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byte_start(3)		    Library Functions Manual		   byte_start(3)

NAME
     byte_start - find out if string b is prefix of string a

SYNTAX
     #include <libowfat/byte.h>

     int byte_start(const char *a,size_t alen,const char *b,size_t blen);

DESCRIPTION
     byte_start  returns 1 if alen >= blen and the first blen bytes from a and b
     are equal.

     When blen is too large or the strings are different,  byte_start  does  not
     read  bytes  past the first difference. An attacker observing the execution
     timing can thus learn where the first mismatch happened.

     Use byte_equal_notimingattack to  compare	keys,  passphrases,  cookies  or
     hashes instead.

SEE ALSO
     byte_equal(3), byte_equal_notimingattack(3), byte_starts(3)

								   byte_start(3)

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