Fengson
/ publickey
Created
January 24, 2022 08:58
— forked from WeRockStar/publickey
Extract the public key from a certificate
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| Generate public key + sha256 rely on X.509 | |
| 1. openssl s_client -connect api.github.com:443 | openssl x509 -pubkey -noout | openssl rsa -pubin -outform der | openssl dgst -sha256 -binary | openssl enc -base64 | |
| 2. openssl x509 -noout -in certificate.pem -pubkey | openssl asn1parse -noout -inform pem -out public.key openssl dgst -sha256 -binary public.key | openssl enc -base64 | |
| 3. openssl rsa -in my-rsa-key-file.key -outform der -pubout | openssl dgst -sha256 -binary | openssl enc -base64 | |
| 4. openssl req -in my-signing-request.csr -pubkey -noout | openssl pkey -pubin -outform der | openssl dgst -sha256 -binary | openssl enc -base64 | |
| 5. openssl x509 -in my-certificate.crt -pubkey -noout | openssl pkey -pubin -outform der | openssl dgst -sha256 -binary | openssl enc -base64 | |
| Covert PEM to DER | |
| openssl x509 -outform der -in certificate.pem -out certificate.der |