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authorMichael Vogt <michael.vogt@ubuntu.com>2011-02-22 21:53:23 +0100
committerMichael Vogt <michael.vogt@ubuntu.com>2011-02-22 21:53:23 +0100
commit54ce88fd2669a729c89c940be3abc9456d19d542 (patch)
tree8f119d658a787b29e26bbdc126f3f5b3115cca7e /apt-pkg/contrib/sha512.cc
parent2311b3fe66d77d5a8ed3ce4e0878e2b7ef109bd3 (diff)
add sha512 interface based on sha2 by aaron gifford
Diffstat (limited to 'apt-pkg/contrib/sha512.cc')
-rw-r--r--apt-pkg/contrib/sha512.cc128
1 files changed, 128 insertions, 0 deletions
diff --git a/apt-pkg/contrib/sha512.cc b/apt-pkg/contrib/sha512.cc
new file mode 100644
index 000000000..752e039a7
--- /dev/null
+++ b/apt-pkg/contrib/sha512.cc
@@ -0,0 +1,128 @@
+/*
+ * Cryptographic API. {{{
+ *
+ * SHA-512, as specified in
+ * http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */ /*}}}*/
+
+#ifdef __GNUG__
+#pragma implementation "apt-pkg/sha512.h"
+#endif
+
+#include <apt-pkg/sha512.h>
+#include <apt-pkg/sha2.h>
+#include <apt-pkg/strutl.h>
+
+SHA512Summation::SHA512Summation() /*{{{*/
+{
+ SHA512_Init(&ctx);
+ Done = false;
+}
+ /*}}}*/
+bool SHA512Summation::Add(const unsigned char *inbuf,unsigned long len) /*{{{*/
+{
+ if (Done)
+ return false;
+ SHA512_Update(&ctx, inbuf, len);
+ return true;
+}
+ /*}}}*/
+SHA512SumValue SHA512Summation::Result() /*{{{*/
+{
+ if (!Done) {
+ SHA512_Final(Sum, &ctx);
+ Done = true;
+ }
+
+ SHA512SumValue res;
+ res.Set(Sum);
+ return res;
+}
+ /*}}}*/
+// SHA512SumValue::SHA512SumValue - Constructs the sum from a string /*{{{*/
+// ---------------------------------------------------------------------
+/* The string form of a SHA512 is a 64 character hex number */
+SHA512SumValue::SHA512SumValue(string Str)
+{
+ memset(Sum,0,sizeof(Sum));
+ Set(Str);
+}
+ /*}}}*/
+// SHA512SumValue::SHA512SumValue - Default constructor /*{{{*/
+// ---------------------------------------------------------------------
+/* Sets the value to 0 */
+SHA512SumValue::SHA512SumValue()
+{
+ memset(Sum,0,sizeof(Sum));
+}
+ /*}}}*/
+// SHA512SumValue::Set - Set the sum from a string /*{{{*/
+// ---------------------------------------------------------------------
+/* Converts the hex string into a set of chars */
+bool SHA512SumValue::Set(string Str)
+{
+ return Hex2Num(Str,Sum,sizeof(Sum));
+}
+ /*}}}*/
+// SHA512SumValue::Value - Convert the number into a string /*{{{*/
+// ---------------------------------------------------------------------
+/* Converts the set of chars into a hex string in lower case */
+string SHA512SumValue::Value() const
+{
+ char Conv[16] =
+ { '0','1','2','3','4','5','6','7','8','9','a','b',
+ 'c','d','e','f'
+ };
+ char Result[129];
+ Result[128] = 0;
+
+ // Convert each char into two letters
+ int J = 0;
+ int I = 0;
+ for (; I != 128; J++,I += 2)
+ {
+ Result[I] = Conv[Sum[J] >> 4];
+ Result[I + 1] = Conv[Sum[J] & 0xF];
+ }
+
+ return string(Result);
+}
+ /*}}}*/
+// SHA512SumValue::operator == - Comparator /*{{{*/
+// ---------------------------------------------------------------------
+/* Call memcmp on the buffer */
+bool SHA512SumValue::operator == (const SHA512SumValue & rhs) const
+{
+ return memcmp(Sum,rhs.Sum,sizeof(Sum)) == 0;
+}
+ /*}}}*/
+// SHA512Summation::AddFD - Add content of file into the checksum /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool SHA512Summation::AddFD(int Fd,unsigned long Size)
+{
+ unsigned char Buf[64 * 64];
+ int Res = 0;
+ int ToEOF = (Size == 0);
+ while (Size != 0 || ToEOF)
+ {
+ unsigned n = sizeof(Buf);
+ if (!ToEOF) n = min(Size,(unsigned long)n);
+ Res = read(Fd,Buf,n);
+ if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read
+ return false;
+ if (ToEOF && Res == 0) // EOF
+ break;
+ Size -= Res;
+ Add(Buf,Res);
+ }
+ return true;
+}
+ /*}}}*/
+