1443 lines
54 KiB
Python
1443 lines
54 KiB
Python
#!/usr/bin/env python3
|
||
"""
|
||
Stegasoo CLI - Command-line interface for steganography operations (v4.0.0).
|
||
|
||
CHANGES in v4.0.0:
|
||
- Added channel key support for deployment/group isolation
|
||
- Messages encoded with a channel key can only be decoded with the same key
|
||
- New `channel` command group for key management
|
||
|
||
CHANGES in v3.2.0:
|
||
- Removed date dependency from all operations
|
||
- Renamed day_phrase → passphrase
|
||
- No longer need to specify or remember encoding dates
|
||
- Default passphrase length increased to 4 words
|
||
|
||
Usage:
|
||
stegasoo generate [OPTIONS]
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||
stegasoo encode [OPTIONS]
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stegasoo decode [OPTIONS]
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||
stegasoo verify [OPTIONS]
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||
stegasoo info [OPTIONS]
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stegasoo compare [OPTIONS]
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||
stegasoo modes [OPTIONS]
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||
stegasoo channel [SUBCOMMAND]
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||
"""
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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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||
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import click
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||
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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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||
# Core operations
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encode, decode,
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# Credential generation
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||
generate_credentials,
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||
generate_passphrase,
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||
generate_pin,
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export_rsa_key_pem,
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load_rsa_key,
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||
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# Validation
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validate_image,
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||
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# Image utilities
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||
get_image_info,
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||
compare_capacity,
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||
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# Steganography functions
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||
has_dct_support,
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||
compare_modes,
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||
will_fit_by_mode,
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||
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# Utilities
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generate_filename,
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||
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# Version
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__version__,
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||
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# Exceptions
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StegasooError,
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DecryptionError,
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ExtractionError,
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||
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# Models
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FilePayload,
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||
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# Channel key functions (v4.0.0)
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generate_channel_key,
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get_channel_key,
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set_channel_key,
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clear_channel_key,
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has_channel_key,
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get_channel_status,
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validate_channel_key,
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format_channel_key,
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get_active_channel_key,
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get_channel_fingerprint,
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)
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# Import constants - try main module first, then constants submodule
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try:
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from stegasoo import (
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EMBED_MODE_LSB,
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EMBED_MODE_DCT,
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EMBED_MODE_AUTO,
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)
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except ImportError:
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from stegasoo.constants import (
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EMBED_MODE_LSB,
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EMBED_MODE_DCT,
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EMBED_MODE_AUTO,
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)
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# Import constants that may not be in main __init__
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try:
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from stegasoo.constants import (
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DEFAULT_PASSPHRASE_WORDS,
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DEFAULT_PIN_LENGTH,
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MIN_PIN_LENGTH,
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MAX_PIN_LENGTH,
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)
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except ImportError:
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# Fallback defaults if constants not available
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DEFAULT_PASSPHRASE_WORDS = 4
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DEFAULT_PIN_LENGTH = 6
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MIN_PIN_LENGTH = 6
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MAX_PIN_LENGTH = 9
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# Optional: strip_image_metadata from utils
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try:
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from stegasoo.utils import strip_image_metadata
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HAS_STRIP_METADATA = True
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||
except ImportError:
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||
HAS_STRIP_METADATA = False
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# QR Code utilities
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try:
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from stegasoo.qr_utils import (
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extract_key_from_qr_file,
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generate_qr_code,
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has_qr_read, has_qr_write,
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||
can_fit_in_qr, needs_compression,
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)
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HAS_QR = True
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||
except ImportError:
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HAS_QR = False
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has_qr_read = lambda: False
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has_qr_write = lambda: False
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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 or files in images using a combination of:
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\b
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- Reference photo (something you have)
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- Passphrase (something you know)
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- Static PIN or RSA key (additional security)
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- Channel key (deployment/group isolation) [v4.0.0]
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\b
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Version 4.0.0 Changes:
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- Channel key support for group/deployment isolation
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- Messages encoded with a channel key require the same key to decode
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- New `stegasoo channel` command for key management
|
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|
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\b
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Embedding Modes:
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- LSB mode (default): Full color output, higher capacity
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- DCT mode: Frequency domain, ~20% capacity, better stealth
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\b
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DCT Options:
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- Color mode: grayscale (default) or color (preserves colors)
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- Output format: png (lossless) or jpeg (smaller, natural)
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"""
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pass
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# ============================================================================
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# CHANNEL KEY HELPERS
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# ============================================================================
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def resolve_channel_key_option(channel: Optional[str], channel_file: Optional[str],
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no_channel: bool) -> Optional[str]:
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"""
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Resolve channel key from CLI options.
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Returns:
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None: Use server-configured key (auto mode)
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"": Public mode (no channel key)
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str: Explicit channel key
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"""
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if no_channel:
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return "" # Public mode
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if channel_file:
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# Load from file
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path = Path(channel_file)
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if not path.exists():
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raise click.ClickException(f"Channel key file not found: {channel_file}")
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key = path.read_text().strip()
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if not validate_channel_key(key):
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raise click.ClickException(f"Invalid channel key format in file: {channel_file}")
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return key
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if channel:
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if channel.lower() == 'auto':
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return None # Use server config
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# Explicit key provided
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if not validate_channel_key(channel):
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raise click.ClickException(
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f"Invalid channel key format. Expected: XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX\n"
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f"Generate a new key with: stegasoo channel generate"
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)
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return channel
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# Default: use server-configured key (auto mode)
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return None
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def format_channel_status_line(quiet: bool = False) -> Optional[str]:
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"""Get a one-line status for channel key configuration."""
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if quiet:
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return None
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status = get_channel_status()
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if status['mode'] == 'public':
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return None
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return f"Channel: {status['fingerprint']} ({status['source']})"
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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=DEFAULT_PIN_LENGTH,
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help=f'PIN length (6-9, default: {DEFAULT_PIN_LENGTH})')
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@click.option('--rsa-bits', type=click.Choice(['2048', '3072', '4096']), default='2048',
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help='RSA key size')
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@click.option('--words', type=click.IntRange(3, 12), default=DEFAULT_PASSPHRASE_WORDS,
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help=f'Words per passphrase (default: {DEFAULT_PASSPHRASE_WORDS})')
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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 a passphrase 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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v3.2.0: Single passphrase (no more daily rotation!)
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Default increased to 4 words for better security.
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\b
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Examples:
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stegasoo generate
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stegasoo generate --words 5
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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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passphrase_words=words, # v3.2.0: renamed parameter
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rsa_password=password if output else None,
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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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'passphrase': creds.passphrase,
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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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'passphrase': creds.passphrase_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 (v4.0.0)", 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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||
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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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||
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click.secho("─── PASSPHRASE ───", fg='green')
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click.secho(f" {creds.passphrase}", fg='bright_white', bold=True)
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click.echo()
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||
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if creds.rsa_key_pem:
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click.secho("─── RSA KEY ───", fg='green')
|
||
if output:
|
||
# Save to file
|
||
private_key = load_rsa_key(creds.rsa_key_pem.encode())
|
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encrypted_pem = export_rsa_key_pem(private_key, password)
|
||
Path(output).write_bytes(encrypted_pem)
|
||
click.secho(f" Saved to: {output}", fg='bright_white')
|
||
click.secho(f" Password: {'*' * len(password)}", dim=True)
|
||
else:
|
||
click.echo(creds.rsa_key_pem)
|
||
click.echo()
|
||
|
||
click.secho("─── SECURITY ───", fg='green')
|
||
click.echo(f" Passphrase entropy: {creds.passphrase_entropy} bits ({words} words)")
|
||
if creds.pin:
|
||
click.echo(f" PIN entropy: {creds.pin_entropy} bits")
|
||
if creds.rsa_key_pem:
|
||
click.echo(f" RSA entropy: {creds.rsa_entropy} bits")
|
||
click.echo(f" Combined: {creds.total_entropy} bits")
|
||
click.secho(f" + photo entropy: 80-256 bits", dim=True)
|
||
click.echo()
|
||
|
||
# Show channel key status
|
||
if has_channel_key():
|
||
status = get_channel_status()
|
||
click.secho("─── CHANNEL KEY ───", fg='magenta')
|
||
click.echo(f" Status: Private mode")
|
||
click.echo(f" Fingerprint: {status['fingerprint']}")
|
||
click.secho(f" (configured via {status['source']})", dim=True)
|
||
click.echo()
|
||
|
||
click.secho("✓ v4.0.0: Use this passphrase anytime - no date needed!", fg='cyan')
|
||
click.echo()
|
||
|
||
except Exception as e:
|
||
raise click.ClickException(str(e))
|
||
|
||
|
||
# ============================================================================
|
||
# CHANNEL COMMAND GROUP (v4.0.0)
|
||
# ============================================================================
|
||
|
||
@cli.group()
|
||
def channel():
|
||
"""
|
||
Manage channel keys for deployment/group isolation.
|
||
|
||
Channel keys allow different deployments or groups to use Stegasoo
|
||
without being able to read each other's messages, even with identical
|
||
credentials.
|
||
|
||
\b
|
||
Key Storage (checked in order):
|
||
1. Environment variable: STEGASOO_CHANNEL_KEY
|
||
2. Project config: ./config/channel.key
|
||
3. User config: ~/.stegasoo/channel.key
|
||
|
||
\b
|
||
Subcommands:
|
||
generate Create a new channel key
|
||
show Display current channel key status
|
||
set Save a channel key to config file
|
||
clear Remove channel key from config
|
||
|
||
\b
|
||
Examples:
|
||
stegasoo channel generate
|
||
stegasoo channel show
|
||
stegasoo channel set XXXX-XXXX-...
|
||
stegasoo channel clear
|
||
"""
|
||
pass
|
||
|
||
|
||
@channel.command('generate')
|
||
@click.option('--save', '-s', is_flag=True, help='Save to user config (~/.stegasoo/channel.key)')
|
||
@click.option('--save-project', is_flag=True, help='Save to project config (./config/channel.key)')
|
||
@click.option('--env', '-e', is_flag=True, help='Output as environment variable export')
|
||
@click.option('--quiet', '-q', is_flag=True, help='Output only the key')
|
||
def channel_generate(save, save_project, env, quiet):
|
||
"""
|
||
Generate a new channel key.
|
||
|
||
Creates a cryptographically secure 256-bit channel key in the format:
|
||
XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX
|
||
|
||
\b
|
||
Examples:
|
||
# Just display a new key
|
||
stegasoo channel generate
|
||
|
||
# Save to user config
|
||
stegasoo channel generate --save
|
||
|
||
# Output for .env file
|
||
stegasoo channel generate --env >> .env
|
||
|
||
# For scripts
|
||
KEY=$(stegasoo channel generate -q)
|
||
"""
|
||
key = generate_channel_key()
|
||
|
||
if save and save_project:
|
||
raise click.UsageError("Cannot use both --save and --save-project")
|
||
|
||
if save:
|
||
set_channel_key(key, location='user')
|
||
if not quiet:
|
||
click.secho("✓ Channel key saved to ~/.stegasoo/channel.key", fg='green')
|
||
click.echo()
|
||
|
||
if save_project:
|
||
set_channel_key(key, location='project')
|
||
if not quiet:
|
||
click.secho("✓ Channel key saved to ./config/channel.key", fg='green')
|
||
click.echo()
|
||
|
||
if env:
|
||
click.echo(f"STEGASOO_CHANNEL_KEY={key}")
|
||
elif quiet:
|
||
click.echo(key)
|
||
else:
|
||
click.echo()
|
||
click.secho("─── NEW CHANNEL KEY ───", fg='cyan', bold=True)
|
||
click.echo()
|
||
click.secho(f" {key}", fg='bright_yellow', bold=True)
|
||
click.echo()
|
||
|
||
fingerprint = f"{key[:4]}-••••-••••-••••-••••-••••-••••-{key[-4:]}"
|
||
click.echo(f" Fingerprint: {fingerprint}")
|
||
click.echo()
|
||
|
||
click.secho("Usage:", dim=True)
|
||
click.echo(" # Environment variable (recommended)")
|
||
click.echo(f" export STEGASOO_CHANNEL_KEY={key}")
|
||
click.echo()
|
||
click.echo(" # Or save to config")
|
||
click.echo(" stegasoo channel generate --save")
|
||
click.echo()
|
||
click.echo(" # Or add to .env file")
|
||
click.echo(" stegasoo channel generate --env >> .env")
|
||
click.echo()
|
||
|
||
|
||
@channel.command('show')
|
||
@click.option('--reveal', '-r', is_flag=True, help='Show full key (not just fingerprint)')
|
||
@click.option('--json', 'as_json', is_flag=True, help='Output as JSON')
|
||
def channel_show(reveal, as_json):
|
||
"""
|
||
Display current channel key status.
|
||
|
||
Shows whether a channel key is configured and where it comes from.
|
||
By default shows only fingerprint; use --reveal to see full key.
|
||
|
||
\b
|
||
Examples:
|
||
stegasoo channel show
|
||
stegasoo channel show --reveal
|
||
stegasoo channel show --json
|
||
"""
|
||
status = get_channel_status()
|
||
|
||
if as_json:
|
||
import json
|
||
output = {
|
||
'mode': status['mode'],
|
||
'configured': status['configured'],
|
||
'fingerprint': status.get('fingerprint'),
|
||
'source': status.get('source'),
|
||
}
|
||
if reveal and status['configured']:
|
||
output['key'] = status.get('key')
|
||
click.echo(json.dumps(output, indent=2))
|
||
return
|
||
|
||
click.echo()
|
||
click.secho("─── CHANNEL KEY STATUS ───", fg='cyan', bold=True)
|
||
click.echo()
|
||
|
||
if status['mode'] == 'public':
|
||
click.secho(" Mode: PUBLIC", fg='yellow', bold=True)
|
||
click.echo(" No channel key configured.")
|
||
click.echo()
|
||
click.secho(" Messages can be read by any Stegasoo installation", dim=True)
|
||
click.secho(" with matching credentials.", dim=True)
|
||
else:
|
||
click.secho(" Mode: PRIVATE", fg='green', bold=True)
|
||
click.echo(f" Fingerprint: {status['fingerprint']}")
|
||
click.echo(f" Source: {status['source']}")
|
||
|
||
if reveal:
|
||
click.echo()
|
||
click.secho(f" Full key: {status['key']}", fg='bright_yellow')
|
||
|
||
click.echo()
|
||
click.secho(" Messages require this channel key to decode.", dim=True)
|
||
|
||
click.echo()
|
||
|
||
|
||
@channel.command('set')
|
||
@click.argument('key', required=False)
|
||
@click.option('--file', '-f', 'key_file', type=click.Path(exists=True), help='Read key from file')
|
||
@click.option('--project', '-p', is_flag=True, help='Save to project config instead of user config')
|
||
def channel_set(key, key_file, project):
|
||
"""
|
||
Save a channel key to config file.
|
||
|
||
Saves to user config (~/.stegasoo/channel.key) by default,
|
||
or project config (./config/channel.key) with --project.
|
||
|
||
\b
|
||
Examples:
|
||
stegasoo channel set XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX
|
||
stegasoo channel set --file channel.key
|
||
stegasoo channel set XXXX-... --project
|
||
"""
|
||
if not key and not key_file:
|
||
raise click.UsageError("Must provide KEY argument or --file option")
|
||
|
||
if key and key_file:
|
||
raise click.UsageError("Cannot use both KEY argument and --file option")
|
||
|
||
if key_file:
|
||
key = Path(key_file).read_text().strip()
|
||
|
||
if not validate_channel_key(key):
|
||
raise click.ClickException(
|
||
f"Invalid channel key format.\n"
|
||
f"Expected: XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX\n"
|
||
f"Generate a new key with: stegasoo channel generate"
|
||
)
|
||
|
||
location = 'project' if project else 'user'
|
||
set_channel_key(key, location=location)
|
||
|
||
status = get_channel_status()
|
||
click.secho(f"✓ Channel key saved", fg='green')
|
||
click.echo(f" Location: {status['source']}")
|
||
click.echo(f" Fingerprint: {status['fingerprint']}")
|
||
|
||
|
||
@channel.command('clear')
|
||
@click.option('--project', '-p', is_flag=True, help='Clear project config instead of user config')
|
||
@click.option('--all', 'clear_all', is_flag=True, help='Clear both user and project configs')
|
||
@click.option('--force', '-f', is_flag=True, help='Skip confirmation')
|
||
def channel_clear(project, clear_all, force):
|
||
"""
|
||
Remove channel key from config.
|
||
|
||
Clears user config by default. Use --project for project config,
|
||
or --all to clear both.
|
||
|
||
Note: This does not affect environment variables.
|
||
|
||
\b
|
||
Examples:
|
||
stegasoo channel clear
|
||
stegasoo channel clear --project
|
||
stegasoo channel clear --all
|
||
"""
|
||
if not force:
|
||
if clear_all:
|
||
msg = "Clear channel key from both user and project configs?"
|
||
elif project:
|
||
msg = "Clear channel key from project config (./config/channel.key)?"
|
||
else:
|
||
msg = "Clear channel key from user config (~/.stegasoo/channel.key)?"
|
||
|
||
if not click.confirm(msg):
|
||
click.echo("Cancelled.")
|
||
return
|
||
|
||
if clear_all:
|
||
clear_channel_key(location='user')
|
||
clear_channel_key(location='project')
|
||
click.secho("✓ Cleared channel key from user and project configs", fg='green')
|
||
elif project:
|
||
clear_channel_key(location='project')
|
||
click.secho("✓ Cleared channel key from project config", fg='green')
|
||
else:
|
||
clear_channel_key(location='user')
|
||
click.secho("✓ Cleared channel key from user config", fg='green')
|
||
|
||
# Show current status
|
||
status = get_channel_status()
|
||
if status['configured']:
|
||
click.echo()
|
||
click.secho(f"Note: Channel key still active from {status['source']}", fg='yellow')
|
||
click.echo(f" Fingerprint: {status['fingerprint']}")
|
||
else:
|
||
click.echo(" Mode is now: PUBLIC")
|
||
|
||
|
||
# ============================================================================
|
||
# ENCODE COMMAND
|
||
# ============================================================================
|
||
|
||
@cli.command()
|
||
@click.option('--ref', '-r', required=True, type=click.Path(exists=True), help='Reference photo')
|
||
@click.option('--carrier', '-c', required=True, type=click.Path(exists=True), help='Carrier image')
|
||
@click.option('--message', '-m', help='Text message to encode')
|
||
@click.option('--message-file', '-f', type=click.Path(exists=True), help='Read text message from file')
|
||
@click.option('--embed-file', '-e', type=click.Path(exists=True), help='Embed a file (binary)')
|
||
@click.option('--passphrase', '-p', required=True, help='Passphrase')
|
||
@click.option('--pin', help='Static PIN')
|
||
@click.option('--key', '-k', type=click.Path(exists=True), help='RSA key file (.pem)')
|
||
@click.option('--key-qr', type=click.Path(exists=True), help='RSA key from QR code image')
|
||
@click.option('--key-password', help='RSA key password (for encrypted .pem files)')
|
||
@click.option('--channel', 'channel_key', help='Channel key (or "auto" for server config)')
|
||
@click.option('--channel-file', type=click.Path(exists=True), help='Read channel key from file')
|
||
@click.option('--no-channel', is_flag=True, help='Force public mode (no channel key)')
|
||
@click.option('--output', '-o', type=click.Path(), help='Output file (default: auto-generated)')
|
||
@click.option('--mode', 'embed_mode', type=click.Choice(['lsb', 'dct']), default='lsb',
|
||
help='Embedding mode: lsb (default, color) or dct (requires scipy)')
|
||
@click.option('--dct-format', 'dct_output_format', type=click.Choice(['png', 'jpeg']), default='png',
|
||
help='DCT output format: png (lossless, default) or jpeg (smaller)')
|
||
@click.option('--dct-color', 'dct_color_mode', type=click.Choice(['grayscale', 'color']), default='grayscale',
|
||
help='DCT color mode: grayscale (default) or color (preserves original colors)')
|
||
@click.option('--quiet', '-q', is_flag=True, help='Suppress output except errors')
|
||
def encode_cmd(ref, carrier, message, message_file, embed_file, passphrase, pin, key, key_qr,
|
||
key_password, channel_key, channel_file, no_channel, output, embed_mode,
|
||
dct_output_format, dct_color_mode, quiet):
|
||
"""
|
||
Encode a secret message or file into an image.
|
||
|
||
Requires a reference photo, carrier image, and passphrase.
|
||
Must provide either --pin or --key/--key-qr (or both).
|
||
|
||
v4.0.0: Channel key support for deployment isolation.
|
||
v3.2.0: No --date parameter needed! Encode and decode anytime.
|
||
|
||
\b
|
||
Channel Key Options:
|
||
(no option) Use server-configured key (auto mode)
|
||
--channel KEY Use explicit channel key
|
||
--channel-file F Read channel key from file
|
||
--no-channel Force public mode (no isolation)
|
||
|
||
\b
|
||
Embedding Modes:
|
||
--mode lsb Spatial LSB embedding (default)
|
||
- Full color output (PNG/BMP)
|
||
- Higher capacity (~375 KB/megapixel)
|
||
|
||
--mode dct DCT domain embedding (requires scipy)
|
||
- Configurable color/grayscale output
|
||
- Lower capacity (~75 KB/megapixel)
|
||
- Better resistance to visual analysis
|
||
|
||
\b
|
||
Examples:
|
||
# Text message with PIN (auto channel key)
|
||
stegasoo encode -r photo.jpg -c meme.png -p "apple forest thunder" --pin 123456 -m "secret"
|
||
|
||
# Explicit channel key
|
||
stegasoo encode -r photo.jpg -c meme.png -p "words here" --pin 123456 -m "msg" \\
|
||
--channel ABCD-1234-EFGH-5678-IJKL-9012-MNOP-3456
|
||
|
||
# Public mode (no channel key)
|
||
stegasoo encode -r photo.jpg -c meme.png -p "words" --pin 123456 -m "msg" --no-channel
|
||
"""
|
||
# Check DCT mode availability
|
||
if embed_mode == 'dct' and not has_dct_support():
|
||
raise click.ClickException(
|
||
"DCT mode requires scipy. Install with: pip install scipy"
|
||
)
|
||
|
||
# Warn if DCT options used with LSB mode
|
||
if embed_mode == 'lsb':
|
||
if dct_output_format != 'png' or dct_color_mode != 'grayscale':
|
||
if not quiet:
|
||
click.secho("Note: --dct-format and --dct-color only apply to DCT mode", fg='yellow', dim=True)
|
||
|
||
# Resolve channel key
|
||
try:
|
||
resolved_channel_key = resolve_channel_key_option(channel_key, channel_file, no_channel)
|
||
except click.ClickException:
|
||
raise
|
||
|
||
# Determine what to encode
|
||
payload = None
|
||
|
||
if embed_file:
|
||
# Binary file embedding
|
||
payload = FilePayload.from_file(embed_file)
|
||
if not quiet:
|
||
click.echo(f"Embedding file: {payload.filename} ({len(payload.data):,} bytes)")
|
||
elif message:
|
||
payload = message
|
||
elif message_file:
|
||
payload = Path(message_file).read_text()
|
||
elif not sys.stdin.isatty():
|
||
payload = sys.stdin.read()
|
||
else:
|
||
raise click.UsageError("Must provide message via -m, -f, -e, or stdin")
|
||
|
||
# Load key if provided (from .pem file or QR code image)
|
||
rsa_key_data = None
|
||
rsa_key_from_qr = False
|
||
|
||
if key and key_qr:
|
||
raise click.UsageError("Cannot use both --key and --key-qr. Choose one.")
|
||
|
||
if key:
|
||
rsa_key_data = Path(key).read_bytes()
|
||
elif key_qr:
|
||
if not HAS_QR or not has_qr_read():
|
||
raise click.ClickException(
|
||
"QR code reading not available. Install: pip install pyzbar\n"
|
||
"Also requires system library: sudo apt-get install libzbar0"
|
||
)
|
||
key_pem = extract_key_from_qr_file(key_qr)
|
||
if not key_pem:
|
||
raise click.ClickException(f"Could not extract RSA key from QR code: {key_qr}")
|
||
rsa_key_data = key_pem.encode('utf-8')
|
||
rsa_key_from_qr = True
|
||
if not quiet:
|
||
click.echo(f"Loaded RSA key from QR code: {key_qr}")
|
||
|
||
# QR code keys are never password-protected
|
||
effective_key_password = None if rsa_key_from_qr else key_password
|
||
|
||
# Validate security factors
|
||
if not pin and not rsa_key_data:
|
||
raise click.UsageError("Must provide --pin or --key/--key-qr (or both)")
|
||
|
||
try:
|
||
ref_photo = Path(ref).read_bytes()
|
||
carrier_image = Path(carrier).read_bytes()
|
||
|
||
# Pre-check capacity with selected mode
|
||
fit_check = will_fit_by_mode(payload, carrier_image, embed_mode=embed_mode)
|
||
if not fit_check['fits']:
|
||
# Suggest alternative mode if it would fit
|
||
alt_mode = 'lsb' if embed_mode == 'dct' else 'dct'
|
||
alt_check = will_fit_by_mode(payload, carrier_image, embed_mode=alt_mode)
|
||
|
||
suggestion = ""
|
||
if alt_mode == 'lsb' and alt_check['fits']:
|
||
suggestion = f"\n Tip: Payload would fit in LSB mode (--mode lsb)"
|
||
|
||
raise click.ClickException(
|
||
f"Payload too large for {embed_mode.upper()} mode.\n"
|
||
f" Payload: {fit_check['payload_size']:,} bytes\n"
|
||
f" Capacity: {fit_check['capacity']:,} bytes\n"
|
||
f" Shortfall: {-fit_check['headroom']:,} bytes"
|
||
f"{suggestion}"
|
||
)
|
||
|
||
if not quiet:
|
||
mode_desc = embed_mode.upper()
|
||
if embed_mode == 'dct':
|
||
mode_desc += f" ({dct_color_mode}, {dct_output_format.upper()})"
|
||
click.echo(f"Mode: {mode_desc} ({fit_check['usage_percent']:.1f}% capacity)")
|
||
|
||
# Show channel status
|
||
channel_status = format_channel_status_line()
|
||
if resolved_channel_key == "":
|
||
click.echo("Channel: PUBLIC (no isolation)")
|
||
elif resolved_channel_key:
|
||
fingerprint = f"{resolved_channel_key[:4]}-••••-...-{resolved_channel_key[-4:]}"
|
||
click.echo(f"Channel: {fingerprint} (explicit)")
|
||
elif channel_status:
|
||
click.echo(channel_status)
|
||
|
||
# v4.0.0: Include channel_key parameter
|
||
result = encode(
|
||
message=payload,
|
||
reference_photo=ref_photo,
|
||
carrier_image=carrier_image,
|
||
passphrase=passphrase,
|
||
pin=pin or "",
|
||
rsa_key_data=rsa_key_data,
|
||
rsa_password=effective_key_password,
|
||
embed_mode=embed_mode,
|
||
dct_output_format=dct_output_format,
|
||
dct_color_mode=dct_color_mode,
|
||
channel_key=resolved_channel_key,
|
||
)
|
||
|
||
# Determine output path
|
||
if output:
|
||
out_path = Path(output)
|
||
else:
|
||
out_path = Path(result.filename)
|
||
|
||
# Write output
|
||
out_path.write_bytes(result.stego_image)
|
||
|
||
if not quiet:
|
||
click.secho(f"✓ Encoded successfully!", fg='green')
|
||
click.echo(f" Output: {out_path}")
|
||
click.echo(f" Size: {len(result.stego_image):,} bytes")
|
||
click.echo(f" Capacity used: {result.capacity_percent:.1f}%")
|
||
if embed_mode == 'dct':
|
||
color_note = "color preserved" if dct_color_mode == 'color' else "grayscale"
|
||
format_note = dct_output_format.upper()
|
||
click.secho(f" DCT output: {format_note} ({color_note})", dim=True)
|
||
|
||
except StegasooError as e:
|
||
raise click.ClickException(str(e))
|
||
except click.ClickException:
|
||
raise
|
||
except Exception as e:
|
||
raise click.ClickException(f"Error: {e}")
|
||
|
||
|
||
# ============================================================================
|
||
# DECODE COMMAND
|
||
# ============================================================================
|
||
|
||
@cli.command()
|
||
@click.option('--ref', '-r', required=True, type=click.Path(exists=True), help='Reference photo')
|
||
@click.option('--stego', '-s', required=True, type=click.Path(exists=True), help='Stego image')
|
||
@click.option('--passphrase', '-p', required=True, help='Passphrase')
|
||
@click.option('--pin', help='Static PIN')
|
||
@click.option('--key', '-k', type=click.Path(exists=True), help='RSA key file (.pem)')
|
||
@click.option('--key-qr', type=click.Path(exists=True), help='RSA key from QR code image')
|
||
@click.option('--key-password', help='RSA key password (for encrypted .pem files)')
|
||
@click.option('--channel', 'channel_key', help='Channel key (or "auto" for server config)')
|
||
@click.option('--channel-file', type=click.Path(exists=True), help='Read channel key from file')
|
||
@click.option('--no-channel', is_flag=True, help='Force public mode (no channel key)')
|
||
@click.option('--output', '-o', type=click.Path(), help='Save decoded content to file')
|
||
@click.option('--mode', 'embed_mode', type=click.Choice(['auto', 'lsb', 'dct']), default='auto',
|
||
help='Extraction mode: auto (default), lsb, or dct')
|
||
@click.option('--quiet', '-q', is_flag=True, help='Output only the content (for text) or suppress messages (for files)')
|
||
@click.option('--force', is_flag=True, help='Overwrite existing output file')
|
||
def decode_cmd(ref, stego, passphrase, pin, key, key_qr, key_password, channel_key, channel_file,
|
||
no_channel, output, embed_mode, quiet, force):
|
||
"""
|
||
Decode a secret message or file from a stego image.
|
||
|
||
Must use the same credentials that were used for encoding.
|
||
Automatically detects whether content is text or a file.
|
||
|
||
v4.0.0: Channel key support - must match what was used for encoding.
|
||
v3.2.0: No --date parameter needed! Just use your passphrase.
|
||
|
||
\b
|
||
Channel Key Options:
|
||
(no option) Use server-configured key (auto mode)
|
||
--channel KEY Use explicit channel key
|
||
--channel-file F Read channel key from file
|
||
--no-channel Force public mode (for images encoded without channel key)
|
||
|
||
\b
|
||
Examples:
|
||
# Decode with auto channel key
|
||
stegasoo decode -r photo.jpg -s stego.png -p "apple forest thunder" --pin 123456
|
||
|
||
# Decode with explicit channel key
|
||
stegasoo decode -r photo.jpg -s stego.png -p "words" --pin 123456 \\
|
||
--channel ABCD-1234-EFGH-5678-IJKL-9012-MNOP-3456
|
||
|
||
# Decode public image (no channel key was used)
|
||
stegasoo decode -r photo.jpg -s stego.png -p "words" --pin 123456 --no-channel
|
||
"""
|
||
# Check DCT mode availability
|
||
if embed_mode == 'dct' and not has_dct_support():
|
||
raise click.ClickException(
|
||
"DCT mode requires scipy. Install with: pip install scipy"
|
||
)
|
||
|
||
# Resolve channel key
|
||
try:
|
||
resolved_channel_key = resolve_channel_key_option(channel_key, channel_file, no_channel)
|
||
except click.ClickException:
|
||
raise
|
||
|
||
# Load key if provided (from .pem file or QR code image)
|
||
rsa_key_data = None
|
||
rsa_key_from_qr = False
|
||
|
||
if key and key_qr:
|
||
raise click.UsageError("Cannot use both --key and --key-qr. Choose one.")
|
||
|
||
if key:
|
||
rsa_key_data = Path(key).read_bytes()
|
||
elif key_qr:
|
||
if not HAS_QR or not has_qr_read():
|
||
raise click.ClickException(
|
||
"QR code reading not available. Install: pip install pyzbar\n"
|
||
"Also requires system library: sudo apt-get install libzbar0"
|
||
)
|
||
key_pem = extract_key_from_qr_file(key_qr)
|
||
if not key_pem:
|
||
raise click.ClickException(f"Could not extract RSA key from QR code: {key_qr}")
|
||
rsa_key_data = key_pem.encode('utf-8')
|
||
rsa_key_from_qr = True
|
||
if not quiet:
|
||
click.echo(f"Loaded RSA key from QR code: {key_qr}")
|
||
|
||
# QR code keys are never password-protected
|
||
effective_key_password = None if rsa_key_from_qr else key_password
|
||
|
||
# Validate security factors
|
||
if not pin and not rsa_key_data:
|
||
raise click.UsageError("Must provide --pin or --key/--key-qr (or both)")
|
||
|
||
try:
|
||
ref_photo = Path(ref).read_bytes()
|
||
stego_image = Path(stego).read_bytes()
|
||
|
||
# v4.0.0: Include channel_key parameter
|
||
result = decode(
|
||
stego_image=stego_image,
|
||
reference_photo=ref_photo,
|
||
passphrase=passphrase,
|
||
pin=pin or "",
|
||
rsa_key_data=rsa_key_data,
|
||
rsa_password=effective_key_password,
|
||
embed_mode=embed_mode,
|
||
channel_key=resolved_channel_key,
|
||
)
|
||
|
||
if result.is_file:
|
||
# File content
|
||
if output:
|
||
out_path = Path(output)
|
||
elif result.filename:
|
||
out_path = Path(result.filename)
|
||
else:
|
||
out_path = Path("decoded_file")
|
||
|
||
if out_path.exists() and not force:
|
||
raise click.ClickException(
|
||
f"Output file '{out_path}' exists. Use --force to overwrite."
|
||
)
|
||
|
||
out_path.write_bytes(result.file_data)
|
||
|
||
if not quiet:
|
||
click.secho("✓ Decoded file successfully!", fg='green')
|
||
click.echo(f" Saved to: {out_path}")
|
||
click.echo(f" Size: {len(result.file_data):,} bytes")
|
||
if result.mime_type:
|
||
click.echo(f" Type: {result.mime_type}")
|
||
else:
|
||
# Text content
|
||
if output:
|
||
Path(output).write_text(result.message)
|
||
if not quiet:
|
||
click.secho("✓ Decoded successfully!", fg='green')
|
||
click.echo(f" Saved to: {output}")
|
||
else:
|
||
if quiet:
|
||
click.echo(result.message)
|
||
else:
|
||
click.secho("✓ Decoded successfully!", fg='green')
|
||
click.echo()
|
||
click.echo(result.message)
|
||
|
||
except (DecryptionError, ExtractionError) as e:
|
||
# Provide helpful hints for channel key mismatches
|
||
error_msg = str(e)
|
||
if 'channel key' in error_msg.lower():
|
||
raise click.ClickException(error_msg)
|
||
raise click.ClickException(f"Decryption failed: {e}")
|
||
except StegasooError as e:
|
||
raise click.ClickException(str(e))
|
||
except Exception as e:
|
||
raise click.ClickException(f"Error: {e}")
|
||
|
||
|
||
# ============================================================================
|
||
# VERIFY COMMAND
|
||
# ============================================================================
|
||
|
||
@cli.command()
|
||
@click.option('--ref', '-r', required=True, type=click.Path(exists=True), help='Reference photo')
|
||
@click.option('--stego', '-s', required=True, type=click.Path(exists=True), help='Stego image')
|
||
@click.option('--passphrase', '-p', required=True, help='Passphrase')
|
||
@click.option('--pin', help='Static PIN')
|
||
@click.option('--key', '-k', type=click.Path(exists=True), help='RSA key file (.pem)')
|
||
@click.option('--key-qr', type=click.Path(exists=True), help='RSA key from QR code image')
|
||
@click.option('--key-password', help='RSA key password (for encrypted .pem files)')
|
||
@click.option('--channel', 'channel_key', help='Channel key (or "auto" for server config)')
|
||
@click.option('--channel-file', type=click.Path(exists=True), help='Read channel key from file')
|
||
@click.option('--no-channel', is_flag=True, help='Force public mode (no channel key)')
|
||
@click.option('--mode', 'embed_mode', type=click.Choice(['auto', 'lsb', 'dct']), default='auto',
|
||
help='Extraction mode: auto (default), lsb, or dct')
|
||
@click.option('--json', 'as_json', is_flag=True, help='Output as JSON')
|
||
def verify(ref, stego, passphrase, pin, key, key_qr, key_password, channel_key, channel_file,
|
||
no_channel, embed_mode, as_json):
|
||
"""
|
||
Verify that a stego image can be decoded without extracting the message.
|
||
|
||
Quick check to validate credentials are correct and data is intact.
|
||
Does NOT output the actual message content.
|
||
|
||
v4.0.0: Also verifies channel key matches.
|
||
|
||
\b
|
||
Examples:
|
||
stegasoo verify -r photo.jpg -s stego.png -p "my passphrase" --pin 123456
|
||
|
||
stegasoo verify -r photo.jpg -s stego.png -p "words here" -k mykey.pem --json
|
||
|
||
stegasoo verify -r photo.jpg -s stego.png -p "test phrase" --pin 123456 --no-channel
|
||
"""
|
||
# Check DCT mode availability
|
||
if embed_mode == 'dct' and not has_dct_support():
|
||
raise click.ClickException(
|
||
"DCT mode requires scipy. Install with: pip install scipy"
|
||
)
|
||
|
||
# Resolve channel key
|
||
try:
|
||
resolved_channel_key = resolve_channel_key_option(channel_key, channel_file, no_channel)
|
||
except click.ClickException:
|
||
raise
|
||
|
||
# Load key if provided
|
||
rsa_key_data = None
|
||
rsa_key_from_qr = False
|
||
|
||
if key and key_qr:
|
||
raise click.UsageError("Cannot use both --key and --key-qr. Choose one.")
|
||
|
||
if key:
|
||
rsa_key_data = Path(key).read_bytes()
|
||
elif key_qr:
|
||
if not HAS_QR or not has_qr_read():
|
||
raise click.ClickException(
|
||
"QR code reading not available. Install: pip install pyzbar\n"
|
||
"Also requires system library: sudo apt-get install libzbar0"
|
||
)
|
||
key_pem = extract_key_from_qr_file(key_qr)
|
||
if not key_pem:
|
||
raise click.ClickException(f"Could not extract RSA key from QR code: {key_qr}")
|
||
rsa_key_data = key_pem.encode('utf-8')
|
||
rsa_key_from_qr = True
|
||
|
||
effective_key_password = None if rsa_key_from_qr else key_password
|
||
|
||
if not pin and not rsa_key_data:
|
||
raise click.UsageError("Must provide --pin or --key/--key-qr (or both)")
|
||
|
||
try:
|
||
ref_photo = Path(ref).read_bytes()
|
||
stego_image = Path(stego).read_bytes()
|
||
|
||
# Attempt to decode (v4.0.0: with channel_key)
|
||
result = decode(
|
||
stego_image=stego_image,
|
||
reference_photo=ref_photo,
|
||
passphrase=passphrase,
|
||
pin=pin or "",
|
||
rsa_key_data=rsa_key_data,
|
||
rsa_password=effective_key_password,
|
||
embed_mode=embed_mode,
|
||
channel_key=resolved_channel_key,
|
||
)
|
||
|
||
# Calculate payload size
|
||
if result.is_file:
|
||
payload_size = len(result.file_data)
|
||
content_type = result.mime_type or 'file'
|
||
else:
|
||
payload_size = len(result.message.encode('utf-8'))
|
||
content_type = 'text'
|
||
|
||
if as_json:
|
||
import json
|
||
output = {
|
||
'valid': True,
|
||
'content_type': content_type,
|
||
'payload_size': payload_size,
|
||
'filename': result.filename if result.is_file else None,
|
||
}
|
||
click.echo(json.dumps(output, indent=2))
|
||
else:
|
||
click.secho("✓ Verification successful!", fg='green')
|
||
click.echo(f" Content type: {content_type}")
|
||
click.echo(f" Payload size: {payload_size:,} bytes")
|
||
if result.is_file and result.filename:
|
||
click.echo(f" Filename: {result.filename}")
|
||
|
||
except (DecryptionError, ExtractionError) as e:
|
||
if as_json:
|
||
import json
|
||
output = {
|
||
'valid': False,
|
||
'error': str(e),
|
||
}
|
||
click.echo(json.dumps(output, indent=2))
|
||
sys.exit(1)
|
||
else:
|
||
raise click.ClickException(f"Verification failed: {e}")
|
||
except StegasooError as e:
|
||
raise click.ClickException(str(e))
|
||
except Exception as e:
|
||
raise click.ClickException(f"Error: {e}")
|
||
|
||
|
||
# ============================================================================
|
||
# INFO COMMAND
|
||
# ============================================================================
|
||
|
||
@cli.command()
|
||
@click.argument('image', type=click.Path(exists=True))
|
||
@click.option('--json', 'as_json', is_flag=True, help='Output as JSON')
|
||
def info(image, as_json):
|
||
"""
|
||
Show information about an image file.
|
||
|
||
Displays dimensions, format, capacity estimates for different modes,
|
||
and whether the image appears suitable as a carrier.
|
||
|
||
\b
|
||
Examples:
|
||
stegasoo info photo.png
|
||
stegasoo info carrier.jpg --json
|
||
"""
|
||
try:
|
||
image_data = Path(image).read_bytes()
|
||
img_info = get_image_info(image_data)
|
||
|
||
if as_json:
|
||
import json
|
||
click.echo(json.dumps(img_info, indent=2))
|
||
return
|
||
|
||
click.echo()
|
||
click.secho(f"=== Image Info: {image} ===", fg='cyan', bold=True)
|
||
click.echo(f" Format: {img_info.get('format', 'Unknown')}")
|
||
click.echo(f" Dimensions: {img_info.get('width', '?')} × {img_info.get('height', '?')}")
|
||
click.echo(f" Mode: {img_info.get('mode', '?')}")
|
||
click.echo(f" Size: {len(image_data):,} bytes")
|
||
|
||
if 'lsb_capacity' in img_info:
|
||
click.echo()
|
||
click.secho(" Capacity Estimates:", fg='green')
|
||
click.echo(f" LSB mode: {img_info['lsb_capacity']:,} bytes")
|
||
if 'dct_capacity' in img_info:
|
||
click.echo(f" DCT mode: {img_info['dct_capacity']:,} bytes")
|
||
|
||
click.echo()
|
||
|
||
except Exception as e:
|
||
raise click.ClickException(str(e))
|
||
|
||
|
||
# ============================================================================
|
||
# COMPARE COMMAND
|
||
# ============================================================================
|
||
|
||
@cli.command()
|
||
@click.argument('image', type=click.Path(exists=True))
|
||
@click.option('--payload', '-p', type=click.Path(exists=True), help='Check if this file would fit')
|
||
@click.option('--size', '-s', type=int, help='Check if this many bytes would fit')
|
||
@click.option('--json', 'as_json', is_flag=True, help='Output as JSON')
|
||
def compare(image, payload, size, as_json):
|
||
"""
|
||
Compare embedding mode capacities for an image.
|
||
|
||
Shows LSB vs DCT capacity and helps choose the right mode.
|
||
Optionally checks if a specific payload would fit.
|
||
|
||
\b
|
||
Examples:
|
||
stegasoo compare carrier.png
|
||
stegasoo compare carrier.png --payload secret.pdf
|
||
stegasoo compare carrier.png --size 50000
|
||
"""
|
||
try:
|
||
image_data = Path(image).read_bytes()
|
||
|
||
# Get payload size if provided
|
||
payload_size = None
|
||
if payload:
|
||
payload_size = len(Path(payload).read_bytes())
|
||
elif size:
|
||
payload_size = size
|
||
|
||
comparison = compare_modes(image_data)
|
||
|
||
if as_json:
|
||
import json
|
||
output_data = {
|
||
"file": image,
|
||
"width": comparison['width'],
|
||
"height": comparison['height'],
|
||
"modes": {
|
||
"lsb": {
|
||
"capacity_bytes": comparison['lsb']['capacity_bytes'],
|
||
"capacity_kb": round(comparison['lsb']['capacity_kb'], 1),
|
||
"available": True,
|
||
"output_format": comparison['lsb']['output'],
|
||
},
|
||
"dct": {
|
||
"capacity_bytes": comparison['dct']['capacity_bytes'],
|
||
"capacity_kb": round(comparison['dct']['capacity_kb'], 1),
|
||
"available": comparison['dct']['available'],
|
||
"output_formats": ["png", "jpeg"],
|
||
"color_modes": ["grayscale", "color"],
|
||
"ratio_vs_lsb_percent": round(comparison['dct']['ratio_vs_lsb'], 1),
|
||
},
|
||
},
|
||
}
|
||
|
||
if payload_size:
|
||
output_data["payload_check"] = {
|
||
"size_bytes": payload_size,
|
||
"fits_lsb": payload_size <= comparison['lsb']['capacity_bytes'],
|
||
"fits_dct": payload_size <= comparison['dct']['capacity_bytes'],
|
||
}
|
||
|
||
click.echo(json.dumps(output_data, indent=2))
|
||
return
|
||
|
||
click.echo()
|
||
click.secho(f"=== Mode Comparison: {image} ===", fg='cyan', bold=True)
|
||
click.echo(f" Dimensions: {comparison['width']} × {comparison['height']}")
|
||
click.echo()
|
||
|
||
# LSB mode
|
||
click.secho(" ┌─── LSB Mode ───", fg='green')
|
||
click.echo(f" │ Capacity: {comparison['lsb']['capacity_bytes']:,} bytes ({comparison['lsb']['capacity_kb']:.1f} KB)")
|
||
click.echo(f" │ Output: {comparison['lsb']['output']}")
|
||
click.echo(f" │ Status: ✓ Available")
|
||
click.echo(" │")
|
||
|
||
# DCT mode
|
||
click.secho(" ├─── DCT Mode ───", fg='blue')
|
||
click.echo(f" │ Capacity: {comparison['dct']['capacity_bytes']:,} bytes ({comparison['dct']['capacity_kb']:.1f} KB)")
|
||
click.echo(f" │ Ratio: {comparison['dct']['ratio_vs_lsb']:.1f}% of LSB capacity")
|
||
if comparison['dct']['available']:
|
||
click.echo(f" │ Status: ✓ Available")
|
||
click.echo(f" │ Formats: PNG (lossless), JPEG (smaller)")
|
||
click.echo(f" │ Colors: Grayscale (default), Color")
|
||
else:
|
||
click.secho(f" │ Status: ✗ Requires scipy (pip install scipy)", fg='yellow')
|
||
click.echo(" │")
|
||
|
||
# Payload check
|
||
if payload_size:
|
||
click.secho(" ├─── Payload Check ───", fg='magenta')
|
||
click.echo(f" │ Size: {payload_size:,} bytes")
|
||
|
||
fits_lsb = payload_size <= comparison['lsb']['capacity_bytes']
|
||
fits_dct = payload_size <= comparison['dct']['capacity_bytes']
|
||
|
||
lsb_icon = "✓" if fits_lsb else "✗"
|
||
dct_icon = "✓" if fits_dct else "✗"
|
||
lsb_color = 'green' if fits_lsb else 'red'
|
||
dct_color = 'green' if fits_dct else 'red'
|
||
|
||
click.echo(f" │ LSB mode: ", nl=False)
|
||
click.secho(f"{lsb_icon} {'Fits' if fits_lsb else 'Too large'}", fg=lsb_color)
|
||
click.echo(f" │ DCT mode: ", nl=False)
|
||
click.secho(f"{dct_icon} {'Fits' if fits_dct else 'Too large'}", fg=dct_color)
|
||
click.echo(" │")
|
||
|
||
# Recommendation
|
||
click.secho(" └─── Recommendation ───", fg='yellow')
|
||
if not comparison['dct']['available']:
|
||
click.echo(" Use LSB mode (DCT unavailable)")
|
||
elif payload_size:
|
||
if fits_dct:
|
||
click.echo(" DCT mode for better stealth (payload fits both modes)")
|
||
click.echo(" Use --dct-color color to preserve original colors")
|
||
elif fits_lsb:
|
||
click.echo(" LSB mode (payload too large for DCT)")
|
||
else:
|
||
click.secho(" ✗ Payload too large for both modes!", fg='red')
|
||
else:
|
||
click.echo(" LSB for larger payloads, DCT for better stealth")
|
||
click.echo(" DCT supports color output with --dct-color color")
|
||
|
||
click.echo()
|
||
|
||
except Exception as e:
|
||
raise click.ClickException(str(e))
|
||
|
||
|
||
# ============================================================================
|
||
# STRIP-METADATA COMMAND
|
||
# ============================================================================
|
||
|
||
@cli.command('strip-metadata')
|
||
@click.argument('image', type=click.Path(exists=True))
|
||
@click.option('--output', '-o', type=click.Path(), help='Output file (default: overwrites input)')
|
||
@click.option('--format', '-f', 'output_format', type=click.Choice(['PNG', 'BMP']), default='PNG',
|
||
help='Output format')
|
||
@click.option('--quiet', '-q', is_flag=True, help='Suppress output')
|
||
def strip_metadata_cmd(image, output, output_format, quiet):
|
||
"""
|
||
Remove all metadata (EXIF, GPS, etc.) from an image.
|
||
|
||
Creates a clean image with only pixel data - no camera info,
|
||
location data, timestamps, or other potentially sensitive metadata.
|
||
|
||
\b
|
||
Examples:
|
||
stegasoo strip-metadata photo.jpg -o clean.png
|
||
stegasoo strip-metadata photo.jpg # Overwrites as PNG
|
||
"""
|
||
if not HAS_STRIP_METADATA:
|
||
raise click.ClickException("strip_image_metadata not available")
|
||
|
||
try:
|
||
image_data = Path(image).read_bytes()
|
||
original_size = len(image_data)
|
||
|
||
clean_data = strip_image_metadata(image_data, output_format)
|
||
|
||
if output:
|
||
out_path = Path(output)
|
||
else:
|
||
# Replace extension with output format
|
||
out_path = Path(image).with_suffix(f'.{output_format.lower()}')
|
||
|
||
out_path.write_bytes(clean_data)
|
||
|
||
if not quiet:
|
||
click.secho("✓ Metadata stripped", fg='green')
|
||
click.echo(f" Input: {image} ({original_size:,} bytes)")
|
||
click.echo(f" Output: {out_path} ({len(clean_data):,} bytes)")
|
||
|
||
except Exception as e:
|
||
raise click.ClickException(str(e))
|
||
|
||
|
||
# ============================================================================
|
||
# MODES COMMAND
|
||
# ============================================================================
|
||
|
||
@cli.command()
|
||
def modes():
|
||
"""
|
||
Show available embedding modes and their status.
|
||
|
||
Displays which modes are available and their characteristics.
|
||
"""
|
||
click.echo()
|
||
click.secho("=== Stegasoo Embedding Modes (v4.0.0) ===", fg='cyan', bold=True)
|
||
click.echo()
|
||
|
||
# LSB Mode
|
||
click.secho(" LSB Mode (Spatial LSB)", fg='green', bold=True)
|
||
click.echo(" Status: ✓ Always available")
|
||
click.echo(" Output: PNG/BMP (full color)")
|
||
click.echo(" Capacity: ~375 KB per megapixel")
|
||
click.echo(" Use case: Larger payloads, color preservation")
|
||
click.echo(" CLI flag: --mode lsb (default)")
|
||
click.echo()
|
||
|
||
# DCT Mode
|
||
click.secho(" DCT Mode (Frequency Domain)", fg='blue', bold=True)
|
||
if has_dct_support():
|
||
click.echo(" Status: ✓ Available")
|
||
else:
|
||
click.secho(" Status: ✗ Requires scipy", fg='yellow')
|
||
click.echo(" Install: pip install scipy")
|
||
click.echo(" Capacity: ~75 KB per megapixel (~20% of LSB)")
|
||
click.echo(" Use case: Better stealth, frequency domain hiding")
|
||
click.echo(" CLI flag: --mode dct")
|
||
click.echo()
|
||
|
||
# DCT Options
|
||
click.secho(" DCT Options", fg='magenta', bold=True)
|
||
click.echo(" Output format:")
|
||
click.echo(" --dct-format png Lossless, larger file (default)")
|
||
click.echo(" --dct-format jpeg Lossy, smaller, more natural")
|
||
click.echo()
|
||
click.echo(" Color mode:")
|
||
click.echo(" --dct-color grayscale Traditional DCT (default)")
|
||
click.echo(" --dct-color color Preserves original colors")
|
||
click.echo()
|
||
|
||
# Channel Key Status (v4.0.0)
|
||
click.secho(" Channel Key (v4.0.0)", fg='cyan', bold=True)
|
||
status = get_channel_status()
|
||
if status['mode'] == 'public':
|
||
click.echo(" Status: PUBLIC (no key configured)")
|
||
click.echo(" Effect: Messages readable by any installation")
|
||
else:
|
||
click.echo(" Status: PRIVATE")
|
||
click.echo(f" Fingerprint: {status['fingerprint']}")
|
||
click.echo(f" Source: {status['source']}")
|
||
click.echo(" Effect: Messages isolated to this channel")
|
||
click.echo()
|
||
click.echo(" CLI flags:")
|
||
click.echo(" --channel KEY Use explicit channel key")
|
||
click.echo(" --channel-file F Read key from file")
|
||
click.echo(" --no-channel Force public mode")
|
||
click.echo()
|
||
|
||
# v4.0.0 Changes
|
||
click.secho(" v4.0.0 Changes:", fg='cyan', bold=True)
|
||
click.echo(" ✓ Channel key support for deployment isolation")
|
||
click.echo(" ✓ New `stegasoo channel` command group")
|
||
click.echo(" ✓ Messages encoded with channel key require same key to decode")
|
||
click.echo()
|
||
|
||
# Examples
|
||
click.secho(" Examples:", dim=True)
|
||
click.echo(" # Generate channel key")
|
||
click.echo(" stegasoo channel generate --save")
|
||
click.echo()
|
||
click.echo(" # Encode with channel isolation")
|
||
click.echo(" stegasoo encode ... --channel XXXX-XXXX-...")
|
||
click.echo()
|
||
click.echo(" # Decode public message (no channel key)")
|
||
click.echo(" stegasoo decode ... --no-channel")
|
||
click.echo()
|
||
|
||
|
||
# ============================================================================
|
||
# MAIN
|
||
# ============================================================================
|
||
|
||
def main():
|
||
"""Entry point."""
|
||
cli()
|
||
|
||
|
||
if __name__ == '__main__':
|
||
main()
|