From 31693a8ff0fe593879ed30a4dde8f9be5b0859bf Mon Sep 17 00:00:00 2001
From: Michael Vogt <michael.vogt@ubuntu.com>
Date: Mon, 28 Feb 2011 09:36:17 +0100
Subject: apt-pkg/contrib/sha2.{cc,h}: move duplicated AddFD to baseclass

---
 apt-pkg/contrib/sha2.h | 87 +++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 65 insertions(+), 22 deletions(-)

(limited to 'apt-pkg/contrib/sha2.h')

diff --git a/apt-pkg/contrib/sha2.h b/apt-pkg/contrib/sha2.h
index 2c3fcae12..bd5472527 100644
--- a/apt-pkg/contrib/sha2.h
+++ b/apt-pkg/contrib/sha2.h
@@ -31,40 +31,83 @@ class SHA256Summation;
 typedef HashSumValue<512> SHA512SumValue;
 typedef HashSumValue<256> SHA256SumValue;
 
-class SHA256Summation
+class SHA2SummationBase
+{
+ protected:
+   bool Done;
+ public:
+   virtual bool Add(const unsigned char *inbuf,unsigned long inlen) = 0;
+   virtual bool AddFD(int Fd,unsigned long Size);
+
+   inline bool Add(const char *Data) 
+   {
+      return Add((unsigned char *)Data,strlen(Data));
+   };
+   inline bool Add(const unsigned char *Beg,const unsigned char *End) 
+   {
+      return Add(Beg,End-Beg);
+   };
+   void Result();
+};
+
+class SHA256Summation : public SHA2SummationBase
 {
    SHA256_CTX ctx;
    unsigned char Sum[32];
-   bool Done;
 
    public:
-
-   bool Add(const unsigned char *inbuf,unsigned long inlen);
-   inline bool Add(const char *Data) {return Add((unsigned char *)Data,strlen(Data));};
-   bool AddFD(int Fd,unsigned long Size);
-   inline bool Add(const unsigned char *Beg,const unsigned char *End) 
-                  {return Add(Beg,End-Beg);};
-   SHA256SumValue Result();
-   
-   SHA256Summation();
+   virtual bool Add(const unsigned char *inbuf, unsigned long len)
+   {
+      if (Done) 
+         return false;
+      SHA256_Update(&ctx, inbuf, len);
+      return true;
+   };
+   SHA256SumValue Result()
+   {
+      if (!Done) {
+         SHA256_Final(Sum, &ctx);
+         Done = true;
+      }
+      SHA256SumValue res;
+      res.Set(Sum);
+      return res;
+   };
+   SHA256Summation() 
+   {
+      SHA256_Init(&ctx);
+      Done = false;
+   };
 };
 
-class SHA512Summation
+class SHA512Summation : public SHA2SummationBase
 {
    SHA512_CTX ctx;
    unsigned char Sum[64];
-   bool Done;
 
    public:
-
-   bool Add(const unsigned char *inbuf,unsigned long inlen);
-   inline bool Add(const char *Data) {return Add((unsigned char *)Data,strlen(Data));};
-   bool AddFD(int Fd,unsigned long Size);
-   inline bool Add(const unsigned char *Beg,const unsigned char *End) 
-                  {return Add(Beg,End-Beg);};
-   SHA512SumValue Result();
-   
-   SHA512Summation();
+   virtual bool Add(const unsigned char *inbuf, unsigned long len)
+   {
+      if (Done) 
+         return false;
+      SHA512_Update(&ctx, inbuf, len);
+      return true;
+   };
+   SHA512SumValue Result()
+   {
+      if (!Done) {
+         SHA512_Final(Sum, &ctx);
+         Done = true;
+      }
+      SHA512SumValue res;
+      res.Set(Sum);
+      return res;
+   };
+   SHA512Summation()
+   {
+      SHA512_Init(&ctx);
+      Done = false;
+   };
 };
 
 
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