Add digest to request

go.mod

@@ -4,6 +4,7 @@ go 1.23.4
 
 require (
 	github.com/common-fate/httpsig v0.2.1
+	github.com/opencontainers/go-digest v1.0.0
 	golang.org/x/crypto v0.33.0
 )
 

go.sum

@@ -4,6 +4,8 @@ github.com/dunglas/httpsfv v1.0.2 h1:iERDp/YAfnojSDJ7PW3dj1AReJz4MrwbECSSE59JWL0
 github.com/dunglas/httpsfv v1.0.2/go.mod h1:zID2mqw9mFsnt7YC3vYQ9/cjq30q41W+1AnDwH8TiMg=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
+github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
 golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=

main.go

@@ -9,6 +9,7 @@ import (
 	"os"
 
 	"crispbyte.dev/sig-auth/client"
+	"github.com/opencontainers/go-digest"
 	"golang.org/x/crypto/ssh"
 )
 
@@ -30,10 +31,18 @@ func main() {
 		log.Fatal(err)
 	}
 
-	resp, err := client.Post(
-		"http://localhost:8080/post",
-		"application/json",
-		bytes.NewBuffer(json_data))
+	id := digest.FromBytes(json_data)
+
+	req, err := http.NewRequest("POST", "http://localhost:8080/post", bytes.NewBuffer(json_data))
+
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	req.Header.Add("Content-Digest", string(id.Algorithm())+"="+id.Encoded())
+	req.Header.Add("Content-Type", "application/json")
+
+	resp, err := client.Do(req)
 
 	if err != nil {
 		log.Fatal(err)