f

internal/shared/validator/custom_validators.go

@@ -10,6 +10,8 @@ import (
 	"time"
 
 	"github.com/go-playground/validator/v10"
+
+	"hyapi-server/internal/shared/pdfvalidate"
 )
 
 // RegisterCustomValidators 注册所有自定义验证器
@@ -104,6 +106,9 @@ func RegisterCustomValidators(validate *validator.Validate) {
 	// Base64编码格式验证器
 	validate.RegisterValidation("base64", validateBase64)
 	validate.RegisterValidation("validBase64", validateBase64)
+
+	// 汇博授权 PDF Base64 验证器（解码后校验 PDF 魔数与大小上限）
+	validate.RegisterValidation("validAuthPDFBase64", validateAuthPDFBase64)
 }
 
 // validatePhone 手机号验证
@@ -1037,3 +1042,16 @@ func validateBase64(fl validator.FieldLevel) bool {
 	_, err := base64.StdEncoding.DecodeString(base64Str)
 	return err == nil
 }
+
+// validateAuthPDFBase64 汇博授权 PDF Base64 验证器
+func validateAuthPDFBase64(fl validator.FieldLevel) bool {
+	base64Str := strings.TrimSpace(fl.Field().String())
+	if base64Str == "" {
+		return true
+	}
+	raw, err := base64.StdEncoding.DecodeString(base64Str)
+	if err != nil {
+		return false
+	}
+	return pdfvalidate.ValidateDecodedPDFBinary(raw) == nil
+}