Objective-C CommonCrypto: Encrypt Message Example.m

+(NSString *)encryptRSA:(NSString *)plainTextString key:(SecKeyRef)publicKey {
	size_t cipherBufferSize = SecKeyGetBlockSize(publicKey); 
	uint8_t *cipherBuffer = malloc(cipherBufferSize); 
	uint8_t *nonce = (uint8_t *)[plainTextString UTF8String]; 
	SecKeyEncrypt(publicKey,
		kSecPaddingOAEP, 
		nonce, 
		strlen( (char*)nonce ), 
		&cipherBuffer[0], 
		&cipherBufferSize);
	NSData *encryptedData = [NSData dataWithBytes:cipherBuffer length:cipherBufferSize]; 
	return [encryptedData base64EncodedString];
}