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Swift 2 Examples

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(Swift 2) Create a Hash Signature for Value Added Tax Audit SOAP Message for Angola

Demonstrates how to create a hash signature that is required in Value Added Tax Audit Files in Angola, Africa.

It is the following two instructions that should be used to create a hash value to be put into a <hash></hash> field in SOAP XML file containing the tax data for the VAT authorities:

openssl dgst -shal -sign private.pem -outRegisto1.shal Registo1.txt

then

openssl enc -base64 - in Registo1.shal -out Registo1.b64 -A

Chilkat Downloads for the Swift Programming Language

MAC OS X (Cocoa) Objective-C/Swift Libs

iOS Objective-C/Swift Libs

func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let pkey = CkoPrivateKey()

    // Load the private key from an PEM file.
    // Provide the password in the 2nd argument.
    // If no password is needed, just pass an empty string.
    var success: Bool = pkey.LoadAnyFormatFile("qa_data/rsa/rsaPrivKey_secret.pem", password: "secret")
    if success != true {
        print("\(pkey.LastErrorText)")
        return
    }

    // Assuming this is an RSA private key..
    let rsa = CkoRsa()

    // Import the private key into the RSA object:
    success = rsa.ImportPrivateKeyObj(pkey)
    if success != true {
        print("\(rsa.LastErrorText)")
        return
    }

    // OpenSSL uses big-endian.
    rsa.LittleEndian = false

    // SHA1 hash and sign, and return base64.
    rsa.EncodingMode = "base64"
    var b64sig: String? = rsa.SignStringENC("2018-05-18,2018-05-18T11:22:19;FAC 001/18;53.00;", hashAlg: "sha1")
    print("\(b64sig!)")

    // The signature is equal in size to your private key.  For example, if you have a 1024-bit RSA key,
    // then 1024 bits = 128 bytes.   When 128 bytes is base64 encoded, the result is a string approximately
    // 4/3rds the size of the original.  128 * 4 / 3 = (approximately) 172 bytes.

    // If your RSA key is 2048-bits, then your signature will be twice as long.

}

 

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