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Avoid code duplication in ecp_mul()

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Manuel Pégourié-Gonnard 2017-04-20 10:10:59 +02:00
parent 646393bb1e
commit 884569cdb4
1 changed files with 12 additions and 30 deletions
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42
library/ecp.c
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@ -2089,11 +2089,15 @@ cleanup:
#endif /* ECP_MONTGOMERY */ #endif /* ECP_MONTGOMERY */
/* /*
* Multiplication R = m * P * Restartable multiplication R = m * P
*/ */
int mbedtls_ecp_mul( mbedtls_ecp_group *grp, mbedtls_ecp_point *R, #if !defined(MBEDTLS_ECP_EARLY_RETURN)
static
#endif
int mbedtls_ecp_mul_restartable( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
const mbedtls_mpi *m, const mbedtls_ecp_point *P, const mbedtls_mpi *m, const mbedtls_ecp_point *P,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
mbedtls_ecp_restart_ctx *rs_ctx )
{ {
int ret = MBEDTLS_ERR_ECP_BAD_INPUT_DATA; int ret = MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
#if defined(MBEDTLS_ECP_INTERNAL_ALT) #if defined(MBEDTLS_ECP_INTERNAL_ALT)
@ -2122,7 +2126,7 @@ int mbedtls_ecp_mul( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
#endif #endif
#if defined(ECP_SHORTWEIERSTRASS) #if defined(ECP_SHORTWEIERSTRASS)
if( ecp_get_type( grp ) == ECP_TYPE_SHORT_WEIERSTRASS ) if( ecp_get_type( grp ) == ECP_TYPE_SHORT_WEIERSTRASS )
ret = ecp_mul_comb( grp, R, m, P, f_rng, p_rng, NULL ); ret = ecp_mul_comb( grp, R, m, P, f_rng, p_rng, rs_ctx );
#endif #endif
#if defined(MBEDTLS_ECP_INTERNAL_ALT) #if defined(MBEDTLS_ECP_INTERNAL_ALT)
@ -2137,37 +2141,15 @@ cleanup:
return( ret ); return( ret );
} }
#if defined(MBEDTLS_ECP_EARLY_RETURN)
/* /*
* Restartable multiplication R = m * P * Multiplication R = m * P
*/ */
int mbedtls_ecp_mul_restartable( mbedtls_ecp_group *grp, mbedtls_ecp_point *R, int mbedtls_ecp_mul( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
const mbedtls_mpi *m, const mbedtls_ecp_point *P, const mbedtls_mpi *m, const mbedtls_ecp_point *P,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng, int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
mbedtls_ecp_restart_ctx *rs_ctx )
{ {
/* temporary code duplication with non-restartable version */ return( mbedtls_ecp_mul_restartable( grp, R, m, P, f_rng, p_rng, NULL ) );
int ret;
/* Common sanity checks */
if( mbedtls_mpi_cmp_int( &P->Z, 1 ) != 0 )
return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
if( ( ret = mbedtls_ecp_check_privkey( grp, m ) ) != 0 ||
( ret = mbedtls_ecp_check_pubkey( grp, P ) ) != 0 )
return( ret );
#if defined(ECP_MONTGOMERY)
if( ecp_get_type( grp ) == ECP_TYPE_MONTGOMERY )
return( ecp_mul_mxz( grp, R, m, P, f_rng, p_rng ) );
#endif
#if defined(ECP_SHORTWEIERSTRASS)
if( ecp_get_type( grp ) == ECP_TYPE_SHORT_WEIERSTRASS )
return( ecp_mul_comb( grp, R, m, P, f_rng, p_rng, rs_ctx ) );
#endif
return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
} }
#endif
#if defined(ECP_SHORTWEIERSTRASS) #if defined(ECP_SHORTWEIERSTRASS)
/* /*