}

  /**
   * Returns the RSA private key encoded in [PKCS #1][rfc_8017] [PEM format][rfc_7468].
   *
   * [rfc_8017]: https://tools.ietf.org/html/rfc8017
   * [rfc_7468]: https://tools.ietf.org/html/rfc7468
   */
  fun privateKeyPkcs1Pem(): String {
    check(keyPair.private is RSAPrivateKey) { "PKCS1 only supports RSA keys" }
    return buildString {
      append("-----BEGIN RSA PRIVATE KEY-----\n")

```

#### 3.2.2 Generate a private key with RSA

Use the following command to generate a private key with RSA:

```sh
openssl genrsa -out private.key 2048
```

A response similar to this one should be displayed:

```
Generating RSA private key, 2048 bit long modulus
............................................+++
...........+++

    // [x509_extensions]
    // subjectAltName=DNS:localhost.localdomain,DNS:localhost,IP:127.0.0.1
    //
    // $ openssl req -x509 -nodes -days 36500 -subj '/CN=localhost' -config ./cert.cnf \
    //     -newkey rsa:512 -out cert.pem
    val certificate =
      certificate(
        """
        -----BEGIN CERTIFICATE-----
        MIIBWDCCAQKgAwIBAgIJANS1EtICX2AZMA0GCSqGSIb3DQEBBQUAMBQxEjAQBgNV

        |-----END CERTIFICATE-----
        |-----BEGIN RSA PRIVATE KEY-----
        |sXPVYAsGD1wizrXX+wFaL3chtF1oG1Fx/jcsSsG6BA==
        |-----END RSA PRIVATE KEY-----
        |
        """.trimMargin(),
      )
      fail<Any>()
    } catch (expected: IllegalArgumentException) {
      assertThat(expected.message).isEqualTo("unexpected type: RSA PRIVATE KEY")
    }
  }

  @Test

		os.Remove(outputFileName)
	}
}

func generateKeys() {
	privatekey, err := rsa.GenerateKey(crand.Reader, 2048)
	if err != nil {
		fmt.Printf("error generating key: %s n", err)
		os.Exit(1)
	}

	// dump private key to file
	privateKeyBytes := x509.MarshalPKCS1PrivateKey(privatekey)
	privateKeyBlock := &pem.Block{
		Type:  "RSA PRIVATE KEY",
		Bytes: privateKeyBytes,
	}

Using `gotestjsonbuildtext=1` restores the 1.23 behavior.
This setting will be removed in a future release, Go 1.28 at the earliest.

Go 1.24 changed [`crypto/rsa`](/pkg/crypto/rsa) to require RSA keys to be at
least 1024 bits. This behavior can be controlled with the `rsa1024min` setting.
Using `rsa1024min=0` restores the Go 1.23 behavior.

        } else if ("des".equalsIgnoreCase(cipherAlgorism)) {
            inver = InvertibleCryptographer.createDesCipher(fessConfig.getAppCipherKey());
        } else if ("rsa".equalsIgnoreCase(cipherAlgorism)) {
            inver = InvertibleCryptographer.createRsaCipher(fessConfig.getAppCipherKey());
        } else {

      ).decodeBase64()!!

    val x509PublicKey =
      encodeKey(
        algorithm = RSA_ENCRYPTION,
        publicKeyBytes = publicKeyBytes,
      )
    val keyFactory = KeyFactory.getInstance("RSA")
    val publicKey = keyFactory.generatePublic(X509EncodedKeySpec(x509PublicKey.toByteArray()))
    val privateKey = keyFactory.generatePrivate(PKCS8EncodedKeySpec(privateKeyBytes.toByteArray()))

    val certificate =

    }

    private static final String BLOWFISH = "Blowfish";

    private static final String RSA = "RSA";

    /**
     * The algorithm to use for the cipher.
     */
    protected String algorithm = BLOWFISH;

    /**
     * The transformation to use for the cipher.
     */
    protected String transformation = RSA;

    /**
     * The key to use for encryption/decryption.
     */
    protected String key;

            "RC4 cipher not available in this JVM", "DES encryption is deprecated and not supported", "HMAC-SHA256 algorithm not found",
            "RSA key generation failed: key size not supported" })
    void testMessageConstructorWithCryptoMessages(String message) {
        // Given & When