ocrypto_rsa1024_oaep_sha256_crt_decrypt()

int ocrypto_rsa1024_oaep_sha256_crt_decrypt	(	uint8_t *	m,
		size_t	m_len,
		const uint8_t	c[128],
		const uint8_t *	label,
		size_t	l_len,
		const ocrypto_rsa1024_crt_key *	sk )

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

1024-bit RSA OAEP SHA256 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 128-byte ciphertext to decrypt.
	label	The label associated with the message.
	l_len	Length of label. May be 0.
	sk	A valid 1024-bit RSA secret key with CRT coefficients.

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 sk should be initialized with ocrypto_rsa1024_init_crt_key.

m may be same as c.