common/mbedtls/ecc_point_compression.h

   1 /*
   2 * Not original to the mbedtls library. Taken from
   3 * https://github.com/mwarning/mbedtls_ecp_compression
   4 * to solve mbedtls' lack of support for elliptic point
   5 * compression and decompression
   6 *
   7 * Released under CC0 1.0 Universal License
   8 */
   9
  10 /*
  11 * This is all about mbedtls_ecp_decompress() and mbedtls_ecp_compress()
  12 *
  13 * Perform X25519 / Curve25519 point compression and decompression for mbedtls.
  14 * As of mbedtls 2.5.1, mbedtls does not support decompression yet.
  15 *
  16 */
  17
  18 #include <string.h>
  19
  20 #include "mbedtls/ecp.h"
  21
  22 int mbedtls_ecp_decompress(
  23     const mbedtls_ecp_group *grp,
  24     const unsigned char *input, size_t ilen,
  25     unsigned char *output, size_t *olen, size_t osize
  26 );
  27
  28 int mbedtls_ecp_compress(
  29     const mbedtls_ecp_group *grp,
  30     const unsigned char *input, size_t ilen,
  31     unsigned char *output, size_t *olen, size_t osize
  32 );