module ietf-tls-common {

    yang-version 1.1;

    namespace
      "urn:ietf:params:xml:ns:yang:ietf-tls-common";

    prefix tlscmn;

    import iana-tls-cipher-suite-algs {
      prefix tlscsa;
      reference
        "RFC FFFF: YANG Groupings for TLS Clients and SSH Servers";


    }

    organization
      "IETF NETCONF (Network Configuration) Working Group";

    contact
      "WG List:  NETCONF WG list <mailto:netconf@ietf.org>
     WG Web:   https://datatracker.ietf.org/wg/netconf
     Author:   Kent Watsen <mailto:kent+ietf@watsen.net>
     Author:   Gary Wu <mailto:garywu@cisco.com>
     Author:   Jeff Hartley <mailto:jeff.hartley@commscope.com>";

    description
      "This module defines a common features and groupings for
     Transport Layer Security (TLS).

     Copyright (c) 2021 IETF Trust and the persons identified
     as authors of the code. All rights reserved.

     Redistribution and use in source and binary forms, with
     or without modification, is permitted pursuant to, and
     subject to the license terms contained in, the Revised
     BSD License set forth in Section 4.c of the IETF Trust's
     Legal Provisions Relating to IETF Documents
     (https://trustee.ietf.org/license-info).

     This version of this YANG module is part of RFC FFFF
     (https://www.rfc-editor.org/info/rfcFFFF); see the RFC
     itself for full legal notices.

     The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL',
     'SHALL NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED',
     'NOT RECOMMENDED', 'MAY', and 'OPTIONAL' in this document
     are to be interpreted as described in BCP 14 (RFC 2119)
     (RFC 8174) when, and only when, they appear in all
     capitals, as shown here.";

    revision "2022-03-07" {
      description "Initial version";
      reference
        "RFC FFFF: YANG Groupings for TLS Clients and TLS Servers";

    }


    feature tls10 {
      status obsolete;
      description
        "TLS Protocol Version 1.0 is supported.  TLS 1.0 is obsolete
       and thus it is NOT RECOMMENDED to enable this feature.";
      reference
        "RFC 2246: The TLS Protocol Version 1.0";

    }

    feature tls11 {
      status obsolete;
      description
        "TLS Protocol Version 1.1 is supported.  TLS 1.1 is obsolete
       and thus it is NOT RECOMMENDED to enable this feature.";
      reference
        "RFC 4346: The Transport Layer Security (TLS) Protocol
        	  Version 1.1";

    }

    feature tls12 {
      status deprecated;
      description
        "TLS Protocol Version 1.2 is supported  TLS 1.2 is obsolete
       and thus it is NOT RECOMMENDED to enable this feature.";
      reference
        "RFC 5246: The Transport Layer Security (TLS) Protocol
        	  Version 1.2";

    }

    feature tls13 {
      description
        "TLS Protocol Version 1.3 is supported.";
      reference
        "RFC 8446: The Transport Layer Security (TLS)
        	  Protocol Version 1.3";

    }

    feature hello-params {
      description
        "TLS hello message parameters are configurable.";
    }

    identity tls-version-base {
      description
        "Base identity used to identify TLS protocol versions.";
    }

    identity tls10 {
      base tls-version-base;
      status obsolete;
      description
        "TLS Protocol Version 1.0.";
      reference
        "RFC 2246: The TLS Protocol Version 1.0";

    }

    identity tls11 {
      base tls-version-base;
      status obsolete;
      description
        "TLS Protocol Version 1.1.";
      reference
        "RFC 4346: The Transport Layer Security (TLS) Protocol
        	  Version 1.1";

    }

    identity tls12 {
      base tls-version-base;
      status deprecated;
      description
        "TLS Protocol Version 1.2.";
      reference
        "RFC 5246: The Transport Layer Security (TLS) Protocol
        	  Version 1.2";

    }

    identity tls13 {
      base tls-version-base;
      description
        "TLS Protocol Version 1.3.";
      reference
        "RFC 8446: The Transport Layer Security (TLS)
        	  Protocol Version 1.3";

    }

    typedef epsk-supported-hash {
      type enumeration {
        enum "sha-256" {
          value 0;
          description "The SHA-256 Hash.";
        }
        enum "sha-384" {
          value 1;
          description "The SHA-384 Hash.";
        }
      }
      description
        "As per Section 4.2.11 of RFC 8446, the hash algorithm
       supported by an instance of an External Pre-Shared
       Key (EPSK).";
      reference
        "RFC 8446: The Transport Layer Security (TLS)
        	  Protocol Version 1.3
        I-D.ietf-tls-external-psk-importer: Importing
        	  External PSKs for TLS
        I-D.ietf-tls-external-psk-guidance: Guidance
        	  for External PSK Usage in TLS";

    }
  }  // module ietf-tls-common