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bcrypt: Fix buffer size query in BCryptSignHash.

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Signed-off-by: Hans Leidekker <hans@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Hans Leidekker 2020-10-06 12:27:10 +02:00 committed by Alexandre Julliard
parent d29f424416
commit ab0a7d2a1b
1 changed files with 11 additions and 8 deletions
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19
dlls/bcrypt/gnutls.c
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@ -1415,9 +1415,9 @@ static NTSTATUS format_gnutls_signature( enum alg_id type, gnutls_datum_t signat
case ALG_ID_RSA:
case ALG_ID_RSA_SIGN:
{
if (output_len < signature.size) return STATUS_BUFFER_TOO_SMALL;
memcpy( output, signature.data, signature.size );
*ret_len = signature.size;
if (output_len < signature.size) return STATUS_BUFFER_TOO_SMALL;
if (output) memcpy( output, signature.data, signature.size );
return STATUS_SUCCESS;
}
case ALG_ID_ECDSA_P256:
@ -1435,6 +1435,7 @@ static NTSTATUS format_gnutls_signature( enum alg_id type, gnutls_datum_t signat
return STATUS_INTERNAL_ERROR;
}
*ret_len = sig_len;
if (output_len < sig_len) return STATUS_BUFFER_TOO_SMALL;
if (r.size % 2) /* remove prepended zero byte */
@ -1457,14 +1458,16 @@ static NTSTATUS format_gnutls_signature( enum alg_id type, gnutls_datum_t signat
return STATUS_INTERNAL_ERROR;
}
pad_size_r = (sig_len / 2) - r.size;
pad_size_s = (sig_len / 2) - s.size;
memset( output, 0, sig_len );
if (output)
{
pad_size_r = (sig_len / 2) - r.size;
pad_size_s = (sig_len / 2) - s.size;
memset( output, 0, sig_len );
memcpy( output + pad_size_r, r_data, r.size );
memcpy( output + (sig_len / 2) + pad_size_s, s_data, s.size );
memcpy( output + pad_size_r, r_data, r.size );
memcpy( output + (sig_len / 2) + pad_size_s, s_data, s.size );
}
*ret_len = sig_len;
free( r.data ); free( s.data );
return STATUS_SUCCESS;
}