Rivendellaudio/lib/rdhash.cpp
Fred Gleason 5dc6fa92a9 2017-03-29 Fred Gleason <fredg@paravelsystems.com>
* Added a 'CUTS.SHA1_HASH' field to the database.
	* Incremented the database version to 261.
	* Added a 'Sha1' column to the Cut List in 'rdlibrary/audio_cart.cpp'.
	* Added 'RDCut::sha1Hash()' and 'RDCut::setSha1Hash()' methods in
	'lib/rdcut.cpp' and 'lib/rdcut.h'.
	* Added a '--rehash=' directive to rddbcheck(8).
	* Added a 'Rehash' Web API call.
	* Added an 'RDRehash' class in 'lib/rdrehash.cpp' and 'lib/rdrehash.h'.
2017-03-29 11:09:15 -04:00

60 lines
1.4 KiB
C++

// rdhash.cpp
//
// Functions for generating hashes.
//
// (C) Copyright 2017 Fred Gleason <fredg@paravelsystems.com>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <openssl/sha.h>
#include "rdhash.h"
QString RDSha1Hash(const QString &filename,bool throttle)
{
QString ret;
SHA_CTX ctx;
int fd=-1;
int n;
char data[1024];
unsigned char md[SHA_DIGEST_LENGTH];
if((fd=open(filename,O_RDONLY))<0) {
return ret;
}
SHA1_Init(&ctx);
while((n=read(fd,data,1024))>0) {
SHA1_Update(&ctx,data,n);
if(throttle) {
usleep(1);
}
}
close(fd);
SHA1_Final(md,&ctx);
ret="";
for(int i=0;i<SHA_DIGEST_LENGTH;i++) {
ret+=QString().sprintf("%02x",0xff&md[i]);
}
return ret;
}