372 lines
13 KiB
Python
372 lines
13 KiB
Python
#!/usr/bin/env python3
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"""
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Stegasoo CLI - Command-line interface for steganography operations.
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Usage:
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stegasoo generate [OPTIONS]
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stegasoo encode [OPTIONS]
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stegasoo decode [OPTIONS]
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stegasoo info [OPTIONS]
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"""
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import sys
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from pathlib import Path
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from typing import Optional
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import click
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# Add parent to path for development
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sys.path.insert(0, str(Path(__file__).parent.parent.parent / 'src'))
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import stegasoo
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from stegasoo import (
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encode, decode, generate_credentials,
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export_rsa_key_pem, load_rsa_key,
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validate_image, calculate_capacity,
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get_day_from_date, parse_date_from_filename,
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DAY_NAMES, __version__,
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StegasooError, DecryptionError, ExtractionError,
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)
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# ============================================================================
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# CLI SETUP
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# ============================================================================
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CONTEXT_SETTINGS = dict(help_option_names=['-h', '--help'])
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@click.group(context_settings=CONTEXT_SETTINGS)
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@click.version_option(__version__, '-v', '--version')
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def cli():
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"""
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Stegasoo - Secure steganography with hybrid authentication.
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Hide encrypted messages in images using a combination of:
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\b
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• Reference photo (something you have)
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• Daily passphrase (something you know)
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• Static PIN or RSA key (additional security)
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"""
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pass
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# ============================================================================
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# GENERATE COMMAND
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# ============================================================================
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@cli.command()
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@click.option('--pin/--no-pin', default=True, help='Generate a PIN (default: yes)')
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@click.option('--rsa/--no-rsa', default=False, help='Generate an RSA key')
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@click.option('--pin-length', type=click.IntRange(6, 9), default=6, help='PIN length (6-9)')
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@click.option('--rsa-bits', type=click.Choice(['2048', '3072', '4096']), default='2048', help='RSA key size')
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@click.option('--words', type=click.IntRange(3, 12), default=3, help='Words per phrase (3-12)')
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@click.option('--output', '-o', type=click.Path(), help='Save RSA key to file (requires password)')
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@click.option('--password', '-p', help='Password for RSA key file')
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@click.option('--json', 'as_json', is_flag=True, help='Output as JSON')
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def generate(pin, rsa, pin_length, rsa_bits, words, output, password, as_json):
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"""
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Generate credentials for encoding/decoding.
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Creates daily passphrases and optionally a PIN and/or RSA key.
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At least one of --pin or --rsa must be enabled.
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\b
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Examples:
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stegasoo generate
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stegasoo generate --rsa --rsa-bits 4096
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stegasoo generate --rsa -o mykey.pem -p "secretpassword"
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stegasoo generate --no-pin --rsa
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"""
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if not pin and not rsa:
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raise click.UsageError("Must enable at least one of --pin or --rsa")
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if output and not password:
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raise click.UsageError("--password is required when saving RSA key to file")
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if password and len(password) < 8:
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raise click.UsageError("Password must be at least 8 characters")
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try:
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creds = generate_credentials(
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use_pin=pin,
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use_rsa=rsa,
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pin_length=pin_length,
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rsa_bits=int(rsa_bits),
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words_per_phrase=words
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)
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if as_json:
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import json
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data = {
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'phrases': creds.phrases,
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'pin': creds.pin,
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'rsa_key': creds.rsa_key_pem,
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'entropy': {
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'phrase': creds.phrase_entropy,
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'pin': creds.pin_entropy,
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'rsa': creds.rsa_entropy,
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'total': creds.total_entropy,
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}
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}
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click.echo(json.dumps(data, indent=2))
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return
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# Pretty output
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click.echo()
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click.secho("═" * 60, fg='cyan')
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click.secho(" STEGASOO CREDENTIALS", fg='cyan', bold=True)
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click.secho("═" * 60, fg='cyan')
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click.echo()
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click.secho("⚠️ MEMORIZE THESE AND CLOSE THIS WINDOW", fg='yellow', bold=True)
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click.secho(" Do not screenshot or save to file!", fg='yellow')
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click.echo()
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if creds.pin:
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click.secho("─── STATIC PIN ───", fg='green')
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click.secho(f" {creds.pin}", fg='bright_yellow', bold=True)
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click.echo()
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click.secho("─── DAILY PHRASES ───", fg='green')
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for day in DAY_NAMES:
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phrase = creds.phrases[day]
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click.echo(f" {day:9} │ ", nl=False)
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click.secho(phrase, fg='bright_white')
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click.echo()
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if creds.rsa_key_pem:
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click.secho("─── RSA KEY ───", fg='green')
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if output:
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# Save to file
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private_key = load_rsa_key(creds.rsa_key_pem.encode())
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encrypted_pem = export_rsa_key_pem(private_key, password)
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Path(output).write_bytes(encrypted_pem)
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click.secho(f" Saved to: {output}", fg='bright_white')
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click.secho(f" Password: {'*' * len(password)}", dim=True)
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else:
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click.echo(creds.rsa_key_pem)
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click.echo()
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click.secho("─── SECURITY ───", fg='green')
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click.echo(f" Phrase entropy: {creds.phrase_entropy} bits")
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if creds.pin:
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click.echo(f" PIN entropy: {creds.pin_entropy} bits")
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if creds.rsa_key_pem:
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click.echo(f" RSA entropy: {creds.rsa_entropy} bits")
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click.echo(f" Combined: {creds.total_entropy} bits")
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click.secho(f" + photo entropy: 80-256 bits", dim=True)
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click.echo()
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except Exception as e:
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raise click.ClickException(str(e))
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# ============================================================================
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# ENCODE COMMAND
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# ============================================================================
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@cli.command()
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@click.option('--ref', '-r', required=True, type=click.Path(exists=True), help='Reference photo')
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@click.option('--carrier', '-c', required=True, type=click.Path(exists=True), help='Carrier image')
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@click.option('--message', '-m', help='Message to encode (or use stdin)')
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@click.option('--message-file', '-f', type=click.Path(exists=True), help='Read message from file')
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@click.option('--phrase', '-p', required=True, help='Day phrase')
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@click.option('--pin', help='Static PIN')
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@click.option('--key', '-k', type=click.Path(exists=True), help='RSA key file')
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@click.option('--key-password', help='RSA key password')
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@click.option('--output', '-o', type=click.Path(), help='Output file (default: auto-generated)')
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@click.option('--date', 'date_str', help='Date override (YYYY-MM-DD)')
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@click.option('--quiet', '-q', is_flag=True, help='Suppress output except errors')
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def encode_cmd(ref, carrier, message, message_file, phrase, pin, key, key_password, output, date_str, quiet):
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"""
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Encode a secret message into an image.
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Requires a reference photo, carrier image, and day phrase.
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Must provide either --pin or --key (or both).
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\b
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Examples:
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stegasoo encode -r photo.jpg -c meme.png -p "apple forest thunder" --pin 123456 -m "secret"
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echo "secret" | stegasoo encode -r photo.jpg -c meme.png -p "word1 word2 word3" --pin 123456
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stegasoo encode -r photo.jpg -c meme.png -p "words" -k mykey.pem --key-password "pass"
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"""
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# Get message
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if message:
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msg = message
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elif message_file:
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msg = Path(message_file).read_text()
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elif not sys.stdin.isatty():
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msg = sys.stdin.read()
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else:
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raise click.UsageError("Must provide message via -m, -f, or stdin")
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# Load key if provided
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rsa_key_data = None
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if key:
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rsa_key_data = Path(key).read_bytes()
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# Validate security factors
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if not pin and not rsa_key_data:
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raise click.UsageError("Must provide --pin or --key (or both)")
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try:
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ref_photo = Path(ref).read_bytes()
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carrier_image = Path(carrier).read_bytes()
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result = encode(
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message=msg,
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reference_photo=ref_photo,
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carrier_image=carrier_image,
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day_phrase=phrase,
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pin=pin or "",
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rsa_key_data=rsa_key_data,
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rsa_password=key_password,
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date_str=date_str,
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)
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# Determine output path
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if output:
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out_path = Path(output)
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else:
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out_path = Path(result.filename)
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# Write output
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out_path.write_bytes(result.stego_image)
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if not quiet:
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click.secho(f"✓ Encoded successfully!", fg='green')
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click.echo(f" Output: {out_path}")
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click.echo(f" Size: {len(result.stego_image):,} bytes")
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click.echo(f" Capacity used: {result.capacity_percent:.1f}%")
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click.echo(f" Date: {result.date_used}")
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except StegasooError as e:
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raise click.ClickException(str(e))
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except Exception as e:
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raise click.ClickException(f"Error: {e}")
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# ============================================================================
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# DECODE COMMAND
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# ============================================================================
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@cli.command()
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@click.option('--ref', '-r', required=True, type=click.Path(exists=True), help='Reference photo')
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@click.option('--stego', '-s', required=True, type=click.Path(exists=True), help='Stego image')
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@click.option('--phrase', '-p', required=True, help='Day phrase')
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@click.option('--pin', help='Static PIN')
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@click.option('--key', '-k', type=click.Path(exists=True), help='RSA key file')
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@click.option('--key-password', help='RSA key password')
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@click.option('--output', '-o', type=click.Path(), help='Save message to file')
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@click.option('--quiet', '-q', is_flag=True, help='Output only the message')
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def decode_cmd(ref, stego, phrase, pin, key, key_password, output, quiet):
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"""
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Decode a secret message from a stego image.
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Must use the same credentials that were used for encoding.
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\b
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Examples:
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stegasoo decode -r photo.jpg -s stego.png -p "apple forest thunder" --pin 123456
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stegasoo decode -r photo.jpg -s stego.png -p "words" -k mykey.pem --key-password "pass"
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stegasoo decode -r photo.jpg -s stego.png -p "words" --pin 123456 -o message.txt
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"""
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# Load key if provided
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rsa_key_data = None
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if key:
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rsa_key_data = Path(key).read_bytes()
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# Validate security factors
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if not pin and not rsa_key_data:
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raise click.UsageError("Must provide --pin or --key (or both)")
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try:
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ref_photo = Path(ref).read_bytes()
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stego_image = Path(stego).read_bytes()
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message = decode(
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stego_image=stego_image,
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reference_photo=ref_photo,
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day_phrase=phrase,
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pin=pin or "",
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rsa_key_data=rsa_key_data,
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rsa_password=key_password,
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)
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if output:
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Path(output).write_text(message)
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if not quiet:
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click.secho(f"✓ Decoded successfully!", fg='green')
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click.echo(f" Saved to: {output}")
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else:
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if quiet:
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click.echo(message)
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else:
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click.secho("✓ Decoded successfully!", fg='green')
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click.echo()
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click.echo(message)
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except (DecryptionError, ExtractionError) as e:
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raise click.ClickException(f"Decryption failed: {e}")
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except StegasooError as e:
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raise click.ClickException(str(e))
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except Exception as e:
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raise click.ClickException(f"Error: {e}")
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# ============================================================================
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# INFO COMMAND
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# ============================================================================
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@cli.command()
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@click.argument('image', type=click.Path(exists=True))
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def info(image):
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"""
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Show information about an image.
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Displays dimensions, capacity, and attempts to detect date from filename.
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"""
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try:
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image_data = Path(image).read_bytes()
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result = validate_image(image_data, check_size=False)
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if not result.is_valid:
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raise click.ClickException(result.error_message)
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capacity = calculate_capacity(image_data)
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# Try to get date from filename
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date_str = parse_date_from_filename(image)
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day_name = get_day_from_date(date_str) if date_str else None
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click.echo()
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click.secho(f"Image: {image}", bold=True)
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click.echo(f" Dimensions: {result.details['width']} × {result.details['height']}")
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click.echo(f" Pixels: {result.details['pixels']:,}")
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click.echo(f" Mode: {result.details['mode']}")
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click.echo(f" Format: {result.details['format']}")
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click.echo(f" Capacity: ~{capacity:,} bytes ({capacity // 1024} KB)")
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if date_str:
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click.echo(f" Embed date: {date_str} ({day_name})")
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click.echo()
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except Exception as e:
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raise click.ClickException(str(e))
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# ============================================================================
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# MAIN
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# ============================================================================
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def main():
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"""Entry point."""
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cli()
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if __name__ == '__main__':
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main()
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