svrc-personal
/ gist:5a8accc57219b9548fe1
Last active
May 11, 2020 15:39
JDK 8 seems to use /dev/urandom and /dev/random more sensibly
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Summary of Behaviour: | |
| A. OpenJDK 7 b65. | |
| 1. Default in java.security is securerandom.source=/dev/urandom | |
| 2. If securerandom.source=/dev/urandom, NativePRNG is used, SecureRandom.nextBytes() is non-blocking via /dev/urandom ; SecureRandom.generateSeed(x) is blocking via /dev/random | |
| 3. if securerandom.source=/dev/random, then SHA1PRNG is used. Initial seed is blocking via /dev/random. No other accesses. | |
| 4. If securerandom.source=/dev/./urandom then SHA1PRNG is used. Initial seed is non-blocking via /dev/./urandom. No other accesses. | |
| B. Oracle JDK 8 b25. |