diff options
Diffstat (limited to 'src/lib/pubkey/ed25519/ge.cpp')
| -rw-r--r-- | src/lib/pubkey/ed25519/ge.cpp | 30 |
1 files changed, 14 insertions, 16 deletions
diff --git a/src/lib/pubkey/ed25519/ge.cpp b/src/lib/pubkey/ed25519/ge.cpp index a92a306c3..a8cf593e8 100644 --- a/src/lib/pubkey/ed25519/ge.cpp +++ b/src/lib/pubkey/ed25519/ge.cpp @@ -391,20 +391,18 @@ void ge_sub(ge_p1p1* r, const ge_p3* p, const ge_cached* q) } - void slide(int8_t* r, const uint8_t* a) { - int i; - int b; - int k; - - for(i = 0; i < 256; ++i) - { r[i] = 1 & (a[i >> 3] >> (i & 7)); } + for(size_t i = 0; i < 256; ++i) + { + r[i] = 1 & (a[i >> 3] >> (i & 7)); + } - for(i = 0; i < 256; ++i) + for(size_t i = 0; i < 256; ++i) + { if(r[i]) { - for(b = 1; b <= 6 && i + b < 256; ++b) + for(size_t b = 1; b <= 6 && i + b < 256; ++b) { if(r[i + b]) { @@ -416,7 +414,7 @@ void slide(int8_t* r, const uint8_t* a) else if(r[i] - (r[i + b] << b) >= -15) { r[i] -= r[i + b] << b; - for(k = i + b; k < 256; ++k) + for(size_t k = i + b; k < 256; ++k) { if(!r[k]) { @@ -431,7 +429,7 @@ void slide(int8_t* r, const uint8_t* a) } } } - + } } void ge_tobytes(uint8_t* s, const ge_p2* h) @@ -619,23 +617,23 @@ void ge_double_scalarmult_vartime( if(aslide[i] > 0) { ge_p1p1_to_p3(&u, &t); - ge_add(&t, &u, &Ai[aslide[i]/2]); + ge_add(&t, &u, &Ai[aslide[i] >> 1]); } else if(aslide[i] < 0) { ge_p1p1_to_p3(&u, &t); - ge_sub(&t, &u, &Ai[(-aslide[i])/2]); + ge_sub(&t, &u, &Ai[(-aslide[i]) >> 1]); } if(bslide[i] > 0) { ge_p1p1_to_p3(&u, &t); - ge_madd(&t, &u, &Bi[bslide[i]/2]); + ge_madd(&t, &u, &Bi[bslide[i] >> 1]); } else if(bslide[i] < 0) { ge_p1p1_to_p3(&u, &t); - ge_msub(&t, &u, &Bi[(-bslide[i])/2]); + ge_msub(&t, &u, &Bi[(-bslide[i]) >> 1]); } ge_p1p1_to_p2(&r, &t); @@ -2013,7 +2011,7 @@ inline int32_t equal32(int8_t b, int8_t c) inline uint8_t negative(int8_t b) { - size_t x = b; /* 18446744073709551361..18446744073709551615: yes; 0..255: no */ + uint64_t x = b; /* 18446744073709551361..18446744073709551615: yes; 0..255: no */ x >>= 63; /* 1: yes; 0: no */ return x; } |