Package Crypto :: Package Hash :: Module SHA224 :: Class SHA224Hash

Class SHA224Hash

hashalgo.HashAlgo --+
                    |
                   SHA224Hash

Class that implements a SHA-224 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\t`\x86H\x01e\x03\x04\x02\x04' ASN.1 Object identifier (OID):
	digest_size = `28` 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-sha224    OBJECT IDENTIFIER ::= {
    joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3)
    nistalgorithm(4) hashalgs(2) 4
}

This value uniquely identifies the SHA-224 algorithm.

Value:

'\x06\t`\x86H\x01e\x03\x04\x02\x04'