C

SFTP Host Key Fingerprint

See more SFTP Examples

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

#include <C_CkSFtp.h>

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

    success = FALSE;

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

    sftp = CkSFtp_Create();

    hostname = "sftp.example.com";
    port = 22;
    success = CkSFtp_Connect(sftp,hostname,port);
    if (success != TRUE) {
        printf("%s\n",CkSFtp_lastErrorText(sftp));
        CkSFtp_Dispose(sftp);
        return;
    }

    // Get the classic MD5 fingeprint
    md5_fingerprint = CkSFtp_hostKeyFingerprint(sftp);
    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 = CkSFtp_getHostKeyFP(sftp,"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 = CkSFtp_getHostKeyFP(sftp,"SHA256",includeKeyType,includeHashName);
    printf("%s\n",sha256_fingerprint);

    // SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

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

    // ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

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

    // Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=


    CkSFtp_Dispose(sftp);

    }