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ringct: some more small optimizations

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moneromooo-monero
2016-10-23 16:10:17 +01:00
parent 4f6ea2eb6a
commit 59f0d4b574
2 changed files with 25 additions and 58 deletions
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59
src/ringct/rctOps.cpp
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@@ -37,50 +37,12 @@ namespace rct {
//Various key initialization functions
//Creates a zero scalar
void zero(key &zero) {
memset(&zero, 0, 32);
}
//Creates a zero scalar
key zero() {
static const key z = { {0x00, 0x00, 0x00,0x00 , 0x00, 0x00, 0x00,0x00 , 0x00, 0x00, 0x00,0x00 , 0x00, 0x00, 0x00,0x00 , 0x00, 0x00, 0x00,0x00 , 0x00, 0x00, 0x00,0x00 , 0x00, 0x00, 0x00,0x00 , 0x00, 0x00, 0x00,0x00 } };
return z;
}
//Creates a zero elliptic curve point
void identity(key &Id) {
Id[0] = (unsigned char)(0x01);
memset(Id.bytes+1, 0, 31);
}
//Creates a zero elliptic curve point
key identity() {
key Id;
Id[0] = (unsigned char)(0x01);
memset(Id.bytes+1, 0, 31);
return Id;
}
//copies a scalar or point
void copy(key &AA, const key &A) {
memcpy(&AA, &A, 32);
}
//copies a scalar or point
key copy(const key &A) {
key AA;
memcpy(&AA, &A, 32);
return AA;
}
//initializes a key matrix;
//first parameter is rows,
//second is columns
keyM keyMInit(int rows, int cols) {
keyM keyMInit(size_t rows, size_t cols) {
keyM rv(cols);
int i = 0;
size_t i = 0;
for (i = 0 ; i < cols ; i++) {
rv[i] = keyV(rows);
}
@@ -107,11 +69,12 @@ namespace rct {
//Generates a vector of secret key
//Mainly used in testing
keyV skvGen(int rows ) {
keyV skvGen(size_t rows ) {
keyV rv(rows);
int i = 0;
size_t i = 0;
crypto::rand(rows * sizeof(key), (uint8_t*)&rv[0]);
for (i = 0 ; i < rows ; i++) {
skGen(rv[i]);
sc_reduce32(rv[i].bytes);
}
return rv;
}
@@ -155,7 +118,7 @@ namespace rct {
//generates a <secret , public> / Pedersen commitment but takes bH as input
tuple<ctkey, ctkey> ctskpkGen(key bH) {
tuple<ctkey, ctkey> ctskpkGen(const key &bH) {
ctkey sk, pk;
skpkGen(sk.dest, pk.dest);
skpkGen(sk.mask, pk.mask);
@@ -172,12 +135,12 @@ namespace rct {
return mask;
}
key commit(xmr_amount amount, key mask) {
mask = scalarmultBase(mask);
key commit(xmr_amount amount, const key &mask) {
key c = scalarmultBase(mask);
key am = d2h(amount);
key bH = scalarmultH(am);
addKeys(mask, mask, bH);
return mask;
addKeys(c, c, bH);
return c;
}
//generates a random uint long long (for testing)