RSA hu_RSAKeyGen always creates the same keys

I am trying to create a class that en - and decrypt strings with RSA. Later, these channels will be AES session keys.

For this purpose, I do the following steps:

  • create the global context
  • to register and to initialize the engine of sbg56
  • random create
  • create RSA-Params
  • generate RSA keys

This is basically my code:

int code;
code = hu_GlobalCtxCreateDefault(&sbCtx);
if (code != SB_SUCCESS) { return false; }

code = hu_RegisterSbg56(sbCtx);
if (code != SB_SUCCESS) { return false; }

code = hu_InitSbg56(sbCtx);
if (code != SB_SUCCESS) {
    return false;
}
code = hu_RngCreate(0, NULL, NULL, NULL, NULL, &rngCtx, sbCtx);
if (SB_SUCCESS != code) {
    return false;
}

code = hu_RSAParamsCreate(1024, rngCtx, NULL, &rsaParams, sbCtx);
if (SB_SUCCESS != code) {
    return false;
}
code = hu_RSAKeyGen(rsaParams, 0, NULL, &myPrivateKey, &myPublicKey, sbCtx);

return code == SB_SUCCESS;

This code is executed at startup. OpenSSL is used to create a private and public key RSA object. The purpose of the RSA is spilled on the console with the same result:

-----BEGIN RSA PRIVATE KEY-----
MIICXQIBAAKBgQD0ftYwD5cKZY27juINYTPl24YW2xSJHF7NeDCO+o2MDtlZPtgy
w+UB+pL3...

-----BEGIN RSA PUBLIC KEY-----
MIGJAoGBAPR+1jAPlwpljbuO4g1hM+XbhhbbFIkcXs14MI76jYwO2Vk+2DLD5QH6
kveLze...

Use the method hu_RSAKeyGen evil? Is it necessary to assign a custom public exponent?

Hi smiley, thank you very much for your answer.
It is one of the examples that I used to get in touch with the cryptographic library of BB.
I did almost the same way, but instead of hu_RngDrbgCreate, I used hu_RngCreate. After you change this and added a hu_RegisterSystemSeed, the generated RSA keys are diffenret. I use HU_DRBG_CIPHER instead of HU_DRBG_HASH. I do not found a description of the indecipherable, so I chose HU_DRBG_CIPHER because of its name.

My code works now, but I'm always interested in a response, why the keys were equal. I suggest that in the way that I used hu_RngCreate, the random number was always the same.

Tags: BlackBerry Developers

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    * Note 2. There could be an IPv6 entries too. However, they are not functional for Internet or LAN traffic. They are necessary for Win 7 homegroup special configuration.

    ---------------------------------------------------

    Above everything is OK, you must be able to connect to the router.  A window that says connected does not mean that you are really connected. Connection to the router means that you can enter the IP of the router base in an address bar in one go, being able to connect and configure the router menus see. If it is not connected in the log to router from any computer that can connect to the router wirelessly with a wire, disable wireless security, (make sure that the wireless SSID broadcast) is on and try to connect with no. wireless security.

    --------------------------------------------------

    I really checked and configured every thing and it doesn't work.

    Software firewall application that is not configured to allow local traffic (between the computer and the router is also a possible problem.
    some 3rd party software firewall continue to block the same aspects it traffic Local, they are turned Off (disabled). If possible, configure the firewall correctly or completely uninstall to allow a clean flow of local network traffic. If the 3rd party software is uninstalled, or disables, make sure Windows native firewall is active .

    Jack-MVP Windows Networking. WWW.EZLAN.NET

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