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-rw-r--r--library/nist_kw.c691
1 files changed, 355 insertions, 336 deletions
diff --git a/library/nist_kw.c b/library/nist_kw.c
index 495c23d06..f15425b8b 100644
--- a/library/nist_kw.c
+++ b/library/nist_kw.c
@@ -3,19 +3,7 @@
* only
*
* 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.
+ * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
/*
* Definition of Key Wrapping:
@@ -35,6 +23,7 @@
#include "mbedtls/platform_util.h"
#include "mbedtls/error.h"
#include "mbedtls/constant_time.h"
+#include "constant_time_internal.h"
#include <stdint.h>
#include <string.h>
@@ -47,35 +36,37 @@
#define MIN_SEMIBLOCKS_COUNT 3
/*! The 64-bit default integrity check value (ICV) for KW mode. */
-static const unsigned char NIST_KW_ICV1[] = {0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6};
+static const unsigned char NIST_KW_ICV1[] = { 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6 };
/*! The 32-bit default integrity check value (ICV) for KWP mode. */
-static const unsigned char NIST_KW_ICV2[] = {0xA6, 0x59, 0x59, 0xA6};
+static const unsigned char NIST_KW_ICV2[] = { 0xA6, 0x59, 0x59, 0xA6 };
/*
* Initialize context
*/
-void mbedtls_nist_kw_init( mbedtls_nist_kw_context *ctx )
+void mbedtls_nist_kw_init(mbedtls_nist_kw_context *ctx)
{
- memset( ctx, 0, sizeof( mbedtls_nist_kw_context ) );
+ memset(ctx, 0, sizeof(mbedtls_nist_kw_context));
}
-int mbedtls_nist_kw_setkey( mbedtls_nist_kw_context *ctx,
- mbedtls_cipher_id_t cipher,
- const unsigned char *key,
- unsigned int keybits,
- const int is_wrap )
+int mbedtls_nist_kw_setkey(mbedtls_nist_kw_context *ctx,
+ mbedtls_cipher_id_t cipher,
+ const unsigned char *key,
+ unsigned int keybits,
+ const int is_wrap)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
const mbedtls_cipher_info_t *cipher_info;
- cipher_info = mbedtls_cipher_info_from_values( cipher,
- keybits,
- MBEDTLS_MODE_ECB );
- if( cipher_info == NULL )
- return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+ cipher_info = mbedtls_cipher_info_from_values(cipher,
+ keybits,
+ MBEDTLS_MODE_ECB);
+ if (cipher_info == NULL) {
+ return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+ }
- if( cipher_info->block_size != 16 )
- return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+ if (mbedtls_cipher_info_get_block_size(cipher_info) != 16) {
+ return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
+ }
/*
* SP 800-38F currently defines AES cipher as the only block cipher allowed:
@@ -86,44 +77,44 @@ int mbedtls_nist_kw_setkey( mbedtls_nist_kw_context *ctx,
* Currently we don't support other 128 bit block ciphers for key wrapping,
* such as Camellia and Aria.
*/
- if( cipher != MBEDTLS_CIPHER_ID_AES )
- return( MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE );
+ if (cipher != MBEDTLS_CIPHER_ID_AES) {
+ return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
+ }
- mbedtls_cipher_free( &ctx->cipher_ctx );
+ mbedtls_cipher_free(&ctx->cipher_ctx);
- if( ( ret = mbedtls_cipher_setup( &ctx->cipher_ctx, cipher_info ) ) != 0 )
- return( ret );
+ if ((ret = mbedtls_cipher_setup(&ctx->cipher_ctx, cipher_info)) != 0) {
+ return ret;
+ }
- if( ( ret = mbedtls_cipher_setkey( &ctx->cipher_ctx, key, keybits,
- is_wrap ? MBEDTLS_ENCRYPT :
- MBEDTLS_DECRYPT )
- ) != 0 )
- {
- return( ret );
+ if ((ret = mbedtls_cipher_setkey(&ctx->cipher_ctx, key, keybits,
+ is_wrap ? MBEDTLS_ENCRYPT :
+ MBEDTLS_DECRYPT)
+ ) != 0) {
+ return ret;
}
- return( 0 );
+ return 0;
}
/*
* Free context
*/
-void mbedtls_nist_kw_free( mbedtls_nist_kw_context *ctx )
+void mbedtls_nist_kw_free(mbedtls_nist_kw_context *ctx)
{
- mbedtls_cipher_free( &ctx->cipher_ctx );
- mbedtls_platform_zeroize( ctx, sizeof( mbedtls_nist_kw_context ) );
+ mbedtls_cipher_free(&ctx->cipher_ctx);
+ mbedtls_platform_zeroize(ctx, sizeof(mbedtls_nist_kw_context));
}
/*
* Helper function for Xoring the uint64_t "t" with the encrypted A.
* Defined in NIST SP 800-38F section 6.1
*/
-static void calc_a_xor_t( unsigned char A[KW_SEMIBLOCK_LENGTH], uint64_t t )
+static void calc_a_xor_t(unsigned char A[KW_SEMIBLOCK_LENGTH], uint64_t t)
{
size_t i = 0;
- for( i = 0; i < sizeof( t ); i++ )
- {
- A[i] ^= ( t >> ( ( sizeof( t ) - 1 - i ) * 8 ) ) & 0xff;
+ for (i = 0; i < sizeof(t); i++) {
+ A[i] ^= (t >> ((sizeof(t) - 1 - i) * 8)) & 0xff;
}
}
@@ -131,10 +122,10 @@ static void calc_a_xor_t( unsigned char A[KW_SEMIBLOCK_LENGTH], uint64_t t )
* KW-AE as defined in SP 800-38F section 6.2
* KWP-AE as defined in SP 800-38F section 6.3
*/
-int mbedtls_nist_kw_wrap( mbedtls_nist_kw_context *ctx,
- mbedtls_nist_kw_mode_t mode,
- const unsigned char *input, size_t in_len,
- unsigned char *output, size_t *out_len, size_t out_size )
+int mbedtls_nist_kw_wrap(mbedtls_nist_kw_context *ctx,
+ mbedtls_nist_kw_mode_t mode,
+ const unsigned char *input, size_t in_len,
+ unsigned char *output, size_t *out_len, size_t out_size)
{
int ret = 0;
size_t semiblocks = 0;
@@ -148,106 +139,96 @@ int mbedtls_nist_kw_wrap( mbedtls_nist_kw_context *ctx,
/*
* Generate the String to work on
*/
- if( mode == MBEDTLS_KW_MODE_KW )
- {
- if( out_size < in_len + KW_SEMIBLOCK_LENGTH )
- {
- return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+ if (mode == MBEDTLS_KW_MODE_KW) {
+ if (out_size < in_len + KW_SEMIBLOCK_LENGTH) {
+ return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
}
/*
* According to SP 800-38F Table 1, the plaintext length for KW
* must be between 2 to 2^54-1 semiblocks inclusive.
*/
- if( in_len < 16 ||
+ if (in_len < 16 ||
#if SIZE_MAX > 0x1FFFFFFFFFFFFF8
in_len > 0x1FFFFFFFFFFFFF8 ||
#endif
- in_len % KW_SEMIBLOCK_LENGTH != 0 )
- {
- return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+ in_len % KW_SEMIBLOCK_LENGTH != 0) {
+ return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
}
- memcpy( output, NIST_KW_ICV1, KW_SEMIBLOCK_LENGTH );
- memmove( output + KW_SEMIBLOCK_LENGTH, input, in_len );
- }
- else
- {
- if( in_len % 8 != 0 )
- {
- padlen = ( 8 - ( in_len % 8 ) );
+ memcpy(output, NIST_KW_ICV1, KW_SEMIBLOCK_LENGTH);
+ memmove(output + KW_SEMIBLOCK_LENGTH, input, in_len);
+ } else {
+ if (in_len % 8 != 0) {
+ padlen = (8 - (in_len % 8));
}
- if( out_size < in_len + KW_SEMIBLOCK_LENGTH + padlen )
- {
- return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+ if (out_size < in_len + KW_SEMIBLOCK_LENGTH + padlen) {
+ return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
}
/*
* According to SP 800-38F Table 1, the plaintext length for KWP
* must be between 1 and 2^32-1 octets inclusive.
*/
- if( in_len < 1
+ if (in_len < 1
#if SIZE_MAX > 0xFFFFFFFF
|| in_len > 0xFFFFFFFF
#endif
- )
- {
- return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+ ) {
+ return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
}
- memcpy( output, NIST_KW_ICV2, KW_SEMIBLOCK_LENGTH / 2 );
- MBEDTLS_PUT_UINT32_BE( ( in_len & 0xffffffff ), output,
- KW_SEMIBLOCK_LENGTH / 2 );
+ memcpy(output, NIST_KW_ICV2, KW_SEMIBLOCK_LENGTH / 2);
+ MBEDTLS_PUT_UINT32_BE((in_len & 0xffffffff), output,
+ KW_SEMIBLOCK_LENGTH / 2);
- memcpy( output + KW_SEMIBLOCK_LENGTH, input, in_len );
- memset( output + KW_SEMIBLOCK_LENGTH + in_len, 0, padlen );
+ memcpy(output + KW_SEMIBLOCK_LENGTH, input, in_len);
+ memset(output + KW_SEMIBLOCK_LENGTH + in_len, 0, padlen);
}
- semiblocks = ( ( in_len + padlen ) / KW_SEMIBLOCK_LENGTH ) + 1;
+ semiblocks = ((in_len + padlen) / KW_SEMIBLOCK_LENGTH) + 1;
- s = 6 * ( semiblocks - 1 );
+ s = 6 * (semiblocks - 1);
- if( mode == MBEDTLS_KW_MODE_KWP
- && in_len <= KW_SEMIBLOCK_LENGTH )
- {
- memcpy( inbuff, output, 16 );
- ret = mbedtls_cipher_update( &ctx->cipher_ctx,
- inbuff, 16, output, &olen );
- if( ret != 0 )
+ if (mode == MBEDTLS_KW_MODE_KWP
+ && in_len <= KW_SEMIBLOCK_LENGTH) {
+ memcpy(inbuff, output, 16);
+ ret = mbedtls_cipher_update(&ctx->cipher_ctx,
+ inbuff, 16, output, &olen);
+ if (ret != 0) {
goto cleanup;
- }
- else
- {
+ }
+ } else {
unsigned char *R2 = output + KW_SEMIBLOCK_LENGTH;
unsigned char *A = output;
/*
* Do the wrapping function W, as defined in RFC 3394 section 2.2.1
*/
- if( semiblocks < MIN_SEMIBLOCKS_COUNT )
- {
+ if (semiblocks < MIN_SEMIBLOCKS_COUNT) {
ret = MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
goto cleanup;
}
/* Calculate intermediate values */
- for( t = 1; t <= s; t++ )
- {
- memcpy( inbuff, A, KW_SEMIBLOCK_LENGTH );
- memcpy( inbuff + KW_SEMIBLOCK_LENGTH, R2, KW_SEMIBLOCK_LENGTH );
-
- ret = mbedtls_cipher_update( &ctx->cipher_ctx,
- inbuff, 16, outbuff, &olen );
- if( ret != 0 )
+ for (t = 1; t <= s; t++) {
+ memcpy(inbuff, A, KW_SEMIBLOCK_LENGTH);
+ memcpy(inbuff + KW_SEMIBLOCK_LENGTH, R2, KW_SEMIBLOCK_LENGTH);
+
+ ret = mbedtls_cipher_update(&ctx->cipher_ctx,
+ inbuff, 16, outbuff, &olen);
+ if (ret != 0) {
goto cleanup;
+ }
- memcpy( A, outbuff, KW_SEMIBLOCK_LENGTH );
- calc_a_xor_t( A, t );
+ memcpy(A, outbuff, KW_SEMIBLOCK_LENGTH);
+ calc_a_xor_t(A, t);
- memcpy( R2, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH );
+ memcpy(R2, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH);
R2 += KW_SEMIBLOCK_LENGTH;
- if( R2 >= output + ( semiblocks * KW_SEMIBLOCK_LENGTH ) )
+ if (R2 >= output + (semiblocks * KW_SEMIBLOCK_LENGTH)) {
R2 = output + KW_SEMIBLOCK_LENGTH;
+ }
}
}
@@ -255,14 +236,13 @@ int mbedtls_nist_kw_wrap( mbedtls_nist_kw_context *ctx,
cleanup:
- if( ret != 0)
- {
- memset( output, 0, semiblocks * KW_SEMIBLOCK_LENGTH );
+ if (ret != 0) {
+ memset(output, 0, semiblocks * KW_SEMIBLOCK_LENGTH);
}
- mbedtls_platform_zeroize( inbuff, KW_SEMIBLOCK_LENGTH * 2 );
- mbedtls_platform_zeroize( outbuff, KW_SEMIBLOCK_LENGTH * 2 );
+ mbedtls_platform_zeroize(inbuff, KW_SEMIBLOCK_LENGTH * 2);
+ mbedtls_platform_zeroize(outbuff, KW_SEMIBLOCK_LENGTH * 2);
- return( ret );
+ return ret;
}
/*
@@ -273,13 +253,13 @@ cleanup:
* 3. Minimal number of semiblocks is 3.
* 4. A is a buffer to hold the first semiblock of the input buffer.
*/
-static int unwrap( mbedtls_nist_kw_context *ctx,
- const unsigned char *input, size_t semiblocks,
- unsigned char A[KW_SEMIBLOCK_LENGTH],
- unsigned char *output, size_t* out_len )
+static int unwrap(mbedtls_nist_kw_context *ctx,
+ const unsigned char *input, size_t semiblocks,
+ unsigned char A[KW_SEMIBLOCK_LENGTH],
+ unsigned char *output, size_t *out_len)
{
int ret = 0;
- const size_t s = 6 * ( semiblocks - 1 );
+ const size_t s = 6 * (semiblocks - 1);
size_t olen;
uint64_t t = 0;
unsigned char outbuff[KW_SEMIBLOCK_LENGTH * 2];
@@ -287,148 +267,141 @@ static int unwrap( mbedtls_nist_kw_context *ctx,
unsigned char *R = NULL;
*out_len = 0;
- if( semiblocks < MIN_SEMIBLOCKS_COUNT )
- {
- return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+ if (semiblocks < MIN_SEMIBLOCKS_COUNT) {
+ return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
}
- memcpy( A, input, KW_SEMIBLOCK_LENGTH );
- memmove( output, input + KW_SEMIBLOCK_LENGTH, ( semiblocks - 1 ) * KW_SEMIBLOCK_LENGTH );
- R = output + ( semiblocks - 2 ) * KW_SEMIBLOCK_LENGTH;
+ memcpy(A, input, KW_SEMIBLOCK_LENGTH);
+ memmove(output, input + KW_SEMIBLOCK_LENGTH, (semiblocks - 1) * KW_SEMIBLOCK_LENGTH);
+ R = output + (semiblocks - 2) * KW_SEMIBLOCK_LENGTH;
/* Calculate intermediate values */
- for( t = s; t >= 1; t-- )
- {
- calc_a_xor_t( A, t );
+ for (t = s; t >= 1; t--) {
+ calc_a_xor_t(A, t);
- memcpy( inbuff, A, KW_SEMIBLOCK_LENGTH );
- memcpy( inbuff + KW_SEMIBLOCK_LENGTH, R, KW_SEMIBLOCK_LENGTH );
+ memcpy(inbuff, A, KW_SEMIBLOCK_LENGTH);
+ memcpy(inbuff + KW_SEMIBLOCK_LENGTH, R, KW_SEMIBLOCK_LENGTH);
- ret = mbedtls_cipher_update( &ctx->cipher_ctx,
- inbuff, 16, outbuff, &olen );
- if( ret != 0 )
+ ret = mbedtls_cipher_update(&ctx->cipher_ctx,
+ inbuff, 16, outbuff, &olen);
+ if (ret != 0) {
goto cleanup;
+ }
- memcpy( A, outbuff, KW_SEMIBLOCK_LENGTH );
+ memcpy(A, outbuff, KW_SEMIBLOCK_LENGTH);
/* Set R as LSB64 of outbuff */
- memcpy( R, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH );
+ memcpy(R, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH);
- if( R == output )
- R = output + ( semiblocks - 2 ) * KW_SEMIBLOCK_LENGTH;
- else
+ if (R == output) {
+ R = output + (semiblocks - 2) * KW_SEMIBLOCK_LENGTH;
+ } else {
R -= KW_SEMIBLOCK_LENGTH;
+ }
}
- *out_len = ( semiblocks - 1 ) * KW_SEMIBLOCK_LENGTH;
+ *out_len = (semiblocks - 1) * KW_SEMIBLOCK_LENGTH;
cleanup:
- if( ret != 0)
- memset( output, 0, ( semiblocks - 1 ) * KW_SEMIBLOCK_LENGTH );
- mbedtls_platform_zeroize( inbuff, sizeof( inbuff ) );
- mbedtls_platform_zeroize( outbuff, sizeof( outbuff ) );
+ if (ret != 0) {
+ memset(output, 0, (semiblocks - 1) * KW_SEMIBLOCK_LENGTH);
+ }
+ mbedtls_platform_zeroize(inbuff, sizeof(inbuff));
+ mbedtls_platform_zeroize(outbuff, sizeof(outbuff));
- return( ret );
+ return ret;
}
/*
* KW-AD as defined in SP 800-38F section 6.2
* KWP-AD as defined in SP 800-38F section 6.3
*/
-int mbedtls_nist_kw_unwrap( mbedtls_nist_kw_context *ctx,
- mbedtls_nist_kw_mode_t mode,
- const unsigned char *input, size_t in_len,
- unsigned char *output, size_t *out_len, size_t out_size )
+int mbedtls_nist_kw_unwrap(mbedtls_nist_kw_context *ctx,
+ mbedtls_nist_kw_mode_t mode,
+ const unsigned char *input, size_t in_len,
+ unsigned char *output, size_t *out_len, size_t out_size)
{
int ret = 0;
- size_t i, olen;
+ size_t olen;
unsigned char A[KW_SEMIBLOCK_LENGTH];
- unsigned char diff, bad_padding = 0;
+ int diff;
*out_len = 0;
- if( out_size < in_len - KW_SEMIBLOCK_LENGTH )
- {
- return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+ if (out_size < in_len - KW_SEMIBLOCK_LENGTH) {
+ return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
}
- if( mode == MBEDTLS_KW_MODE_KW )
- {
+ if (mode == MBEDTLS_KW_MODE_KW) {
/*
* According to SP 800-38F Table 1, the ciphertext length for KW
* must be between 3 to 2^54 semiblocks inclusive.
*/
- if( in_len < 24 ||
+ if (in_len < 24 ||
#if SIZE_MAX > 0x200000000000000
in_len > 0x200000000000000 ||
#endif
- in_len % KW_SEMIBLOCK_LENGTH != 0 )
- {
- return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+ in_len % KW_SEMIBLOCK_LENGTH != 0) {
+ return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
}
- ret = unwrap( ctx, input, in_len / KW_SEMIBLOCK_LENGTH,
- A, output, out_len );
- if( ret != 0 )
+ ret = unwrap(ctx, input, in_len / KW_SEMIBLOCK_LENGTH,
+ A, output, out_len);
+ if (ret != 0) {
goto cleanup;
+ }
/* Check ICV in "constant-time" */
- diff = mbedtls_ct_memcmp( NIST_KW_ICV1, A, KW_SEMIBLOCK_LENGTH );
+ diff = mbedtls_ct_memcmp(NIST_KW_ICV1, A, KW_SEMIBLOCK_LENGTH);
- if( diff != 0 )
- {
+ if (diff != 0) {
ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
goto cleanup;
}
- }
- else if( mode == MBEDTLS_KW_MODE_KWP )
- {
+ } else if (mode == MBEDTLS_KW_MODE_KWP) {
size_t padlen = 0;
uint32_t Plen;
/*
* According to SP 800-38F Table 1, the ciphertext length for KWP
* must be between 2 to 2^29 semiblocks inclusive.
*/
- if( in_len < KW_SEMIBLOCK_LENGTH * 2 ||
+ if (in_len < KW_SEMIBLOCK_LENGTH * 2 ||
#if SIZE_MAX > 0x100000000
in_len > 0x100000000 ||
#endif
- in_len % KW_SEMIBLOCK_LENGTH != 0 )
- {
- return( MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA );
+ in_len % KW_SEMIBLOCK_LENGTH != 0) {
+ return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
}
- if( in_len == KW_SEMIBLOCK_LENGTH * 2 )
- {
+ if (in_len == KW_SEMIBLOCK_LENGTH * 2) {
unsigned char outbuff[KW_SEMIBLOCK_LENGTH * 2];
- ret = mbedtls_cipher_update( &ctx->cipher_ctx,
- input, 16, outbuff, &olen );
- if( ret != 0 )
+ ret = mbedtls_cipher_update(&ctx->cipher_ctx,
+ input, 16, outbuff, &olen);
+ if (ret != 0) {
goto cleanup;
+ }
- memcpy( A, outbuff, KW_SEMIBLOCK_LENGTH );
- memcpy( output, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH );
- mbedtls_platform_zeroize( outbuff, sizeof( outbuff ) );
+ memcpy(A, outbuff, KW_SEMIBLOCK_LENGTH);
+ memcpy(output, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH);
+ mbedtls_platform_zeroize(outbuff, sizeof(outbuff));
*out_len = KW_SEMIBLOCK_LENGTH;
- }
- else
- {
+ } else {
/* in_len >= KW_SEMIBLOCK_LENGTH * 3 */
- ret = unwrap( ctx, input, in_len / KW_SEMIBLOCK_LENGTH,
- A, output, out_len );
- if( ret != 0 )
+ ret = unwrap(ctx, input, in_len / KW_SEMIBLOCK_LENGTH,
+ A, output, out_len);
+ if (ret != 0) {
goto cleanup;
+ }
}
/* Check ICV in "constant-time" */
- diff = mbedtls_ct_memcmp( NIST_KW_ICV2, A, KW_SEMIBLOCK_LENGTH / 2 );
+ diff = mbedtls_ct_memcmp(NIST_KW_ICV2, A, KW_SEMIBLOCK_LENGTH / 2);
- if( diff != 0 )
- {
+ if (diff != 0) {
ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
}
- Plen = MBEDTLS_GET_UINT32_BE( A, KW_SEMIBLOCK_LENGTH / 2 );
+ Plen = MBEDTLS_GET_UINT32_BE(A, KW_SEMIBLOCK_LENGTH / 2);
/*
* Plen is the length of the plaintext, when the input is valid.
@@ -436,68 +409,62 @@ int mbedtls_nist_kw_unwrap( mbedtls_nist_kw_context *ctx,
* larger than 8, because of the type wrap around.
*/
padlen = in_len - KW_SEMIBLOCK_LENGTH - Plen;
- if ( padlen > 7 )
- {
- padlen &= 7;
- ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
- }
+ ret = mbedtls_ct_error_if(mbedtls_ct_uint_gt(padlen, 7),
+ MBEDTLS_ERR_CIPHER_AUTH_FAILED, ret);
+ padlen &= 7;
/* Check padding in "constant-time" */
- for( diff = 0, i = 0; i < KW_SEMIBLOCK_LENGTH; i++ )
- {
- if( i >= KW_SEMIBLOCK_LENGTH - padlen )
- diff |= output[*out_len - KW_SEMIBLOCK_LENGTH + i];
- else
- bad_padding |= output[*out_len - KW_SEMIBLOCK_LENGTH + i];
- }
+ const uint8_t zero[KW_SEMIBLOCK_LENGTH] = { 0 };
+ diff = mbedtls_ct_memcmp_partial(
+ &output[*out_len - KW_SEMIBLOCK_LENGTH], zero,
+ KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH - padlen, 0);
- if( diff != 0 )
- {
+ if (diff != 0) {
ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
}
- if( ret != 0 )
- {
+ if (ret != 0) {
goto cleanup;
}
- memset( output + Plen, 0, padlen );
+ memset(output + Plen, 0, padlen);
*out_len = Plen;
- }
- else
- {
+ } else {
ret = MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
goto cleanup;
}
cleanup:
- if( ret != 0 )
- {
- memset( output, 0, *out_len );
+ if (ret != 0) {
+ memset(output, 0, *out_len);
*out_len = 0;
}
- mbedtls_platform_zeroize( &bad_padding, sizeof( bad_padding) );
- mbedtls_platform_zeroize( &diff, sizeof( diff ) );
- mbedtls_platform_zeroize( A, sizeof( A ) );
+ mbedtls_platform_zeroize(&diff, sizeof(diff));
+ mbedtls_platform_zeroize(A, sizeof(A));
- return( ret );
+ return ret;
}
#endif /* !MBEDTLS_NIST_KW_ALT */
#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
-#define KW_TESTS 3
-
/*
* Test vectors taken from NIST
* https://csrc.nist.gov/Projects/Cryptographic-Algorithm-Validation-Program/CAVP-TESTING-BLOCK-CIPHER-MODES#KW
*/
-static const unsigned int key_len[KW_TESTS] = { 16, 24, 32 };
+static const unsigned int key_len[] = {
+ 16,
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
+ 24,
+ 32
+#endif
+};
-static const unsigned char kw_key[KW_TESTS][32] = {
+static const unsigned char kw_key[][32] = {
{ 0x75, 0x75, 0xda, 0x3a, 0x93, 0x60, 0x7c, 0xc2,
0xbf, 0xd8, 0xce, 0xc7, 0xaa, 0xdf, 0xd9, 0xa6 },
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
{ 0x2d, 0x85, 0x26, 0x08, 0x1d, 0x02, 0xfb, 0x5b,
0x85, 0xf6, 0x9a, 0xc2, 0x86, 0xec, 0xd5, 0x7d,
0x40, 0xdf, 0x5d, 0xf3, 0x49, 0x47, 0x44, 0xd3 },
@@ -505,11 +472,13 @@ static const unsigned char kw_key[KW_TESTS][32] = {
0x4a, 0x98, 0x48, 0xd3, 0x0f, 0xdd, 0x78, 0x33,
0x5b, 0x03, 0x9a, 0x48, 0xa8, 0x96, 0x2c, 0x4d,
0x1c, 0xb7, 0x8e, 0xab, 0xd5, 0xda, 0xd7, 0x88 }
+#endif
};
-static const unsigned char kw_msg[KW_TESTS][40] = {
+static const unsigned char kw_msg[][40] = {
{ 0x42, 0x13, 0x6d, 0x3c, 0x38, 0x4a, 0x3e, 0xea,
0xc9, 0x5a, 0x06, 0x6f, 0xd2, 0x8f, 0xed, 0x3f },
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
{ 0x95, 0xc1, 0x1b, 0xf5, 0x35, 0x3a, 0xfe, 0xdb,
0x98, 0xfd, 0xd6, 0xc8, 0xca, 0x6f, 0xdb, 0x6d,
0xa5, 0x4b, 0x74, 0xb4, 0x99, 0x0f, 0xdc, 0x45,
@@ -518,14 +487,28 @@ static const unsigned char kw_msg[KW_TESTS][40] = {
{ 0x1b, 0x20, 0xbf, 0x19, 0x90, 0xb0, 0x65, 0xd7,
0x98, 0xe1, 0xb3, 0x22, 0x64, 0xad, 0x50, 0xa8,
0x74, 0x74, 0x92, 0xba, 0x09, 0xa0, 0x4d, 0xd1 }
+#endif
};
-static const size_t kw_msg_len[KW_TESTS] = { 16, 40, 24 };
-static const size_t kw_out_len[KW_TESTS] = { 24, 48, 32 };
-static const unsigned char kw_res[KW_TESTS][48] = {
+static const size_t kw_msg_len[] = {
+ 16,
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
+ 40,
+ 24
+#endif
+};
+static const size_t kw_out_len[] = {
+ 24,
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
+ 48,
+ 32
+#endif
+};
+static const unsigned char kw_res[][48] = {
{ 0x03, 0x1f, 0x6b, 0xd7, 0xe6, 0x1e, 0x64, 0x3d,
0xf6, 0x85, 0x94, 0x81, 0x6f, 0x64, 0xca, 0xa3,
0xf5, 0x6f, 0xab, 0xea, 0x25, 0x48, 0xf5, 0xfb },
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
{ 0x44, 0x3c, 0x6f, 0x15, 0x09, 0x83, 0x71, 0x91,
0x3e, 0x5c, 0x81, 0x4c, 0xa1, 0xa0, 0x42, 0xec,
0x68, 0x2f, 0x7b, 0x13, 0x6d, 0x24, 0x3a, 0x4d,
@@ -536,11 +519,13 @@ static const unsigned char kw_res[KW_TESTS][48] = {
0xd5, 0xd5, 0x40, 0xec, 0x25, 0xd4, 0x3d, 0x87,
0x20, 0x0f, 0xda, 0xdc, 0x6d, 0x1f, 0x05, 0xd9,
0x16, 0x58, 0x4f, 0xa9, 0xf6, 0xcb, 0xf5, 0x12 }
+#endif
};
-static const unsigned char kwp_key[KW_TESTS][32] = {
+static const unsigned char kwp_key[][32] = {
{ 0x78, 0x65, 0xe2, 0x0f, 0x3c, 0x21, 0x65, 0x9a,
0xb4, 0x69, 0x0b, 0x62, 0x9c, 0xdf, 0x3c, 0xc4 },
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
{ 0xf5, 0xf8, 0x96, 0xa3, 0xbd, 0x2f, 0x4a, 0x98,
0x23, 0xef, 0x16, 0x2b, 0x00, 0xb8, 0x05, 0xd7,
0xde, 0x1e, 0xa4, 0x66, 0x26, 0x96, 0xa2, 0x58 },
@@ -548,23 +533,33 @@ static const unsigned char kwp_key[KW_TESTS][32] = {
0x25, 0x54, 0xee, 0x2a, 0x8d, 0xf1, 0x38, 0x6f,
0x5b, 0x94, 0xa1, 0xa6, 0x0e, 0xd8, 0xa4, 0xae,
0xf6, 0x0a, 0x8d, 0x61, 0xab, 0x5f, 0x22, 0x5a }
+#endif
};
-static const unsigned char kwp_msg[KW_TESTS][31] = {
+static const unsigned char kwp_msg[][31] = {
{ 0xbd, 0x68, 0x43, 0xd4, 0x20, 0x37, 0x8d, 0xc8,
0x96 },
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
{ 0x6c, 0xcd, 0xd5, 0x85, 0x18, 0x40, 0x97, 0xeb,
0xd5, 0xc3, 0xaf, 0x3e, 0x47, 0xd0, 0x2c, 0x19,
0x14, 0x7b, 0x4d, 0x99, 0x5f, 0x96, 0x43, 0x66,
0x91, 0x56, 0x75, 0x8c, 0x13, 0x16, 0x8f },
{ 0xd1 }
+#endif
+};
+static const size_t kwp_msg_len[] = {
+ 9,
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
+ 31,
+ 1
+#endif
};
-static const size_t kwp_msg_len[KW_TESTS] = { 9, 31, 1 };
-static const unsigned char kwp_res[KW_TESTS][48] = {
+static const unsigned char kwp_res[][48] = {
{ 0x41, 0xec, 0xa9, 0x56, 0xd4, 0xaa, 0x04, 0x7e,
0xb5, 0xcf, 0x4e, 0xfe, 0x65, 0x96, 0x61, 0xe7,
0x4d, 0xb6, 0xf8, 0xc5, 0x64, 0xe2, 0x35, 0x00 },
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
{ 0x4e, 0x9b, 0xc2, 0xbc, 0xbc, 0x6c, 0x1e, 0x13,
0xd3, 0x35, 0xbc, 0xc0, 0xf7, 0x73, 0x6a, 0x88,
0xfa, 0x87, 0x53, 0x66, 0x15, 0xbb, 0x8e, 0x63,
@@ -572,133 +567,157 @@ static const unsigned char kwp_res[KW_TESTS][48] = {
0x67, 0xcf, 0xa9, 0x8a, 0x9d, 0x0e, 0x33, 0x26 },
{ 0x06, 0xba, 0x7a, 0xe6, 0xf3, 0x24, 0x8c, 0xfd,
0xcf, 0x26, 0x75, 0x07, 0xfa, 0x00, 0x1b, 0xc4 }
+#endif
+};
+static const size_t kwp_out_len[] = {
+ 24,
+#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
+ 40,
+ 16
+#endif
};
-static const size_t kwp_out_len[KW_TESTS] = { 24, 40, 16 };
-int mbedtls_nist_kw_self_test( int verbose )
+int mbedtls_nist_kw_self_test(int verbose)
{
mbedtls_nist_kw_context ctx;
unsigned char out[48];
size_t olen;
int i;
int ret = 0;
- mbedtls_nist_kw_init( &ctx );
+ mbedtls_nist_kw_init(&ctx);
- for( i = 0; i < KW_TESTS; i++ )
+ /*
+ * KW mode
+ */
{
- if( verbose != 0 )
- mbedtls_printf( " KW-AES-%u ", (unsigned int) key_len[i] * 8 );
-
- ret = mbedtls_nist_kw_setkey( &ctx, MBEDTLS_CIPHER_ID_AES,
- kw_key[i], key_len[i] * 8, 1 );
- if( ret != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( " KW: setup failed " );
-
- goto end;
+ static const int num_tests = sizeof(kw_key) / sizeof(*kw_key);
+
+ for (i = 0; i < num_tests; i++) {
+ if (verbose != 0) {
+ mbedtls_printf(" KW-AES-%u ", (unsigned int) key_len[i] * 8);
+ }
+
+ ret = mbedtls_nist_kw_setkey(&ctx, MBEDTLS_CIPHER_ID_AES,
+ kw_key[i], key_len[i] * 8, 1);
+ if (ret != 0) {
+ if (verbose != 0) {
+ mbedtls_printf(" KW: setup failed ");
+ }
+
+ goto end;
+ }
+
+ ret = mbedtls_nist_kw_wrap(&ctx, MBEDTLS_KW_MODE_KW, kw_msg[i],
+ kw_msg_len[i], out, &olen, sizeof(out));
+ if (ret != 0 || kw_out_len[i] != olen ||
+ memcmp(out, kw_res[i], kw_out_len[i]) != 0) {
+ if (verbose != 0) {
+ mbedtls_printf("failed. ");
+ }
+
+ ret = 1;
+ goto end;
+ }
+
+ if ((ret = mbedtls_nist_kw_setkey(&ctx, MBEDTLS_CIPHER_ID_AES,
+ kw_key[i], key_len[i] * 8, 0))
+ != 0) {
+ if (verbose != 0) {
+ mbedtls_printf(" KW: setup failed ");
+ }
+
+ goto end;
+ }
+
+ ret = mbedtls_nist_kw_unwrap(&ctx, MBEDTLS_KW_MODE_KW,
+ out, olen, out, &olen, sizeof(out));
+
+ if (ret != 0 || olen != kw_msg_len[i] ||
+ memcmp(out, kw_msg[i], kw_msg_len[i]) != 0) {
+ if (verbose != 0) {
+ mbedtls_printf("failed\n");
+ }
+
+ ret = 1;
+ goto end;
+ }
+
+ if (verbose != 0) {
+ mbedtls_printf(" passed\n");
+ }
}
-
- ret = mbedtls_nist_kw_wrap( &ctx, MBEDTLS_KW_MODE_KW, kw_msg[i],
- kw_msg_len[i], out, &olen, sizeof( out ) );
- if( ret != 0 || kw_out_len[i] != olen ||
- memcmp( out, kw_res[i], kw_out_len[i] ) != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( "failed. ");
-
- ret = 1;
- goto end;
- }
-
- if( ( ret = mbedtls_nist_kw_setkey( &ctx, MBEDTLS_CIPHER_ID_AES,
- kw_key[i], key_len[i] * 8, 0 ) )
- != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( " KW: setup failed ");
-
- goto end;
- }
-
- ret = mbedtls_nist_kw_unwrap( &ctx, MBEDTLS_KW_MODE_KW,
- out, olen, out, &olen, sizeof( out ) );
-
- if( ret != 0 || olen != kw_msg_len[i] ||
- memcmp( out, kw_msg[i], kw_msg_len[i] ) != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( "failed\n" );
-
- ret = 1;
- goto end;
- }
-
- if( verbose != 0 )
- mbedtls_printf( " passed\n" );
}
- for( i = 0; i < KW_TESTS; i++ )
+ /*
+ * KWP mode
+ */
{
- olen = sizeof( out );
- if( verbose != 0 )
- mbedtls_printf( " KWP-AES-%u ", (unsigned int) key_len[i] * 8 );
-
- ret = mbedtls_nist_kw_setkey( &ctx, MBEDTLS_CIPHER_ID_AES, kwp_key[i],
- key_len[i] * 8, 1 );
- if( ret != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( " KWP: setup failed " );
-
- goto end;
- }
- ret = mbedtls_nist_kw_wrap( &ctx, MBEDTLS_KW_MODE_KWP, kwp_msg[i],
- kwp_msg_len[i], out, &olen, sizeof( out ) );
-
- if( ret != 0 || kwp_out_len[i] != olen ||
- memcmp( out, kwp_res[i], kwp_out_len[i] ) != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( "failed. ");
-
- ret = 1;
- goto end;
- }
-
- if( ( ret = mbedtls_nist_kw_setkey( &ctx, MBEDTLS_CIPHER_ID_AES,
- kwp_key[i], key_len[i] * 8, 0 ) )
- != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( " KWP: setup failed ");
-
- goto end;
- }
-
- ret = mbedtls_nist_kw_unwrap( &ctx, MBEDTLS_KW_MODE_KWP, out,
- olen, out, &olen, sizeof( out ) );
-
- if( ret != 0 || olen != kwp_msg_len[i] ||
- memcmp( out, kwp_msg[i], kwp_msg_len[i] ) != 0 )
- {
- if( verbose != 0 )
- mbedtls_printf( "failed. ");
-
- ret = 1;
- goto end;
+ static const int num_tests = sizeof(kwp_key) / sizeof(*kwp_key);
+
+ for (i = 0; i < num_tests; i++) {
+ olen = sizeof(out);
+ if (verbose != 0) {
+ mbedtls_printf(" KWP-AES-%u ", (unsigned int) key_len[i] * 8);
+ }
+
+ ret = mbedtls_nist_kw_setkey(&ctx, MBEDTLS_CIPHER_ID_AES, kwp_key[i],
+ key_len[i] * 8, 1);
+ if (ret != 0) {
+ if (verbose != 0) {
+ mbedtls_printf(" KWP: setup failed ");
+ }
+
+ goto end;
+ }
+ ret = mbedtls_nist_kw_wrap(&ctx, MBEDTLS_KW_MODE_KWP, kwp_msg[i],
+ kwp_msg_len[i], out, &olen, sizeof(out));
+
+ if (ret != 0 || kwp_out_len[i] != olen ||
+ memcmp(out, kwp_res[i], kwp_out_len[i]) != 0) {
+ if (verbose != 0) {
+ mbedtls_printf("failed. ");
+ }
+
+ ret = 1;
+ goto end;
+ }
+
+ if ((ret = mbedtls_nist_kw_setkey(&ctx, MBEDTLS_CIPHER_ID_AES,
+ kwp_key[i], key_len[i] * 8, 0))
+ != 0) {
+ if (verbose != 0) {
+ mbedtls_printf(" KWP: setup failed ");
+ }
+
+ goto end;
+ }
+
+ ret = mbedtls_nist_kw_unwrap(&ctx, MBEDTLS_KW_MODE_KWP, out,
+ olen, out, &olen, sizeof(out));
+
+ if (ret != 0 || olen != kwp_msg_len[i] ||
+ memcmp(out, kwp_msg[i], kwp_msg_len[i]) != 0) {
+ if (verbose != 0) {
+ mbedtls_printf("failed. ");
+ }
+
+ ret = 1;
+ goto end;
+ }
+
+ if (verbose != 0) {
+ mbedtls_printf(" passed\n");
+ }
}
-
- if( verbose != 0 )
- mbedtls_printf( " passed\n" );
}
end:
- mbedtls_nist_kw_free( &ctx );
+ mbedtls_nist_kw_free(&ctx);
- if( verbose != 0 )
- mbedtls_printf( "\n" );
+ if (verbose != 0) {
+ mbedtls_printf("\n");
+ }
- return( ret );
+ return ret;
}
#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-05 13:23:48 +0000