1 files changed, 108 insertions, 0 deletions
diff --git a/apt-pkg/contrib/sha2.h b/apt-pkg/contrib/sha2.h
new file mode 100644
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+++ b/apt-pkg/contrib/sha2.h
@@ -0,0 +1,108 @@
+// -*- mode: cpp; mode: fold -*-
+// Description                                                          /*{{{*/
+/* ######################################################################
+
+   SHA{512,256}SumValue - Storage for a SHA-{512,256} hash.
+   SHA{512,256}Summation - SHA-{512,256} Secure Hash Algorithm.
+   
+   This is a C++ interface to a set of SHA{512,256}Sum functions, that mirrors
+   the equivalent MD5 & SHA1 classes. 
+
+   ##################################################################### */
+                                                                        /*}}}*/
+#ifndef APTPKG_SHA2_H
+#define APTPKG_SHA2_H
+
+#include <cstring>
+
+#include "hashsum_template.h"
+#include "sha2_internal.h"
+
+#ifndef APT_10_CLEANER_HEADERS
+#include <algorithm>
+#include <string>
+#include <stdint.h>
+#endif
+
+
+typedef HashSumValue<512> SHA512SumValue;
+typedef HashSumValue<256> SHA256SumValue;
+
+class SHA2SummationBase : public SummationImplementation
+{
+ protected:
+   bool Done;
+ public:
+   bool Add(const unsigned char *inbuf, unsigned long long len) APT_OVERRIDE APT_NONNULL(2) = 0;
+
+   void Result();
+};
+
+class SHA256Summation : public SHA2SummationBase
+{
+   SHA256_CTX ctx;
+   unsigned char Sum[32];
+
+   public:
+   bool Add(const unsigned char *inbuf, unsigned long long len) APT_OVERRIDE APT_NONNULL(2)
+   {
+      if (Done) 
+         return false;
+      SHA256_Update(&ctx, inbuf, len);
+      return true;
+   };
+   using SummationImplementation::Add;
+
+   SHA256SumValue Result()
+   {
+      if (!Done) {
+         SHA256_Final(Sum, &ctx);
+         Done = true;
+      }
+      SHA256SumValue res;
+      res.Set(Sum);
+      return res;
+   };
+   SHA256Summation()
+   {
+      SHA256_Init(&ctx);
+      Done = false;
+      memset(&Sum, 0, sizeof(Sum));
+   };
+};
+
+class SHA512Summation : public SHA2SummationBase
+{
+   SHA512_CTX ctx;
+   unsigned char Sum[64];
+
+   public:
+   bool Add(const unsigned char *inbuf, unsigned long long len) APT_OVERRIDE APT_NONNULL(2)
+   {
+      if (Done) 
+         return false;
+      SHA512_Update(&ctx, inbuf, len);
+      return true;
+   };
+   using SummationImplementation::Add;
+
+   SHA512SumValue Result()
+   {
+      if (!Done) {
+         SHA512_Final(Sum, &ctx);
+         Done = true;
+      }
+      SHA512SumValue res;
+      res.Set(Sum);
+      return res;
+   };
+   SHA512Summation()
+   {
+      SHA512_Init(&ctx);
+      Done = false;
+      memset(&Sum, 0, sizeof(Sum));
+   };
+};
+
+
+#endif