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mpint: add mp_[lr]shift_safe_into functions.

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There was previously no safe left shift at all, which is an omission.
And rshift_safe_into was an odd thing to be missing, so while I'm
here, I've added it on the basis that it will probably be useful
sooner or later.
This commit is contained in:
Simon Tatham
2020-02-18 18:55:56 +00:00
parent dec79cf152
commit 18678ba9bc
4 changed files with 71 additions and 4 deletions
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2
testcrypt.h
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@ -75,6 +75,8 @@ FUNC3(val_mpint, mp_modpow, val_mpint, val_mpint, val_mpint)
FUNC3(val_mpint, mp_modmul, val_mpint, val_mpint, val_mpint)
FUNC3(val_mpint, mp_modadd, val_mpint, val_mpint, val_mpint)
FUNC3(val_mpint, mp_modsub, val_mpint, val_mpint, val_mpint)
FUNC3(void, mp_lshift_safe_into, val_mpint, val_mpint, uint)
FUNC3(void, mp_rshift_safe_into, val_mpint, val_mpint, uint)
FUNC2(val_mpint, mp_rshift_safe, val_mpint, uint)
FUNC3(void, mp_lshift_fixed_into, val_mpint, val_mpint, uint)
FUNC3(void, mp_rshift_fixed_into, val_mpint, val_mpint, uint)