[KUDU-2979] Add wrap up function of krb5_parse_name, so it can be called from Impala

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.12.0
• Fix Version/s: 1.12.0
• Component/s: security
• Assignee: Xiaomeng Zhang
• Reporter: Xiaomeng Zhang
• Created: 18/Oct/19 21:53
• Updated: 28/Oct/19 20:47
• Resolved: 28/Oct/19 20:47

Description

From work of https://issues.apache.org/jira/browse/IMPALA-7504, we want to use  krb5_parse_name() to parse the principal instead of creating our own.

As src/kudu/security/init.cc already have g_krb5_ctx initialized, we want to leverage the code in KUDU, and create a wrap up function which can be called from IMPALA 

Krb5parseName(const string& principal, string* service_name,
string* hostname, string* realm)