python如何对pdf文件进行签名防止篡改？
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生成数字证书并设置密码
# generate new .crt file, it's contained certificate & private key openssl req -x509 -nodes -days 365000 -newkey rsa:1024 -keyout filename.crt -out filename.crt # convert .crt to binar .p12 file openssl pkcs12 -export -in tcpdf.crt -out filename.p...
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by thinkfuture
我知道答案，我要回答
私活外包
