NACrypto

You should be using NAChloride (libsodium/NaCl) instead. This is for advanced crypto only.

The following use Apple's CommonCrypto framework:

• HMAC: SHA1, SHA2
• Digest: SHA2
• AES (256-CTR)

The following are implemented from included reference C libraries:

• HMAC: SHA3/Keccak
• Digest: SHA3/Keccak
• TwoFish (CTR)

Podfile

pod "NACrypto"

HMAC (SHA1, SHA2, SHA3)

NSData *mac1 = [NAHMAC HMACForKey:key data:data algorithm:NAHMACAlgorithmSHA2_512];
NSData *mac2 = [NAHMAC HMACForKey:key data:data algorithm:NAHMACAlgorithmSHA3_512];

AES (256-CTR)

// Nonce should be 16 bytes
// Key should be 32 bytes
NAAES *AES = [[NAAES alloc] initWithAlgorithm:NAAESAlgorithm256CTR];
NSData *encrypted = [AES encrypt:message nonce:nonce key:key error:&error];

TwoFish (CTR)

// Nonce should be 16 bytes
// Key should be 32 bytes
NATwoFish *twoFish = [[NATwoFish alloc] init];
NSData *encrypted = [twoFish encrypt:message nonce:nonce key:key error:&error];

Digest (SHA2, SHA3)

NSData *digest1 = [NADigest digestForData:data algorithm:NADigestAlgorithmSHA2_256];
NSData *digest2 = [NADigest digestForData:data algorithm:NADigestAlgorithmSHA3_512];

// Directly use SHA3
NSData *sha = [NASHA3 SHA3ForData:data digestBitLength:512];

Keychain Utils

NSData *key = [NASecRandom randomData:32 error:&error];
[NAKeychain addSymmetricKey:key applicationLabel:@"NACrypto" tag:nil label:nil];
NSData *keyOut = [NAKeychain symmetricKeyWithApplicationLabel:@"NACrypto"];

NSData Utils

NSData *data = [@"deadbeef" na_dataFromHexString];
[data na_hexString]; // @"deadbeef";