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(C) Convert PuTTY Private Key (ppk) to OpenSSH (pem)

Convert a PuTTY format private key file (.ppk) to OpenSSH (.pem).

Chilkat C/C++ Library Downloads

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#include <C_CkSshKey.h>

void ChilkatSample(void)
    {
    HCkSshKey key;
    BOOL success;
    const char *keyStr;
    const char *unencryptedKeyStr;
    BOOL bEncrypt;
    const char *encryptedKeyStr;

    key = CkSshKey_Create();

    //  Load an unencrypted or encrypted PuTTY private key.

    //  If  your PuTTY private key is encrypted, set the Password
    //  property before calling FromPuttyPrivateKey.
    //  If your PuTTY private key is not encrypted, it makes no diffference
    //  if Password is set or not set.
    CkSshKey_putPassword(key,"secret");

    //  First load the .ppk file into a string:

    keyStr = CkSshKey_loadText(key,"putty_private_key.ppk");

    //  Import into the SSH key object:
    success = CkSshKey_FromPuttyPrivateKey(key,keyStr);
    if (success != TRUE) {
        printf("%s\n",CkSshKey_lastErrorText(key));
        CkSshKey_Dispose(key);
        return;
    }

    //  Convert to an encrypted or unencrypted OpenSSH key.

    //  First demonstrate converting to an unencrypted OpenSSH key

    bEncrypt = FALSE;
    unencryptedKeyStr = CkSshKey_toOpenSshPrivateKey(key,bEncrypt);
    success = CkSshKey_SaveText(key,unencryptedKeyStr,"unencrypted_openssh.pem");
    if (success != TRUE) {
        printf("%s\n",CkSshKey_lastErrorText(key));
        CkSshKey_Dispose(key);
        return;
    }

    //  Save to an encrypted OpenSSH PEM file:

    bEncrypt = TRUE;
    CkSshKey_putPassword(key,"myPassword");
    encryptedKeyStr = CkSshKey_toOpenSshPrivateKey(key,bEncrypt);
    success = CkSshKey_SaveText(key,encryptedKeyStr,"encrypted_openssh.pem");
    if (success != TRUE) {
        printf("%s\n",CkSshKey_lastErrorText(key));
        CkSshKey_Dispose(key);
        return;
    }

    printf("Done!\n");


    CkSshKey_Dispose(key);

    }

 

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