LOAD_FUNCPTR
if (!(pgnutls_cipher_tag = wine_dlsym( libgnutls_handle, "gnutls_cipher_tag", NULL, 0 )))
{
WARN("gnutls_cipher_tag not found\n");
pgnutls_cipher_tag = compat_gnutls_cipher_tag;
}
if (!(pgnutls_cipher_add_auth = wine_dlsym( libgnutls_handle, "gnutls_cipher_add_auth", NULL, 0 )))
{
WARN("gnutls_cipher_add_auth not found\n");
pgnutls_cipher_add_auth = compat_gnutls_cipher_add_auth;
}
if ((ret = pgnutls_global_init()) != GNUTLS_E_SUCCESS)
{
pgnutls_perror( ret );
goto fail;
}
if (!(pgnutls_pubkey_import_ecc_raw = wine_dlsym( libgnutls_handle, "gnutls_pubkey_import_ecc_raw", NULL, 0 )))
{
WARN("gnutls_pubkey_import_ecc_raw not found\n");
pgnutls_pubkey_import_ecc_raw = compat_gnutls_pubkey_import_ecc_raw;
}
if (!(pgnutls_privkey_export_ecc_raw = wine_dlsym( libgnutls_handle, "gnutls_privkey_export_ecc_raw", NULL, 0 )))
{
WARN("gnutls_privkey_export_ecc_raw not found\n");
pgnutls_privkey_export_ecc_raw = compat_gnutls_privkey_export_ecc_raw;
}
if (!(pgnutls_privkey_import_ecc_raw = wine_dlsym( libgnutls_handle, "gnutls_privkey_import_ecc_raw", NULL, 0 )))
{
WARN("gnutls_privkey_import_ecc_raw not found\n");
pgnutls_privkey_import_ecc_raw = compat_gnutls_privkey_import_ecc_raw;
}
if (!(pgnutls_pk_to_sign = wine_dlsym( libgnutls_handle, "gnutls_pk_to_sign", NULL, 0 )))
{
WARN("gnutls_pk_to_sign not found\n");
pgnutls_pk_to_sign = compat_gnutls_pk_to_sign;
}
if (!(pgnutls_pubkey_verify_hash2 = wine_dlsym( libgnutls_handle, "gnutls_pubkey_verify_hash2", NULL, 0 )))
{
WARN("gnutls_pubkey_verify_hash2 not found\n");
pgnutls_pubkey_verify_hash2 = compat_gnutls_pubkey_verify_hash2;
}
if (!(pgnutls_pubkey_import_rsa_raw = wine_dlsym( libgnutls_handle, "gnutls_pubkey_import_rsa_raw", NULL, 0 )))
{
WARN("gnutls_pubkey_import_rsa_raw not found\n");
pgnutls_pubkey_import_rsa_raw = compat_gnutls_pubkey_import_rsa_raw;
}
if (!(pgnutls_privkey_generate = wine_dlsym( libgnutls_handle, "gnutls_privkey_generate", NULL, 0 )))
{
WARN("gnutls_privkey_generate not found\n");
pgnutls_privkey_generate = compat_gnutls_privkey_generate;
}
if (TRACE_ON( bcrypt ))
{
pgnutls_global_set_log_level( 4 );
pgnutls_global_set_log_function( gnutls_log );
}
return TRUE;
fail:
wine_dlclose( libgnutls_handle, NULL, 0 );
libgnutls_handle = NULL;
return FALSE;
}
void gnutls_uninitialize(void)
{
pgnutls_global_deinit();
wine_dlclose( libgnutls_handle, NULL, 0 );
libgnutls_handle = NULL;
}
struct buffer
{
BYTE *buffer;
DWORD length;
DWORD pos;
BOOL error;
};
static void buffer_init( struct buffer *buffer )
{
buffer->buffer = NULL;
buffer->length = 0;
buffer->pos = 0;
buffer->error = FALSE;
}
static void buffer_free( struct buffer *buffer )
{
heap_free( buffer->buffer );
}
static void buffer_append( struct buffer *buffer, BYTE *data, DWORD len )
{
if (!len) return;
if (buffer->pos + len > buffer->length)
{
DWORD new_length = max( max( buffer->pos + len, buffer->length * 2 ), 64 );
BYTE *new_buffer;
if (!(new_buffer = heap_realloc( buffer->buffer, new_length )))
{
ERR( "out of memory\n" );
buffer->error = TRUE;
return;
}
buffer->buffer = new_buffer;
buffer->length = new_length;
}
memcpy( &buffer->buffer[buffer->pos], data, len );
buffer->pos += len;
}
static void buffer_append_byte( struct buffer *buffer, BYTE value )
{
buffer_append( buffer, &value, sizeof(value) );
}
static void buffer_append_asn1_length( struct buffer *buffer, DWORD length )
{
DWORD num_bytes;
if (length < 128)
{
buffer_append_byte( buffer, length );
return;
}
if (length <= 0xff) num_bytes = 1;
else if (length <= 0xffff) num_bytes = 2;
else if (length <= 0xffffff) num_bytes = 3;
else num_bytes = 4;
buffer_append_byte( buffer, 0x80 | num_bytes );
while (num_bytes--) buffer_append_byte( buffer, length >> (num_bytes * 8) );
}
static void buffer_append_asn1_integer( struct buffer *buffer, BYTE *data, DWORD len )
{
DWORD leading_zero = (*data & 0x80) != 0;
buffer_append_byte( buffer, 0x02 ); /* tag */
buffer_append_asn1_length( buffer, len + leading_zero );
if (leading_zero) buffer_append_byte( buffer, 0 );
buffer_append( buffer, data, len );
}
static void buffer_append_asn1_sequence( struct buffer *buffer, struct buffer *content )
{
if (content->error)
{
buffer->error = TRUE;
return;
}
buffer_append_byte( buffer, 0x30 ); /* tag */
buffer_append_asn1_length( buffer, content->pos );
buffer_append( buffer, content->buffer, content->pos );
}
static void buffer_append_asn1_r_s( struct buffer *buffer, BYTE *r, DWORD r_len, BYTE *s, DWORD s_len )
{
struct buffer value;
buffer_init( &value );
buffer_append_asn1_integer( &value, r, r_len );
buffer_append_asn1_integer( &value, s, s_len );
buffer_append_asn1_sequence( buffer, &value );
buffer_free( &value );
}
NTSTATUS key_set_property( struct key *key, const WCHAR *prop, UCHAR *value, ULONG size, ULONG flags )
{
if (!strcmpW( prop, BCRYPT_CHAINING_MODE ))
{
if (!strcmpW( (WCHAR *)value, BCRYPT_CHAIN_MODE_ECB ))
{
key->u.s.mode = MODE_ID_ECB;
return STATUS_SUCCESS;
}
else if (!strcmpW( (WCHAR *)value, BCRYPT_CHAIN_MODE_CBC ))
{
key->u.s.mode = MODE_ID_CBC;
return STATUS_SUCCESS;
}
else if (!strcmpW( (WCHAR *)value, BCRYPT_CHAIN_MODE_GCM ))
{
key->u.s.mode = MODE_ID_GCM;
return STATUS_SUCCESS;
}
else
{
FIXME( "unsupported mode %s\n", debugstr_w((WCHAR *)value) );
return STATUS_NOT_IMPLEMENTED;
}
}
FIXME( "unsupported key property %s\n", debugstr_w(prop) );
return STATUS_NOT_IMPLEMENTED;
}
static ULONG get_block_size( struct algorithm *alg )
{
ULONG ret = 0, size = sizeof(ret);
get_alg_property( alg, BCRYPT_BLOCK_LENGTH, (UCHAR *)&ret, sizeof(ret), &size );
return ret;
}
NTSTATUS key_symmetric_init( struct key *key, struct algorithm *alg, const UCHAR *secret, ULONG secret_len )
{
if (!libgnutls_handle) return STATUS_INTERNAL_ERROR;
switch (alg->id)
{
case ALG_ID_AES:
break;
default:
FIXME( "algorithm %u not supported\n", alg->id );
return STATUS_NOT_SUPPORTED;
}
if (!(key->u.s.block_size = get_block_size( alg ))) return STATUS_INVALID_PARAMETER;
if (!(key->u.s.secret = heap_alloc( secret_len ))) return STATUS_NO_MEMORY;
memcpy( key->u.s.secret, secret, secret_len );
key->u.s.secret_len = secret_len;
key->alg_id = alg->id;
key->u.s.mode = alg->mode;
key->u.s.handle = 0; /* initialized on first use */
return STATUS_SUCCESS;
}
static gnutls_cipher_algorithm_t get_gnutls_cipher( const struct key *key )
{
switch (key->alg_id)
{
case ALG_ID_AES:
WARN( "handle block size\n" );
switch (key->u.s.mode)
{
case MODE_ID_GCM:
if (key->u.s.secret_len == 16) return GNUTLS_CIPHER_AES_128_GCM;
if (key->u.s.secret_len == 32) return GNUTLS_CIPHER_AES_256_GCM;
break;
case MODE_ID_ECB: /* can be emulated with CBC + empty IV */
case MODE_ID_CBC:
if (key->u.s.secret_len == 16) return GNUTLS_CIPHER_AES_128_CBC;
if (key->u.s.secret_len == 24) return GNUTLS_CIPHER_AES_192_CBC;
if (key->u.s.secret_len == 32) return GNUTLS_CIPHER_AES_256_CBC;
break;
default:
break;
}
FIXME( "AES mode %u with key length %u not supported\n", key->u.s.mode, key->u.s.secret_len );
return GNUTLS_CIPHER_UNKNOWN;
default:
FIXME( "algorithm %u not supported\n", key->alg_id );
return GNUTLS_CIPHER_UNKNOWN;
}
}
NTSTATUS key_symmetric_set_params( struct key *key, UCHAR *iv, ULONG iv_len )
{
gnutls_cipher_algorithm_t cipher;
gnutls_datum_t secret, vector;
int ret;
if (key->u.s.handle)
{
pgnutls_cipher_deinit( key->u.s.handle );
key->u.s.handle = NULL;
}
if ((cipher = get_gnutls_cipher( key )) == GNUTLS_CIPHER_UNKNOWN)
return STATUS_NOT_SUPPORTED;
secret.data = key->u.s.secret;
secret.size = key->u.s.secret_len;
if (iv)
{
vector.data = iv;
vector.size = iv_len;
}
if ((ret = pgnutls_cipher_init( &key->u.s.handle, cipher, &secret, iv ? &vector : NULL )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
return STATUS_SUCCESS;
}
NTSTATUS key_symmetric_set_auth_data( struct key *key, UCHAR *auth_data, ULONG len )
{
int ret;
if (!auth_data) return STATUS_SUCCESS;
if ((ret = pgnutls_cipher_add_auth( key->u.s.handle, auth_data, len )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
return STATUS_SUCCESS;
}
NTSTATUS key_symmetric_encrypt( struct key *key, const UCHAR *input, ULONG input_len, UCHAR *output, ULONG output_len )
{
int ret;
if ((ret = pgnutls_cipher_encrypt2( key->u.s.handle, input, input_len, output, output_len )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
return STATUS_SUCCESS;
}
NTSTATUS key_symmetric_decrypt( struct key *key, const UCHAR *input, ULONG input_len, UCHAR *output, ULONG output_len )
{
int ret;
if ((ret = pgnutls_cipher_decrypt2( key->u.s.handle, input, input_len, output, output_len )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
return STATUS_SUCCESS;
}
NTSTATUS key_symmetric_get_tag( struct key *key, UCHAR *tag, ULONG len )
{
int ret;
if ((ret = pgnutls_cipher_tag( key->u.s.handle, tag, len )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
return STATUS_SUCCESS;
}
static NTSTATUS export_gnutls_pubkey_ecc( gnutls_privkey_t gnutls_key, UCHAR **pubkey, ULONG *pubkey_len )
{
BCRYPT_ECCKEY_BLOB *ecc_blob;
gnutls_ecc_curve_t curve;
gnutls_datum_t x, y;
DWORD magic, size;
UCHAR *src, *dst;
int ret;
if ((ret = pgnutls_privkey_export_ecc_raw( gnutls_key, &curve, &x, &y, NULL )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
switch (curve)
{
case GNUTLS_ECC_CURVE_SECP256R1:
magic = BCRYPT_ECDH_PUBLIC_P256_MAGIC;
size = 32;
break;
default:
FIXME( "curve %u not supported\n", curve );
free( x.data ); free( y.data );
return STATUS_NOT_IMPLEMENTED;
}
if (!(ecc_blob = heap_alloc( sizeof(*ecc_blob) + x.size + y.size )))
{
pgnutls_perror( ret );
free( x.data ); free( y.data );
return STATUS_NO_MEMORY;
}
ecc_blob->dwMagic = magic;
ecc_blob->cbKey = size;
dst = (UCHAR *)(ecc_blob + 1);
if (x.size == size + 1) src = x.data + 1;
else src = x.data;
memcpy( dst, src, size );
dst += size;
if (y.size == size + 1) src = y.data + 1;
else src = y.data;
memcpy( dst, src, size );
*pubkey = (UCHAR *)ecc_blob;
*pubkey_len = sizeof(*ecc_blob) + ecc_blob->cbKey * 2;
free( x.data ); free( y.data );
return STATUS_SUCCESS;
}
NTSTATUS key_asymmetric_generate( struct key *key )
{
gnutls_pk_algorithm_t pk_alg;
gnutls_ecc_curve_t curve;
gnutls_privkey_t handle;
NTSTATUS status;
int ret;
if (!libgnutls_handle) return STATUS_INTERNAL_ERROR;
switch (key->alg_id)
{
case ALG_ID_ECDH_P256:
pk_alg = GNUTLS_PK_ECC; /* compatible with ECDSA and ECDH */
curve = GNUTLS_ECC_CURVE_SECP256R1;
break;
default:
FIXME( "algorithm %u not supported\n", key->alg_id );
return STATUS_NOT_SUPPORTED;
}
if ((ret = pgnutls_privkey_init( &handle )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
if ((ret = pgnutls_privkey_generate( handle, pk_alg, GNUTLS_CURVE_TO_BITS(curve), 0 )))
{
pgnutls_perror( ret );
pgnutls_privkey_deinit( handle );
return STATUS_INTERNAL_ERROR;
}
if ((status = export_gnutls_pubkey_ecc( handle, &key->u.a.pubkey, &key->u.a.pubkey_len )))
{
pgnutls_privkey_deinit( handle );
return status;
}
key->u.a.handle = handle;
return STATUS_SUCCESS;
}
NTSTATUS key_export_ecc( struct key *key, UCHAR *buf, ULONG len, ULONG *ret_len )
{
BCRYPT_ECCKEY_BLOB *ecc_blob;
gnutls_ecc_curve_t curve;
gnutls_datum_t x, y, d;
DWORD magic, size;
UCHAR *src, *dst;
int ret;
if ((ret = pgnutls_privkey_export_ecc_raw( key->u.a.handle, &curve, &x, &y, &d )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
switch (curve)
{
case GNUTLS_ECC_CURVE_SECP256R1:
magic = BCRYPT_ECDH_PRIVATE_P256_MAGIC;
size = 32;
break;
default:
FIXME( "curve %u not supported\n", curve );
free( x.data ); free( y.data ); free( d.data );
return STATUS_NOT_IMPLEMENTED;
}
*ret_len = sizeof(*ecc_blob) + size * 3;
if (len >= *ret_len && buf)
{
ecc_blob = (BCRYPT_ECCKEY_BLOB *)buf;
ecc_blob->dwMagic = magic;
ecc_blob->cbKey = size;
dst = (UCHAR *)(ecc_blob + 1);
if (x.size == size + 1) src = x.data + 1;
else src = x.data;
memcpy( dst, src, size );
dst += size;
if (y.size == size + 1) src = y.data + 1;
else src = y.data;
memcpy( dst, src, size );
dst += size;
if (d.size == size + 1) src = d.data + 1;
else src = d.data;
memcpy( dst, src, size );
}
free( x.data ); free( y.data ); free( d.data );
return STATUS_SUCCESS;
}
NTSTATUS key_import_ecc( struct key *key, UCHAR *buf, ULONG len )
{
BCRYPT_ECCKEY_BLOB *ecc_blob;
gnutls_ecc_curve_t curve;
gnutls_privkey_t handle;
gnutls_datum_t x, y, k;
NTSTATUS status;
int ret;
switch (key->alg_id)
{
case ALG_ID_ECDH_P256:
curve = GNUTLS_ECC_CURVE_SECP256R1;
break;
default:
FIXME( "algorithm %u not yet supported\n", key->alg_id );
return STATUS_NOT_IMPLEMENTED;
}
if ((ret = pgnutls_privkey_init( &handle )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
ecc_blob = (BCRYPT_ECCKEY_BLOB *)buf;
x.data = (unsigned char *)(ecc_blob + 1);
x.size = ecc_blob->cbKey;
y.data = x.data + ecc_blob->cbKey;
y.size = ecc_blob->cbKey;
k.data = y.data + ecc_blob->cbKey;
k.size = ecc_blob->cbKey;
if ((ret = pgnutls_privkey_import_ecc_raw( handle, curve, &x, &y, &k )))
{
pgnutls_perror( ret );
pgnutls_privkey_deinit( handle );
return STATUS_INTERNAL_ERROR;
}
if ((status = export_gnutls_pubkey_ecc( handle, &key->u.a.pubkey, &key->u.a.pubkey_len )))
{
pgnutls_privkey_deinit( handle );
return status;
}
key->u.a.handle = handle;
return STATUS_SUCCESS;
}
NTSTATUS key_asymmetric_init( struct key *key, struct algorithm *alg, const UCHAR *pubkey, ULONG pubkey_len )
{
if (!libgnutls_handle) return STATUS_INTERNAL_ERROR;
switch (alg->id)
{
case ALG_ID_ECDH_P256:
case ALG_ID_ECDSA_P256:
case ALG_ID_ECDSA_P384:
case ALG_ID_RSA:
break;
default:
FIXME( "algorithm %u not supported\n", alg->id );
return STATUS_NOT_SUPPORTED;
}
if (pubkey_len)
{
if (!(key->u.a.pubkey = heap_alloc( pubkey_len ))) return STATUS_NO_MEMORY;
memcpy( key->u.a.pubkey, pubkey, pubkey_len );
key->u.a.pubkey_len = pubkey_len;
}
key->alg_id = alg->id;
return STATUS_SUCCESS;
}
static NTSTATUS import_gnutls_pubkey_ecc( struct key *key, gnutls_pubkey_t *gnutls_key )
{
BCRYPT_ECCKEY_BLOB *ecc_blob;
gnutls_ecc_curve_t curve;
gnutls_datum_t x, y;
int ret;
switch (key->alg_id)
{
case ALG_ID_ECDSA_P256: curve = GNUTLS_ECC_CURVE_SECP256R1; break;
case ALG_ID_ECDSA_P384: curve = GNUTLS_ECC_CURVE_SECP384R1; break;
default:
FIXME( "algorithm %u not yet supported\n", key->alg_id );
return STATUS_NOT_IMPLEMENTED;
}
if ((ret = pgnutls_pubkey_init( gnutls_key )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
ecc_blob = (BCRYPT_ECCKEY_BLOB *)key->u.a.pubkey;
x.data = key->u.a.pubkey + sizeof(*ecc_blob);
x.size = ecc_blob->cbKey;
y.data = key->u.a.pubkey + sizeof(*ecc_blob) + ecc_blob->cbKey;
y.size = ecc_blob->cbKey;
if ((ret = pgnutls_pubkey_import_ecc_raw( *gnutls_key, curve, &x, &y )))
{
pgnutls_perror( ret );
pgnutls_pubkey_deinit( *gnutls_key );
return STATUS_INTERNAL_ERROR;
}
return STATUS_SUCCESS;
}
static NTSTATUS import_gnutls_pubkey_rsa( struct key *key, gnutls_pubkey_t *gnutls_key )
{
BCRYPT_RSAKEY_BLOB *rsa_blob;
gnutls_datum_t m, e;
int ret;
if ((ret = pgnutls_pubkey_init( gnutls_key )))
{
pgnutls_perror( ret );
return STATUS_INTERNAL_ERROR;
}
rsa_blob = (BCRYPT_RSAKEY_BLOB *)key->u.a.pubkey;
e.data = key->u.a.pubkey + sizeof(*rsa_blob);
e.size = rsa_blob->cbPublicExp;
m.data = key->u.a.pubkey + sizeof(*rsa_blob) + rsa_blob->cbPublicExp;
m.size = rsa_blob->cbModulus;
if ((ret = pgnutls_pubkey_import_rsa_raw( *gnutls_key, &m, &e )))
{
pgnutls_perror( ret );
pgnutls_pubkey_deinit( *gnutls_key );
return STATUS_INTERNAL_ERROR;
}
return STATUS_SUCCESS;
}
static NTSTATUS import_gnutls_pubkey( struct key *key, gnutls_pubkey_t *gnutls_key )
{
switch (key->alg_id)
{
case ALG_ID_ECDSA_P256:
case ALG_ID_ECDSA_P384:
return import_gnutls_pubkey_ecc( key, gnutls_key );
case ALG_ID_RSA:
return import_gnutls_pubkey_rsa( key, gnutls_key );
default:
FIXME("algorithm %u not yet supported\n", key->alg_id );
return STATUS_NOT_IMPLEMENTED;
}
}
static NTSTATUS prepare_gnutls_signature_ecc( struct key *key, UCHAR *signature, ULONG signature_len,
gnutls_datum_t *gnutls_signature )
{
struct buffer buffer;
DWORD r_len = signature_len / 2;
DWORD s_len = r_len;
BYTE *r = signature;
BYTE *s = signature + r_len;
buffer_init( &buffer );
buffer_append_asn1_r_s( &buffer, r, r_len, s, s_len );
if (buffer.error)
{
buffer_free( &buffer );
return STATUS_NO_MEMORY;
}
gnutls_signature->data = buffer.buffer;
gnutls_signature->size = buffer.pos;
return STATUS_SUCCESS;
}
static NTSTATUS prepare_gnutls_signature_rsa( struct key *key, UCHAR *signature, ULONG signature_len,
gnutls_datum_t *gnutls_signature )
{
gnutls_signature->data = signature;
gnutls_signature->size = signature_len;
return STATUS_SUCCESS;
}
static NTSTATUS prepare_gnutls_signature( struct key *key, UCHAR *signature, ULONG signature_len,
gnutls_datum_t *gnutls_signature )
{
switch (key->alg_id)
{
case ALG_ID_ECDSA_P256:
case ALG_ID_ECDSA_P384:
return prepare_gnutls_signature_ecc( key, signature, signature_len, gnutls_signature );
case ALG_ID_RSA:
return prepare_gnutls_signature_rsa( key, signature, signature_len, gnutls_signature );
default:
FIXME( "algorithm %u not yet supported\n", key->alg_id );
return STATUS_NOT_IMPLEMENTED;
}
}
NTSTATUS key_asymmetric_verify( struct key *key, void *padding, UCHAR *hash, ULONG hash_len, UCHAR *signature,
ULONG signature_len, DWORD flags )
{
gnutls_digest_algorithm_t hash_alg;
gnutls_sign_algorithm_t sign_alg;
gnutls_datum_t gnutls_hash, gnutls_signature;
gnutls_pk_algorithm_t pk_alg;
gnutls_pubkey_t gnutls_key;
NTSTATUS status;
int ret;
switch (key->alg_id)
{
case ALG_ID_ECDSA_P256:
case ALG_ID_ECDSA_P384:
{
if (flags) FIXME( "flags %08x not supported\n", flags );
/* only the hash size must match, not the actual hash function */
switch (hash_len)
{
case 32: hash_alg = GNUTLS_DIG_SHA256; break;
case 48: hash_alg = GNUTLS_DIG_SHA384; break;
default:
FIXME( "hash size %u not yet supported\n", hash_len );
return STATUS_INVALID_SIGNATURE;
}
pk_alg = GNUTLS_PK_ECC;
break;
}
case ALG_ID_RSA:
{
BCRYPT_PKCS1_PADDING_INFO *info = (BCRYPT_PKCS1_PADDING_INFO *)padding;
if (!(flags & BCRYPT_PAD_PKCS1) || !info) return STATUS_INVALID_PARAMETER;
if (!info->pszAlgId) return STATUS_INVALID_SIGNATURE;
if (!strcmpW( info->pszAlgId, BCRYPT_SHA1_ALGORITHM )) hash_alg = GNUTLS_DIG_SHA1;
else if (!strcmpW( info->pszAlgId, BCRYPT_SHA256_ALGORITHM )) hash_alg = GNUTLS_DIG_SHA256;
else if (!strcmpW( info->pszAlgId, BCRYPT_SHA384_ALGORITHM )) hash_alg = GNUTLS_DIG_SHA384;
else if (!strcmpW( info->pszAlgId, BCRYPT_SHA512_ALGORITHM )) hash_alg = GNUTLS_DIG_SHA512;
else
{
FIXME( "hash algorithm %s not supported\n", debugstr_w(info->pszAlgId) );
return STATUS_NOT_SUPPORTED;
}
pk_alg = GNUTLS_PK_RSA;
break;
}
default:
FIXME( "algorithm %u not yet supported\n", key->alg_id );
return STATUS_NOT_IMPLEMENTED;
}
if ((sign_alg = pgnutls_pk_to_sign( pk_alg, hash_alg )) == GNUTLS_SIGN_UNKNOWN)
{
FIXME("GnuTLS does not support algorithm %u with hash len %u\n", key->alg_id, hash_len );
return STATUS_NOT_IMPLEMENTED;
}
if ((status = import_gnutls_pubkey( key, &gnutls_key ))) return status;
if ((status = prepare_gnutls_signature( key, signature, signature_len, &gnutls_signature )))
{
pgnutls_pubkey_deinit( gnutls_key );
return status;
}
gnutls_hash.data = hash;
gnutls_hash.size = hash_len;
ret = pgnutls_pubkey_verify_hash2( gnutls_key, sign_alg, 0, &gnutls_hash, &gnutls_signature );
if (gnutls_signature.data != signature) heap_free( gnutls_signature.data );
pgnutls_pubkey_deinit( gnutls_key );
return (ret < 0) ? STATUS_INVALID_SIGNATURE : STATUS_SUCCESS;
}
NTSTATUS key_destroy( struct key *key )
{
if (key_is_symmetric( key ))
{
if (key->u.s.handle) pgnutls_cipher_deinit( key->u.s.handle );
heap_free( key->u.s.secret );
}
else
{
if (key->u.a.handle) pgnutls_privkey_deinit( key->u.a.handle );
heap_free( key->u.a.pubkey );
}
heap_free( key );
return STATUS_SUCCESS;
}
#endif
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