intmbedtls_ecp_mul(mbedtls_ecp_group*grp,mbedtls_ecp_point*R, constmbedtls_mpi*m, constmbedtls_ecp_point*P, int(*f_rng)(void *, unsigned char *, size_t), void *p_rng) Multiplication by an integer: R = m * P (Not thread-safe to use same group in multiple threads) ...
0 if successful, or a MBEDTLS_ERR_ECP_XXX or MBEDTLS_MPI_XXX error code Note: If f_rng is not NULL, it is used to implement countermeasures against potential elaborate timing attacks, seembedtls_ecp_mul()for details. Definition at line54of fileecdh.c. ...
* For more information, see mbedtls_ecp_mul(). * * \param grp The ECP group to use. This must be initialized and have * domain parameters loaded, for example through * mbedtls_ecp_load() or mbedtls_ecp_tls_read_group(). * \param z The destination MPI (shared secret). * This must...
mbedTLS中使用ecp_group_load函数加载参数,需要定义一下SM2的椭圆曲线,在定义曲线参数时字节序跟SM2规范的上的顺序不一样,这里需要注意一下,当时在这里折腾了很久。 staticconstmbedtls_mpi_uint sm2256_p[]={BYTES_TO_T_UINT_8(0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF),BYTES_TO_T_UINT_8(0x00,0x...
An open source, portable, easy to use, readable and flexible TLS library, and reference implementation of the PSA Cryptography API. Releases are on a varying cadence, typically around 3 - 6 months between releases. - mbedtls/include/mbedtls/ecp.h at e820
如果定义MBEDTLS_ECP_NIST_OPTIM,验证签名的函数执行时间为240ms左右,双向验证的TLS连接时间为850ms; 而定义MBEDTLS_ECP_NIST_OPTIM并直接嵌套汇编代码优化大数乘法,验证签名的函数执行时间为160ms,双向认证的TLS连接时间为600ms 汇编代码对比
@@ -2632,11 +2622,11 @@ int mbedtls_ecp_mul_restartable( mbedtls_ecp_group *grp, mbedtls_ecp_point *R, ret = MBEDTLS_ERR_ECP_BAD_INPUT_DATA; #if defined(ECP_MONTGOMERY) if( ecp_get_type( grp ) == ECP_TYPE_MONTGOMERY ) if( mbedtls_ecp_get_type( grp ) == MBEDTLS_ECP_TYPE_...
E.g MBEDTLS_ECP_DP_SECP521R1_ENABLED definition is disabled. I think this is becouse LTC supports 512 bit modulo as maximum. But even I enable this flag and disable LTC usage by undefine //#define MBEDTLS_ECP_MUL_COMB_ALT//#define MBEDTLS_ECP_ADD_ALT I still not able to pass any te...
==2927== by 0x55001AC: ecp_mul_comb (ecp.c:2080) ==2927== by 0x55011AB: mbedtls_ecp_mul_restartable (ecp.c:2369) ==2927== by 0x54FADE2: ecdh_compute_shared_restartable (ecdh.c:122) ==2927== by 0x54FAE82: mbedtls_ecdh_compute_shared (ecdh.c:151) ...
int(*MBEDTLS_PRIVATE(t_post))(mbedtls_ecp_point *, void *); /*!< Unused. */ void *MBEDTLS_PRIVATE(t_data); /*!< Unused. */ mbedtls_ecp_point *MBEDTLS_PRIVATE(T); /*!< Pre-computed points for ecp_mul_comb(). */