oribatida.h File Reference

Oribatida authenticated encryption algorithm. More...

#include "aead-common.h"

Go to the source code of this file.

Macros
#define	ORIBATIDA_256_KEY_SIZE   16
	Size of the key for Oribatida-256-64.
#define	ORIBATIDA_256_TAG_SIZE   16
	Size of the authentication tag for Oribatida-256-64.
#define	ORIBATIDA_256_NONCE_SIZE   16
	Size of the nonce for Oribatida-256-64.
#define	ORIBATIDA_192_KEY_SIZE   16
	Size of the key for Oribatida-192-96.
#define	ORIBATIDA_192_TAG_SIZE   12
	Size of the authentication tag for Oribatida-192-96.
#define	ORIBATIDA_192_NONCE_SIZE   8
	Size of the nonce for Oribatida-192-96.

Functions
int	oribatida_256_aead_encrypt (unsigned char *c, unsigned long long *clen, const unsigned char *m, unsigned long long mlen, const unsigned char *ad, unsigned long long adlen, const unsigned char *nsec, const unsigned char *npub, const unsigned char *k)
	Encrypts and authenticates a packet with Oribatida-256-64. More...
int	oribatida_256_aead_decrypt (unsigned char *m, unsigned long long *mlen, unsigned char *nsec, const unsigned char *c, unsigned long long clen, const unsigned char *ad, unsigned long long adlen, const unsigned char *npub, const unsigned char *k)
	Decrypts and authenticates a packet with Oribatida-256-64. More...
int	oribatida_192_aead_encrypt (unsigned char *c, unsigned long long *clen, const unsigned char *m, unsigned long long mlen, const unsigned char *ad, unsigned long long adlen, const unsigned char *nsec, const unsigned char *npub, const unsigned char *k)
	Encrypts and authenticates a packet with Oribatida-192-96. More...
int	oribatida_192_aead_decrypt (unsigned char *m, unsigned long long *mlen, unsigned char *nsec, const unsigned char *c, unsigned long long clen, const unsigned char *ad, unsigned long long adlen, const unsigned char *npub, const unsigned char *k)
	Decrypts and authenticates a packet with Oribatida-192-96. More...

Variables
aead_cipher_t const	oribatida_256_cipher
	Meta-information block for the Oribatida-256-64 cipher.
aead_cipher_t const	oribatida_192_cipher
	Meta-information block for the Oribatida-192-96 cipher.

Detailed Description

Oribatida authenticated encryption algorithm.

Oribatida is a family of authenticated encryption algorithms based on the SimP-256 and SimP-192 permutations which are built around reduced-round variants of the Simon-128-128 and Simon-96-96 block ciphers. There are two algorithms in the family:

• Oribatida-256-64 with a 128-bit key, a 128-bit nonce, and a 128-bit tag, built around the SimP-256 permutation. This is the primary member of the family.
• Oribatida-192-96 with a 128-bit key, a 64-bit nonce, and a 96-bit tag, built around the SimP-192 permutation.

References: https://www.isical.ac.in/~lightweight/oribatida/

Function Documentation

int oribatida_192_aead_decrypt	(	unsigned char *	m,
		unsigned long long *	mlen,
		unsigned char *	nsec,
		const unsigned char *	c,
		unsigned long long	clen,
		const unsigned char *	ad,
		unsigned long long	adlen,
		const unsigned char *	npub,
		const unsigned char *	k
	)

Decrypts and authenticates a packet with Oribatida-192-96.

Parameters

m	Buffer to receive the plaintext message on output.
mlen	Receives the length of the plaintext message on output.
nsec	Secret nonce - not used by this algorithm.
c	Buffer that contains the ciphertext and authentication tag to decrypt.
clen	Length of the input data in bytes, which includes the ciphertext and the 12 byte authentication tag.
ad	Buffer that contains associated data to authenticate along with the packet but which does not need to be encrypted.
adlen	Length of the associated data in bytes.
npub	Points to the public nonce for the packet which must be 8 bytes in length.
k	Points to the 16 bytes of the key to use to decrypt the packet.

Returns

0 on success, -1 if the authentication tag was incorrect, or some other negative number if there was an error in the parameters.

See Also

oribatida_192_aead_encrypt()

int oribatida_192_aead_encrypt	(	unsigned char *	c,
		unsigned long long *	clen,
		const unsigned char *	m,
		unsigned long long	mlen,
		const unsigned char *	ad,
		unsigned long long	adlen,
		const unsigned char *	nsec,
		const unsigned char *	npub,
		const unsigned char *	k
	)

Encrypts and authenticates a packet with Oribatida-192-96.

Parameters

c	Buffer to receive the output.
clen	On exit, set to the length of the output which includes the ciphertext and the 12 byte authentication tag.
m	Buffer that contains the plaintext message to encrypt.
mlen	Length of the plaintext message in bytes.
ad	Buffer that contains associated data to authenticate along with the packet but which does not need to be encrypted.
adlen	Length of the associated data in bytes.
nsec	Secret nonce - not used by this algorithm.
npub	Points to the public nonce for the packet which must be 8 bytes in length.
k	Points to the 16 bytes of the key to use to encrypt the packet.

Returns

0 on success, or a negative value if there was an error in the parameters.

See Also

oribatida_192_aead_decrypt()

int oribatida_256_aead_decrypt	(	unsigned char *	m,
		unsigned long long *	mlen,
		unsigned char *	nsec,
		const unsigned char *	c,
		unsigned long long	clen,
		const unsigned char *	ad,
		unsigned long long	adlen,
		const unsigned char *	npub,
		const unsigned char *	k
	)

Decrypts and authenticates a packet with Oribatida-256-64.

Parameters

m	Buffer to receive the plaintext message on output.
mlen	Receives the length of the plaintext message on output.
nsec	Secret nonce - not used by this algorithm.
c	Buffer that contains the ciphertext and authentication tag to decrypt.
clen	Length of the input data in bytes, which includes the ciphertext and the 16 byte authentication tag.
ad	Buffer that contains associated data to authenticate along with the packet but which does not need to be encrypted.
adlen	Length of the associated data in bytes.
npub	Points to the public nonce for the packet which must be 16 bytes in length.
k	Points to the 16 bytes of the key to use to decrypt the packet.

Returns

0 on success, -1 if the authentication tag was incorrect, or some other negative number if there was an error in the parameters.

See Also

oribatida_256_aead_encrypt()

int oribatida_256_aead_encrypt	(	unsigned char *	c,
		unsigned long long *	clen,
		const unsigned char *	m,
		unsigned long long	mlen,
		const unsigned char *	ad,
		unsigned long long	adlen,
		const unsigned char *	nsec,
		const unsigned char *	npub,
		const unsigned char *	k
	)

Encrypts and authenticates a packet with Oribatida-256-64.

Parameters

c	Buffer to receive the output.
clen	On exit, set to the length of the output which includes the ciphertext and the 16 byte authentication tag.
m	Buffer that contains the plaintext message to encrypt.
mlen	Length of the plaintext message in bytes.
ad	Buffer that contains associated data to authenticate along with the packet but which does not need to be encrypted.
adlen	Length of the associated data in bytes.
nsec	Secret nonce - not used by this algorithm.
npub	Points to the public nonce for the packet which must be 16 bytes in length.
k	Points to the 16 bytes of the key to use to encrypt the packet.

Returns

0 on success, or a negative value if there was an error in the parameters.

See Also

oribatida_256_aead_decrypt()