Python实现加密、保护和签名PowerPoint(PPT)演示文稿

pip install Spire.Presentation

from spire.presentation import *
from spire.presentation.common import *

# 创建 Presentation 对象
presentation = Presentation()

# 加载 PowerPoint 文件
presentation.LoadFromFile("quarterly_report.pptx")

# 使用打开密码加密演示文稿
password = "YourPassword123"
presentation.Encrypt(password)

# 保存加密后的演示文稿
presentation.SaveToFile("encrypted_report.pptx", FileFormat.Pptx2013)

# 释放资源
presentation.Dispose()

print("The PowerPoint presentation has been encrypted.")

from spire.presentation import *
from spire.presentation.common import *

# 创建 Presentation 对象
presentation = Presentation()

# 使用正确密码加载已加密的 PowerPoint 文件
password = "YourPassword123"
presentation.LoadFromFile("encrypted_report.pptx", password)

# 加载完成后，可以正常处理演示文稿
# 例如，可以修改幻灯片、添加内容或转换文件格式

# 保存处理后的演示文稿
presentation.SaveToFile("modified_report.pptx", FileFormat.Pptx2013)

# 释放资源
presentation.Dispose()

print("The encrypted PowerPoint file has been opened and saved.")

from spire.presentation import *
from spire.presentation.common import *

# 创建 Presentation 对象
presentation = Presentation()

# 使用旧密码加载演示文稿
old_password = "Old@Pass123"
presentation.LoadFromFile("report.pptx", old_password)

# 移除旧加密
presentation.RemoveEncryption()

# 应用新密码
new_password = "New@Pass456"
presentation.Encrypt(new_password)

# 使用新密码保存演示文稿
presentation.SaveToFile("report_new_password.pptx", FileFormat.Pptx2013)

# 释放资源
presentation.Dispose()

print("The PowerPoint password has been changed.")

from spire.presentation import *
from spire.presentation.common import *

# 创建 Presentation 对象
presentation = Presentation()

# 使用原密码加载已加密的演示文稿
presentation.LoadFromFile("encrypted_report.pptx", "YourPassword123")

# 移除加密
presentation.RemoveEncryption()

# 保存为无密码保护的演示文稿
presentation.SaveToFile("unencrypted_report.pptx", FileFormat.Pptx2013)

# 释放资源
presentation.Dispose()

print("Password protection has been removed from the presentation.")

from spire.presentation import *
from spire.presentation.common import *

# 创建 Presentation 对象
presentation = Presentation()

# 加载 PowerPoint 文件
presentation.LoadFromFile("product_intro.pptx")

# 设置只读保护密码
read_only_password = "View@Only"
presentation.Protect(read_only_password)

# 保存受保护的演示文稿
presentation.SaveToFile("readonly_intro.pptx", FileFormat.Pptx2013)

# 释放资源
presentation.Dispose()

print("The PowerPoint presentation has been set as read-only.")

from spire.presentation import *
from spire.presentation.common import *
from datetime import datetime

# 创建 Presentation 对象
presentation = Presentation()

# 加载 PowerPoint 文件
presentation.LoadFromFile("contract_terms.pptx")

# 证书文件和密码
cert_file = "company_certificate.pfx"
cert_password = "YourCertificatePassword"

# 签署者名称
signer_name = "John Smith"

# 添加数字签名
presentation.AddDigitalSignature(
    cert_file,
    cert_password,
    signer_name,
    datetime.now()
)

# 保存已签名的演示文稿
presentation.SaveToFile("signed_contract.pptx", FileFormat.Pptx2013)

# 释放资源
presentation.Dispose()

print("A digital signature has been added to the presentation.")

from spire.presentation import *

# 创建 Presentation 对象
presentation = Presentation()

# 加载 PowerPoint 文件
presentation.LoadFromFile("received_document.pptx")

# 检查演示文稿是否包含数字签名
if presentation.IsDigitallySigned():
    print("This PowerPoint presentation contains a digital signature.")
else:
    print("This PowerPoint presentation is not digitally signed.")

# 释放资源
presentation.Dispose()

from spire.presentation import *
from spire.presentation.common import *

# 创建 Presentation 对象
presentation = Presentation()

# 加载已签名的 PowerPoint 文件
presentation.LoadFromFile("signed_document.pptx")

# 移除所有数字签名
presentation.RemoveAllDigitalSignatures()

# 保存未签名的演示文稿
presentation.SaveToFile("unsigned_document.pptx", FileFormat.Pptx2013)

# 释放资源
presentation.Dispose()

print("All digital signatures have been removed from the presentation.")