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Added support for writing points compressed

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This commit is contained in:
Manuel Pégourié-Gonnard
2012-11-24 15:19:55 +01:00
committed by Paul Bakker
parent e19feb5b46
commit 37d218a8e3
4 changed files with 66 additions and 23 deletions
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11
include/polarssl/ecp.h
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@ -115,6 +115,12 @@ ecp_group;
*/
#define POLARSSL_ECP_WINDOW_SIZE 7 /**< Maximum NAF width used. */
/*
* Point formats
*/
#define POLARSSL_ECP_PF_UNCOMPRESSED 0 /**< Uncompressed point format */
#define POLARSSL_ECP_PF_COMPRESSED 1 /**< Compressed point format */
#ifdef __cplusplus
extern "C" {
#endif
@ -210,17 +216,18 @@ int ecp_group_read_string( ecp_group *grp, int radix,
const char *gx, const char *gy, const char *n);
/**
* \brief Export a point into unsigned binary data, uncompressed
* \brief Export a point into unsigned binary data
*
* \param grp Group the point belongs to
* \param P Point to export
* \param format Point format, should be a POLARSSL_ECP_PF_XXX macro
* \param olen Length of the actual ouput
* \param buf Output buffer
* \param buflen Length of the output buffer
*
* \return 0 if successful, or POLARSSL_ERR_ECP_GENERIC
*/
int ecp_write_binary( const ecp_group *grp, const ecp_point *P,
int ecp_write_binary( const ecp_group *grp, const ecp_point *P, int format,
size_t *olen, unsigned char *buf, size_t buflen );
/**