Take a PEM format file as input and split out certs and keys into separate files.

pem-split

#!/usr/bin/awk -f
#
# Take a PEM format file as input and split out certs and keys into separate files
#

BEGIN                          { n=0; cert=0; key=0; if ( ARGC < 2 ) { print "Usage: pem-split FILENAME"; exit 1 } }
/-----BEGIN RSA PRIVATE KEY-----/  { key=1; cert=0 }
/-----BEGIN CERTIFICATE-----/  { cert=1; key=0 }
split_after == 1               { n++; split_after=0 }
/-----END CERTIFICATE-----/    { split_after=1 }
/-----END RSA PRIVATE KEY-----/    { split_after=1 }
key == 1                       { print > "app.key" }
cert == 1                      { print >> "app.crt" }