[398] | 1 | /*
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| 2 | * Public Key abstraction layer
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| 3 | *
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| 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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| 5 | * SPDX-License-Identifier: Apache-2.0
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| 6 | *
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| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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| 8 | * not use this file except in compliance with the License.
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| 9 | * You may obtain a copy of the License at
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| 10 | *
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| 11 | * http://www.apache.org/licenses/LICENSE-2.0
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| 12 | *
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| 13 | * Unless required by applicable law or agreed to in writing, software
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| 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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| 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 16 | * See the License for the specific language governing permissions and
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| 17 | * limitations under the License.
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| 18 | *
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| 19 | * This file is part of mbed TLS (https://tls.mbed.org)
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| 20 | */
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| 21 |
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| 22 | #if !defined(MBEDTLS_CONFIG_FILE)
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| 23 | #include "mbedtls/config.h"
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| 24 | #else
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| 25 | #include MBEDTLS_CONFIG_FILE
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| 26 | #endif
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| 27 |
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| 28 | #if defined(MBEDTLS_PK_C)
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| 29 | #include "mbedtls/pk.h"
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| 30 | #include "mbedtls/pk_internal.h"
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| 31 |
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| 32 | #include "mbedtls/platform_util.h"
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| 33 |
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| 34 | #if defined(MBEDTLS_RSA_C)
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| 35 | #include "mbedtls/rsa.h"
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| 36 | #endif
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| 37 | #if defined(MBEDTLS_ECP_C)
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| 38 | #include "mbedtls/ecp.h"
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| 39 | #endif
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| 40 | #if defined(MBEDTLS_ECDSA_C)
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| 41 | #include "mbedtls/ecdsa.h"
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| 42 | #endif
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| 43 |
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| 44 | #include <limits.h>
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| 45 | #include <stdint.h>
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| 46 |
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| 47 | /* Parameter validation macros based on platform_util.h */
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| 48 | #define PK_VALIDATE_RET( cond ) \
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| 49 | MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_PK_BAD_INPUT_DATA )
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| 50 | #define PK_VALIDATE( cond ) \
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| 51 | MBEDTLS_INTERNAL_VALIDATE( cond )
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| 52 |
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| 53 | /*
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| 54 | * Initialise a mbedtls_pk_context
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| 55 | */
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| 56 | void mbedtls_pk_init( mbedtls_pk_context *ctx )
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| 57 | {
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| 58 | PK_VALIDATE( ctx != NULL );
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| 59 |
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| 60 | ctx->pk_info = NULL;
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| 61 | ctx->pk_ctx = NULL;
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| 62 | }
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| 63 |
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| 64 | /*
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| 65 | * Free (the components of) a mbedtls_pk_context
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| 66 | */
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| 67 | void mbedtls_pk_free( mbedtls_pk_context *ctx )
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| 68 | {
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| 69 | if( ctx == NULL )
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| 70 | return;
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| 71 |
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| 72 | if ( ctx->pk_info != NULL )
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| 73 | ctx->pk_info->ctx_free_func( ctx->pk_ctx );
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| 74 |
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| 75 | mbedtls_platform_zeroize( ctx, sizeof( mbedtls_pk_context ) );
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| 76 | }
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| 77 |
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| 78 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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| 79 | /*
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| 80 | * Initialize a restart context
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| 81 | */
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| 82 | void mbedtls_pk_restart_init( mbedtls_pk_restart_ctx *ctx )
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| 83 | {
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| 84 | PK_VALIDATE( ctx != NULL );
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| 85 | ctx->pk_info = NULL;
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| 86 | ctx->rs_ctx = NULL;
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| 87 | }
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| 88 |
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| 89 | /*
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| 90 | * Free the components of a restart context
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| 91 | */
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| 92 | void mbedtls_pk_restart_free( mbedtls_pk_restart_ctx *ctx )
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| 93 | {
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| 94 | if( ctx == NULL || ctx->pk_info == NULL ||
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| 95 | ctx->pk_info->rs_free_func == NULL )
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| 96 | {
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| 97 | return;
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| 98 | }
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| 99 |
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| 100 | ctx->pk_info->rs_free_func( ctx->rs_ctx );
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| 101 |
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| 102 | ctx->pk_info = NULL;
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| 103 | ctx->rs_ctx = NULL;
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| 104 | }
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| 105 | #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
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| 106 |
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| 107 | /*
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| 108 | * Get pk_info structure from type
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| 109 | */
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| 110 | const mbedtls_pk_info_t * mbedtls_pk_info_from_type( mbedtls_pk_type_t pk_type )
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| 111 | {
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| 112 | switch( pk_type ) {
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| 113 | #if defined(MBEDTLS_RSA_C)
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| 114 | case MBEDTLS_PK_RSA:
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| 115 | return( &mbedtls_rsa_info );
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| 116 | #endif
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| 117 | #if defined(MBEDTLS_ECP_C)
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| 118 | case MBEDTLS_PK_ECKEY:
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| 119 | return( &mbedtls_eckey_info );
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| 120 | case MBEDTLS_PK_ECKEY_DH:
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| 121 | return( &mbedtls_eckeydh_info );
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| 122 | #endif
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| 123 | #if defined(MBEDTLS_ECDSA_C)
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| 124 | case MBEDTLS_PK_ECDSA:
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| 125 | return( &mbedtls_ecdsa_info );
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| 126 | #endif
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| 127 | /* MBEDTLS_PK_RSA_ALT omitted on purpose */
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| 128 | default:
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| 129 | return( NULL );
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| 130 | }
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| 131 | }
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| 132 |
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| 133 | /*
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| 134 | * Initialise context
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| 135 | */
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| 136 | int mbedtls_pk_setup( mbedtls_pk_context *ctx, const mbedtls_pk_info_t *info )
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| 137 | {
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| 138 | PK_VALIDATE_RET( ctx != NULL );
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| 139 | if( info == NULL || ctx->pk_info != NULL )
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| 140 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 141 |
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| 142 | if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
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| 143 | return( MBEDTLS_ERR_PK_ALLOC_FAILED );
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| 144 |
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| 145 | ctx->pk_info = info;
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| 146 |
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| 147 | return( 0 );
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| 148 | }
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| 149 |
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| 150 | #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
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| 151 | /*
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| 152 | * Initialize an RSA-alt context
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| 153 | */
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| 154 | int mbedtls_pk_setup_rsa_alt( mbedtls_pk_context *ctx, void * key,
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| 155 | mbedtls_pk_rsa_alt_decrypt_func decrypt_func,
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| 156 | mbedtls_pk_rsa_alt_sign_func sign_func,
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| 157 | mbedtls_pk_rsa_alt_key_len_func key_len_func )
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| 158 | {
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| 159 | mbedtls_rsa_alt_context *rsa_alt;
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| 160 | const mbedtls_pk_info_t *info = &mbedtls_rsa_alt_info;
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| 161 |
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| 162 | PK_VALIDATE_RET( ctx != NULL );
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| 163 | if( ctx->pk_info != NULL )
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| 164 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 165 |
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| 166 | if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
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| 167 | return( MBEDTLS_ERR_PK_ALLOC_FAILED );
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| 168 |
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| 169 | ctx->pk_info = info;
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| 170 |
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| 171 | rsa_alt = (mbedtls_rsa_alt_context *) ctx->pk_ctx;
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| 172 |
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| 173 | rsa_alt->key = key;
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| 174 | rsa_alt->decrypt_func = decrypt_func;
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| 175 | rsa_alt->sign_func = sign_func;
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| 176 | rsa_alt->key_len_func = key_len_func;
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| 177 |
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| 178 | return( 0 );
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| 179 | }
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| 180 | #endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
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| 181 |
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| 182 | /*
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| 183 | * Tell if a PK can do the operations of the given type
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| 184 | */
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| 185 | int mbedtls_pk_can_do( const mbedtls_pk_context *ctx, mbedtls_pk_type_t type )
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| 186 | {
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| 187 | /* A context with null pk_info is not set up yet and can't do anything.
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| 188 | * For backward compatibility, also accept NULL instead of a context
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| 189 | * pointer. */
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| 190 | if( ctx == NULL || ctx->pk_info == NULL )
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| 191 | return( 0 );
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| 192 |
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| 193 | return( ctx->pk_info->can_do( type ) );
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| 194 | }
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| 195 |
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| 196 | /*
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| 197 | * Helper for mbedtls_pk_sign and mbedtls_pk_verify
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| 198 | */
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| 199 | static inline int pk_hashlen_helper( mbedtls_md_type_t md_alg, size_t *hash_len )
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| 200 | {
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| 201 | const mbedtls_md_info_t *md_info;
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| 202 |
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| 203 | if( *hash_len != 0 )
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| 204 | return( 0 );
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| 205 |
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| 206 | if( ( md_info = mbedtls_md_info_from_type( md_alg ) ) == NULL )
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| 207 | return( -1 );
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| 208 |
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| 209 | *hash_len = mbedtls_md_get_size( md_info );
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| 210 | return( 0 );
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| 211 | }
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| 212 |
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| 213 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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| 214 | /*
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| 215 | * Helper to set up a restart context if needed
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| 216 | */
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| 217 | static int pk_restart_setup( mbedtls_pk_restart_ctx *ctx,
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| 218 | const mbedtls_pk_info_t *info )
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| 219 | {
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| 220 | /* Don't do anything if already set up or invalid */
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| 221 | if( ctx == NULL || ctx->pk_info != NULL )
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| 222 | return( 0 );
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| 223 |
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| 224 | /* Should never happen when we're called */
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| 225 | if( info->rs_alloc_func == NULL || info->rs_free_func == NULL )
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| 226 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 227 |
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| 228 | if( ( ctx->rs_ctx = info->rs_alloc_func() ) == NULL )
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| 229 | return( MBEDTLS_ERR_PK_ALLOC_FAILED );
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| 230 |
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| 231 | ctx->pk_info = info;
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| 232 |
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| 233 | return( 0 );
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| 234 | }
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| 235 | #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
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| 236 |
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| 237 | /*
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| 238 | * Verify a signature (restartable)
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| 239 | */
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| 240 | int mbedtls_pk_verify_restartable( mbedtls_pk_context *ctx,
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| 241 | mbedtls_md_type_t md_alg,
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| 242 | const unsigned char *hash, size_t hash_len,
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| 243 | const unsigned char *sig, size_t sig_len,
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| 244 | mbedtls_pk_restart_ctx *rs_ctx )
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| 245 | {
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| 246 | PK_VALIDATE_RET( ctx != NULL );
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| 247 | PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) ||
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| 248 | hash != NULL );
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| 249 | PK_VALIDATE_RET( sig != NULL );
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| 250 |
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| 251 | if( ctx->pk_info == NULL ||
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| 252 | pk_hashlen_helper( md_alg, &hash_len ) != 0 )
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| 253 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 254 |
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| 255 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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| 256 | /* optimization: use non-restartable version if restart disabled */
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| 257 | if( rs_ctx != NULL &&
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| 258 | mbedtls_ecp_restart_is_enabled() &&
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| 259 | ctx->pk_info->verify_rs_func != NULL )
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| 260 | {
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| 261 | int ret;
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| 262 |
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| 263 | if( ( ret = pk_restart_setup( rs_ctx, ctx->pk_info ) ) != 0 )
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| 264 | return( ret );
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| 265 |
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| 266 | ret = ctx->pk_info->verify_rs_func( ctx->pk_ctx,
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| 267 | md_alg, hash, hash_len, sig, sig_len, rs_ctx->rs_ctx );
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| 268 |
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| 269 | if( ret != MBEDTLS_ERR_ECP_IN_PROGRESS )
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| 270 | mbedtls_pk_restart_free( rs_ctx );
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| 271 |
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| 272 | return( ret );
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| 273 | }
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| 274 | #else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
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| 275 | (void) rs_ctx;
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| 276 | #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
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| 277 |
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| 278 | if( ctx->pk_info->verify_func == NULL )
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| 279 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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| 280 |
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| 281 | return( ctx->pk_info->verify_func( ctx->pk_ctx, md_alg, hash, hash_len,
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| 282 | sig, sig_len ) );
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| 283 | }
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| 284 |
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| 285 | /*
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| 286 | * Verify a signature
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| 287 | */
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| 288 | int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
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| 289 | const unsigned char *hash, size_t hash_len,
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| 290 | const unsigned char *sig, size_t sig_len )
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| 291 | {
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| 292 | return( mbedtls_pk_verify_restartable( ctx, md_alg, hash, hash_len,
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| 293 | sig, sig_len, NULL ) );
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| 294 | }
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| 295 |
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| 296 | /*
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| 297 | * Verify a signature with options
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| 298 | */
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| 299 | int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
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| 300 | mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
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| 301 | const unsigned char *hash, size_t hash_len,
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| 302 | const unsigned char *sig, size_t sig_len )
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| 303 | {
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| 304 | PK_VALIDATE_RET( ctx != NULL );
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| 305 | PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) ||
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| 306 | hash != NULL );
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| 307 | PK_VALIDATE_RET( sig != NULL );
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| 308 |
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| 309 | if( ctx->pk_info == NULL )
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| 310 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 311 |
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| 312 | if( ! mbedtls_pk_can_do( ctx, type ) )
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| 313 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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| 314 |
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| 315 | if( type == MBEDTLS_PK_RSASSA_PSS )
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| 316 | {
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| 317 | #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21)
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| 318 | int ret;
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| 319 | const mbedtls_pk_rsassa_pss_options *pss_opts;
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| 320 |
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| 321 | #if SIZE_MAX > UINT_MAX
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| 322 | if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
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| 323 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 324 | #endif /* SIZE_MAX > UINT_MAX */
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| 325 |
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| 326 | if( options == NULL )
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| 327 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 328 |
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| 329 | pss_opts = (const mbedtls_pk_rsassa_pss_options *) options;
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| 330 |
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| 331 | if( sig_len < mbedtls_pk_get_len( ctx ) )
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| 332 | return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
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| 333 |
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| 334 | ret = mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_pk_rsa( *ctx ),
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| 335 | NULL, NULL, MBEDTLS_RSA_PUBLIC,
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| 336 | md_alg, (unsigned int) hash_len, hash,
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| 337 | pss_opts->mgf1_hash_id,
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| 338 | pss_opts->expected_salt_len,
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| 339 | sig );
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| 340 | if( ret != 0 )
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| 341 | return( ret );
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| 342 |
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| 343 | if( sig_len > mbedtls_pk_get_len( ctx ) )
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| 344 | return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
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| 345 |
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| 346 | return( 0 );
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| 347 | #else
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| 348 | return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
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| 349 | #endif /* MBEDTLS_RSA_C && MBEDTLS_PKCS1_V21 */
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| 350 | }
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| 351 |
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| 352 | /* General case: no options */
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| 353 | if( options != NULL )
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| 354 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 355 |
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| 356 | return( mbedtls_pk_verify( ctx, md_alg, hash, hash_len, sig, sig_len ) );
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| 357 | }
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| 358 |
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| 359 | /*
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| 360 | * Make a signature (restartable)
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| 361 | */
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| 362 | int mbedtls_pk_sign_restartable( mbedtls_pk_context *ctx,
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| 363 | mbedtls_md_type_t md_alg,
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| 364 | const unsigned char *hash, size_t hash_len,
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| 365 | unsigned char *sig, size_t *sig_len,
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| 366 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
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| 367 | mbedtls_pk_restart_ctx *rs_ctx )
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| 368 | {
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| 369 | PK_VALIDATE_RET( ctx != NULL );
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| 370 | PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) ||
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| 371 | hash != NULL );
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| 372 | PK_VALIDATE_RET( sig != NULL );
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| 373 |
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| 374 | if( ctx->pk_info == NULL ||
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| 375 | pk_hashlen_helper( md_alg, &hash_len ) != 0 )
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| 376 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 377 |
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| 378 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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| 379 | /* optimization: use non-restartable version if restart disabled */
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| 380 | if( rs_ctx != NULL &&
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| 381 | mbedtls_ecp_restart_is_enabled() &&
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| 382 | ctx->pk_info->sign_rs_func != NULL )
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| 383 | {
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| 384 | int ret;
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| 385 |
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| 386 | if( ( ret = pk_restart_setup( rs_ctx, ctx->pk_info ) ) != 0 )
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| 387 | return( ret );
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| 388 |
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| 389 | ret = ctx->pk_info->sign_rs_func( ctx->pk_ctx, md_alg,
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| 390 | hash, hash_len, sig, sig_len, f_rng, p_rng, rs_ctx->rs_ctx );
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| 391 |
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| 392 | if( ret != MBEDTLS_ERR_ECP_IN_PROGRESS )
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| 393 | mbedtls_pk_restart_free( rs_ctx );
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| 394 |
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| 395 | return( ret );
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| 396 | }
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| 397 | #else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
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| 398 | (void) rs_ctx;
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| 399 | #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
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| 400 |
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| 401 | if( ctx->pk_info->sign_func == NULL )
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| 402 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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| 403 |
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| 404 | return( ctx->pk_info->sign_func( ctx->pk_ctx, md_alg, hash, hash_len,
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| 405 | sig, sig_len, f_rng, p_rng ) );
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| 406 | }
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| 407 |
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| 408 | /*
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| 409 | * Make a signature
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| 410 | */
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| 411 | int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
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| 412 | const unsigned char *hash, size_t hash_len,
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| 413 | unsigned char *sig, size_t *sig_len,
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| 414 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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| 415 | {
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| 416 | return( mbedtls_pk_sign_restartable( ctx, md_alg, hash, hash_len,
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| 417 | sig, sig_len, f_rng, p_rng, NULL ) );
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| 418 | }
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| 419 |
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| 420 | /*
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| 421 | * Decrypt message
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| 422 | */
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| 423 | int mbedtls_pk_decrypt( mbedtls_pk_context *ctx,
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| 424 | const unsigned char *input, size_t ilen,
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| 425 | unsigned char *output, size_t *olen, size_t osize,
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| 426 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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| 427 | {
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| 428 | PK_VALIDATE_RET( ctx != NULL );
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| 429 | PK_VALIDATE_RET( input != NULL || ilen == 0 );
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| 430 | PK_VALIDATE_RET( output != NULL || osize == 0 );
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| 431 | PK_VALIDATE_RET( olen != NULL );
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| 432 |
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| 433 | if( ctx->pk_info == NULL )
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| 434 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 435 |
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| 436 | if( ctx->pk_info->decrypt_func == NULL )
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| 437 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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| 438 |
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| 439 | return( ctx->pk_info->decrypt_func( ctx->pk_ctx, input, ilen,
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| 440 | output, olen, osize, f_rng, p_rng ) );
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| 441 | }
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| 442 |
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| 443 | /*
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| 444 | * Encrypt message
|
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| 445 | */
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| 446 | int mbedtls_pk_encrypt( mbedtls_pk_context *ctx,
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| 447 | const unsigned char *input, size_t ilen,
|
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| 448 | unsigned char *output, size_t *olen, size_t osize,
|
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| 449 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
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| 450 | {
|
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| 451 | PK_VALIDATE_RET( ctx != NULL );
|
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| 452 | PK_VALIDATE_RET( input != NULL || ilen == 0 );
|
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| 453 | PK_VALIDATE_RET( output != NULL || osize == 0 );
|
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| 454 | PK_VALIDATE_RET( olen != NULL );
|
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| 455 |
|
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| 456 | if( ctx->pk_info == NULL )
|
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| 457 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
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| 458 |
|
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| 459 | if( ctx->pk_info->encrypt_func == NULL )
|
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| 460 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
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| 461 |
|
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| 462 | return( ctx->pk_info->encrypt_func( ctx->pk_ctx, input, ilen,
|
---|
| 463 | output, olen, osize, f_rng, p_rng ) );
|
---|
| 464 | }
|
---|
| 465 |
|
---|
| 466 | /*
|
---|
| 467 | * Check public-private key pair
|
---|
| 468 | */
|
---|
| 469 | int mbedtls_pk_check_pair( const mbedtls_pk_context *pub, const mbedtls_pk_context *prv )
|
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| 470 | {
|
---|
| 471 | PK_VALIDATE_RET( pub != NULL );
|
---|
| 472 | PK_VALIDATE_RET( prv != NULL );
|
---|
| 473 |
|
---|
| 474 | if( pub->pk_info == NULL ||
|
---|
| 475 | prv->pk_info == NULL ||
|
---|
| 476 | prv->pk_info->check_pair_func == NULL )
|
---|
| 477 | {
|
---|
| 478 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
---|
| 479 | }
|
---|
| 480 |
|
---|
| 481 | if( prv->pk_info->type == MBEDTLS_PK_RSA_ALT )
|
---|
| 482 | {
|
---|
| 483 | if( pub->pk_info->type != MBEDTLS_PK_RSA )
|
---|
| 484 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
---|
| 485 | }
|
---|
| 486 | else
|
---|
| 487 | {
|
---|
| 488 | if( pub->pk_info != prv->pk_info )
|
---|
| 489 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
---|
| 490 | }
|
---|
| 491 |
|
---|
| 492 | return( prv->pk_info->check_pair_func( pub->pk_ctx, prv->pk_ctx ) );
|
---|
| 493 | }
|
---|
| 494 |
|
---|
| 495 | /*
|
---|
| 496 | * Get key size in bits
|
---|
| 497 | */
|
---|
| 498 | size_t mbedtls_pk_get_bitlen( const mbedtls_pk_context *ctx )
|
---|
| 499 | {
|
---|
| 500 | /* For backward compatibility, accept NULL or a context that
|
---|
| 501 | * isn't set up yet, and return a fake value that should be safe. */
|
---|
| 502 | if( ctx == NULL || ctx->pk_info == NULL )
|
---|
| 503 | return( 0 );
|
---|
| 504 |
|
---|
| 505 | return( ctx->pk_info->get_bitlen( ctx->pk_ctx ) );
|
---|
| 506 | }
|
---|
| 507 |
|
---|
| 508 | /*
|
---|
| 509 | * Export debug information
|
---|
| 510 | */
|
---|
| 511 | int mbedtls_pk_debug( const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items )
|
---|
| 512 | {
|
---|
| 513 | PK_VALIDATE_RET( ctx != NULL );
|
---|
| 514 | if( ctx->pk_info == NULL )
|
---|
| 515 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
---|
| 516 |
|
---|
| 517 | if( ctx->pk_info->debug_func == NULL )
|
---|
| 518 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
---|
| 519 |
|
---|
| 520 | ctx->pk_info->debug_func( ctx->pk_ctx, items );
|
---|
| 521 | return( 0 );
|
---|
| 522 | }
|
---|
| 523 |
|
---|
| 524 | /*
|
---|
| 525 | * Access the PK type name
|
---|
| 526 | */
|
---|
| 527 | const char *mbedtls_pk_get_name( const mbedtls_pk_context *ctx )
|
---|
| 528 | {
|
---|
| 529 | if( ctx == NULL || ctx->pk_info == NULL )
|
---|
| 530 | return( "invalid PK" );
|
---|
| 531 |
|
---|
| 532 | return( ctx->pk_info->name );
|
---|
| 533 | }
|
---|
| 534 |
|
---|
| 535 | /*
|
---|
| 536 | * Access the PK type
|
---|
| 537 | */
|
---|
| 538 | mbedtls_pk_type_t mbedtls_pk_get_type( const mbedtls_pk_context *ctx )
|
---|
| 539 | {
|
---|
| 540 | if( ctx == NULL || ctx->pk_info == NULL )
|
---|
| 541 | return( MBEDTLS_PK_NONE );
|
---|
| 542 |
|
---|
| 543 | return( ctx->pk_info->type );
|
---|
| 544 | }
|
---|
| 545 |
|
---|
| 546 | #endif /* MBEDTLS_PK_C */
|
---|