PGPy API

Exceptions

PGPError

exception pgpy.errors.PGPError

Raised as a general error in PGPy

PGPEncryptionError

exception pgpy.errors.PGPEncryptionError

Raised when encryption fails

PGPDecryptionError

exception pgpy.errors.PGPDecryptionError

Raised when decryption fails

PGPOpenSSLCipherNotSupportedError

exception pgpy.errors.PGPOpenSSLCipherNotSupportedError

Raised when OpenSSL does not support the requested cipher

PGPInsecureCipherError

exception pgpy.errors.PGPInsecureCipherError

Raised when a cipher known to be insecure is attempted to be used to encrypt data

WontImplementError

exception pgpy.errors.WontImplementError

Raised when something that is not implemented, will not be implemented

Constants

PubKeyAlgorithm

class pgpy.constants.PubKeyAlgorithm(value, names=<not given>, *values, module=None, qualname=None, type=None, start=1, boundary=None)

Supported public key algorithms.

RSAEncryptOrSign

Signifies that a key is an RSA key.

DSA

Signifies that a key is a DSA key.

ElGamal

Signifies that a key is an ElGamal key.

ECDH

Signifies that a key is an ECDH key.

ECDSA

Signifies that a key is an ECDSA key.

EllipticCurveOID

class pgpy.constants.EllipticCurveOID(value, names=<not given>, *values, module=None, qualname=None, type=None, start=1, boundary=None)

OIDs for supported elliptic curves.

Curve25519

DJB’s fast elliptic curve

Ed25519

Twisted Edwards variant of Curve25519

NIST_P256

NIST P-256, also known as SECG curve secp256r1

NIST_P384

NIST P-384, also known as SECG curve secp384r1

NIST_P521

NIST P-521, also known as SECG curve secp521r1

Brainpool_P256

Brainpool Standard Curve, 256-bit

Note

Requires OpenSSL >= 1.0.2

Brainpool_P384

Brainpool Standard Curve, 384-bit

Note

Requires OpenSSL >= 1.0.2

Brainpool_P512

Brainpool Standard Curve, 512-bit

Note

Requires OpenSSL >= 1.0.2

SECP256K1

SECG curve secp256k1

SymmetricKeyAlgorithm

class pgpy.constants.SymmetricKeyAlgorithm(value, names=<not given>, *values, module=None, qualname=None, type=None, start=1, boundary=None)

Supported symmetric key algorithms.

IDEA

Warning

IDEA is insecure. PGPy only allows it to be used for decryption, not encryption!

TripleDES

Triple-DES with 168-bit key derived from 192

CAST5

CAST5 (or CAST-128) with 128-bit key

Blowfish

Blowfish with 128-bit key and 16 rounds

AES128

AES with 128-bit key

AES192

AES with 192-bit key

AES256

AES with 256-bit key

Camellia128

Camellia with 128-bit key

Camellia192

Camellia with 192-bit key

Camellia256

Camellia with 256-bit key

CompressionAlgorithm

class pgpy.constants.CompressionAlgorithm(value, names=<not given>, *values, module=None, qualname=None, type=None, start=1, boundary=None)

Supported compression algorithms.

Uncompressed

No compression

ZIP

ZIP DEFLATE

ZLIB

ZIP DEFLATE with zlib headers

BZ2

Bzip2

HashAlgorithm

class pgpy.constants.HashAlgorithm

Supported hash algorithms.

MD5
SHA1
RIPEMD160
SHA256
SHA384
SHA512
SHA224

SignatureType

class pgpy.constants.SignatureType(value, names=<not given>, *values, module=None, qualname=None, type=None, start=1, boundary=None)

Types of signatures that can be found in a Signature packet.

BinaryDocument

The signer either owns this document, created it, or certifies that it has not been modified.

CanonicalDocument

The signer either owns this document, created it, or certifies that it has not been modified. The signature is calculated over the text data with its line endings converted to <CR><LF>.

Standalone

This signature is a signature of only its own subpacket contents. It is calculated identically to a signature over a zero-length BinaryDocument.

Generic_Cert

The issuer of this certification does not make any particular claim as to how well the certifier has checked that the owner of the key is in fact the person described by the User ID.

Persona_Cert

The issuer of this certification has not done any verification of the claim that the owner of this key is the User ID specified.

Casual_Cert

The issuer of this certification has done some casual verification of the claim of identity.

Positive_Cert

The issuer of this certification has done substantial verification of the claim of identity.

Attestation

This signature is issued by the primary key over itself and its user ID (or user attribute). See draft-ietf-openpgp-rfc4880bis-08

Subkey_Binding

This signature is a statement by the top-level signing key that indicates that it owns the subkey. This signature is calculated directly on the primary key and subkey, and not on any User ID or other packets.

PrimaryKey_Binding

This signature is a statement by a signing subkey, indicating that it is owned by the primary key and subkey. This signature is calculated the same way as a Subkey_Binding signature.

DirectlyOnKey

A signature calculated directly on a key. It binds the information in the Signature subpackets to the key, and is appropriate to be used for subpackets that provide information about the key, such as the Revocation Key subpacket. It is also appropriate for statements that non-self certifiers want to make about the key itself, rather than the binding between a key and a name.

KeyRevocation

A signature calculated directly on the key being revoked. Only revocation signatures by the key being revoked, or by an authorized revocation key, should be considered valid revocation signatures.

SubkeyRevocation

A signature calculated directly on the subkey being revoked. Only revocation signatures by the top-level signature key that is bound to this subkey, or by an authorized revocation key, should be considered valid revocation signatures.

CertRevocation

This signature revokes an earlier User ID certification signature or direct-key signature. It should be issued by the same key that issued the revoked signature or an authorized revocation key. The signature is computed over the same data as the certificate that it revokes.

Timestamp

This signature is only meaningful for the timestamp contained in it.

ThirdParty_Confirmation

This signature is a signature over some other OpenPGP Signature packet(s). It is analogous to a notary seal on the signed data.

KeyFlags

class pgpy.constants.KeyFlags(value, names=<not given>, *values, module=None, qualname=None, type=None, start=1, boundary=None)

Flags that determine a key’s capabilities.

Certify

Signifies that a key may be used to certify keys and user ids. Primary keys always have this, even if it is not specified.

Sign

Signifies that a key may be used to sign messages and documents.

EncryptCommunications

Signifies that a key may be used to encrypt messages.

EncryptStorage

Signifies that a key may be used to encrypt storage. Currently equivalent to EncryptCommunications.

Split

Signifies that the private component of a given key may have been split by a secret-sharing mechanism. Split keys are not currently supported by PGPy.

Authentication

Signifies that a key may be used for authentication.

MultiPerson

Signifies that the private component of a key may be in the possession of more than one person.

RevocationReason

class pgpy.constants.RevocationReason(value, names=<not given>, *values, module=None, qualname=None, type=None, start=1, boundary=None)

Reasons explaining why a key or certificate was revoked.

NotSpecified

No reason was specified. This is the default reason.

Superseded

The key was superseded by a new key. Only meaningful when revoking a key.

Compromised

Key material has been compromised. Only meaningful when revoking a key.

Retired

Key is retired and no longer used. Only meaningful when revoking a key.

UserID

User ID information is no longer valid. Only meaningful when revoking a certification of a user id.

Classes

PGPKey

class pgpy.PGPKey

PGPKey objects represent OpenPGP compliant keys along with all of their associated data.

PGPKey implements the __str__ method, the output of which will be the key composition in OpenPGP-compliant ASCII-armored format.

PGPKey implements the __bytes__ method, the output of which will be the key composition in OpenPGP-compliant binary format.

Any signatures within the PGPKey that are marked as being non-exportable will not be included in the output of either of those methods.

ascii_headers

An OrderedDict of headers that appear, in order, in the ASCII-armored form of this object.

classmethod from_file(filename)

Create a new PGPKey object, with contents loaded from a file. May be binary or ASCII armored.

Parameters:

filename (str) – The path to the file to load.

Raises:

ValueError if a properly formed PGP block was not found in the file at filename

Raises:

PGPError if de-armoring or parsing failed

Returns:

A two element tuple of PGPKey, OrderedDict. The OrderedDict has the following format:

key, others = PGPKey.from_file('path/to/keyfile')
# others: { (Fingerprint, bool(key.is_public)): PGPKey }

classmethod from_blob(blob)

Create a new PGPKey object, with contents loaded from a blob. May be binary or ASCII armored.

Parameters:

blob (str, bytes, unicode, bytearray) – The data to load.

Raises:

TypeError if blob is not in the expected types above

Raises:

ValueError if a properly formed PGP block was not found in blob

Raises:

PGPError if de-armoring or parsing failed

Returns:

A two element tuple of PGPKey, OrderedDict. The OrderedDict has the following format:

key, others = PGPKey.from_file('path/to/keyfile')
# others: { (Fingerprint, bool(key.is_public)): PGPKey }

property created

A datetime object of the creation date and time of the key, in UTC.

property expires_at

A datetime object of when this key is to be considered expired, if any. Otherwise, None

property fingerprint

The fingerprint of this key, as a Fingerprint object.

property is_expired

True if this key is expired, otherwise False

property is_primary

True if this is a primary key; False if this is a subkey

property is_protected

True if this is a private key that is protected with a passphrase, otherwise False

property is_public

True if this is a public key, otherwise False

property is_unlocked

False if this is a private key that is protected with a passphrase and has not yet been unlocked, otherwise True

property key_algorithm

The constants.PubKeyAlgorithm pertaining to this key

property key_size

The size pertaining to this key. int for non-EC key algorithms; constants.EllipticCurveOID for EC keys.

New in version 0.4.1.

property magic

The magic string identifier for the current PGP type

property pubkey

If the PGPKey object is a private key, this method returns a corresponding public key object with all the trimmings. If it is already a public key, just return it.

property signers

A set of key ids of keys that were used to sign this key

property subkeys

An OrderedDict of subkeys bound to this primary key, if applicable, selected by 16-character keyid.

property userids

A list of PGPUID objects containing User ID information about this key

property userattributes

A list of PGPUID objects containing one or more images associated with this key

property revocation_keys

A generator with the list of keys that can revoke this key.

See also PGPSignature.revocation_key()

classmethod new(key_algorithm, key_size, created=None)

Generate a new PGP key

Parameters:

  • key_algorithm (PubKeyAlgorithm) – Key algorithm to use.

  • key_size (int or EllipticCurveOID) – Key size in bits, unless key_algorithm is ECDSA or ECDH, in which case it should be the Curve OID to use.

  • created (datetime or None) – When was the key created? (None or unset means now)

Returns:

A newly generated PGPKey

protect(passphrase, enc_alg, hash_alg)

Add a passphrase to a private key. If the key is already passphrase protected, it should be unlocked before a new passphrase can be specified.

Has no effect on public keys.

Parameters:

  • passphrase (str, unicode) – A passphrase to protect the key with

  • enc_alg (SymmetricKeyAlgorithm) – Symmetric encryption algorithm to use to protect the key

  • hash_alg (HashAlgorithm) – Hash algorithm to use in the String-to-Key specifier

unlock(passphrase)

Context manager method for unlocking passphrase-protected private keys. Has no effect if the key is not both private and passphrase-protected.

When the context managed block is exited, the unprotected private key material is removed.

Example:

privkey = PGPKey()
privkey.parse(keytext)

assert privkey.is_protected
assert privkey.is_unlocked is False
# privkey.sign("some text") <- this would raise an exception

with privkey.unlock("TheCorrectPassphrase"):
    # privkey is now unlocked
    assert privkey.is_unlocked
    # so you can do things with it
    sig = privkey.sign("some text")

# privkey is no longer unlocked
assert privkey.is_unlocked is False

Emits a UserWarning if the key is public or not passphrase protected.

Parameters:

passphrase (str) – The passphrase to be used to unlock this key.

Raises:

PGPDecryptionError if the passphrase is incorrect

add_uid(uid, selfsign=True, **prefs)

Add a User ID to this key.

Parameters:

  • uid (PGPUID) – The user id to add

  • selfsign (bool) – Whether or not to self-sign the user id before adding it

Valid optional keyword arguments are identical to those of self-signatures for PGPKey.certify(). Any such keyword arguments are ignored if selfsign is False

get_uid(search)

Find and return a User ID that matches the search string given.

Parameters:

search (str, unicode) – A text string to match name, comment, or email address against

Returns:

The first matching PGPUID, or None if no matches were found.

del_uid(search)

Find and remove a user id that matches the search string given. This method does not modify the corresponding PGPUID object; it only removes it from the list of user ids on the key.

Parameters:

search (str, unicode) – A text string to match name, comment, or email address against

add_subkey(key, **prefs)

Add a key as a subkey to this key.

Parameters:

  • key – A private PGPKey that does not have any subkeys of its own

  • usage (set) – A set of key usage flags, as KeyFlags for the subkey to be added.

Other valid optional keyword arguments are identical to those of self-signatures for PGPKey.certify()

sign(subject, **prefs)

Sign text, a message, or a timestamp using this key.

Parameters:

subject (str, PGPMessage, None) – The text to be signed

Raises:

PGPError if the key is passphrase-protected and has not been unlocked

Raises:

PGPError if the key is public

Returns:

PGPSignature

The following optional keyword arguments can be used with PGPKey.sign(), as well as PGPKey.certify(), PGPKey.revoke(), and PGPKey.bind():

Parameters:

  • expires (datetime, timedelta) – Set an expiration date for this signature

  • notation (dict) – Add arbitrary notation data to this signature.

  • policy_uri (str) – Add a URI to the signature that should describe the policy under which the signature was issued.

  • revocable (bool) – If False, this signature will be marked non-revocable

  • user (str) – Specify which User ID to use when creating this signature. Also adds a “Signer’s User ID” to the signature.

  • created (datetime) – Specify the time that the signature should be made. If unset or None, it will use the present time.

  • intended_recipients (list) – Specify a list of PGPKey objects that will be encrypted to.

  • include_issuer_fingerprint (bool) – Whether to include a hashed subpacket indicating the issuer fingerprint. (only for v4 keys, defaults to True)

certify(subject, level=SignatureType.Generic_Cert, **prefs)

Sign a key or a user id within a key.

Parameters:
Raises:

PGPError if the key is passphrase-protected and has not been unlocked

Raises:

PGPError if the key is public

Returns:

PGPSignature

In addition to the optional keyword arguments accepted by PGPKey.sign(), the following optional keyword arguments can be used with PGPKey.certify().

These optional keywords only make sense, and thus only have an effect, when self-signing a key or User ID:

Parameters:

  • usage (set) – A set of key usage flags, as KeyFlags. This keyword is ignored for non-self-certifications.

  • ciphers (list) – A list of preferred symmetric ciphers, as SymmetricKeyAlgorithm. This keyword is ignored for non-self-certifications.

  • hashes (list) – A list of preferred hash algorithms, as HashAlgorithm. This keyword is ignored for non-self-certifications.

  • compression (list) – A list of preferred compression algorithms, as CompressionAlgorithm. This keyword is ignored for non-self-certifications.

  • key_expiration (datetime.datetime, datetime.timedelta) – Specify a key expiration date for when this key should expire, or a timedelta of how long after the key was created it should expire. This keyword is ignored for non-self-certifications.

  • attested_certifications (list) – A list of third-party certifications, as PGPSignature, that the certificate holder wants to attest to for redistribution with the certificate. Alternatively, any element in the list can be a bytes or bytearray object of the appropriate length (the length of this certification’s digest). This keyword is only used for signatures of type Attestation.

  • keyserver (str, unicode, bytes) – Specify the URI of the preferred key server of the user. This keyword is ignored for non-self-certifications.

  • keyserver_flags (set) – A set of Key Server Preferences, as KeyServerPreferences.

  • primary (bool) – Whether or not to consider the certified User ID as the primary one. This keyword is ignored for non-self-certifications, and any certifications directly on keys.

These optional keywords only make sense, and thus only have an effect, when signing another key or User ID:

Parameters:

  • trust (tuple of two int s) – Specify the level and amount of trust to assert when certifying a public key. Should be a tuple of two int s, specifying the trust level and trust amount. See RFC 4880 Section 5.2.3.13. Trust Signature for more on what these values mean.

  • regex (str) – Specify a regular expression to constrain the specified trust signature in the resulting signature. Symbolically signifies that the specified trust signature only applies to User IDs which match this regular expression. This is meaningless without also specifying trust level and amount.

  • exportable (bool) – Whether this certification is exportable or not.

revoke(target, **prefs)

Revoke a key, a subkey, or all current certification signatures of a User ID that were generated by this key so far.

Parameters:

target (PGPKey, PGPUID) – The key to revoke

Raises:

PGPError if the key is passphrase-protected and has not been unlocked

Raises:

PGPError if the key is public

Returns:

PGPSignature

In addition to the optional keyword arguments accepted by PGPKey.sign(), the following optional keyword arguments can be used with PGPKey.revoke().

Parameters:
revoker(revoker, **prefs)

Generate a signature that specifies another key as being valid for revoking this key.

Parameters:

revoker (PGPKey) – The PGPKey to specify as a valid revocation key.

Raises:

PGPError if the key is passphrase-protected and has not been unlocked

Raises:

PGPError if the key is public

Returns:

PGPSignature

In addition to the optional keyword arguments accepted by PGPKey.sign(), the following optional keyword arguments can be used with PGPKey.revoker().

Parameters:

sensitive (bool) – If True, this sets the sensitive flag on the RevocationKey subpacket. Currently, this has no other effect.

bind(key, **prefs)

Bind a subkey to this key.

In addition to the optional keyword arguments accepted for self-signatures by PGPkey.certify(), the following optional keyword arguments can be used with PGPKey.bind().

Parameters:

crosssign (bool) – If False, do not attempt a cross-signature (defaults to True). Subkeys which are not capable of signing will not produce a cross-signature in any case. Setting crosssign to False is likely to produce subkeys that will be rejected by some other OpenPGP implementations.

verify(subject, signature=None)

Verify a subject with a signature using this key.

Parameters:

  • subject (str, unicode, None, PGPMessage, PGPKey, PGPUID) – The subject to verify

  • signature (PGPSignature) – If the signature is detached, it should be specified here.

Returns:

SignatureVerification

encrypt(message, [sessionkey=None, ]**prefs)

Encrypt a PGPMessage using this key.

Parameters:

  • message (PGPMessage) – The message to encrypt.

  • sessionkey (bytes, str) –

    Provide a session key to use when encrypting something. Default is None. If None, a session key of the appropriate length will be generated randomly.

    Warning

    Care should be taken when making use of this option! Session keys absolutely need to be unpredictable! Use the gen_key() method on the desired SymmetricKeyAlgorithm to generate the session key!

Raises:

PGPEncryptionError if encryption failed for any reason.

Returns:

A new PGPMessage with the encrypted contents of message

The following optional keyword arguments can be used with PGPKey.encrypt():

Parameters:

  • cipher (SymmetricKeyAlgorithm) – Specifies the symmetric block cipher to use when encrypting the message.

  • user (str, unicode) – Specifies the User ID to use as the recipient for this encryption operation, for the purposes of preference defaults and selection validation.

decrypt(message)

Decrypt a PGPMessage using this key.

Parameters:

message – An encrypted PGPMessage

Raises:

PGPError if the key is not private, or protected but not unlocked.

Raises:

PGPDecryptionError if decryption fails for any other reason.

Returns:

A new PGPMessage with the decrypted contents of message.

parse(data)

this method is too abstract to understand

PGPKeyring

class pgpy.PGPKeyring

PGPKeyring objects represent in-memory keyrings that can contain any combination of supported private and public keys. It can not currently be conveniently exported to a format that can be understood by GnuPG.

ascii_headers

An OrderedDict of headers that appear, in order, in the ASCII-armored form of this object.

load(*args)

Load all keys provided into this keyring object.

Parameters:

*args (list, tuple, str, unicode, bytes, bytearray) – Each arg in args can be any of the formats supported by PGPKey.from_file() and PGPKey.from_blob() or a PGPKey instance, or a list or tuple of these.

Returns:

a set containing the unique fingerprints of all of the keys that were loaded during this operation.

key(identifier)

A context-manager method. Yields the first PGPKey object that matches the provided identifier.

Parameters:

identifier (PGPMessage, PGPSignature, str) – The identifier to use to select a loaded key.

Raises:

KeyError if there is no loaded key that satisfies the identifier.

fingerprints(keyhalf='any', keytype='any')

List loaded fingerprints with some optional filtering.

Parameters:

  • keyhalf (str) – Can be ‘any’, ‘public’, or ‘private’. If ‘public’, or ‘private’, the fingerprints of keys of the the other type will not be included in the results.

  • keytype (str) – Can be ‘any’, ‘primary’, or ‘sub’. If ‘primary’ or ‘sub’, the fingerprints of keys of the the other type will not be included in the results.

Returns:

a set of fingerprints of keys matching the filters specified.

unload(key)

Unload a loaded key and its subkeys.

Parameters:

key (PGPKey) – The key to unload.

The easiest way to do this is to select a key using PGPKeyring.key() first:

with keyring.key("DSA von TestKey") as key:
    keyring.unload(key)

PGPMessage

class pgpy.PGPMessage

PGPMessage objects represent OpenPGP message compositions.

PGPMessage implements the __str__ method, the output of which will be the message composition in OpenPGP-compliant ASCII-armored format.

PGPMessage implements the __bytes__ method, the output of which will be the message composition in OpenPGP-compliant binary format.

Any signatures within the PGPMessage that are marked as being non-exportable will not be included in the output of either of those methods.

ascii_headers

An OrderedDict of headers that appear, in order, in the ASCII-armored form of this object.

classmethod from_file(filename)

Create a new PGPMessage object, with contents loaded from a file. May be binary or ASCII armored.

Parameters:

filename (str) – The path to the file to load.

Raises:

ValueError if a properly formed PGP block was not found in the file at filename

Raises:

PGPError if de-armoring or parsing failed

Returns:

PGPMessage

classmethod from_blob(blob)

Create a new PGPMessage object, with contents loaded from a blob. May be binary or ASCII armored.

Parameters:

blob (str, bytes, unicode, bytearray) – The data to load.

Raises:

TypeError if blob is not in the expected types above

Raises:

ValueError if a properly formed PGP block was not found in blob

Raises:

PGPError if de-armoring or parsing failed

Returns:

PGPMessage

property encrypters

A set containing all key ids (if any) to which this message was encrypted.

property filename

If applicable, returns the original filename of the message. Otherwise, returns an empty string.

property is_compressed

True if this message will be compressed when exported

property is_encrypted

True if this message is encrypted; otherwise, False

property is_sensitive

True if this message is marked sensitive; otherwise False

property is_signed

True if this message is signed; otherwise, False. Should always be False if the message is encrypted.

property issuers

A set containing all key ids (if any) which have signed or encrypted this message.

property magic

The magic string identifier for the current PGP type

property message

The message contents

property signatures

A set containing all key ids (if any) which have signed this message.

property signers

A set containing all key ids (if any) which have signed this message.

classmethod new(message, **kwargs)

Create a new PGPMessage object.

Parameters:

message (str, unicode, bytes, bytearray) – The message to be stored.

Returns:

PGPMessage

The following optional keyword arguments can be used with PGPMessage.new():

Parameters:

  • file (bool) – if True, message should be a path to a file. The contents of that file will be read and used as the contents of the message.

  • cleartext (bool) – if True, the message will be cleartext with inline signatures.

  • sensitive (bool) – if True, the filename will be set to ‘_CONSOLE’ to signal other OpenPGP clients to treat this message as being ‘for your eyes only’. Ignored if cleartext is True.

  • format (str) – Set the message format identifier. Ignored if cleartext is True.

  • compression – Set the compression algorithm for the new message. Defaults to CompressionAlgorithm.ZIP. Ignored if cleartext is True.

  • encoding (str representing a valid codec in codecs) – Set the Charset header for the message.

encrypt(passphrase, [sessionkey=None, ]**prefs)

Encrypt the contents of this message using a passphrase.

Parameters:

  • passphrase (str, unicode, bytes) – The passphrase to use for encrypting this message.

  • sessionkey (bytes, str) –

    Provide a session key to use when encrypting something. Default is None. If None, a session key of the appropriate length will be generated randomly.

    Warning

    Care should be taken when making use of this option! Session keys absolutely need to be unpredictable! Use the gen_key() method on the desired SymmetricKeyAlgorithm to generate the session key!

Raises:

PGPEncryptionError

Returns:

A new PGPMessage containing the encrypted contents of this message.

decrypt(passphrase)

Attempt to decrypt this message using a passphrase.

Parameters:

passphrase (str, unicode, bytes) – The passphrase to use to attempt to decrypt this message.

Raises:

PGPDecryptionError if decryption failed for any reason.

Returns:

A new PGPMessage containing the decrypted contents of this message

parse(packet)

this method is too abstract to understand

PGPSignature

class pgpy.PGPSignature

PGPSignature objects represent OpenPGP compliant signatures.

PGPSignature implements the __str__ method, the output of which will be the signature object in OpenPGP-compliant ASCII-armored format.

PGPSignature implements the __bytes__ method, the output of which will be the signature object in OpenPGP-compliant binary format.

ascii_headers

An OrderedDict of headers that appear, in order, in the ASCII-armored form of this object.

classmethod from_file(filename)

Create a new PGPSignature object, with contents loaded from a file. May be binary or ASCII armored.

Parameters:

filename (str) – The path to the file to load.

Raises:

ValueError if a properly formed PGP block was not found in the file at filename

Raises:

PGPError if de-armoring or parsing failed

Returns:

PGPSignature

classmethod from_blob(blob)

Create a new PGPSignature object, with contents loaded from a blob. May be binary or ASCII armored.

Parameters:

blob (str, bytes, unicode, bytearray) – The data to load.

Raises:

TypeError if blob is not in the expected types above

Raises:

ValueError if a properly formed PGP block was not found in blob

Raises:

PGPError if de-armoring or parsing failed

Returns:

PGPSignature

property cipherprefs

A list of preferred symmetric algorithms specified in this signature, if any. Otherwise, an empty list.

property compprefs

A list of preferred compression algorithms specified in this signature, if any. Otherwise, an empty list.

property created

A datetime of when this signature was created.

property expires_at

A datetime of when this signature expires, if a signature expiration date is specified. Otherwise, None

property exportable

False if this signature is marked as being not exportable. Otherwise, True.

property features

A set of implementation features specified in this signature, if any. Otherwise, an empty set.

property hashprefs

A list of preferred hash algorithms specified in this signature, if any. Otherwise, an empty list.

property hash_algorithm

The HashAlgorithm used when computing this signature.

property is_expired

True if the signature has an expiration date, and is expired. Otherwise, False

property key_algorithm

The PubKeyAlgorithm of the key that generated this signature.

property key_flags

A set of KeyFlags specified in this signature, if any. Otherwise, an empty set.

property keyserver

The preferred key server specified in this signature, if any. Otherwise, an empty str.

property keyserverprefs

A list of KeyServerPreferences in this signature, if any. Otherwise, an empty list.

property magic

The magic string identifier for the current PGP type

property notation

A dict of notation data in this signature, if any. Otherwise, an empty dict.

property policy_uri

The policy URI specified in this signature, if any. Otherwise, an empty str.

property revocable

False if this signature is marked as being not revocable. Otherwise, True.

property attested_certifications

Returns a set of all the hashes of attested certifications covered by this Attestation Key Signature.

Unhashed subpackets are ignored.

property signer

The 16-character Key ID of the key that generated this signature.

property signer_fingerprint

The fingerprint of the key that generated this signature, if it contained. Otherwise, an empty str.

property intended_recipients

Returns an iterator over all the primary key fingerprints marked as intended encrypted recipients for this signature.

property type

The SignatureType of this signature.

attests_to(othersig)

returns True if this signature attests to othersig (acknolwedges it for redistribution)

parse(packet)

this method is too abstract to understand

PGPUID

class pgpy.PGPUID

PGPUID objects represent User IDs and User Attributes for keys.

PGPUID implements the __format__ method for User IDs, returning a string in the format ‘name (comment) <email>’, leaving out any comment or email fields that are not present.

property name

If this is a User ID, the stored name. If this is not a User ID, this will be an empty string.

property comment

If this is a User ID, this will be the stored comment. If this is not a User ID, or there is no stored comment, this will be an empty string.,

property email

If this is a User ID, this will be the stored email address. If this is not a User ID, or there is no stored email address, this will be an empty string.

property userid

If this is a User ID, this will be the full UTF-8 string. If this is not a User ID, this will be None.

property image

If this is a User Attribute, this will be the stored image. If this is not a User Attribute, this will be None.

property is_primary

If the most recent, valid self-signature specifies this as being primary, this will be True. Otherwise, False.

property is_uid

True if this is a User ID, otherwise False.

property is_ua

True if this is a User Attribute, otherwise False.

property selfsig

This will be the most recent, self-signature of this User ID or Attribute. If there isn’t one, this will be None.

property signers

This will be a set of all of the key ids which have signed this User ID or Attribute.

property third_party_certifications

A generator returning all third-party certifications

attested_to(certifications)

filter certifications, only returning those that have been attested to by the first party

property attested_third_party_certifications

A generator that provides a list of all third-party certifications attested to by the primary key.

classmethod new(pn, comment='', email='')

Create a new User ID or photo.

Parameters:

  • pn (bytearray, str, unicode) – User ID name, or photo. If this is a bytearray, it will be loaded as a photo. Otherwise, it will be used as the name field for a User ID.

  • comment (str, unicode) – The comment field for a User ID. Ignored if this is a photo.

  • email (str, unicode) – The email address field for a User ID. Ignored if this is a photo.

Returns:

PGPUID

Other Objects

These are objects that are returned during certain operations, but are probably not useful to instantiate directly.

SignatureVerification

class pgpy.types.SignatureVerification

Returned by PGPKey.verify()

Can be compared directly as a boolean to determine whether or not the specified signature verified.

property good_signatures

A generator yielding namedtuples of all signatures that were successfully verified in the operation that returned this instance. The namedtuple has the following attributes:

sigsubj.issues - SecurityIssues of whether the signature verified successfully or not. Must be 0 for success.

sigsubj.by - the PGPKey that was used in this verify operation.

sigsubj.signature - the PGPSignature that was verified.

sigsubj.subject - the subject that was verified using the signature.

property bad_signatures

A generator yielding namedtuples of all signatures that were not verified in the operation that returned this instance. The namedtuple has the following attributes:

sigsubj.verified - bool of whether the signature verified successfully or not.

sigsubj.by - the PGPKey that was used in this verify operation.

sigsubj.signature - the PGPSignature that was verified.

sigsubj.subject - the subject that was verified using the signature.

Fingerprint

class pgpy.types.Fingerprint(content)

A subclass of str. Can be compared using == and != to str, unicode, and other Fingerprint instances.

Primarily used as a key for internal dictionaries, so it ignores spaces when comparing and hashing