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/*
* ecgen, tool for generating Elliptic curve domain parameters
* Copyright (C) 2017 J08nY
*/
random_primer(range:vec) = {
local(p:int);
until(isprime(p),
p = randomprime(range):int;
);
return(p);
}
/**
* Calculates a random prime of bit size bits.
*
* @param bits bit size of the requested prime
* @return random prime between 2^(bits - 1) and 2^bits
*/
random_prime(bits:small) = {
return(random_primer([2^(bits-1), 2^bits]));
}
random_intr(range:vec) = {
return(random(range));
}
/**
* Generates a random integer with bit size bits.
*
* @param bits bit size of the requested integer
* @return random int between 2^(bits - 1) and 2^bits
*/
random_int(bits:small) = {
return(random_intr([2^(bits-1), 2^bits]));
}
/**
* Converts a list to a vector.
*
* @param l list to convert
* @return a vector of the lists values
*/
list_to_vec(l:list) = {
local(v:vec, n:int);
n = length(l);
v = vector(n);
for(i=1, n,
v[i] = l[i];
);
return(v);
}
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