scc::crypto::RsaOaepDecrypt Class Reference

RSA OAEP decryption. More...

#include <rsa.h>

Public Member Functions
	RsaOaepDecrypt (RsaPrivateKey &, Hash::Algorithm=Hash::sha1_type)
	Construct an RSA decryptor. More...
int	max_msg_size () const
	The maximum allowable plain text message length in bytes. More...
int	cipher_size () const
	Cipher text length in bytes. More...
int	decrypt (void *, int, const void *, int, const void *=nullptr, int=0)
	Decrypt a message. More...

Detailed Description

RSA OAEP decryption.

Decrypts using OAEP scheme. Requires a private key, and choice of hash algorithm.

Hash algoritm comes from scc::crypto::Hash.

Definition at line 372 of file rsa.h.

Constructor & Destructor Documentation

RsaOaepDecrypt()

scc::crypto::RsaOaepDecrypt::RsaOaepDecrypt	(	RsaPrivateKey &	,
		Hash::Algorithm	= Hash::sha1_type
	)

Construct an RSA decryptor.

Parameters

key	Valid private key.
hash_type	Hash algorithm from scc::crypto::Hash.

Member Function Documentation

cipher_size()

int scc::crypto::RsaOaepDecrypt::cipher_size

(

)

const

Cipher text length in bytes.

len(public key width)

decrypt()

int scc::crypto::RsaOaepDecrypt::decrypt	(	void *	,
		int	,
		const void *	,
		int	,
		const void *	= nullptr,
		int	= 0
	)

Decrypt a message.

Parameters

msg_loc	Plaintext message buffer, will be zeroed before decryption.
msg_len	Plaintext size, must be exactly max_msg_size()
cipher_loc	Encrypted ciphertext buffer
cipher_len	Ciphertext size, must be exactly cipher_size()
label_loc	Optional label, which will be verified but not encrypted
label_len	Label length

Returns

The size of the decrypted message, or -1 if the decryption failed.

max_msg_size()

int scc::crypto::RsaOaepDecrypt::max_msg_size

(

)

const

The maximum allowable plain text message length in bytes.

len(public key width) - 2*size(hash output) - 2

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The documentation for this class was generated from the following file:

• crypto/pub/crypto/rsa.h