int SHA1Result(SHA1Context *context) {
if (context->Corrupted)
return 0;
if (!context->Computed) {
SHA1PadMessage(context);
context->Computed = 1;
}
return 1;
}
/*
* SHA1Finalize
*
* Description:
* This helper function finishes off the digest calculations.
*
* Parameters:
* context: [in/out]
* The SHA context to update.
* Pad_Byte: [in]
* The last byte to add to the message block before the 0-padding
* and length. This will contain the last bits of the message
* followed by another single bit. If the message was an
* exact multiple of 8-bits long, Pad_Byte will be 0x80.
*
* Returns:
* sha Error Code.
*
*/
static void SHA1Finalize(SHA1Context *context, uint8_t Pad_Byte)
{
int i;
SHA1PadMessage(context, Pad_Byte);
/* message may be sensitive, clear it out */
for (i = 0; i < SHA1_Message_Block_Size; ++i)
context->Message_Block[i] = 0;
context->Length_High = 0; /* and clear length */
context->Length_Low = 0;
context->Computed = 1;
}
/*
* SHA1Result
*
* Description:
* This function will return the 160-bit message digest into the
* Message_Digest array within the sha1_ctx provided
*
* Parameters:
* context: [in/out]
* The context to use to calculate the SHA-1 hash.
*
* Returns:
* 1 if successful, 0 if it failed.
*
* Comments:
*
*/
int sha1_end(sha1_ctx *ctx) {
if (ctx->Corrupted) {
return 0;
}
if (!ctx->Computed) {
SHA1PadMessage(ctx);
ctx->Computed = 1;
}
return 1;
}
/*
* SHA1Result
*
* Description:
* This function will return the 160-bit message digest into the
* Message_Digest array provided by the caller.
* NOTE: The first octet of hash is stored in the 0th element,
* the last octet of hash in the 19th element.
*
* Parameters:
* context: [in/out]
* The context to use to calculate the SHA-1 hash.
* Message_Digest: [out]
* Where the digest is returned.
*
* Returns:
* sha Error Code.
*
*/
void SHA1Result(SHA1Context *context, PCHAR Message_Digest)
{
UCHAR i;
PCHAR p;
SHA1PadMessage(context);
/*
for(i=0; i<64; ++i)
{
context->Message_Block[i] = 0;
}
*/
/* message may be sensitive, clear it out */
memset(context->Message_Block, 0, 64);
context->Length_Low = 0; /* and clear length */
p = Message_Digest;
for(i = 0; i < (SHA1HashSize/4); i ++)
{
// Message_Digest[i] = (UCHAR)(context->Intermediate_Hash[i>>2] >> 8 * ( 3 - ( i & 0x03 ) ));
ULONG2PCHAR(context->Intermediate_Hash[i], p);
p += 4;
}
}
