1 files changed, 153 insertions, 0 deletions
diff --git a/src/conf.cpp b/src/conf.cpp
new file mode 100644
index 000000000..6fa616b3c
--- /dev/null
+++ b/src/conf.cpp
@@ -0,0 +1,153 @@
+/*************************************************
+* Configuration Handling Source File             *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/conf.h>
+#include <botan/libstate.h>
+#include <botan/lookup.h>
+#include <botan/charset.h>
+#include <botan/parsing.h>
+#include <string>
+
+namespace Botan {
+
+namespace Config {
+
+/*************************************************
+* Set an option                                  *
+*************************************************/
+void set(const std::string& name, const std::string& value, bool overwrite)
+   {
+   global_state().set_option("conf", name, value, overwrite);
+   }
+
+/*************************************************
+* Get the value of an option as a string         *
+*************************************************/
+std::string get_string(const std::string& name)
+   {
+   return global_state().get_option("conf", name);
+   }
+
+/*************************************************
+* Get the value as a list of strings             *
+*************************************************/
+std::vector<std::string> get_list(const std::string& name)
+   {
+   return split_on(get_string(name), ':');
+   }
+
+/*************************************************
+* Get the value as a u32bit                      *
+*************************************************/
+u32bit get_u32bit(const std::string& name)
+   {
+   return parse_expr(get_string(name));
+   }
+
+/*************************************************
+* Get the value as a time                        *
+*************************************************/
+u32bit get_time(const std::string& name)
+   {
+   const std::string timespec = get_string(name);
+   if(timespec == "")
+      return 0;
+
+   const char suffix = timespec[timespec.size()-1];
+   std::string value = timespec.substr(0, timespec.size()-1);
+
+   u32bit scale = 1;
+
+   if(is_digit(suffix))
+      value += suffix;
+   else if(suffix == 's')
+      scale = 1;
+   else if(suffix == 'm')
+      scale = 60;
+   else if(suffix == 'h')
+      scale = 60 * 60;
+   else if(suffix == 'd')
+      scale = 24 * 60 * 60;
+   else if(suffix == 'y')
+      scale = 365 * 24 * 60 * 60;
+   else
+      throw Decoding_Error("Config::get_time: Unknown time value " + value);
+
+   return scale * to_u32bit(value);
+   }
+
+/*************************************************
+* Get the value as a boolean                     *
+*************************************************/
+bool get_bool(const std::string& name)
+   {
+   const std::string value = get_string(name);
+   if(value == "0" || value == "false")
+      return false;
+   if(value == "1" || value == "true")
+      return true;
+   throw Decoding_Error("Config::get_bool: Unknown boolean value " + value);
+   }
+
+/*************************************************
+* Choose the signature format for a PK algorithm *
+*************************************************/
+void choose_sig_format(const std::string& algo_name, std::string& padding,
+                       Signature_Format& format)
+   {
+   std::string dummy;
+   choose_sig_format(algo_name, padding, dummy, format);
+   }
+
+/*************************************************
+* Choose the signature format for a PK algorithm *
+*************************************************/
+void choose_sig_format(const std::string& algo_name, std::string& padding,
+                       std::string& hash, Signature_Format& format)
+   {
+   if(algo_name == "RSA")
+      {
+      hash = deref_alias(get_string("x509/ca/rsa_hash"));
+      if(hash == "")
+         throw Invalid_State("No value set for x509/ca/rsa_hash");
+
+      padding = "EMSA3(" + hash + ")";
+      format = IEEE_1363;
+      }
+   else if(algo_name == "DSA")
+      {
+      hash = deref_alias("SHA-1");
+      padding = "EMSA1(" + hash + ")";
+      format = DER_SEQUENCE;
+      }
+   else
+      throw Invalid_Argument("Unknown X.509 signing key type: " + algo_name);
+   }
+
+}
+
+/*************************************************
+* Add an alias for an algorithm                  *
+*************************************************/
+void add_alias(const std::string& alias, const std::string& official_name)
+   {
+   if(alias == "" || official_name == "")
+      return;
+
+   global_state().set_option("alias", alias, official_name);
+   }
+
+/*************************************************
+* Dereference an alias                           *
+*************************************************/
+std::string deref_alias(const std::string& name)
+   {
+   std::string result = name;
+   while(global_state().option_set("alias", result))
+      result = global_state().get_option("alias", result);
+   return result;
+   }
+
+}