1 files changed, 97 insertions, 0 deletions
diff --git a/pkg/validator/validator.go b/pkg/validator/validator.go
new file mode 100644
index 000000000..420830835
--- /dev/null
+++ b/pkg/validator/validator.go
@@ -0,0 +1,97 @@
+// Copyright 2024 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package validator
+
+import (
+	"errors"
+	"fmt"
+	"regexp"
+
+	"github.com/google/syzkaller/pkg/auth"
+)
+
+type Result struct {
+	Ok  bool
+	Err error
+}
+
+var ResultOk = Result{true, nil}
+
+func AnyError(errPrefix string, results ...Result) error {
+	for _, res := range results {
+		if !res.Ok {
+			return wrapError(res.Err.Error(), errPrefix)
+		}
+	}
+	return nil
+}
+
+func AnyOk(results ...Result) Result {
+	if len(results) == 0 {
+		return ResultOk
+	}
+	for _, res := range results {
+		if res.Ok {
+			return ResultOk
+		}
+	}
+	return results[0]
+}
+
+func PanicIfNot(results ...Result) error {
+	if err := AnyError("", results...); err != nil {
+		panic(err.Error())
+	}
+	return nil
+}
+
+var (
+	EmptyStr       = makeStrLenFunc("not empty", 0)
+	AlphaNumeric   = makeStrReFunc("not an alphanum", "^[a-zA-Z0-9]*$")
+	CommitHash     = makeCombinedStrFunc("not a hash", AlphaNumeric, makeStrLenFunc("len is not 40", 40))
+	KernelFilePath = makeStrReFunc("not a kernel file path", "^[./_a-zA-Z0-9]*$")
+	NamespaceName  = makeStrReFunc("not a namespace name", "^[a-zA-Z0-9-_.]{4,32}$")
+	DashClientName = makeStrReFunc("not a dashboard client name", "^[a-zA-Z0-9-_.]{4,100}$")
+	DashClientKey  = makeStrReFunc("not a dashboard client key",
+		"^([a-zA-Z0-9]{16,128})|("+regexp.QuoteMeta(auth.OauthMagic)+".*)$")
+)
+
+type strValidationFunc func(string, ...string) Result
+
+func makeStrReFunc(errStr, reStr string) strValidationFunc {
+	matchRe := regexp.MustCompile(reStr)
+	return func(s string, objName ...string) Result {
+		if !matchRe.MatchString(s) {
+			return Result{false, wrapError(errStr, objName...)}
+		}
+		return ResultOk
+	}
+}
+
+func makeStrLenFunc(errStr string, l int) strValidationFunc {
+	return func(s string, objName ...string) Result {
+		if len(s) != l {
+			return Result{false, wrapError(errStr, objName...)}
+		}
+		return ResultOk
+	}
+}
+
+func makeCombinedStrFunc(errStr string, funcs ...strValidationFunc) strValidationFunc {
+	return func(s string, objName ...string) Result {
+		for _, f := range funcs {
+			if res := f(s); !res.Ok {
+				return Result{false, wrapError(fmt.Sprintf(errStr+": %s", res.Err.Error()), objName...)}
+			}
+		}
+		return ResultOk
+	}
+}
+
+func wrapError(errStr string, prefix ...string) error {
+	if len(prefix) > 0 && prefix[0] != "" {
+		return fmt.Errorf("%s: %s", prefix[0], errStr)
+	}
+	return errors.New(errStr)
+}