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Adam Ierymenko 2019-08-14 12:48:45 -07:00
parent 573d3eea87
commit 8f5f7f1baa
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GPG key ID: 1657198823E52A61
8 changed files with 210 additions and 186 deletions
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164
node/Utils.cpp
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@ -85,6 +85,71 @@ char *Utils::decimal(unsigned long n,char s[24])
return s;
}
unsigned int Utils::unhex(const char *h,void *buf,unsigned int buflen)
{
unsigned int l = 0;
while (l < buflen) {
uint8_t hc = *(reinterpret_cast<const uint8_t *>(h++));
if (!hc) break;
uint8_t c = 0;
if ((hc >= 48)&&(hc <= 57)) // 0..9
c = hc - 48;
else if ((hc >= 97)&&(hc <= 102)) // a..f
c = hc - 87;
else if ((hc >= 65)&&(hc <= 70)) // A..F
c = hc - 55;
hc = *(reinterpret_cast<const uint8_t *>(h++));
if (!hc) break;
c <<= 4;
if ((hc >= 48)&&(hc <= 57))
c |= hc - 48;
else if ((hc >= 97)&&(hc <= 102))
c |= hc - 87;
else if ((hc >= 65)&&(hc <= 70))
c |= hc - 55;
reinterpret_cast<uint8_t *>(buf)[l++] = c;
}
return l;
}
unsigned int Utils::unhex(const char *h,unsigned int hlen,void *buf,unsigned int buflen)
{
unsigned int l = 0;
const char *hend = h + hlen;
while (l < buflen) {
if (h == hend) break;
uint8_t hc = *(reinterpret_cast<const uint8_t *>(h++));
if (!hc) break;
uint8_t c = 0;
if ((hc >= 48)&&(hc <= 57))
c = hc - 48;
else if ((hc >= 97)&&(hc <= 102))
c = hc - 87;
else if ((hc >= 65)&&(hc <= 70))
c = hc - 55;
if (h == hend) break;
hc = *(reinterpret_cast<const uint8_t *>(h++));
if (!hc) break;
c <<= 4;
if ((hc >= 48)&&(hc <= 57))
c |= hc - 48;
else if ((hc >= 97)&&(hc <= 102))
c |= hc - 87;
else if ((hc >= 65)&&(hc <= 70))
c |= hc - 55;
reinterpret_cast<uint8_t *>(buf)[l++] = c;
}
return l;
}
void Utils::getSecureRandom(void *buf,unsigned int bytes)
{
static Mutex globalLock;
@ -105,8 +170,12 @@ void Utils::getSecureRandom(void *buf,unsigned int bytes)
if (!s20Initialized) {
s20Initialized = true;
uint64_t s20Key[4];
s20Key[0] = (uint64_t)time(0); // system clock
s20Key[0] = (uint64_t)time(nullptr);
#ifdef __WINDOWS__
s20Key[1] = (uint64_t)buf; // address of buf
#else
s20Key[1] = (uint64_t)getpid();
#endif
s20Key[2] = (uint64_t)s20Key; // address of s20Key[]
s20Key[3] = (uint64_t)&s20; // address of s20
s20.init(s20Key,s20Key);
@ -171,6 +240,42 @@ void Utils::getSecureRandom(void *buf,unsigned int bytes)
#endif // __WINDOWS__ or not
}
int Utils::b32e(const uint8_t *data,int length,char *result,int bufSize)
{
if (length < 0 || length > (1 << 28)) {
result[0] = (char)0;
return -1;
}
int count = 0;
if (length > 0) {
int buffer = data[0];
int next = 1;
int bitsLeft = 8;
while (count < bufSize && (bitsLeft > 0 || next < length)) {
if (bitsLeft < 5) {
if (next < length) {
buffer <<= 8;
buffer |= data[next++] & 0xFF;
bitsLeft += 8;
} else {
int pad = 5 - bitsLeft;
buffer <<= pad;
bitsLeft += pad;
}
}
int index = 0x1F & (buffer >> (bitsLeft - 5));
bitsLeft -= 5;
result[count++] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567"[index];
}
}
if (count < bufSize) {
result[count] = (char)0;
return count;
}
result[0] = (char)0;
return -1;
}
int Utils::b32d(const char *encoded,uint8_t *result,int bufSize)
{
int buffer = 0;
@ -211,42 +316,6 @@ int Utils::b32d(const char *encoded,uint8_t *result,int bufSize)
return count;
}
int Utils::b32e(const uint8_t *data,int length,char *result,int bufSize)
{
if (length < 0 || length > (1 << 28)) {
result[0] = (char)0;
return -1;
}
int count = 0;
if (length > 0) {
int buffer = data[0];
int next = 1;
int bitsLeft = 8;
while (count < bufSize && (bitsLeft > 0 || next < length)) {
if (bitsLeft < 5) {
if (next < length) {
buffer <<= 8;
buffer |= data[next++] & 0xFF;
bitsLeft += 8;
} else {
int pad = 5 - bitsLeft;
buffer <<= pad;
bitsLeft += pad;
}
}
int index = 0x1F & (buffer >> (bitsLeft - 5));
bitsLeft -= 5;
result[count++] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567"[index];
}
}
if (count < bufSize) {
result[count] = (char)0;
return count;
}
result[0] = (char)0;
return -1;
}
unsigned int Utils::b64e(const uint8_t *in,unsigned int inlen,char *out,unsigned int outlen)
{
static const char base64en[64] = { 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/' };
@ -326,4 +395,25 @@ unsigned int Utils::b64d(const char *in,unsigned char *out,unsigned int outlen)
return j;
}
#define ROL64(x,k) (((x) << (k)) | ((x) >> (64 - (k))))
uint64_t Utils::random()
{
// https://en.wikipedia.org/wiki/Xorshift#xoshiro256**
static Mutex l;
static uint64_t s[4] = { Utils::getSecureRandom64(),Utils::getSecureRandom64(),Utils::getSecureRandom64(),Utils::getSecureRandom64() };
l.lock();
const uint64_t result = ROL64(s[1] * 5,7) * 9;
const uint64_t t = s[1] << 17;
s[2] ^= s[0];
s[3] ^= s[1];
s[1] ^= s[2];
s[0] ^= s[3];
s[2] ^= t;
s[3] = ROL64(s[3],45);
l.unlock();
return result;
}
} // namespace ZeroTier