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RingBuffer<> is now templated with size, buffer is now static.

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This commit is contained in:
Adam Ierymenko 2019-03-22 14:39:52 -07:00
parent af3ec000a0
commit d530356055
6 changed files with 95 additions and 247 deletions
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121
node/Poly1305.cpp
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@ -18,115 +18,6 @@ Public domain.
namespace ZeroTier {
#if 0
// "Naive" implementation, which is slower... might still want this on some older
// or weird platforms if the later versions have issues.
static inline void add(unsigned int h[17],const unsigned int c[17])
{
unsigned int j;
unsigned int u;
u = 0;
for (j = 0;j < 17;++j) { u += h[j] + c[j]; h[j] = u & 255; u >>= 8; }
}
static inline void squeeze(unsigned int h[17])
{
unsigned int j;
unsigned int u;
u = 0;
for (j = 0;j < 16;++j) { u += h[j]; h[j] = u & 255; u >>= 8; }
u += h[16]; h[16] = u & 3;
u = 5 * (u >> 2);
for (j = 0;j < 16;++j) { u += h[j]; h[j] = u & 255; u >>= 8; }
u += h[16]; h[16] = u;
}
static const unsigned int minusp[17] = {
5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 252
} ;
static inline void freeze(unsigned int h[17])
{
unsigned int horig[17];
unsigned int j;
unsigned int negative;
for (j = 0;j < 17;++j) horig[j] = h[j];
add(h,minusp);
negative = -(h[16] >> 7);
for (j = 0;j < 17;++j) h[j] ^= negative & (horig[j] ^ h[j]);
}
static inline void mulmod(unsigned int h[17],const unsigned int r[17])
{
unsigned int hr[17];
unsigned int i;
unsigned int j;
unsigned int u;
for (i = 0;i < 17;++i) {
u = 0;
for (j = 0;j <= i;++j) u += h[j] * r[i - j];
for (j = i + 1;j < 17;++j) u += 320 * h[j] * r[i + 17 - j];
hr[i] = u;
}
for (i = 0;i < 17;++i) h[i] = hr[i];
squeeze(h);
}
static inline int crypto_onetimeauth(unsigned char *out,const unsigned char *in,unsigned long long inlen,const unsigned char *k)
{
unsigned int j;
unsigned int r[17];
unsigned int h[17];
unsigned int c[17];
r[0] = k[0];
r[1] = k[1];
r[2] = k[2];
r[3] = k[3] & 15;
r[4] = k[4] & 252;
r[5] = k[5];
r[6] = k[6];
r[7] = k[7] & 15;
r[8] = k[8] & 252;
r[9] = k[9];
r[10] = k[10];
r[11] = k[11] & 15;
r[12] = k[12] & 252;
r[13] = k[13];
r[14] = k[14];
r[15] = k[15] & 15;
r[16] = 0;
for (j = 0;j < 17;++j) h[j] = 0;
while (inlen > 0) {
for (j = 0;j < 17;++j) c[j] = 0;
for (j = 0;(j < 16) && (j < inlen);++j) c[j] = in[j];
c[j] = 1;
in += j; inlen -= j;
add(h,c);
mulmod(h,r);
}
freeze(h);
for (j = 0;j < 16;++j) c[j] = k[j + 16];
c[16] = 0;
add(h,c);
for (j = 0;j < 16;++j) out[j] = h[j];
return 0;
}
void Poly1305::compute(void *auth,const void *data,unsigned int len,const void *key)
{
crypto_onetimeauth((unsigned char *)auth,(const unsigned char *)data,len,(const unsigned char *)key);
}
#endif
namespace {
typedef struct poly1305_context {
@ -215,8 +106,7 @@ static inline void U64TO8(unsigned char *p, unsigned long long v)
#define U64TO8(p,v) ((*reinterpret_cast<unsigned long long *>(p)) = (v))
#endif
static inline void
poly1305_init(poly1305_context *ctx, const unsigned char key[32]) {
static inline void poly1305_init(poly1305_context *ctx, const unsigned char key[32]) {
poly1305_state_internal_t *st = (poly1305_state_internal_t *)ctx;
unsigned long long t0,t1;
@ -241,8 +131,7 @@ poly1305_init(poly1305_context *ctx, const unsigned char key[32]) {
st->final = 0;
}
static inline void
poly1305_blocks(poly1305_state_internal_t *st, const unsigned char *m, size_t bytes) {
static inline void poly1305_blocks(poly1305_state_internal_t *st, const unsigned char *m, size_t bytes) {
const unsigned long long hibit = (st->final) ? 0 : ((unsigned long long)1 << 40); /* 1 << 128 */
unsigned long long r0,r1,r2;
unsigned long long s1,s2;
@ -293,8 +182,7 @@ poly1305_blocks(poly1305_state_internal_t *st, const unsigned char *m, size_t by
st->h[2] = h2;
}
static inline void
poly1305_finish(poly1305_context *ctx, unsigned char mac[16]) {
static inline void poly1305_finish(poly1305_context *ctx, unsigned char mac[16]) {
poly1305_state_internal_t *st = (poly1305_state_internal_t *)ctx;
unsigned long long h0,h1,h2,c;
unsigned long long g0,g1,g2;
@ -582,8 +470,7 @@ poly1305_finish(poly1305_context *ctx, unsigned char mac[16]) {
#endif // MSC/GCC or not
static inline void
poly1305_update(poly1305_context *ctx, const unsigned char *m, size_t bytes) {
static inline void poly1305_update(poly1305_context *ctx, const unsigned char *m, size_t bytes) {
poly1305_state_internal_t *st = (poly1305_state_internal_t *)ctx;
size_t i;