PDF认证无效：“；文件自签署以来已被更改或损坏；
我正在为我的应用程序执行PDF签名功能。以下是工作流程：PDF认证无效：“；文件自签署以来已被更改或损坏；,pdf,digital-signature,zend-pdf,Pdf,Digital Signature,Zend Pdf,我正在为我的应用程序执行PDF签名功能。以下是工作流程： PDF存储在服务器上 我将所有必需的签名字段包含到文件中，并使用ZendPDF的扩展名FaritPDF计算byterange等 我使用SHA256根据计算出的ByteRange计算哈希 散列将被发送到客户端 客户端使用PFX文件对哈希进行签名，并创建包含该哈希的PKCS7对象 PKCS7对象被发送到服务器 PDF中包含PKCS7对象，并呈现PDF 这导致我出现以下错误：“文档自签名后已被更改或损坏”。 ByteRange是正确的，我没有修
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