srp: replace custom powm with modpow (#78)

1 files changed, 0 insertions, 19 deletions

diff --git a/srp/src/tools.rs b/srp/src/tools.rs
deleted file mode 100644
index 7f7da0f..0000000
--- a/srp/src/tools.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-use num_bigint::BigUint;
-
-pub fn powm(base: &BigUint, exp: &BigUint, modulus: &BigUint) -> BigUint {
-    let zero = BigUint::from(0u32);
-    let one = BigUint::from(1u32);
-    let two = BigUint::from(2u32);
-    let mut exp = exp.clone();
-    let mut result = one.clone();
-    let mut base = base % modulus;
-
-    while exp > zero {
-        if &exp % &two == one {
-            result = (result * &base) % modulus;
-        }
-        exp >>= 1;
-        base = (&base * &base) % modulus;
-    }
-    result
-}