Javascript中的RSA-OAEP加密和Java中的解密

Question

我目前正在Javascript上实现RSA-OAEP加密，并在Java上实现解密。

我的javascript代码有以下内容

function stringToArrayBuffer(str){
        var buf = new ArrayBuffer(str.length);
        var bufView = new Uint8Array(buf);
        for (var i=0, strLen=str.length; i<strLen; i++) {
            bufView[i] = str.charCodeAt(i);
        }
        return buf;
}

function arrayBufferToString(str){
    var byteArray = new Uint8Array(str);
    var byteString = '';
    for(var i=0; i < byteArray.byteLength; i++) {
        byteString += String.fromCodePoint(byteArray[i]);
    }
    return byteString;
}

function encryptDataWithPublicKey(data, key) {
    data = stringToArrayBuffer(data);
    return window.crypto.subtle.encrypt(
        {
            name: "RSA-OAEP",
            //label: Uint8Array([...]) //optional
        },
        key, //from generateKey or importKey above
        data //ArrayBuffer of data you want to encrypt
    );
}

var pem = Config.encryption.publicKey;

// fetch the part of the PEM string between header and footer
const pemHeader = "-----BEGIN PUBLIC KEY-----";
const pemFooter = "-----END PUBLIC KEY-----";
const pemContents = pem.substring(pemHeader.length, pem.length - pemFooter.length);               
// base64 decode the string to get the binary data
const binaryDerString = window.atob(pemContents);
// convert from a binary string to an ArrayBuffer
const binaryDer = stringToArrayBuffer(binaryDerString);
        
window.crypto.subtle.importKey(
                        "spki",
                        binaryDer,
                        {
                            name: "RSA-OAEP",
                            hash: { name: "SHA-256" }
                        },
                        true,
                        ["encrypt"]
                    ).then(function (publicKey) {
                        encryptDataWithPublicKey(text, publicKey).then((result) => {
                            var rdata = arrayBufferToString(result);
                            resolve(rdata);
                        });
                    }).catch(function (err) {
                        console.log(err);
                        reject(err);
                    });

我还有一个Java函数来解密文本。假设“rsoaepciphertext”是字符串文本。

Cipher cipher = Cipher.getInstance("RSA/ECB/OAEPPadding");
OAEPParameterSpec oaepParams = new OAEPParameterSpec("SHA-256", "MGF1", new MGF1ParameterSpec("SHA-256"), PSource.PSpecified.DEFAULT);
cipher.init(Cipher.DECRYPT_MODE, getPrivateKey(), oaepParams);
return new String(cipher.doFinal(Base64.decodeBase64(rsaOaepCipherText)), "UTF-8");

然而，我在Java上不断遇到解密错误，目前仍停留在这一部分，我在Javascript上的加密是否有任何错误？

Answer 1

好的，找到了。在发送到后端之前，我忘记在字符串中包含btoa。

应该是这样的

encryptDataWithPublicKey(text, publicKey).then((result) => {
   var rdata = arrayBufferToString(result);
   var rResult = window.btoa(rdata);
   resolve(rResult);
});