Security/Server Side TLS: Difference between revisions

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Security/Server Side TLS (view source)

Revision as of 22:05, 23 December 2016

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For services that don't need backward compatibility, the parameters below provide a higher level of security. This configuration is compatible with Firefox 27, Chrome 30, IE 11 on Windows 7, Edge, Opera 17, Safari 9, Android 5.0, and Java 8.
For services that don't need backward compatibility, the parameters below provide a higher level of security. This configuration is compatible with Firefox 27, Chrome 30, IE 11 on Windows 7, Edge, Opera 17, Safari 9, Android 5.0, and Java 8.


* Ciphersuites: '''ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256'''
* Ciphersuites: '''ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256'''
* Versions: '''TLSv1.3 (working in progress), TLSv1.2'''
* Versions: '''TLSv1.2'''
* ECDH curves: '''X25519 (with OpenSSL 1.1.0+), prime256v1, secp521r1, secp384r1'''
* TLS curves: '''prime256v1, secp384r1, secp521r1'''
* Certificate type: '''ECDSA (recommended) or RSA'''
* Certificate type: '''ECDSA'''
* Certificate (ECDSA) curve: '''prime256v1, secp384r1, secp521r1'''
* Certificate curve: '''prime256v1, secp384r1, secp521r1'''
* Certificate signature: '''sha256WithRSAEncryption, ecdsa-with-SHA256, ecdsa-with-SHA384, ecdsa-with-SHA512'''
* Certificate signature: '''sha256WithRSAEncryption, ecdsa-with-SHA256, ecdsa-with-SHA384, ecdsa-with-SHA512'''
* RSA key size: '''2048''' (if not ECDSA)
* RSA key size: '''2048''' (if not ecdsa)
* DH Parameter size: '''N/A''' (disabled entirely)
* DH Parameter size: '''None''' (disabled entirely)
* ECDH Parameter size: '''256'''
* HSTS: '''max-age=15768000'''
* HSTS: '''max-age=15768000'''
* Certificate switching: '''None'''


<source>
<source>
          0xCC,0xA9 - ECDHE-ECDSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
0xC0,0x2C  - ECDHE-ECDSA-AES256-GCM-SHA384  TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256)   Mac=AEAD
          0xCC,0xA8 - ECDHE-RSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=RSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
0xC0,0x30  - ECDHE-RSA-AES256-GCM-SHA384    TLSv1.2 Kx=ECDH Au=RSA   Enc=AESGCM(256)   Mac=AEAD
          0xC0,0x2C - ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(256) Mac=AEAD
0xCC,0x14  - ECDHE-ECDSA-CHACHA20-POLY1305  TLSv1.2 Kx=ECDH Au=ECDSA Enc=ChaCha20(256) Mac=AEAD
          0xC0,0x30 - ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=RSA Enc=AESGCM(256) Mac=AEAD
0xCC,0x13  - ECDHE-RSA-CHACHA20-POLY1305    TLSv1.2 Kx=ECDH Au=RSA   Enc=ChaCha20(256) Mac=AEAD
          0xC0,0x2B - ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(128) Mac=AEAD
0xC0,0x2B - ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(128)   Mac=AEAD
          0xC0,0x2F - ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=RSA Enc=AESGCM(128) Mac=AEAD
0xC0,0x2F - ECDHE-RSA-AES128-GCM-SHA256   TLSv1.2 Kx=ECDH Au=RSA   Enc=AESGCM(128)   Mac=AEAD
          0xC0,0x24 - ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AES(256) Mac=SHA384
0xC0,0x24 - ECDHE-ECDSA-AES256-SHA384     TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(256)       Mac=SHA384
          0xC0,0x28 - ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH     Au=RSA Enc=AES(256) Mac=SHA384
0xC0,0x28 - ECDHE-RSA-AES256-SHA384       TLSv1.2 Kx=ECDH Au=RSA   Enc=AES(256)       Mac=SHA384
          0xC0,0x23 - ECDHE-ECDSA-AES128-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AES(128) Mac=SHA256
0xC0,0x23 - ECDHE-ECDSA-AES128-SHA256     TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(128)       Mac=SHA256
          0xC0,0x27 - ECDHE-RSA-AES128-SHA256 TLSv1.2 Kx=ECDH     Au=RSA Enc=AES(128) Mac=SHA256
0xC0,0x27 - ECDHE-RSA-AES128-SHA256       TLSv1.2 Kx=ECDH Au=RSA   Enc=AES(128)       Mac=SHA256
</source>
</source>


Rationale:
Rationale:
* ChaCha20 > AES_256_GCM > AES_128_GCM > AES_256_CBC > AES_128_CBC because AES_GCM is fragile ([https://eprint.iacr.org/2013/157.pdf 1]) and hard to implement safely. Also, ChaCha20 is not necessarily slower than AES_256_GCM while providing 256 bits of security.
* AES256-GCM is prioritized above its 128 bits variant, and ChaCha20 because we assume that most modern devices support AESNI instructions and thus benefit from fast and constant time AES.  
* We recommend ECDSA certificates with NIST-P256 as other curves may not be supported everywhere. RSA signatures on ECDSA certificates are permitted because very few CAs sign with ECDSA at the moment.
* We recommend ECDSA certificates with P256 as other curves may not be supported everywhere. RSA signatures on ECDSA certificates are permitted because very few CAs sign with ECDSA at the moment.
* DHE is removed entirely because it is slow in comparison with ECDHE, and all modern clients support elliptic curve key exchanges.
* DHE is removed entirely because it is slow in comparison with ECDHE, and all modern clients support elliptic curve key exchanges.
* HMAC-SHA1 is removed in favor of HMAC-SHA384 for AES256 and HMAC-SHA256 for AES128.
* SHA1 signature algorithm is removed in favor of SHA384 for AES256 and SHA256 for AES128.


== <span style="color:orange;">'''Intermediate'''</span> compatibility (default) ==
== <span style="color:orange;">'''Intermediate'''</span> compatibility (default) ==
For services that don't need compatibility with legacy clients (mostly WinXP), but still need to support a wide range of clients, this configuration is recommended. It is is compatible with Firefox 1, Chrome 1, IE 7, Opera 5 and Safari 1.
For services that don't need compatibility with legacy clients (mostly WinXP), but still need to support a wide range of clients, this configuration is recommended. It is is compatible with Firefox 1, Chrome 1, IE 7, Opera 5 and Safari 1.


* Ciphersuites: '''ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA256:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA:AES256-SHA:AES128-SHA256:AES256-SHA256:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:DES-CBC3-SHA'''
* Ciphersuites: '''ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS'''
* Versions: '''TLSv1.3 (working in progress), TLSv1.2, TLSv1.1, TLSv1'''
* Versions: '''TLSv1.2, TLSv1.1, TLSv1'''
* ECDH curves: '''X25519 (with OpenSSL 1.1.0+), prime256v1, secp521r1, secp384r1'''
* TLS curves: '''prime256v1, secp384r1, secp521r1'''
* Certificate type: '''RSA and ECDSA in parallel if available, otherwise just RSA'''
* Certificate type: '''RSA'''
* Certificate (ECDSA) curve: '''prime256v1, secp384r1, secp521r1'''
* Certificate curve: ''''None'''
* Certificate signature: '''sha256WithRSAEncryption for RSA, and ecdsa-with-SHA256, ecdsa-with-SHA384, ecdsa-with-SHA512 for ECDSA'''
* Certificate signature: '''sha256WithRSAEncryption'''
* RSA key size: '''2048'''
* RSA key size: '''2048'''
* DH Parameter size: '''2048'''
* DH Parameter size: '''2048'''
* ECDH Parameter size: '''256'''
* HSTS: '''max-age=15768000'''
* HSTS: '''max-age=15768000'''
* Certificate switching: '''None'''


<source>
<source>
          0xCC,0xA9 - ECDHE-ECDSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
0xCC,0x14  - ECDHE-ECDSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH Au=ECDSA Enc=ChaCha20(256) Mac=AEAD
          0xCC,0xA8 - ECDHE-RSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=RSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
0xCC,0x13  - ECDHE-RSA-CHACHA20-POLY1305   TLSv1.2 Kx=ECDH Au=RSA   Enc=ChaCha20(256) Mac=AEAD
          0xC0,0x2B - ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(128) Mac=AEAD
0xC0,0x2B - ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(128)   Mac=AEAD
          0xC0,0x2F - ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=RSA Enc=AESGCM(128) Mac=AEAD
0xC0,0x2F - ECDHE-RSA-AES128-GCM-SHA256   TLSv1.2 Kx=ECDH Au=RSA   Enc=AESGCM(128)   Mac=AEAD
          0xC0,0x2C - ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(256) Mac=AEAD
0xC0,0x2C - ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256)   Mac=AEAD
          0xC0,0x30 - ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=RSA Enc=AESGCM(256) Mac=AEAD
0xC0,0x30 - ECDHE-RSA-AES256-GCM-SHA384   TLSv1.2 Kx=ECDH Au=RSA   Enc=AESGCM(256)   Mac=AEAD
          0x00,0x9E - DHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=DH       Au=RSA Enc=AESGCM(128) Mac=AEAD
0x00,0x9E - DHE-RSA-AES128-GCM-SHA256     TLSv1.2 Kx=DH   Au=RSA   Enc=AESGCM(128)   Mac=AEAD
          0x00,0x9F - DHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=DH       Au=RSA Enc=AESGCM(256) Mac=AEAD
0x00,0x9F - DHE-RSA-AES256-GCM-SHA384     TLSv1.2 Kx=DH   Au=RSA   Enc=AESGCM(256)   Mac=AEAD
          0xC0,0x09 - ECDHE-ECDSA-AES128-SHA SSLv3 Kx=ECDH     Au=ECDSA Enc=AES(128) Mac=SHA1
0xC0,0x23  - ECDHE-ECDSA-AES128-SHA256      TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(128)       Mac=SHA256
          0xC0,0x13 - ECDHE-RSA-AES128-SHA    SSLv3 Kx=ECDH     Au=RSA Enc=AES(128) Mac=SHA1
0xC0,0x27  - ECDHE-RSA-AES128-SHA256        TLSv1.2  Kx=ECDH Au=RSA   Enc=AES(128)       Mac=SHA256
          0xC0,0x0A - ECDHE-ECDSA-AES256-SHA SSLv3 Kx=ECDH     Au=ECDSA Enc=AES(256) Mac=SHA1
0xC0,0x09  - ECDHE-ECDSA-AES128-SHA         SSLv3   Kx=ECDH Au=ECDSA Enc=AES(128)       Mac=SHA1
          0xC0,0x14 - ECDHE-RSA-AES256-SHA    SSLv3 Kx=ECDH     Au=RSA Enc=AES(256) Mac=SHA1
0xC0,0x28  - ECDHE-RSA-AES256-SHA384        TLSv1.2  Kx=ECDH Au=RSA   Enc=AES(256)       Mac=SHA384
          0xC0,0x23 - ECDHE-ECDSA-AES128-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AES(128) Mac=SHA256
0xC0,0x13  - ECDHE-RSA-AES128-SHA          SSLv3    Kx=ECDH Au=RSA    Enc=AES(128)       Mac=SHA1
          0xC0,0x27 - ECDHE-RSA-AES128-SHA256 TLSv1.2 Kx=ECDH     Au=RSA Enc=AES(128) Mac=SHA256
0xC0,0x24  - ECDHE-ECDSA-AES256-SHA384      TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(256)       Mac=SHA384
          0xC0,0x24 - ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AES(256) Mac=SHA384
0xC0,0x0A  - ECDHE-ECDSA-AES256-SHA        SSLv3    Kx=ECDH Au=ECDSA Enc=AES(256)       Mac=SHA1
          0xC0,0x28 - ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH     Au=RSA Enc=AES(256) Mac=SHA384
0xC0,0x14  - ECDHE-RSA-AES256-SHA          SSLv3    Kx=ECDH Au=RSA   Enc=AES(256)       Mac=SHA1
          0x00,0x33 - DHE-RSA-AES128-SHA      SSLv3 Kx=DH       Au=RSA Enc=AES(128) Mac=SHA1
0x00,0x67  - DHE-RSA-AES128-SHA256          TLSv1.2  Kx=DH   Au=RSA   Enc=AES(128)       Mac=SHA256
          0x00,0x39 - DHE-RSA-AES256-SHA     SSLv3 Kx=DH       Au=RSA Enc=AES(256) Mac=SHA1
0x00,0x33  - DHE-RSA-AES128-SHA             SSLv3   Kx=DH   Au=RSA   Enc=AES(128)       Mac=SHA1
          0x00,0x67 - DHE-RSA-AES128-SHA256   TLSv1.2 Kx=DH       Au=RSA Enc=AES(128) Mac=SHA256
0x00,0x6B  - DHE-RSA-AES256-SHA256         TLSv1.2 Kx=DH   Au=RSA   Enc=AES(256)       Mac=SHA256
          0x00,0x6B - DHE-RSA-AES256-SHA256  TLSv1.2 Kx=DH       Au=RSA Enc=AES(256) Mac=SHA256
0x00,0x39  - DHE-RSA-AES256-SHA            SSLv3    Kx=DH   Au=RSA   Enc=AES(256)       Mac=SHA1
          0x00,0x9C - AES128-GCM-SHA256       TLSv1.2 Kx=RSA     Au=RSA Enc=AESGCM(128) Mac=AEAD
0xC0,0x08  -  ECDHE-ECDSA-DES-CBC3-SHA       SSLv3    Kx=ECDH  Au=ECDSA  Enc=3DES(168)      Mac=SHA1
          0x00,0x9D - AES256-GCM-SHA384      TLSv1.2 Kx=RSA      Au=RSA Enc=AESGCM(256) Mac=AEAD
0xC0,0x12  -  ECDHE-RSA-DES-CBC3-SHA        SSLv3    Kx=ECDH  Au=RSA   Enc=3DES(168)     Mac=SHA1
          0x00,0x2F - AES128-SHA             SSLv3 Kx=RSA     Au=RSA Enc=AES(128) Mac=SHA1
0x00,0x16  -  EDH-RSA-DES-CBC3-SHA          SSLv3    Kx=DH    Au=RSA   Enc=3DES(168)     Mac=SHA1
          0x00,0x35 - AES256-SHA             SSLv3 Kx=RSA     Au=RSA Enc=AES(256) Mac=SHA1
0x00,0x9C  - AES128-GCM-SHA256             TLSv1.2  Kx=RSA   Au=RSA   Enc=AESGCM(128)   Mac=AEAD
          0x00,0x3C - AES128-SHA256           TLSv1.2 Kx=RSA     Au=RSA Enc=AES(128) Mac=SHA256
0x00,0x9D  - AES256-GCM-SHA384             TLSv1.2  Kx=RSA   Au=RSA   Enc=AESGCM(256)   Mac=AEAD
          0x00,0x3D - AES256-SHA256           TLSv1.2 Kx=RSA     Au=RSA Enc=AES(256) Mac=SHA256
0x00,0x3C - AES128-SHA256                 TLSv1.2 Kx=RSA   Au=RSA   Enc=AES(128)       Mac=SHA256
          0xC0,0x08 - ECDHE-ECDSA-DES-CBC3-SHA SSLv3 Kx=ECDH    Au=ECDSA Enc=3DES(168) Mac=SHA1
0x00,0x3D - AES256-SHA256                 TLSv1.2 Kx=RSA   Au=RSA   Enc=AES(256)       Mac=SHA256
          0xC0,0x12 - ECDHE-RSA-DES-CBC3-SHA  SSLv3 Kx=ECDH    Au=RSA Enc=3DES(168) Mac=SHA1
0x00,0x2F  - AES128-SHA                     SSLv3   Kx=RSA   Au=RSA   Enc=AES(128)       Mac=SHA1
          0x00,0x16 - DHE-RSA-DES-CBC3-SHA    SSLv3 Kx=DH      Au=RSA Enc=3DES(168) Mac=SHA1
0x00,0x35  - AES256-SHA                     SSLv3   Kx=RSA  Au=RSA   Enc=AES(256)       Mac=SHA1
          0x00,0x0A - DES-CBC3-SHA           SSLv3 Kx=RSA     Au=RSA Enc=3DES(168) Mac=SHA1
0x00,0x0A - DES-CBC3-SHA                   SSLv3   Kx=RSA   Au=RSA   Enc=3DES(168)     Mac=SHA1
</source>
</source>


Rationale:
Rationale:
* ChaCha20 is preferred as the fastest and safest in-software cipher, followed by AES128. There has been discussions ([http://www.mail-archive.com/dev-tech-crypto@lists.mozilla.org/msg11247.html 1], [http://www.mail-archive.com/dev-tech-crypto@lists.mozilla.org/msg12398.html 2]) on whether AES256 extra security was worth its computing cost in software (without AESNI), and the results are far from obvious. At the moment, AES128 is preferred, because it provides good security, is really fast, and seems to be more resistant to timing attacks.
* ChaCha20 is prefered as the fastest and safest in-software cipher, followed by AES128. Unlike the modern configuration, we do not assume clients support AESNI and thus do not prioritize AES256 above 128 and ChaCha20. There has been discussions ([http://www.mail-archive.com/dev-tech-crypto@lists.mozilla.org/msg11247.html 1], [http://www.mail-archive.com/dev-tech-crypto@lists.mozilla.org/msg12398.html 2]) on whether AES256 extra security was worth its computing cost in software (without AESNI), and the results are far from obvious. At the moment, AES128 is preferred, because it provides good security, is really fast, and seems to be more resistant to timing attacks.
* 3DES ciphers are put at the very last due to the SWEET32 attack ([https://sweet32.info 1])
* DES-CBC3-SHA and EDH-RSA-DES-CBC3-SHA are maintained for backward compatibility with clients that do not support AES.
* HMAC-SHA1 is preferred over HMAC-SHA256/SHA384 because the latter does not really provide more security than the former ([https://crypto.stackexchange.com/questions/26510/why-is-hmac-sha1-still-considered-secure 1]), and HMAC-SHA1 is almost twice as fast than HMAC-SHA256/SHA384. Also, AES_CBC is flawed, modern clients will use AES_GCM anyways.
* While the goal is to support a broad range of clients, we reasonably disable a number of ciphers that have little support (such as SEED, CAMELLIA, ...).
* While the goal is to support a broad range of clients, we reasonably disable a number of ciphers that have little support (such as SEED, CAMELLIA, ...).


Line 121: Line 124:
This is the old ciphersuite that works with all clients back to Windows XP/IE6. It should be used as a last resort only.
This is the old ciphersuite that works with all clients back to Windows XP/IE6. It should be used as a last resort only.


* Ciphersuites: '''ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA256:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA:AES256-SHA:AES128-SHA256:AES256-SHA256:AES+DSS:CAMELLIA:SEED:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:DES-CBC3-SHA:3DES:IDEA:+DSS:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!RSAPSK:!SRP:!KRB5:!kDH:!kECDH'''
* Ciphersuites: '''ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:ECDHE-ECDSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:DES-CBC3-SHA:HIGH:SEED:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!RSAPSK:!aDH:!aECDH:!EDH-DSS-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA:!SRP'''
* Versions: '''TLSv1.3 (working in progress), TLSv1.2, TLSv1.1, TLSv1, SSLv3'''
* Versions: '''TLSv1.2, TLSv1.1, TLSv1, SSLv3'''
* TLS curves: '''X25519 (with OpenSSL 1.1.0+), prime256v1, secp521r1, secp384r1'''
* TLS curves: '''prime256v1, secp384r1, secp521r1'''
* Certificate type: '''RSA'''
* Certificate type: '''RSA'''
* Certificate curve: '''N/A'''
* Certificate curve: ''''None'''
* Certificate signature: '''sha256WithRSAEncryption'''
* Certificate signature: '''sha256WithRSAEncryption'''
* RSA key size: '''2048'''
* RSA key size: '''2048'''
* DH Parameter size: '''1024'''
* DH Parameter size: '''1024'''
* ECDH Parameter size: '''256'''
* HSTS: '''max-age=15768000'''
* HSTS: '''max-age=15768000'''
* Certificate switching: '''sha1WithRSAEncryption'''
* Certificate switching: '''sha1WithRSAEncryption'''


<source>
<source>
          0xCC,0xA9 - ECDHE-ECDSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
0xCC,0x14  - ECDHE-ECDSA-CHACHA20-POLY1305   TLSv1.2 Kx=ECDH Au=ECDSA Enc=ChaCha20(256) Mac=AEAD
          0xCC,0xA8 - ECDHE-RSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=RSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
0xCC,0x13  - ECDHE-RSA-CHACHA20-POLY1305     TLSv1.2 Kx=ECDH Au=RSA   Enc=ChaCha20(256) Mac=AEAD
          0xC0,0x2B - ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(128) Mac=AEAD
0xC0,0x2F  - ECDHE-RSA-AES128-GCM-SHA256     TLSv1.2 Kx=ECDH Au=RSA    Enc=AESGCM(128)   Mac=AEAD
          0xC0,0x2F - ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=RSA Enc=AESGCM(128) Mac=AEAD
0xC0,0x2B  - ECDHE-ECDSA-AES128-GCM-SHA256   TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(128)   Mac=AEAD
          0xC0,0x2C - ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(256) Mac=AEAD
0xC0,0x30  - ECDHE-RSA-AES256-GCM-SHA384     TLSv1.2 Kx=ECDH Au=RSA    Enc=AESGCM(256)   Mac=AEAD
          0xC0,0x30 - ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=RSA Enc=AESGCM(256) Mac=AEAD
0xC0,0x2C  - ECDHE-ECDSA-AES256-GCM-SHA384   TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256)   Mac=AEAD
          0x00,0x9E - DHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=DH       Au=RSA Enc=AESGCM(128) Mac=AEAD
0x00,0x9E - DHE-RSA-AES128-GCM-SHA256       TLSv1.2 Kx=DH   Au=RSA   Enc=AESGCM(128)   Mac=AEAD
          0x00,0x9F - DHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=DH       Au=RSA  Enc=AESGCM(256) Mac=AEAD
0x00,0xA2  - DHE-DSS-AES128-GCM-SHA256      TLSv1.2 Kx=DH   Au=DSS    Enc=AESGCM(128)   Mac=AEAD
          0xC0,0x09 - ECDHE-ECDSA-AES128-SHA SSLv3 Kx=ECDH    Au=ECDSA Enc=AES(128) Mac=SHA1
0x00,0xA3  -  DHE-DSS-AES256-GCM-SHA384      TLSv1.2 Kx=DH    Au=DSS    Enc=AESGCM(256)   Mac=AEAD
          0xC0,0x13 - ECDHE-RSA-AES128-SHA    SSLv3 Kx=ECDH    Au=RSA Enc=AES(128) Mac=SHA1
0x00,0x9F  - DHE-RSA-AES256-GCM-SHA384      TLSv1.2  Kx=DH    Au=RSA   Enc=AESGCM(256)   Mac=AEAD
          0xC0,0x0A - ECDHE-ECDSA-AES256-SHA SSLv3 Kx=ECDH     Au=ECDSA Enc=AES(256) Mac=SHA1
0xC0,0x27  - ECDHE-RSA-AES128-SHA256        TLSv1.2 Kx=ECDH Au=RSA    Enc=AES(128)       Mac=SHA256
          0xC0,0x14 - ECDHE-RSA-AES256-SHA    SSLv3 Kx=ECDH     Au=RSA Enc=AES(256) Mac=SHA1
0xC0,0x23  - ECDHE-ECDSA-AES128-SHA256      TLSv1.2  Kx=ECDH Au=ECDSA Enc=AES(128)       Mac=SHA256
          0xC0,0x23 - ECDHE-ECDSA-AES128-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AES(128) Mac=SHA256
0xC0,0x13  - ECDHE-RSA-AES128-SHA            SSLv3    Kx=ECDH Au=RSA    Enc=AES(128)       Mac=SHA1
          0xC0,0x27 - ECDHE-RSA-AES128-SHA256 TLSv1.2 Kx=ECDH     Au=RSA Enc=AES(128) Mac=SHA256
0xC0,0x09  - ECDHE-ECDSA-AES128-SHA          SSLv3    Kx=ECDH Au=ECDSA Enc=AES(128)       Mac=SHA1
          0xC0,0x24 - ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AES(256) Mac=SHA384
0xC0,0x28  - ECDHE-RSA-AES256-SHA384         TLSv1.2 Kx=ECDH Au=RSA    Enc=AES(256)       Mac=SHA384
          0xC0,0x28 - ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH     Au=RSA Enc=AES(256) Mac=SHA384
0xC0,0x24  - ECDHE-ECDSA-AES256-SHA384       TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(256)       Mac=SHA384
          0x00,0x33 - DHE-RSA-AES128-SHA     SSLv3 Kx=DH      Au=RSA Enc=AES(128) Mac=SHA1
0xC0,0x14  - ECDHE-RSA-AES256-SHA           SSLv3   Kx=ECDH  Au=RSA   Enc=AES(256)       Mac=SHA1
          0x00,0x39 - DHE-RSA-AES256-SHA     SSLv3 Kx=DH      Au=RSA Enc=AES(256) Mac=SHA1
0xC0,0x0A  - ECDHE-ECDSA-AES256-SHA         SSLv3   Kx=ECDH  Au=ECDSA Enc=AES(256)       Mac=SHA1
          0x00,0x67 - DHE-RSA-AES128-SHA256   TLSv1.2 Kx=DH       Au=RSA Enc=AES(128) Mac=SHA256
0x00,0x67 - DHE-RSA-AES128-SHA256           TLSv1.2 Kx=DH   Au=RSA   Enc=AES(128)       Mac=SHA256
          0x00,0x6B - DHE-RSA-AES256-SHA256  TLSv1.2 Kx=DH       Au=RSA Enc=AES(256) Mac=SHA256
0x00,0x33  - DHE-RSA-AES128-SHA              SSLv3    Kx=DH   Au=RSA   Enc=AES(128)       Mac=SHA1
          0x00,0x9C - AES128-GCM-SHA256       TLSv1.2 Kx=RSA      Au=RSA  Enc=AESGCM(128) Mac=AEAD
0x00,0x40  -  DHE-DSS-AES128-SHA256           TLSv1.2 Kx=DH    Au=DSS    Enc=AES(128)       Mac=SHA256
          0x00,0x9D - AES256-GCM-SHA384      TLSv1.2 Kx=RSA      Au=RSA Enc=AESGCM(256) Mac=AEAD
0x00,0x6B  -  DHE-RSA-AES256-SHA256          TLSv1.2 Kx=DH    Au=RSA   Enc=AES(256)       Mac=SHA256
          0x00,0x2F - AES128-SHA              SSLv3 Kx=RSA      Au=RSA  Enc=AES(128) Mac=SHA1
0x00,0x38  - DHE-DSS-AES256-SHA              SSLv3   Kx=DH    Au=DSS    Enc=AES(256)       Mac=SHA1
          0x00,0x35 - AES256-SHA              SSLv3 Kx=RSA      Au=RSA Enc=AES(256) Mac=SHA1
0x00,0x39  -  DHE-RSA-AES256-SHA              SSLv3   Kx=DH    Au=RSA   Enc=AES(256)       Mac=SHA1
          0x00,0x3C - AES128-SHA256          TLSv1.2 Kx=RSA     Au=RSA Enc=AES(128) Mac=SHA256
0xC0,0x12  - ECDHE-RSA-DES-CBC3-SHA          SSLv3    Kx=ECDH  Au=RSA   Enc=3DES(168)     Mac=SHA1
          0x00,0x3D - AES256-SHA256          TLSv1.2 Kx=RSA      Au=RSA Enc=AES(256) Mac=SHA256
0xC0,0x08  - ECDHE-ECDSA-DES-CBC3-SHA        SSLv3    Kx=ECDH  Au=ECDSA Enc=3DES(168)     Mac=SHA1
          0xC0,0x73 - ECDHE-ECDSA-CAMELLIA256-SHA384 TLSv1.2 Kx=ECDH    Au=ECDSA Enc=Camellia(256) Mac=SHA384
0x00,0x16  -  EDH-RSA-DES-CBC3-SHA            SSLv3    Kx=DH    Au=RSA    Enc=3DES(168)     Mac=SHA1
          0xC0,0x77 - ECDHE-RSA-CAMELLIA256-SHA384 TLSv1.2 Kx=ECDH    Au=RSA Enc=Camellia(256) Mac=SHA384
0x00,0x9C  - AES128-GCM-SHA256              TLSv1.2 Kx=RSA  Au=RSA   Enc=AESGCM(128)   Mac=AEAD
          0x00,0xC4 - DHE-RSA-CAMELLIA256-SHA256 TLSv1.2 Kx=DH      Au=RSA Enc=Camellia(256) Mac=SHA256
0x00,0x9D  - AES256-GCM-SHA384              TLSv1.2 Kx=RSA  Au=RSA   Enc=AESGCM(256)   Mac=AEAD
          0xC0,0x72 - ECDHE-ECDSA-CAMELLIA128-SHA256 TLSv1.2 Kx=ECDH    Au=ECDSA Enc=Camellia(128) Mac=SHA256
0x00,0x3C  - AES128-SHA256                   TLSv1.2 Kx=RSA  Au=RSA    Enc=AES(128)       Mac=SHA256
          0xC0,0x76 - ECDHE-RSA-CAMELLIA128-SHA256 TLSv1.2 Kx=ECDH    Au=RSA Enc=Camellia(128) Mac=SHA256
0x00,0x3D  - AES256-SHA256                   TLSv1.2 Kx=RSA  Au=RSA   Enc=AES(256)       Mac=SHA256
          0x00,0xBE - DHE-RSA-CAMELLIA128-SHA256 TLSv1.2 Kx=DH      Au=RSA Enc=Camellia(128) Mac=SHA256
0x00,0x2F  - AES128-SHA                      SSLv3    Kx=RSA  Au=RSA   Enc=AES(128)       Mac=SHA1
          0x00,0x88 - DHE-RSA-CAMELLIA256-SHA SSLv3 Kx=DH      Au=RSA Enc=Camellia(256) Mac=SHA1
0x00,0x35  - AES256-SHA                     SSLv3   Kx=RSA  Au=RSA   Enc=AES(256)       Mac=SHA1
          0x00,0x45 - DHE-RSA-CAMELLIA128-SHA SSLv3 Kx=DH       Au=RSA  Enc=Camellia(128) Mac=SHA1
0x00,0x6A  - DHE-DSS-AES256-SHA256          TLSv1.2  Kx=DH   Au=DSS    Enc=AES(256)       Mac=SHA256
          0x00,0xC0 - CAMELLIA256-SHA256      TLSv1.2 Kx=RSA      Au=RSA  Enc=Camellia(256) Mac=SHA256
0x00,0x32  -  DHE-DSS-AES128-SHA              SSLv3    Kx=DH    Au=DSS    Enc=AES(128)       Mac=SHA1
          0x00,0xBA - CAMELLIA128-SHA256      TLSv1.2 Kx=RSA     Au=RSA Enc=Camellia(128) Mac=SHA256
0x00,0x0A  - DES-CBC3-SHA                    SSLv3    Kx=RSA   Au=RSA   Enc=3DES(168)     Mac=SHA1
          0x00,0x84 - CAMELLIA256-SHA         SSLv3 Kx=RSA      Au=RSA Enc=Camellia(256) Mac=SHA1
0x00,0x9A  - DHE-RSA-SEED-SHA               SSLv3   Kx=DH    Au=RSA   Enc=SEED(128)     Mac=SHA1
          0x00,0x41 - CAMELLIA128-SHA         SSLv3 Kx=RSA      Au=RSA  Enc=Camellia(128) Mac=SHA1
0x00,0x99  -  DHE-DSS-SEED-SHA               SSLv3   Kx=DH    Au=DSS    Enc=SEED(128)     Mac=SHA1
          0x00,0x9A - DHE-RSA-SEED-SHA        SSLv3 Kx=DH       Au=RSA Enc=SEED(128) Mac=SHA1
0xCC,0x15  - DHE-RSA-CHACHA20-POLY1305       TLSv1.2  Kx=DH    Au=RSA   Enc=ChaCha20(256) Mac=AEAD
          0x00,0x96 - SEED-SHA                SSLv3 Kx=RSA     Au=RSA Enc=SEED(128) Mac=SHA1
0xC0,0x77  - ECDHE-RSA-CAMELLIA256-SHA384    TLSv1.2  Kx=ECDH  Au=RSA   Enc=Camellia(256) Mac=SHA384
          0xC0,0x08 - ECDHE-ECDSA-DES-CBC3-SHA SSLv3 Kx=ECDH     Au=ECDSA Enc=3DES(168) Mac=SHA1
0xC0,0x73  - ECDHE-ECDSA-CAMELLIA256-SHA384  TLSv1.2  Kx=ECDH Au=ECDSA Enc=Camellia(256) Mac=SHA384
          0xC0,0x12 - ECDHE-RSA-DES-CBC3-SHA SSLv3 Kx=ECDH    Au=RSA Enc=3DES(168) Mac=SHA1
0x00,0xC4  - DHE-RSA-CAMELLIA256-SHA256      TLSv1.2 Kx=DH    Au=RSA   Enc=Camellia(256) Mac=SHA256
          0x00,0x16 - DHE-RSA-DES-CBC3-SHA    SSLv3 Kx=DH       Au=RSA  Enc=3DES(168) Mac=SHA1
0x00,0xC3  - DHE-DSS-CAMELLIA256-SHA256      TLSv1.2  Kx=DH   Au=DSS    Enc=Camellia(256) Mac=SHA256
          0x00,0x0A - DES-CBC3-SHA           SSLv3 Kx=RSA      Au=RSA Enc=3DES(168) Mac=SHA1
0x00,0x88  -  DHE-RSA-CAMELLIA256-SHA         SSLv3   Kx=DH    Au=RSA   Enc=Camellia(256) Mac=SHA1
          0x00,0x07 - IDEA-CBC-SHA           SSLv3 Kx=RSA      Au=RSA  Enc=IDEA(128) Mac=SHA1
0x00,0x87  - DHE-DSS-CAMELLIA256-SHA         SSLv3   Kx=DH    Au=DSS    Enc=Camellia(256) Mac=SHA1
          0x00,0xA3 - DHE-DSS-AES256-GCM-SHA384 TLSv1.2 Kx=DH      Au=DSS  Enc=AESGCM(256) Mac=AEAD
0x00,0xC0  - CAMELLIA256-SHA256              TLSv1.2 Kx=RSA  Au=RSA    Enc=Camellia(256) Mac=SHA256
          0x00,0xA2 - DHE-DSS-AES128-GCM-SHA256 TLSv1.2 Kx=DH      Au=DSS  Enc=AESGCM(128) Mac=AEAD
0x00,0x84  - CAMELLIA256-SHA                SSLv3    Kx=RSA  Au=RSA    Enc=Camellia(256) Mac=SHA1
          0x00,0x6A - DHE-DSS-AES256-SHA256   TLSv1.2 Kx=DH      Au=DSS  Enc=AES(256)  Mac=SHA256
0xC0,0x76  - ECDHE-RSA-CAMELLIA128-SHA256   TLSv1.2 Kx=ECDH  Au=RSA    Enc=Camellia(128)  Mac=SHA256
          0x00,0x40 - DHE-DSS-AES128-SHA256   TLSv1.2 Kx=DH      Au=DSS Enc=AES(128)  Mac=SHA256
0xC0,0x72  - ECDHE-ECDSA-CAMELLIA128-SHA256 TLSv1.2 Kx=ECDH  Au=ECDSA Enc=Camellia(128)  Mac=SHA256
          0x00,0x38 - DHE-DSS-AES256-SHA     SSLv3 Kx=DH       Au=DSS  Enc=AES(256)  Mac=SHA1
0x00,0xBE  - DHE-RSA-CAMELLIA128-SHA256     TLSv1.2  Kx=DH   Au=RSA    Enc=Camellia(128)  Mac=SHA256
          0x00,0x32 - DHE-DSS-AES128-SHA     SSLv3 Kx=DH       Au=DSS Enc=AES(128)  Mac=SHA1
0x00,0xBD  - DHE-DSS-CAMELLIA128-SHA256     TLSv1.2  Kx=DH   Au=DSS   Enc=Camellia(128)  Mac=SHA256
          0x00,0xC3 - DHE-DSS-CAMELLIA256-SHA256 TLSv1.2 Kx=DH       Au=DSS  Enc=Camellia(256) Mac=SHA256
0x00,0x45  - DHE-RSA-CAMELLIA128-SHA        SSLv3    Kx=DH   Au=RSA    Enc=Camellia(128) Mac=SHA1
          0x00,0xBD - DHE-DSS-CAMELLIA128-SHA256 TLSv1.2 Kx=DH       Au=DSS Enc=Camellia(128) Mac=SHA256
0x00,0x44  - DHE-DSS-CAMELLIA128-SHA        SSLv3    Kx=DH   Au=DSS   Enc=Camellia(128) Mac=SHA1
          0x00,0x87 - DHE-DSS-CAMELLIA256-SHA SSLv3 Kx=DH      Au=DSS  Enc=Camellia(256) Mac=SHA1
0x00,0xBA  - CAMELLIA128-SHA256              TLSv1.2  Kx=RSA  Au=RSA    Enc=Camellia(128) Mac=SHA256
          0x00,0x44 - DHE-DSS-CAMELLIA128-SHA SSLv3 Kx=DH      Au=DSS  Enc=Camellia(128) Mac=SHA1
0x00,0x41  - CAMELLIA128-SHA                 SSLv3   Kx=RSA  Au=RSA    Enc=Camellia(128) Mac=SHA1
          0x00,0x99 - DHE-DSS-SEED-SHA       SSLv3 Kx=DH      Au=DSS  Enc=SEED(128) Mac=SHA1
0x00,0x96  - SEED-SHA                       SSLv3   Kx=RSA  Au=RSA    Enc=SEED(128)     Mac=SHA1
          0x00,0x13 - DHE-DSS-DES-CBC3-SHA    SSLv3 Kx=DH      Au=DSS  Enc=3DES(168) Mac=SHA1
</source>
</source>


Rationale:
Rationale:
* You should take a hard look at your infrastructure needs before using this configuration; it is intended for special use cases only, and most servers should use the intermediate configuration instead.
* You should take a hard look at your infrastructure needs before using this configuration; it is intended for special use cases only, and most servers should use the intermediate configuration instead.
* SSLv3 is enabled to support IE6 on Windows XP.
* SSLv3 is enabled to support WinXP SP2 clients on IE.
* SHA1 certificates are authorized but only via certificate switching, meaning the server must implement custom logic to provide a SHA1 certs to old clients (such as Windows XP pre-SP3), and SHA256 certs to all others. More information in the "Certificates Switching" section later in this document.
* SHA1 certificates are authorized but only via certificate switching, meaning the server must implement custom logic to provide a SHA1 certs to old clients, and SHA256 certs to all others. More information in the "Certificates Switching" section later in this document.
* Most ciphers that are not clearly broken and dangerous to use are supported
* Most ciphers that are not clearly broken and dangerous to use are supported


Line 217: Line 220:
* eNULL contains null-encryption ciphers (cleartext)
* eNULL contains null-encryption ciphers (cleartext)
* EXPORT are legacy weak ciphers that were marked as exportable by US law
* EXPORT are legacy weak ciphers that were marked as exportable by US law
* RC4 contains ciphers that use the deprecated RC4 algorithm
* RC4 contains ciphers that use the deprecated ARCFOUR algorithm
* DES contains ciphers that use the deprecated Data Encryption Standard
* DES contains ciphers that use the deprecated Data Encryption Standard
* SSLv2 contains all ciphers that were defined in the old version of the SSL standard, now deprecated
* SSLv2 contains all ciphers that were defined in the old version of the SSL standard, now deprecated
* MD5 contains all the ciphers that use the deprecated Message Digest 5 as the hashing algorithm
* MD5 contains all the ciphers that use the deprecated message digest 5 as the hashing algorithm
* kDH and kECDH contain static DH/ECDH for key exchange which is rarely used


= Forward Secrecy =
= Forward Secrecy =
Line 305: Line 307:


Unfortunately, some widely used clients lack support for ECDHE and must then rely on DHE to provide perfect forward secrecy:
Unfortunately, some widely used clients lack support for ECDHE and must then rely on DHE to provide perfect forward secrecy:
* Android < 3.0
* Android < 3.0.0
* Java < 7
* Java < 7
* OpenSSL < 1.0.0
* OpenSSL < 1.0.0
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