diff options
Diffstat (limited to 'src/lib-otp/otp-parity.h')
-rw-r--r-- | src/lib-otp/otp-parity.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/lib-otp/otp-parity.h b/src/lib-otp/otp-parity.h new file mode 100644 index 0000000..86ea18f --- /dev/null +++ b/src/lib-otp/otp-parity.h @@ -0,0 +1,16 @@ +#ifndef OTP_PARITY_H +#define OTP_PARITY_H + +extern const unsigned char parity_table[256]; + +static inline unsigned int otp_parity(unsigned char *data) +{ + unsigned int i, parity = 0; + + for (i = 0; i < OTP_HASH_SIZE; i++) + parity += parity_table[*data++]; + + return parity & 3; +} + +#endif |