generator.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"errors"
+	"fmt"
+	"math"
 	"reflect"
 	"unsafe"
 )
@@ -10,6 +12,8 @@ type Generator struct {
 	data     	[]byte
 	dataSize 	uint32
 	position 	uint32
+	mapStruct   map[string]interface{}
+	arrayStruct []interface{}
 }
 
 func NewGenerator(fuzzData []byte) *Generator {
@@ -43,6 +47,79 @@ func (g *Generator) fillAny(any reflect.Value) error {
 			return err
 		}
 
+	case reflect.String:
+		str, err := g.GenerateString()
+		if err != nil {
+			return err
+		}
+		any.SetString(str)
+
+	case reflect.Float32:
+		newFloat, err := g.GenerateFloat32()
+		if err != nil {
+			return err
+		}
+		any.SetFloat(float64(newFloat))
+
+	case reflect.Float64:
+		newFloat, err := g.GenerateFloat64()
+		if err != nil {
+			return err
+		}
+		any.SetFloat(float64(newFloat))
+
+	case reflect.Complex64:
+		newFloatReal, err := g.GenerateFloat32()
+		if err != nil {
+			return err
+		}
+		newFloatImag, err := g.GenerateFloat32()
+		if err != nil {
+			return err
+		}
+		any.SetComplex(complex(float64(newFloatReal), float64(newFloatImag)))
+
+	case reflect.Complex128:
+		newFloatReal, err := g.GenerateFloat64()
+		if err != nil {
+			return err
+		}
+		newFloatImag, err := g.GenerateFloat64()
+		if err != nil {
+			return err
+		}
+		any.SetComplex(complex(newFloatReal, newFloatImag))
+
+	case reflect.Map:
+		any.Set(reflect.MakeMap(any.Type()))
+
+		mapLen, err := g.GenerateUInt32()
+		if err != nil {
+			return err
+		}
+
+		for i := uint32(0); i < mapLen; i++ {
+			key := fmt.Sprintf("key%d", i)
+			mapValue := reflect.New(any.Type().Elem())
+			err := g.fillAny(mapValue.Elem())
+			if err != nil {
+				return err
+			}
+			any.SetMapIndex(reflect.ValueOf(key), mapValue.Elem())
+		}
+
+	case reflect.Array:
+		any.Set(reflect.New(any.Type()).Elem())
+		arrayLen := any.Len()
+		for i := 0; i < arrayLen; i++ {
+			arrayValue := reflect.New(any.Type().Elem())
+			err := g.fillAny(arrayValue.Elem())
+			if err != nil {
+				return err
+			}
+			any.Index(i).Set(arrayValue.Elem())
+		}
+
 	case reflect.Bool:
 		newBool, err := g.GenerateBool()
 		if err != nil {
@@ -135,6 +212,86 @@ func (g *Generator) GenerateInt() (int, error) {
 	return result, nil
 }
 
+func (g *Generator) GenerateUInt32() (uint32, error) {
+	if g.position+3 >= g.dataSize {
+		return 0, errors.New("the data bytes are over")
+	}
+	result := uint32(0)
+	for i := 0; i < 4; i++ {
+		result = result<<8 | uint32(g.data[g.position])
+		g.position++
+	}
+	return result, nil
+}
+
+func (g *Generator) GenerateString() (string, error) {
+	maxStrLength := uint32(2000000)
+
+	if g.position >= g.dataSize {
+		return "nil", errors.New("the data bytes are over")
+	}
+
+	length, err := g.GenerateUInt32()
+	if err != nil {
+		return "nil", errors.New("the data bytes are over")
+	}
+
+	if g.position > maxStrLength {
+		return "nil", errors.New("the string length too large")
+	}
+
+	startBytePos := g.position
+	if startBytePos >= g.dataSize {
+		return "nil", errors.New("the data bytes are over")
+	}
+
+	if startBytePos+length > g.dataSize {
+		return "nil", errors.New("the data bytes are over")
+	}
+
+	if startBytePos > startBytePos+length {
+		return "nil", errors.New("overflow")
+	}
+
+	g.position = startBytePos + length
+	result := string(g.data[startBytePos:g.position])
+
+	return result, nil
+}
+
+func (g *Generator) GenerateFloat32() (float32, error) {
+	if g.position+3 >= g.dataSize {
+		return 0, errors.New("the data bytes are over")
+	}
+
+	bits := uint32(0)
+	for i := 0; i < 4; i++ {
+		bits = bits<<8 | uint32(g.data[g.position])
+		g.position++
+	}
+
+	floatBits := uint32(math.Float32bits(math.Float32frombits(bits)))
+	result := math.Float32frombits(floatBits)
+
+	return result, nil
+}
+
+func (g *Generator) GenerateFloat64() (float64, error) {
+	if g.position+7 >= g.dataSize {
+		return 0, errors.New("the data bytes are over")
+	}
+
+	bits := uint64(0)
+	for i := 0; i < 8; i++ {
+		bits = bits<<8 | uint64(g.data[g.position])
+		g.position++
+	}
+
+	result := math.Float64frombits(bits)
+
+	return result, nil
+}
+
 func (g *Generator) GenerateBool() (bool, error) {
 	if g.position >= g.dataSize {
 		return false, errors.New("the data bytes are over")
@@ -165,18 +322,6 @@ func (g *Generator) GenerateUInt16() (uint16, error) {
 	return result, nil
 }
 
-func (g *Generator) GenerateUInt32() (uint32, error) {
-	if g.position+3 >= g.dataSize {
-		return 0, errors.New("the data bytes are over")
-	}
-	result := uint32(0)
-	for i := 0; i < 4; i++ {
-		result = result<<8 | uint32(g.data[g.position])
-		g.position++
-	}
-	return result, nil
-}
-
 func (g *Generator) GenerateUInt64() (uint64, error) {
 	if g.position+7 >= g.dataSize {
 		return 0, errors.New("the data bytes are over")

main.go

@@ -13,6 +13,19 @@ type Struct2 struct {
 	Field2 Struct1
 }
 
+type Struct3 struct {
+	Field1 string
+	Field2 float32
+	Field3 float64
+	Field4 complex64
+	Field5 complex128
+}
+
+type Struct4 struct {
+	Field1 [5]int
+	Field2 map[string]int
+}
+
 func main() {
 
 }