Почему этот пакет (pdfc-gui) обновляет мои ca-сертификаты в Ubuntu 16.04?

Question

Я пытаюсь выяснить, можно ли доверять приложению, которое я установил, на основе следующего вывода. Надеюсь, это правильная платформа, чтобы получить совет по этому вопросу!

Я установил этот пакет (pdfc-gui) отздесьс:

sudo dpkg -i pdfc-gui-21.4.225.deb

и в установке я вижу, что он добавляет/обновляет сертификаты ssl (см. вывод установки ниже).
К сожалению, я не настолько хорошо понимаю Linux, чтобы быть уверенным, стоит ли мне беспокоиться об этом.

Может ли кто-нибудь объяснить мне этот вывод?

Стоит ли мне удалить пакет, и если да, то как убедиться, что все внесенные им изменения действительно будут отменены?

sudo dpkg -i pdfc-gui-21.4.225.deb
Selecting previously unselected package pdfc-gui.
(Reading database ... 734495 files and directories currently installed.)
Preparing to unpack pdfc-gui-21.4.225.deb ...
Unpacking pdfc-gui (21.4.225) ...
Setting up pdfc-gui (21.4.225) ...
Clearing symlinks in /etc/ssl/certs...
done.
Updating certificates in /etc/ssl/certs...
129 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d...

Replacing debian:ACCVRAIZ1.pem
Replacing debian:Actalis_Authentication_Root_CA.pem
Replacing debian:AffirmTrust_Commercial.pem
Replacing debian:AffirmTrust_Networking.pem
Replacing debian:AffirmTrust_Premium.pem
Replacing debian:AffirmTrust_Premium_ECC.pem
Replacing debian:Atos_TrustedRoot_2011.pem
Replacing debian:Autoridad_de_Certificacion_Firmaprofesional_CIF_A62634068.pem
Replacing debian:Baltimore_CyberTrust_Root.pem
Replacing debian:Buypass_Class_2_Root_CA.pem
Replacing debian:Buypass_Class_3_Root_CA.pem
Replacing debian:CA_Disig_Root_R2.pem
Replacing debian:CFCA_EV_ROOT.pem
Replacing debian:COMODO_Certification_Authority.pem
Replacing debian:COMODO_ECC_Certification_Authority.pem
Replacing debian:COMODO_RSA_Certification_Authority.pem
Replacing debian:Certigna.pem
Replacing debian:Certum_Trusted_Network_CA.pem
Replacing debian:Chambers_of_Commerce_Root_-_2008.pem
Replacing debian:Comodo_AAA_Services_root.pem
Replacing debian:Cybertrust_Global_Root.pem
Replacing debian:D-TRUST_Root_Class_3_CA_2_2009.pem
Replacing debian:D-TRUST_Root_Class_3_CA_2_EV_2009.pem
Replacing debian:DST_Root_CA_X3.pem
Replacing debian:DigiCert_Assured_ID_Root_CA.pem
Replacing debian:DigiCert_Assured_ID_Root_G2.pem
Replacing debian:DigiCert_Assured_ID_Root_G3.pem
Replacing debian:DigiCert_Global_Root_CA.pem
Replacing debian:DigiCert_Global_Root_G2.pem
Replacing debian:DigiCert_Global_Root_G3.pem
Replacing debian:DigiCert_High_Assurance_EV_Root_CA.pem
Replacing debian:DigiCert_Trusted_Root_G4.pem
Replacing debian:E-Tugra_Certification_Authority.pem
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Replacing debian:Entrust.net_Premium_2048_Secure_Server_CA.pem
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Replacing debian:Entrust_Root_Certification_Authority_-_G2.pem
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Replacing debian:GlobalSign_ECC_Root_CA_-_R4.pem
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Replacing debian:GlobalSign_Root_CA.pem
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Replacing debian:GlobalSign_Root_CA_-_R3.pem
Replacing debian:Global_Chambersign_Root_-_2008.pem
Replacing debian:Go_Daddy_Class_2_CA.pem
Replacing debian:Go_Daddy_Root_Certificate_Authority_-_G2.pem
Replacing debian:Hellenic_Academic_and_Research_Institutions_RootCA_2011.pem
Replacing debian:Hongkong_Post_Root_CA_1.pem
Replacing debian:IdenTrust_Commercial_Root_CA_1.pem
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Replacing debian:Izenpe.com.pem
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Replacing debian:NetLock_Arany_=Class_Gold=_Főtanúsítvány.pem
Replacing debian:Network_Solutions_Certificate_Authority.pem
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Replacing debian:SecureSign_RootCA11.pem
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Replacing debian:Sonera_Class_2_Root_CA.pem
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Replacing debian:Starfield_Class_2_CA.pem
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Replacing debian:AC_RAIZ_FNMT-RCM.pem
Replacing debian:Amazon_Root_CA_1.pem
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Replacing debian:Certum_Trusted_Network_CA_2.pem
Replacing debian:Hellenic_Academic_and_Research_Institutions_ECC_RootCA_2015.pem
Replacing debian:Hellenic_Academic_and_Research_Institutions_RootCA_2015.pem
Replacing debian:ISRG_Root_X1.pem
Replacing debian:SZAFIR_ROOT_CA2.pem
Replacing debian:TUBITAK_Kamu_SM_SSL_Kok_Sertifikasi_-_Surum_1.pem
Replacing debian:GDCA_TrustAUTH_R5_ROOT.pem
Replacing debian:GlobalSign_Root_CA_-_R6.pem
Replacing debian:OISTE_WISeKey_Global_Root_GC_CA.pem
Replacing debian:SSL.com_EV_Root_Certification_Authority_ECC.pem
Replacing debian:SSL.com_EV_Root_Certification_Authority_RSA_R2.pem
Replacing debian:SSL.com_Root_Certification_Authority_ECC.pem
Replacing debian:SSL.com_Root_Certification_Authority_RSA.pem
Replacing debian:TrustCor_ECA-1.pem
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Replacing debian:Certigna_Root_CA.pem
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Replacing debian:Hongkong_Post_Root_CA_3.pem
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Replacing debian:Microsoft_RSA_Root_Certificate_Authority_2017.pem
Replacing debian:Trustwave_Global_Certification_Authority.pem
Replacing debian:Trustwave_Global_ECC_P256_Certification_Authority.pem
Replacing debian:Trustwave_Global_ECC_P384_Certification_Authority.pem
Replacing debian:UCA_Extended_Validation_Root.pem
Replacing debian:UCA_Global_G2_Root.pem
Replacing debian:NAVER_Global_Root_Certification_Authority.pem
done.
done.
Processing triggers for desktop-file-utils (0.22-1ubuntu5.2) ...
Processing triggers for bamfdaemon (0.5.3~bzr0+16.04.20180209-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for gnome-menus (3.13.3-6ubuntu3.1) ...
Processing triggers for mime-support (3.59ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.15-0ubuntu1.1) ...

Answer 1

Программа вызывает это в своем postinstскрипте:

update-ca-certificates -f 2>/dev/null

Флаг -f:

-f, --fresh Свежие обновления. Удалить символические ссылки в каталоге /etc/ssl/certs.

Итак, вывод соответствует выводу вызова update-ca-certificates. Обратите внимание, что были и другие триггеры, так что обновление сертификатов могло ожидать там, от другой несвязанной установки/обновления, и было обработано только сейчас.

Вы можете проверить содержимое файла debс помощью:

ar -x packages.deb

Скрипты (де)установки затем находятся внутри control.tar.xz(по крайней мере, для версии 2.0 формата двоичных пакетов Debian).

При этом нет никакого способа доверять приложению с закрытым исходным кодом. Если бы оно делало что-то теневое, вы бы, вероятно, не увидели этого в выводе (изменение сертификатов CA было бы определенно теневым, но, похоже, это не так).