Generate Public Key From Private Pem

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The basic function is to create public and private key pairs. PuTTY stores keys in its own format in.ppk files. However, the tool can also convert keys to and from other formats. PuTTYgen.exe on Windows is a graphical tool. Using PuTTYgen to generate an SSH key. Quick steps: Create and use an SSH public-private key pair for Linux VMs in Azure.; 4 minutes to read +4; In this article. With a secure shell (SSH) key pair, you can create virtual machines (VMs) in Azure that use SSH keys for authentication, eliminating the need for passwords to sign in.

You can convert your Putty private keys (.ppk) to base64 files for OpenSSH or OpenSSL.

With puttygen on Linux/BSD/Unix-like

If you are using the unix cli tool, run the following command:

You can also generate a public key for your SSH servers using one of the two following commands based on your server:

You private key can be used with OpenSSH or Openssl-based software. The public key can be used with OpenSSH.

Although we recommend using different private keys as much as possible, you can reuse the newly generated key to make a CSR using OpenSSL.

$ openssl rsa -pubout -in privatekey.pem -out publickey.pem writing RSA key A new file is created, publickey.pem, with the public key. It is relatively easy to do some cryptographic calculations to calculate the public key from the prime1 and prime2 values in the public key file. However, OpenSSL has already pre-calculated the public key.

With Puttygen on Windows

Generate public key from private openssl

If you can't locate your private key, you can generate a new CSR and then rekey your GoDaddy certificate to continue the installation process. Get Private key from SSL Certificate Just take previous private key and copy it into text file, save as something.key and upload with GD crt and crt bundle. Generate public and private keys # Generate a private key openssl genrsa -out./private.pem 2048 # Generate a public key from a private key openssl rsa -pubout-in private.pem -out./public.pem # Get the fingerprint from the private key openssl rsa -pubout-outform DER -in private.pem openssl md5 -c Create client JKS from pem files. This is a passworded container format that contains both public and private certificate pairs. Unlike.pem files, this container is fully encrypted. Openssl can turn this into a.pem file with both public and private keys: openssl pkcs12 -in file-to-convert.p12 -out converted-file.pem -nodes; A few other formats that show up from time to time.

  • Open Puttygen and click on Load in the Actions section.
  • Then, select your PPK file.
  • Your key has been imported.
  • Then, go to the Conversions menu and select Export OpenSSH key.
  • Name your private key and save it.
  • In the main window, select Save public key in the Actions section.
  • Name and save your public key.

See Also

Last edited on 12/27/2018 15:46:28 --- [search]
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Whether you're using an Oracle client (see Software Development Kits and Command Line Interface) or a client you built yourself, you need to do the following:

Openssl Generate Public Private Key

  1. Create a user in IAM for the person or system who will be calling the API, and put that user in at least one IAM group with any desired permissions. See Adding Users. You can skip this if the user exists already.

  2. Get these items:

    • RSA key pair in PEM format (minimum 2048 bits). See How to Generate an API Signing Key.
    • Fingerprint of the public key. See How to Get the Key's Fingerprint.
    • Tenancy's OCID and user's OCID. See Where to Get the Tenancy's OCID and User's OCID.
  3. Upload the public key from the key pair in the Console. See How to Upload the Public Key.
  4. If you're using one of the Oracle SDKs or tools, supply the required credentials listed above in either a configuration file or a config object in the code. See SDK and CLI Configuration File. If you're instead building your own client, see Request Signatures.
Important

This key pair is not the SSH key that you use to access compute instances. See Security Credentials.

Both the private key and public key must be in PEM format (not SSH-RSA format). The public key in PEM format looks something like this:

How to Generate an API Signing Key

You can use the following OpenSSL commands to generate the key pair in the required PEM format. If you're using Windows, you'll need to install Git Bash for Windows and run the commands with that tool.

  1. If you haven't already, create a .oci directory to store the credentials:

  2. Generate the private key with one of the following commands.

    • Recommended: To generate the key, encrypted with a passphrase you provide when prompted:

      Note: For Windows, you may need to insert -passout stdin to be prompted for a passphrase. The prompt will just be the blinking cursor, with no text.

    • To generate the key with no passphrase:

  3. Ensure that only you can read the private key file:

  4. Generate the public key:

    Note: For Windows, if you generated the private key with a passphrase, you may need to insert -passin stdin to be prompted for the passphrase. The prompt will just be the blinking cursor, with no text.

  5. Copy the contents of the public key to the clipboard using pbcopy, xclip or a similar tool (you'll need to paste the value into the Console later). For example:

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Your API requests will be signed with your private key, and Oracle will use the public key to verify the authenticity of the request. You must upload the public key to IAM (instructions below).

How to Get the Key's Fingerprint

You can get the key's fingerprint with the following OpenSSL command. If you're using Windows, you'll need to install Git Bash for Windows and run the command with that tool.

When you upload the public key in the Console, the fingerprint is also automatically displayed there. It looks something like this: 12:34:56:78:90:ab:cd:ef:12:34:56:78:90:ab:cd:ef

Where to Get the Tenancy's OCID and User's OCID

Both OCIDs are in the Console, which is located at https://console.us-ashburn-1.oraclecloud.com. If you don't have a login and password for the Console, contact an administrator. If you're not familiar with OCIDs, see Resource Identifiers.

Tenancy's OCID

Get the tenancy OCID from the Oracle Cloud InfrastructureConsole on the Tenancy Details page:

  1. Open the navigation menu, underGovernance and Administration, go to Administration and click Tenancy Details.

  2. The tenancy OCID is shown under Tenancy Information. Click Copy to copy it to your clipboard.

User's OCID

Get the user's OCID in the Console on the page showing the user's details. To get to that page:

  • If you're signed in as the user: Open the Profile menu () and click User Settings.
  • If you're an administrator doing this for another user: Open the navigation menu. Under Governance and Administration, go to Identity and click Users. Select the user from the list.
  • The user OCID is shown under User Information. Click Copy to copy it to your clipboard.

Generate Public Key From Private Pem File

How to Upload the Public Key

Generate Public Private Key Windows

You can upload the PEM public key in the Console, located at https://console.us-ashburn-1.oraclecloud.com. If you don't have a login and password for the Console, contact an administrator.

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  1. Open the Console, and sign in.

  2. View the details for the user who will be calling the API with the key pair:

    • If you're signed in as the user: Open the Profile menu () and click User Settings.
    • If you're an administrator doing this for another user: Open the navigation menu. Under Governance and Administration, go to Identity and click Users. Select the user from the list.
  3. Click Add Public Key.
  4. Paste the contents of the PEM public key in the dialog box and click Add.

The key's fingerprint is displayed (for example, 12:34:56:78:90:ab:cd:ef:12:34:56:78:90:ab:cd:ef).

Notice that after you've uploaded your first public key, you can also use the UploadApiKey API operation to upload additional keys. You can have up to three API key pairs per user. In an API request, you specify the key's fingerprint to indicate which key you're using to sign the request.