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MD5 Implementation #8272

Closed
wants to merge 4 commits into from
Closed

MD5 Implementation #8272

wants to merge 4 commits into from

Commits on Aug 17, 2013

  1. Crypto: Add little-endian versions of existing functions: read_u32v_l… 

    …e and write_u32_le.
    Palmer Cox committed Aug 17, 2013
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  2. MD5: Create an implementation of MD5.

    Palmer Cox committed Aug 17, 2013
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  3. Crypto: update checked addition functions to use CheckedAdd intrinsic. 

    The shift_add_check_overflow and shift_add_check_overflow_tuple functions are
re-written to be more efficient and to make use of the CheckedAdd instrinsic
instead of manually checking for integer overflow.

* The invokation leading_zeros() is removed and replaced with simple integer
  comparison. The leading_zeros() method results in a ctpop LLVM instruction
  and it may not be efficient on all architectures; integer comparisons,
  however, are efficient on just about any architecture.
* The methods lose the ability for the caller to specify a particular shift
  value - that functionality wasn't being used and removing it allows for the
  code to be simplified.
* Finally, the methods are renamed to add_bytes_to_bits and
  add_bytes_to_bits_tuple to reflect their very specific purposes.
    Palmer Cox committed Aug 17, 2013
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  4. Crypto: Add tests for add_bytes_to_bits functions.

    Palmer Cox committed Aug 17, 2013
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