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Diffstat (limited to 'src/libstrongswan/plugins/ntru/ntru_param_set.h')
| -rw-r--r-- | src/libstrongswan/plugins/ntru/ntru_param_set.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/src/libstrongswan/plugins/ntru/ntru_param_set.h b/src/libstrongswan/plugins/ntru/ntru_param_set.h new file mode 100644 index 000000000..df4e55333 --- /dev/null +++ b/src/libstrongswan/plugins/ntru/ntru_param_set.h @@ -0,0 +1,118 @@ +/* + * Copyright (C) 2014 Andreas Steffen + * HSR Hochschule fuer Technik Rapperswil + * + * Copyright (C) 2009-2013 Security Innovation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +/** + * @defgroup ntru_param_set ntru_param_set + * @{ @ingroup ntru_p + */ + +#ifndef NTRU_PARAM_SET_H_ +#define NTRU_PARAM_SET_H_ + +typedef enum ntru_param_set_id_t ntru_param_set_id_t; +typedef struct ntru_param_set_t ntru_param_set_t; + +#include <library.h> + +/** + * Encoding types for NTRU encryption public/private key blobs + */ +#define NTRU_PUBKEY_TAG 0x01 +#define NTRU_PRIVKEY_DEFAULT_TAG 0x02 +#define NTRU_PRIVKEY_TRITS_TAG 0xfe +#define NTRU_PRIVKEY_INDICES_TAG 0xff + +/** + * Size in octets of the OID designating the NTRU encryption parameter set + */ +#define NTRU_OID_LEN 3 + +/** + * Packing types for NTRU encryption public/private keys + */ +#define NTRU_KEY_PACKED_COEFFICIENTS 0x01 +#define NTRU_KEY_PACKED_INDICES 0x02 +#define NTRU_KEY_PACKED_TRITS 0x03 + +/** + * NTRU encryption parameter set ID list + */ +enum ntru_param_set_id_t { + /* X9.98/IEEE 1363.1 parameter sets for best bandwidth (smallest size) */ + NTRU_EES401EP1, + NTRU_EES449EP1, + NTRU_EES677EP1, + NTRU_EES1087EP2, + /* X9.98/IEEE 1363.1 parameter sets balancing speed and bandwidth */ + NTRU_EES541EP1, + NTRU_EES613EP1, + NTRU_EES887EP1, + NTRU_EES1171EP1, + /* X9.98/IEEE 1363.1 parameter sets for best speed */ + NTRU_EES659EP1, + NTRU_EES761EP1, + NTRU_EES1087EP1, + NTRU_EES1499EP1, + /* Best bandwidth and speed, no X9.98 compatibility */ + NTRU_EES401EP2, + NTRU_EES439EP1, + NTRU_EES593EP1, + NTRU_EES743EP1, +}; + +extern enum_name_t *ntru_param_set_id_names; + +/** + * NTRU encryption parameter set definitions + */ +struct ntru_param_set_t { + ntru_param_set_id_t id; /* NTRU parameter set ID */ + uint8_t oid[NTRU_OID_LEN]; /* pointer to OID */ + uint8_t der_id; /* parameter-set DER id */ + uint8_t N_bits; /* no. of bits in N (i.e. in an index */ + uint16_t N; /* ring dimension */ + uint16_t sec_strength_len; /* no. of octets of security strength */ + uint16_t q; /* big modulus */ + uint8_t q_bits; /* no. of bits in q (i.e. in a coefficient */ + bool is_product_form; /* if product form used */ + uint32_t dF_r; /* no. of +1 or -1 coefficients in ring elements + F, r */ + uint16_t dg; /* no. - 1 of +1 coefficients or + no. of -1 coefficients in ring element g */ + uint16_t m_len_max; /* max no. of plaintext octets */ + uint16_t min_msg_rep_wt; /* min. message representative weight */ + uint8_t c_bits; /* no. bits in candidate for deriving an index */ + uint8_t m_len_len; /* no. of octets to hold mLenOctets */ +}; + +/** + * Get NTRU encryption parameter set by NTRU parameter set ID + * + * @param id NTRU parameter set ID + * @return NTRU parameter set +*/ +ntru_param_set_t* ntru_param_set_get_by_id(ntru_param_set_id_t id); + +/** + * Get NTRU encryption parameter set by NTRU parameter set OID + * + * @param oid NTRU parameter set OID + * @return NTRU parameter set +*/ +ntru_param_set_t* ntru_param_set_get_by_oid(uint8_t const *oid); + +#endif /** NTRU_PARAM_SET_H_ @}*/ |