common Package

health Module

lemur.common.health.health()

lemur.common.health.healthcheck(db)

managers Module

class lemur.common.managers.InstanceManager(class_list=None, instances=True)

Bases: object

add(class_path)

all()

Returns a list of cached instances.

get_class_list()

remove(class_path)

update(class_list)

Updates the class list and wipes the cache.

utils Module

lemur.common.utils.column_windows(session, column, windowsize)

Return a series of WHERE clauses against a given column that break it into windows.

Result is an iterable of tuples, consisting of ((start, end), whereclause), where (start, end) are the ids.

Requires a database that supports window functions, i.e. Postgresql, SQL Server, Oracle.

Enhance this yourself ! Add a “where” argument so that windows of just a subset of rows can be computed.

lemur.common.utils.generate_private_key(key_type)

Generates a new private key based on key_type.

Valid key types: RSA2048, RSA4096’, ‘ECCPRIME192V1’, ‘ECCPRIME256V1’, ‘ECCSECP192R1’,

‘ECCSECP224R1’, ‘ECCSECP256R1’, ‘ECCSECP384R1’, ‘ECCSECP521R1’, ‘ECCSECP256K1’, ‘ECCSECT163K1’, ‘ECCSECT233K1’, ‘ECCSECT283K1’, ‘ECCSECT409K1’, ‘ECCSECT571K1’, ‘ECCSECT163R2’, ‘ECCSECT233R1’, ‘ECCSECT283R1’, ‘ECCSECT409R1’, ‘ECCSECT571R2’

Parameters:key_type – Returns:

lemur.common.utils.get_authority_key(body)

Returns the authority key for a given certificate in hex format

lemur.common.utils.get_psuedo_random_string()

Create a random and strongish challenge.

lemur.common.utils.is_weekend(date)

Determines if a given date is on a weekend.

Parameters:date – Returns:

lemur.common.utils.parse_certificate(body)

Helper function that parses a PEM certificate.

Parameters:body – Returns:

lemur.common.utils.parse_csr(csr)

Helper function that parses a CSR.

Parameters:csr – Returns:

lemur.common.utils.truthiness(s)

If input string resembles something truthy then return True, else False.

lemur.common.utils.validate_conf(app, required_vars)

Ensures that the given fields are set in the applications conf.

Parameters:

• app –
• required_vars – list

lemur.common.utils.windowed_query(q, column, windowsize)

“Break a Query into windows on a given column.