Stuart Charlton svrc-personal
svrc-personal
/ gist:5a8accc57219b9548fe1
Last active
May 11, 2020 15:39
JDK 8 seems to use /dev/urandom and /dev/random more sensibly
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| 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. |