Encrypt in Java and Decrypt in ABAP

Hi,

I have done the following steps

1. Created a File PSE in ECC(private key using RSA with SHA-1 (1024) ). Exported the certificate (.cert) file.

2. Used this .cert file (public key) to encrypt a message in java. See the code below.

3. While trying to decrypt the message in ABAP (using SSF_KRN_ENVELOPE and the private key created in the step above), I am getting 'SSF 12 Decoding Failed'.

Has anyone done this before? Is it possible to achieve something like this. What am I doing wrong?

Java Code

String certFile = req.getPrivateResourcePath()+"/ECDparam.cert";

            InputStream inStream = new FileInputStream(certFile);

 

            CertificateFactory cf = CertificateFactory.getInstance("X.509");

  X509Certificate cert = (X509Certificate)cf.generateCertificate(inStream);

            inStream.close();

 

            SsfSigRcpList rcplist = new SsfSigRcpList();

  SsfSigRcpInfo rcpinfo = new SsfSigRcpInfo(cert);

  rcplist.add(rcpinfo);

 

 

   // Read the public key from certificate file

  byte [] tempPub = null;

  String sPub = null;

  RSAPublicKey pubkey = (RSAPublicKey) cert.getPublicKey();

            tempPub = pubkey.getEncoded();

            sPub = new String( tempPub );

           

            Cipher cipher = Cipher.getInstance("RSA"); 

            cipher.init(Cipher.ENCRYPT_MODE, pubkey);

            String message = "This is my secret message.";

            byte[] messageBytes = message.getBytes();

byte[] ciphertextBytes = cipher.doFinal(messageBytes);

ABAP Code

Encrypted message is copied from the output of the java program and passed to the string 'EXAMPLE' in the code below.

DATA: SIG_ID LIKE SSFINFO-ID VALUE 'CN=ECDparam, OU=I0020847400, OU=SAP Web AS, O=SAP Trust Community, C=DE',
             SIG_PROF LIKE SSFINFO-PROFILE VALUE '/usr/sap/ECD/DVEBMGS00/sec/ECDparams.pse',
             SIG_PWD LIKE SSFINFO-PASSWORD VALUE ''.

REFRESH:  DEV_RECIP_LIST.
CLEAR:    DEV_RECIP_LIST.
   DEV_RECIP_LIST-ID = SIG_ID .
   DEV_RECIP_LIST-PROFILE = SIG_PROF.
APPEND DEV_RECIP_LIST.


DATA EXAMPLE TYPE STRING.
       EXAMPLE = 'y¨Ç!ÈXÐ$ñÉ>/‚gr3á|#œáÿ²ke’“ϱ;®†™“w¤#Ÿ Ë™!·ÓÝ•ÞAÒ·N²ºTÞoÈ›)¦9iÞ0’„
ÙÆùÑcç·j·»vîg“R;$RØX4Ýu†g¨¸ÈÖ>ÜmP#g²IÚoÛÐF4'.
PERFORM CONVERT_TO_UTF8
USING EXAMPLE
CHANGING IN_DATA_TABLE-BINDATA.
       PARAMS-INDATALEN = xstrlen( IN_DATA_TABLE-BINDATA ).
APPEND IN_DATA_TABLE.


CALL FUNCTION 'SSF_KRN_DEVELOPE'
EXPORTING
               SSFTOOLKIT                   = TOOLKIT
               STR_FORMAT                   = WRAPPER
               B_OUTDEC                     = OUT_DEC
               IO_SPEC                      = IO_SPEC
               OSTR_ENVELOPED_DATA_L        = PARAMS-INDATALEN
IMPORTING
               OSTR_OUTPUT_DATA_L           = PARAMS-OUTDATALEN
               CRC                          = SSFRC
TABLES
               OSTR_ENVELOPED_DATA          = IN_DATA_TABLE
               RECIPIENT                    = DEV_RECIP_LIST
               OSTR_OUTPUT_DATA             = OUT_DATA_TABLE
EXCEPTIONS
               SSF_KRN_ERROR                = 399
               SSF_KRN_NOOP                 = 201
               SSF_KRN_NOMEMORY             = 202
               SSF_KRN_OPINV                = 203
               SSF_KRN_RECIPIENT_ERROR      = 206
               SSF_KRN_INPUT_DATA_ERROR     = 208
               SSF_KRN_INVALID_PAR          = 209
               SSF_KRN_INVALID_PARLEN       = 210
               SSF_FB_INPUT_PARAMETER_ERROR = 211
OTHERS                       = 212.

Error log from SM21.

Any pointers/suggestions.

Regards,

Sharadha