This tool performs local Rijndael encryption/decryption with variable block and key sizes, useful for compatibility scenarios beyond standard AES settings.

Key Features

• 128/192/256-bit block size support
• 128/192/256-bit key size support
• CBC, ECB, CFB, OFB, CTR, and RAW modes
• Multiple input/output formats and padding options

Steps

1. Select encrypt or decrypt.
2. Configure block size, key size, mode, and padding.
3. Provide key and IV (IV depends on selected mode).
4. Process data and copy the result.

Notes

• AES is a standardized subset of Rijndael with fixed 128-bit block size.
• Non-standard block sizes require matching support on both sides.
• Keep all parameters identical for reproducible results.