2 @cindex integrity check
3 @cindex authenticity check
8 @section Tarballs integrity check
10 You @strong{have to} check downloaded archives integrity and verify
11 their signature to be sure that you have got trusted, untampered
12 software. For integrity and authentication of downloaded binaries
13 @url{https://www.gnupg.org/, GNU Privacy Guard} is used. You must
14 download signature (@file{.sig}) provided with the tarball.
16 For the very first time you need to import signing public key. It is
17 provided below, but it is better to check alternative resources with it.
20 pub rsa2048/0x2B25868E75A1A953 2017-01-10
21 92C2 F0AE FE73 208E 46BF F3DE 2B25 868E 75A1 A953
22 uid NNCP releases <releases at nncpgo dot org>
29 $ gpg --auto-key-locate dane --locate-keys releases at nncpgo dot org
30 $ gpg --auto-key-locate wkd --locate-keys releases at nncpgo dot org
34 @verbatiminclude .well-known/openpgpkey/nncpgo.org/hu/i4cdqgcarfjdjnba6y4jnf498asg8c6p.asc
38 Then you could verify tarballs signature:
41 $ gpg --verify nncp-@value{VERSION}.tar.xz.sig nncp-@value{VERSION}.tar.xz