mirror/RetroArch
1
0
Fork 0
mirror of https://github.com/libretro/RetroArch synced 2025-02-19 12:41:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

(retrolaunch) SHA1 cleanups

Browse Source
This commit is contained in:
twinaphex 2014-08-13 03:32:35 +02:00
parent 0522b9be78
commit 343097fbd5
2 changed files with 11 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
tools/retrolaunch/sha1.c
View File

@ -40,9 +40,7 @@
#include "sha1.h" #include "sha1.h"
/* /* Define the circular shift macro */
* Define the circular shift macro
*/
#define SHA1CircularShift(bits,word) ((((word) << (bits)) & 0xFFFFFFFF) | ((word) >> (32-(bits)))) #define SHA1CircularShift(bits,word) ((((word) << (bits)) & 0xFFFFFFFF) | ((word) >> (32-(bits))))
void SHA1Reset(SHA1Context *context) void SHA1Reset(SHA1Context *context)
@ -75,9 +73,7 @@ void SHA1ProcessMessageBlock(SHA1Context *context)
unsigned W[80]; /* Word sequence */ unsigned W[80]; /* Word sequence */
unsigned A, B, C, D, E; /* Word buffers */ unsigned A, B, C, D, E; /* Word buffers */
/* /* Initialize the first 16 words in the array W */
* Initialize the first 16 words in the array W
*/
for(t = 0; t < 16; t++) for(t = 0; t < 16; t++)
{ {
W[t] = ((unsigned) context->Message_Block[t * 4]) << 24; W[t] = ((unsigned) context->Message_Block[t * 4]) << 24;
@ -87,9 +83,7 @@ void SHA1ProcessMessageBlock(SHA1Context *context)
} }
for(t = 16; t < 80; t++) for(t = 16; t < 80; t++)
{
W[t] = SHA1CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]); W[t] = SHA1CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
}
A = context->Message_Digest[0]; A = context->Message_Digest[0];
B = context->Message_Digest[1]; B = context->Message_Digest[1];
@ -183,9 +177,7 @@ void SHA1PadMessage(SHA1Context *context)
context->Message_Block[context->Message_Block_Index++] = 0; context->Message_Block[context->Message_Block_Index++] = 0;
} }
/* /* Store the message length as the last 8 octets */
* Store the message length as the last 8 octets
*/
context->Message_Block[56] = (context->Length_High >> 24) & 0xFF; context->Message_Block[56] = (context->Length_High >> 24) & 0xFF;
context->Message_Block[57] = (context->Length_High >> 16) & 0xFF; context->Message_Block[57] = (context->Length_High >> 16) & 0xFF;
context->Message_Block[58] = (context->Length_High >> 8) & 0xFF; context->Message_Block[58] = (context->Length_High >> 8) & 0xFF;
@ -248,5 +240,3 @@ void SHA1Input( SHA1Context *context,
message_array++; message_array++;
} }
} }

25
tools/retrolaunch/sha1.h
View File

@ -24,31 +24,22 @@
#ifndef _SHA1_H_ #ifndef _SHA1_H_
#define _SHA1_H_ #define _SHA1_H_
/*
* This structure will hold context information for the hashing
* operation
*/
typedef struct SHA1Context typedef struct SHA1Context
{ {
unsigned Message_Digest[5]; /* Message Digest (output) */ unsigned Message_Digest[5]; /* Message Digest (output) */
unsigned Length_Low; /* Message length in bits */ unsigned Length_Low; /* Message length in bits */
unsigned Length_High; /* Message length in bits */ unsigned Length_High; /* Message length in bits */
unsigned char Message_Block[64]; /* 512-bit message blocks */ unsigned char Message_Block[64]; /* 512-bit message blocks */
int Message_Block_Index; /* Index into message block array */ int Message_Block_Index; /* Index into message block array */
int Computed; /* Is the digest computed? */ int Computed; /* Is the digest computed? */
int Corrupted; /* Is the message digest corruped? */ int Corrupted; /* Is the message digest corruped? */
} SHA1Context; } SHA1Context;
/*
* Function Prototypes
*/
void SHA1Reset(SHA1Context *); void SHA1Reset(SHA1Context *);
int SHA1Result(SHA1Context *); int SHA1Result(SHA1Context *);
void SHA1Input( SHA1Context *, void SHA1Input( SHA1Context *, const unsigned char *, unsigned);
const unsigned char *,
unsigned);
#endif #endif