PKCS7

wikipedia:PKCS7 is used to sign and/or encrypt messages under a PKI. Used also for certificate dissemination (for instance as a response to a PKCS #10 message).

openssl pkcs12 -info -in ios_push_certificate.p12 -nokeys

Convert from .cer to .pem:

openssl pkcs7 -in myCert.cer -print_certs -out certs.pem

See also

• PKCS, PKCS7, PKCS8, PKCS10, PKCS12