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📄️Working with PKCS#12 files

12 files

📄️S/MIME signature verification

Verify a signed email: split the multipart/signed message into the signed part and its detached CMS signature, check the signature, and check that the signer's certificate chains up to a root you trust.

📄️S/MIME encryption

Encrypt an email for a recipient's certificate: wrap the message in a MIME entity, encrypt it as CMS EnvelopedData, and put it in an application/pkcs7-mime message. Then decrypt it as the recipient. Edit the message below, run the example, and download the encrypted .eml file.

📄️How to verify a signature in a PDF file

Verify the signatures of a signed PDF without a PDF library: each signature dictionary has a /ByteRange listing the bytes it covers and a /Contents holding a detached CMS signature. The example checks each signature, whether it covers the whole file, and whether its certificate chains up to a root you trust.