👏 Verify ingested message

dist/pigeon.rb

@@ -60,15 +60,17 @@ module Pigeon
   # /Constants for internal use only
 
   class Helpers
+    def self.verify_string(identity, signature, string)
+      key = Ed25519::VerifyKey.new(decode_multihash(identity.public_key))
+      raw_sig = decode_multihash(signature)
+      key.verify(raw_sig, string)
+    end
+
     def self.decode_multihash(string)
-      case string[0]
-      when BLOB_SIGIL, MESSAGE_SIGIL, IDENTITY_SIGIL
-        inner = string[1..-1].gsub(FOOTERS_REGEX, "")
-        Base64.urlsafe_decode64(inner)
+      if string[SIG_RANGE] == SIG_FOOTER
+        return Base64.urlsafe_decode64(string.gsub(SIG_FOOTER, ""))
       else
-        if signature[SIG_RANGE] == SIG_FOOTER
-          Base64.urlsafe_decode64(signature.gsub(SIG_FOOTER, ""))
-        end
+        return Base64.urlsafe_decode64(string[1..].gsub(FOOTERS_REGEX, ""))
       end
     end
   end

dist/pigeon/local_identity.rb

@@ -43,10 +43,6 @@ module Pigeon
       return b64 + SIG_FOOTER
     end
 
-    def verify(signature, string)
-      raise "TODO"
-    end
-
     def save!
       Pigeon::Storage.current.set_config(SEED_CONFIG_KEY, @seed)
       self

dist/pigeon/message.rb

@@ -3,7 +3,9 @@ require "digest"
 module Pigeon
   class Message
     attr_reader :author, :kind, :body, :signature, :depth, :prev
+
     class VerificationError < StandardError; end
+
     VERFIY_ERROR = "Expected field %s to equal %s. Got: %s"
     # Author a new message.
     def self.publish(draft, author: LocalIdentity.current)
@@ -66,7 +68,8 @@ module Pigeon
     end
 
     def verify_signature
-      author.verify(signature, template.render_without_signature)
+      tpl = template.render_without_signature
+      Helpers.verify_string(author, signature, tpl)
     end
 
     def initialize(author:, kind:, body:, signature: nil)

dist/pigeon/remote_identity.rb

@@ -9,13 +9,7 @@ module Pigeon
     attr_reader :public_key
 
     def initialize(multihash)
-      b64 = Base64.urlsafe_encode64(multihash)
-      @public_key = [IDENTITY_SIGIL, b64, IDENTITY_FOOTER].join("")
-    end
-
-    def verify(signature, string)
-      binding.pry
-      raise "TODO"
+      @public_key = multihash
     end
   end
 end