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(retrolaunch) SHA1 cleanups
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@ -40,9 +40,7 @@
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#include "sha1.h"
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/*
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* Define the circular shift macro
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*/
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/* Define the circular shift macro */
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#define SHA1CircularShift(bits,word) ((((word) << (bits)) & 0xFFFFFFFF) | ((word) >> (32-(bits))))
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void SHA1Reset(SHA1Context *context)
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@ -75,9 +73,7 @@ void SHA1ProcessMessageBlock(SHA1Context *context)
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unsigned W[80]; /* Word sequence */
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unsigned A, B, C, D, E; /* Word buffers */
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/*
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* Initialize the first 16 words in the array W
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*/
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/* Initialize the first 16 words in the array W */
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for(t = 0; t < 16; t++)
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{
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W[t] = ((unsigned) context->Message_Block[t * 4]) << 24;
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@ -87,9 +83,7 @@ void SHA1ProcessMessageBlock(SHA1Context *context)
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}
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for(t = 16; t < 80; t++)
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{
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W[t] = SHA1CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
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}
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A = context->Message_Digest[0];
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B = context->Message_Digest[1];
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@ -183,9 +177,7 @@ void SHA1PadMessage(SHA1Context *context)
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context->Message_Block[context->Message_Block_Index++] = 0;
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}
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/*
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* Store the message length as the last 8 octets
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*/
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/* Store the message length as the last 8 octets */
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context->Message_Block[56] = (context->Length_High >> 24) & 0xFF;
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context->Message_Block[57] = (context->Length_High >> 16) & 0xFF;
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context->Message_Block[58] = (context->Length_High >> 8) & 0xFF;
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@ -248,5 +240,3 @@ void SHA1Input( SHA1Context *context,
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message_array++;
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}
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}
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@ -24,31 +24,22 @@
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#ifndef _SHA1_H_
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#define _SHA1_H_
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/*
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* This structure will hold context information for the hashing
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* operation
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*/
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typedef struct SHA1Context
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{
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unsigned Message_Digest[5]; /* Message Digest (output) */
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unsigned Message_Digest[5]; /* Message Digest (output) */
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unsigned Length_Low; /* Message length in bits */
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unsigned Length_High; /* Message length in bits */
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unsigned Length_Low; /* Message length in bits */
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unsigned Length_High; /* Message length in bits */
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unsigned char Message_Block[64]; /* 512-bit message blocks */
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int Message_Block_Index; /* Index into message block array */
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unsigned char Message_Block[64]; /* 512-bit message blocks */
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int Message_Block_Index; /* Index into message block array */
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int Computed; /* Is the digest computed? */
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int Corrupted; /* Is the message digest corruped? */
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int Computed; /* Is the digest computed? */
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int Corrupted; /* Is the message digest corruped? */
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} SHA1Context;
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/*
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* Function Prototypes
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*/
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void SHA1Reset(SHA1Context *);
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int SHA1Result(SHA1Context *);
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void SHA1Input( SHA1Context *,
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const unsigned char *,
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unsigned);
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void SHA1Input( SHA1Context *, const unsigned char *, unsigned);
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#endif
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