OpenSSL "rsautl -decrypt" - Decryption with RSA Private Key
Q
How to decrypt a file with the RSA private key using OpenSSL "rsautl" command? I received a file that is encrypted with my RSA public key.
✍: FYIcenter.com
A
If you receive a file encrypted with your RSA public key and
want to decrypt the file with your RSA private key,
you can use the OpenSSL "rsault -decrypt" command as shown below:
C:\Users\fyicenter>\local\openssl\openssl.exe OpenSSL> rsautl -decrypt -inkey my_rsa.key -in cipher.txt -out decipher.txt OpenSSL> exit C:\Users\fyicenter>type decipher.txt The quick brown fox jumped over the lazy dog.
Options used in the "rsautl" command are:
- "-decrypt" - Decrypt the input data with RSA keys.
- "-inkey my_rsa_pub.key" - Read RSA key, the private key, from the given file.
- "-in cipher.txt" - Read input data, the cipher text, from the given file.
- "-out decipher.txt" - Save output data, the decipher text, to the given file.
⇒ OpenSSL rsautl "data too large for key size" Error
⇐ OpenSSL "rsautl -encrypt" - Encryption with RSA Public Key
2021-06-28, 16124👍, 2💬
