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krb5-mini
0110-resolve-krb5-GSS-creds-if-time_rec-is-requ...
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File 0110-resolve-krb5-GSS-creds-if-time_rec-is-requested.patch of Package krb5-mini
From 50f426ac17a81ff5b7c212c24645b9874ea911f0 Mon Sep 17 00:00:00 2001 From: Simo Sorce <simo@redhat.com> Date: Mon, 17 Aug 2015 13:21:42 -0400 Subject: [PATCH] Resolve krb5 GSS creds if time_rec is requested The code normally tries to defer credential acquisition to a later time. However, if the application requests the lifetime, the code needs to resolve the credential and return the actual expiration time. Returning 0 would cause the application to think credentials are expired. In the mechglue, pass through null time_rec pointers to the mech so that the mech knows whether it was requested. In SPNEGO, pass through time_rec to the mech when acquiring creds, via a new parameter to get_available_mechs(). [ghudson@mit.edu: minor style changes; edit and expand commit message] ticket: 8235 (new) --- src/lib/gssapi/krb5/acquire_cred.c | 9 ++++++++- src/lib/gssapi/mechglue/g_acquire_cred.c | 14 +++++++++----- src/lib/gssapi/spnego/spnego_mech.c | 15 ++++++++------- 3 files changed, 25 insertions(+), 13 deletions(-) diff --git a/src/lib/gssapi/krb5/acquire_cred.c b/src/lib/gssapi/krb5/acquire_cred.c index 5bcfec9e56..6e83fb9ea1 100644 --- a/src/lib/gssapi/krb5/acquire_cred.c +++ b/src/lib/gssapi/krb5/acquire_cred.c @@ -825,8 +825,15 @@ acquire_cred_context(krb5_context context, OM_uint32 *minor_status, if (code != 0) goto krb_error_out; - if (time_rec) + if (time_rec) { + /* Resolve cred now to determine the expiration time. */ + ret = kg_cred_resolve(minor_status, context, (gss_cred_id_t)cred, + GSS_C_NO_NAME); + if (GSS_ERROR(ret)) + goto error_out; *time_rec = (cred->expire > now) ? (cred->expire - now) : 0; + k5_mutex_unlock(&cred->lock); + } } *minor_status = 0; diff --git a/src/lib/gssapi/mechglue/g_acquire_cred.c b/src/lib/gssapi/mechglue/g_acquire_cred.c index ff250deca4..d29856c2c4 100644 --- a/src/lib/gssapi/mechglue/g_acquire_cred.c +++ b/src/lib/gssapi/mechglue/g_acquire_cred.c @@ -190,8 +190,9 @@ OM_uint32 * time_rec; major = gss_add_cred_from(&tmpMinor, (gss_cred_id_t)creds, desired_name, &mechs->elements[i], cred_usage, time_req, time_req, - cred_store, NULL, NULL, &initTimeOut, - &acceptTimeOut); + cred_store, NULL, NULL, + time_rec ? &initTimeOut : NULL, + time_rec ? &acceptTimeOut : NULL); if (major == GSS_S_COMPLETE) { /* update the credential's time */ if (cred_usage == GSS_C_ACCEPT) { @@ -356,7 +357,7 @@ gss_add_cred_from(minor_status, input_cred_handle, OM_uint32 *acceptor_time_rec; { OM_uint32 status, temp_minor_status; - OM_uint32 time_req, time_rec; + OM_uint32 time_req, time_rec = 0, *time_recp = NULL; gss_union_name_t union_name; gss_union_cred_t new_union_cred, union_cred; gss_name_t internal_name = GSS_C_NO_NAME; @@ -447,15 +448,18 @@ gss_add_cred_from(minor_status, input_cred_handle, if (status != GSS_S_COMPLETE) goto errout; + if (initiator_time_rec != NULL || acceptor_time_rec != NULL) + time_recp = &time_rec; + if (mech->gss_acquire_cred_from) { status = mech->gss_acquire_cred_from(minor_status, internal_name, time_req, target_mechs, cred_usage, cred_store, &cred, - NULL, &time_rec); + NULL, time_recp); } else if (cred_store == GSS_C_NO_CRED_STORE) { status = mech->gss_acquire_cred(minor_status, internal_name, time_req, target_mechs, cred_usage, &cred, NULL, - &time_rec); + time_recp); } else { return GSS_S_UNAVAILABLE; } diff --git a/src/lib/gssapi/spnego/spnego_mech.c b/src/lib/gssapi/spnego/spnego_mech.c index 8ade2454ed..f3d5f092e4 100644 --- a/src/lib/gssapi/spnego/spnego_mech.c +++ b/src/lib/gssapi/spnego/spnego_mech.c @@ -96,7 +96,8 @@ static gss_OID_set get_mech_set(OM_uint32 *, unsigned char **, unsigned int); static OM_uint32 get_req_flags(unsigned char **, OM_uint32, OM_uint32 *); static OM_uint32 get_available_mechs(OM_uint32 *, gss_name_t, gss_cred_usage_t, gss_const_key_value_set_t, - gss_cred_id_t *, gss_OID_set *); + gss_cred_id_t *, gss_OID_set *, + OM_uint32 *); static OM_uint32 get_negotiable_mechs(OM_uint32 *, spnego_gss_cred_id_t, gss_cred_usage_t, gss_OID_set *); static void release_spnego_ctx(spnego_gss_ctx_id_t *); @@ -399,7 +400,7 @@ spnego_gss_acquire_cred_from(OM_uint32 *minor_status, */ status = get_available_mechs(minor_status, desired_name, cred_usage, cred_store, &mcred, - &amechs); + &amechs, time_rec); if (actual_mechs && amechs != GSS_C_NULL_OID_SET) { (void) gssint_copy_oid_set(&tmpmin, amechs, actual_mechs); @@ -2009,7 +2010,7 @@ spnego_gss_inquire_cred( GSS_C_BOTH, GSS_C_NO_CRED_STORE, &creds, - mechanisms); + mechanisms, NULL); if (status != GSS_S_COMPLETE) { dsyslog("Leaving inquire_cred\n"); return (status); @@ -2637,7 +2638,7 @@ spnego_gss_acquire_cred_with_password(OM_uint32 *minor_status, status = get_available_mechs(minor_status, desired_name, cred_usage, GSS_C_NO_CRED_STORE, - NULL, &amechs); + NULL, &amechs, NULL); if (status != GSS_S_COMPLETE) goto cleanup; @@ -3006,7 +3007,7 @@ static OM_uint32 get_available_mechs(OM_uint32 *minor_status, gss_name_t name, gss_cred_usage_t usage, gss_const_key_value_set_t cred_store, - gss_cred_id_t *creds, gss_OID_set *rmechs) + gss_cred_id_t *creds, gss_OID_set *rmechs, OM_uint32 *time_rec) { unsigned int i; int found = 0; @@ -3060,7 +3061,7 @@ get_available_mechs(OM_uint32 *minor_status, GSS_C_INDEFINITE, *rmechs, usage, cred_store, creds, - &goodmechs, NULL); + &goodmechs, time_rec); /* * Drop the old list in favor of the new @@ -3110,7 +3111,7 @@ get_negotiable_mechs(OM_uint32 *minor_status, spnego_gss_cred_id_t spcred, credptr = (usage == GSS_C_INITIATE) ? &creds : NULL; ret = get_available_mechs(minor_status, GSS_C_NO_NAME, usage, GSS_C_NO_CRED_STORE, credptr, - rmechs); + rmechs, NULL); gss_release_cred(&tmpmin, &creds); return (ret); }
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