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https://issues.apache.org/jira/browse/DIRMINA-1008?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Valliere updated DIRMINA-1008:
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Sprint: Mina Sprint 1
> fromHexString converts non-hex Strings to ByteBuffer
> ----------------------------------------------------
>
> Key: DIRMINA-1008
> URL: https://issues.apache.org/jira/browse/DIRMINA-1008
> Project: MINA
> Issue Type: Bug
> Components: Core
> Reporter: nullpointer
> Assignee: Jonathan Valliere
> Priority: Major
>
> I came across this by accident in class org.apache.mina.util.ByteBufferDumper:
> [fromHexString|https://git-wip-us.apache.org/repos/asf?p=mina.git;a=blob;f=core/src/main/java/org/apache/mina/util/ByteBufferDumper.java;h=e351a139a4a13a2028f55898716e19f21a33a4d4;hb=HEAD#l138]
> happily converts Strings like "ff, fa, f2" and "not a hex string" to bytes.
> Here is a suggestion for curing the problem:
> {code}
> public static ByteBuffer fromHexString(final String hex) {
> if (null == hex) {
> throw new IllegalArgumentException(
> "null argument not permitted");
> } else if (hex.length() % 2 != 0) {
> throw new IllegalArgumentException(
> "the hexadecimal string length cannot be odd");
> }
> int size = hex.length() / 2;
> ByteBuffer res = ByteBuffer.allocate(size);
> for (int i = 0; i < hex.length(); i += 2) {
> int b = Integer.parseInt(hex.substring(i, i + 2), 16);
> if (Integer.highestOneBit(b) == 128) {
> b = b - 256;
> }
> res.put((byte) b);
> }
> res.flip();
> return res;
> }
> {code}
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