PGP sign, encrypt, check routines

Code to sign, encrypt, verify and decrypt PGP messages.

The code accepts messages in either the new PGP/MIME format, or in the older Application/Pgp format. It also contains some code to cache the user's passphrase for repeat use when decrypting or signing a message.

Functions

Function	Description	Links
key_parent()	Find a key's parent (if it's a subkey)
pgp_check_decryption_okay()	Check GPG output for status codes
pgp_check_pgp_decryption_okay_regex()	Check PGP output to look for successful outcome
pgp_check_traditional_one_body()	Check the body of an inline PGP message
pgp_class_application_handler()	Manage the MIME type "application/pgp" or "application/smime"	CryptModuleSpecs::application_handler(), crypto_application_handler
pgp_class_check_traditional()	Look for inline (non-MIME) PGP content	CryptModuleSpecs::pgp_check_traditional(), crypto_pgp_check_traditional
pgp_class_decrypt_mime()	Decrypt an encrypted MIME part	CryptModuleSpecs::decrypt_mime(), crypto_decrypt_mime
pgp_class_encrypt_message()	PGP encrypt an email	CryptModuleSpecs::pgp_encrypt_message(), crypto_pgp_encrypt_message
pgp_class_encrypted_handler()	Manage a PGP or S/MIME encrypted MIME part	CryptModuleSpecs::encrypted_handler(), crypto_encrypted_handler
pgp_class_extract_key_from_attachment()	Extract PGP key from an attachment	CryptModuleSpecs::pgp_extract_key_from_attachment(), crypto_pgp_extract_key_from_attachment
pgp_class_find_keys()	Find the keyids of the recipients of a message	CryptModuleSpecs::find_keys(), crypto_find_keys
pgp_class_send_menu()	Ask the user whether to sign and/or encrypt the email	CryptModuleSpecs::send_menu(), crypto_send_menu
pgp_class_sign_message()	Cryptographically sign the Body of a message	CryptModuleSpecs::sign_message(), crypto_sign_message
pgp_class_traditional_encryptsign()	Create an inline PGP encrypted, signed email	CryptModuleSpecs::pgp_traditional_encryptsign(), crypto_pgp_traditional_encryptsign
pgp_class_valid_passphrase()	Ensure we have a valid passphrase	CryptModuleSpecs::valid_passphrase(), crypto_valid_passphrase
pgp_class_verify_one()	Check a signed MIME part against a signature	CryptModuleSpecs::verify_one(), crypto_verify_one
pgp_class_void_passphrase()	Forget the cached passphrase	CryptModuleSpecs::void_passphrase(), crypto_void_passphrase
pgp_copy_checksig()	Copy PGP output and look for signs of a good signature
pgp_copy_clearsigned()	Copy a clearsigned message, stripping the signature
pgp_decrypt_part()	Decrypt part of a PGP message
pgp_extract_keys_from_attachment()	Extract pgp keys from messages/attachments
pgp_fingerprint()	Get the key's fingerprint
pgp_fpr_or_lkeyid()	Get the fingerprint or long keyid
pgp_keyid()	Get the ID of the main (parent) key
pgp_long_keyid()	Get a key's long id
pgp_short_keyid()	Get a key's short id
pgp_this_keyid()	Get the ID of this key
pgp_use_gpg_agent()	Does the user want to use the gpg agent?