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bcrypt: Introduce export_gnutls_datum() helper and use it in export_gnutls_pubkey_rsa().

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Signed-off-by: Paul Gofman <pgofman@codeweavers.com>
Signed-off-by: Hans Leidekker <hans@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Paul Gofman 2021-01-18 12:38:23 +01:00 committed by Alexandre Julliard
parent aef2e01772
commit 88a1848ca4
1 changed files with 22 additions and 19 deletions
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41
dlls/bcrypt/gnutls.c
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@ -28,6 +28,7 @@
#ifdef HAVE_GNUTLS_CIPHER_INIT
#include <stdarg.h>
#include <assert.h>
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#include <gnutls/abstract.h>
@ -665,11 +666,27 @@ static void CDECL key_symmetric_destroy( struct key *key )
if (key_data(key)->cipher) pgnutls_cipher_deinit( key_data(key)->cipher );
}
static void export_gnutls_datum( UCHAR *buffer, ULONG length, gnutls_datum_t *d, ULONG *actual_length )
{
ULONG size = d->size;
UCHAR *src = d->data;
assert( size <= length + 1 );
if (size == length + 1)
{
assert(!src[0]);
++src;
--size;
}
*actual_length = size;
memcpy( buffer, src, size );
}
static NTSTATUS export_gnutls_pubkey_rsa( gnutls_privkey_t gnutls_key, ULONG bitlen, UCHAR **pubkey, ULONG *pubkey_len )
{
BCRYPT_RSAKEY_BLOB *rsa_blob;
gnutls_datum_t m, e;
UCHAR *dst, *src;
UCHAR *dst;
int ret;
if ((ret = pgnutls_privkey_export_rsa_raw( gnutls_key, &m, &e, NULL, NULL, NULL, NULL, NULL, NULL )))
@ -686,32 +703,18 @@ static NTSTATUS export_gnutls_pubkey_rsa( gnutls_privkey_t gnutls_key, ULONG bit
}
dst = (UCHAR *)(rsa_blob + 1);
if (e.size == bitlen / 8 + 1 && !e.data[0])
{
src = e.data + 1;
e.size--;
}
else src = e.data;
memcpy( dst, src, e.size );
export_gnutls_datum( dst, bitlen / 8, &e, &rsa_blob->cbPublicExp );
dst += e.size;
if (m.size == bitlen / 8 + 1 && !m.data[0])
{
src = m.data + 1;
m.size--;
}
else src = m.data;
memcpy( dst, src, m.size );
dst += rsa_blob->cbPublicExp;
export_gnutls_datum( dst, bitlen / 8, &m, &rsa_blob->cbModulus );
rsa_blob->Magic = BCRYPT_RSAPUBLIC_MAGIC;
rsa_blob->BitLength = bitlen;
rsa_blob->cbPublicExp = e.size;
rsa_blob->cbModulus = m.size;
rsa_blob->cbPrime1 = 0;
rsa_blob->cbPrime2 = 0;
*pubkey = (UCHAR *)rsa_blob;
*pubkey_len = sizeof(*rsa_blob) + e.size + m.size;
*pubkey_len = sizeof(*rsa_blob) + rsa_blob->cbPublicExp + rsa_blob->cbModulus;
free( e.data ); free( m.data );
return STATUS_SUCCESS;