Package Crypto :: Package Hash :: Module SHA :: Class SHA1Hash

Class SHA1Hash

hashalgo.HashAlgo --+
                    |
                   SHA1Hash

Class that implements a SHA-1 hash

Instance Methods

__init__(self, data=None)
Initialize the hash object.

new(self, data=None)
Return a fresh instance of the hash object.

Inherited from hashalgo.HashAlgo

copy(self)
Return a copy ("clone") of the hash object.

digest(self)
Return the binary (non-printable) digest of the message that has been hashed so far.

hexdigest(self)
Return the printable digest of the message that has been hashed so far.

update(self, data)
Continue hashing of a message by consuming the next chunk of data.

Class Variables
	oid = `'\x06\x05+\x0e\x03\x02\x1a'` ASN.1 Object identifier (OID):
	digest_size = `20` The size of the resulting hash in bytes.

Method Details

Initialize the hash object.

Parameters:

hashFactory - An object that will generate the actual hash implementation. hashFactory must have a new() method, or must be directly callable.
data - The very first chunk of the message to hash. It is equivalent to an early call to update().

(inherited documentation)

Return a fresh instance of the hash object.

Unlike the copy method, the internal state of the object is empty.

Parameters:

Returns:

A hash object of the same type

(inherited documentation)

Class Variable Details

ASN.1 Object identifier (OID):

id-sha1    OBJECT IDENTIFIER ::= {
    iso(1) identified-organization(3) oiw(14) secsig(3)
     algorithms(2) 26
}

This value uniquely identifies the SHA-1 algorithm.

Value:

'\x06\x05+\x0e\x03\x02\x1a'