SodiumKdfContextLengthMismatch

error native on by default PHP ≥ 7.2

Group: Security

Identify sodium_crypto_kdf_derive_from_key whose context has known byte length other than SODIUM_CRYPTO_KDF_CONTEXTBYTES, eight.

Detection

• Report sodium_crypto_kdf_derive_from_key whose context has known byte length other than SODIUM_CRYPTO_KDF_CONTEXTBYTES, eight.
• Resolve builtin functions, classes, constants and methods, including imports and supported named arguments. Follow only bounded local facts within one lexical scope. Receiver and argument provenance must establish the specific API contract; variable names and comments never prove intent.
• Report one finding per violating operation. A reachable path, unchanged value identity and applicable API behavior are required. Intervening mutation, unknown calls involving tracked values, escaped aliases or exhausted analysis budgets invalidate proof.

Exceptions (no report)

• Exclude unresolved required symbols, user-defined lookalikes, incomplete syntax, unknown required values and unsupported versions.
• Both @custos-ignore SodiumKdfContextLengthMismatch and @noinspection SodiumKdfContextLengthMismatch suppress this native rule.

Fix

None. A repair requires a semantic decision or application error-handling policy.

PHP versions

Requires PHP 7.2 or later. Do not apply extension contracts when the resolved API is unavailable. Gate syntax and version-specific behavior to the configured target.

Configure

In custos.json:

{
  "rules": {
    "SodiumKdfContextLengthMismatch": {
      "enabled": false
    }
  }
}

Suppress

Before the statement or declaration (or the first statement of the file):

// @custos-ignore SodiumKdfContextLengthMismatch