1 files changed, 6 insertions, 9 deletions
diff --git a/lib/srp/util.rb b/lib/srp/util.rb
index bf4c248..66bd9e7 100644
--- a/lib/srp/util.rb
+++ b/lib/srp/util.rb
@@ -10,7 +10,7 @@ module SRP
 115b8b692e0e045692cf280b436735c77a5a9e8a9e7ed56c965f87db5b2a2ece3
     EOS
 
-    BIG_PRIME_N = <<-EOS # 1024 bits modulus (N)
+    BIG_PRIME_N = <<-EOS.split.join.hex # 1024 bits modulus (N)
 eeaf0ab9adb38dd69c33f80afa8fc5e86072618775ff3c0b9ea2314c9c25657
 6d674df7496ea81d3383b4813d692c6e0e0d5d8e250b98be48e495c1d6089da
 d15dc7d7b46154d6b6ce8ef4ad69b15d4982559b297bcf1885c529f566660e5
@@ -43,21 +43,18 @@ d15dc7d7b46154d6b6ce8ef4ad69b15d4982559b297bcf1885c529f566660e5
     end
 
     def multiplier
-      return "c46d46600d87fef149bd79b81119842f3c20241fda67d06ef412d8f6d9479c58".hex % PRIME_N
       @k ||= calculate_multiplier
     end
 
     protected
 
     def calculate_multiplier
-      n = PRIME_N
+      n = BIG_PRIME_N
       g = GENERATOR
-      nhex = '%x' % [n]
-      nlen = nhex.length + (nhex.length.odd? ? 1 : 0 )
-      ghex = '%x' % [g]
-      hashin = '0' * (nlen - nhex.length) + nhex \
-        + '0' * (nlen - ghex.length) + ghex
-      sha256_hex(hashin).hex % n
+      nhex = '%x' % n
+      ghex = '0%x' % g
+      hashin = [nhex].pack('H*') + [ghex].pack('H*')
+      sha256_str(hashin).hex
     end
 
     def calculate_m(aa, bb, s)