* ext/openssl/ossl_cipher.c (ossl_cipher_update): input data must

  not be empty. [ruby-talk:161220]

* test/openssl/test_cipher.rb: add test for Cipher#update("").


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9485 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/openssl/ossl_cipher.c

@@ -224,7 +224,8 @@ ossl_cipher_update(VALUE self, VALUE data)
 
  StringValue(data);
  in = RSTRING(data)->ptr;
- in_len = RSTRING(data)->len;
+ if ((in_len = RSTRING(data)->len) == 0)
+ rb_raise(rb_eArgError, "data must not be empty");
  GetCipher(self, ctx);
  str = rb_str_new(0, in_len+EVP_CIPHER_CTX_block_size(ctx));
  if (!EVP_CipherUpdate(ctx, RSTRING(str)->ptr, &out_len, in, in_len))

test/test_cipher.rb

@@ -57,6 +57,11 @@ def test_reset
  s2 = @c1.update(@data) + @c1.final
  assert_equal(s1, s2, "encrypt reset")
  end
+
+ def test_empty_data
+ @c1.encrypt
+ assert_raises(ArgumentError){ @c1.update("") }
+ end
 end
 
 end