1024-bit encryption

 

One hand doesn't know what the other is doing...
I got exactly the same run-around when we were obtaining the domestic
version of WL 4.5. Your sales rep has a request form available for you to
fill out. They just don't seem eagre to give it out. After you've faxed that
back they'll send you the new keys required to enable 128-bit encryption.
-Brendan
"Alan Hoyt" <[email protected]> wrote in message
news:[email protected]..
Quoting from Weblogic's
http://www.weblogic.com/docs/classdocs/API_secure.html
documentation:
The more bits in a key, the more possible keys, and the
more difficult it is to guess your
private key. United States export regulations limit the
generally available version of
WebLogic to 512-bit public keys. You can apply to
WebLogic sales for the domestic
version, which supports 512-, 768-, and 1024-bit keys.
If you want to be able to support
both domestic- and exportable-strength browsers, you
need the domestic version of
WebLogic, and you must obtain and install both domestic-
and exportable-strength
certificates.
OK, sounds simple - we contacted sales to acquire the
domestic version, but they had no idea what we are
requesting, so they forwarded us to tech. support - tech.
support sends us back to sales. We have been going back and
forth between sales and tech. support for three weeks .
What gives? Is a 1024-bit version even available?
Extremely frustrated
- A. Hoyt -

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  • Invalid Key Exception: Unsupported key type: Sun RSA public key, 1024 bits

    I am trying to retrieve certificates from Microsoft Keystore and extract its keys using SunMSCAPI in jdk 1.6. It gives me an invalid key exception, when I am trying to wrap the Symmetric key (which was previously used to perform AES encryption on data), using RSA algorithm.
    Code snippet:
               // RSA 1024 bits Asymmetric encryption of Symmetric AES key             
                // List the certificates from Microsoft KeyStore using SunMSCAPI.
                      System.out.println("List of certificates found in Microsoft Personal Keystore:");
                       KeyStore ks = KeyStore.getInstance("Windows-MY", "SunMSCAPI");
                       ks.load(null, null) ;
                       Enumeration en = ks.aliases() ;
                       PublicKey RSAPubKey = null;
                       Key RSAPrivKey = null;
                       int i = 0;
                       while (en.hasMoreElements()) {
                            String aliasKey = (String)en.nextElement() ;              
                            X509Certificate c = (X509Certificate) ks.getCertificate(aliasKey) ;     
                            String sss = ks.getCertificateAlias(c);
                            if(sss.equals("C5151997"))
                            System.out.println("---> alias : " + sss) ;
                            i= i + 1;
                            String str = c.toString();
                            System.out.println(" Certificate details : " + str ) ;
                          RSAPubKey = c.getPublicKey();
                            RSAPrivKey = ks.getKey(aliasKey, null);  //"mypassword".toCharArray()
                            Certificate[] chain = ks.getCertificateChain(aliasKey);     
                       System.out.println("No of certificates found from Personal MS Keystore: " + i);
                // Encrypt the generated Symmetric AES Key using RSA cipher      
                        Cipher rsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", ks.getProvider().getName());            
                       rsaCipher.init(Cipher.WRAP_MODE, RSAPubKey);
                       byte[] encryptedSymmKey = rsaCipher.wrap(aeskey);   
                       System.out.println("Encrypted Symmetric Key :" + new String(encryptedSymmKey));
                       System.out.println("Encrypted Symmetric Key Length in Bytes: " + encryptedSymmKey.length);
                       // RSA Decryption of Encrypted Symmetric AES key
                       rsaCipher.init(Cipher.UNWRAP_MODE, RSAPrivKey);
                       Key decryptedKey = rsaCipher.unwrap(encryptedSymmKey, "AES", Cipher.SECRET_KEY);Output:
    List of certificates found in Microsoft Personal Keystore:
    ---> alias : C5151997
    Certificate details : [
    Version: V3
    Subject: CN=C5151997, O=SAP-AG, C=DE
    Signature Algorithm: SHA1withRSA, OID = 1.2.840.113549.1.1.5
    Key: Sun RSA public key, 1024 bits
    modulus: 171871587533146191561538456391418351861663300588728159334223437391061141885590024223283480319626015611710315581642512941578588886825766256507714725820048129123720143461110410353346492039350478625370269565346566901446816729164309038944197418238814947654954590754593726047828813400082450341775203029183105860831
    public exponent: 65537
    Validity: [From: Mon Jan 24 18:17:49 IST 2011,
                   To: Wed Jan 23 18:17:49 IST 2013]
    Issuer: CN=SSO_CA, O=SAP-AG, C=DE
    SerialNumber: [    4d12c509 00000005 eb85]
    Certificate Extensions: 6
    [1]: ObjectId: 2.5.29.14 Criticality=false
    SubjectKeyIdentifier [
    KeyIdentifier [
    0000: 07 E5 83 A1 B2 B7 DF 6B 4B 67 9C 1D 42 C9 0D F4 .......kKg..B...
    0010: 35 76 D3 F7 5v..
    [2]: ObjectId: 2.5.29.35 Criticality=false
    AuthorityKeyIdentifier [
    KeyIdentifier [
    0000: E4 C4 2C 93 20 AF DA 4C F2 53 68 4A C0 E7 EC 30 ..,. ..L.ShJ...0
    0010: 8C 0C 3B 9A ..;.
    [3]: ObjectId: 1.3.6.1.4.1.311.21.7 Criticality=false
    Extension unknown: DER encoded OCTET string =
    0000: 04 30 30 2E 06 26 2B 06 01 04 01 82 37 15 08 82 .00..&+.....7...
    0010: D1 E1 73 84 E4 FE 0B 84 FD 8B 15 83 E5 90 1B 83 ..s.............
    0020: E6 A1 43 81 62 84 B1 DA 50 9E D3 14 02 01 64 02 ..C.b...P.....d.
    0030: 01 1B ..
    [4]: ObjectId: 2.5.29.17 Criticality=false
    SubjectAlternativeName [
    RFC822Name: [email protected]
    [5]: ObjectId: 2.5.29.15 Criticality=true
    KeyUsage [
    DigitalSignature
    Non_repudiation
    Key_Encipherment
    Data_Encipherment
    [6]: ObjectId: 2.5.29.19 Criticality=true
    BasicConstraints:[
    CA:false
    PathLen: undefined
    Algorithm: [SHA1withRSA]
    Signature:
    0000: B3 C5 92 66 8D D7 ED 6D 51 12 63 CC F4 52 18 B9 ...f...mQ.c..R..
    0010: B8 A6 78 F7 ED 7D 78 18 DA 71 09 C9 AE C8 49 23 ..x...x..q....I#
    0020: F5 32 2F 0F D1 C0 4C 08 2B 6D 3C 11 B9 5F 5B B5 .2/...L.+m<.._[.
    0030: 05 D9 CA E6 F9 0A 94 14 E7 C6 7A DB 63 FE E5 EC ..........z.c...
    0040: 48 94 8C 0D 77 92 59 DE 34 6E 77 1A 24 FE E3 C1 H...w.Y.4nw.$...
    0050: D8 0B 52 6A 7E 22 13 71 D7 F8 AF D1 17 C8 64 4F ..Rj.".q......dO
    0060: 83 EA 2D 6A CA 7F C3 84 37 15 FE 99 73 1D 7C D1 ..-j....7...s...
    0070: 6D B4 99 09 62 B9 0F 18 33 4C C6 66 7A 9F C0 DB m...b...3L.fz...
    No of certificates found from Personal MS Keystore: 1
    Exception in thread "main" java.security.InvalidKeyException: Unsupported key type: Sun RSA public key, 1024 bits
    modulus: 171871587533146191561538456391418351861663300588728159334223437391061141885590024223283480319626015611710315581642512941578588886825766256507714725820048129123720143461110410353346492039350478625370269565346566901446816729164309038944197418238814947654954590754593726047828813400082450341775203029183105860831
    public exponent: 65537
         at sun.security.mscapi.RSACipher.init(RSACipher.java:176)
         at sun.security.mscapi.RSACipher.engineInit(RSACipher.java:129)
         at javax.crypto.Cipher.init(DashoA13*..)
         at javax.crypto.Cipher.init(DashoA13*..)
         at com.sap.srm.crpto.client.applet.CryptoClass.main(CryptoClass.java:102)
    Edited by: sabre150 on 18-Jul-2011 03:47
    Added [ code] tags to make code readable.

    A bit of research indicates that the classes of the keys obtained by
                          RSAPubKey = c.getPublicKey();
                               RSAPrivKey = ks.getKey(aliasKey, null);  //"mypassword".toCharArray()are sun.security.rsa.RSAPublicKeyImpl and sun.security.*mscapi*.RSAPrivateKey . It seems that for Cipher objects from the SunMSCAPI provider cannot accept RSA public keys of class sun.security.rsa.RSAPublicKeyImpl and that the SunMSCAPI will only accept RSA private keys of class sun.security.mscapi.RSAPrivateKey.
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    My working test code based on your code implementing this approach is :
            // RSA 1024 bits Asymmetric encryption of Symmetric AES key             
            // List the certificates from Microsoft KeyStore using SunMSCAPI.
            System.out.println("List of certificates found in Microsoft Personal Keystore:");
            KeyStore ks = KeyStore.getInstance("Windows-MY", "SunMSCAPI");
            ks.load(null, null);
            Enumeration en = ks.aliases();
            PublicKey RSAPubKey = null;
            Key RSAPrivKey = null;
            int i = 0;
            while (en.hasMoreElements())
                String aliasKey = (String) en.nextElement();
                X509Certificate c = (X509Certificate) ks.getCertificate(aliasKey);
                String sss = ks.getCertificateAlias(c);
                if (sss.equals("rsa_key")) // The alias for my key - make sure you change it back to your alias
                    System.out.println("---> alias : " + sss);
                    i = i + 1;
                    String str = c.toString();
                    System.out.println(" Certificate details : " + str);
                    RSAPubKey = c.getPublicKey();
             System.out.println(RSAPubKey.getClass().getName());
                   RSAPrivKey = ks.getKey(aliasKey, null);  //"mypassword".toCharArray()
            System.out.println(RSAPrivKey.getClass().getName());
                    Certificate[] chain = ks.getCertificateChain(aliasKey);
            System.out.println(ks.getProvider().getName());
            System.out.println("No of certificates found from Personal MS Keystore: " + i);
            Cipher rsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");//, ks.getProvider().getName());       !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
                rsaCipher.init(Cipher.WRAP_MODE, RSAPubKey);
            byte[] keyBytes =
                1, 2, 3, 4, 5, 6, 7, 8, 2, 3, 4, 5, 6, 7, 8, 9
            SecretKey aeskey = new SecretKeySpec(keyBytes, "AES");
            byte[] encryptedSymmKey = rsaCipher.wrap(aeskey);
            System.out.println("Encrypted Symmetric Key :" + Arrays.toString(encryptedSymmKey));
            System.out.println("Encrypted Symmetric Key Length in Bytes: " + encryptedSymmKey.length);
            // RSA Decryption of Encrypted Symmetric AES key
            Cipher unwrapRsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", ks.getProvider().getName());       //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
            unwrapRsaCipher.init(Cipher.UNWRAP_MODE, RSAPrivKey);
            Key decryptedKey = unwrapRsaCipher.unwrap(encryptedSymmKey, "AES", Cipher.SECRET_KEY);
            System.out.println("Decrypted Symmetric Key :" + Arrays.toString(decryptedKey.getEncoded())); // Matches the 'keyBytes' above

  • How to Implement 128 bit Encryption

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    I don't use Tomcat, but with my web server you can configure
    the SSL protocol versions it accepts, and the ciphers it accepts;
    ie I can switch off everything other than RC4-128. -- Can the same
    thing be done in Tomcat, and how can it be done?

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    "Gennady" <[email protected]> wrote in message
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