1 files changed, 77 insertions, 0 deletions
diff --git a/src/lib/asn1/asn1_print.h b/src/lib/asn1/asn1_print.h
new file mode 100644
index 000000000..0fd760e89
--- /dev/null
+++ b/src/lib/asn1/asn1_print.h
@@ -0,0 +1,77 @@
+/*
+* (C) 2014,2015,2017 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_ASN1_PRINT_H_
+#define BOTAN_ASN1_PRINT_H_
+
+#include <botan/types.h>
+#include <string>
+#include <vector>
+#include <iosfwd>
+
+namespace Botan {
+
+class BER_Decoder;
+
+/**
+* Format ASN.1 data into human readable strings
+*/
+class BOTAN_DLL ASN1_Pretty_Printer
+   {
+   public:
+      /**
+      * @param print_limit strings larger than this are not printed
+      * @param print_binary_limit binary strings larger than this are not printed
+      * @param print_context_specific if true, try to parse nested context specific data.
+      * @param initial_level the initial depth (0 or 1 are the only reasonable values)
+      * @param value_column ASN.1 values are lined up at this column in output
+      */
+      ASN1_Pretty_Printer(size_t print_limit = 256,
+                          size_t print_binary_limit = 256,
+                          bool print_context_specific = true,
+                          size_t initial_level = 0,
+                          size_t value_column = 60) :
+         m_print_limit(print_limit),
+         m_print_binary_limit(print_binary_limit),
+         m_initial_level(initial_level),
+         m_value_column(value_column),
+         m_print_context_specific(print_context_specific)
+         {}
+
+      void print_to_stream(std::ostream& out,
+                           const uint8_t in[],
+                           size_t len) const;
+
+      std::string print(const uint8_t in[], size_t len) const;
+
+      template<typename Alloc>
+      std::string print(const std::vector<uint8_t, Alloc>& vec) const
+         {
+         return print(vec.data(), vec.size());
+         }
+
+   private:
+      void emit(std::ostream& out,
+                const std::string& type,
+                size_t level, size_t length,
+                const std::string& value = "") const;
+
+      void decode(std::ostream& output,
+                  BER_Decoder& decoder,
+                  size_t level) const;
+
+      std::string format_binary(const std::vector<uint8_t>& in) const;
+
+      const size_t m_print_limit;
+      const size_t m_print_binary_limit;
+      const size_t m_initial_level;
+      const size_t m_value_column;
+      const bool m_print_context_specific;
+   };
+
+}
+
+#endif