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res_pjsip_stir_shaken: RFC 8225 compliance and error message cleanup. 

From RFC 8225 Section 5.2.1:

    The "dest" claim is a JSON object with the claim name of "dest"
    and MUST have at least one identity claim object.  The "dest"
    claim value is an array containing one or more identity claim JSON
    objects representing the destination identities of any type
    (currently "tn" or "uri").  If the "dest" claim value array
    contains both "tn" and "uri" claim names, the JSON object should
    list the "tn" array first and the "uri" array second.  Within the
    "tn" and "uri" arrays, the identity strings should be put in
    lexicographical order, including the scheme-specific portion of
    the URI characters.

Additionally, make it clear that there was a failure to sign the JWT
payload and not necessarily a memory allocation failure.

Change-Id: Ia8733b861aef6edfaa9c2136e97b447a01578dc9
This commit is contained in:
Sean Bright 2021-07-15 16:04:01 -04:00 committed by Benjamin Keith Ford
parent 4bd975f415
commit 30feaadabf
1 changed files with 2 additions and 2 deletions
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4
res/res_pjsip_stir_shaken.c
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@ -255,7 +255,7 @@ static int add_identity_header(const struct ast_sip_session *session, pjsip_tx_d
ast_copy_pj_str(dest_tn, &uri->user, uri->user.slen + 1);
/* x5u (public key URL), attestation, and origid will be added by ast_stir_shaken_sign */
json = ast_json_pack("{s: {s: s, s: s, s: s}, s: {s: {s: s}, s: {s: s}}}",
json = ast_json_pack("{s: {s: s, s: s, s: s}, s: {s: {s: [s]}, s: {s: s}}}",
"header", "alg", "ES256", "ppt", "shaken", "typ", "passport",
"payload", "dest", "tn", dest_tn, "orig", "tn",
session->id.number.str);
@ -266,7 +266,7 @@ static int add_identity_header(const struct ast_sip_session *session, pjsip_tx_d
ss_payload = ast_stir_shaken_sign(json);
if (!ss_payload) {
ast_log(LOG_ERROR, "Failed to allocate memory for STIR/SHAKEN payload\n");
ast_log(LOG_ERROR, "Failed to sign STIR/SHAKEN payload\n");
return -1;
}