Encrypt file using certificate resulting in 'Expecting PUBLIC KEY'

Asked Nov 02 '18 at 09:51

Active Nov 02 '18 at 09:52

Viewed 93 times

I've been given a certificate and told to encrypt a file using openssl.

This certificate is a .cer file, so I need to create a .pem file first. I have tried doing this using macOS's Keychain Access, and also using openssl in the terminal. They result in the same file, which starts with -----BEGIN CERTIFICATE-----.

I run the following command

openssl pkeyutl -encrypt -inkey certificate.pem -pubin -in key.xml -pkeyopt rsa_padding_mode:oaep -pkeyopt rsa_oaep_md:sha256 -pkeyopt rsa_mgf1_md:sha256 -out key.xml.enc

I get the error

unable to load Public Key Error initializing context 4799456876:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:697:Expecting: PUBLIC KEY

Am I using the wrong tools or the wrong approach? Any help is appreciated :)

edited Nov 02 '18 at 09:52

Dave

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asked Nov 02 '18 at 09:51

thijsdemaa

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Does this help https://stackoverflow.com/questions/17143606/how-to-save-public-key-from-a-certificate-in-pem-format – RiggsFolly Nov 02 '18 at 10:07
@RiggsFolly Why yes it does, thank you so much! – thijsdemaa Nov 02 '18 at 10:23

Encrypt file using certificate resulting in 'Expecting PUBLIC KEY'

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