Revert OpenSSL conversion for SHA1-based hashes

Update local_encoding_functions to avoid FrozenError on encoding modules

lib/objects/local_encoding_functions.rb

@@ -25,7 +25,7 @@ class EncodingFunctions
     utf8 = []
     value.map {|element|
       if element.is_a? String
-        utf8 << element.force_encoding('UTF-8')
+        utf8 << element.dup.force_encoding('UTF-8')
       elsif element.is_a? Hash
         utf8 << EncodingFunctions::hash_to_utf8(element)
       elsif element.is_a? Array

modules/encoders/hash/sha1/secgen_local/local.rb

@@ -1,6 +1,5 @@
 #!/usr/bin/ruby
 require_relative '../../../../../lib/objects/local_hash_encoder.rb'
-require 'openssl'
 
 class SHA1Encoder < HashEncoder
   def initialize
@@ -9,7 +8,7 @@ class SHA1Encoder < HashEncoder
   end
 
   def hash_function(string)
-    OpenSSL::Digest::SHA1.new.hexdigest(string)
+    Digest::SHA1.hexdigest(string)
   end
 end
 

modules/encoders/hash/sha256/secgen_local/local.rb

@@ -1,6 +1,5 @@
 #!/usr/bin/ruby
 require_relative '../../../../../lib/objects/local_hash_encoder.rb'
-require 'openssl'
 
 class SHA256Encoder < HashEncoder
   def initialize
@@ -9,7 +8,7 @@ class SHA256Encoder < HashEncoder
   end
 
   def hash_function(string)
-    OpenSSL::Digest::SHA256.new.hexdigest(string)
+    Digest::SHA256.hexdigest(string)
   end
 end
 

modules/encoders/hash/sha384/secgen_local/local.rb

@@ -1,6 +1,5 @@
 #!/usr/bin/ruby
 require_relative '../../../../../lib/objects/local_hash_encoder.rb'
-require 'openssl'
 
 class SHA384Encoder < HashEncoder
   def initialize
@@ -9,7 +8,7 @@ class SHA384Encoder < HashEncoder
   end
 
   def hash_function(string)
-    OpenSSL::Digest::SHA384.new.hexdigest(string)
+    Digest::SHA384.hexdigest(string)
   end
 end
 

modules/encoders/hash/sha512/secgen_local/local.rb

@@ -1,6 +1,5 @@
 #!/usr/bin/ruby
 require_relative '../../../../../lib/objects/local_hash_encoder.rb'
-require 'openssl'
 
 class SHA512Encoder < HashEncoder
   def initialize
@@ -9,7 +8,7 @@ class SHA512Encoder < HashEncoder
   end
 
   def hash_function(string)
-    OpenSSL::Digest::SHA512.new.hexdigest(string)
+    Digest::SHA512.hexdigest(string)
   end
 end