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Thread: So I thought I understood MD5, but...

  1. #1
    Orca Whisperer
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    So I thought I understood MD5, but...

    ... it appears I don't. Was verifying integrity on a system binary for a machine. I compared the md5sum of that binary to several other machines I have, running the same version/arch/etc.

    Some of the md5sums were the same, but a lot of them were different from each other even. rpm -V checks out, as does yum-verify. Is there something else at play here (Such as atime, ctime, mtime, etc?)
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  2. #2
    SK Member Feb 2017 W4GPL's Avatar
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    prelink will change the binary's md5sum.. yet properly verify via RPM.

  3. #3
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    Well, that makes a whole lot more sense now, and rpm -V is pre-link aware... Thanks!
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  4. #4
    SK Member Feb 2017 W4GPL's Avatar
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    This was a big problem with Tripwire when they first implemented prelinking. I think Tripwire has since added a plugin to deal with it though.

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