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OpenSSL "rsautl -encrypt" vs. "rsautl -verify"

Q

What is the difference between "rsautl -encrypt" and "rsautl -verify" commands?

✍: FYIcenter.com

A

There is only 1 difference between "rsautl -encrypt" and "rsautl -verify" commands:

1. "rsautl -encrypt" and "rsautl -verify" commands apply PKCS#1 v1.5 padding differently:

  • "rsautl -encrypt" adds PKCS#1 v1.5 padding before applying RSA encryptin with an RSA public key.
  • "rsautl -verify" removes PKCS#1 v1.5 padding after applying RSA decryptin with an RSA public key.

So if we are using no padding, "rsautl -encrypt" and "rsautl -verify" have no differences, because RSA encryption and RSA decryption are identical algorithms. In other words, "rsautl -encrypt -raw" and "rsautl -sign -raw" are identical commands.

 

⇒ OpenSSL "rsautl -verify -raw" for RSA Public Key Encryption

⇐ OpenSSL "rsautl -encrypt" vs. "rsautl -sign"

⇑ OpenSSL "rsautl" Command for RSA Keys

⇑⇑ OpenSSL Tutorials

2017-03-11, 1900👍, 0💬

DH Keys DSA Keys EC Keys Firefox General Google Chrome IE (Internet Explorer) Intermediate CA Java VM JDK Keytool Microsoft CertUtil Mozilla CertUtil OpenSSL Other Portecle Publishers Revoked Certificates Root CA RSA Keys Tools Tutorial What Is Windows