diff --git a/scripts/rsa.js b/scripts/rsa.js
new file mode 100644
index 0000000..800191e
--- /dev/null
+++ b/scripts/rsa.js
@@ -0,0 +1,49 @@
+const readline = require('readline');
+const fs = require('fs');
+const path = require('path');
+
+// this function will transform RSA private or public key to one line
+// USAGE:
+// => node ./scripts/rsa.js private_key.key
+function main() {
+    const args = process.argv;
+    if (args.length <= 2) {
+        console.log('required pem file argument');
+        process.exit(1);
+    }
+
+    const pemFileArg = args[2];
+    const cwd = process.cwd();
+    const pemPath = path.join(cwd, pemFileArg);
+
+    if (!fs.existsSync(pemPath)) {
+        console.log('pem file does not exist');
+        process.exit(1);
+    }
+
+    const pemOut = path.join(cwd, `${pemFileArg}.oneline.txt`);
+
+    try {
+        const outStream = fs.createWriteStream(pemOut);
+        const rl = readline.createInterface({
+            input: fs.createReadStream(pemPath)
+        });
+
+        rl.on('line', (line) => {
+            outStream.write(line);
+            outStream.write('\\n');
+        });
+
+        rl.on('close', () => {
+            outStream.end();
+        });
+
+        
+
+    } catch(err) {
+        console.log(err);
+        process.exit(1);
+    }
+}
+
+main();
\ No newline at end of file
diff --git a/testdata/private_key.key b/testdata/private_key.key
index 48eb042..3c5f904 100644
--- a/testdata/private_key.key
+++ b/testdata/private_key.key
@@ -1,28 +1 @@
------BEGIN PRIVATE KEY-----
-MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCdf18mK2yOJmzT
-nY7+WHXR62osAuLAqgk5n8hL0l3CA51dRJIIhqTEH5pUGMKPvTEGYOyd/Ay4Fw67
-t/V+R/zs7mFmhXKHxr1zVf33r1f4N6nBaSGv3lIjBwNu9x+sNvOjh5KbkYsDWlWW
-voK9N5phhXoq69kg6t/dAJ9XVAeCl9OerHJctbffwjcC/nv2v2HTjQYVfaMERuiZ
-+/O5jRlcHfKJAkCjVcCeXtCoThSBnpgkKD2+uQUCLS/1n7ALMpAr1Es+710dqHZU
-xgGRI1Cu9a5sHns1EQgU7Vt10WZe4x0WFAhGLIGzdI2BdagseaRuUFrnRpStzTAy
-IIAzJ/47AgMBAAECggEAaDYzWyo4dgZu08bZKuqVawT+B4kRSLI50GstOR5E8284
-3NHWXtXYh/zxPNv1QO7KVZIkfpScReLb2NHsGla/wHYq9I8wLS8PhBVOKmlXJ+KM
-7HEH3TqZ1pt5Zh8WUfk6VOYL1+wBs4I+R7RfBZyZBhYvs97CmMlQvwb+Z+Yt4fZS
-OI0kUPLEbVMOCw5yuKK0tTgCX3bEt0gWneXYeXXfJXUqBthFFHQOuI/IUl0OyK5F
-r5lowqZqO82WnxxsRNnHSp2xetbD7rGHgbuR2uvj2Q4Gjvob7pOAg0cYjYU8e5P1
-bjJrzi1rlgB6ao+NNGZZbRYf7ARWdHamCy/F6GW9wQKBgQDOWjajLih4Oxnjvpne
-oRfpl88tmGe4JGa9nVDzgNP/XCCw5K0Fhp9pBpyDD0r8bkaBW678XvS/wPLtDmZa
-E5NMuXo8VxuEom2fhHNPkgj9LJq3KMDmA16napjh9b2zHMQACAQSTS8ztZfwIEgR
-o3dQraT5xMNP8MfXjs5VJKF+kwKBgQDDZA8/kooBX1Rnlh5OF1oUFirZvkb8hpYO
-SL/uukePxGjAKn6UXniAdw/26+OoLpCbaYbg6QpB43ULyKxK7pbnO0EfB+Ta4aKo
-OkLaSn4CJze2XaThTFY3oZ5jOoXiz+vdcxWLqJmYf1ZXv1bd5axceDNX3Y7lSR3X
-w+XL/EwiuQKBgQCuMTNsPrvE+scZHL3RVJXWB+PJbp0nsfrU1+cNF1RefUvPZ8qz
-HniU9RLMA+3d980mx9mIizP6ZwvqlzxJj7rJis0oALRnG6KEhQ++PN2/spaMRSfJ
-Q1D07KRQItzXRVIjYKDnPia5dPLkrquH0EEZZuwcOEBTzEM2sQN2lmyJZwKBgBxw
-fPOw3Ztzh7KIHCMbrQXNcDE/S8/HuyGbHyydOntHiEOoK8Jmub1hFxbGoN1C4dNt
-Ga+028RZWhj7/W/uqFJBwqnEmV/uhaFc0Yw6WXrwwGAv4ybT2JzCTm58/y3TO66A
-6LrqMGkM58Ff3UHxAxR2fmqkmf7vlINqRRFayK4pAoGAfuNNgfQS1mzkDtDS3Xxm
-tM6+k1Pub+voSqers9lynzmwYnfdTVgNolxFfhdCUa/FdttwVgM5EP3W6M8iT4Bo
-mKdVf9GaKyHFAyLUPEYyJeIc1oSpx5EgbNTkAiMGqnJ3lCy8eatdSx7Uxa/A4Wk0
-tR6Njv4HJMbhYxvnsNTyWdQ=
------END PRIVATE KEY-----
+-----BEGIN PRIVATE KEY-----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\ntR6Njv4HJMbhYxvnsNTyWdQ=\n-----END PRIVATE KEY-----\n
\ No newline at end of file
diff --git a/testdata/public_key.key b/testdata/public_key.key
index 9b6a0e4..86e15d9 100644
--- a/testdata/public_key.key
+++ b/testdata/public_key.key
@@ -1,9 +1 @@
------BEGIN PUBLIC KEY-----
-MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnX9fJitsjiZs052O/lh1
-0etqLALiwKoJOZ/IS9JdwgOdXUSSCIakxB+aVBjCj70xBmDsnfwMuBcOu7f1fkf8
-7O5hZoVyh8a9c1X9969X+DepwWkhr95SIwcDbvcfrDbzo4eSm5GLA1pVlr6CvTea
-YYV6KuvZIOrf3QCfV1QHgpfTnqxyXLW338I3Av579r9h040GFX2jBEbomfvzuY0Z
-XB3yiQJAo1XAnl7QqE4UgZ6YJCg9vrkFAi0v9Z+wCzKQK9RLPu9dHah2VMYBkSNQ
-rvWubB57NREIFO1bddFmXuMdFhQIRiyBs3SNgXWoLHmkblBa50aUrc0wMiCAMyf+
-OwIDAQAB
------END PUBLIC KEY-----
+-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnX9fJitsjiZs052O/lh1\n0etqLALiwKoJOZ/IS9JdwgOdXUSSCIakxB+aVBjCj70xBmDsnfwMuBcOu7f1fkf8\n7O5hZoVyh8a9c1X9969X+DepwWkhr95SIwcDbvcfrDbzo4eSm5GLA1pVlr6CvTea\nYYV6KuvZIOrf3QCfV1QHgpfTnqxyXLW338I3Av579r9h040GFX2jBEbomfvzuY0Z\nXB3yiQJAo1XAnl7QqE4UgZ6YJCg9vrkFAi0v9Z+wCzKQK9RLPu9dHah2VMYBkSNQ\nrvWubB57NREIFO1bddFmXuMdFhQIRiyBs3SNgXWoLHmkblBa50aUrc0wMiCAMyf+\nOwIDAQAB\n-----END PUBLIC KEY-----\n
\ No newline at end of file