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| author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
|---|---|---|
| committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
| commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
| tree | 10027f336435511475e392454359edea8e25895d /python/PyECC/ecc/shacrypt.py | |
| parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
| download | UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip | |
Add m-esr52 at 52.6.0
Diffstat (limited to 'python/PyECC/ecc/shacrypt.py')
| -rw-r--r-- | python/PyECC/ecc/shacrypt.py | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/python/PyECC/ecc/shacrypt.py b/python/PyECC/ecc/shacrypt.py new file mode 100644 index 000000000..69ee7b943 --- /dev/null +++ b/python/PyECC/ecc/shacrypt.py @@ -0,0 +1,38 @@ +# ------------------------------------------------------------------------------ +# +# SHA-512-BASED FEISTEL CIPHER +# by Toni Mattis +# +# Feistel Function: SHA-512(Block || Key) +# Key Size: Fully Dynamic +# Block Size: 1024 Bits +# Rounds: User-Specified +# +# ------------------------------------------------------------------------------ + +from hashlib import sha512 + +BPOS = tuple(range(64)) + +def enc_block(block, key, rounds = 16): + x = block[:64] + y = block[64:] + for i in xrange(rounds): + h = sha512(x + key).digest() + y = ''.join([chr(ord(y[k]) ^ ord(h[k])) for k in BPOS]) + h = sha512(y + key).digest() + x = ''.join([chr(ord(x[k]) ^ ord(h[k])) for k in BPOS]) + return x + y + +def dec_block(block, key, rounds = 16): + x = block[:64] + y = block[64:] + for i in xrange(rounds): + h = sha512(y + key).digest() + x = ''.join([chr(ord(x[k]) ^ ord(h[k])) for k in BPOS]) + h = sha512(x + key).digest() + y = ''.join([chr(ord(y[k]) ^ ord(h[k])) for k in BPOS]) + return x + y + + + |