(C) Hash the Contents of a File (SHA256 and other hash algorithms)

Demonstrates how to hash the contents of a file using SHA256, SHA384, SHA512, MD2, MD5, HAVAL, RIPEMD, etc.

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#include <C_CkCrypt2.h>
#include <C_CkByteData.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    HCkCrypt2 crypt;
    HCkByteData hashBytes;
    HCkStringBuilder sb;

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

    crypt = CkCrypt2_Create();

    // Choose the hash algorithm.
    // Can be  "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320".
    CkCrypt2_putHashAlgorithm(crypt,"sha256");

    hashBytes = CkByteData_Create();
    success = CkCrypt2_HashFile(crypt,"qa_data/jpg/starfish.jpg",hashBytes);

    // Let's examine the hash as a hex string.
    sb = CkStringBuilder_Create();
    CkStringBuilder_AppendEncoded(sb,hashBytes,"hex");
    printf("SHA256 hash = %s\n",CkStringBuilder_getAsString(sb));


    CkCrypt2_Dispose(crypt);
    CkByteData_Dispose(hashBytes);
    CkStringBuilder_Dispose(sb);

    }