GOLANG Array Hash

hasher-array.go

// Author: Jason Harper, Uber Technologies, Inc.
// Date: September 11, 2020
// Version: 1
// Notes: A prototype SHA256 hashing script, using a shared secret key
// Notes: reading data from a single list of SSN or DL, or whatever, and a two column CSV
// Notes: secret key data is just for testing
// Notes: this program helped me understand some basic GO concepts

package main


import (
	"crypto/hmac"
	"crypto/sha256"
	"encoding/csv"
	"encoding/hex"
	"fmt"
	"os"
	//"strconv"
)

type CsvLine struct {
	Column1 string
	Column2 string
}

func main() {
	var count int
	count = 1
	lines, err := ReadCsv("ssn-and-dl.csv") //obv need to have this file created ahead of time
	if err != nil {
		panic(err)
	}

	// Loop through lines & turn into object
	for _, line := range lines {
		data := CsvLine{
			Column1: line[0],
			Column2: line[1],
		}
		key := "5C646D6E58DECE7203C28AD290E2249E42455A3F856E2297291880B37B50B9DA" //not a real-key
		ssn := hmac.New(sha256.New, []byte(key))
		dl := hmac.New(sha256.New, []byte(key))

		if data.Column1 == "raw_ssn" {
			fmt.Println("")
		} else {
			ssn.Write([]byte(data.Column1))
			dl.Write([]byte(data.Column2))
			ssn_sha := hex.EncodeToString(ssn.Sum(nil))
			dl_sha := hex.EncodeToString(dl.Sum(nil))
			fmt.Println("SSN Result:",count, ssn_sha + " " + "DL Result:",count , dl_sha)
			count=count +1
		}

	}
}

// ReadCsv accepts a file and returns its content as a multi-dimentional type
// with lines and each column. Only parses to string type.
func
ReadCsv(filename string) ([][]string, error) {

	// Open CSV file
	f, err := os.Open(filename)
	if err != nil {
		return [][]string{}, err
	}
	defer f.Close()

	// Read File into a Variable
	lines, err := csv.NewReader(f).ReadAll()
	if err != nil {
		return [][]string{}, err
	}

	return lines, nil
}