C

Generate DSA SSH Key

See more SSH Key Examples

Generates a DSA SSH key and saves to various public and private key file formats (OpenSSH and PuTTY). C

#include <C_CkSshKey.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkSshKey key;
    int numBits;
    const char *exportedKey;
    BOOL exportEncrypted;

    success = FALSE;

    key = CkSshKey_Create();

    //  numBits should be a minimum of 1024 and
    //  a multiple of 64.  Typical values are
    //  1024 or 2048. 
    numBits = 2048;
    success = CkSshKey_GenerateDsaKey(key,numBits);
    if (success != TRUE) {
        printf("Invalid numBits passed to DSA key generation method.\n");
        CkSshKey_Dispose(key);
        return;
    }

    //  Note: Generating a public/private key pair is CPU intensive
    //  and may take a short amount of time (more than few seconds,
    //  but less than a minute).

    //  Export the DSA private key to OpenSSH, PuTTY, and XML and save. 
    exportEncrypted = FALSE;
    exportedKey = CkSshKey_toOpenSshPrivateKey(key,exportEncrypted);
    //  Chilkat provides a SaveText method for convenience...
    success = CkSshKey_SaveText(key,exportedKey,"privkey_openssh_unencrypted.pem");

    //  Export with encryption to OpenSSH private key format:
    CkSshKey_putPassword(key,"secret");
    exportEncrypted = TRUE;
    exportedKey = CkSshKey_toOpenSshPrivateKey(key,exportEncrypted);
    success = CkSshKey_SaveText(key,exportedKey,"privkey_openssh_encrypted.pem");

    //  Export the DSA private key to unencrypted PuTTY format:
    exportEncrypted = FALSE;
    exportedKey = CkSshKey_toPuttyPrivateKey(key,exportEncrypted);
    success = CkSshKey_SaveText(key,exportedKey,"privkey_putty_unencrypted.ppk");

    //  Export the DSA private key to encrypted PuTTY format:
    CkSshKey_putPassword(key,"secret");
    exportEncrypted = TRUE;
    exportedKey = CkSshKey_toPuttyPrivateKey(key,exportEncrypted);
    success = CkSshKey_SaveText(key,exportedKey,"privkey_putty_encrypted.ppk");

    //  Export private key to XML:
    exportedKey = CkSshKey_toXml(key);
    success = CkSshKey_SaveText(key,exportedKey,"privkey.xml");

    //  ----------------------------------------------------
    //  Now for the public key....
    //  ----------------------------------------------------

    //  The Secure Shell (SSH) Public Key File Format
    //  is documented in RFC 4716.
    exportedKey = CkSshKey_toRfc4716PublicKey(key);
    success = CkSshKey_SaveText(key,exportedKey,"pubkey_rfc4716.pub");

    //  OpenSSH has a separate public-key file format, which 
    //  is also supported by Chilkat SshKey:
    exportedKey = CkSshKey_toOpenSshPublicKey(key);
    success = CkSshKey_SaveText(key,exportedKey,"pubkey_openSsh.pub");

    printf("Finished.\n");


    CkSshKey_Dispose(key);

    }