scrypt: update to new function name

Author: raggi

lib/bitcoin.rb

@@ -325,7 +325,7 @@ def litecoin_hash(hex)
       bytes = [hex].pack("H*").reverse
       begin
         require "scrypt" unless defined?(::SCrypt)
-        hash = SCrypt::Engine.__sc_crypt(bytes, bytes, 1024, 1, 1, 32)
+        hash = SCrypt::Engine.scrypt(bytes, bytes, 1024, 1, 1, 32)
       rescue LoadError
         hash = Litecoin::Scrypt.scrypt_1024_1_1_256_sp(bytes)
       end

lib/bitcoin/key.rb

@@ -183,7 +183,7 @@ def to_bip38(passphrase)
       addresshash = Digest::SHA256.digest( Digest::SHA256.digest( self.addr ) )[0...4]
 
       require 'scrypt' unless defined?(::SCrypt::Engine)
-      buf = SCrypt::Engine.__sc_crypt(passphrase, addresshash, 16384, 8, 8, 64)
+      buf = SCrypt::Engine.scrypt(passphrase, addresshash, 16384, 8, 8, 64)
       derivedhalf1, derivedhalf2 = buf[0...32], buf[32..-1]
 
       aes = proc{|k,a,b|
@@ -212,7 +212,7 @@ def self.from_bip38(encrypted_privkey, passphrase)
       raise "Invalid checksum"  unless Digest::SHA256.digest(Digest::SHA256.digest(version + flagbyte + addresshash + encryptedhalf1 + encryptedhalf2))[0...4] == checksum
 
       require 'scrypt' unless defined?(::SCrypt::Engine)
-      buf = SCrypt::Engine.__sc_crypt(passphrase, addresshash, 16384, 8, 8, 64)
+      buf = SCrypt::Engine.scrypt(passphrase, addresshash, 16384, 8, 8, 64)
       derivedhalf1, derivedhalf2 = buf[0...32], buf[32..-1]
 
       aes = proc{|k,a|

lib/bitcoin/litecoin.rb

@@ -68,7 +68,7 @@ def xor_salsa8(a, b, a_offset, b_offset)
 
   begin
     require "scrypt"
-    hash = SCrypt::Engine.__sc_crypt(secret_bytes, secret_bytes, 1024, 1, 1, 32)
+    hash = SCrypt::Engine.scrypt(secret_bytes, secret_bytes, 1024, 1, 1, 32)
     p hash.reverse.unpack("H*")[0] == "00000000002bef4107f882f6115e0b01f348d21195dacd3582aa2dabd7985806"
   rescue LoadError
     puts "scrypt gem not found, using native scrypt"
@@ -77,7 +77,7 @@ def xor_salsa8(a, b, a_offset, b_offset)
 
   require 'benchmark'
   Benchmark.bmbm{|x|
-    x.report("v1"){ SCrypt::Engine.__sc_crypt(secret_bytes, secret_bytes, 1024, 1, 1, 32).reverse.unpack("H*") rescue nil }
+    x.report("v1"){ SCrypt::Engine.scrypt(secret_bytes, secret_bytes, 1024, 1, 1, 32).reverse.unpack("H*") rescue nil }
     x.report("v2"){ Litecoin::Scrypt.scrypt_1024_1_1_256_sp(secret_bytes).reverse.unpack("H*")[0] }
   }
 end