1 /* 2 * Copyright (c) 2001-2021, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 #ifndef ECP_COMMON_H 7 #define ECP_COMMON_H 8 #ifdef __cplusplus 9 extern "C" 10 { 11 #endif 12 13 14 #include "cc_pal_types_plat.h" 15 #include "cc_ecpki_types.h" 16 #include "mbedtls/ecp.h" 17 18 /* 19 *\brief Curve types 20 * 21 */ 22 typedef enum 23 { 24 ECP_TYPE_NONE = 0, 25 ECP_TYPE_SHORT_WEIERSTRASS, /* y^2 = x^3 + a x + b */ 26 ECP_TYPE_25519, /* MONTGOMERY : y^2 = x^3 + a x^2 + x EDWARDS: x^2 + y^2 = 1 + dx^2y^2 (modp) */ 27 } ecp_curve_type; 28 29 /** 30 * \brief mapping CC ECP return codes to mbedtls 31 * 32 */ 33 int error_mapping_cc_to_mbedtls_ecc (CCError_t cc_error); 34 35 /** 36 * \brief get the cfurve type 37 * 38 */ ecp_get_type(const mbedtls_ecp_group * grp)39static inline ecp_curve_type ecp_get_type(const mbedtls_ecp_group *grp) 40 { 41 if (grp->G.MBEDTLS_PRIVATE(X).MBEDTLS_PRIVATE(p) == NULL) 42 return (ECP_TYPE_NONE); 43 44 if (grp->G.MBEDTLS_PRIVATE(Y).MBEDTLS_PRIVATE(p) == NULL) 45 return (ECP_TYPE_25519); 46 else 47 return (ECP_TYPE_SHORT_WEIERSTRASS); 48 } 49 50 /** 51 * \brief map mbedtls group id to CC domain id 52 * 53 */ 54 55 int ecp_grp_id_to_domain_id (const mbedtls_ecp_group_id id, CCEcpkiDomainID_t *domain_id); 56 57 #ifdef __cplusplus 58 } 59 #endif 60 61 #endif /* MBEDTLS_COMMON_H */ 62
