PK: use wrappers and function pointers for verify

library/pk_wrap.c

@@ -0,0 +1,106 @@
+/*
+ *  Public Key abstraction layer: wrapper functions
+ *
+ *  Copyright (C) 2006-2013, Brainspark B.V.
+ *
+ *  This file is part of PolarSSL (http://www.polarssl.org)
+ *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "polarssl/config.h"
+
+#include "polarssl/pk_wrap.h"
+
+#if defined(POLARSSL_RSA_C)
+#include "polarssl/rsa.h"
+#endif
+
+#if defined(POLARSSL_ECP_C)
+#include "polarssl/ecp.h"
+#endif
+
+#if defined(POLARSSL_ECDSA_C)
+#include "polarssl/ecdsa.h"
+#endif
+
+#if defined(POLARSSL_RSA_C)
+static int rsa_verify_wrap( void *ctx,
+                   const unsigned char *hash, const md_info_t *md_info,
+                   const unsigned char *sig, size_t sig_len )
+{
+    ((void) sig_len);
+
+    return( rsa_pkcs1_verify( (rsa_context *) ctx,
+                RSA_PUBLIC, md_info->type, 0, hash, sig ) );
+}
+
+const pk_info_t rsa_info = {
+    POLARSSL_PK_RSA,
+    rsa_verify_wrap,
+};
+#endif /* POLARSSL_RSA_C */
+
+#if defined(POLARSSL_ECDSA_C)
+int ecdsa_verify_wrap( void *ctx,
+                       const unsigned char *hash, const md_info_t *md_info,
+                       const unsigned char *sig, size_t sig_len )
+{
+    return( ecdsa_read_signature( (ecdsa_context *) ctx,
+                hash, md_info->size, sig, sig_len ) );
+}
+
+const pk_info_t ecdsa_info = {
+    POLARSSL_PK_ECDSA,
+    ecdsa_verify_wrap,
+};
+#endif /* POLARSSL_ECDSA_C */
+
+#if defined(POLARSSL_ECP_C)
+static int eckey_verify_wrap( void *ctx,
+                       const unsigned char *hash, const md_info_t *md_info,
+                       const unsigned char *sig, size_t sig_len )
+{
+#if !defined(POLARSSL_ECDSA_C)
+    ((void) ctx);
+    ((void) hash);
+    ((void) md_info);
+    ((void) sig);
+    ((void) sig_len);
+
+    return( POLARSSL_ERR_PK_TYPE_MISMATCH );
+#else
+    int ret;
+    ecdsa_context ecdsa;
+
+    ecdsa_init( &ecdsa );
+
+    ret = ecdsa_from_keypair( &ecdsa, ctx ) ||
+          ecdsa_verify_wrap( &ecdsa, hash, md_info, sig, sig_len );
+
+    ecdsa_free( &ecdsa );
+
+    return( ret );
+#endif /* POLARSSL_ECDSA_C */
+}
+
+const pk_info_t eckey_info = {
+    POLARSSL_PK_ECKEY,
+    eckey_verify_wrap,
+};
+#endif /* POLARSSL_ECP_C */