--- /dev/null
+/*
+ * Public Key abstraction layer
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * 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.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_PK_C)
+#include "mbedtls/pk.h"
+#include "mbedtls/pk_internal.h"
+
+#include "mbedtls/platform_util.h"
+
+#if defined(MBEDTLS_RSA_C)
+#include "mbedtls/rsa.h"
+#endif
+#if defined(MBEDTLS_ECP_C)
+#include "mbedtls/ecp.h"
+#endif
+#if defined(MBEDTLS_ECDSA_C)
+#include "mbedtls/ecdsa.h"
+#endif
+
+#include <limits.h>
+#include <stdint.h>
+
+/*
+ * Initialise a mbedtls_pk_context
+ */
+void mbedtls_pk_init( mbedtls_pk_context *ctx )
+{
+ if( ctx == NULL )
+ return;
+
+ ctx->pk_info = NULL;
+ ctx->pk_ctx = NULL;
+}
+
+/*
+ * Free (the components of) a mbedtls_pk_context
+ */
+void mbedtls_pk_free( mbedtls_pk_context *ctx )
+{
+ if( ctx == NULL || ctx->pk_info == NULL )
+ return;
+
+ ctx->pk_info->ctx_free_func( ctx->pk_ctx );
+
+ mbedtls_platform_zeroize( ctx, sizeof( mbedtls_pk_context ) );
+}
+
+/*
+ * Get pk_info structure from type
+ */
+const mbedtls_pk_info_t * mbedtls_pk_info_from_type( mbedtls_pk_type_t pk_type )
+{
+ switch( pk_type ) {
+#if defined(MBEDTLS_RSA_C)
+ case MBEDTLS_PK_RSA:
+ return( &mbedtls_rsa_info );
+#endif
+#if defined(MBEDTLS_ECP_C)
+ case MBEDTLS_PK_ECKEY:
+ return( &mbedtls_eckey_info );
+ case MBEDTLS_PK_ECKEY_DH:
+ return( &mbedtls_eckeydh_info );
+#endif
+#if defined(MBEDTLS_ECDSA_C)
+ case MBEDTLS_PK_ECDSA:
+ return( &mbedtls_ecdsa_info );
+#endif
+ /* MBEDTLS_PK_RSA_ALT omitted on purpose */
+ default:
+ return( NULL );
+ }
+}
+
+/*
+ * Initialise context
+ */
+int mbedtls_pk_setup( mbedtls_pk_context *ctx, const mbedtls_pk_info_t *info )
+{
+ if( ctx == NULL || info == NULL || ctx->pk_info != NULL )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
+ return( MBEDTLS_ERR_PK_ALLOC_FAILED );
+
+ ctx->pk_info = info;
+
+ return( 0 );
+}
+
+#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
+/*
+ * Initialize an RSA-alt context
+ */
+int mbedtls_pk_setup_rsa_alt( mbedtls_pk_context *ctx, void * key,
+ mbedtls_pk_rsa_alt_decrypt_func decrypt_func,
+ mbedtls_pk_rsa_alt_sign_func sign_func,
+ mbedtls_pk_rsa_alt_key_len_func key_len_func )
+{
+ mbedtls_rsa_alt_context *rsa_alt;
+ const mbedtls_pk_info_t *info = &mbedtls_rsa_alt_info;
+
+ if( ctx == NULL || ctx->pk_info != NULL )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
+ return( MBEDTLS_ERR_PK_ALLOC_FAILED );
+
+ ctx->pk_info = info;
+
+ rsa_alt = (mbedtls_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 );
+}
+#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
+
+/*
+ * Tell if a PK can do the operations of the given type
+ */
+int mbedtls_pk_can_do( const mbedtls_pk_context *ctx, mbedtls_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 mbedtls_pk_sign and mbedtls_pk_verify
+ */
+static inline int pk_hashlen_helper( mbedtls_md_type_t md_alg, size_t *hash_len )
+{
+ const mbedtls_md_info_t *md_info;
+
+ if( *hash_len != 0 )
+ return( 0 );
+
+ if( ( md_info = mbedtls_md_info_from_type( md_alg ) ) == NULL )
+ return( -1 );
+
+ *hash_len = mbedtls_md_get_size( md_info );
+ return( 0 );
+}
+
+/*
+ * Verify a signature
+ */
+int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_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( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ if( ctx->pk_info->verify_func == NULL )
+ return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
+
+ return( ctx->pk_info->verify_func( ctx->pk_ctx, md_alg, hash, hash_len,
+ sig, sig_len ) );
+}
+
+/*
+ * Verify a signature with options
+ */
+int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
+ mbedtls_pk_context *ctx, mbedtls_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 )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ if( ! mbedtls_pk_can_do( ctx, type ) )
+ return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
+
+ if( type == MBEDTLS_PK_RSASSA_PSS )
+ {
+#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21)
+ int ret;
+ const mbedtls_pk_rsassa_pss_options *pss_opts;
+
+#if SIZE_MAX > UINT_MAX
+ if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+#endif /* SIZE_MAX > UINT_MAX */
+
+ if( options == NULL )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ pss_opts = (const mbedtls_pk_rsassa_pss_options *) options;
+
+ if( sig_len < mbedtls_pk_get_len( ctx ) )
+ return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
+
+ ret = mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_pk_rsa( *ctx ),
+ NULL, NULL, MBEDTLS_RSA_PUBLIC,
+ md_alg, (unsigned int) hash_len, hash,
+ pss_opts->mgf1_hash_id,
+ pss_opts->expected_salt_len,
+ sig );
+ if( ret != 0 )
+ return( ret );
+
+ if( sig_len > mbedtls_pk_get_len( ctx ) )
+ return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
+
+ return( 0 );
+#else
+ return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
+#endif /* MBEDTLS_RSA_C && MBEDTLS_PKCS1_V21 */
+ }
+
+ /* General case: no options */
+ if( options != NULL )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ return( mbedtls_pk_verify( ctx, md_alg, hash, hash_len, sig, sig_len ) );
+}
+
+/*
+ * Make a signature
+ */
+int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_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( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ if( ctx->pk_info->sign_func == NULL )
+ return( MBEDTLS_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 mbedtls_pk_decrypt( mbedtls_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( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ if( ctx->pk_info->decrypt_func == NULL )
+ return( MBEDTLS_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 mbedtls_pk_encrypt( mbedtls_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( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ if( ctx->pk_info->encrypt_func == NULL )
+ return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
+
+ return( ctx->pk_info->encrypt_func( ctx->pk_ctx, input, ilen,
+ output, olen, osize, f_rng, p_rng ) );
+}
+
+/*
+ * Check public-private key pair
+ */
+int mbedtls_pk_check_pair( const mbedtls_pk_context *pub, const mbedtls_pk_context *prv )
+{
+ if( pub == NULL || pub->pk_info == NULL ||
+ prv == NULL || prv->pk_info == NULL ||
+ prv->pk_info->check_pair_func == NULL )
+ {
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+ }
+
+ if( prv->pk_info->type == MBEDTLS_PK_RSA_ALT )
+ {
+ if( pub->pk_info->type != MBEDTLS_PK_RSA )
+ return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
+ }
+ else
+ {
+ if( pub->pk_info != prv->pk_info )
+ return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
+ }
+
+ return( prv->pk_info->check_pair_func( pub->pk_ctx, prv->pk_ctx ) );
+}
+
+/*
+ * Get key size in bits
+ */
+size_t mbedtls_pk_get_bitlen( const mbedtls_pk_context *ctx )
+{
+ if( ctx == NULL || ctx->pk_info == NULL )
+ return( 0 );
+
+ return( ctx->pk_info->get_bitlen( ctx->pk_ctx ) );
+}
+
+/*
+ * Export debug information
+ */
+int mbedtls_pk_debug( const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items )
+{
+ if( ctx == NULL || ctx->pk_info == NULL )
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+ if( ctx->pk_info->debug_func == NULL )
+ return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
+
+ ctx->pk_info->debug_func( ctx->pk_ctx, items );
+ return( 0 );
+}
+
+/*
+ * Access the PK type name
+ */
+const char *mbedtls_pk_get_name( const mbedtls_pk_context *ctx )
+{
+ if( ctx == NULL || ctx->pk_info == NULL )
+ return( "invalid PK" );
+
+ return( ctx->pk_info->name );
+}
+
+/*
+ * Access the PK type
+ */
+mbedtls_pk_type_t mbedtls_pk_get_type( const mbedtls_pk_context *ctx )
+{
+ if( ctx == NULL || ctx->pk_info == NULL )
+ return( MBEDTLS_PK_NONE );
+
+ return( ctx->pk_info->type );
+}
+
+#endif /* MBEDTLS_PK_C */
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