FAQ update to mention Applink.

[openssl.git] / FAQ

diff --git a/FAQ b/FAQ
index 463bc1e139668685b19e2d41f03e110fa9976aa5..30913a11b3039fb3b8a6dbfa861e2c1a95364e09 100644 (file)
--- a/FAQ
+++ b/FAQ
@@ -70,7 +70,7 @@ OpenSSL  -  Frequently Asked Questions
 * Which is the current version of OpenSSL?
 
 The current version is available from <URL: http://www.openssl.org>.
-OpenSSL 0.9.7e was released on October 25, 2004.
+OpenSSL 0.9.7g was released on April 11, 2005.
 
 In addition to the current stable release, you can also access daily
 snapshots of the OpenSSL development version at <URL:
@@ -152,7 +152,8 @@ Use MD5 to check that a tarball from a mirror site is identical:
    md5sum TARBALL | awk '{print $1;}' | cmp - TARBALL.md5
 
 You can check authenticity using pgp or gpg. You need the OpenSSL team
-member public key used to sign it (download it from a key server). Then
+member public key used to sign it (download it from a key server, see a
+list of keys at <URL: http://www.openssl.org/about/>). Then
 just do:
 
    pgp TARBALL.asc
@@ -166,8 +167,8 @@ you if you want to use OpenSSL.  For information on intellectual
 property rights, please consult a lawyer.  The OpenSSL team does not
 offer legal advice.
 
-You can configure OpenSSL so as not to use RC5 and IDEA by using
- ./config no-rc5 no-idea
+You can configure OpenSSL so as not to use IDEA, MDC2 and RC5 by using
+ ./config no-idea no-mdc2 no-rc5
 
 
 * Can I use OpenSSL with GPL software?
@@ -472,6 +473,10 @@ This will only compile sha_dgst.c with -O0, the rest with the optimization
 level chosen by the configuration process.  When the above is done, do the
 test and installation and you're set.
 
+3. Reconfigure the toolkit with no-sha0 option to leave out SHA0. It 
+should not be used and is not used in SSL/TLS nor any other recognized
+protocol in either case.
+
 
 * Why does the OpenSSL compilation fail with "ar: command not found"?
 
@@ -647,6 +652,17 @@ by:
 Note that debug and release libraries are NOT interchangeable.  If you
 built OpenSSL with /MD your application must use /MD and cannot use /MDd.
 
+As per 0.9.8 the above limitation is eliminated for .DLLs. OpenSSL
+.DLLs compiled with some specific run-time option [we recommend the
+default /MD] can be deployed with application compiled with different
+option or even different compiler. But there is a catch! Instead of
+re-compiling OpenSSL toolkit, as you would have to with prior versions,
+you have to compile small C snippet with compiler and/or options of
+your choice. The snippet gets installed as
+<install-root>/include/openssl/applink.c and should be either added to
+your project or simply #include-d in one [and only one] of your source
+files. Failure to do either manifests itself as fatal "no
+OPENSSL_Applink" error.
 
 * How do I read or write a DER encoded buffer using the ASN1 functions?
 
@@ -788,9 +804,20 @@ that is allocated when an application starts up. Since such tables do not grow
 in size over time they are harmless.
 
 These internal tables can be freed up when an application closes using various
-functions.  Currently these include: EVP_cleanup(), ERR_remove_state(),
-ERR_free_strings(), ENGINE_cleanup(), CONF_modules_unload() and
-CRYPTO_cleanup_all_ex_data().
+functions.  Currently these include following:
+
+Thread-local cleanup functions:
+
+  ERR_remove_state()
+
+Application-global cleanup functions that are aware of usage (and therefore
+thread-safe):
+
+  ENGINE_cleanup() and CONF_modules_unload()
+
+"Brutal" (thread-unsafe) Application-global cleanup functions:
+
+  ERR_free_strings(), EVP_cleanup() and CRYPTO_cleanup_all_ex_data().
 
 
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