데이터 암호화(HTML)
[ 이 문서는 Windows 런타임 앱을 작성하는 Windows에서 8.x 및 Windows Phone 8.x 개발자를 대상으로 합니다. Windows 10용으로 개발하는 경우에는 최신 설명서를 참조하세요.]
다음 예제에서는 encrypt 메서드를 사용하여 데이터를 암호화하는 방법을 보여 줍니다.
function encryptDataBuffer(keyMaterial, stringToEncrypt, algNameString, keysize, ivBuffer) {
// Input arguments:
// keyMaterial.......Buffer that contains random key material (see the GenerateRandom method)
// stringToEncrypt...String that contains information to be encrypted
// algNameString.....String that contains the name of the symmetric algrorithm to use
// keysize...........Requested key size
// ivBuffer..........Buffer that contains the initialization buffer (this can be random data or custom defined)
var encryptedBuffer;
try {
// Convert the input string to binary.
var inputDataBuffer = Windows.Security.Cryptography.CryptographicBuffer.convertStringToBinary(stringToEncrypt, Windows.Security.Cryptography.BinaryStringEncoding.utf8);
// Open the algorithm provider for the algorithm specified on input.
var algorithmProvider = Windows.Security.Cryptography.Core.SymmetricKeyAlgorithmProvider.openAlgorithm(algNameString);
// Check that the requested key size specified on input does not exceed the maximum size supported by the algorithm.
if (keysize > algorithmProvider.supportedKeyLengths.max) {
// Handle error.
}
// Create a symmetric key.
var symmetricKey = algorithmProvider.createSymmetricKey(keyMaterial);
// Check the padding scheme and determine whether the data must be aligned.
if (algorithmProvider.padding != Windows.Security.Cryptography.Core.CryptographicPadding.block) {
// Data must be aligned by block size.
var i = inputDataBuffer.length % algorithmProvider.blockLength;
if (i > 0) {
// Handle error.
}
}
// Encrypt the input data.
encryptedBuffer = Windows.Security.Cryptography.Core.CryptographicEngine.encrypt(symmetricKey, inputDataBuffer, ivBuffer);
}
catch (e) {
// Handle error.
}
return encryptedBuffer;
}