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1) move the change into Features from Changes, in the changLog
2) Change the feature alternative configuration MBEDTLS_ECDH_ALT
definition to function alternative defintions
MBEDTLS_ECDH_COMPUTE_SHARED_ALT and MBEDTLS_ECDH_GEN_PUBLIC_ALT
This commit is contained in:
Ron Eldor 2017-10-10 19:04:27 +03:00
parent 8b766218a8
commit a84c1cb355
4 changed files with 17 additions and 7 deletions
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5
ChangeLog
View file

@ -36,8 +36,11 @@ Changes
* Clarify ECDSA documentation and improve the sample code to avoid
misunderstandings and potentially dangerous use of the API. Pointed out
by Jean-Philippe Aumasson.
Features
* Add support for alternative implementation for ECDH, controlled by new
configuration flag MBEDTLS_ECDH_ALT in config.h.
configuration flags MBEDTLS_ECDH_COMPUTE_SHARED_ALT and
MBEDTLS_ECDH_GEN_PUBLIC_ALT in config.h.
The following functions from the ECDH module can be replaced
with an alternative implementation:
mbedtls_ecdh_gen_public() and mbedtls_ecdh_compute_shared().

3
include/mbedtls/config.h
View file

@ -238,7 +238,6 @@
//#define MBEDTLS_BLOWFISH_ALT
//#define MBEDTLS_CAMELLIA_ALT
//#define MBEDTLS_DES_ALT
//#define MBEDTLS_ECDH_ALT
//#define MBEDTLS_XTEA_ALT
//#define MBEDTLS_MD2_ALT
//#define MBEDTLS_MD4_ALT
@ -295,6 +294,8 @@
//#define MBEDTLS_AES_SETKEY_DEC_ALT
//#define MBEDTLS_AES_ENCRYPT_ALT
//#define MBEDTLS_AES_DECRYPT_ALT
//#define MBEDTLS_ECDH_GEN_PUBLIC_ALT
//#define MBEDTLS_ECDH_GEN_PUBLIC_ALT
/**
* \def MBEDTLS_ECP_INTERNAL_ALT

7
library/ecdh.c
View file

@ -38,7 +38,7 @@
#include <string.h>
#if !defined(MBEDTLS_ECDH_ALT)
#if !defined(MBEDTLS_ECDH_GEN_PUBLIC_ALT)
/*
* Generate public key: simple wrapper around mbedtls_ecp_gen_keypair
*/
@ -48,7 +48,9 @@ int mbedtls_ecdh_gen_public( mbedtls_ecp_group *grp, mbedtls_mpi *d, mbedtls_ecp
{
return mbedtls_ecp_gen_keypair( grp, d, Q, f_rng, p_rng );
}
#endif /* MBEDTLS_ECDH_GEN_PUBLIC_ALT */
#if !defined(MBEDTLS_ECDH_COMPUTE_SHARED_ALT)
/*
* Compute shared secret (SEC1 3.3.1)
*/
@ -82,7 +84,8 @@ cleanup:
return( ret );
}
#endif /* MBEDTLS_ECDH_ALT */
#endif /* MBEDTLS_ECDH_COMPUTE_SHARED_ALT */
/*
* Initialize context
*/

9
library/version_features.c
View file

@ -93,9 +93,6 @@ static const char *features[] = {
#if defined(MBEDTLS_DES_ALT)
"MBEDTLS_DES_ALT",
#endif /* MBEDTLS_DES_ALT */
#if defined(MBEDTLS_ECDH_ALT)
"MBEDTLS_ECDH_ALT",
#endif /* MBEDTLS_ECDH_ALT */
#if defined(MBEDTLS_XTEA_ALT)
"MBEDTLS_XTEA_ALT",
#endif /* MBEDTLS_XTEA_ALT */
@ -165,6 +162,12 @@ static const char *features[] = {
#if defined(MBEDTLS_AES_DECRYPT_ALT)
"MBEDTLS_AES_DECRYPT_ALT",
#endif /* MBEDTLS_AES_DECRYPT_ALT */
#if defined(MBEDTLS_ECDH_GEN_PUBLIC_ALT)
"MBEDTLS_ECDH_GEN_PUBLIC_ALT",
#endif /* MBEDTLS_ECDH_GEN_PUBLIC_ALT */
#if defined(MBEDTLS_ECDH_GEN_PUBLIC_ALT)
"MBEDTLS_ECDH_GEN_PUBLIC_ALT",
#endif /* MBEDTLS_ECDH_GEN_PUBLIC_ALT */
#if defined(MBEDTLS_ECP_INTERNAL_ALT)
"MBEDTLS_ECP_INTERNAL_ALT",
#endif /* MBEDTLS_ECP_INTERNAL_ALT */