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MXS-1662 Cleanup PAM conversation function

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Check fuction call counter properly.
This commit is contained in:
Esa Korhonen
2019-04-09 17:16:13 +03:00
parent 5af022cc9f
commit 533d5b522b
1 changed files with 18 additions and 13 deletions
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31
maxutils/maxbase/src/pam_utils.cc
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@ -58,17 +58,32 @@ int conversation_func(int num_msg,
MXB_DEBUG("Entering PAM conversation function.");
int rval = PAM_CONV_ERR;
ConversationData* data = static_cast<ConversationData*>(appdata_ptr);
data->m_counter++;
if (data->m_counter > 1)
{
MXB_ERROR("Multiple calls to conversation function for client '%s'. %s",
data->m_client.c_str(), GENERAL_ERRMSG);
}
else if (num_msg == 1)
else if (num_msg != 1)
{
MXB_ERROR("Conversation function received '%d' messages from API. Only singular messages are "
"supported.", num_msg);
}
else
{
pam_message first = *msg[0];
// Check that the first message from the PAM system is as expected.
if ((first.msg_style == PAM_PROMPT_ECHO_OFF || first.msg_style == PAM_PROMPT_ECHO_ON)
&& (data->m_expected_msg.empty() || data->m_expected_msg == first.msg))
if (first.msg_style != PAM_PROMPT_ECHO_OFF && first.msg_style != PAM_PROMPT_ECHO_ON)
{
MXB_ERROR("Unexpected PAM message type '%i' when '%i' or '%i' was expected.",
first.msg_style, PAM_PROMPT_ECHO_OFF, PAM_PROMPT_ECHO_ON);
}
else if (!data->m_expected_msg.empty() && data->m_expected_msg != first.msg)
{
MXB_ERROR("Unexpected PAM message contents '%s' when '%s' was expected.",
first.msg, data->m_expected_msg.c_str());
}
else
{
pam_response* response = static_cast<pam_response*>(MXS_MALLOC(sizeof(pam_response)));
if (response)
@ -79,17 +94,7 @@ int conversation_func(int num_msg,
rval = PAM_SUCCESS;
}
}
else
{
MXB_ERROR("Unexpected PAM message: type='%d', contents='%s'", first.msg_style, first.msg);
}
}
else
{
MXB_ERROR("Conversation function received '%d' messages from API. Only singular messages are "
"supported.", num_msg);
}
data->m_counter++;
return rval;
}