Hace unos dÃas un cliente nos pidió la información de un fichero de certificado digital en un servidor. QuerÃa saber la fecha de caducidad entre otros detalles.
No se puede leer el fichero editándolo, pero podemos usar openssl, una función de la misma, de manera sencilla para obtener dicha información.
Linux y Mac.
Os ponemos los ejemplos (dependiendo de la codificación):
openssl x509 -in cerfile.cer -noout -text
openssl x509 -inform pem -in cerfile.cer -noout -text
openssl x509 -inform der -in cerfile.cer -noout -textWindows.
En Windows podemos abrir el certificado y nos dará casi toda la información. Si no, podemos usar un comando del sistema por lÃnea de comandos.
certutil -dump <file>Obviamente, en todos estos casos, podemos exportar el contenido a un fichero con los pipe > fichero.txt al final del comando.
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