Re: [fpc-pascal] Linux elf with signed checksum

2012-05-28 Thread ik
On Mon, May 28, 2012 at 3:34 PM, Jonas Maebe wrote: > > On 28 May 2012, at 14:09, ik wrote: > > > The second part is more interesting for this subject: It signs a checksum > > of the ELF file, so any change to it will break the checksum. > > It helps you to discover for example root-kits. > > > >

Re: [fpc-pascal] Linux elf with signed checksum

2012-05-28 Thread Jonas Maebe
On 28 May 2012, at 14:09, ik wrote: > The second part is more interesting for this subject: It signs a checksum > of the ELF file, so any change to it will break the checksum. > It helps you to discover for example root-kits. > > Is it a compiler based signature, or something from the build itse

[fpc-pascal] Linux elf with signed checksum

2012-05-28 Thread ik
Hello, I see that most of the ELF on my system, contain a signature like so: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, BuildID[sha1]=0x39645af26ea483eaae81df45bf34701580506115, stripped There are two very interesting signatu