release v1.0.0 (#23)

README.md

@@ -12,13 +12,28 @@ Server is using Go, Postgres, GraphQL and Redis.
 
 Server endpoint: https://stegoer-server.herokuapp.com/
 
+Development documentation: https://github.com/stegoer/server/blob/main/README.md
+
+Reference documentation: https://stegoer.github.io/client
+
 Source code: https://github.com/stegoer/server
 
 ---
 
 ## Installation
 
-### Install dependencies
+### Install instructions
+
+1. Install Go https://go.dev/doc/install
+2. Install PostgreSQL https://www.postgresql.org/download/
+3. Install Redis https://redis.io/docs/getting-started/
+4. Clone this repository
+
+```sh
+git clone [email protected]:stegoer/server.git
+```
+
+5. Install dependencies
 
 ```sh
 go get ./...

pkg/infrastructure/graphql/graphql.go

@@ -24,8 +24,8 @@ import (
 
 const (
 	lruQueryCacheSize = 1000
-	maxUploadSize     = 50 * 1024 * 1024 // 50MB
-	maxMemory         = 50 * 1024 * 1024 // 50MB
+	maxUploadSize     = 30 * 1024 * 1024 // 30MB
+	maxMemory         = 30 * 1024 * 1024 // 30MB
 	complexityLimit   = 1000
 )
 

pkg/infrastructure/server/server.go

@@ -19,7 +19,7 @@ import (
 )
 
 const (
-	maxBytes        = 50 * 1024 * 1024 // 50MB
+	maxBytes        = 30 * 1024 * 1024 // 30MB
 	timeOutDeadline = time.Second * 30
 	shutdownSignal  = 1
 )

pkg/steganography/metadata.go

@@ -130,10 +130,26 @@ func MetadataFromBinaryBuffer(binaryBuffer *bytes.Buffer) (*Metadata, error) {
 
 	if len(byteSlice) != metadataLength {
 		return nil, errors.New(
-			"buffer length does not match expected metadata length",
+			"metadata: buffer length does not match expected metadata length",
 		)
 	}
 
+	if !ValidateLSB(byteSlice[8]) {
+		return nil, fmt.Errorf(
+			"metadata: invalid number of least significant bits: %d",
+			byteSlice[8],
+		)
+	}
+
+	for _, idx := range getBoolIndices() {
+		if !zeroOrOne(byteSlice[idx]) {
+			return nil, fmt.Errorf(
+				"metadata: invalid boolean byte: %d",
+				byteSlice[idx],
+			)
+		}
+	}
+
 	return &Metadata{
 		length:           util.BytesToUint64(byteSlice[0:8]),
 		lsbUsed:          byteSlice[8],
@@ -160,3 +176,11 @@ func MetadataFromImageData(imageData util.ImageData) (*Metadata, error) {
 
 	return MetadataFromBinaryBuffer(binaryBuffer)
 }
+
+func getBoolIndices() []byte {
+	return []byte{9, 10, 11, 12}
+}
+
+func zeroOrOne(b byte) bool {
+	return b == 0 || b == 1
+}