Diff: SSL/library/pk.c

Revision:

0:796d0f61a05b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SSL/library/pk.c	Thu Sep 27 06:34:22 2018 +0000
@@ -0,0 +1,296 @@
+/*
+ *  Public Key abstraction layer
+ *
+ *  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.
+ */
+
+#if !defined(POLARSSL_CONFIG_FILE)
+#include "polarssl/config.h"
+#else
+#include POLARSSL_CONFIG_FILE
+#endif
+
+#if defined(POLARSSL_PK_C)
+
+#include "polarssl/pk.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
+
+/*
+ * Initialise a pk_context
+ */
+void pk_init( pk_context *ctx )
+{
+    if( ctx == NULL )
+        return;
+
+    ctx->pk_info = NULL;
+    ctx->pk_ctx = NULL;
+}
+
+/*
+ * Free (the components of) a pk_context
+ */
+void pk_free( pk_context *ctx )
+{
+    if( ctx == NULL || ctx->pk_info == NULL)
+        return;
+
+    ctx->pk_info->ctx_free_func( ctx->pk_ctx );
+    ctx->pk_ctx = NULL;
+
+    ctx->pk_info = NULL;
+}
+
+/*
+ * Get pk_info structure from type
+ */
+const pk_info_t * pk_info_from_type( pk_type_t pk_type )
+{
+    switch( pk_type ) {
+#if defined(POLARSSL_RSA_C)
+        case POLARSSL_PK_RSA:
+            return &rsa_info;
+#endif
+#if defined(POLARSSL_ECP_C)
+        case POLARSSL_PK_ECKEY:
+            return &eckey_info;
+        case POLARSSL_PK_ECKEY_DH:
+            return &eckeydh_info;
+#endif
+#if defined(POLARSSL_ECDSA_C)
+        case POLARSSL_PK_ECDSA:
+            return &ecdsa_info;
+#endif
+        /* POLARSSL_PK_RSA_ALT omitted on purpose */
+        default:
+            return NULL;
+    }
+}
+
+/*
+ * Initialise context
+ */
+int pk_init_ctx( pk_context *ctx, const pk_info_t *info )
+{
+    if( ctx == NULL || info == NULL || ctx->pk_info != NULL )
+        return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
+
+    if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
+        return( POLARSSL_ERR_PK_MALLOC_FAILED );
+
+    ctx->pk_info = info;
+
+    return( 0 );
+}
+
+/*
+ * Initialize an RSA-alt context
+ */
+int pk_init_ctx_rsa_alt( pk_context *ctx, void * key,
+                         pk_rsa_alt_decrypt_func decrypt_func,
+                         pk_rsa_alt_sign_func sign_func,
+                         pk_rsa_alt_key_len_func key_len_func )
+{
+    rsa_alt_context *rsa_alt;
+    const pk_info_t *info = &rsa_alt_info;
+
+    if( ctx == NULL || ctx->pk_info != NULL )
+        return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
+
+    if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
+        return( POLARSSL_ERR_PK_MALLOC_FAILED );
+
+    ctx->pk_info = info;
+
+    rsa_alt = (rsa_alt_context *) ctx->pk_ctx;
+
+    rsa_alt->key = key;
+    rsa_alt->decrypt_func = decrypt_func;
+    rsa_alt->sign_func = sign_func;
+    rsa_alt->key_len_func = key_len_func;
+
+    return( 0 );
+}
+
+/*
+ * Tell if a PK can do the operations of the given type
+ */
+int pk_can_do( pk_context *ctx, pk_type_t type )
+{
+    /* null or NONE context can't do anything */
+    if( ctx == NULL || ctx->pk_info == NULL )
+        return( 0 );
+
+    return( ctx->pk_info->can_do( type ) );
+}
+
+/*
+ * Helper for pk_sign and pk_verify
+ */
+static inline int pk_hashlen_helper( md_type_t md_alg, size_t *hash_len )
+{
+    const md_info_t *md_info;
+
+    if( *hash_len != 0 )
+        return( 0 );
+
+    if( ( md_info = md_info_from_type( md_alg ) ) == NULL )
+        return( -1 );
+
+    *hash_len = md_info->size;
+    return( 0 );
+}
+
+/*
+ * Verify a signature
+ */
+int pk_verify( pk_context *ctx, md_type_t md_alg,
+               const unsigned char *hash, size_t hash_len,
+               const unsigned char *sig, size_t sig_len )
+{
+    if( ctx == NULL || ctx->pk_info == NULL ||
+        pk_hashlen_helper( md_alg, &hash_len ) != 0 )
+        return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
+
+    if( ctx->pk_info->verify_func == NULL )
+        return( POLARSSL_ERR_PK_TYPE_MISMATCH );
+
+    return( ctx->pk_info->verify_func( ctx->pk_ctx, md_alg, hash, hash_len,
+                                       sig, sig_len ) );
+}
+
+/*
+ * Make a signature
+ */
+int pk_sign( pk_context *ctx, md_type_t md_alg,
+             const unsigned char *hash, size_t hash_len,
+             unsigned char *sig, size_t *sig_len,
+             int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+{
+    if( ctx == NULL || ctx->pk_info == NULL ||
+        pk_hashlen_helper( md_alg, &hash_len ) != 0 )
+        return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
+
+    if( ctx->pk_info->sign_func == NULL )
+        return( POLARSSL_ERR_PK_TYPE_MISMATCH );
+
+    return( ctx->pk_info->sign_func( ctx->pk_ctx, md_alg, hash, hash_len,
+                                     sig, sig_len, f_rng, p_rng ) );
+}
+
+/*
+ * Decrypt message
+ */
+int pk_decrypt( pk_context *ctx,
+                const unsigned char *input, size_t ilen,
+                unsigned char *output, size_t *olen, size_t osize,
+                int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+{
+    if( ctx == NULL || ctx->pk_info == NULL )
+        return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
+
+    if( ctx->pk_info->decrypt_func == NULL )
+        return( POLARSSL_ERR_PK_TYPE_MISMATCH );
+
+    return( ctx->pk_info->decrypt_func( ctx->pk_ctx, input, ilen,
+                output, olen, osize, f_rng, p_rng ) );
+}
+
+/*
+ * Encrypt message
+ */
+int pk_encrypt( pk_context *ctx,
+                const unsigned char *input, size_t ilen,
+                unsigned char *output, size_t *olen, size_t osize,
+                int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+{
+    if( ctx == NULL || ctx->pk_info == NULL )
+        return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
+
+    if( ctx->pk_info->encrypt_func == NULL )
+        return( POLARSSL_ERR_PK_TYPE_MISMATCH );
+
+    return( ctx->pk_info->encrypt_func( ctx->pk_ctx, input, ilen,
+                output, olen, osize, f_rng, p_rng ) );
+}
+
+/*
+ * Get key size in bits
+ */
+size_t pk_get_size( const pk_context *ctx )
+{
+    if( ctx == NULL || ctx->pk_info == NULL )
+        return( 0 );
+
+    return( ctx->pk_info->get_size( ctx->pk_ctx ) );
+}
+
+/*
+ * Export debug information
+ */
+int pk_debug( const pk_context *ctx, pk_debug_item *items )
+{
+    if( ctx == NULL || ctx->pk_info == NULL )
+        return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
+
+    if( ctx->pk_info->debug_func == NULL )
+        return( POLARSSL_ERR_PK_TYPE_MISMATCH );
+
+    ctx->pk_info->debug_func( ctx->pk_ctx, items );
+    return( 0 );
+}
+
+/*
+ * Access the PK type name
+ */
+const char * pk_get_name( const pk_context *ctx )
+{
+    if( ctx == NULL || ctx->pk_info == NULL )
+        return( "invalid PK" );
+
+    return( ctx->pk_info->name );
+}
+
+/*
+ * Access the PK type
+ */
+pk_type_t pk_get_type( const pk_context *ctx )
+{
+    if( ctx == NULL || ctx->pk_info == NULL )
+        return( POLARSSL_PK_NONE );
+
+    return( ctx->pk_info->type );
+}
+
+#endif /* POLARSSL_PK_C */
+
+