uECC_sign() function

Generate an ECDSA signature for a given hash value. @warning A cryptographically-secure PRNG function must be set (using uECC_set_rng()) before calling uECC_sign().

Syntax

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Summary

Declaration

Definition

from ecc_dsa.h:105

int uECC_sign(const uint8_t *p_private_key, const uint8_t *p_message_hash, unsigned p_hash_size, uint8_t *p_signature, uECC_Curve curve);

Implemented in ecc_dsa.c:161

Arguments

Argument

Declared as

Description

p_private_key

const uint8_t *

IN -- Your private key.

p_message_hash

const uint8_t *

IN -- The hash of the message to sign.

p_hash_size

unsigned

IN -- The size of p_message_hash in bytes.

p_signature

uint8_t *

OUT -- Will be filled in with the signature value. Must be at least 2 * curve size long (for secp256r1, signature must be 64 bytes long).

curve

uECC_Curve

Return value

returns TC_CRYPTO_SUCCESS (1) if the signature generated successfully returns TC_CRYPTO_FAIL (0) if an error occurred.

Notes

Usage: Compute a hash of the data you wish to sign (SHA-2 is recommended) and pass it in to this function along with your private key. side-channel countermeasure: algorithm strengthened against timing attack.

Examples

References

from examples

uECC_sign() function

Syntax

Arguments

Return value

Notes

Examples

References

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