decode rsa in swift

Here's an example of how to decode RSA in Swift using the CryptoKit framework:

main.swift
import CryptoKit

func decryptRSA(_ encryptedData: Data, privateKey: RSA.PrivateKey) throws -> Data {
    let decryptedData = try RSA.decrypt(encryptedData, privateKey: privateKey)
    return decryptedData
}

// Example Usage
let encryptedData = Data(base64Encoded: "tEdbiYz/U+h...")!
let privateKey = try! RSA.PrivateKey(pemEncoded: "...")
let decryptedData = try! decryptRSA(encryptedData, privateKey: privateKey)
print(String(decoding: decryptedData, as: UTF8.self))
470 chars
13 lines

Note: The private key used for decryption must be generated from the corresponding public key used for encryption. The CryptoKit framework also supports key generation and conversion between various formats.

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