Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys)
Caveat: When operated in FIPS mode with Windows 7 Winload OS Loader (winload.exe) validated to FIPS 140-2 under Cert. #1326 operating in FIPS mode
Certificate
| Certificate number | 1328 |
|---|---|
| Standard | FIPS 140-2 |
| Status | historical |
| Overall level | 1 |
| Module type | Software |
| Embodiment | Multi-chip standalone |
| Vendor | Microsoft Corporation · website |
| Software versions | 6.1.7600.16385, 6.1.7600.16915, 6.1.7600.21092, 6.1.7601.17514, 6.1.7601.17919, 6.1.7601.17725, 6.1.7601.21861 and 6.1.7601.22076 |
Module description
CNG.SYS runs as a kernel mode export driver, and provides cryptographic services, through their documented interfaces, to Windows 7 kernel components. It supports several cryptographic algorithms accessible via a FIPS function table request irp (I/O request packet).
Approved algorithms
| Algorithm | CAVP certificate |
|---|---|
| AES | 1168, 1178 |
| AES GCM | 1168 |
| AES GMAC | 1168 |
| DRBG | 23, 24 |
| ECDSA | 141 |
| HMAC | 677 |
| KAS | vendor affirmed |
| RNG | 649 |
| RSA | 559, 560 |
| SHS | 1081 |
| Triple-DES | 846 |
Other algorithms
AES (Cert. #1168, key wrapping; key establishment methodology provides between 128 and 256 bits of encryption strength); DES; Diffie-Hellman (key agreement; key establishment methodology provides between 112 and 150 bits of encryption strength; non-compliant less than 112 bits of encryption strength); MD2; MD4; MD5; HMAC MD5; RC2; RC4
Tested configurations
- Microsoft Windows 7 Ultimate Edition (x64 version)
- Microsoft Windows 7 Ultimate Edition (x86 Version)
- Microsoft Windows 7 Ultimate Edition SP1 (x64 version) (single-user mode)
- Microsoft Windows 7 Ultimate Edition SP1 (x86 version)
Validation history
| Date | Type | Lab |
|---|---|---|
| 2010-08-12 | Initial | SAIC-VA |
| 2011-06-01 | Update | SAIC-VA |
| 2012-02-09 | Update | SAIC-VA |
| 2013-01-24 | Update |
Status timeline
As observed by this tracker's snapshots. NIST publishes no dates for list moves; observation began 2026-08-21, so earlier changes carry no date.
- 2026-08-21: first observed by this tracker, status historical
- Validation dates on record: 2010-08-12, 2011-06-01, 2012-02-09, 2013-01-24