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Annotation of src/usr.bin/ssh/xmss_wots.h, Revision 1.2

1.2     ! dtucker     1: /* $OpenBSD$ */
1.1       markus      2: /*
                      3: wots.h version 20160722
                      4: Andreas Hülsing
                      5: Joost Rijneveld
                      6: Public domain.
                      7: */
                      8:
                      9: #ifndef WOTS_H
                     10: #define WOTS_H
                     11:
                     12: #include "stdint.h"
                     13:
                     14: /**
                     15:  * WOTS parameter set
                     16:  *
                     17:  * Meaning as defined in draft-irtf-cfrg-xmss-hash-based-signatures-02
                     18:  */
                     19: typedef struct {
                     20:   uint32_t len_1;
                     21:   uint32_t len_2;
                     22:   uint32_t len;
                     23:   uint32_t n;
                     24:   uint32_t w;
                     25:   uint32_t log_w;
                     26:   uint32_t keysize;
                     27: } wots_params;
                     28:
                     29: /**
                     30:  * Set the WOTS parameters,
                     31:  * only m, n, w are required as inputs,
                     32:  * len, len_1, and len_2 are computed from those.
                     33:  *
                     34:  * Assumes w is a power of 2
                     35:  */
                     36: void wots_set_params(wots_params *params, int n, int w);
                     37:
                     38: /**
                     39:  * WOTS key generation. Takes a 32byte seed for the secret key, expands it to a full WOTS secret key and computes the corresponding public key.
                     40:  * For this it takes the seed pub_seed which is used to generate bitmasks and hash keys and the address of this WOTS key pair addr
                     41:  *
                     42:  * params, must have been initialized before using wots_set params for params ! This is not done in this function
                     43:  *
                     44:  * Places the computed public key at address pk.
                     45:  */
                     46: void wots_pkgen(unsigned char *pk, const unsigned char *sk, const wots_params *params, const unsigned char *pub_seed, uint32_t addr[8]);
                     47:
                     48: /**
                     49:  * Takes a m-byte message and the 32-byte seed for the secret key to compute a signature that is placed at "sig".
                     50:  *
                     51:  */
                     52: int wots_sign(unsigned char *sig, const unsigned char *msg, const unsigned char *sk, const wots_params *params, const unsigned char *pub_seed, uint32_t addr[8]);
                     53:
                     54: /**
                     55:  * Takes a WOTS signature, a m-byte message and computes a WOTS public key that it places at pk.
                     56:  *
                     57:  */
                     58: int wots_pkFromSig(unsigned char *pk, const unsigned char *sig, const unsigned char *msg, const wots_params *params, const unsigned char *pub_seed, uint32_t addr[8]);
                     59:
                     60: #endif