csrpubdump

README

csrpubdump

This is a small utility to dump the public key from an X.509 certificate
signature request (CSR) to a standard RFC 5280 PKIX public key format.

There are no command line flags; it accepts a number of PEM- or
DER-enoded CSRs and outputs a public key of the same name as the CSR
with the suffix ".pub" appended.

Example:

	$ csrpubdump cert.csr
	[+] wrote cert.csr.pub.
	$ openssl req -text -in cert.csr -modulus | grep ^Modulus
	Modulus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
	$ openssl rsa -pubin -text -in cert.csr.pub -modulus | grep ^Modulus
	Modulus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