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Stop checking for argument change

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This was intended to detect aborted operations, but now that case is handled
by the caller freeing the restart context.

Also, as the internal sub-context is managed by the callee, no need for the
caller to free/reset the restart context between successful calls.
This commit is contained in:
Manuel Pégourié-Gonnard 2017-04-20 09:47:06 +02:00
parent 3cade22f96
commit 8467e6848d
3 changed files with 6 additions and 29 deletions
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14
include/mbedtls/ecp.h
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@ -263,9 +263,10 @@ typedef struct
*
* If more operations are needed to complete a computation,
* MBEDTLS_ERR_ECP_IN_PROGRESS will be returned by the
* function performing the computation. That function will
* then need to be called again with the same arguments until
* it returns 0 or an other error code.
* function performing the computation. It is then the
* caller's responsibility to either call again with the same
* arguments until it returns 0 or an error code; or to free
* the restart context if the operation is to be aborted.
*
* This only affects functions that accept a pointer to a
* \c mbedtls_ecp_restart_ctx as an argument, and only works
@ -615,14 +616,11 @@ int mbedtls_ecp_mul( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
* \param P Point to multiply
* \param f_rng RNG function (see notes)
* \param p_rng RNG parameter
* \param rs_ctx Restart context - must be non-NULL to enable early-return
* \param rs_ctx Restart context
*
* \return See \c mbedtls_ecp_mul(), or
* MBEDTLS_ERR_ECP_IN_PROGRESS if maximum number of
* operations was reached (see \c mbedtls_ecp_set_max_ops()),
* indicating the function should be called again with the
* exact same arguments.
*
* operations was reached: see \c mbedtls_ecp_set_max_ops().
*/
int mbedtls_ecp_mul_restartable( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
const mbedtls_mpi *m, const mbedtls_ecp_point *P,