ocrypto_rsa_pkcs1_v15_crt_decrypt()

int ocrypto_rsa_pkcs1_v15_crt_decrypt	(	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_operations.h>

RSA PKCS1 V1.5 decryption with CRT acceleration.

The ciphertext c is decrypted to the message returned in m.

Parameters

[out]	m	The decrypted message. The buffer must be long enough to hold the message.
	m_len	Length of m.
	c	The ciphertext to decrypt.
	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 decryption failed.
-2	If the output buffer is too short (m_len < length of message).
n	If a message of length n was successfully decrypted.

Remarks

The key key should be initialized with ocrypto_rsa_init_crt_key.

c, m, and mem may be same.