Psudocode or Algorithm for Sha1PRNG (Secure Random class)

Can you help me by giving the function of that algorithm? SHA1PRNG. I've searched in the Java help but it just told it was built in. Does someone know what is the funtion of the SHA1PRNG. Does it have funtion such as Y=X mod 3 or something like that?Thanks for your help.....
[290 byte] By [henryiriawana] at [2007-10-1 2:35:21]
# 1
http://java.sun.com/j2se/1.4.2/docs/api/java/security/SecureRandom.html
bbrittaa at 2007-7-8 11:43:04 > top of Java-index,Other Topics,Algorithms...
# 2
If I'm not mistaken (and I often am), it outputs the sha1 digest of the output of another PRNG. I don't really know more than that.Why not check in the Java source code? The source code for the sha1prng SecureRandom class is probably in there, and documented.
MarkFairchilda at 2007-7-8 11:43:04 > top of Java-index,Other Topics,Algorithms...
# 3
Check the code of the classsun.security.provider.SecureRandomin the SCSL Source Code. (No, it's not in src.zip from the J2SDK). The source code for the SecureRandom class mentioned above will be unpacked in the directory j2se\src\share\classes\sun\security\provider
edsonwa at 2007-7-8 11:43:04 > top of Java-index,Other Topics,Algorithms...