openssl-encrypt has visible password in process list via --password CLI argument

Summary

Passwords passed via the --password / -p CLI argument in openssl_encrypt/modules/crypt_cli_subparser.py at lines 150-154 are visible to any user on the system via ps aux or /proc/[pid]/cmdline.

Affected Code

subparser.add_argument(
    "--password", "-p",
    help="Password (will prompt if not provided, or use CRYPT_PASSWORD environment variable)",
)

Similarly, --keystore-password exposes the keystore password.

Impact

On multi-user systems, any user can observe the encryption password by listing processes. The CRYPT_PASSWORD environment variable alternative is also visible via /proc/[pid]/environ (though with slightly restricted access).

Recommended Fix

• Document the security implications prominently
• Recommend interactive prompting (already supported) as the secure default
• Consider supporting password file descriptors (--password-fd) or reading from stdin
• Consider marking the argument as deprecated in favor of interactive prompting

Fix

Fixed in commit e78a366 on branch releases/1.4.x — added --password-file and --password-fd arguments; added OPENSSL_ENCRYPT_PASSWORD env var support; --password now emits deprecation warning.