PowerBuilder

Compute Glacier SHA256 Tree Hash of a File

See more Amazon Glacier Examples

Computes the Amazon Glacier SHA256 tree hash for a file.

Note: This example requires Chilkat v9.5.0.78 or greater.

PowerBuilder

integer li_rc
oleobject loo_Crypt
string ls_TreeHashHex

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

loo_Crypt = create oleobject
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// For more information about Amazon Glacier tree hashes, see Computing Glacier Checksums
// Chilkat added the "sha256-tree-hash" algorithm in v9.5.0.78 to make it easy to compute the Glacier tree hash checksum
// of a file or from bytes in memory.
loo_Crypt.HashAlgorithm = "sha256-tree-hash"

// Return the hash in lowercase hexidecimal format.
loo_Crypt.EncodingMode = "hexlower"

ls_TreeHashHex = loo_Crypt.HashFileENC("qa_data/jpg/penguins.jpg")
Write-Debug "SHA256 tree hash = " + ls_TreeHashHex


destroy loo_Crypt