experiments

commit d2d782f43d34656fedafb1a4678921c1373859ea
parent 468408fcf170be76d7c80ffc0d1af54ce12f15f1
Author: Vetle Haflan <vetle@haflan.dev>
Date:   Thu, 28 Jan 2021 00:31:26 +0100

Add go directory with an encoding experiment

Diffstat:
A
go/encoding/shabase64.go
 | 
18
++++++++++++++++++

1 file changed, 18 insertions(+), 0 deletions(-)
diff --git a/go/encoding/shabase64.go b/go/encoding/shabase64.go
@@ -0,0 +1,18 @@
+package main
+
+import (
+	"crypto/sha256"
+	"encoding/base64"
+	"fmt"
+	"os"
+)
+
+// Takes a string as input and returns an URL-safe base64 encoded SHA224 sum
+func main() {
+	in := os.Args[1]
+	sum := sha256.Sum224([]byte(in))
+	// Unreserved characters: https://tools.ietf.org/html/rfc3986#section-2.3
+	b64enc := base64.NewEncoding("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.").WithPadding('-')
+	encoded := b64enc.EncodeToString(sum[:])
+	fmt.Println(encoded)
+}