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fixed SEB session integrity check (allow multiple establish requests

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from same SEB client. This is usful when the SEB sends the userSessionId
multiple times)
This commit is contained in:
anhefti 2021-09-23 09:30:40 +02:00
parent 70358d0128
commit 42993e3c97
1 changed files with 798 additions and 781 deletions
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75
src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/SEBClientConnectionServiceImpl.java
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@ -184,6 +184,23 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
final String clientId) {
return Result.tryCatch(() -> {
final ClientConnection clientConnection = getClientConnection(connectionToken);
checkInstitutionalIntegrity(institutionId, clientConnection);
checkExamIntegrity(examId, clientConnection);
// connection integrity check
if (!clientConnection.status.clientActiveStatus) {
log.error("ClientConnection integrity violation: client connection is not in expected state: {}",
clientConnection);
throw new IllegalArgumentException(
"ClientConnection integrity violation: client connection is not in expected state");
}
if (examId != null) {
checkExamIntegrity(examId);
}
if (log.isDebugEnabled()) {
log.debug(
"SEB client connection, update ClientConnection for "
@ -201,35 +218,8 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
clientId);
}
final ClientConnection clientConnection = getClientConnection(connectionToken);
checkInstitutionalIntegrity(institutionId, clientConnection);
checkExamIntegrity(examId, clientConnection);
// connection integrity check
if (clientConnection.status != ConnectionStatus.CONNECTION_REQUESTED) {
log.error("ClientConnection integrity violation: client connection is not in expected state: {}",
clientConnection);
throw new IllegalArgumentException(
"ClientConnection integrity violation: client connection is not in expected state");
}
if (examId != null) {
checkExamIntegrity(examId);
}
// userSessionId integrity check
if (userSessionId != null &&
clientConnection.userSessionId != null &&
!userSessionId.equals(clientConnection.userSessionId)) {
log.error(
"User session identifier integrity violation: another User session identifier is already set for the connection: {}",
clientConnection);
throw new IllegalArgumentException(
"User session identifier integrity violation: another User session identifier is already set for the connection");
}
updateUserSessionId(userSessionId, clientConnection, examId);
final ClientConnection updatedClientConnection = this.clientConnectionDAO
.save(new ClientConnection(
clientConnection.id,
@ -273,6 +263,34 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
return Result.tryCatch(() -> {
ClientConnection clientConnection = getClientConnection(connectionToken);
// connection integrity check
if (clientConnection.status == ConnectionStatus.ACTIVE) {
if (clientConnection.clientAddress != null && clientConnection.clientAddress.equals(clientAddress)) {
// It seems that this is the same SEB that tries to establish the connection once again.
// Just log this and return already established connection
if (log.isDebugEnabled()) {
log.debug(
"SEB retired to establish an already established client connection. Client adress: {} : {}",
clientConnection.clientAddress,
clientAddress);
}
return clientConnection;
} else {
// It seems that this is a request from an other device then the original
log.error("ClientConnection integrity violation: client connection mismatch: {}",
clientConnection);
throw new IllegalArgumentException(
"ClientConnection integrity violation: client connection mismatch");
}
} else if (!clientConnection.status.clientActiveStatus) {
log.error("ClientConnection integrity violation: client connection is not in expected state: {}",
clientConnection);
throw new IllegalArgumentException(
"ClientConnection integrity violation: client connection is not in expected state");
}
if (log.isDebugEnabled()) {
log.debug(
"SEB client connection, establish ClientConnection for "
@ -290,7 +308,6 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
clientId);
}
ClientConnection clientConnection = getClientConnection(connectionToken);
checkInstitutionalIntegrity(institutionId, clientConnection);
checkExamIntegrity(examId, clientConnection);
clientConnection = updateUserSessionId(userSessionId, clientConnection, examId);