mirror of https://github.com/CrimsonTome/tldr.git
24 lines
686 B
Markdown
24 lines
686 B
Markdown
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# openssl
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> OpenSSL is a cryptography toolkit.
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- Check an SSL connection
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`openssl s_client -connect www.paypal.com:443`
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- Generate new private key and CSR
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`openssl req -out CSR.csr -new -newkey rsa:2048 -nodes -keyout privateKey.key`
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- Read contents of certificate, private key and CSR file
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`openssl x509 -text -noout -in certificate.crt`
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`openssl rsa -check -in privateKey.key`
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`openssl req -text -noout -verify -in CSR.csr`
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- Check if certificate, private key and CSR have the same MD5 hash
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`openssl x509 -noout -modulus -in certificate.crt | openssl md5`
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`openssl rsa -noout -modulus -in privateKey.key | openssl md5`
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`openssl req -noout -modulus -in CSR.csr | openssl md5`
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