Clinton Nielsen created HTTPCLIENT-1245:
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Summary:
org.apache.http.impl.client.cache.memcached.SHA256KeyHashingScheme use of
MessageDigest should be synchronized
Key: HTTPCLIENT-1245
URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1245
Project: HttpComponents HttpClient
Issue Type: Bug
Components: Cache
Affects Versions: 4.2.1
Reporter: Clinton Nielsen
Function:
public String hash(String key) {
MessageDigest md = getDigest();
md.update(key.getBytes());
return Hex.encodeHexString(md.digest());
}
Should be rewritten to synchronize access to the MessageDigest object:
public String hash(String key) {
MessageDigest md = getDigest();
byte[] digest = null;
synchronized(md) {
md.update(key.getBytes());
digest = md.digest();
}
return Hex.encodeHexString(digest);
}
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