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Code Signing with OpenSSL

Vérification de certificat avec OpenSSL

 openssl s_client -connect isc.sans.org:443

on line tools:

Certificate Chaining

On this page you'll find how to create only one file which contains your certificate and others chain certificates (Concatenate them in one), like, I think, you could have only one configuration directive to use : the CertificateFile, and to not need the CertificateChainFile anymore :


Key generation


  # Génération des clés
  openssl genrsa -out maCle.pem 1024
  # Exportation de la partie publique
  openssl rsa -in maCle.pem -pubout -out maClePublique.pem

CSR generation

La CSR (Certificate Signing Request) est un fichier contenant les informations de votre demande de certificat, y compris votre clé publique.

  openssl req -nodes -newkey rsa:2048 -keyout monserveur.key -out serveur.csr


Afficher les données d'un CSR:

openssl req -in theCertificateSigningResquest.csr -noout -text

Afficher les données d'un certificat encodé PEM:

openssl x509 -in theCertificate.crt -noout -text


CVE-2014-0160, CVE-2014-0160 on nist.gov

The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remote attackers to obtain sensitive information from process memory via crafted packets that trigger a buffer over-read, as demonstrated by reading private keys, related to d1_both.c and t1_lib.c, aka the Heartbleed bug.

L'analyse de l'APRIL : “HeartBleed, tous à poil sur Internet

informatique/openssl.txt · Dernière modification: 12/09/2014 17:32 par cyrille