Remove ecp_sub()
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3 changed files with 1 additions and 45 deletions
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@ -61,6 +61,7 @@ API Changes
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Removals
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Removals
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* Removed mbedtls_ecp_group_read_string(). Only named groups are supported.
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* Removed mbedtls_ecp_group_read_string(). Only named groups are supported.
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* Removed mbedtls_ecp_sub().
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* Removed individual mdX_hmac and shaX_hmac functions (use generic
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* Removed individual mdX_hmac and shaX_hmac functions (use generic
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md_hmac functions from md.h)
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md_hmac functions from md.h)
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* Removed the PBKDF2 module (use PKCS5).
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* Removed the PBKDF2 module (use PKCS5).
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@ -498,23 +498,6 @@ int mbedtls_ecp_tls_write_group( const mbedtls_ecp_group *grp, size_t *olen,
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int mbedtls_ecp_add( const mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
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int mbedtls_ecp_add( const mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
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const mbedtls_ecp_point *P, const mbedtls_ecp_point *Q );
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const mbedtls_ecp_point *P, const mbedtls_ecp_point *Q );
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/**
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* \brief Subtraction: R = P - Q
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*
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* \param grp ECP group
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* \param R Destination point
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* \param P Left-hand point
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* \param Q Right-hand point
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*
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* \return 0 if successful,
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* MBEDTLS_ERR_MPI_MALLOC_FAILED if memory allocation failed
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*
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* \note This function does not support Montgomery curves, such as
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* Curve25519.
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*/
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int mbedtls_ecp_sub( const mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
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const mbedtls_ecp_point *P, const mbedtls_ecp_point *Q );
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/**
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/**
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* \brief Multiplication by an integer: R = m * P
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* \brief Multiplication by an integer: R = m * P
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* (Not thread-safe to use same group in multiple threads)
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* (Not thread-safe to use same group in multiple threads)
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@ -1066,34 +1066,6 @@ cleanup:
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return( ret );
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return( ret );
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}
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}
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/*
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* Subtraction: R = P - Q, result's coordinates normalized
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*/
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int mbedtls_ecp_sub( const mbedtls_ecp_group *grp, mbedtls_ecp_point *R,
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const mbedtls_ecp_point *P, const mbedtls_ecp_point *Q )
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{
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int ret;
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mbedtls_ecp_point mQ;
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mbedtls_ecp_point_init( &mQ );
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if( ecp_get_type( grp ) != ECP_TYPE_SHORT_WEIERSTRASS )
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return( MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE );
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/* mQ = - Q */
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MBEDTLS_MPI_CHK( mbedtls_ecp_copy( &mQ, Q ) );
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if( mbedtls_mpi_cmp_int( &mQ.Y, 0 ) != 0 )
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MBEDTLS_MPI_CHK( mbedtls_mpi_sub_mpi( &mQ.Y, &grp->P, &mQ.Y ) );
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MBEDTLS_MPI_CHK( ecp_add_mixed( grp, R, P, &mQ ) );
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MBEDTLS_MPI_CHK( ecp_normalize_jac( grp, R ) );
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cleanup:
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mbedtls_ecp_point_free( &mQ );
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return( ret );
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}
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/*
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/*
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* Randomize jacobian coordinates:
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* Randomize jacobian coordinates:
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* (X, Y, Z) -> (l^2 X, l^3 Y, l Z) for random l
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* (X, Y, Z) -> (l^2 X, l^3 Y, l Z) for random l
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