(mozilla-projects-nss-nss-3-12-6-release-notes)=

# NSS 3.12.6 release notes

(nss-3-12-6-release-notes-1)=

## [NSS 3.12.6 release notes](#nss_3.12.6_release_notes)

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2010-03-03
*Newsgroup:*[mozilla.dev.tech.crypto](news://news.mozilla.org/mozilla.dev.tech.crypto)

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:name: section_1

```{rubric} Introduction
```

Network Security Services (NSS) 3.12.6 is a patch release for NSS 3.12. The bug fixes in
NSS 3.12.6 are described in the "[Bugs
Fixed](http://mdn.beonex.com/en/NSS_3.12.6_release_notes.html#bugsfixed)" section below.

NSS 3.12.6 is tri-licensed under the MPL 1.1/GPL 2.0/LGPL 2.1.
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```{rubric} Distribution Information
```

The CVS tag for the NSS 3.12.6 release is

`NSS_3_12_6_RTM`

. NSS 3.12.6 requires

[NSPR
4.8.4](https://www.mozilla.org/projects/nspr/release-notes/)

.

See the

[Documentation](http://mdn.beonex.com/en/NSS_3.12.6_release_notes.html#docs)

section for the build instructions.

NSS 3.12.6 source and binary distributions are also available on `ftp.mozilla.org` for
secure HTTPS download:

- Source tarballs:
  <https://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_12_6_RTM/src/>.

You also need to download the NSPR 4.8.4 binary distributions to get the NSPR 4.8.4
header files and shared libraries, which NSS 3.12.6 requires. NSPR 4.8.4 binary
distributions are in

<https://ftp.mozilla.org/pub/mozilla.org/nspr/releases/v4.8.4/>

.
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```{rubric} New in NSS 3.12.6
:name: New_in_NSS_3.12.6
```

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```{rubric} SSL3 & TLS Renegotiation Indication Extension (RFC 5746)
:name: SSL3_TLS_Renegotiation_Indication_Extension_(RFC_5746)
```

- By default, NSS 3.12.6 uses the new TLS Renegotiation Indication Extension for TLS
  renegotiation but allows simple SSL/TLS connections (without renegotiation) with
  peers that don't support the TLS Renegotiation Indication Extension.

  The behavior of NSS for renegotiation can be changed through API function calls, or
  with the following environment variables:

  - NSS_SSL_ENABLE_RENEGOTIATION

    - values:

      - \[0|n|N\]: SSL_RENEGOTIATE_NEVER

        - Never allow renegotiation - That was the default for 3.12.5 release.

      - \[1|u|U\]: SSL_RENEGOTIATE_UNRESTRICTED

        - Server and client are allowed to renegotiate without any restrictions.
          This setting was the default prior 3.12.5 and makes products vulnerable.

      - \[2|r|R\]: SSL_RENEGOTIATE_REQUIRES_XTN (default)

        - Only allows renegotiation if the peer's hello bears the TLS
          renegotiation_info extension. This is the safe renegotiation.

      - \[3|t|T\]: SSL_RENEGOTIATE_TRANSITIONAL

        - Disallows unsafe renegotiation in server sockets only, but allows clients
          to continue to renegotiate with vulnerable servers. This value should
          only be used during the transition period when few servers have been
          upgraded.

  - NSS_SSL_REQUIRE_SAFE_NEGOTIATION

    - values:

      - 1: requireSafeNegotiation = TRUE
      - unset: requireSafeNegotiation = FALSE

      Controls whether safe renegotiation indication is required for initial
      handshake. If TRUE, a connection will be dropped at initial handshake if the
      peer server or client does not support safe renegotiation. The default setting
      for this option is FALSE.

  These options can also be set with the following SSL options:

  - sslOptions.enableRenegotiation
  - sslOptions.requireSafeNegotiation
  - New pseudo cipher suite value: TLS_EMPTY_RENEGOTIATION_INFO_SCSV (cannot be
    negotiated)
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```{rubric} TLS Server Name Indication for servers
:name: TLS_Server_Name_Indication_for_servers
```

- TLS Server Name Indication (SNI) for servers is almost fully implemented in NSS
  3.12.6.

  See

  [bug 360421](https://bugzilla.mozilla.org/show_bug.cgi?id=360421)

   for
  details.

  Note: The TLS Server Name Indication for clients is already fully implemented in NSS.

  - New functions for SNI *(see ssl.h for more information)*:

    - SSLSNISocketConfig

      - Return values:

        - SSL_SNI_CURRENT_CONFIG_IS_USED: libSSL must use the default cert and key.
        - SSL_SNI_SEND_ALERT: libSSL must send the "unrecognized_name" alert.

    - SSL_SNISocketConfigHook

    - SSL_ReconfigFD

    - SSL_ConfigServerSessionIDCacheWithOpt

    - SSL_SetTrustAnchors

    - SSL_GetNegotiatedHostInfo

  - New enum for SNI:

    - SSLSniNameType *(see sslt.h)*
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```{rubric} New functions
```

- *in cert.h*

  - CERTDistNames: Duplicate distinguished name array.
  - CERT_DistNamesFromCertList: Generate an array of Distinguished names from a list
    of certs.

  *in ocsp.h*

  - CERT_CacheOCSPResponseFromSideChannel:

    - This function is intended for use when OCSP responses are provided via a
      side-channel, i.e. TLS OCSP stapling (a.k.a. the status_request extension).

  *in ssl.h*

  - SSL_GetImplementedCiphers
  - SSL_GetNumImplementedCiphers
  - SSL_HandshakeNegotiatedExtension
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```{rubric} New error codes
```

- *in sslerr.h*

  - SSL_ERROR_UNSAFE_NEGOTIATION
  - SSL_ERROR_RX_UNEXPECTED_UNCOMPRESSED_RECORD
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```{rubric} New types
```

- *in sslt.h*

  - SSLExtensionType
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```{rubric} New environment variables
:name: New_environment_variables
```

- SQLITE_FORCE_PROXY_LOCKING

  - 1 means force always use proxy, 0 means never use proxy, NULL means use proxy for
    non-local files only.

- SSLKEYLOGFILE

  - Key log file. If set, NSS logs RSA pre-master secrets to this file. This allows
    packet sniffers to decrypt TLS connections.
    See [documentation](http://mdn.beonex.com/en/NSS_Key_Log_Format.html).
    Note: The code must be built with TRACE defined to use this functionality.
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```{rubric} Bugs Fixed
```

The following bugs have been fixed in NSS 3.12.6.

- [Bug 275744](https://bugzilla.mozilla.org/show_bug.cgi?id=275744): Support for TLS
  compression RFC 3749
- [Bug 494603](https://bugzilla.mozilla.org/show_bug.cgi?id=494603): Update NSS's copy
  of sqlite3 to 3.6.22 to get numerous bug fixes
- [Bug 496993](https://bugzilla.mozilla.org/show_bug.cgi?id=496993): Add accessor
  functions for SSL_ImplementedCiphers
- [Bug 515279](https://bugzilla.mozilla.org/show_bug.cgi?id=515279):
  CERT_PKIXVerifyCert considers a certificate revoked if cert_ProcessOCSPResponse fails
  for any reason
- [Bug 515870](https://bugzilla.mozilla.org/show_bug.cgi?id=515870): GCC compiler
  warnings in NSS 3.12.4
- [Bug 518255](https://bugzilla.mozilla.org/show_bug.cgi?id=518255): The input buffer
  for SGN_Update should be declared const
- [Bug 519550](https://bugzilla.mozilla.org/show_bug.cgi?id=519550): Allow the
  specification of an alternate library for SQLite
- [Bug 524167](https://bugzilla.mozilla.org/show_bug.cgi?id=524167): Crash in \[[@
  find_objects_by_template - nssToken_FindCertificateByIssuerAndSerialNumber]
- [Bug 526910](https://bugzilla.mozilla.org/show_bug.cgi?id=526910): maxResponseLength
  (initialized to PKIX_DEFAULT_MAX_RESPONSE_LENGTH) is too small for downloading some
  CRLs.
- [Bug 527759](https://bugzilla.mozilla.org/show_bug.cgi?id=527759): Add multiple roots
  to NSS (single patch)
- [Bug 528741](https://bugzilla.mozilla.org/show_bug.cgi?id=528741): pkix_hash throws a
  null-argument exception on empty strings
- [Bug 530907](https://bugzilla.mozilla.org/show_bug.cgi?id=530907): The peerID
  argument to SSL_SetSockPeerID should be declared const
- [Bug 531188](https://bugzilla.mozilla.org/show_bug.cgi?id=531188): Decompression
  failure with <https://livechat.merlin.pl/>
- [Bug 532417](https://bugzilla.mozilla.org/show_bug.cgi?id=532417): Build problem with
  spaces in path names
- [Bug 534943](https://bugzilla.mozilla.org/show_bug.cgi?id=534943): Clean up the
  makefiles in lib/ckfw/builtins
- [Bug 534945](https://bugzilla.mozilla.org/show_bug.cgi?id=534945): lib/dev does not
  need to include headers from lib/ckfw
- [Bug 535669](https://bugzilla.mozilla.org/show_bug.cgi?id=535669): Move common
  makefile code in if and else to the outside
- [Bug 536023](https://bugzilla.mozilla.org/show_bug.cgi?id=536023): DER_UTCTimeToTime
  and DER_GeneralizedTimeToTime ignore all bytes after an embedded null
- [Bug 536474](https://bugzilla.mozilla.org/show_bug.cgi?id=536474): Add support for
  logging pre-master secrets
- [Bug 537356](https://bugzilla.mozilla.org/show_bug.cgi?id=537356): Implement new safe
  SSL3 & TLS renegotiation
- [Bug 537795](https://bugzilla.mozilla.org/show_bug.cgi?id=537795): NSS_InitContext
  does not work with NSS_RegisterShutdown
- [Bug 537829](https://bugzilla.mozilla.org/show_bug.cgi?id=537829): Allow NSS to build
  for Android
- [Bug 540304](https://bugzilla.mozilla.org/show_bug.cgi?id=540304): Implement
  SSL_HandshakeNegotiatedExtension
- [Bug 541228](https://bugzilla.mozilla.org/show_bug.cgi?id=541228): Remove an obsolete
  NSPR version check in lib/util/secport.c
- [Bug 541231](https://bugzilla.mozilla.org/show_bug.cgi?id=541231): nssinit.c doesn't
  need to include ssl.h and sslproto.h.
- [Bug 542538](https://bugzilla.mozilla.org/show_bug.cgi?id=542538): NSS: Add function
  for recording OCSP stapled replies
- [Bug 544191](https://bugzilla.mozilla.org/show_bug.cgi?id=544191): Use system zlib on
  Mac OS X
- [Bug 544584](https://bugzilla.mozilla.org/show_bug.cgi?id=544584): segmentation fault
  when enumerating the nss database
- [Bug 544586](https://bugzilla.mozilla.org/show_bug.cgi?id=544586): Various
  nss-sys-init patches from Fedora
- [Bug 545273](https://bugzilla.mozilla.org/show_bug.cgi?id=545273): Remove unused
  function SEC_Init
- [Bug 546389](https://bugzilla.mozilla.org/show_bug.cgi?id=546389): nsssysinit binary
  built inside source tree
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```{rubric} Documentation
```

For a list of the primary NSS documentation pages on mozilla.org, see [NSS
Documentation](https://www.mozilla.org/projects/security/pki/nss/#documentation). New
and revised documents available since the release of NSS 3.11 include the following:

- [Build
  Instructions](http://mdn.beonex.com/en/NSS_reference/Building_and_installing_NSS/Build_instructions.html)
- [NSS Shared DB](http://wiki.mozilla.org/NSS_Shared_DB)
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```{rubric} Compatibility
```

NSS 3.12.6 shared libraries are backward compatible with all older NSS 3.x shared
libraries. A program linked with older NSS 3.x shared libraries will work with NSS 3.12.6
shared libraries without recompiling or relinking. Furthermore, applications that restrict
their use of NSS APIs to the functions listed in [NSS Public
Functions](https://www.mozilla.org/projects/security/pki/nss/ref/nssfunctions.html) will
remain compatible with future versions of the NSS shared libraries.
:::

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```{rubric} Feedback
```

Bugs discovered should be reported by filing a bug report with [mozilla.org
Bugzilla](https://bugzilla.mozilla.org/) (product NSS).
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