ocrypto_rsa_crt_exp()

int ocrypto_rsa_crt_exp	(	uint8_t *	m,
		size_t	m_len,
		const uint8_t *	c,
		size_t	c_len,
		const ocrypto_rsa_crt_key *	key,
		uint32_t *	mem
	)

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

RSA CRT key exponentiation. m = (c^dp mod p - c^dq mod q) * qinv mod p * q + c^dq mod q

Parameters

[out]	m	The generated message.
	m_len	Length of m.
	c	The ciphertext to be decrypted.
	c_len	Length of c.
	key	A valid RSA secret key with CRT coefficients.
	mem	The working memory. Length OCRYPTO_RSA_CRT_MEM_SIZE(bits).

Return values

-1	If the input is too large (c >= n).
0	On success.

Remarks

The key key should be initialized with ocrypto_rsa_init_crt_key.

c, m, and mem may be same.