denozord/strongswan-ext
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93f0080265a700ab9060783807b53c39e1b536b1
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4 Commits
Author SHA1 Message Date
Martin Willi 93f0080265 aesni: Align all class instances to 16 byte boundaries 
While the required members are aligned in the struct as required, on 32-bit
platforms the allocator aligns the structures itself to 8 bytes only. This
results in non-aligned struct members, and invalid memory accesses.
 2015-04-15 13:44:40 +02:00
Martin Willi 8488dea2f9 aesni: Use 4-way parallel AES-NI instructions for CTR en/decryption 
CTR can be parallelized, and we do so by queueing instructions to the processor
pipeline. While we have enough registers for 128-bit decryption, the register
count is insufficient to hold all variables with larger key sizes. Nonetheless
is 4-way parallelism faster, depending on key size between ~10% and ~25%.
 2015-04-15 11:35:27 +02:00
Martin Willi 9e47c1fe77 aesni: Use dedicated round count specific encryption functions in CTR mode 
This allows us to unroll loops and hold the key schedule in local (register)
variables. This brings an impressive speedup of ~45%.
 2015-04-15 11:35:27 +02:00
Martin Willi 74d43cbde9 aesni: Implement a AES-NI based CTR crypter using the key schedule 2015-04-15 11:35:27 +02:00