Essential Books

Calculating a Message Digest

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The hashlib module allows creating message digest generators via the new method. These generators will turn an arbitrary string into a fixed-length digest: 

import hashlib

h = hashlib.new('sha256')
h.update(b'Nobody expects the Spanish Inquisition.')
h.digest()
# ==> b'.\xdf\xda\xdaVR[\x12\x90\xff\x16\xfb\x17D\xcf\xb4\x82\xdd)\x14\xff\xbc\xb6Iy\x0c\x0eX\x9eF-='

Note that you can call update an arbitrary number of times before calling digest which is useful to hash a large file chunk by chunk. You can also get the digest in hexadecimal format by using hexdigest: 

h.hexdigest()
# ==> '2edfdada56525b1290ff16fb1744cfb482dd2914ffbcb649790c0e589e462d3d'
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Security and Cryptograhy:
* Security and Cryptography
* Secure Password Hashing
* Calculating a Message Digest
* Available Hashing Algorithms
* File Hashing
* Symmetric encryption using pycrypto
* Generating RSA signatures using pycrypto
* Asymmetric RSA encryption using pycrypto
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165 hashlib
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188 Writing to CSV from String or List
189 Raise Custom Errors Exceptions
190 Using loops within functions
191 Contributors