Initial checkin1.5.6

1 files changed, 64 insertions, 0 deletions

diff --git a/doc/examples/hash.cpp b/doc/examples/hash.cpp
new file mode 100644
index 000000000..a97cd6082
--- /dev/null
+++ b/doc/examples/hash.cpp
@@ -0,0 +1,64 @@
+/*
+Prints the message digest of files, using an arbitrary hash function
+chosen by the user. This is less flexible that I might like, for example:
+   ./hash sha1 some_file [or md5 or sha-1 or ripemd160 or ...]
+will not work, cause the name lookup is case-sensitive. Oh well...
+
+Written by Jack Lloyd ([email protected]), on August 4, 2002
+  - December 16, 2003: "Fixed" to accept "sha1" or "md5" as a hash name
+
+This file is in the public domain
+*/
+
+#include <iostream>
+#include <fstream>
+#include <botan/botan.h>
+
+int main(int argc, char* argv[])
+   {
+   if(argc < 3)
+      {
+      std::cout << "Usage: " << argv[0] << " digest <filenames>" << std::endl;
+      return 1;
+      }
+
+   Botan::LibraryInitializer init;
+
+   std::string hash = argv[1];
+   /* a couple of special cases, kind of a crock */
+   if(hash == "sha1") hash = "SHA-1";
+   if(hash == "md5")  hash = "MD5";
+
+   try {
+      if(!Botan::have_hash(hash))
+         {
+         std::cout << "Unknown hash \"" << argv[1] << "\"" << std::endl;
+         return 1;
+         }
+
+      Botan::Pipe pipe(new Botan::Hash_Filter(hash),
+                       new Botan::Hex_Encoder);
+
+      int skipped = 0;
+      for(int j = 2; argv[j] != 0; j++)
+         {
+         std::ifstream file(argv[j]);
+         if(!file)
+            {
+            std::cout << "ERROR: could not open " << argv[j] << std::endl;
+            skipped++;
+            continue;
+            }
+         pipe.start_msg();
+         file >> pipe;
+         pipe.end_msg();
+         pipe.set_default_msg(j-2-skipped);
+         std::cout << pipe << "  " << argv[j] << std::endl;
+         }
+   }
+   catch(std::exception& e)
+      {
+      std::cout << "Exception caught: " << e.what() << std::endl;
+      }
+   return 0;
+   }