37 lines
900 B
Plaintext
37 lines
900 B
Plaintext
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== How to fix it in Java SE
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=== Code examples
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The following code uses a cryptographically strong random number generator to generate data that is not cryptographically strong.
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==== Noncompliant code example
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[source,java,diff-id=1,diff-type=noncompliant]
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----
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SecureRandom sr = new SecureRandom();
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sr.setSeed(123456L); // Noncompliant
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int v = sr.next(32);
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----
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[source,java,diff-id=2,diff-type=noncompliant]
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----
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SecureRandom sr = new SecureRandom("abcdefghijklmnop".getBytes("us-ascii")); // Noncompliant
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int v = sr.next(32);
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----
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==== Compliant solution
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[source,java,diff-id=1,diff-type=compliant]
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----
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SecureRandom sr = new SecureRandom();
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int v = sr.next(32);
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----
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This solution is available for JDK 1.8 and higher.
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[source,java,diff-id=2,diff-type=compliant]
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----
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SecureRandom sr = SecureRandom.getInstanceStrong();
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int v = sr.next(32);
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----
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include::../../common/how-does-it-work.adoc[]
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