specific to coldfusion 8 with an webserver with modern ssl ciphers:
I use coldfusion 8 on JDK 1.6.45 and had problems with <cfdocument ...> giving me just red crosses instead of images, and also with cfhttp not able to connect to the local webserver with ssl.
my test script to reproduce with coldfusion 8 was
<CFHTTP URL="https://www.onlineumfragen.com" METHOD="get" ></CFHTTP>
<CFDUMP VAR="#CFHTTP#">
this gave me the quite generic error of " I/O Exception: peer not authenticated."
I then tried to add certificates of the server including root and intermediate certificates to the java keystore and also the coldfusion keystore, but nothing helped.
then I debugged the problem with
java SSLPoke www.onlineumfragen.com 443
and got
javax.net.ssl.SSLException: java.lang.RuntimeException: Could not generate DH keypair
and
Caused by: java.security.InvalidAlgorithmParameterException: Prime size must be
multiple of 64, and can only range from 512 to 1024 (inclusive)
at com.sun.crypto.provider.DHKeyPairGenerator.initialize(DashoA13*..)
at java.security.KeyPairGenerator$Delegate.initialize(KeyPairGenerator.java:627)
at com.sun.net.ssl.internal.ssl.DHCrypt.<init>(DHCrypt.java:107)
... 10 more
I then had the idea that the webserver (apache in my case) had very modern ciphers for ssl and is quite restrictive (qualys score a+) and uses strong Diffie-Hellman groups with more than 1024 bits. obviously, coldfusion and java jdk 1.6.45 can not manage this.
Next step in the odyssee was to think of installing an alternative security provider for java, and I decided for bouncy castle.
see also http://www.itcsolutions.eu/2011/08/22/how-to-use-bouncy-castle-cryptographic-api-in-netbeans-or-eclipse-for-java-jse-projects/
I then downloaded the
bcprov-ext-jdk15on-156.jar
from http://www.bouncycastle.org/latest_releases.html and installed it under
C:\jdk6_45\jre\lib\ext or where ever your jdk is, in original install of coldfusion 8 it would be under C:\JRun4\jre\lib\ext but I use a newer jdk (1.6.45) located outside the coldfusion directory. it is very important to put the bcprov-ext-jdk15on-156.jar in the \ext directory (this cost me about two hours and some hair ;-)
then I edited the file C:\jdk6_45\jre\lib\security\java.security (with wordpad not with editor.exe!) and put in one line for the new provider. afterwards the list looked like
#
# List of providers and their preference orders (see above):
#
security.provider.1=org.bouncycastle.jce.provider.BouncyCastleProvider
security.provider.2=sun.security.provider.Sun
security.provider.3=sun.security.rsa.SunRsaSign
security.provider.4=com.sun.net.ssl.internal.ssl.Provider
security.provider.5=com.sun.crypto.provider.SunJCE
security.provider.6=sun.security.jgss.SunProvider
security.provider.7=com.sun.security.sasl.Provider
security.provider.8=org.jcp.xml.dsig.internal.dom.XMLDSigRI
security.provider.9=sun.security.smartcardio.SunPCSC
security.provider.10=sun.security.mscapi.SunMSCAPI
(see the new one in position 1)
then restart coldfusion service completely.
you can then
java SSLPoke www.onlineumfragen.com 443 (or of course your url!)
and enjoy the feeling...
and of course
<cfhttp and <cfdocument worked like a charm and like before we "hardened" our ssl ciphers in apache!
what a night and what a day. Hopefully this will help (partially or fully) to someone out there. if you have questions, just mail me at info ... (domain above).