| Horde_Pgp | A framework to interact with the OpenPGP standard (RFC 4880). |
| Horde_Pgp_Armor | Parse PGP armored text data. |
| Horde_Pgp_Backend | Abstract backend class to implement PGP functionality. |
| Horde_Pgp_Backend_Openpgp | PGP backend that uses the openpgp-php library. |
| Horde_Pgp_Crypt_Cast128 | CAST5 (RFC 2144) implementation, using OpenSSL, sufficient to do encryption/decryption for purposes of OpenPGP_Crypt_Symmetric. |
| Horde_Pgp_Crypt_DSA | DSA (Digital Signature Algorithm) implementation. |
| Horde_Pgp_Crypt_Elgamal | Elgamal encryption implementation (w/EME-PKCS1-v1_5 block encoding). |
| Horde_Pgp_Element | Abstract class representing a PGP data element. |
| Horde_Pgp_Element_Key | Abstract class representing a PGP key. |
| Horde_Pgp_Element_Message | PGP element: signed, encrypted, or compressed file. |
| Horde_Pgp_Element_PrivateKey | PGP element: private key. |
| Horde_Pgp_Element_PublicKey | PGP element: public key. |
| Horde_Pgp_Element_Signature | PGP element: signatures. |
| Horde_Pgp_Element_SignedMessage | PGP armor part: signed message. |
| Horde_Pgp_Element_Text | Non-armored text (i.e. literal data) appearing in PGP armored data. |
| Horde_Pgp_Exception | Base exception class for the Horde_Pgp package. |
| Horde_Pgp_Keyserver | Provides methods to connect to a PGP keyserver. |
| Horde_Pgp_Mime | Extend the PGP object to produce MIME PGP data (RFC 3156). |
| Horde_Pgp_Translation | Translation wrapper class for Horde_Pgp. |