SAP CODVN F/G (PASSCODE) Hash

What is SAP CODVN F/G (PASSCODE)?

The **SAP CODVN F/G (PASSCODE)** hash format is a proprietary cryptographic hash derived from SAP’s legacy authentication system, originally introduced in the 1990s as part of its early client-server architecture for SAP R/3 and subsequent ERP systems. Structurally, it combines a **one-way hash function** (typically MD5 or SHA-1, though SAP’s internal implementations often deviate from standard specifications) with a **fixed-length output** of 128 bits (16 bytes), encoded in a hexadecimal string of 32 characters. The format is not a standalone algorithm but rather a **customized SAP-specific variant** of password storage, where the "PASSCODE" refers to the hashed representation of user credentials after being processed through SAP’s **CODVN (Code Variation)** module. This module applies a non-standard transformation—including bitwise operations, XOR masks, or concatenation of salted components—to the plaintext password before hashing, resulting in a **deterministic but non-reversible** output. Its primary use-case was to securely store user credentials in SAP databases (e.g., `USR02` table) while enabling efficient authentication via **SAP’s proprietary login protocol**, though it lacks modern cryptographic best practices like salting or key stretching.

The **SAP CODVN F/G** format is critically vulnerable to cracking due to its **lack of fundamental cryptographic safeguards** and **optimized attack surfaces**. First, it often **repeatedly uses weak hashing primitives** (e.g., MD5 or SHA-1) without salting, making it susceptible to **rainbow table attacks**—precomputed hashes of common passwords can be matched in near-constant time. Second, the **fixed-length output** and **predictable transformation logic** (e.g., hardcoded XOR masks or offset-based operations) enable **dictionary attacks** and **brute-force optimizations**, as modern GPUs/ASICs can evaluate millions of hashes per second. Third, SAP’s **internal documentation leaks** (e.g., from older SAP Notes or reverse-engineered binaries) expose the **exact hashing parameters**, allowing attackers to **precompute hash chains** or implement **custom cracking tools** tailored to the CODVN variant. Finally, the **lack of iterative hashing** (e.g., no bcrypt/PBKDF2-style key stretching) means that even if a salt were present, the hash could be computed in **parallel across thousands of cores**, rendering it effectively **trivial to break** with sufficient computational resources.

Identifying SAP CODVN F/G (PASSCODE) Hashes

Identifying a hash blindly is often difficult because multiple algorithms can output strings of the exact same length. For example, a standard 32-character hexadecimal string could be MD5, NTLM, MD4, or LM. To definitively identify SAP CODVN F/G (PASSCODE), security researchers analyze the hash against a strict regular expression (regex) signature (shown above) to find structural matches.

How to Crack SAP CODVN F/G (PASSCODE)

If you need to recover the plaintext password for a SAP CODVN F/G (PASSCODE) hash during a penetration test or forensics investigation, you must supply the correct module ID to your cracking software. Use the exact commands provided at the top of this page to target the hash successfully.