cluade code review changes

crypto/ed25519.go

@@ -65,7 +65,7 @@ func ParseEdPrivateKey(d []byte) (ed25519.PrivateKey, error) {
 	case ed25519.PrivateKey:
 		return pub, nil
 	default:
-		return nil, errors.New("key type is not RSA")
+		return nil, errors.New("key type is not Ed25519")
 	}
 
 }
@@ -99,6 +99,6 @@ func ParseEdPublicKey(d []byte) (ed25519.PublicKey, error) {
 	case ed25519.PublicKey:
 		return pub, nil
 	default:
-		return nil, errors.New("key type is not RSA")
+		return nil, errors.New("key type is not Ed25519")
 	}
 }

date/date.go

@@ -39,7 +39,7 @@ func StartOfDay(date time.Time) time.Time {
 
 func EndOfDay(date time.Time) time.Time {
 	year, month, day := date.Date()
-	return time.Date(year, month, day, 23, 59, 59, 0, date.Location())
+	return time.Date(year, month, day, 23, 59, 59, 999999999, date.Location())
 }
 
 func StartOfMonth(date time.Time) time.Time {

dotenv/parser.go

@@ -255,7 +255,7 @@ func isLineEnd(r rune) bool {
 
 var (
 	escapeRegex        = regexp.MustCompile(`\\.`)
-	expandVarRegex     = regexp.MustCompile(`(\\)?(\$)(\()?\{?([A-Z0-9_]+)?\}?`)
+	expandVarRegex     = regexp.MustCompile(`(\\)?(\$)(\()?\{?([A-Za-z0-9_]+)?\}?`)
 	unescapeCharsRegex = regexp.MustCompile(`\\([^$])`)
 )
 

dotenv/write.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"os"
 	"sort"
-	"strconv"
 	"strings"
 )
 
@@ -20,7 +19,7 @@ func Write(envMap map[string]string, filename string) error {
 	if err != nil {
 		return err
 	}
-	file, err := os.Create(filename)
+	file, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
 	if err != nil {
 		return err
 	}
@@ -37,12 +36,8 @@ func Write(envMap map[string]string, filename string) error {
 func marshal(envMap map[string]string) (string, error) {
 	lines := make([]string, 0, len(envMap))
 	for k, v := range envMap {
-		if d, err := strconv.Atoi(v); err == nil {
-			lines = append(lines, fmt.Sprintf(`%s=%d`, k, d))
-		} else {
 		lines = append(lines, fmt.Sprintf(`%s="%s"`, k, doubleQuoteEscape(v)))
 	}
-	}
 	sort.Strings(lines)
 	return strings.Join(lines, "\n"), nil
 }

email/gomail/send.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"net/mail"
+	"slices"
 )
 
 // Sender is the interface that wraps the Send method.

email/transport_dump.go

@@ -1,6 +1,7 @@
 package email
 
 import (
+	"fmt"
 	"os"
 	"path/filepath"
 
@@ -19,7 +20,10 @@ func (DumpToTemp) Send(msg *Message) error {
 	}
 
 	dir := os.TempDir()
-	id, _ := uuid.NewV7()
+	id, err := uuid.NewV7()
+	if err != nil {
+		return fmt.Errorf("email: failed to generate UUID: %w", err)
+	}
 	file := filepath.Join(dir, id.String()+".html")
 
 	if err := os.WriteFile(file, []byte(msg.HtmlBody), 0440); err != nil {

email/transport_smtp.go

@@ -87,6 +87,6 @@ func (t SMTP) Send(msg *Message) error {
 		return err
 	}
 
-	slog.Info("sent email %s" + msg.Subject)
+	slog.Info("sent email", slog.String("subject", msg.Subject))
 	return nil
 }

gz/gz.go

@@ -8,8 +8,14 @@ package gz
 import (
 	"bytes"
 	"compress/gzip"
+	"errors"
+	"io"
 )
 
+// MaxDecompressedSize is the maximum allowed size for decompressed data (256MB).
+// This prevents decompression bomb attacks. Override if you need larger outputs.
+var MaxDecompressedSize int64 = 256 << 20
+
 func Zip(data []byte) ([]byte, error) {
 	var b bytes.Buffer
 	gz := gzip.NewWriter(&b)
@@ -37,9 +43,13 @@ func UnZip(data []byte) ([]byte, error) {
 	defer r.Close() // Ensure reader is closed to prevent resource leak
 
 	var resB bytes.Buffer
-	if _, err := resB.ReadFrom(r); err != nil {
+	if _, err := io.Copy(&resB, io.LimitReader(r, MaxDecompressedSize+1)); err != nil {
 		return nil, err
 	}
 
+	if int64(resB.Len()) > MaxDecompressedSize {
+		return nil, errors.New("gz: decompressed data exceeds maximum allowed size")
+	}
+
 	return resB.Bytes(), nil
 }

jwt/jwt.go

@@ -28,13 +28,14 @@ func Parse(key ed25519.PrivateKey, tokenString string, issuer string) (jwt.MapCl
 // SignEdDSA (Edwards-curve Digital Signature Algorithm, typically Ed25519) is an excellent,
 // modern choice for JWT signing—arguably safer and more efficient than both HS256 and traditional RSA/ECDSA.
 func SignEdDSA(key ed25519.PrivateKey, claims map[string]any, issuer string, d time.Duration) (string, error) {
-	cl := jwt.MapClaims{
-		"iss": issuer,
-		"iat": jwt.NewNumericDate(time.Now().UTC()),
-		"exp": jwt.NewNumericDate(time.Now().Add(d)),
-	}
+	cl := jwt.MapClaims{}
 	maps.Copy(cl, claims)
 
+	// Set standard claims after user claims to prevent override
+	cl["iss"] = issuer
+	cl["iat"] = jwt.NewNumericDate(time.Now().UTC())
+	cl["exp"] = jwt.NewNumericDate(time.Now().Add(d))
+
 	t := jwt.NewWithClaims(jwt.SigningMethodEdDSA, cl)
 	return t.SignedString(key)
 }
@@ -61,13 +62,14 @@ func ParseEdDSA(key ed25519.PrivateKey, tokenString string, issuer string) (jwt.
 }
 
 func SignHS256(secret []byte, claims map[string]any, issuer string, d time.Duration) (string, error) {
-	cl := jwt.MapClaims{
-		"iss": issuer,
-		"iat": jwt.NewNumericDate(time.Now().UTC()),
-		"exp": jwt.NewNumericDate(time.Now().Add(d)),
-	}
+	cl := jwt.MapClaims{}
 	maps.Copy(cl, claims)
 
+	// Set standard claims after user claims to prevent override
+	cl["iss"] = issuer
+	cl["iat"] = jwt.NewNumericDate(time.Now().UTC())
+	cl["exp"] = jwt.NewNumericDate(time.Now().Add(d))
+
 	t := jwt.NewWithClaims(jwt.SigningMethodHS256, cl)
 	return t.SignedString(secret)
 }
@@ -102,10 +104,12 @@ func ParseHS256(secret []byte, tokenString string, issuer string) (jwt.MapClaims
 func SignES256(
 	key *ecdsa.PrivateKey, issuer, audience, subject string, d time.Duration, claims map[string]any,
 ) (string, error) {
-	cl := jwt.MapClaims{
-		"iat": jwt.NewNumericDate(time.Now().UTC()),
-		"exp": jwt.NewNumericDate(time.Now().Add(d)),
-	}
+	cl := jwt.MapClaims{}
+	maps.Copy(cl, claims)
+
+	// Set standard claims after user claims to prevent override
+	cl["iat"] = jwt.NewNumericDate(time.Now().UTC())
+	cl["exp"] = jwt.NewNumericDate(time.Now().Add(d))
 
 	if issuer != "" {
 		cl["iss"] = issuer
@@ -119,8 +123,6 @@ func SignES256(
 		cl["sub"] = subject
 	}
 
-	maps.Copy(cl, claims)
-
 	t := jwt.NewWithClaims(jwt.SigningMethodES256, cl)
 	return t.SignedString(key)
 }

open/open_windows.go

@@ -18,7 +18,7 @@ func cleaninput(input string) string {
 }
 
 func open(input string) *exec.Cmd {
-	cmd := exec.Command(runDll32, cmd, input)
+	cmd := exec.Command(runDll32, cmd, cleaninput(input))
 	// cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
 	return cmd
 }

request/pager.go

@@ -13,6 +13,9 @@ import (
 	"code.patial.tech/go/appcore/ptr"
 )
 
+// MaxPageSize is the maximum allowed page size to prevent resource exhaustion.
+var MaxPageSize = 1000
+
 type Pager struct {
 	OrderBy  *string `json:"orderBy"`
 	OrderAsc *bool   `json:"orderAsc"`
@@ -39,7 +42,9 @@ func (i *Pager) Offset() int {
 		return 0
 	}
 
-	return (i.Page - 1) * i.Limit()
+	page := max(i.Page, 1)
+
+	return (page - 1) * i.Limit()
 }
 
 func (i *Pager) Limit() int {
@@ -63,14 +68,17 @@ func GetPager(r *http.Request) Pager {
 	}
 
 	if v := r.URL.Query().Get("pg"); v != "" {
-		if vv, err := strconv.Atoi(v); err == nil {
-			p.Page = int(vv)
+		if vv, err := strconv.Atoi(v); err == nil && vv > 0 {
+			p.Page = vv
 		}
 	}
 
 	if v := r.URL.Query().Get("pg_s"); v != "" {
-		if vv, err := strconv.Atoi(v); err == nil {
-			p.Size = int(vv)
+		if vv, err := strconv.Atoi(v); err == nil && vv > 0 {
+			if vv > MaxPageSize {
+				vv = MaxPageSize
+			}
+			p.Size = vv
 		}
 	}
 

request/payload.go

@@ -15,10 +15,10 @@ import (
 	"code.patial.tech/go/appcore/validate"
 )
 
-// MaxRequestBodySize is the maximum allowed size for request bodies (1MB default).
+// MaxRequestBodySize is the maximum allowed size for request bodies (5MB default).
 // This prevents resource exhaustion attacks from large payloads.
 // Override this value if you need to accept larger requests.
-var MaxRequestBodySize int64 = 1 << 20 // 1MB
+var MaxRequestBodySize int64 = 5 << 20 // 5MB
 
 func FormField(r *http.Request, key string) (string, error) {
 	f, err := Payload[map[string]any](r)
@@ -49,22 +49,24 @@ func PayloadWithValidate[T any](r *http.Request) (T, error) {
 func Payload[T any](r *http.Request) (T, error) {
 	var p T
 
+	if r.ContentLength > MaxRequestBodySize {
+		return p, errors.New("request body too large")
+	}
+
 	// Limit request body size to prevent resource exhaustion
-	limited := io.LimitReader(r.Body, MaxRequestBodySize)
+	limited := io.LimitReader(r.Body, MaxRequestBodySize+1)
 
 	decoder := json.NewDecoder(limited)
 	if err := decoder.Decode(&p); err != nil {
-		// Check if we hit the size limit
-		if err == io.EOF || err == io.ErrUnexpectedEOF {
-			// Try to read one more byte to see if there's more data
-			var buf [1]byte
-			if n, _ := limited.Read(buf[:]); n == 0 {
-				// We hit the limit
-				return p, errors.New("request body too large")
-			}
-		}
 		return p, err
 	}
+
+	// Check if there's more data beyond the limit
+	var buf [1]byte
+	if n, _ := limited.Read(buf[:]); n > 0 {
+		return p, errors.New("request body too large")
+	}
+
 	return p, nil
 }
 
@@ -72,21 +74,23 @@ func Payload[T any](r *http.Request) (T, error) {
 // This is useful when you want to decode into an existing variable.
 // The request body size is limited by MaxRequestBodySize to prevent DoS attacks.
 func DecodeJSON(r *http.Request, v any) error {
+	if r.ContentLength > MaxRequestBodySize {
+		return errors.New("request body too large")
+	}
+
 	// Limit request body size to prevent resource exhaustion
-	limited := io.LimitReader(r.Body, MaxRequestBodySize)
+	limited := io.LimitReader(r.Body, MaxRequestBodySize+1)
 
 	decoder := json.NewDecoder(limited)
 	if err := decoder.Decode(v); err != nil {
-		// Check if we hit the size limit
-		if err == io.EOF || err == io.ErrUnexpectedEOF {
-			// Try to read one more byte to see if there's more data
-			var buf [1]byte
-			if n, _ := limited.Read(buf[:]); n == 0 {
-				// We hit the limit
-				return errors.New("request body too large")
-			}
-		}
 		return err
 	}
+
+	// Check if there's more data beyond the limit
+	var buf [1]byte
+	if n, _ := limited.Read(buf[:]); n > 0 {
+		return errors.New("request body too large")
+	}
+
 	return nil
 }

request/query.go

@@ -35,10 +35,21 @@ func NumberParam[T Number](r *http.Request, key string) (T, error) {
 		return T(n), nil
 	}
 
-	// int param
+	// unsigned int param
+	if k >= reflect.Uint && k <= reflect.Uint64 {
+		n, err := strconv.ParseUint(p, 10, 64)
+		if err != nil {
+			return noop, fmt.Errorf("query param: %q is not a valid unsigned integer", key)
+		}
+
+		return T(n), nil
+	}
+
+	// signed int param
 	n, err := strconv.ParseInt(p, 10, 64)
 	if err != nil {
 		return noop, fmt.Errorf("query param: %q is not a valid integer", key)
 	}
+
 	return T(n), nil
 }

response/reply.go

@@ -59,10 +59,12 @@ func reply(w http.ResponseWriter, data any, p *request.Pager) {
 
 	// json data...
 	w.WriteHeader(http.StatusOK)
-	json.NewEncoder(w).Encode(Detail{
+	if err := json.NewEncoder(w).Encode(Detail{
 		Data:  data,
 		Pager: p,
-	})
+	}); err != nil {
+		slog.Error(err.Error())
+	}
 }
 
 func BadRequest(w http.ResponseWriter, err error) {
@@ -92,9 +94,14 @@ func SessionExpired(w http.ResponseWriter) {
 	}
 }
 
+// Deprecated: Use NotAuthorized instead.
 func NotAutorized(w http.ResponseWriter) {
+	NotAuthorized(w)
+}
+
+func NotAuthorized(w http.ResponseWriter) {
 	w.Header().Set("Content-Type", "application/json")
-	w.WriteHeader(http.StatusBadRequest)
+	w.WriteHeader(http.StatusForbidden)
 	_, writeErr := fmt.Fprint(w, "{\"error\": \"You are not authorized to perform this action\"}")
 	if writeErr != nil {
 		slog.Error(writeErr.Error())

structs/structs.go

@@ -20,13 +20,21 @@ func Map(obj any) map[string]any {
 
 	for i := range val.NumField() {
 		fieldName := typ.Field(i).Name
-		fieldValueKind := val.Field(i).Kind()
+		field := val.Field(i)
+		fieldValueKind := field.Kind()
 		var fieldValue any
 
-		if fieldValueKind == reflect.Struct {
-			fieldValue = Map(val.Field(i).Interface())
+		switch fieldValueKind {
+		case reflect.Struct:
+			fieldValue = Map(field.Interface())
+		case reflect.Pointer:
+			if !field.IsNil() && field.Elem().Kind() == reflect.Struct {
+				fieldValue = Map(field.Elem().Interface())
 			} else {
-			fieldValue = val.Field(i).Interface()
+				fieldValue = field.Interface()
+			}
+		default:
+			fieldValue = field.Interface()
 		}
 
 		result[fieldName] = fieldValue

uid/sqid.go

@@ -5,15 +5,45 @@
 
 package uid
 
-import "github.com/sqids/sqids-go"
+import (
+	"sync"
+
+	"github.com/sqids/sqids-go"
+)
 
 type Service interface {
 	SquiOptions() sqids.Options
 }
 
+var (
+	mu       sync.Mutex
+	sqidInst *sqids.Sqids
+	sqidOpts *sqids.Options
+)
+
+func getSqids(svc Service) (*sqids.Sqids, error) {
+	opts := svc.SquiOptions()
+
+	mu.Lock()
+	defer mu.Unlock()
+
+	if sqidInst != nil && sqidOpts != nil && opts.Alphabet == sqidOpts.Alphabet && opts.MinLength == sqidOpts.MinLength {
+		return sqidInst, nil
+	}
+
+	s, err := sqids.New(opts)
+	if err != nil {
+		return nil, err
+	}
+
+	sqidInst = s
+	sqidOpts = &opts
+	return s, nil
+}
+
 // Encode a slice of IDs into one unique ID
 func Encode(svc Service, ids ...uint64) (string, error) {
-	s, err := sqids.New(svc.SquiOptions())
+	s, err := getSqids(svc)
 	if err != nil {
 		return "", err
 	}
@@ -23,7 +53,7 @@ func Encode(svc Service, ids ...uint64) (string, error) {
 
 // Decode an ID back to slice of IDs
 func Decode(svc Service, id string) ([]uint64, error) {
-	s, err := sqids.New(svc.SquiOptions())
+	s, err := getSqids(svc)
 	if err != nil {
 		return nil, err
 	}