Public Key from Certificate

src/core/config/Categories.json

@@ -180,7 +180,8 @@
             "RSA Encrypt",
             "RSA Decrypt",
             "Parse SSH Host Key",
-            "Parse CSR"
+            "Parse CSR",
+            "Public Key from Certificate"
         ]
     },
     {

src/core/operations/PubKeyFromCert.mjs

@@ -0,0 +1,68 @@
+/**
+ * @author cplussharp
+ * @copyright Crown Copyright 2023
+ * @license Apache-2.0
+ */
+
+import r from "jsrsasign";
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+
+/**
+ * Public Key from Certificate operation
+ */
+class PubKeyFromCert extends Operation {
+
+    /**
+     * PubKeyFromCert constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Public Key from Certificate";
+        this.module = "PublicKey";
+        this.description = "Extracts the Public Key from a Certificate.";
+        this.infoURL = "https://en.wikipedia.org/wiki/X.509";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [];
+        this.checks = [];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        let output = "";
+        let match;
+        const regex = /-----BEGIN CERTIFICATE-----/g;
+        while ((match = regex.exec(input)) !== null) {
+            // find corresponding end tag
+            const indexBase64 = match.index + match[0].length;
+            const footer = "-----END CERTIFICATE-----";
+            const indexFooter = input.indexOf(footer, indexBase64);
+            if (indexFooter === -1) {
+                throw new OperationError(`PEM footer '${footer}' not found`);
+            }
+
+            const certPem = input.substring(match.index, indexFooter + footer.length);
+            const cert = new r.X509();
+            cert.readCertPEM(certPem);
+            let pubKey;
+            try {
+                pubKey = cert.getPublicKey();
+            } catch {
+                throw new OperationError("Unsupported public key type");
+            }
+            const pubKeyPem = r.KEYUTIL.getPEM(pubKey);
+
+            // PEM ends with '\n', so a new key always starts on a new line
+            output += pubKeyPem;
+        }
+        return output;
+    }
+}
+
+export default PubKeyFromCert;

tests/operations/index.mjs

@@ -120,6 +120,7 @@ import "./tests/PGP.mjs";
 import "./tests/PHP.mjs";
 import "./tests/PowerSet.mjs";
 import "./tests/Protobuf.mjs";
+import "./tests/PubKeyFromCert.mjs";
 import "./tests/Rabbit.mjs";
 import "./tests/RAKE.mjs";
 import "./tests/Regex.mjs";

tests/operations/tests/PubKeyFromCert.mjs

@@ -0,0 +1,215 @@
+/**
+ * Public Key from Certificate
+ *
+ * @author cplussharp
+ * @copyright Crown Copyright 2023
+ * @license Apache-2.0
+ */
+import TestRegister from "../../lib/TestRegister.mjs";
+
+const RSA_CERT = `-----BEGIN CERTIFICATE-----
+MIIBfTCCASegAwIBAgIUeisK5Nwss2DGg5PCs4uSxxXyyNkwDQYJKoZIhvcNAQEL
+BQAwEzERMA8GA1UEAwwIUlNBIHRlc3QwHhcNMjExMTE5MTcyMDI2WhcNMzExMTE3
+MTcyMDI2WjATMREwDwYDVQQDDAhSU0EgdGVzdDBcMA0GCSqGSIb3DQEBAQUAA0sA
+MEgCQQDyq9A6emHSLczn5Omu5muy+AReC53pTGCrW6Bi65OoobahT2RUSzXCYuvB
+757fLLTKz+dLeo6sFkNhIzHZI+n7AgMBAAGjUzBRMB0GA1UdDgQWBBRO+jvkqq5p
+pnQgwMMnRoun6e7eiTAfBgNVHSMEGDAWgBRO+jvkqq5ppnQgwMMnRoun6e7eiTAP
+BgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBCwUAA0EAR/5HAZM5qBhU/ezDUIFx
+gmUGoFbIb5kJD41YCnaSdrgWglh4He4melSs42G/oxBBjuCJ0bUpqWnLl+lJkv1z
+IA==
+-----END CERTIFICATE-----`;
+
+const RSA_PUBKEY = `-----BEGIN PUBLIC KEY-----
+MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAPKr0Dp6YdItzOfk6a7ma7L4BF4LnelM
+YKtboGLrk6ihtqFPZFRLNcJi68Hvnt8stMrP50t6jqwWQ2EjMdkj6fsCAwEAAQ==
+-----END PUBLIC KEY-----`;
+
+const EC_P256_CERT = `-----BEGIN CERTIFICATE-----
+MIIBfzCCASWgAwIBAgIUK4H8J3Hr7NpRLPrACj8Pje4JJJ0wCgYIKoZIzj0EAwIw
+FTETMBEGA1UEAwwKUC0yNTYgdGVzdDAeFw0yMTExMTkxNzE5NDVaFw0zMTExMTcx
+NzE5NDVaMBUxEzARBgNVBAMMClAtMjU2IHRlc3QwWTATBgcqhkjOPQIBBggqhkjO
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+ac2iDHmbdpWzcXI+xLKNYAIhAIRR1LRSHVwOTLQ/iBXd+8LCkm5aTB27RW46LN80
+ylxt
+-----END CERTIFICATE-----`;
+
+const EC_P256_PUBKEY = `-----BEGIN PUBLIC KEY-----
+MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEDUc8A0EDNKoCYIPWMHz1yUzqE5mJ
+gusgcAE8H6810fkJ8ZmTNiCCa6sLgR2vD1VNh2diirWgKPH4PVMKav5e6Q==
+-----END PUBLIC KEY-----`;
+
+const DSA_CERT = `-----BEGIN CERTIFICATE-----
+MIIEXzCCBA2gAwIBAgIUYYcPJB8UQLzUnqkGJvs3J4RI0OgwCwYJYIZIAWUDBAMC
+MBMxETAPBgNVBAMMCERTQSBUZXN0MB4XDTIzMTAxNTAwMjEzNVoXDTMzMTAxMjAw
+MjEzNVowEzERMA8GA1UEAwwIRFNBIFRlc3QwggNCMIICNQYHKoZIzjgEATCCAigC
+ggEBALoLV+uz7vMYZCIuwXNkgZawvDgZAG1T7IiG030WgqesRNncuoUQOmAJCiuN
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+nikFAoIBADXOTpBw0WA+UihxDG+6qqM05kxVMYmz6IRZ/06ffZSGVFN6Bx1i0s3v
+kzM5V8GsKpkKkSk7V8fTQnAIIlMmt1Y7ff+ng7+TfYotMrvvEYlolYK06J2WWoUA
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+3ds9eL+oC+HPFlfUNfUiU30aDA==
+-----END CERTIFICATE-----`;
+
+const DSA_PUBKEY = `-----BEGIN PUBLIC KEY-----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+BQACggEAaTfsNDdG+SCALKV55SfcrgejkZN4/+a2fg1LU81tWACSOsY03BULzexa
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+Iejrq62RYvYGPqgOXIk/ZEF8qx7nVV7veejQ66KEcZr+iSFRb06GjYsHtr3IHZAC
+8PB1GyxWKH+EgBPY4FPBKcU6dNnvB871UlWuso9Z5xoacyz5RKhfE2b7PaU4NpCJ
+N/871qIzCaD8kwC32042wHohTDHijSvwijjiY9twFQGcaTEkenFG6yHEXSg54Qk1
+ZJMV1HnACFLOjJNdJEn5LohpfS4yow==
+-----END PUBLIC KEY-----`;
+
+const ED25519_CERT = `-----BEGIN CERTIFICATE-----
+MIIBQjCB9aADAgECAhRjPJhrdNco5LzpsIs0vSLLaZaZ0DAFBgMrZXAwFzEVMBMG
+A1UEAwwMRWQyNTUxOSBUZXN0MB4XDTIzMTAxNTAwMjMwOFoXDTMzMTAxMjAwMjMw
+OFowFzEVMBMGA1UEAwwMRWQyNTUxOSBUZXN0MCowBQYDK2VwAyEAELP6AflXwsuZ
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+4mwAwzr9dQx2xzAfBgNVHSMEGDAWgBRfxS9q0IemWxkH4mwAwzr9dQx2xzAPBgNV
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+lllkpkclM9LH5dLrw4ArdTjS9zAjzY/02WkphHhICHXt3KqZTwI=
+-----END CERTIFICATE-----`;
+
+/*
+const ED25519_PUBKEY = `-----BEGIN PUBLIC KEY-----
+MCowBQYDK2VwAyEAELP6AflXwsuZ5q4NDIO0LP2iCdKRvds4nwsUmRhOw3g=
+-----END PUBLIC KEY-----`;
+*/
+
+const ED448_CERT = `-----BEGIN CERTIFICATE-----
+MIIBijCCAQqgAwIBAgIUZaCS7zEjOnQ7O4KUFym6fJF5vl8wBQYDK2VxMBUxEzAR
+BgNVBAMMCkVkNDQ4IFRlc3QwHhcNMjMxMDE1MDAyMzI1WhcNMzMxMDEyMDAyMzI1
+WjAVMRMwEQYDVQQDDApFZDQ0OCBUZXN0MEMwBQYDK2VxAzoAVN8kG0TMVyGOu/Ov
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+UTAdBgNVHQ4EFgQUJFrepAf9YXrmDMSAzrMeYQmosd0wHwYDVR0jBBgwFoAUJFre
+pAf9YXrmDMSAzrMeYQmosd0wDwYDVR0TAQH/BAUwAwEB/zAFBgMrZXEDcwA+YiZj
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+rWzZowcOjnWKhXm7JgA=
+-----END CERTIFICATE-----`;
+
+/*
+const ED448_PUBKEY = `-----BEGIN PUBLIC KEY-----
+MEMwBQYDK2VxAzoAVN8kG0TMVyGOu/OvBTe8H0Wi4HJrQAlSv4XLwJbkuoi4EeRl
+EHQwXsNYLZTtY2Jra6AWhbVYYaEA
+-----END PUBLIC KEY-----`
+*/
+
+TestRegister.addTests([
+    {
+        name: "Public Key from Certificate: Missing footer",
+        input: RSA_CERT.substring(0, RSA_CERT.length / 2),
+        expectedOutput: "PEM footer '-----END CERTIFICATE-----' not found",
+        recipeConfig: [
+            {
+                op: "Public Key from Certificate",
+                args: [],
+            }
+        ],
+    },
+
+    // test RSA certificate
+    {
+        name: "Public Key from Certificate: RSA",
+        input: RSA_CERT,
+        expectedOutput: (RSA_PUBKEY + "\n").replace(/\r/g, "").replace(/\n/g, "\r\n"),
+        recipeConfig: [
+            {
+                op: "Public Key from Certificate",
+                args: [],
+            }
+        ],
+    },
+
+    // test EC certificate
+    {
+        name: "Public Key from Certificate: EC",
+        input: EC_P256_CERT,
+        expectedOutput: (EC_P256_PUBKEY + "\n").replace(/\r/g, "").replace(/\n/g, "\r\n"),
+        recipeConfig: [
+            {
+                op: "Public Key from Certificate",
+                args: [],
+            }
+        ],
+    },
+
+    // test DSA certificate
+    {
+        name: "Public Key from Certificate: DSA",
+        input: DSA_CERT,
+        expectedOutput: (DSA_PUBKEY + "\n").replace(/\r/g, "").replace(/\n/g, "\r\n"),
+        recipeConfig: [
+            {
+                op: "Public Key from Certificate",
+                args: [],
+            }
+        ],
+    },
+
+    // test EdDSA certificates
+    {
+        name: "Public Key from Certificate: Ed25519",
+        input: ED25519_CERT,
+        expectedOutput: "Unsupported public key type",
+        recipeConfig: [
+            {
+                op: "Public Key from Certificate",
+                args: [],
+            }
+        ],
+    },
+    {
+        name: "Public Key from Certificate: Ed448",
+        input: ED448_CERT,
+        expectedOutput: "Unsupported public key type",
+        recipeConfig: [
+            {
+                op: "Public Key from Certificate",
+                args: [],
+            }
+        ],
+    },
+
+    // test multi-input
+    {
+        name: "Public Key from Certificate: Multiple certificates",
+        input: RSA_CERT + "\n" + EC_P256_CERT,
+        expectedOutput: (RSA_PUBKEY + "\n" + EC_P256_PUBKEY + "\n").replace(/\r/g, "").replace(/\n/g, "\r\n"),
+        recipeConfig: [
+            {
+                op: "Public Key from Certificate",
+                args: [],
+            }
+        ],
+    }
+]);