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Merge remote-tracking branch 'upstream-public/pr/2267' into development

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This commit is contained in:
Jaeden Amero
2018-12-07 16:17:12 +00:00
parent faafcd83a8 172ba63463
commit 01b34fb316
4 changed files with 40 additions and 7 deletions
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40
library/ecp.c
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@ -47,6 +47,35 @@
#include MBEDTLS_CONFIG_FILE
#endif
/**
* \brief Function level alternative implementation.
*
* The MBEDTLS_ECP_INTERNAL_ALT macro enables alternative implementations to
* replace certain functions in this module. The alternative implementations are
* typically hardware accelerators and need to activate the hardware before the
* computation starts and deactivate it after it finishes. The
* mbedtls_internal_ecp_init() and mbedtls_internal_ecp_free() functions serve
* this purpose.
*
* To preserve the correct functionality the following conditions must hold:
*
* - The alternative implementation must be activated by
* mbedtls_internal_ecp_init() before any of the replaceable functions is
* called.
* - mbedtls_internal_ecp_free() must \b only be called when the alternative
* implementation is activated.
* - mbedtls_internal_ecp_init() must \b not be called when the alternative
* implementation is activated.
* - Public functions must not return while the alternative implementation is
* activated.
* - Replaceable functions are guarded by \c MBEDTLS_ECP_XXX_ALT macros and
* before calling them an \code if( mbedtls_internal_ecp_grp_capable( grp ) )
* \endcode ensures that the alternative implementation supports the current
* group.
*/
#if defined(MBEDTLS_ECP_INTERNAL_ALT)
#endif
#if defined(MBEDTLS_ECP_C)
#include "mbedtls/ecp.h"
@ -2412,11 +2441,6 @@ int mbedtls_ecp_muladd_restartable(
mbedtls_ecp_point_init( &mP );
#if defined(MBEDTLS_ECP_INTERNAL_ALT)
if( ( is_grp_capable = mbedtls_internal_ecp_grp_capable( grp ) ) )
MBEDTLS_MPI_CHK( mbedtls_internal_ecp_init( grp ) );
#endif /* MBEDTLS_ECP_INTERNAL_ALT */
ECP_RS_ENTER( ma );
#if defined(MBEDTLS_ECP_RESTARTABLE)
@ -2444,6 +2468,12 @@ int mbedtls_ecp_muladd_restartable(
mul2:
#endif
MBEDTLS_MPI_CHK( mbedtls_ecp_mul_shortcuts( grp, pR, n, Q, rs_ctx ) );
#if defined(MBEDTLS_ECP_INTERNAL_ALT)
if( ( is_grp_capable = mbedtls_internal_ecp_grp_capable( grp ) ) )
MBEDTLS_MPI_CHK( mbedtls_internal_ecp_init( grp ) );
#endif /* MBEDTLS_ECP_INTERNAL_ALT */
#if defined(MBEDTLS_ECP_RESTARTABLE)
if( rs_ctx != NULL && rs_ctx->ma != NULL )
rs_ctx->ma->state = ecp_rsma_add;