加密后我的 PDF 文本字段在 Chrome 和 Adobe Reader 中不可见，但在 Mozilla 和 X-Change Editor 中可见

Question

我创建了一个有效的 pdf，其中包含一个空白页和一个现有文本字段，一切都很好：

我可以编辑pdf并保存它，一切都很好。我用验证工具测试了pdf，pdf是有效的。 但是当我使用这些权限对其进行加密时：

const securityOptions = {
   ownerPassword: "azer",
   permissions: {
     printing: 'highResolution', //'lowResolution',
     modifying: true,
     copying: true,
     annotating: true,
     fillingForms: true,
     contentAccessibility: true,
     documentAssembly: true
   }
 };

并保存它，当我打开pdf时，文本字段出现问题： 文本字段在以下位置不可见：

• Adobe Reader。
• Chrome（以及所有 chromium 浏览器），当执行 ctrl+p 时，文本字段在打印查看器中可见。

文本字段可见，其值位于：

• Mozilla
• X-更改编辑器

我用验证工具测试了加密的pdf（https://www.pdf-online.com/osa/validate.aspx），pdf是有效的。

这是加密的PDF，可能是流或元数据加密有问题，我不确定：

作为base64

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%%EOF

未加密的PDF：

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我已经加密/解密了/AP，但它不起作用，这是解压缩的/AP：

0 0 0 RG 1 w
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/Tx BMC
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1 1 148 20 re W n
BT
0 g 0 Tc 0 Tw 100 Tz 0 Tr/Helv 17.9 Tf 2 4.7976 Td
(Hello SE)Tj
ET
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EMC

作为字节数组：

[120,218,21,201,49,10,194,64,16,64,209,126,78,241,75,109,54,51,33,113,77,155,176,152,38,133,102,192,3,104,20,36,40,166,48,226,233,101,155,207,131,175,40,202,233,128,177,74,168,9,53,86,53,148,198,50,49,74,225,95,218,161,147,183,24,134,85,123,74,205,231,204,83,90,23,229,142,226,151,156,21,83,197,127,217,75,209,79,243,7,139,161,193,111,148,84,33,54,113,135,95,101,211,79,243,252,98,76,91,127,72,114,57,74,26,58,249,3,199,34,30,154]

也许我对 /AP 进行了错误的编辑，也许是大小和外部参照，我更改了它们，我不知道我的加密中缺少什么

Answer 1

正如评论中已经指出的，PDF 声称是完全加密的，即字符串和流，但字符串实际上是没有加密的，而流（元数据和小部件外观）确实是加密的。因此，字段名称及其当前值等字符串无法解密。

因此，PDF 基本上已损坏。

不同的 PDF 处理器如何处理此问题取决于实现。一些查看者忽略了 PDF 的底层表单结构已损坏，并仍然显示小部件注释，一些查看者尝试在内部修复表单结构，同时显示原始小部件或从修复的值创建新小部件，还有一些人干脆不显示小部件注释。完全破坏表单结构的小部件。

我用验证工具测试了加密的pdf（https://www.pdf-online.com/osa/validate.aspx），pdf是有效的。

如果该工具确实测试您的 PDF 是否有效，那么我会对该工具的质量产生怀疑。