v1.2.112 - kfun - asn_pow

NAME

asn_pow - raise one arbitrary size number to the power of another

SYNOPSIS

string asn_pow(string a, string b, string m)

DESCRIPTION

Compute a raised to the power b modulo m. The modulus must be larger than zero. Negative powers can only be used if an inverse modulo m exists. Arbitrary size numbers are encoded as strings, most significant byte first. The most significant bit in the first byte, when set, indicates that the number is negative and encoded in two's complement.

ERRORS

An error will result if the modulus is less than or equal to zero, or if b is negative and no inverse modulo m exists.

SEE ALSO

kfun/asn_add, kfun/asn_div, kfun/asn_mod, kfun/asn_mult, kfun/asn_sub