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CentOS 7.0 - man page for strongimcv_pki---pub (centos section 1)

PKI --PUB(1)							    strongSwan							      PKI --PUB(1)

pki --pub - Extract a public key from a private key or certificate
pki --pub [--in file|--keyid hex] [--type type] [--outform encoding] [--debug level] pki --pub --options file pki --pub -h | --help
This sub-command of pki(1) extracts public keys from a private keys and certificates.
-h, --help Print usage information with a summary of the available options. -v, --debug level Set debug level, default: 1. -+, --options file Read command line options from file. -i, --in file Input file. If not given the input is read from STDIN. -t, --type type Type of input. One of rsa (RSA private key), ecdsa (ECDSA private key), pub (public key), pkcs10 (PKCS#10 certificate request), or x509 (X.509 certificate), defaults to rsa. -f, --outform encoding Encoding of the extracted public key. One of der (ASN.1 DER), pem (Base64 PEM), dnskey (RFC 3110 DNS key), or sshkey (RFC 4253 SSH key), defaults to der.
Extract the public key from an RSA private key: pki --pub --in key.der > pub.der Extract the public key from an X.509 certificate: pki --pub --in cert.der --type x509 > pub.der
pki(1) 5.1.1 2013-07-31 PKI --PUB(1)