filemd5

 # The filemd5() function is available in Terraform 0.11.12 and later
 # For Terraform 0.11.11 and earlier, use the md5() function and the file() function:
 # etag = "${md5(file("path/to/file"))}"

Terraform functions, Terraform collection functions: tolist, toset, length, sum, file, join, depends_on, zipmap, replace, lookup, read files, concat, merge, templatefile, for_each, format, element, slice, try, filebase64, upper, filemd5, coalesce, formatlist, flatten

MD5, md5sum, bcrypt, CRAM-MD5, SHA, filemd5