ocrypto_rsa_oaep_sha256_decrypt()

int ocrypto_rsa_oaep_sha256_decrypt	(	uint8_t *	m,
		size_t	m_len,
		const uint8_t *	c,
		size_t	c_len,
		const uint8_t *	label,
		size_t	l_len,
		const ocrypto_rsa_key *	key,
		uint32_t *	mem )

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

RSA OAEP SHA256 decryption.

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.
	label	The label associated with the message.
	l_len	Length of label. May be 0.
	key	A valid RSA secret key.
	mem	The working memory. Length OCRYPTO_RSA_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_key.

c, m, and mem may be same.