Make libjade use DOIT instructions on secrets (p2)#123
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egrep is deprecated.
This spills some more registers to the stack in the reference chacha core. This comes at a significant performance cost. Further experimentation should be done with register packing instead.
But at what cost?!?
The rotate instruction just ignores these, but the ">>=" operators complain.
Fix xsalsa20poly1305 by swapping its xsalsa20 with the DOIT one. Adds declassifies into xsalsa20poly1305. This declassifies the result of tag verification, which leaks via a branch (decryption is not done if tag does not verify).
Make libjade use DOIT instructions on secrets
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Second part of: #108