ocrypto_srp_server_premaster_secret()

int ocrypto_srp_server_premaster_secret	(	uint8_t	s[(384)],
		const uint8_t	pub_a[(384)],
		const uint8_t	priv_b[(32)],
		const uint8_t *	u,
		size_t	u_len,
		const uint8_t	v[(384)]
	)

#include <crypto/nrf_oberon/include/ocrypto_srp.h>

SRP-6 server premaster secret.

The premaster secret between the client and the server is computed using the client public key pub_a, the server private key priv_b, the scrambling parameter u and the password verifier v. If the client public key pub_a is valid, the premaster secret is then put into s. The premaster secret can be used to generate encryption keys.

Parameters

[out]	s	Generated premaster secret.
	pub_a	Client public key.
	priv_b	Server private key.
	u	Scrambling parameter; generated with ocrypto_srp_scrambling_parameter.
	u_len	Length of u.
	v	Password verifier.

Return values

0	If pub_a is a valid public key.
1	Otherwise.