Duane wrote:

Currently we (CAcert.org) are trying to adopt sha256 or better instead of md5 and sha1 for certificate digest signing and I'm trying to find out the earliest version of firefox/seamonkey that supported sha256 and/or sha512.

NSS 3.8 or later supports SHA-256 with RSA.  NSS 3.10.2 or later
supports SHA-256, SHA-384, and SHA-512 with RSA.

NSS 3.10.2 is in Firefox/Thunderbird 1.5 RC1 and will be in
Firefox/Thunderbird 1.5 final.

You can find the NSS versions used in other Mozilla client
releases in
http://www.mozilla.org/projects/security/pki/nss/mozilla-nss-versions.html.

In summary:
- Mozilla Application Suite 1.4-1.4.2 supports SHA-256 with RSA.
- Mozilla Application Suite 1.5 and 1.6: unknown.  Note: these are
  not widely used because they are not based on long-term Mozilla
  release branches (MOZILLA_1_4_BRANCH and MOZILLA_1_7_BRANCH).
- Mozilla Application Suite 1.7, Firefox 1.0, and Thunderbird 1.0
  support SHA-256 with RSA.
- Firefox 1.5 and Thunderbird 1.5 will support SHA-256, SHA-384,
  and SHA-512 with RSA.

Wan-Teh

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