[NIFI-8630] PutEmail fails to negotiate TLS1.2 with latest JDK.

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.13.2
• Fix Version/s: 1.14.0
• Labels: SMTP TLS TLSv1.2 dependency-upgrade
• Assignee: David Handermann
• Reporter: Branko Peshevski
• Created: 25/May/21 15:27
• Updated: 25/Jun/21 17:18
• Resolved: 25/Jun/21 17:18

Description

On April 20, 2021 with the latest JDK the support for TLS 1.0 and 1.1 was removed/disabled. Using the PutEmail processor with the latest OpenJdk and TLS set to true is failing with:

Failed to send email for StandardFlowFileRecord[uuid=7e8d3482-59ac-4993-a9ea-fa9089ced554,claim=,offset=0,name=7e8d3482-59ac-4993-a9ea-fa9089ced554,size=0]: Could not convert socket to TLS; routing to failure: javax.mail.MessagingException: Could not convert socket to TLS;
  nested exception is:
        javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
javax.mail.MessagingException: Could not convert socket to TLS
        at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1907)
        at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:666)
        at javax.mail.Service.connect(Service.java:317)
        at javax.mail.Service.connect(Service.java:176)
        at javax.mail.Service.connect(Service.java:125)
        at javax.mail.Transport.send0(Transport.java:194)
        at javax.mail.Transport.send(Transport.java:124)
        at org.apache.nifi.processors.standard.PutEmail.send(PutEmail.java:541)
        at org.apache.nifi.processors.standard.PutEmail.onTrigger(PutEmail.java:395)
        at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
        at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1173)
        at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:214)
        at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:117)
        at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)

From my research the javax.mail version is quite old and it is known that 1.4.x fails to renegotiate with better tls algorithm. But I think it would be better to add new Property Descriptor to the PutEmail processor that will default the ssl protocol to TLS1.2.

• Update the javax.mail dependency.
• Add PropertyDescriptor for setting the ssl algorithm that will default to TLS 1.2

Issue Links

• relates to: NIFI-6961 ExtractEmailHeaders does not work with Java 11
• relates to: NIFI-8281 PutEmail Processor fails with Java 11
• links to: GitHub Pull Request #5179