diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2015-11-21 09:39:59 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2015-11-21 09:39:59 +0100 |
| commit | 38e1e5272fc9c66a00d702246813135452819ffe (patch) | |
| tree | b2d56b8f5e66a17daeb63693fc4dbd15c7308275 /sys/src/libmp/port/letomp.c | |
| parent | b677ab0c5909942bf8946e9e9bd148dea7dae718 (diff) | |
libmp: initial attempt at constant time code, faster reductions for special primes (for ecc)
introduce MPtimesafe flag to request time invariant computation
disables normalization so significant digits are not leaked.
Diffstat (limited to 'sys/src/libmp/port/letomp.c')
| -rw-r--r-- | sys/src/libmp/port/letomp.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/src/libmp/port/letomp.c b/sys/src/libmp/port/letomp.c index e23fed21e..d5cca241b 100644 --- a/sys/src/libmp/port/letomp.c +++ b/sys/src/libmp/port/letomp.c @@ -9,8 +9,10 @@ letomp(uchar *s, uint n, mpint *b) int i=0, m = 0; mpdigit x=0; - if(b == nil) + if(b == nil){ b = mpnew(0); + setmalloctag(b, getcallerpc(&s)); + } mpbits(b, 8*n); for(; n > 0; n--){ x |= ((mpdigit)(*s++)) << i; @@ -24,5 +26,6 @@ letomp(uchar *s, uint n, mpint *b) if(i > 0) b->p[m++] = x; b->top = m; - return b; + b->sign = 1; + return mpnorm(b); } |