ocrypto_rsa_oaep_sha256_check_padding()

int ocrypto_rsa_oaep_sha256_check_padding	(	uint8_t *	m,
		size_t	m_len,
		uint8_t *	em,
		size_t	em_len,
		const uint8_t *	label,
		size_t	l_len
	)

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

RSA OAEP SHA256 unpadding.

Parameters

[out]	m	The unpadded message. The buffer must be long enough to hold the message.
	m_len	Length of m.
	em	The padded message.
	em_len	Length of em.
	label	The label associated with the message.
	l_len	Length of label. May be 0.

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.