Functionality to provide hexadecimal hash of the object inside google cloud bucket

[sourabhxyz]

Community Note

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Description

Google cloud has a facility to give md5 hash in hexadecimal format as well by using -h flag in gsutil, see here. But this provider only provides the md5 hash (see here)which is obtained by converting this hexadecimal hash to binary and then doing base 64 encoding to it which is unusual. It would be helpful if this provider could simply leverage this built in feature provided by GCP.

New or Affected Resource(s)

• google_storage_bucket_object

Potential Terraform Configuration

output "uploaded_gcp_md5_hash_matched" {
  value = "${google_storage_bucket_object.gcp_controller_dir.md5hexhash == var.gcp_controller_md5 ? "Yes" : "No, please re-run the script as md5 hash didn't match"}"
}

[mitj04]

b/262698141

[mitj04]

• Resource Name - google_storage_bucket_object

• API Docs -

  • GET call
  • Resource Representations

• Notes -

  • The base64 md5 hash for the object that is computed by the server is represented by the field md5Hash in the resource representation. However, there isn't a field that can provide the md5 hash in hexadecimal form.
  • The probable fix would be to add a new output-only field called md5HexHash. Its value can be obtained from the md5Hash by converting base64 to hex.

• Possible conversion from base64 to hex for md5Hash:

// decode first
p, err := base64.StdEncoding.DecodeString(response["md5Hash"])
if err != nil {
    // handle error
}
// encode
hmd5HexHash:= hex.EncodeToString(p)
fmt.Println(md5HexHash) // prints md5HexHash

[rileykarson]

Note: If there's a builtin Terraform function we should close this based on that rather than implement it directly in the resource.