Bash - generate random base64 string

generate_base64.sh

#!/bin/bash

# Generate random base64 string using openssl
# Usage: generate_base64 [length]
#        length: Optional, the length of the base64 string (default is 32)
generate_base64() {
  if [[ "$1" == "--help" ]]; then
    echo "Usage: generate_base64 [length]"
    echo "       length: Optional, the length of the base64 string (default is 32)"
    return
  fi

  local length="${1:-32}"
  openssl rand -base64 "$length"
}

# Check if an argument is provided (e.g., ./generate_base64.sh 64)
if [ $# -eq 1 ]; then
  generate_base64 "$1"
else
  # If no argument is provided, generate the default 32-character base64 string
  generate_base64
fi