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fixed bug in storing file that could cause entertaining file hash

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problems.
This commit is contained in:
gardners 2012-05-27 14:44:53 +02:00
parent 9d811876c7
commit 4da9824ab0
1 changed files with 3 additions and 2 deletions
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5
rhizome_database.c
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@ -857,11 +857,11 @@ int rhizome_store_file(rhizome_manifest *m,const unsigned char *key)
{
int n=RHIZOME_CRYPT_PAGE_SIZE;
if (i+n>m->fileLength) n=m->fileLength-i;
SHA512_Update(&context, &addr[i], count);
SHA512_Update(&context, &addr[i], n);
if (key) {
/* calculate block nonce */
int j; for(j=0;j<8;j++) nonce[i]=(i>>(j*8))&0xff;
crypto_stream_xsalsa20_xor(&addr[i],&buffer[0],count,
crypto_stream_xsalsa20_xor(&addr[i],&buffer[0],n,
nonce,key);
if (sqlite3_blob_write(blob,&buffer[0],n,i) !=SQLITE_OK) dud++;
}
@ -877,6 +877,7 @@ int rhizome_store_file(rhizome_manifest *m,const unsigned char *key)
if (strcasecmp(hash_out,hash))
{
WHYF("Computed hash = %s",hash_out);
return WHY("File hash does not match -- has file been modified while being stored?");
}