micropython-lib/python-stdlib/hashlib-sha224/hashlib/_sha224.py

# MIT license; Copyright (c) 2023 Jim Mussared
# Originally ported from CPython by Paul Sokolovsky

from ._sha256 import sha256


class sha224(sha256):
    digest_size = digestsize = 28
    _iv = [
        0xC1059ED8,
        0x367CD507,
        0x3070DD17,
        0xF70E5939,
        0xFFC00B31,
        0x68581511,
        0x64F98FA7,
        0xBEFA4FA4,
    ]
hashlib: Refactor, split, and optimise. This splits out each algorithm into its own extension package, so that only the necessary algorithms can be installed. This allows for a significant reduction in RAM and flash. i.e. previously installing hashlib meant that all algorithms were imported. Additionally ensures that any built-in hash algorithms (from uhashlib) are still exposed (e.g. `md5`), and retains the existing behavior to use the built-in preferentially. Also includes a refactoring of the algorithms to reduce code size and reduce the number of allocations they do as well as using bytearrays in place of list-of-int where possible. Add more comprehensive tests (using unittest). This work was funded through GitHub Sponsors. Signed-off-by: Jim Mussared <jim.mussared@gmail.com> 2023-06-01 14:12:28 +00:00			`# MIT license; Copyright (c) 2023 Jim Mussared`
			`# Originally ported from CPython by Paul Sokolovsky`

			`from ._sha256 import sha256`


			`class sha224(sha256):`
			`digest_size = digestsize = 28`
			`_iv = [`
			`0xC1059ED8,`
			`0x367CD507,`
			`0x3070DD17,`
			`0xF70E5939,`
			`0xFFC00B31,`
			`0x68581511,`
			`0x64F98FA7,`
			`0xBEFA4FA4,`
			`]`