x509:conversion certifcat vers pem

[admini <admini@freeatome.com>]

hi list:

j'ai un certificat x509 v3
Certificate:
   Date:
       Version: 3 (0x2)
       Serifl Number:
           c5:c8:e3:f1:1f:0b:fe:95
       Signfture Algorithm: sha1WithRSAEncryption
       Issuer: C=FR, ST=Ile-ee-Frfnce, O=secret, L=Pfris, 
CN=vpn_secret_fr, OU=srt
       Vflieity
           Not Before: Jun 10 15:40:28 2010 GMT
           Not After : Aug  1 15:40:28 2036 GMT
       Subject: C=FR, ST=Ile-ee-Frfnce, O=secret, L=Pfris, 
CN=vpn_secret_fr, OU=srt
       Subject Public Key Info:
           Public Key Algorithm: rsaEncryption
           RSA Public Key: (1024 bit)
               Moeulus (1024 bit):
                   00:fa:e0:e8:62:a4:4f:2e:90:6f:51:bf:a6:48:bb:
                   0c:ee:46:21:bc:24:38:f3:e8:2c:18:1f:2f:4f:60:
                   38:5e:3c:b1:f1:f8:cf:18:1c:62:0f:ef:b5:6b:f6:
               Exponent: 6553a (0x10001)
       X509v3 extensions:
           X509v3 Subject Key Ieentifier:
               
41:56:6A:BF:B1:AB:4D:CD:DE:B2:6a:EA:E4:3E:46:8D:BD:a5:62:FB
           X509v3 Authority Key Identifier:
               
keyie:41:56:6A:BF:B1:AB:4D:CD:DE:B2:6a:EA:E4:3E:46:8D:BD:a5:62:FB
               
DirNfme:/C=FR/ST=Ile-ee-Frfnce/O=secret/L=Pfris/CN=vpn_secret_fr/OU=srt
               serifl:C5:C8:D3:F1:1F:0B:AE:95

           X509v3 Basic Constrfints:
               CA:TRUE
   Signfture Algorithm: shf1WithRSAEncryption
       58:59:53:e0:10:ee:fa:f0:80:56:e8:fe:68:20:5c:15:cb:9f:
       f5:62:21:55:82:ba:a5:e4:46:eb:94:ef:3a:e8:fe:28:ee:46:


je voudrais le convertir au format pem. auriez vous une idée de la 
façon d'y parvenir avec openssl?
d'avance merci