Function FuzzECDHFromKey

nhp/test/fuzz_test.go:11–38

FuzzECDHFromKey tests ECDH key creation with random inputs. This is important for security as malformed keys should be handled gracefully.

(f *testing.F)

// FuzzECDHFromKey tests ECDH key creation with random inputs.
// This is important for security as malformed keys should be handled gracefully.
func FuzzECDHFromKey(f *testing.F) {
	// Seed corpus with valid key sizes
	f.Add([]byte{}, int(core.ECC_CURVE25519))
	f.Add(make([]byte, 32), int(core.ECC_CURVE25519))
	f.Add(make([]byte, 64), int(core.ECC_SM2))
	f.Add(make([]byte, 16), int(core.ECC_CURVE25519))
	f.Add(make([]byte, 48), int(core.ECC_SM2))

	f.Fuzz(func(t *testing.T, data []byte, eccType int) {
		// Normalize eccType to valid range
		var eType core.EccTypeEnum
		switch eccType % 2 {
		case 0:
			eType = core.ECC_CURVE25519
		case 1:
			eType = core.ECC_SM2
		}

		// ECDHFromKey should not panic on any input
		// It should return nil for invalid keys
		e := core.ECDHFromKey(eType, data)
		if e != nil {
			// If key was accepted, verify basic operations don't panic
			_ = e.PublicKey()
			_ = e.PublicKeyBase64()
		}
	})
}

// FuzzAESDecrypt tests AES decryption with random inputs.
// Ensures malformed ciphertext is handled without panics.