mbedtls_lmots_calculate_public_key_candidate() function

This function creates a candidate public key from an LMOTS signature. This can then be compared to the real public key to determine the validity of the signature.

Syntax

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Summary

Declaration

Definition

from lmots.h:144

int mbedtls_lmots_calculate_public_key_candidate(const mbedtls_lmots_parameters_t *params, const unsigned char *msg, size_t msg_size, const unsigned char *sig, size_t sig_size, unsigned char *out, size_t out_size, size_t *out_len);

Implemented in lmots.c:460

Arguments

Argument

Declared as

Description

params

const mbedtls_lmots_parameters_t *

The LMOTS parameter set, q and I values as an mbedtls_lmots_parameters_t struct.

msg

const unsigned char *

The buffer from which the message will be read.

msg_size

size_t

The size of the message that will be read.

sig

const unsigned char *

The buffer from which the signature will be read. #MBEDTLS_LMOTS_SIG_LEN bytes will be read from this.

sig_size

size_t

out

unsigned char *

The buffer where the candidate public key will be stored. Must be at least #MBEDTLS_LMOTS_N_HASH_LEN bytes in size.

out_size

size_t

out_len

size_t *

Return value

\c 0 on success. A non-zero error code on failure.

Notes

This function is exposed publicly to be used in LMS signature verification, it is expected that mbedtls_lmots_verify will be used for LMOTS signature verification.