Avoid String use with secure strings#1813
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lilgreenbird merged 2 commits intomicrosoft:mainfrom Apr 27, 2022
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| if (chars == null) | ||
| return null; | ||
| SecureRandom random = new SecureRandom(); | ||
| random.nextBytes(iv); |
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This is very fragile. Out of order encrypt-decrypt calls will not work because iv is stored in instance variable.
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Since Strings are immutable in Java and tend to stay around in memory for potential re-use in the JVM, it's best practice to avoid them for sensitive data. It's recommended to use char arrays instead and clear/overwrite them once they're no longer needed. This limits the amount of time sensitive data remains in memory.