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Avoid re-checking argument on restart
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@ -2115,9 +2115,19 @@ int mbedtls_ecp_mul_restartable( mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
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#endif /* MBEDTLS_ECP_INTERNAL_ALT */
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/* Common sanity checks */
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MBEDTLS_MPI_CHK( mbedtls_ecp_check_privkey( grp, m ) );
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MBEDTLS_MPI_CHK( mbedtls_ecp_check_pubkey( grp, P ) );
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#if defined(MBEDTLS_ECP_EARLY_RETURN) && defined(ECP_SHORTWEIERSTRASS)
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/* skip argument check when restarting */
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if( ecp_get_type( grp ) != ECP_TYPE_SHORT_WEIERSTRASS ||
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rs_ctx == NULL || rs_ctx->rsm == NULL )
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#endif
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{
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/* Common sanity checks */
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MBEDTLS_MPI_CHK( mbedtls_ecp_check_privkey( grp, m ) );
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MBEDTLS_MPI_CHK( mbedtls_ecp_check_pubkey( grp, P ) );
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/* check_privkey is 0M and check_pubkey is 3M */
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ECP_BUDGET( 3 );
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}
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ret = MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
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#if defined(ECP_MONTGOMERY)
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