ringct: some more small optimizations
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moneromooo-monero
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4f6ea2eb6a
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59f0d4b574
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@ -37,50 +37,12 @@ namespace rct {
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//Various key initialization functions
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//Creates a zero scalar
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void zero(key &zero) {
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memset(&zero, 0, 32);
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}
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//Creates a zero scalar
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key zero() {
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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 } };
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return z;
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}
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//Creates a zero elliptic curve point
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void identity(key &Id) {
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Id[0] = (unsigned char)(0x01);
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memset(Id.bytes+1, 0, 31);
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}
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//Creates a zero elliptic curve point
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key identity() {
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key Id;
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Id[0] = (unsigned char)(0x01);
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memset(Id.bytes+1, 0, 31);
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return Id;
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}
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//copies a scalar or point
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void copy(key &AA, const key &A) {
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memcpy(&AA, &A, 32);
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}
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//copies a scalar or point
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key copy(const key &A) {
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key AA;
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memcpy(&AA, &A, 32);
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return AA;
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}
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//initializes a key matrix;
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//first parameter is rows,
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//second is columns
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keyM keyMInit(int rows, int cols) {
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keyM keyMInit(size_t rows, size_t cols) {
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keyM rv(cols);
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int i = 0;
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size_t i = 0;
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for (i = 0 ; i < cols ; i++) {
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rv[i] = keyV(rows);
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}
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@ -107,11 +69,12 @@ namespace rct {
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//Generates a vector of secret key
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//Mainly used in testing
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keyV skvGen(int rows ) {
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keyV skvGen(size_t rows ) {
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keyV rv(rows);
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int i = 0;
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size_t i = 0;
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crypto::rand(rows * sizeof(key), (uint8_t*)&rv[0]);
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for (i = 0 ; i < rows ; i++) {
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skGen(rv[i]);
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sc_reduce32(rv[i].bytes);
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}
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return rv;
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}
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@ -155,7 +118,7 @@ namespace rct {
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//generates a <secret , public> / Pedersen commitment but takes bH as input
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tuple<ctkey, ctkey> ctskpkGen(key bH) {
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tuple<ctkey, ctkey> ctskpkGen(const key &bH) {
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ctkey sk, pk;
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skpkGen(sk.dest, pk.dest);
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skpkGen(sk.mask, pk.mask);
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@ -172,12 +135,12 @@ namespace rct {
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return mask;
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}
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key commit(xmr_amount amount, key mask) {
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mask = scalarmultBase(mask);
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key commit(xmr_amount amount, const key &mask) {
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key c = scalarmultBase(mask);
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key am = d2h(amount);
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key bH = scalarmultH(am);
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addKeys(mask, mask, bH);
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return mask;
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addKeys(c, c, bH);
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return c;
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}
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//generates a random uint long long (for testing)
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@ -64,19 +64,23 @@ namespace rct {
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//Various key initialization functions
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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 } };
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static const key I = { {0x01, 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 } };
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//Creates a zero scalar
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key zero();
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void zero(key &z);
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inline key zero() { return Z; }
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inline void zero(key &z) { memset(&z, 0, 32); }
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//Creates a zero elliptic curve point
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key identity();
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void identity(key &Id);
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inline key identity() { return I; }
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inline void identity(key &Id) { memcpy(&Id, &I, 32); }
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//copies a scalar or point
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void copy(key &AA, const key &A);
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key copy(const key & AA);
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inline void copy(key &AA, const key &A) { memcpy(&AA, &A, 32); }
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inline key copy(const key & A) { key AA; memcpy(&AA, &A, 32); return AA; }
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//initializes a key matrix;
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//first parameter is rows,
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//second is columns
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keyM keyMInit(int, int);
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keyM keyMInit(size_t rows, size_t cols);
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//Various key generation functions
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@ -85,7 +89,7 @@ namespace rct {
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void skGen(key &);
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//generates a vector of secret keys of size "int"
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keyV skvGen(int );
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keyV skvGen(size_t rows );
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//generates a random curve point (for testing)
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key pkGen();
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@ -97,9 +101,9 @@ namespace rct {
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//generates C =aG + bH from b, a is random
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void genC(key & C, const key & a, xmr_amount amount);
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//this one is mainly for testing, can take arbitrary amounts..
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tuple<ctkey, ctkey> ctskpkGen(key bH);
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tuple<ctkey, ctkey> ctskpkGen(const key &bH);
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// make a pedersen commitment with given key
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key commit(xmr_amount amount, key mask);
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key commit(xmr_amount amount, const key &mask);
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// make a pedersen commitment with zero key
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key zeroCommit(xmr_amount amount);
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//generates a random uint long long
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