Today I discover that there are 2 public key formats with PEM format headers, eg
X.509 SubjectPublicKeyInfo** (PEM header: BEGIN PUBLIC KEY)
which correspond to the short header form;
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzsQ7MkLsc1lJ8S2WtItN
cfj7pbdB6PVcRHEEjbie97Rqthkr6h2WE5rVj0BZNwFjs4NIUYws2KeQjexZ8NEY
qpcP9iPMjdNgLpU8uL03QMti+y+y0IU4493KxKxjprjtu6no0/O5TwNs+/r+7hmF
/8d+2mhyLJQbtuvQQ6mvg6roCMuqzRS91SObzT1ojCjY+AbUrmVZ5jmklHCv7uah
EoTsB3S7wHCBRmelh2j5fWrRBay4h0IB/NSrt1dO/UEVmDSWGjnG+RsDMhYGZXJ1
hJawhqrbuVRZvrMyzqQ0j1xy5buS6jqSHA3wdOixdI8dDpvBnUDGqEIU6gl2Am7h
pwIDAQAB
-----END PUBLIC KEY-----
and
PKCS#1 RSAPublicKey* (PEM header: BEGIN RSA PUBLIC KEY)
which correspond to the longer form;
-----BEGIN RSA PUBLIC KEY-----
MIIBCgKCAQEA1+skaD+II3MYF/0iGDcFX/E6b0XzSC8I2RapRaCL84EqY8HxWGKn
+7p34ZJwZx9avX0cCUqvTmS6LtuoSGrdLlahrz1qEnkdYqlo9HXXQiKtA9iwaiId
LxPtCnJnGMOMtolwKAJpsr+l68D41mWvvibrwPbeTJsFi0zvrN0rL1YbVYvw3X85
fQm+wgo3s8I5sOWwlkADvfD37KxteEPitfb2cvGfYo+VIhBqqXQUhQSC3jBAUc5o
+P8U3eu84ln2YqiIg9P/iM99HoKFECJ2+mxWM8oz0rS8oqthVOck+KZ7mBiYjEzW
3ytTJIUpX9Sl88oDqkz7Azku/GVEiJNWSQIDAQAB
-----END RSA PUBLIC KEY-----
I would like to verify some public keys in the latter format, however I cannot see that openssl command line tool can obviously do that. -pubout exports the first format, and the pubin format rejects the 2nd headers;
#openssl rsa -pubin -in rsa.pub -modulus -noout
unable to load Public Key
140154809448256:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:696:Expecting: PUBLIC KEY
Any suggestions on what the correct commands are for openssl, or whether there is some tool that would does this from the command line?