(C) SSH Host Key Fingerprint

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

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#include <C_CkSsh.h>

void ChilkatSample(void)
    {
    HCkSsh ssh;
    const char *hostname;
    int port;
    BOOL success;
    const char *md5_fingerprint;
    BOOL includeKeyType;
    BOOL includeHashName;
    const char *sha256_fingerprint;

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

    ssh = CkSsh_Create();

    hostname = "ssh.example.com";
    port = 22;
    success = CkSsh_Connect(ssh,hostname,port);
    if (success != TRUE) {
        printf("%s\n",CkSsh_lastErrorText(ssh));
        CkSsh_Dispose(ssh);
        return;
    }

    // Get the classic MD5 fingeprint
    md5_fingerprint = CkSsh_hostKeyFingerprint(ssh);
    printf("%s\n",md5_fingerprint);

    // 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.)

    includeKeyType = TRUE;
    includeHashName = TRUE;
    sha256_fingerprint = CkSsh_getHostKeyFP(ssh,"SHA256",includeKeyType,includeHashName);
    printf("%s\n",sha256_fingerprint);

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

    // The key type and hash name can be optionally included or not.
    includeKeyType = FALSE;
    includeHashName = TRUE;
    sha256_fingerprint = CkSsh_getHostKeyFP(ssh,"SHA256",includeKeyType,includeHashName);
    printf("%s\n",sha256_fingerprint);

    // SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    includeKeyType = TRUE;
    includeHashName = FALSE;
    sha256_fingerprint = CkSsh_getHostKeyFP(ssh,"SHA256",includeKeyType,includeHashName);
    printf("%s\n",sha256_fingerprint);

    // ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    includeKeyType = FALSE;
    includeHashName = FALSE;
    sha256_fingerprint = CkSsh_getHostKeyFP(ssh,"SHA256",includeKeyType,includeHashName);
    printf("%s\n",sha256_fingerprint);

    // Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=


    CkSsh_Dispose(ssh);

    }