C++

SFTP Host Key Fingerprint

See more SFTP Examples

Demonstrates how to get the SSH server's host key fingerprint after connecting. C++

#include <CkSFtp.h>

void ChilkatSample(void)
    {
    bool success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSFtp sftp;

    const char *hostname = "sftp.example.com";
    int port = 22;
    success = sftp.Connect(hostname,port);
    if (success != true) {
        std::cout << sftp.lastErrorText() << "\r\n";
        return;
    }

    // Get the classic MD5 fingeprint
    const char *md5_fingerprint = sftp.hostKeyFingerprint();
    std::cout << md5_fingerprint << "\r\n";

    // Sample output:
    // ssh-rsa 3072 21:b0:d8:41:4e:ef:78:10:20:af:01:b7:71:5d:eb:94

    // Starting in Chilkat v9.5.0.92, we can also get the SHA256 fingerprint.
    // (it is also possible to get fingerprints using other hash algorithms such as SHA384, SHA512, etc.)

    bool includeKeyType = true;
    bool includeHashName = true;
    const char *sha256_fingerprint = sftp.getHostKeyFP("SHA256",includeKeyType,includeHashName);
    std::cout << sha256_fingerprint << "\r\n";

    // Sample output:
    // ssh-rsa SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    // The key type and hash name can be optionally included or not.
    includeKeyType = false;
    includeHashName = true;
    sha256_fingerprint = sftp.getHostKeyFP("SHA256",includeKeyType,includeHashName);
    std::cout << sha256_fingerprint << "\r\n";

    // SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    includeKeyType = true;
    includeHashName = false;
    sha256_fingerprint = sftp.getHostKeyFP("SHA256",includeKeyType,includeHashName);
    std::cout << sha256_fingerprint << "\r\n";

    // ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    includeKeyType = false;
    includeHashName = false;
    sha256_fingerprint = sftp.getHostKeyFP("SHA256",includeKeyType,includeHashName);
    std::cout << sha256_fingerprint << "\r\n";

    // Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=
    }