JDK-8226543 : Reduce GC pressure during message digest calculations in password-based encryption
- Type: Enhancement
- Component: security-libs
- Sub-Component: javax.crypto
- Affected Version: 8,11,13,14
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- Submitted: 2019-06-21
- Updated: 2022-06-27
- Resolved: 2019-06-26
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| JDK 11 | JDK 13 | JDK 14 | JDK 8 | Other |
|---|---|---|---|---|
| 11.0.5-oracleFixed | 13.0.1Fixed | 14 b03Fixed  |
8u221Fixed |
openjdk8u232Fixed |
Description
In PBES1Core.deriveCipherKey() there are loops that look like following:
for (int i = 0; i < iCount; i++) {
md.update(toBeHashed);
toBeHashed = md.digest(); // this resets the digest
}
Calling md.digest() each time allocates a new byte[] array.
It would be more GC friendly, if the same array were reused.
Comments
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