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[ctrtool] fixed keygen add()/sub() functions

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jakcron
2017-05-25 12:56:51 +08:00
parent 5c23014435
commit 183d95bffa
1 changed files with 0 additions and 27 deletions
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ctrtool/aes_keygen.c
-27
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@@ -45,14 +45,6 @@ void n128_add(const uint8_t *a, const uint8_t *b, uint8_t *out)
carry = sum >> 8; carry = sum >> 8;
out[i] = sum & 0xff; out[i] = sum & 0xff;
} }
while (carry != 0) {
for (int i = 15; i >= 0; i--) {
sum = out[i] + carry;
carry = sum >> 8;
out[i] = sum & 0xff;
}
}
} }
/* out = a - b /* out = a - b
@@ -77,25 +69,6 @@ void n128_sub(const uint8_t *a, const uint8_t *b, uint8_t *out)
// set value // set value
out[i] = sum & 0xff; out[i] = sum & 0xff;
} }
while (carry != 0) {
for (int i = 15; i >= 0; i--) {
sum = out[i] - carry;
// check to see if anything was borrowed from next byte
if (out[i] < carry) {
sum += 0x100;
carry = 1;
}
else {
carry = 0;
}
out[i] = sum & 0xff;
}
}
} }
void n128_xor(const uint8_t *a, const uint8_t *b, uint8_t *out) void n128_xor(const uint8_t *a, const uint8_t *b, uint8_t *out)