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bcrypt: Implement BCryptVerifySignature for ECDSA signatures. 

Signed-off-by: Hans Leidekker <hans@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Michael Müller 2018-03-26 15:04:34 +02:00 committed by Alexandre Julliard
parent 76b6c360fa
commit 19e0f97f71
2 changed files with 343 additions and 22 deletions
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341
dlls/bcrypt/bcrypt_main.c
View File

@ -27,6 +27,7 @@
#elif defined(HAVE_GNUTLS_CIPHER_INIT)
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#include <gnutls/abstract.h>
#endif
#include "ntstatus.h"
@ -50,9 +51,30 @@ static HINSTANCE instance;
#if defined(HAVE_GNUTLS_CIPHER_INIT) && !defined(HAVE_COMMONCRYPTO_COMMONCRYPTOR_H)
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
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 handle, void * tag, size_t tag_size);
static int (*pgnutls_cipher_add_auth)(gnutls_cipher_hd_t handle, const void *ptext, size_t ptext_size);
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 int (*pgnutls_pubkey_import_ecc_raw)(gnutls_pubkey_t, gnutls_ecc_curve_t,
const gnutls_datum_t *, const gnutls_datum_t *);
static gnutls_sign_algorithm_t (*pgnutls_pk_to_sign)(gnutls_pk_algorithm_t, gnutls_digest_algorithm_t);
static int (*pgnutls_pubkey_verify_hash2)(gnutls_pubkey_t, gnutls_sign_algorithm_t, unsigned int,
const gnutls_datum_t *, const gnutls_datum_t *);
static void *libgnutls_handle;
#define MAKE_FUNCPTR(f) static typeof(f) * p##f
@ -65,14 +87,10 @@ 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_pubkey_init);
MAKE_FUNCPTR(gnutls_pubkey_deinit);
#undef MAKE_FUNCPTR
#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
#endif
static int compat_gnutls_cipher_tag(gnutls_cipher_hd_t handle, void *tag, size_t tag_size)
{
return GNUTLS_E_UNKNOWN_CIPHER_TYPE;
@ -83,6 +101,24 @@ static int compat_gnutls_cipher_add_auth(gnutls_cipher_hd_t handle, const void *
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_CIPHER_TYPE;
}
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_CIPHER_TYPE;
}
static void gnutls_log( int level, const char *msg )
{
TRACE( "<%d> %s", level, msg );
@ -114,6 +150,8 @@ static BOOL gnutls_initialize(void)
LOAD_FUNCPTR(gnutls_global_set_log_function)
LOAD_FUNCPTR(gnutls_global_set_log_level)
LOAD_FUNCPTR(gnutls_perror)
LOAD_FUNCPTR(gnutls_pubkey_init);
LOAD_FUNCPTR(gnutls_pubkey_deinit);
#undef LOAD_FUNCPTR
if (!(pgnutls_cipher_tag = wine_dlsym( libgnutls_handle, "gnutls_cipher_tag", NULL, 0 )))
@ -132,6 +170,21 @@ static BOOL gnutls_initialize(void)
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_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 (TRACE_ON( bcrypt ))
{
@ -1206,6 +1259,257 @@ static NTSTATUS key_asymmetric_init( struct key *key, struct algorithm *alg, con
return STATUS_SUCCESS;
}
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 );
}
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( 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 );
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( 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 );
default:
FIXME( "algorithm %u not yet supported\n", key->alg_id );
return STATUS_NOT_IMPLEMENTED;
}
}
static 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;
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;
}
switch (key->alg_id)
{
case ALG_ID_ECDSA_P256:
case ALG_ID_ECDSA_P384:
pk_alg = GNUTLS_PK_ECC;
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 );
heap_free( gnutls_signature.data );
pgnutls_pubkey_deinit( gnutls_key );
return (ret < 0) ? STATUS_INVALID_SIGNATURE : STATUS_SUCCESS;
}
static NTSTATUS key_destroy( struct key *key )
{
if (key_is_symmetric( key ))
@ -1368,6 +1672,13 @@ static NTSTATUS key_symmetric_get_tag( struct key *key, UCHAR *tag, ULONG len )
return STATUS_NOT_IMPLEMENTED;
}
static NTSTATUS key_asymmetric_verify( struct key *key, void *padding, UCHAR *hash, ULONG hash_len,
UCHAR *signature, ULONG signature_len, DWORD flags )
{
FIXME( "not implemented on Mac\n" );
return STATUS_NOT_IMPLEMENTED;
}
static NTSTATUS key_destroy( struct key *key )
{
if (key->u.s.ref_encrypt) CCCryptorRelease( key->u.s.ref_encrypt );
@ -1433,6 +1744,13 @@ static NTSTATUS key_symmetric_get_tag( struct key *key, UCHAR *tag, ULONG len )
return STATUS_NOT_IMPLEMENTED;
}
static NTSTATUS key_asymmetric_verify( struct key *key, void *padding, UCHAR *hash, ULONG hash_len,
UCHAR *signature, ULONG signature_len, DWORD flags )
{
ERR( "support for keys not available at build time\n" );
return STATUS_NOT_IMPLEMENTED;
}
static NTSTATUS key_destroy( struct key *key )
{
ERR( "support for keys not available at build time\n" );
@ -1637,10 +1955,13 @@ NTSTATUS WINAPI BCryptVerifySignature( BCRYPT_KEY_HANDLE handle, void *padding,
{
struct key *key = handle;
FIXME( "%p, %p, %p, %u, %p, %u, %08x: stub!\n", handle, padding, hash, hash_len, signature, signature_len, flags );
TRACE( "%p, %p, %p, %u, %p, %u, %08x\n", handle, padding, hash, hash_len, signature, signature_len, flags );
if (!key || key->hdr.magic != MAGIC_KEY) return STATUS_INVALID_HANDLE;
return STATUS_NOT_IMPLEMENTED;
if (!hash || !hash_len || !signature || !signature_len) return STATUS_INVALID_PARAMETER;
if (key_is_symmetric( key )) return STATUS_NOT_SUPPORTED;
return key_asymmetric_verify( key, padding, hash, hash_len, signature, signature_len, flags );
}
NTSTATUS WINAPI BCryptDestroyKey( BCRYPT_KEY_HANDLE handle )

4
dlls/bcrypt/tests/bcrypt.c
View File

@ -1486,10 +1486,10 @@ static void test_ECDSA(void)
ok(!status, "BCryptImportKeyPair failed: %08x\n", status);
status = pBCryptVerifySignature(key, NULL, certHash, sizeof(certHash) - 1, certSignature, sizeof(certSignature), 0);
todo_wine ok(status == STATUS_INVALID_SIGNATURE, "Expected STATUS_INVALID_SIGNATURE, got %08x\n", status);
ok(status == STATUS_INVALID_SIGNATURE, "Expected STATUS_INVALID_SIGNATURE, got %08x\n", status);
status = pBCryptVerifySignature(key, NULL, certHash, sizeof(certHash), certSignature, sizeof(certSignature), 0);
todo_wine ok(!status, "BCryptVerifySignature failed: %08x\n", status);
ok(!status, "BCryptVerifySignature failed: %08x\n", status);
pBCryptDestroyKey(key);
pBCryptCloseAlgorithmProvider(alg, 0);