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/* $Id: multihash.c 168 2009-01-10 14:15:08Z jessekornblum $ */
#include "main.h"
void multihash_initialize(state *s)
{
hashname_t i;
for (i = 0 ; i < NUM_ALGORITHMS ; ++i)
{
if (s->hashes[i]->inuse)
{
memset(s->current_file->hash[i],0,s->hashes[i]->byte_length);
s->hashes[i]->f_init(s->hashes[i]->hash_context);
}
}
}
void multihash_update(state *s, unsigned char *buf, uint64_t len)
{
hashname_t i;
// We have to copy the data being hashed from the buffer we were
// passed into another structure because the SHA-1 update
// routine modifies it.
for (i = 0 ; i < NUM_ALGORITHMS ; ++i)
{
if (s->hashes[i]->inuse)
{
memcpy(s->buffer,buf,len);
s->hashes[i]->f_update(s->hashes[i]->hash_context,s->buffer,len);
}
}
}
void multihash_finalize(state *s)
{
hashname_t i;
uint16_t j, len;
static char hex[] = "0123456789abcdef";
char * result;
for (i = 0 ; i < NUM_ALGORITHMS ; ++i)
{
if (s->hashes[i]->inuse)
{
s->hashes[i]->f_finalize(s->hashes[i]->hash_context,
s->hashes[i]->hash_sum);
len = s->hashes[i]->byte_length / 2;
/* Shorthand to make the code easier to read */
result = s->current_file->hash[i];
for (j = 0; j < len ; ++j)
{
result[2 * j] = hex[(s->hashes[i]->hash_sum[j] >> 4) & 0xf];
result[2 * j + 1] = hex[s->hashes[i]->hash_sum[j] & 0xf];
}
result[s->hashes[i]->byte_length] = 0;
}
}
s->current_file->file_name = s->full_name;
s->current_file->file_size = s->total_bytes;
}
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