basic implementation of OoxmlCryptNative

Author: ashkulz

ext/ooxml_crypt/extconf.rb

@@ -2,4 +2,17 @@
 
 require "mkmf"
 
+# force usage of the C++ compiler
+have_library("stdc++")
+
+# check for OpenSSL
+abort("Please install OpenSSL development libraries!") unless have_header("openssl/hmac.h") && have_library("crypto")
+
+# setup build configuration
+vendor = File.realpath(File.join(__dir__, "..", "..", "vendor"))
+$INCFLAGS << " -I#{vendor}/cybozulib/include -I#{vendor}/msoffice/include"
+$VPATH << "#{vendor}/msoffice/src"
+$srcs = ["ooxml_crypt.c", "msocdll.cpp"]
+
+# create makefile
 create_makefile("ooxml_crypt/ooxml_crypt")

ext/ooxml_crypt/ooxml_crypt.c

@@ -1,6 +1,27 @@
 #include "ooxml_crypt.h"
 
+VALUE rb_encrypt_file(VALUE self, VALUE inFile, VALUE password, VALUE outFile)
+{
+  char *out  = StringValueCStr(outFile);
+  char *in   = StringValueCStr(inFile);
+  char *pass = StringValueCStr(password);
+
+  return INT2FIX(MSOC_encryptA(out, in, pass, NULL));
+}
+
+VALUE rb_decrypt_file(VALUE self, VALUE inFile, VALUE password, VALUE outFile)
+{
+  char *out  = StringValueCStr(outFile);
+  char *in   = StringValueCStr(inFile);
+  char *pass = StringValueCStr(password);
+
+  return INT2FIX(MSOC_decryptA(out, in, pass, NULL));
+}
+
 void Init_ooxml_crypt(void)
 {
   VALUE mod = rb_define_module("OoxmlCryptNative");
+
+  rb_define_module_function(mod, "encrypt_file", rb_encrypt_file, 3);
+  rb_define_module_function(mod, "decrypt_file", rb_decrypt_file, 3);
 }

ext/ooxml_crypt/ooxml_crypt.h

@@ -2,5 +2,6 @@
 #define OOXML_CRYPT_H 1
 
 #include "ruby.h"
+#include "msoc.h"
 
 #endif /* OOXML_CRYPT_H */