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Introduce MBEDTLS_OPTIMIZE_TINYCRYPT_ASM

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Make the ASM optimizations in tinycrypt optional.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
This commit is contained in:
Andrzej Kurek 2020-10-14 12:24:20 +02:00
parent 7e62c31097
commit db0e50ea70
No known key found for this signature in database
GPG Key ID: 89A90840DC388527
7 changed files with 50 additions and 14 deletions
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2
configs/baremetal.h
View File

@ -116,6 +116,8 @@
MBEDTLS_SSL_EXTENDED_MS_ENFORCE_ENABLED
#define MBEDTLS_USE_TINYCRYPT
#define MBEDTLS_HAVE_ASM
#define MBEDTLS_OPTIMIZE_TINYCRYPT_ASM
/* X.509 CRT parsing */
#define MBEDTLS_X509_USE_C

6
include/mbedtls/check_config.h
View File

@ -130,6 +130,12 @@
#error "MBEDTLS_USE_TINYCRYPT defined, but not all prerequesites"
#endif
#if defined(MBEDTLS_OPTIMIZE_TINYCRYPT_ASM) && \
( !defined(MBEDTLS_HAVE_ASM) || \
!defined(MBEDTLS_USE_TINYCRYPT) )
#error "MBEDTLS_OPTIMIZE_TINYCRYPT_ASM defined, but not all prerequesites"
#endif
#if defined(MBEDTLS_NIST_KW_C) && \
( !defined(MBEDTLS_AES_C) || !defined(MBEDTLS_CIPHER_C) )
#error "MBEDTLS_NIST_KW_C defined, but not all prerequisites"

15
include/mbedtls/config.h
View File

@ -2702,6 +2702,21 @@
*/
//#define MBEDTLS_USE_TINYCRYPT
/**
* \def MBEDTLS_OPTIMIZE_TINYCRYPT_ASM
*
* Optimize TinyCrypt operations using assembly.
* Add T32/A32 assembly for core tinycrypt/microecc routines, for ARMC5 and GCC;
* Use fast integer types to avoid frequent narrowing instructions;
* Use __builtin_clz and avoid boolean ops.
*
* Requires: MBEDTLS_USE_TINYCRYPT
* MBEDTLS_HAVE_ASM
*
* Module: tinycrypt/ecc.c
*/
//#define MBEDTLS_OPTIMIZE_TINYCRYPT_ASM
/**
* \def MBEDTLS_ENTROPY_C
*

3
library/version_features.c
View File

@ -678,6 +678,9 @@ static const char *features[] = {
#if defined(MBEDTLS_USE_TINYCRYPT)
"MBEDTLS_USE_TINYCRYPT",
#endif /* MBEDTLS_USE_TINYCRYPT */
#if defined(MBEDTLS_OPTIMIZE_TINYCRYPT_ASM)
"MBEDTLS_OPTIMIZE_TINYCRYPT_ASM",
#endif /* MBEDTLS_OPTIMIZE_TINYCRYPT_ASM */
#if defined(MBEDTLS_ENTROPY_C)
"MBEDTLS_ENTROPY_C",
#endif /* MBEDTLS_ENTROPY_C */

8
programs/ssl/query_config.c
View File

@ -1850,6 +1850,14 @@ int query_config( const char *config )
}
#endif /* MBEDTLS_USE_TINYCRYPT */
#if defined(MBEDTLS_OPTIMIZE_TINYCRYPT_ASM)
if( strcmp( "MBEDTLS_OPTIMIZE_TINYCRYPT_ASM", config ) == 0 )
{
MACRO_EXPANSION_TO_STR( MBEDTLS_OPTIMIZE_TINYCRYPT_ASM );
return( 0 );
}
#endif /* MBEDTLS_OPTIMIZE_TINYCRYPT_ASM */
#if defined(MBEDTLS_ENTROPY_C)
if( strcmp( "MBEDTLS_ENTROPY_C", config ) == 0 )
{

2
scripts/config.pl
View File

@ -59,6 +59,7 @@
# MBEDTLS_CTR_DRBG_USE_128_BIT_KEY
# MBEDTLS_SSL_TRANSFORM_OPTIMIZE_CIPHERS
# MBEDTLS_VALIDATE_SSL_KEYS_INTEGRITY
# MBEDTLS_OPTIMIZE_TINYCRYPT_ASM
# and any symbol beginning _ALT
#
# The baremetal configuration excludes options that require a library or
@ -144,6 +145,7 @@ MBEDTLS_AES_SCA_COUNTERMEASURES
MBEDTLS_CTR_DRBG_USE_128_BIT_KEY
MBEDTLS_SSL_TRANSFORM_OPTIMIZE_CIPHERS
MBEDTLS_VALIDATE_SSL_KEYS_INTEGRITY
MBEDTLS_OPTIMIZE_TINYCRYPT_ASM
_ALT\s*$
);

28
tinycrypt/ecc.c
View File

@ -70,15 +70,15 @@
#include <string.h>
#include "mbedtls/platform_util.h"
#if defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM
#ifdef __CC_ARM
#pragma diag_suppress 667 // strict diagnostic: "asm" function is nonstandard
#endif
#if defined MBEDTLS_HAVE_ASM
#ifndef asm
#define asm __asm
#endif
#endif
#endif /* MBEDTLS_OPTIMIZE_TINYCRYPT_ASM */
/* Parameters for curve NIST P-256 aka secp256r1 */
const uECC_word_t curve_p[NUM_ECC_WORDS] = {
@ -214,7 +214,7 @@ int uECC_curve_public_key_size(void)
return 2 * NUM_ECC_BYTES;
}
#if defined MBEDTLS_HAVE_ASM && defined __CC_ARM
#if defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __CC_ARM
__asm void uECC_vli_clear(uECC_word_t *vli)
{
#if NUM_ECC_WORDS != 8
@ -237,7 +237,7 @@ __asm void uECC_vli_clear(uECC_word_t *vli)
BX lr
#endif
}
#elif defined MBEDTLS_HAVE_ASM && defined __GNUC__ && defined __arm__
#elif defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __GNUC__ && defined __arm__
void uECC_vli_clear(uECC_word_t *vli)
{
#if NUM_ECC_WORDS != 8
@ -281,7 +281,7 @@ void uECC_vli_clear(uECC_word_t *vli)
}
#endif
#if defined MBEDTLS_HAVE_ASM && defined __CC_ARM
#if defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __CC_ARM
__asm uECC_word_t uECC_vli_isZero(const uECC_word_t *vli)
{
#if NUM_ECC_WORDS != 8
@ -323,7 +323,7 @@ __asm uECC_word_t uECC_vli_isZero(const uECC_word_t *vli)
BX lr
#endif
}
#elif defined MBEDTLS_HAVE_ASM && defined __GNUC__ && defined __arm__
#elif defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __GNUC__ && defined __arm__
uECC_word_t uECC_vli_isZero(const uECC_word_t *vli)
{
uECC_word_t ret;
@ -501,7 +501,7 @@ uECC_word_t cond_set(uECC_word_t p_true, uECC_word_t p_false, unsigned int cond)
/* Computes result = left - right, returning borrow, in constant time.
* Can modify in place. */
#if defined MBEDTLS_HAVE_ASM && defined __CC_ARM
#if defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __CC_ARM
__asm uECC_word_t uECC_vli_sub(uECC_word_t *result, const uECC_word_t *left,
const uECC_word_t *right)
{
@ -556,7 +556,7 @@ __asm uECC_word_t uECC_vli_sub(uECC_word_t *result, const uECC_word_t *left,
POP {r4-r8,pc}
#endif
}
#elif defined MBEDTLS_HAVE_ASM && defined __GNUC__ && defined __arm__
#elif defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __GNUC__ && defined __arm__
uECC_word_t uECC_vli_sub(uECC_word_t *result, const uECC_word_t *left,
const uECC_word_t *right)
{
@ -638,7 +638,7 @@ uECC_word_t uECC_vli_sub(uECC_word_t *result, const uECC_word_t *left,
/* Computes result = left + right, returning carry, in constant time.
* Can modify in place. */
#if defined MBEDTLS_HAVE_ASM && defined __CC_ARM
#if defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __CC_ARM
static __asm uECC_word_t uECC_vli_add(uECC_word_t *result, const uECC_word_t *left,
const uECC_word_t *right)
{
@ -693,7 +693,7 @@ static __asm uECC_word_t uECC_vli_add(uECC_word_t *result, const uECC_word_t *le
POP {r4-r8,pc}
#endif
}
#elif defined MBEDTLS_HAVE_ASM && defined __GNUC__ && defined __arm__
#elif defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __GNUC__ && defined __arm__
static uECC_word_t uECC_vli_add(uECC_word_t *result, const uECC_word_t *left,
const uECC_word_t *right)
{
@ -779,7 +779,7 @@ cmpresult_t uECC_vli_cmp(const uECC_word_t *left, const uECC_word_t *right)
}
/* Computes vli = vli >> 1. */
#if defined MBEDTLS_HAVE_ASM && defined __CC_ARM
#if defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __CC_ARM
static __asm void uECC_vli_rshift1(uECC_word_t *vli)
{
#if defined __thumb__ && __TARGET_ARCH_THUMB < 4
@ -818,7 +818,7 @@ static __asm void uECC_vli_rshift1(uECC_word_t *vli)
BX lr
#endif
}
#elif defined MBEDTLS_HAVE_ASM && defined __GNUC__ && defined __arm__ && defined __thumb2__
#elif defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __GNUC__ && defined __arm__ && defined __thumb2__
static void uECC_vli_rshift1(uECC_word_t *vli)
{
register uECC_word_t *r0 asm ("r0") = vli;
@ -867,7 +867,7 @@ static void uECC_vli_rshift1(uECC_word_t *vli)
* [in] r: 3 words of operand to add
* [out] r: 3 words of result
*/
#if defined MBEDTLS_HAVE_ASM && defined __CC_ARM
#if defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __CC_ARM
static __asm void muladd(uECC_word_t a, uECC_word_t b, uECC_word_t r[3])
{
#if defined __thumb__ && __TARGET_ARCH_THUMB < 4
@ -917,7 +917,7 @@ static __asm void muladd(uECC_word_t a, uECC_word_t b, uECC_word_t r[3])
BX lr
#endif
}
#elif defined MBEDTLS_HAVE_ASM && defined __GNUC__ && defined __arm__
#elif defined MBEDTLS_OPTIMIZE_TINYCRYPT_ASM && defined __GNUC__ && defined __arm__
static void muladd(uECC_word_t a, uECC_word_t b, uECC_word_t r[3])
{
register uECC_word_t r0 asm ("r0") = a;