OpenSSL "rsa" - Open Encrypted RSA Keys

Q

How to open an encrypted RSA key file using OpenSSL "rsa" command? I was told the key file is DES encrypted and I know the password.

✍: FYIcenter.com

A

If you are trying to open a password (encrypted) RSA key file using the "rsa" command, you will be prompted for the password as shown below:

C:\Users\fyicenter>\local\openssl\openssl

OpenSSL> rsa -in my_rsa_des.key -check -noout
Enter pass phrase for my_rsa_des.key: noidea
unable to load Private Key
2760:error:06065064:digital envelope routines:EVP_DecryptFinal_ex:
   bad decrypt:.\crypto\evp\evp_enc.c:529:
2760:error:0906A065:PEM routines:PEM_do_header:bad decrypt:.\crypto\pem\pem_lib.c:482:
error in rsa

OpenSSL> rsa -in my_rsa_des.key -check -noout
Enter pass phrase for my_rsa_des.key: fyicenter
RSA key ok

Options used in this command are:

"-in my_rsa_des.key" - Read the RSA private key file.
"-check" - Verify key consistency.
"noidea" - The incorrect password of the key file. You get errors.
"fyicenter" - The correct password of the key file.

⇒ OpenSSL "rsa -aes*" - Re-Encrypt RSA Keys

⇐ OpenSSL "genrsa -des" - DES Encrypt RSA Keys

⇑ OpenSSL "genrsa" and "rsa" Commands

⇑⇑ OpenSSL Tutorials

2024-01-19, 4622🔥, 1💬

OpenSSL "rsa -pubout" - Extract RSA Public Key
How to extract the public key from an RSA key file using OpenSSL "rsa" command? If you want to extract the public key out from an RSA key file (private key an public key), you can use the OpenSSL "rsa -pubout" command as shown below: C:\Users\fyicenter>\loc al\openssl\openssl.exeOpenSSL&g... 2017-02-03, 9974🔥, 0💬

OpenSSL "genrsa 32" - Generate RSA Short Keys
How to generate a new RSA key pair with a shorter key size using OpenSSL "genrsa" command? If you need a new RSA key pair with a shorter key size for testing purpose, you can use the OpenSSL "genrsa" command as shown below: C:\Users\fyicenter>\loc al\openssl\openssl.exeOpenSSL> genrsa ... 2023-09-21, 9724🔥, 3💬

💬 2023-09-21 fredy: Good

💬 2020-10-17 FYIcenter.com: @vena, the answer is yes as shown in this tutorial.

💬 2020-10-16 vena: can we already generate 32 bits key with openssl ?

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How to generate a new RSA key pair and encrypt the output with a DES password using OpenSSL "genrsa" command? If you want to secure your new RSA private key with a DES encryption, you can use the OpenSSL "genrsa -des" command as shown below: C:\Users\fyicenter>\loc al\openssl\opensslOpenSSL&a... 2017-01-14, 5121🔥, 0💬

OpenSSL "rsa" - Open Encrypted RSA Keys
How to open an encrypted RSA key file using OpenSSL "rsa" command? I was told the key file is DES encrypted and I know the password. If you are trying to open a password (encrypted) RSA key file using the "rsa" command, you will be prompted for the password as shown below: C:\Users\fyicenter>... 2024-01-19, 4623🔥, 1💬

OpenSSL "dsaparam" - Generate DSA Parameters
How to generate a new DSA parameter file using OpenSSL "dsaparam" command? If you need a new DSA paramter file in order to create new DSA keys, you can use the OpenSSL "dsaparam" command as shown below: C:\Users\fyicenter>\loc al\openssl\openssl.exeOpenSSL> dsaparam -out my_dsa_2048.pr... 2017-01-07, 4377🔥, 0💬

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What can I use OpenSSL "dsaparam" command for? What are options supported by the "dsaparam" command? OpenSSL "dsaparam" command is a utility to generate DSA parameter files that are needed to generate DSA private key and public key pairs. Because generating DSA parameters is a slow job, DSA key gene... 2017-01-07, 3647🔥, 0💬

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Where to find tutorials on using OpenSSL "gendsa" and "dsa" commands? Here is a collection of tutorials on using OpenSSL "gendsa" and "dsa" commands compiled by FYIcenter.com team. Note that "gendsa" and "dsa" commands are superseded by "genpkey" and "pKey" commands now. Stop using "gendsa" and "dsa... 2017-01-11, 3217🔥, 0💬

OpenSSL "gendsa" Command Options
What can I use OpenSSL "gendsa" command for? What are options supported by the "gendsa" command? OpenSSL "gendsa" command is a utility to generate DSA (Digital Signature Algorithm) private key and public key pairs. Here are options supported by the "gendsa" command: C:\Users\fyicenter>\loc al\... 2017-01-07, 2914🔥, 0💬

OpenSSL "rsa -aes*" - Re-Encrypt RSA Keys
How to re-encrypt an RSA key file using OpenSSL "rsa" command? I want to change the encryption password, and maybe change the encryption algorithm. If you want to encrypt an existing RSA key file again, you can use the "rsa -aes*" command as shown below: C:\Users\fyicenter>\loc al\openssl\open... 2017-01-11, 2628🔥, 0💬

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