(MFC) Hash File: SHA-1, HAVAL, MD2, MD5, SHA-256, SHA-384, SHA-512

Computing the hash for a file of any size.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkCrypt2.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkCrypt2 crypt;

    // Any type of file may be hashed.
    // There is  no size limitation because the file is consumed
    // in streaming mode internally.
    const char *filename = 0;
    filename = "something.zip";

    crypt.put_HashAlgorithm("sha1");
    crypt.put_EncodingMode("hex");

    // Other possible EncodingMode settings are: 
    // "quoted-printable", "base64", "base32", and "url"

    const char *hash = crypt.hashFileENC(filename);
    strOut.append("SHA1:");
    strOut.append("\r\n");
    strOut.append(hash);
    strOut.append("\r\n");

    // Hash using MD2
    crypt.put_HashAlgorithm("md2");
    hash = crypt.hashFileENC(filename);
    strOut.append("MD2:");
    strOut.append("\r\n");
    strOut.append(hash);
    strOut.append("\r\n");

    // Hash using MD5
    crypt.put_HashAlgorithm("md5");
    hash = crypt.hashFileENC(filename);
    strOut.append("MD5:");
    strOut.append("\r\n");
    strOut.append(hash);
    strOut.append("\r\n");

    // Hash using SHA-256
    crypt.put_HashAlgorithm("sha256");
    hash = crypt.hashFileENC(filename);
    strOut.append("SHA256:");
    strOut.append("\r\n");
    strOut.append(hash);
    strOut.append("\r\n");

    // Hash using SHA-384
    crypt.put_HashAlgorithm("sha384");
    hash = crypt.hashFileENC(filename);
    strOut.append("SHA384:");
    strOut.append("\r\n");
    strOut.append(hash);
    strOut.append("\r\n");

    // Hash using SHA-512
    crypt.put_HashAlgorithm("sha512");
    hash = crypt.hashFileENC(filename);
    strOut.append("SHA512:");
    strOut.append("\r\n");
    strOut.append(hash);
    strOut.append("\r\n");

    // Hash using HAVAL
    // There are two additional properties relevant to HAVAL:
    // HavalRounds, and KeyLength.
    // HavalRounds can have values of 3, 4, or 5.
    // KeyLength can have values of 128, 160, 192, 224, or 256
    crypt.put_HashAlgorithm("haval");
    crypt.put_HavalRounds(5);
    crypt.put_KeyLength(256);
    hash = crypt.hashFileENC(filename);
    strOut.append("Haval:");
    strOut.append("\r\n");
    strOut.append(hash);
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }