Question 1

How do I encrypt a string with SwiftyRSA?

Accepted Answer

Create a ClearMessage from the string, then use a PublicKey to encrypt it with padding like .PKCS1, as shown in the quick start example. This returns an EncryptedMessage with data or base64 representation for easy handling.

Question 2

SwiftyRSA vs CommonCrypto for RSA in Swift?

Accepted Answer

SwiftyRSA provides a higher-level, Swifty API that simplifies keychain interactions and key management, whereas CommonCrypto requires more low-level code and manual handling of security framework details. SwiftyRSA is better for ease of use, but CommonCrypto offers more direct control.

Question 3

Can SwiftyRSA be used on Linux with Swift?

Accepted Answer

No, SwiftyRSA relies on Apple's Security framework, which is only available on iOS and macOS. It is not compatible with server-side Swift on Linux or other non-Apple platforms.

Question 4

How to sign data with a private key in SwiftyRSA?

Accepted Answer

Create a ClearMessage from your data, then call the signed method with a PrivateKey and a digest type like .sha1. This returns a Signature object that can be base64 encoded or used for verification, as demonstrated in the advanced usage section.

Question 5

Is SwiftyRSA secure for production use?

Accepted Answer

Yes, SwiftyRSA is used in production apps like Scoop and abstracts Apple's well-vetted Security framework. However, ensure you follow best practices for key management, use appropriate key sizes, and stay updated with library releases.

Question 6

What's the performance impact of using SwiftyRSA?

Accepted Answer

RSA operations are inherently slow for large data, and SwiftyRSA adds overhead for keychain management. It's best suited for encrypting small payloads like keys or signatures, not for bulk data encryption in performance-critical applications.

SwiftyRSA

What is SwiftyRSA?

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