Use DeleteKeyPair with an Amazon SDK or CLI

    /// <summary>
    /// Delete an Amazon EC2 key pair.
    /// </summary>
    /// <param name="keyPairName">The name of the key pair to delete.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> DeleteKeyPair(string keyPairName)
    {
        try
        {
            await _amazonEC2.DeleteKeyPairAsync(new DeleteKeyPairRequest(keyPairName)).ConfigureAwait(false);
            return true;
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Couldn't delete the key pair because: {ex.Message}");
            return false;
        }
    }

    /// <summary>
    /// Delete the temporary file where the key pair information was saved.
    /// </summary>
    /// <param name="tempFileName">The path to the temporary file.</param>
    public void DeleteTempFile(string tempFileName)
    {
        if (File.Exists(tempFileName))
        {
            File.Delete(tempFileName);
        }
    }

###############################################################################
# function ec2_delete_keypair
#
# This function deletes an Amazon EC2 ED25519 or 2048-bit RSA key pair.
#
# Parameters:
#       -n key_pair_name - A key pair name.
#
# And:
#       0 - If successful.
#       1 - If it fails.
###############################################################################
function ec2_delete_keypair() {
  local key_pair_name response

  local option OPTARG # Required to use getopts command in a function.
  # bashsupport disable=BP5008
  function usage() {
    echo "function ec2_delete_keypair"
    echo "Deletes an Amazon EC2 ED25519 or 2048-bit RSA key pair."
    echo "  -n key_pair_name - A key pair name."
    echo ""
  }

  # Retrieve the calling parameters.
  while getopts "n:h" option; do
    case "${option}" in
      n) key_pair_name="${OPTARG}" ;;
      h)
        usage
        return 0
        ;;
      \?)
        echo "Invalid parameter"
        usage
        return 1
        ;;
    esac
  done
  export OPTIND=1

  if [[ -z "$key_pair_name" ]]; then
    errecho "ERROR: You must provide a key pair name with the -n parameter."
    usage
    return 1
  fi

  response=$(aws ec2 delete-key-pair \
    --key-name "$key_pair_name") || {
    aws_cli_error_log ${?}
    errecho "ERROR: AWS reports delete-key-pair operation failed.$response"
    return 1
  }

  return 0
}

The utility functions used in this example.

###############################################################################
# function errecho
#
# This function outputs everything sent to it to STDERR (standard error output).
###############################################################################
function errecho() {
  printf "%s\n" "$*" 1>&2
}

##############################################################################
# function aws_cli_error_log()
#
# This function is used to log the error messages from the AWS CLI.
#
# The function expects the following argument:
#         $1 - The error code returned by the AWS CLI.
#
#  Returns:
#          0: - Success.
#
##############################################################################
function aws_cli_error_log() {
  local err_code=$1
  errecho "Error code : $err_code"
  if [ "$err_code" == 1 ]; then
    errecho "  One or more S3 transfers failed."
  elif [ "$err_code" == 2 ]; then
    errecho "  Command line failed to parse."
  elif [ "$err_code" == 130 ]; then
    errecho "  Process received SIGINT."
  elif [ "$err_code" == 252 ]; then
    errecho "  Command syntax invalid."
  elif [ "$err_code" == 253 ]; then
    errecho "  The system environment or configuration was invalid."
  elif [ "$err_code" == 254 ]; then
    errecho "  The service returned an error."
  elif [ "$err_code" == 255 ]; then
    errecho "  255 is a catch-all error."
  fi

  return 0
}

    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::DeleteKeyPairRequest request;

    request.SetKeyName(keyPairName);
    const Aws::EC2::Model::DeleteKeyPairOutcome outcome = ec2Client.DeleteKeyPair(
            request);

    if (!outcome.IsSuccess()) {
        std::cerr << "Failed to delete key pair " << keyPairName <<
                  ":" << outcome.GetError().GetMessage() << std::endl;
    }
    else {
        std::cout << "Successfully deleted key pair named " << keyPairName <<
                  std::endl;
    }

To delete a key pair

The following delete-key-pair example deletes the specified key pair.

aws ec2 delete-key-pair \
    --key-name my-key-pair

Output:

{
    "Return": true,
    "KeyPairId": "key-03c8d3aceb53b507"
}

For more information, see Create and delete key pairs in the Amazon Command Line Interface User Guide.

    public static void deleteKeys(Ec2Client ec2, String keyPair) {
        try {
            DeleteKeyPairRequest request = DeleteKeyPairRequest.builder()
                    .keyName(keyPair)
                    .build();

            ec2.deleteKeyPair(request);
            System.out.println("Successfully deleted key pair named " + keyPair);

        } catch (Ec2Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

import { DeleteKeyPairCommand } from "@aws-sdk/client-ec2";

import { client } from "../libs/client.js";

export const main = async () => {
  const command = new DeleteKeyPairCommand({
    KeyName: "KEY_PAIR_NAME",
  });

  try {
    await client.send(command);
    console.log("Successfully deleted key pair.");
  } catch (err) {
    console.error(err);
  }
};

suspend fun deleteKeys(keyPair: String?) {
    val request =
        DeleteKeyPairRequest {
            keyName = keyPair
        }

    Ec2Client { region = "us-west-2" }.use { ec2 ->
        ec2.deleteKeyPair(request)
        println("Successfully deleted key pair named $keyPair")
    }
}

Example 1: This example deletes the specified key pair. You are prompted for confirmation before the operation proceeds, unless you also specify the Force parameter.

Remove-EC2KeyPair -KeyName my-key-pair

Output:

Confirm
Are you sure you want to perform this action?
Performing operation "Remove-EC2KeyPair (DeleteKeyPair)" on Target "my-key-pair".
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help (default is "Y"):

class KeyPairWrapper:
    """Encapsulates Amazon Elastic Compute Cloud (Amazon EC2) key pair actions."""

    def __init__(self, ec2_resource, key_file_dir, key_pair=None):
        """
        :param ec2_resource: A Boto3 Amazon EC2 resource. This high-level resource
                             is used to create additional high-level objects
                             that wrap low-level Amazon EC2 service actions.
        :param key_file_dir: The folder where the private key information is stored.
                             This should be a secure folder.
        :param key_pair: A Boto3 KeyPair object. This is a high-level object that
                         wraps key pair actions.
        """
        self.ec2_resource = ec2_resource
        self.key_pair = key_pair
        self.key_file_path = None
        self.key_file_dir = key_file_dir

    @classmethod
    def from_resource(cls):
        ec2_resource = boto3.resource("ec2")
        return cls(ec2_resource, tempfile.TemporaryDirectory())


    def delete(self):
        """
        Deletes a key pair.
        """
        if self.key_pair is None:
            logger.info("No key pair to delete.")
            return

        key_name = self.key_pair.name
        try:
            self.key_pair.delete()
            self.key_pair = None
        except ClientError as err:
            logger.error(
                "Couldn't delete key %s. Here's why: %s : %s",
                key_name,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise

    TRY.
        lo_ec2->deletekeypair( iv_keyname = iv_key_name ).
        MESSAGE 'Amazon EC2 key pair deleted.' TYPE 'I'.
      CATCH /aws1/cx_rt_service_generic INTO DATA(lo_exception).
        DATA(lv_error) = |"{ lo_exception->av_err_code }" - { lo_exception->av_err_msg }|.
        MESSAGE lv_error TYPE 'E'.
    ENDTRY.