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Fix for pgm access issue on esp8266

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Ticket: https://github.com/rweather/arduinolibs/issues/20
This commit is contained in:
Rhys Weatherley 2018-02-18 09:09:17 +10:00
parent 06987988be
commit a2079e1708
1 changed files with 2 additions and 2 deletions
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4
libraries/Crypto/Curve25519.cpp
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@ -341,9 +341,9 @@ uint8_t Curve25519::isWeakPoint(const uint8_t k[32])
uint8_t result = 0;
for (uint8_t posn = 0; posn < 5; ++posn) {
const uint8_t *point = points[posn];
uint8_t check = (pgm_read_byte(point + 31) ^ k[31]) & 0x7F;
uint8_t check = (pgm_read_byte(&(point[31])) ^ k[31]) & 0x7F;
for (uint8_t index = 31; index > 0; --index)
check |= (pgm_read_byte(point + index - 1) ^ k[index - 1]);
check |= (pgm_read_byte(&(point[index - 1])) ^ k[index - 1]);
result |= (uint8_t)((((uint16_t)0x0100) - check) >> 8);
}