如何使用ios中的RSA公钥加密和解密字符串(纯文本)

我想Encrypt用我的RSA公钥输入一个字符串(纯文本)。我有一个public

key,作为从服务器发送来的,String并创建了一个RSA公共密钥。现在我想使用该键Encrypt填充文本PKACS12。我怎样才能做到这一点。我经历了很多堆栈溢出问题,但没有获得任何成功。

我这是怎么创建RSA public key

let serverPublicKey = "Some text with key"

let data2 = Data.init(base64Encoded: serverPublicKey)

let keyDict:[NSObject:NSObject] = [

kSecAttrKeyType: kSecAttrKeyTypeRSA,

kSecAttrKeyClass: kSecAttrKeyClassPublic,

kSecAttrKeySizeInBits: NSNumber(value: 2048),

kSecReturnPersistentRef: true as NSObject

]

let publickeysi = SecKeyCreateWithData(data2! as CFData, keyDict as CFDictionary, nil)

这将创建一个RSA public key成功。现在我想用这个密钥来加密另一个Plain Text。我怎样才能做到这一点。

回答:

希望这个能对您有所帮助:

let serverPublicKey = "Some text with key"

let data2 = Data.init(base64Encoded: serverPublicKey)

let keyDict:[NSObject:NSObject] = [

kSecAttrKeyType: kSecAttrKeyTypeRSA,

kSecAttrKeyClass: kSecAttrKeyClassPublic,

kSecAttrKeySizeInBits: NSNumber(value: 2048),

kSecReturnPersistentRef: true as NSObject

]

let publickeysi = SecKeyCreateWithData(data2! as CFData, keyDict as CFDictionary, nil)

//Encrypt a string with the public key

let message = "This is my message."

let blockSize = SecKeyGetBlockSize(publickeysi!)

var messageEncrypted = [UInt8](repeating: 0, count: blockSize)

var messageEncryptedSize = blockSize

var status: OSStatus!

status = SecKeyEncrypt(publickeysi!, SecPadding.PKCS1, message, message.characters.count, &messageEncrypted, &messageEncryptedSize)

if status != noErr {

print("Encryption Error!")

return

}

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