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Add function parsing a TLS ECParameters record

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Manuel Pégourié-Gonnard 2013-02-09 17:03:58 +01:00
parent cf4a70c8ed
commit 1a96728964
4 changed files with 96 additions and 9 deletions
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37
include/polarssl/ecp.h
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@ -89,12 +89,14 @@ ecp_group;
* \warning This library does not support validation of arbitrary domain
* parameters. Therefore, only well-known domain parameters from trusted
* sources should be used. See ecp_use_known_dp().
*
* \note The values are taken from RFC 4492's enum NamedCurve.
*/
#define POLARSSL_ECP_DP_SECP192R1 0
#define POLARSSL_ECP_DP_SECP224R1 1
#define POLARSSL_ECP_DP_SECP256R1 2
#define POLARSSL_ECP_DP_SECP384R1 3
#define POLARSSL_ECP_DP_SECP521R1 4
#define POLARSSL_ECP_DP_SECP192R1 19
#define POLARSSL_ECP_DP_SECP224R1 21
#define POLARSSL_ECP_DP_SECP256R1 23
#define POLARSSL_ECP_DP_SECP384R1 24
#define POLARSSL_ECP_DP_SECP521R1 25
/**
* Maximum bit size of the groups (that is, of N)
@ -120,6 +122,12 @@ ecp_group;
#define POLARSSL_ECP_PF_UNCOMPRESSED 0 /**< Uncompressed point format */
#define POLARSSL_ECP_PF_COMPRESSED 1 /**< Compressed point format */
/*
* Some constants from RFC 4492 (ECC for TLS)
*/
#define POLARSSL_ECP_TLS_NAMED_CURVE 3 /**< ECCurveType named_curve */
#ifdef __cplusplus
extern "C" {
#endif
@ -259,6 +267,7 @@ int ecp_write_binary( const ecp_group *grp, const ecp_point *P, int format,
*/
int ecp_read_binary( const ecp_group *grp, ecp_point *P, int format,
const unsigned char *buf, size_t ilen );
/**
* \brief Set a group using well-known domain parameters
*
@ -269,9 +278,23 @@ int ecp_read_binary( const ecp_group *grp, ecp_point *P, int format,
* POLARSSL_ERR_MPI_XXX if initialization failed
* POLARSSL_ERR_ECP_GENERIC if index is out of range
*
* \note Index should be a POLARSSL_ECP_DP_XXX macro.
* \note Index should be a value of RFC 4492's enum NamdeCurve,
* possibly in the form of a POLARSSL_ECP_DP_XXX macro.
*/
int ecp_use_known_dp( ecp_group *grp, size_t index );
int ecp_use_known_dp( ecp_group *grp, uint16_t index );
/**
* \brief Read a group from an ECParameters record
*
* \param grp Destination group
* \param buf Start of input buffer
* \param len Buffer length
*
* \return O if successful,
* POLARSSL_ERR_MPI_XXX if initialization failed
* POLARSSL_ERR_ECP_BAD_INPUT_DATA if input is invalid
*/
int ecp_tls_read_group( ecp_group *grp, const unsigned char *buf, size_t len );
/**
* \brief Addition: R = P + Q