Objective-C bindings for NaCL.
MIT License. See LICENSE for more information.
Both NSString and NSData have been augmented with public-key encryption/decryption
methods via the NSString+Nacl and NSData+NACL categories.
NSString *plainText = @"I am about to get encrypted.";
NACLAsymmetricKeyPair *sendersKeyPair = [NACLAsymmetricKeyPair keyPair];
NACLAsymmetricKeyPair *receiversKeyPair = [NACLAsymmetricKeyPair keyPair];
NACLNonce *nonce = [NACLNonce nonce];
NSData *encryptedData;
encryptedData = [plainText encryptedDataUsingPublicKey:sendersKeyPair.publicKey
privateKey:receiversKeyPair.privateKey
nonce:nonce];
plainText = [encryptedData decryptedTextUsingPublicKey:receiversKeyPair.publicKey
privateKey:sendersKeyPair.privateKey];
The methods that perform public-key encryption pack the nonce data at the end of the encrypted data object. The methods that perform public-key decryption without an explicit nonce argument expect nonce data to be packed at the end of the receiver. The methods that perform public-key decryption with an explicit nonce argument expect nonce data to not be packed at the end of the receiver. This behavior is provided as a convenience so you don't have to maintain the nonce. Keep in mind that if you consume encrypted data on another platform (or any library other than SodiumObjc), you should remove the nonce.
NSData *encryptedData;
encryptedData = [[plainText encryptedDataUsingPublicKey:sendersKeyPair.publicKey
privateKey:receiversKeyPair.privateKey
nonce:nonce] dataWithoutNonce];
NSMutableURLRequest *request = ...
request.HTTPBody = encryptedData;
Both NSString and NSData have been augmented with secret-key encryption/decryption
methods via the NSString+Nacl and NSData+NACL categories, as well.
NSString *plainText = @"I am about to get encrypted.";
NACLSymmetricPrivateKey *privateKey = [NACLSymmetricPrivateKey privateKey];
NACLNonce *nonce = [NACLNonce nonce];
NSData *encryptedData;
encryptedData = [plainText encryptedDataUsingPrivateKey:privateKey nonce:nonce];
plainText = [encryptedData decryptedDataUsingPrivateKey:privateKey nonce:nonce];
The methods that perform private-key encryption also pack the nonce data at the end of the encrypted data object. The methods that perform private-key decryption without an explicit nonce argument expect nonce data to be packed at the end of the receiver. The methods that perform private-key decryption with an explicit nonce argument expect nonce data to not be packed at the end of the receiver. This behavior is provided as a convenience so you don't have to maintain the nonce. Keep in mind that if you consume encrypted data on another platform (or any library other than SodiumObjc), you should remove the nonce.
NSData *encryptedData;
encryptedData = [[plainText encryptedDataUsingPrivateKey:privateKey
nonce:nonce] dataWithoutNonce];
NSMutableURLRequest *request = ...
request.HTTPBody = encryptedData;
Both NSString and NSData have been augmented with signing methods via the
NSString+Nacl and NSData+NACL categories.
NSString *plainText = @"I am about to get encrypted.";
NACLSigningKeyPair *signingKeyPair = [NACLSigningKeyPair keyPair];
NACLNonce *nonce = [NACLNonce nonce];
NSData *signedData;
signedData = [plainText signedDataUsingPrivateKey:signingKeyPair.privateKey];
NSString *verifiedText;
verifiedText = [signedData verifiedTextUsingPublicKey:signingKeyPair.publicKeyPair];
Building libsodium consists of the following steps:
- Fetch the contents of the libsodium submodule
- Building libsodium for all involved architectures
- Copying the built archives and headers to the correct location
The steps that I use to do this are:
git submodule update --init --recursive
cd libsodium-darwin-build
make clean all
cp libsodium-ios.a ../lib/ios/
cp libsodium-osx.a ../lib/osx/
cp -R build/iPhoneOS-arm64/include ../lib/ios/
cp -R build/MacOSX-x86_64/include ../lib/osx/