👏🎉 Message verification works on the Golang version! Hooray!

README.md

@@ -20,14 +20,13 @@ Email `contact@vaporsfot.xyz` if you have any questions.
  * Writing a BNF grammar for message parsing
  * Test coverage increases
  * Manual QA of features and edge cases
+ * Providing constructive feedback on documentation
  * Cross-compiling windows binaries
  * General Golang help (I am a Golang novice- project structure could be improved)
- * Security auditing and vulnerability discovery. Please send security concerns to `contact@vaporsoft.xyz`.
+ * Security auditing and vulnerability discovery. Please send security concerns to `contact@vaporsoft.xyz` privately.
 
 # TODO
 
-**CURRENT TASK:** Write a message parser.
-
  - [ ] Add a real testing lib to DRY things up.
  - [ ] Get a good CI system going? Run tests at PR time, provide prebuilt binaries, prevent coverage slips, etc..
  - [ ] Add a `transact()` helper to ensure all transactions are closed out.
@@ -38,8 +37,8 @@ Email `contact@vaporsfot.xyz` if you have any questions.
 
  |Done?|Noun        |Verb       | Flag / arg 1  | Flag 2    |
  |-----|------------|-----------|---------------|-----------|
- |     |blob        |remove     | mhash         |           |
  |     |bundle      |ingest     |               |           |
+ |     |blob        |remove     | mhash         |           |
  |     |message     |show       | message mhash |           |
  |     |message     |find       | --all         |           |
  |     |message     |find       | --last        |           |

project/decoders.go

@@ -21,6 +21,10 @@ func B32Decode(input string) []byte {
 	return output
 }
 
+func decodeMhash(input string) []byte {
+	return []byte(B32Decode(input[5:]))
+}
+
 func validateMhash(input string) string {
 	arry := strings.Split(input, ".")
 	if len(arry) != 2 {

project/parser.go

@@ -119,13 +119,17 @@ func parseBody(state *parserState) {
 }
 
 func parseFooter(state *parserState) {
+	t := state.scanner.Text()
+	chunks := strings.Split(t, " ")
+	state.buffer.signature = chunks[1]
 	state.mode = parsingDone
 	err := verifyShallow(&state.buffer)
 	if err != nil {
-		state.results = append(state.results, state.buffer)
-		state.buffer = pigeonMessage{}
 		panicf("Message verification failed for %s. %s", state.buffer.signature, err)
 	}
+	state.results = append(state.results, state.buffer)
+	state.buffer.body = []pigeonBodyItem{}
+	state.buffer = pigeonMessage{}
 }
 
 func maybeContinue(state *parserState) {

project/verify.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"crypto/ed25519"
 	"errors"
 	"fmt"
 	"regexp"
@@ -69,8 +70,18 @@ func validateBodyValue(value *string) error {
 	return nil
 }
 
-func validateSignature(_topHalf string, _b32signature string) error {
-	return errors.New("WIP")
+func validateSignature(message *pigeonMessage, topHalf string) error {
+	asciiSignature := message.signature
+	signature := []byte(B32Decode(asciiSignature))
+	publicKey := decodeMhash(message.author)
+	ok := ed25519.Verify(publicKey, []byte(topHalf), signature)
+
+	if ok {
+		return nil
+	}
+
+	error := fmt.Sprintf("Can't verify message %s", message.signature)
+	return errors.New(error)
 }
 
 func verifyBodyItem(bodyItem *pigeonBodyItem) error {
@@ -113,6 +124,6 @@ func verifyShallow(message *pigeonMessage) error {
 	}
 
 	buffer.Write([]byte("\n"))
-	validateSignature(buffer.String(), message.signature)
+	validateSignature(message, buffer.String())
 	return nil
 }