Xbase++

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.

Xbase++

LOCAL oCrypt
LOCAL cTreeHashHex

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

oCrypt := CreateObject("Chilkat.Crypt2")

//  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.
oCrypt:HashAlgorithm := "sha256-tree-hash"

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

cTreeHashHex := oCrypt:HashFileENC("qa_data/jpg/penguins.jpg")
? "SHA256 tree hash = " + cTreeHashHex

oCrypt:destroy()