从字符串创建 RSA 公钥会引发异常

Question

我已经使用 open ssl 命令生成了这个测试公钥，并且我正在尝试使用 KeyFactory 将其转换为公钥。无论我尝试什么，它都会不断地给我一个 InvalidKeySpecException 。任何建议都将不胜感激。

 private void prepKeys() {
         String AppKeyPub = "MIIFKzCCA5OgAwIBAgIUGRbwEi8QEl2q+5h9wQ8P5guIMuEwDQYJKoZIhvcNAQEL"
+"BQAwgaQxCzAJBgNVBAYTAlNHMRIwEAYDVQQIDAlTaW5nYXBvcmUxEjAQBgNVBAcM"
+"CVNpbmdhcG9yZTEVMBMGA1UECgwMVGVzdCBwdnQgbHRkMRMwEQYDVQQLDApUZXN0"
+"dW5pdCAyMQ4wDAYDVQQDDAVUZXN0MjExMC8GCSqGSIb3DQEJARYidmFyYWxha3No"
+"bWlfcnVwcGFfbmVAc2cuc21iYy5jby5qcDAeFw0yNDEyMTYwNzU3NTRaFw0yNTEy"
+"MTEwNzU3NTRaMIGkMQswCQYDVQQGEwJTRzESMBAGA1UECAwJU2luZ2Fwb3JlMRIw"
+"EAYDVQQHDAlTaW5nYXBvcmUxFTATBgNVBAoMDFRlc3QgcHZ0IGx0ZDETMBEGA1UE"
+"CwwKVGVzdHVuaXQgMjEOMAwGA1UEAwwFVGVzdDIxMTAvBgkqhkiG9w0BCQEWInZh"
+"cmFsYWtzaG1pX3J1cHBhX25lQHNnLnNtYmMuY28uanAwggGiMA0GCSqGSIb3DQEB"
+"AQUAA4IBjwAwggGKAoIBgQCsuZJJqsD7ewKufNjRZVnL06bkAZIx1gD/erX4M4pS"
+"2LsLp1o/7UbdffpWPpCSgzDB68LoJS8KZyKnJKrRYk41xIx23gXAxdC6siuHAQhg"
+"sFiwi8ibwOvbVrO1zZWlDFHd8YQyBJAjTCETeeIgMiOzsOC88UJTzCYXmjzXflBC"
+"8QMHRJStcR2WEsS8865nNHMpoR9J6ulE12DVV9Qt+oD7YgG9bKRHRNo72Ea+Cs2F"
+"s6zXHS5Yrcqf+dh1LCCmHvTRhwBWBwXcEoJlg8bAeAooxTw5nL5t4myWYqqKIdJd"
+"3x6MD+sa4J0PhGZPC78ztSPXCxRaHUGLUlKmZtd+y3xTCQoBRTMLrseXDRhd+RWD"
+"cL5msCE9rQ7hTUZaa5t+hMLWjVXEAX5v53kupLRejQKwcCCGJlhWBSJ/lZUBAJ6K"
+"i2WdRkYTrhTvFpWQz20+bUwf2dqKRSUElL4b/MdRLYyimxkIS/JLoygENCSxqAo6"
+"Cuu+yWstRibeJvPEXXdQe0ECAwEAAaNTMFEwHQYDVR0OBBYEFMccKlW0OXXTDWAG"
+"vMR1cjfDVh5HMB8GA1UdIwQYMBaAFMccKlW0OXXTDWAGvMR1cjfDVh5HMA8GA1Ud"
+"EwEB/wQFMAMBAf8wDQYJKoZIhvcNAQELBQADggGBAGShQg0l1UnLuUV1m14j/v0c"
+"umLcL3gpyGxsyBgCnC1LSxFgW8r/8E3V6VKNR+Ws6gm1oE+P8A2rh0V0+2IQqGli"
+"eYgIUzjaqVF3aCw8dorPPy4kP9kr3ToPxy8dqe+kTHl/Y25RwUOzjVDRGpIJ7FnE"
+"EBADtT+2m27T1wQZD3SAErK7Ix9HeUFvPHY1G3n/a3/3IQ3VY3hdWdUSvhzCA9mn"
+"nfQBqGTuO5o7OQT+yQFge+81Fr1qeCicxAw4wLm5gfEVrG7tjKO1QhYkRGKEiqkw"
+"j+7koa+DArl0KOIRSvjTpZuG0H6b72NAetQT6/95KovaTjAgwZ9ernCoH/mOD6DC"
+"+eh052mO/VlowXkzHOwmfqODP4xWkX79T37eUScYccO6alqFhqJaE9CWT6bQDcXu"
+"K9VS8WTu00cjgwZfa0gRmQn1Cbr4Q4JK04igp7OARCPMQuKDpIMjFAPQ+rev+X4T"
+"+h6GQoYNpO0sqk7JS5fOhjKvKKvF/SBWAk0RI0P2dg==";

        // create the key factory          
            try {
                KeyFactory kFactory = KeyFactory.getInstance("RSA");  
                // decode base64 of your key
                byte[] decoded = Base64.getDecoder().decode(AppKeyPub);
                // generate the public key
                X509EncodedKeySpec spec =  new X509EncodedKeySpec(decoded);
                PublicKey publicKey = (PublicKey) kFactory.generatePublic(spec);

            System.out.println("Public Key: " + publicKey);  

            } catch (Exception e) {
                // TODO Auto-generated catch block  
                e.printStackTrace(); 
            }

         }

the below given ssl commands used to generate keys,
# generate a private key with the correct length 
openssl genrsa -out private-key.pem 3072 
# generate corresponding public key 
openssl rsa -in private-key.pem -pubout -out public-key.pem 
# optional: create a self-signed certificate 
openssl req -new -x509 -key private-key.pem -out cert.pem -days 360

Answer 1

我猜你复制了错误的密钥（也许你复制了私钥）。 我使用您的 openssl 命令生成公钥 (public-key.pem)，然后复制您的代码并将公钥更改为我的。该代码运行良好。