June 2017
Intermediate to advanced
1456 pages
48h 27m
English
Content preview from The Python 3 Standard Library by Example, Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 9. Cryptography
Encryption secures messages so that they can be verified as accurate and protected from interception. Python’s cryptography support includes hashlib (page 523) for generating signatures of message content using standard algorithms such as MD5 and SHA, and hmac (page 528) for verifying that a message has not been altered in transmission.
9.1 hashlib: Cryptographic Hashing
The hashlib module defines an API for accessing different cryptographic hashing algorithms. To work with a specific hash algorithm, use the appropriate constructor function or new() to create a hash object. From there, the objects use the same API, no matter which algorithm is being used.
9.1.1 Hash Algorithms
Since hashlib is “backed” by OpenSSL, all ...
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