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This commit is contained in:
Hans Joachim Gurt 2007-08-17 01:11:23 +00:00
parent 6be80f01b6
commit 5559bba4ce
1 changed files with 9 additions and 5 deletions
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14
src/sha1.cpp
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@ -12,13 +12,17 @@
See the COPYING file for more details.
*/
//! @file sha1.cpp
//! Secure Hash Algorithm 1 (SHA-1).
//! Used to checksum the game-config / cache.
/* This is supposed to be an implementation of the
Secure Hash Algorithm 1 (SHA-1)
Check RFC 3174 for details about the algorithm.
Currently this implementation might produce different result on endian and
bigendian machines, but for our current usage, we don't care :)
Currently this implementation might produce different results on little-
and big-endian machines, but for our current usage, we don't care :)
*/
#include "sha1.hpp"
@ -31,7 +35,7 @@
#define sha_parity(x,y,z) ( (x) ^ (y) ^ (z) )
#define sha_maj(x,y,z) ( ((x) & (y)) | ((x) & (z)) | ((y) & (z)) )
// display our hash
//! Display the hash
std::string sha1_hash::display() {
std::stringstream s;
s << std::hex << std::setfill('0') << std::setw(8) << H0;
@ -42,7 +46,7 @@ std::string sha1_hash::display() {
return s.str();
}
// make a hash from a string
//! Make a hash from a string
sha1_hash::sha1_hash(const std::string& str)
: H0(0x67452301), H1(0xefcdab89), H2(0x98badcfe), H3(0x10325476), H4(0xc3d2e1f0)
{
@ -90,7 +94,7 @@ sha1_hash::sha1_hash(const std::string& str)
}
}
// process the next 512 bits block
//! Process the next 512 bits block
void sha1_hash::next(Uint8 block[64]) {
Uint32 W[80];
Uint32 A, B, C, D, E, T;