epicyon/pgp.py

__filename__ = "pgp.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "1.2.0"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"


def getEmailAddress(actorJson: {}) -> str:
    """Returns the email address for the given actor
    """
    if not actorJson.get('attachment'):
        return ''
    for propertyValue in actorJson['attachment']:
        if not propertyValue.get('name'):
            continue
        if not propertyValue['name'].lower().startswith('email'):
            continue
        if not propertyValue.get('type'):
            continue
        if not propertyValue.get('value'):
            continue
        if propertyValue['type'] != 'PropertyValue':
            continue
        if '@' not in propertyValue['value']:
            continue
        if '.' not in propertyValue['value']:
            continue
        return propertyValue['value']
    return ''


def getPGPpubKey(actorJson: {}) -> str:
    """Returns PGP public key for the given actor
    """
    if not actorJson.get('attachment'):
        return ''
    for propertyValue in actorJson['attachment']:
        if not propertyValue.get('name'):
            continue
        if not propertyValue['name'].lower().startswith('pgp'):
            continue
        if not propertyValue.get('type'):
            continue
        if not propertyValue.get('value'):
            continue
        if propertyValue['type'] != 'PropertyValue':
            continue
        if '--BEGIN PGP PUBLIC KEY' not in propertyValue['value']:
            continue
        return propertyValue['value']
    return ''


def getPGPfingerprint(actorJson: {}) -> str:
    """Returns PGP fingerprint for the given actor
    """
    if not actorJson.get('attachment'):
        return ''
    for propertyValue in actorJson['attachment']:
        if not propertyValue.get('name'):
            continue
        if not propertyValue['name'].lower().startswith('openpgp'):
            continue
        if not propertyValue.get('type'):
            continue
        if not propertyValue.get('value'):
            continue
        if propertyValue['type'] != 'PropertyValue':
            continue
        if len(propertyValue['value']) < 10:
            continue
        return propertyValue['value']
    return ''


def setEmailAddress(actorJson: {}, emailAddress: str) -> None:
    """Sets the email address for the given actor
    """
    notEmailAddress = False
    if '@' not in emailAddress:
        notEmailAddress = True
    if '.' not in emailAddress:
        notEmailAddress = True
    if '<' in emailAddress:
        notEmailAddress = True
    if emailAddress.startswith('@'):
        notEmailAddress = True

    if not actorJson.get('attachment'):
        actorJson['attachment'] = []

    # remove any existing value
    propertyFound = None
    for propertyValue in actorJson['attachment']:
        if not propertyValue.get('name'):
            continue
        if not propertyValue.get('type'):
            continue
        if not propertyValue['name'].lower().startswith('email'):
            continue
        propertyFound = propertyValue
        break
    if propertyFound:
        actorJson['attachment'].remove(propertyFound)
    if notEmailAddress:
        return

    for propertyValue in actorJson['attachment']:
        if not propertyValue.get('name'):
            continue
        if not propertyValue.get('type'):
            continue
        if not propertyValue['name'].lower().startswith('email'):
            continue
        if propertyValue['type'] != 'PropertyValue':
            continue
        propertyValue['value'] = emailAddress
        return

    newEmailAddress = {
        "name": "Email",
        "type": "PropertyValue",
        "value": emailAddress
    }
    actorJson['attachment'].append(newEmailAddress)


def setPGPpubKey(actorJson: {}, PGPpubKey: str) -> None:
    """Sets a PGP public key for the given actor
    """
    removeKey = False
    if not PGPpubKey:
        removeKey = True
    else:
        if '--BEGIN PGP PUBLIC KEY' not in PGPpubKey:
            removeKey = True
        if '<' in PGPpubKey:
            removeKey = True

    if not actorJson.get('attachment'):
        actorJson['attachment'] = []

    # remove any existing value
    propertyFound = None
    for propertyValue in actorJson['attachment']:
        if not propertyValue.get('name'):
            continue
        if not propertyValue.get('type'):
            continue
        if not propertyValue['name'].lower().startswith('pgp'):
            continue
        propertyFound = propertyValue
        break
    if propertyFound:
        actorJson['attachment'].remove(propertyValue)
    if removeKey:
        return

    for propertyValue in actorJson['attachment']:
        if not propertyValue.get('name'):
            continue
        if not propertyValue.get('type'):
            continue
        if not propertyValue['name'].lower().startswith('pgp'):
            continue
        if propertyValue['type'] != 'PropertyValue':
            continue
        propertyValue['value'] = PGPpubKey
        return

    newPGPpubKey = {
        "name": "PGP",
        "type": "PropertyValue",
        "value": PGPpubKey
    }
    actorJson['attachment'].append(newPGPpubKey)


def setPGPfingerprint(actorJson: {}, fingerprint: str) -> None:
    """Sets a PGP fingerprint for the given actor
    """
    removeFingerprint = False
    if not fingerprint:
        removeFingerprint = True
    else:
        if len(fingerprint) < 10:
            removeFingerprint = True

    if not actorJson.get('attachment'):
        actorJson['attachment'] = []

    # remove any existing value
    propertyFound = None
    for propertyValue in actorJson['attachment']:
        if not propertyValue.get('name'):
            continue
        if not propertyValue.get('type'):
            continue
        if not propertyValue['name'].lower().startswith('openpgp'):
            continue
        propertyFound = propertyValue
        break
    if propertyFound:
        actorJson['attachment'].remove(propertyValue)
    if removeFingerprint:
        return

    for propertyValue in actorJson['attachment']:
        if not propertyValue.get('name'):
            continue
        if not propertyValue.get('type'):
            continue
        if not propertyValue['name'].lower().startswith('openpgp'):
            continue
        if propertyValue['type'] != 'PropertyValue':
            continue
        propertyValue['value'] = fingerprint.strip()
        return

    newPGPfingerprint = {
        "name": "OpenPGP",
        "type": "PropertyValue",
        "value": fingerprint
    }
    actorJson['attachment'].append(newPGPfingerprint)