Add string(MD5) and string(SHA*) commands to compute hashes

Provide a CMake-language binding to these cryptographic hashes.  Add a
string() command API for MD5, SHA1, SHA224, SHA256, SHA384, and SHA512.

1 files changed, 32 insertions, 0 deletions

diff --git a/Source/cmStringCommand.cxx b/Source/cmStringCommand.cxx
index d239c06..f2f2681 100644
--- a/Source/cmStringCommand.cxx
+++ b/Source/cmStringCommand.cxx
@@ -10,6 +10,8 @@
   See the License for more information.
 ============================================================================*/
 #include "cmStringCommand.h"
+#include "cmCryptoHash.h"
+
 #include <cmsys/RegularExpression.hxx>
 #include <cmsys/SystemTools.hxx>
 
@@ -36,6 +38,15 @@ bool cmStringCommand
     {
     return this->HandleReplaceCommand(args);
     }
+  else if ( subCommand == "MD5" ||
+            subCommand == "SHA1" ||
+            subCommand == "SHA224" ||
+            subCommand == "SHA256" ||
+            subCommand == "SHA384" ||
+            subCommand == "SHA512" )
+    {
+    return this->HandleHashCommand(args);
+    }
   else if(subCommand == "TOLOWER")
     {
     return this->HandleToUpperLowerCommand(args, false);
@@ -83,6 +94,27 @@ bool cmStringCommand
 }
 
 //----------------------------------------------------------------------------
+bool cmStringCommand::HandleHashCommand(std::vector<std::string> const& args)
+{
+  if(args.size() != 3)
+    {
+    cmOStringStream e;
+    e << args[0] << " requires an output variable and an input string";
+    this->SetError(e.str().c_str());
+    return false;
+    }
+
+  cmsys::auto_ptr<cmCryptoHash> hash(cmCryptoHash::New(args[0].c_str()));
+  if(hash.get())
+    {
+    std::string out = hash->HashString(args[2].c_str());
+    this->Makefile->AddDefinition(args[1].c_str(), out.c_str());
+    return true;
+    }
+  return false;
+}
+
+//----------------------------------------------------------------------------
 bool cmStringCommand::HandleToUpperLowerCommand(
   std::vector<std::string> const& args, bool toUpper)
 {