Signs a document using the provided private key and certificate.

The signature parameters must be specified in the options parameter. These options must contain the following fields:

• DOCUMENT_SIGNATURE_FORMAT_KEY: A String indicating the signature format. Supported value is :
  • DOCUMENT_SIGNATURE_FORMAT_PKCS7 for PKCS#7 signature
• DOCUMENT_HASH_ALGORITHM_KEY: A String indicating the hashing algorithm. Supported values are:
  • DOCUMENT_HASH_ALGORITHM_SHA1 for SHA-1 algorithm
  • DOCUMENT_HASH_ALGORITHM_SHA256 for SHA-256 algorithm
  • DOCUMENT_HASH_ALGORITHM_SHA384 for SHA-384 algorithm
  • DOCUMENT_HASH_ALGORITHM_SHA512 for SHA-512 algorithm

Note: This options dictionary may evolve in the future to support additional parameters.

Example:

private let inputUIntData: [UInt8] = [0x49, 0x6E, 0x70, 0x75, 0x74, 0x20, 0x74, 0x65, 0x78, 0x74, 0x20, 0x66, 0x6F, 0x72, 0x20, 0x43, 0x61, 0x44, 0x45, 0x53, 0x20, 0x73, 0x69, 0x67, 0x6E, 0x20, 0x74, 0x65, 0x73, 0x74, 0x2E]
let inputData = Data(inputUIntData)
let options: [String: Any] = [
 DocumentProcessor.DOCUMENT_SIGNATURE_FORMAT_KEY : DocumentProcessor.DOCUMENT_SIGNATURE_FORMAT_PKCS7,
 DocumentProcessor.DOCUMENT_HASH_ALGORITHM_KEY : DocumentProcessor.DOCUMENT_HASH_ALGORITHM_SHA256
]
let signedDocument = OutputStream.toMemory()
DocumentProcessor.signDocument(
    documentStream: InputStream(data: inputData),
    privateKey: privateKey!,
    certificat: certificate!,
    options: options,
    signedDocumentStream: signedDocument
) { error in
    if error != nil {
        // an error occurred
    }
    else {
        // signature is successful
    }
}