uECC_shared_secret() function

Compute a shared secret given your secret key and someone else's public key. @warning It is recommended to use the output of uECC_shared_secret() as the input of a recommended Key Derivation Function (see NIST SP 800-108) in order to produce a cryptographically secure symmetric key.

Syntax

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Declaration

Definition

from ecc_dh.h:124

int uECC_shared_secret(const uint8_t *p_public_key, const uint8_t *p_private_key, uint8_t *p_secret, uECC_Curve curve);

Implemented in ecc_dh.c:144

Arguments

Argument

Description

p_public_key

IN -- The public key of the remote party.

p_private_key

IN -- Your private key.

p_secret

OUT -- Will be filled in with the shared secret value. Must be the same size as the curve size (for curve secp256r1, secret must be 32 bytes long.

curve

Return value

returns TC_CRYPTO_SUCCESS (1) if the shared secret was computed successfully returns TC_CRYPTO_FAIL (0) otherwise

Examples

References

from examples

uECC_shared_secret() function

Syntax

Arguments

Return value

Examples

References

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