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-rw-r--r--lib/mbedtls-2.27.0/library/ccm.c547
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diff --git a/lib/mbedtls-2.27.0/library/ccm.c b/lib/mbedtls-2.27.0/library/ccm.c
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--- a/lib/mbedtls-2.27.0/library/ccm.c
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-/*
- * NIST SP800-38C compliant CCM implementation
- *
- * Copyright The Mbed TLS Contributors
- * SPDX-License-Identifier: Apache-2.0
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * Definition of CCM:
- * http://csrc.nist.gov/publications/nistpubs/800-38C/SP800-38C_updated-July20_2007.pdf
- * RFC 3610 "Counter with CBC-MAC (CCM)"
- *
- * Related:
- * RFC 5116 "An Interface and Algorithms for Authenticated Encryption"
- */
-
-#include "common.h"
-
-#if defined(MBEDTLS_CCM_C)
-
-#include "mbedtls/ccm.h"
-#include "mbedtls/platform_util.h"
-#include "mbedtls/error.h"
-
-#include <string.h>
-
-#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
-#if defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
-#else
-#include <stdio.h>
-#define mbedtls_printf printf
-#endif /* MBEDTLS_PLATFORM_C */
-#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
-
-#if !defined(MBEDTLS_CCM_ALT)
-
-#define CCM_VALIDATE_RET( cond ) \
- MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_CCM_BAD_INPUT )
-#define CCM_VALIDATE( cond ) \
- MBEDTLS_INTERNAL_VALIDATE( cond )
-
-#define CCM_ENCRYPT 0
-#define CCM_DECRYPT 1
-
-/*
- * Initialize context
- */
-void mbedtls_ccm_init( mbedtls_ccm_context *ctx )
-{
- CCM_VALIDATE( ctx != NULL );
- memset( ctx, 0, sizeof( mbedtls_ccm_context ) );
-}
-
-int mbedtls_ccm_setkey( mbedtls_ccm_context *ctx,
- mbedtls_cipher_id_t cipher,
- const unsigned char *key,
- unsigned int keybits )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- const mbedtls_cipher_info_t *cipher_info;
-
- CCM_VALIDATE_RET( ctx != NULL );
- CCM_VALIDATE_RET( key != NULL );
-
- cipher_info = mbedtls_cipher_info_from_values( cipher, keybits,
- MBEDTLS_MODE_ECB );
- if( cipher_info == NULL )
- return( MBEDTLS_ERR_CCM_BAD_INPUT );
-
- if( cipher_info->block_size != 16 )
- return( MBEDTLS_ERR_CCM_BAD_INPUT );
-
- mbedtls_cipher_free( &ctx->cipher_ctx );
-
- if( ( ret = mbedtls_cipher_setup( &ctx->cipher_ctx, cipher_info ) ) != 0 )
- return( ret );
-
- if( ( ret = mbedtls_cipher_setkey( &ctx->cipher_ctx, key, keybits,
- MBEDTLS_ENCRYPT ) ) != 0 )
- {
- return( ret );
- }
-
- return( 0 );
-}
-
-/*
- * Free context
- */
-void mbedtls_ccm_free( mbedtls_ccm_context *ctx )
-{
- if( ctx == NULL )
- return;
- mbedtls_cipher_free( &ctx->cipher_ctx );
- mbedtls_platform_zeroize( ctx, sizeof( mbedtls_ccm_context ) );
-}
-
-/*
- * Macros for common operations.
- * Results in smaller compiled code than static inline functions.
- */
-
-/*
- * Update the CBC-MAC state in y using a block in b
- * (Always using b as the source helps the compiler optimise a bit better.)
- */
-#define UPDATE_CBC_MAC \
- for( i = 0; i < 16; i++ ) \
- y[i] ^= b[i]; \
- \
- if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, y, 16, y, &olen ) ) != 0 ) \
- return( ret );
-
-/*
- * Encrypt or decrypt a partial block with CTR
- * Warning: using b for temporary storage! src and dst must not be b!
- * This avoids allocating one more 16 bytes buffer while allowing src == dst.
- */
-#define CTR_CRYPT( dst, src, len ) \
- do \
- { \
- if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctr, \
- 16, b, &olen ) ) != 0 ) \
- { \
- return( ret ); \
- } \
- \
- for( i = 0; i < (len); i++ ) \
- (dst)[i] = (src)[i] ^ b[i]; \
- } while( 0 )
-
-/*
- * Authenticated encryption or decryption
- */
-static int ccm_auth_crypt( mbedtls_ccm_context *ctx, int mode, size_t length,
- const unsigned char *iv, size_t iv_len,
- const unsigned char *add, size_t add_len,
- const unsigned char *input, unsigned char *output,
- unsigned char *tag, size_t tag_len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char i;
- unsigned char q;
- size_t len_left, olen;
- unsigned char b[16];
- unsigned char y[16];
- unsigned char ctr[16];
- const unsigned char *src;
- unsigned char *dst;
-
- /*
- * Check length requirements: SP800-38C A.1
- * Additional requirement: a < 2^16 - 2^8 to simplify the code.
- * 'length' checked later (when writing it to the first block)
- *
- * Also, loosen the requirements to enable support for CCM* (IEEE 802.15.4).
- */
- if( tag_len == 2 || tag_len > 16 || tag_len % 2 != 0 )
- return( MBEDTLS_ERR_CCM_BAD_INPUT );
-
- /* Also implies q is within bounds */
- if( iv_len < 7 || iv_len > 13 )
- return( MBEDTLS_ERR_CCM_BAD_INPUT );
-
- if( add_len >= 0xFF00 )
- return( MBEDTLS_ERR_CCM_BAD_INPUT );
-
- q = 16 - 1 - (unsigned char) iv_len;
-
- /*
- * First block B_0:
- * 0 .. 0 flags
- * 1 .. iv_len nonce (aka iv)
- * iv_len+1 .. 15 length
- *
- * With flags as (bits):
- * 7 0
- * 6 add present?
- * 5 .. 3 (t - 2) / 2
- * 2 .. 0 q - 1
- */
- b[0] = 0;
- b[0] |= ( add_len > 0 ) << 6;
- b[0] |= ( ( tag_len - 2 ) / 2 ) << 3;
- b[0] |= q - 1;
-
- memcpy( b + 1, iv, iv_len );
-
- for( i = 0, len_left = length; i < q; i++, len_left >>= 8 )
- b[15-i] = (unsigned char)( len_left & 0xFF );
-
- if( len_left > 0 )
- return( MBEDTLS_ERR_CCM_BAD_INPUT );
-
-
- /* Start CBC-MAC with first block */
- memset( y, 0, 16 );
- UPDATE_CBC_MAC;
-
- /*
- * If there is additional data, update CBC-MAC with
- * add_len, add, 0 (padding to a block boundary)
- */
- if( add_len > 0 )
- {
- size_t use_len;
- len_left = add_len;
- src = add;
-
- memset( b, 0, 16 );
- b[0] = (unsigned char)( ( add_len >> 8 ) & 0xFF );
- b[1] = (unsigned char)( ( add_len ) & 0xFF );
-
- use_len = len_left < 16 - 2 ? len_left : 16 - 2;
- memcpy( b + 2, src, use_len );
- len_left -= use_len;
- src += use_len;
-
- UPDATE_CBC_MAC;
-
- while( len_left > 0 )
- {
- use_len = len_left > 16 ? 16 : len_left;
-
- memset( b, 0, 16 );
- memcpy( b, src, use_len );
- UPDATE_CBC_MAC;
-
- len_left -= use_len;
- src += use_len;
- }
- }
-
- /*
- * Prepare counter block for encryption:
- * 0 .. 0 flags
- * 1 .. iv_len nonce (aka iv)
- * iv_len+1 .. 15 counter (initially 1)
- *
- * With flags as (bits):
- * 7 .. 3 0
- * 2 .. 0 q - 1
- */
- ctr[0] = q - 1;
- memcpy( ctr + 1, iv, iv_len );
- memset( ctr + 1 + iv_len, 0, q );
- ctr[15] = 1;
-
- /*
- * Authenticate and {en,de}crypt the message.
- *
- * The only difference between encryption and decryption is
- * the respective order of authentication and {en,de}cryption.
- */
- len_left = length;
- src = input;
- dst = output;
-
- while( len_left > 0 )
- {
- size_t use_len = len_left > 16 ? 16 : len_left;
-
- if( mode == CCM_ENCRYPT )
- {
- memset( b, 0, 16 );
- memcpy( b, src, use_len );
- UPDATE_CBC_MAC;
- }
-
- CTR_CRYPT( dst, src, use_len );
-
- if( mode == CCM_DECRYPT )
- {
- memset( b, 0, 16 );
- memcpy( b, dst, use_len );
- UPDATE_CBC_MAC;
- }
-
- dst += use_len;
- src += use_len;
- len_left -= use_len;
-
- /*
- * Increment counter.
- * No need to check for overflow thanks to the length check above.
- */
- for( i = 0; i < q; i++ )
- if( ++ctr[15-i] != 0 )
- break;
- }
-
- /*
- * Authentication: reset counter and crypt/mask internal tag
- */
- for( i = 0; i < q; i++ )
- ctr[15-i] = 0;
-
- CTR_CRYPT( y, y, 16 );
- memcpy( tag, y, tag_len );
-
- return( 0 );
-}
-
-/*
- * Authenticated encryption
- */
-int mbedtls_ccm_star_encrypt_and_tag( mbedtls_ccm_context *ctx, size_t length,
- const unsigned char *iv, size_t iv_len,
- const unsigned char *add, size_t add_len,
- const unsigned char *input, unsigned char *output,
- unsigned char *tag, size_t tag_len )
-{
- CCM_VALIDATE_RET( ctx != NULL );
- CCM_VALIDATE_RET( iv != NULL );
- CCM_VALIDATE_RET( add_len == 0 || add != NULL );
- CCM_VALIDATE_RET( length == 0 || input != NULL );
- CCM_VALIDATE_RET( length == 0 || output != NULL );
- CCM_VALIDATE_RET( tag_len == 0 || tag != NULL );
- return( ccm_auth_crypt( ctx, CCM_ENCRYPT, length, iv, iv_len,
- add, add_len, input, output, tag, tag_len ) );
-}
-
-int mbedtls_ccm_encrypt_and_tag( mbedtls_ccm_context *ctx, size_t length,
- const unsigned char *iv, size_t iv_len,
- const unsigned char *add, size_t add_len,
- const unsigned char *input, unsigned char *output,
- unsigned char *tag, size_t tag_len )
-{
- CCM_VALIDATE_RET( ctx != NULL );
- CCM_VALIDATE_RET( iv != NULL );
- CCM_VALIDATE_RET( add_len == 0 || add != NULL );
- CCM_VALIDATE_RET( length == 0 || input != NULL );
- CCM_VALIDATE_RET( length == 0 || output != NULL );
- CCM_VALIDATE_RET( tag_len == 0 || tag != NULL );
- if( tag_len == 0 )
- return( MBEDTLS_ERR_CCM_BAD_INPUT );
-
- return( mbedtls_ccm_star_encrypt_and_tag( ctx, length, iv, iv_len, add,
- add_len, input, output, tag, tag_len ) );
-}
-
-/*
- * Authenticated decryption
- */
-int mbedtls_ccm_star_auth_decrypt( mbedtls_ccm_context *ctx, size_t length,
- const unsigned char *iv, size_t iv_len,
- const unsigned char *add, size_t add_len,
- const unsigned char *input, unsigned char *output,
- const unsigned char *tag, size_t tag_len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char check_tag[16];
- unsigned char i;
- int diff;
-
- CCM_VALIDATE_RET( ctx != NULL );
- CCM_VALIDATE_RET( iv != NULL );
- CCM_VALIDATE_RET( add_len == 0 || add != NULL );
- CCM_VALIDATE_RET( length == 0 || input != NULL );
- CCM_VALIDATE_RET( length == 0 || output != NULL );
- CCM_VALIDATE_RET( tag_len == 0 || tag != NULL );
-
- if( ( ret = ccm_auth_crypt( ctx, CCM_DECRYPT, length,
- iv, iv_len, add, add_len,
- input, output, check_tag, tag_len ) ) != 0 )
- {
- return( ret );
- }
-
- /* Check tag in "constant-time" */
- for( diff = 0, i = 0; i < tag_len; i++ )
- diff |= tag[i] ^ check_tag[i];
-
- if( diff != 0 )
- {
- mbedtls_platform_zeroize( output, length );
- return( MBEDTLS_ERR_CCM_AUTH_FAILED );
- }
-
- return( 0 );
-}
-
-int mbedtls_ccm_auth_decrypt( mbedtls_ccm_context *ctx, size_t length,
- const unsigned char *iv, size_t iv_len,
- const unsigned char *add, size_t add_len,
- const unsigned char *input, unsigned char *output,
- const unsigned char *tag, size_t tag_len )
-{
- CCM_VALIDATE_RET( ctx != NULL );
- CCM_VALIDATE_RET( iv != NULL );
- CCM_VALIDATE_RET( add_len == 0 || add != NULL );
- CCM_VALIDATE_RET( length == 0 || input != NULL );
- CCM_VALIDATE_RET( length == 0 || output != NULL );
- CCM_VALIDATE_RET( tag_len == 0 || tag != NULL );
-
- if( tag_len == 0 )
- return( MBEDTLS_ERR_CCM_BAD_INPUT );
-
- return( mbedtls_ccm_star_auth_decrypt( ctx, length, iv, iv_len, add,
- add_len, input, output, tag, tag_len ) );
-}
-#endif /* !MBEDTLS_CCM_ALT */
-
-#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
-/*
- * Examples 1 to 3 from SP800-38C Appendix C
- */
-
-#define NB_TESTS 3
-#define CCM_SELFTEST_PT_MAX_LEN 24
-#define CCM_SELFTEST_CT_MAX_LEN 32
-/*
- * The data is the same for all tests, only the used length changes
- */
-static const unsigned char key_test_data[] = {
- 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
- 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f
-};
-
-static const unsigned char iv_test_data[] = {
- 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
- 0x18, 0x19, 0x1a, 0x1b
-};
-
-static const unsigned char ad_test_data[] = {
- 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
- 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
- 0x10, 0x11, 0x12, 0x13
-};
-
-static const unsigned char msg_test_data[CCM_SELFTEST_PT_MAX_LEN] = {
- 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
- 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
-};
-
-static const size_t iv_len_test_data [NB_TESTS] = { 7, 8, 12 };
-static const size_t add_len_test_data[NB_TESTS] = { 8, 16, 20 };
-static const size_t msg_len_test_data[NB_TESTS] = { 4, 16, 24 };
-static const size_t tag_len_test_data[NB_TESTS] = { 4, 6, 8 };
-
-static const unsigned char res_test_data[NB_TESTS][CCM_SELFTEST_CT_MAX_LEN] = {
- { 0x71, 0x62, 0x01, 0x5b, 0x4d, 0xac, 0x25, 0x5d },
- { 0xd2, 0xa1, 0xf0, 0xe0, 0x51, 0xea, 0x5f, 0x62,
- 0x08, 0x1a, 0x77, 0x92, 0x07, 0x3d, 0x59, 0x3d,
- 0x1f, 0xc6, 0x4f, 0xbf, 0xac, 0xcd },
- { 0xe3, 0xb2, 0x01, 0xa9, 0xf5, 0xb7, 0x1a, 0x7a,
- 0x9b, 0x1c, 0xea, 0xec, 0xcd, 0x97, 0xe7, 0x0b,
- 0x61, 0x76, 0xaa, 0xd9, 0xa4, 0x42, 0x8a, 0xa5,
- 0x48, 0x43, 0x92, 0xfb, 0xc1, 0xb0, 0x99, 0x51 }
-};
-
-int mbedtls_ccm_self_test( int verbose )
-{
- mbedtls_ccm_context ctx;
- /*
- * Some hardware accelerators require the input and output buffers
- * would be in RAM, because the flash is not accessible.
- * Use buffers on the stack to hold the test vectors data.
- */
- unsigned char plaintext[CCM_SELFTEST_PT_MAX_LEN];
- unsigned char ciphertext[CCM_SELFTEST_CT_MAX_LEN];
- size_t i;
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- mbedtls_ccm_init( &ctx );
-
- if( mbedtls_ccm_setkey( &ctx, MBEDTLS_CIPHER_ID_AES, key_test_data,
- 8 * sizeof key_test_data ) != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( " CCM: setup failed" );
-
- return( 1 );
- }
-
- for( i = 0; i < NB_TESTS; i++ )
- {
- if( verbose != 0 )
- mbedtls_printf( " CCM-AES #%u: ", (unsigned int) i + 1 );
-
- memset( plaintext, 0, CCM_SELFTEST_PT_MAX_LEN );
- memset( ciphertext, 0, CCM_SELFTEST_CT_MAX_LEN );
- memcpy( plaintext, msg_test_data, msg_len_test_data[i] );
-
- ret = mbedtls_ccm_encrypt_and_tag( &ctx, msg_len_test_data[i],
- iv_test_data, iv_len_test_data[i],
- ad_test_data, add_len_test_data[i],
- plaintext, ciphertext,
- ciphertext + msg_len_test_data[i],
- tag_len_test_data[i] );
-
- if( ret != 0 ||
- memcmp( ciphertext, res_test_data[i],
- msg_len_test_data[i] + tag_len_test_data[i] ) != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( "failed\n" );
-
- return( 1 );
- }
- memset( plaintext, 0, CCM_SELFTEST_PT_MAX_LEN );
-
- ret = mbedtls_ccm_auth_decrypt( &ctx, msg_len_test_data[i],
- iv_test_data, iv_len_test_data[i],
- ad_test_data, add_len_test_data[i],
- ciphertext, plaintext,
- ciphertext + msg_len_test_data[i],
- tag_len_test_data[i] );
-
- if( ret != 0 ||
- memcmp( plaintext, msg_test_data, msg_len_test_data[i] ) != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( "failed\n" );
-
- return( 1 );
- }
-
- if( verbose != 0 )
- mbedtls_printf( "passed\n" );
- }
-
- mbedtls_ccm_free( &ctx );
-
- if( verbose != 0 )
- mbedtls_printf( "\n" );
-
- return( 0 );
-}
-
-#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
-
-#endif /* MBEDTLS_CCM_C */
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