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#1783 L3H Talker Alias guard against negative length aliases

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Dennis Sheirer
2024-01-10 02:45:01 -05:00
parent 87ce08e9b9
commit e1e75710cb
2 changed files with 14 additions and 8 deletions
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18
src/main/java/io/github/dsheirer/module/decode/p25/phase2/message/mac/structure/l3harris/L3HarrisTalkerAlias.java
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@@ -78,15 +78,21 @@ public class L3HarrisTalkerAlias extends MacStructure
{
if(mAliasIdentifier == null)
{
int length = getLength() * 8 + getOffset();
int length = getLength();
if(length > getMessage().size())
if(length > 0)
{
length = getMessage().size();
}
length *= 8;
length += getOffset();
String alias = new String(getMessage().getSubMessage(ALIAS_START + getOffset(), length).getBytes()).trim();
mAliasIdentifier = P25TalkerAliasIdentifier.create(alias);
if(length > getMessage().size())
{
length = getMessage().size();
}
String alias = new String(getMessage().getSubMessage(ALIAS_START + getOffset(), length).getBytes()).trim();
mAliasIdentifier = P25TalkerAliasIdentifier.create(alias);
}
}
return mAliasIdentifier;