PdfFileSignature 类

准备 PDF 数字签名助手

在对 PDF 应用数字签名之前，最佳实践是设置一组可重用的辅助函数。这些函数封装了常见任务——例如初始化签名处理程序、定义签名的可视位置以及配置基于证书的签名——从而使您的主要签名逻辑保持简洁、一致且易于维护。

此设置实现的目标

此辅助层准备了顺畅签名工作流所需的一切：

初始化 PdfFileSignature 对象并将其绑定到文档
定义签名在页面上的显示位置
加载并应用签名证书
创建带有元数据的可重用 PKCS#7 签名对象
自定义签名的视觉外观

import aspose.pdf as ap
import aspose.pdf.facades as pdf_facades
import aspose.pydrawing as apd


DEFAULT_CERTIFICATE_PASSWORD = "Aspose2021"
DEFAULT_SIGNATURE_NAME = "Signature1"


def create_pdf_file_signature(infile):
    pdf_signature = pdf_facades.PdfFileSignature()
    pdf_signature.bind_pdf(infile)
    return pdf_signature


def create_signature_rectangle():
    return apd.Rectangle(10, 10, 200, 60)


def configure_signature_certificate(
    pdf_signature, certificate_path, certificate_password=DEFAULT_CERTIFICATE_PASSWORD
):
    pdf_signature.set_certificate(certificate_path, certificate_password)


def create_pkcs7_signature(
    certificate_path, certificate_password=DEFAULT_CERTIFICATE_PASSWORD
):
    signature = ap.forms.PKCS7(certificate_path, certificate_password)
    signature.reason = "Document approval"
    signature.contact_info = "qa@example.com"
    signature.location = "New York, USA"
    signature.authority = "Aspose.PDF Example"
    return signature


def create_custom_signature_appearance():
    appearance = ap.forms.SignatureCustomAppearance()
    appearance.font_family_name = "Arial"
    appearance.font_size = 10
    appearance.show_contact_info = True
    appearance.show_location = True
    appearance.show_reason = True
    return appearance

PdfAnnotationEditor 类 FormEditor 类