X-Git-Url: http://www.project-moonshot.org/gitweb/?a=blobdiff_plain;f=util_radius.cpp;h=fe43135e3e211268a8f64cc9242770b987e18f4d;hb=f12a2be8e6409006eaf326c204ea5c99b78b3b2b;hp=7c6552acea1dbe8ced38b2ef5df749f540b79191;hpb=d8f72be580bcb593ce2901768eb26630b5cea992;p=mech_eap.git

diff --git a/util_radius.cpp b/util_radius.cpp
index 7c6552a..fe43135 100644
--- a/util_radius.cpp
+++ b/util_radius.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, JANET(UK)
+ * Copyright (c) 2011, JANET(UK)
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -30,52 +30,36 @@
  * SUCH DAMAGE.
  */
 
+/*
+ * RADIUS attribute provider implementation.
+ */
+
 #include "gssapiP_eap.h"
 
-VALUE_PAIR *
-gss_eap_radius_attr_provider::copyAvps(const VALUE_PAIR *src)
-{
-    const VALUE_PAIR *vp;
-    VALUE_PAIR *dst = NULL, **pDst = &dst;
+/* stuff that should be provided by libradsec/libfreeradius-radius */
+#define VENDORATTR(vendor, attr)            (((vendor) << 16) | (attr))
 
-    for (vp = src; vp != NULL; vp = vp->next) {
-        VALUE_PAIR *vp2;
+#ifndef ATTRID
+#define ATTRID(attr)                        ((attr) & 0xFFFF)
+#endif
 
-        vp2 = (VALUE_PAIR *)GSSEAP_CALLOC(1, sizeof(*vp2));
-        if (vp2 == NULL) {
-            rc_avpair_free(dst);
-            return NULL;
-        }
-        memcpy(vp2, vp, sizeof(*vp));
-        vp2->next = NULL;
-        *pDst = vp2;
-        pDst = &vp2->next;
-    }
+static gss_buffer_desc radiusUrnPrefix = {
+    sizeof("urn:x-radius:") - 1,
+    (void *)"urn:x-radius:"
+};
 
-    return dst;
-}
+static VALUE_PAIR *copyAvps(const VALUE_PAIR *src);
 
 gss_eap_radius_attr_provider::gss_eap_radius_attr_provider(void)
 {
-    m_rh = NULL;
-    m_avps = NULL;
+    m_vps = NULL;
     m_authenticated = false;
 }
 
 gss_eap_radius_attr_provider::~gss_eap_radius_attr_provider(void)
 {
-    if (m_rh != NULL)
-        rc_config_free(m_rh);
-    if (m_avps != NULL)
-        rc_avpair_free(m_avps);
-}
-
-bool
-gss_eap_radius_attr_provider::initFromGssCred(const gss_cred_id_t cred)
-{
-    OM_uint32 minor;
-
-    return !GSS_ERROR(gssEapRadiusAllocHandle(&minor, cred, &m_rh));
+    if (m_vps != NULL)
+        pairfree(&m_vps);
 }
 
 bool
@@ -87,13 +71,12 @@ gss_eap_radius_attr_provider::initFromExistingContext(const gss_eap_attr_ctx *ma
     if (!gss_eap_attr_provider::initFromExistingContext(manager, ctx))
         return false;
 
-    if (!initFromGssCred(GSS_C_NO_CREDENTIAL))
-        return false;
-
     radius = static_cast<const gss_eap_radius_attr_provider *>(ctx);
-    if (radius->m_avps != NULL) {
-        m_avps = copyAvps(radius->getAvps());
-    }
+
+    if (radius->m_vps != NULL)
+        m_vps = copyAvps(const_cast<VALUE_PAIR *>(radius->getAvps()));
+
+    m_authenticated = radius->m_authenticated;
 
     return true;
 }
@@ -106,14 +89,15 @@ gss_eap_radius_attr_provider::initFromGssContext(const gss_eap_attr_ctx *manager
     if (!gss_eap_attr_provider::initFromGssContext(manager, gssCred, gssCtx))
         return false;
 
-    if (!initFromGssCred(gssCred))
-        return false;
-
     if (gssCtx != GSS_C_NO_CONTEXT) {
-        if (gssCtx->acceptorCtx.avps != NULL) {
-            m_avps = copyAvps(gssCtx->acceptorCtx.avps);
-            if (m_avps == NULL)
+        if (gssCtx->acceptorCtx.vps != NULL) {
+            m_vps = copyAvps(gssCtx->acceptorCtx.vps);
+            if (m_vps == NULL)
                 return false;
+
+            /* We assume libradsec validated this for us */
+            assert(pairfind(m_vps, PW_MESSAGE_AUTHENTICATOR) != NULL);
+            m_authenticated = true;
         }
     }
 
@@ -133,22 +117,113 @@ alreadyAddedAttributeP(std::vector <std::string> &attrs, VALUE_PAIR *vp)
     return false;
 }
 
+static bool
+isSecretAttributeP(uint16_t attrid, uint16_t vendor)
+{
+    bool bSecretAttribute = false;
+
+    switch (vendor) {
+    case VENDORPEC_MS:
+        switch (attrid) {
+        case PW_MS_MPPE_SEND_KEY:
+        case PW_MS_MPPE_RECV_KEY:
+            bSecretAttribute = true;
+            break;
+        default:
+            break;
+        }
+    default:
+        break;
+    }
+
+    return bSecretAttribute;
+}
+
+static bool
+isSecretAttributeP(uint32_t attribute)
+{
+    return isSecretAttributeP(ATTRID(attribute), VENDOR(attribute));
+}
+
+static bool
+isInternalAttributeP(uint16_t attrid, uint16_t vendor)
+{
+    bool bInternalAttribute = false;
+
+    /* should have been filtered */
+    assert(!isSecretAttributeP(attrid, vendor));
+
+    switch (vendor) {
+    case VENDORPEC_UKERNA:
+        bInternalAttribute = true;
+        break;
+    default:
+        break;
+    }
+
+    return bInternalAttribute;
+}
+
+static bool
+isInternalAttributeP(uint32_t attribute)
+{
+    return isInternalAttributeP(ATTRID(attribute), VENDOR(attribute));
+}
+
+/*
+ * Copy AVP list, same as paircopy except it filters out attributes
+ * containing keys.
+ */
+static VALUE_PAIR *
+copyAvps(const VALUE_PAIR *src)
+{
+    const VALUE_PAIR *vp;
+    VALUE_PAIR *dst = NULL, **pDst = &dst;
+
+    for (vp = src; vp != NULL; vp = vp->next) {
+        VALUE_PAIR *vpcopy;
+
+        if (isSecretAttributeP(vp->attribute))
+            continue;
+
+        vpcopy = paircopyvp(vp);
+        if (vpcopy == NULL) {
+            pairfree(&dst);
+            throw new std::bad_alloc;
+            return NULL;
+        }
+        *pDst = vpcopy;
+        pDst = &vpcopy->next;
+     }
+
+    return dst;
+}
+
 bool
-gss_eap_radius_attr_provider::getAttributeTypes(gss_eap_attr_enumeration_cb addAttribute, void *data) const
+gss_eap_radius_attr_provider::getAttributeTypes(gss_eap_attr_enumeration_cb addAttribute,
+                                                void *data) const
 {
     VALUE_PAIR *vp;
     std::vector <std::string> seen;
 
-    for (vp = m_avps; vp != NULL; vp = vp->next) {
+    for (vp = m_vps; vp != NULL; vp = vp->next) {
         gss_buffer_desc attribute;
+        char attrid[64];
+
+        /* Don't advertise attributes that are internal to the GSS-EAP mechanism */
+        if (isInternalAttributeP(vp->attribute))
+            continue;
 
         if (alreadyAddedAttributeP(seen, vp))
             continue;
 
-        attribute.value = (void *)vp->name;
-        attribute.length = strlen(vp->name);
+        snprintf(attrid, sizeof(attrid), "%s%d",
+            (char *)radiusUrnPrefix.value, vp->attribute);
+
+        attribute.value = attrid;
+        attribute.length = strlen(attrid);
 
-        if (!addAttribute(this, &attribute, data))
+        if (!addAttribute(m_manager, this, &attribute, data))
             return false;
 
         seen.push_back(std::string(vp->name));
@@ -157,125 +232,154 @@ gss_eap_radius_attr_provider::getAttributeTypes(gss_eap_attr_enumeration_cb addA
     return true;
 }
 
-void
-gss_eap_radius_attr_provider::setAttribute(int complete,
-                                           const gss_buffer_t attr,
-                                           const gss_buffer_t value)
-{
-}
-
-void
-gss_eap_radius_attr_provider::deleteAttribute(const gss_buffer_t value)
-{
-}
-
-bool
-gss_eap_radius_attr_provider::getAttribute(const gss_buffer_t attr,
-                                           int *authenticated,
-                                           int *complete,
-                                           gss_buffer_t value,
-                                           gss_buffer_t display_value,
-                                           int *more) const
+uint32_t
+getAttributeId(const gss_buffer_t attr)
 {
     OM_uint32 tmpMinor;
     gss_buffer_desc strAttr = GSS_C_EMPTY_BUFFER;
-    DICT_ATTR *d;
-    int attrid;
+    DICT_ATTR *da;
     char *s;
+    uint32_t attrid = 0;
 
-    /* XXX vendor */
+    if (attr->length < radiusUrnPrefix.length ||
+        memcmp(attr->value, radiusUrnPrefix.value, radiusUrnPrefix.length) != 0)
+        return 0;
 
+    /* need to duplicate because attr may not be NUL terminated */
     duplicateBuffer(*attr, &strAttr);
-    s = (char *)strAttr.value;
+    s = (char *)strAttr.value + radiusUrnPrefix.length;
 
-    if (isdigit(((char *)strAttr.value)[0])) {
+    if (isdigit(*s)) {
         attrid = strtoul(s, NULL, 10);
     } else {
-        d = rc_dict_findattr(m_rh, (char *)s);
-        if (d == NULL) {
-            gss_release_buffer(&tmpMinor, &strAttr);
-            return false;
-        }
-        attrid = d->value;
+        da = dict_attrbyname(s);
+        if (da != NULL)
+            attrid = da->attr;
     }
 
     gss_release_buffer(&tmpMinor, &strAttr);
 
-    return getAttribute(attrid, authenticated, complete,
-                        value, display_value, more);
+    return attrid;
 }
 
-static bool
-isPrintableAttributeP(VALUE_PAIR *vp)
+bool
+gss_eap_radius_attr_provider::setAttribute(int complete GSSEAP_UNUSED,
+                                           uint32_t attrid,
+                                           const gss_buffer_t value)
 {
-    size_t i;
+    OM_uint32 major = GSS_S_UNAVAILABLE, minor;
 
-    for (i = 0; i < sizeof(vp->strvalue); i++) {
-        if (!isprint(vp->strvalue[i]))
-            return false;
+    if (!isSecretAttributeP(attrid) &&
+        !isInternalAttributeP(attrid)) {
+        deleteAttribute(attrid);
+
+        major = gssEapRadiusAddAvp(&minor, &m_vps,
+                                   ATTRID(attrid), VENDOR(attrid), 
+                                   value);
     }
 
+    return !GSS_ERROR(major);
+}
+
+bool
+gss_eap_radius_attr_provider::setAttribute(int complete,
+                                           const gss_buffer_t attr,
+                                           const gss_buffer_t value)
+{
+    uint32_t attrid = getAttributeId(attr);
+
+    if (!attrid)
+        return false;
+
+    return setAttribute(complete, attrid, value);
+}
+
+bool
+gss_eap_radius_attr_provider::deleteAttribute(uint32_t attrid)
+{
+    if (isSecretAttributeP(attrid) || isInternalAttributeP(attrid) ||
+        pairfind(m_vps, attrid) == NULL)
+        return false;
+
+    pairdelete(&m_vps, attrid);
+
     return true;
 }
 
 bool
-gss_eap_radius_attr_provider::getAttribute(int attrid,
-                                           int vendor,
+gss_eap_radius_attr_provider::deleteAttribute(const gss_buffer_t attr)
+{
+    uint32_t attrid = getAttributeId(attr);
+
+    if (!attrid)
+        return false;
+
+    return deleteAttribute(attrid);
+}
+
+bool
+gss_eap_radius_attr_provider::getAttribute(const gss_buffer_t attr,
+                                           int *authenticated,
+                                           int *complete,
+                                           gss_buffer_t value,
+                                           gss_buffer_t display_value,
+                                           int *more) const
+{
+    uint32_t attrid;
+
+    attrid = getAttributeId(attr);
+    if (!attrid)
+        return false;
+
+    return getAttribute(attrid, authenticated, complete,
+                        value, display_value, more);
+}
+
+bool
+gss_eap_radius_attr_provider::getAttribute(uint32_t attrid,
                                            int *authenticated,
                                            int *complete,
                                            gss_buffer_t value,
                                            gss_buffer_t display_value,
                                            int *more) const
 {
-    OM_uint32 tmpMinor;
     VALUE_PAIR *vp;
-    int i = *more;
-    int max = 0;
-    char name[NAME_LENGTH + 1];
-    char displayString[AUTH_STRING_LEN + 1];
-    gss_buffer_desc valueBuf = GSS_C_EMPTY_BUFFER;
-    gss_buffer_desc displayBuf = GSS_C_EMPTY_BUFFER;
+    int i = *more, count = 0;
 
     *more = 0;
 
-    vp = rc_avpair_get(m_avps, attrid, vendor);
-    if (vp == NULL)
-        return false;
-
     if (i == -1)
         i = 0;
 
-    do {
-        if (i == max)
+    for (vp = pairfind(m_vps, attrid);
+         vp != NULL;
+         vp = pairfind(vp->next, attrid)) {
+        if (count++ == i) {
+            if (pairfind(vp->next, attrid) != NULL)
+                *more = count;
             break;
+        }
+    }
 
-        max++;
-    } while ((vp = rc_avpair_get(vp->next, attrid, vendor)) != NULL);
-
-    if (i > max)
+    if (vp == NULL && *more == 0)
         return false;
 
-    if (vp->type == PW_TYPE_STRING) {
-        valueBuf.value = (void *)vp->strvalue;
-        valueBuf.length = vp->lvalue;
-    } else {
-        valueBuf.value = (void *)&vp->lvalue;
-        valueBuf.length = 4;
-    }
+    if (value != GSS_C_NO_BUFFER) {
+        gss_buffer_desc valueBuf;
+
+        valueBuf.value = (void *)vp->vp_octets;
+        valueBuf.length = vp->length;
 
-    if (value != GSS_C_NO_BUFFER)
         duplicateBuffer(valueBuf, value);
+    }
 
-    if (display_value != GSS_C_NO_BUFFER &&
-        isPrintableAttributeP(vp)) {
-        if (rc_avpair_tostr(m_rh, vp, name, NAME_LENGTH,
-                            displayString, AUTH_STRING_LEN) != 0) {
-            gss_release_buffer(&tmpMinor, value);
-            return false;
-        }
+    if (display_value != GSS_C_NO_BUFFER) {
+        char displayString[MAX_STRING_LEN];
+        gss_buffer_desc displayBuf;
 
+        displayBuf.length = vp_prints_value(displayString,
+                                            sizeof(displayString), vp, 0);
         displayBuf.value = (void *)displayString;
-        displayBuf.length = strlen(displayString);
 
         duplicateBuffer(displayBuf, display_value);
     }
@@ -285,67 +389,90 @@ gss_eap_radius_attr_provider::getAttribute(int attrid,
     if (complete != NULL)
         *complete = true;
 
-    if (max > i)
-        *more = i;
-
     return true;
 }
 
 bool
-gss_eap_radius_attr_provider::getAttribute(int attrid,
+gss_eap_radius_attr_provider::getFragmentedAttribute(uint16_t attribute,
+                                                     uint16_t vendor,
+                                                     int *authenticated,
+                                                     int *complete,
+                                                     gss_buffer_t value) const
+{
+    OM_uint32 major, minor;
+
+    major = gssEapRadiusGetAvp(&minor, m_vps, attribute, vendor, value, TRUE);
+
+    if (authenticated != NULL)
+        *authenticated = m_authenticated;
+    if (complete != NULL)
+        *complete = true;
+
+    return !GSS_ERROR(major);
+}
+
+bool
+gss_eap_radius_attr_provider::getAttribute(uint16_t attribute,
+                                           uint16_t vendor,
                                            int *authenticated,
                                            int *complete,
                                            gss_buffer_t value,
                                            gss_buffer_t display_value,
                                            int *more) const
 {
-    return getAttribute(attrid, 0, authenticated, complete,
+
+    return getAttribute(VENDORATTR(attribute, vendor),
+                        authenticated, complete,
                         value, display_value, more);
 }
 
 gss_any_t
 gss_eap_radius_attr_provider::mapToAny(int authenticated,
-                                       gss_buffer_t type_id) const
+                                       gss_buffer_t type_id GSSEAP_UNUSED) const
 {
     if (authenticated && !m_authenticated)
         return (gss_any_t)NULL;
 
-    return (gss_any_t)copyAvps(m_avps);
+    return (gss_any_t)copyAvps(m_vps);
 }
 
 void
-gss_eap_radius_attr_provider::releaseAnyNameMapping(gss_buffer_t type_id,
+gss_eap_radius_attr_provider::releaseAnyNameMapping(gss_buffer_t type_id GSSEAP_UNUSED,
                                                     gss_any_t input) const
 {
-    rc_avpair_free((VALUE_PAIR *)input);
-}
-
-void
-gss_eap_radius_attr_provider::exportToBuffer(gss_buffer_t buffer) const
-{
-    buffer->length = 0;
-    buffer->value = NULL;
+    VALUE_PAIR *vp = (VALUE_PAIR *)input;
+    pairfree(&vp);
 }
 
 bool
-gss_eap_radius_attr_provider::initFromBuffer(const gss_eap_attr_ctx *ctx,
-                                             const gss_buffer_t buffer)
+gss_eap_radius_attr_provider::init(void)
 {
-    if (!gss_eap_attr_provider::initFromBuffer(ctx, buffer))
+    struct rs_context *radContext;
+
+    gss_eap_attr_ctx::registerProvider(ATTR_TYPE_RADIUS, createAttrContext);
+
+#if 1
+    /*
+     * This hack is necessary in order to force the loading of the global
+     * dictionary, otherwise accepting reauthentication tokens fails unless
+     * the acceptor has already accepted a normal authentication token.
+     */
+    if (rs_context_create(&radContext) != 0)
         return false;
 
-    if (!initFromGssCred(GSS_C_NO_CREDENTIAL))
+    if (rs_context_read_config(radContext, RS_CONFIG_FILE) != 0) {
+        rs_context_destroy(radContext);
         return false;
+    }
 
-    return true;
-}
+    if (rs_context_init_freeradius_dict(radContext, NULL)) {
+        rs_context_destroy(radContext);
+        return false;
+    }
+
+    rs_context_destroy(radContext);
+#endif
 
-bool
-gss_eap_radius_attr_provider::init(void)
-{
-    gss_eap_attr_ctx::registerProvider(ATTR_TYPE_RADIUS,
-                                       "urn:ietf:params:gss-eap:radius-avp",
-                                       gss_eap_radius_attr_provider::createAttrContext);
     return true;
 }
 
@@ -362,39 +489,87 @@ gss_eap_radius_attr_provider::createAttrContext(void)
 }
 
 OM_uint32
-addAvpFromBuffer(OM_uint32 *minor,
-                 rc_handle *rh,
-                 VALUE_PAIR **vp,
-                 int type,
-                 gss_buffer_t buffer)
+gssEapRadiusAddAvp(OM_uint32 *minor,
+                   VALUE_PAIR **vps,
+                   uint16_t attribute,
+                   uint16_t vendor,
+                   const gss_buffer_t buffer)
 {
-    if (rc_avpair_add(rh, vp, type, buffer->value, buffer->length, 0) == NULL) {
-        return GSS_S_FAILURE;
+    uint32_t attrid = VENDORATTR(vendor, attribute);
+    unsigned char *p = (unsigned char *)buffer->value;
+    size_t remain = buffer->length;
+
+    do {
+        VALUE_PAIR *vp;
+        size_t n = remain;
+
+        /*
+         * There's an extra byte of padding; RADIUS AVPs can only
+         * be 253 octets.
+         */
+        if (n >= MAX_STRING_LEN)
+            n = MAX_STRING_LEN - 1;
+
+        vp = paircreate(attrid, PW_TYPE_OCTETS);
+        if (vp == NULL) {
+            *minor = ENOMEM;
+            return GSS_S_FAILURE;
+        }
+
+        memcpy(vp->vp_octets, p, n);
+        vp->length = n;
+
+        pairadd(vps, vp);
+
+        p += n;
+        remain -= n;
+    } while (remain != 0);
+
+    return GSS_S_COMPLETE;
+}
+
+OM_uint32
+gssEapRadiusGetRawAvp(OM_uint32 *minor,
+                      VALUE_PAIR *vps,
+                      uint16_t attribute,
+                      uint16_t vendor,
+                      VALUE_PAIR **vp)
+{
+    uint32_t attr = VENDORATTR(vendor, attribute);
+
+    *vp = pairfind(vps, attr);
+    if (*vp == NULL) {
+        *minor = GSSEAP_NO_SUCH_ATTR;
+        return GSS_S_UNAVAILABLE;
     }
 
     return GSS_S_COMPLETE;
 }
 
 OM_uint32
-getBufferFromAvps(OM_uint32 *minor,
-                  VALUE_PAIR *vps,
-                  int type,
-                  gss_buffer_t buffer,
-                  int concat)
+gssEapRadiusGetAvp(OM_uint32 *minor,
+                   VALUE_PAIR *vps,
+                   uint16_t attribute,
+                   uint16_t vendor,
+                   gss_buffer_t buffer,
+                   int concat)
 {
     VALUE_PAIR *vp;
     unsigned char *p;
+    uint32_t attr = VENDORATTR(vendor, attribute);
 
     buffer->length = 0;
     buffer->value = NULL;
 
-    vp = rc_avpair_get(vps, type, 0);
-    if (vp == NULL)
+    vp = pairfind(vps, attr);
+    if (vp == NULL) {
+        *minor = GSSEAP_NO_SUCH_ATTR;
         return GSS_S_UNAVAILABLE;
+    }
 
     do {
-        buffer->length += vp->lvalue;
-    } while (concat && (vp = rc_avpair_get(vp->next, type, 0)) != NULL);
+        buffer->length += vp->length;
+    } while (concat && (vp = pairfind(vp->next, attr)) != NULL);
 
     buffer->value = GSSEAP_MALLOC(buffer->length);
     if (buffer->value == NULL) {
@@ -404,11 +579,11 @@ getBufferFromAvps(OM_uint32 *minor,
 
     p = (unsigned char *)buffer->value;
 
-    for (vp = rc_avpair_get(vps, type, 0);
+    for (vp = pairfind(vps, attr);
          concat && vp != NULL;
-         vp = rc_avpair_get(vp->next, type, 0)) {
-        memcpy(p, vp->strvalue, vp->lvalue);
-        p += vp->lvalue;
+         vp = pairfind(vp->next, attr)) {
+        memcpy(p, vp->vp_octets, vp->length);
+        p += vp->length;
     }
 
     *minor = 0;
@@ -416,44 +591,224 @@ getBufferFromAvps(OM_uint32 *minor,
 }
 
 OM_uint32
+gssEapRadiusFreeAvps(OM_uint32 *minor,
+                     VALUE_PAIR **vps)
+{
+    pairfree(vps);
+    *minor = 0;
+    return GSS_S_COMPLETE;
+}
+
+OM_uint32
 gssEapRadiusAttrProviderInit(OM_uint32 *minor)
 {
-    return gss_eap_radius_attr_provider::init()
-        ? GSS_S_COMPLETE : GSS_S_FAILURE;
+    if (!gss_eap_radius_attr_provider::init()) {
+        *minor = GSSEAP_RADSEC_INIT_FAILURE;
+        return GSS_S_FAILURE;
+    }
+
+    return GSS_S_COMPLETE;
 }
 
 OM_uint32
 gssEapRadiusAttrProviderFinalize(OM_uint32 *minor)
 {
     gss_eap_radius_attr_provider::finalize();
+
+    *minor = 0;
     return GSS_S_COMPLETE;
 }
 
-OM_uint32
-gssEapRadiusAllocHandle(OM_uint32 *minor,
-                        const gss_cred_id_t cred,
-                        rc_handle **pHandle)
+static JSONObject
+avpToJson(const VALUE_PAIR *vp)
 {
-    rc_handle *rh;
-    const char *config = RC_CONFIG_FILE;
+    JSONObject obj;
+
+    assert(vp->length <= MAX_STRING_LEN);
+
+    switch (vp->type) {
+    case PW_TYPE_INTEGER:
+    case PW_TYPE_IPADDR:
+    case PW_TYPE_DATE:
+        obj.set("value", vp->lvalue);
+        break;
+    case PW_TYPE_STRING:
+        obj.set("value", vp->vp_strvalue);
+        break;
+    default: {
+        char *b64;
+
+        if (base64Encode(vp->vp_octets, vp->length, &b64) < 0)
+            throw new std::bad_alloc;
+
+        obj.set("value", b64);
+        GSSEAP_FREE(b64);
+        break;
+    }
+    }
 
-    *pHandle = NULL;
+    obj.set("type", vp->attribute);
 
-    if (cred != GSS_C_NO_CREDENTIAL && cred->radiusConfigFile != NULL)
-        config = cred->radiusConfigFile;
+    return obj;
+}
 
-    rh = rc_read_config((char *)config);
-    if (rh == NULL) {
-        *minor = errno;
-        rc_config_free(rh);
-        return GSS_S_FAILURE;
+static bool
+jsonToAvp(VALUE_PAIR **pVp, JSONObject &obj)
+{
+    VALUE_PAIR *vp = NULL;
+    DICT_ATTR *da;
+    uint32_t attrid;
+
+    JSONObject type = obj["type"];
+    JSONObject value = obj["value"];
+    if (type.isnull() || value.isnull())
+        goto fail;
+
+    attrid = type.integer();
+    da = dict_attrbyvalue(attrid);
+    if (da != NULL) {
+        vp = pairalloc(da);
+    } else {
+        vp = paircreate(attrid, PW_TYPE_STRING);
+    }
+    if (vp == NULL) {
+        throw new std::bad_alloc;
+        goto fail;
     }
 
-    if (rc_read_dictionary(rh, rc_conf_str(rh, (char *)"dictionary")) != 0) {
-        *minor = errno;
-        return GSS_S_FAILURE;
+    switch (vp->type) {
+    case PW_TYPE_INTEGER:
+    case PW_TYPE_IPADDR:
+    case PW_TYPE_DATE:
+        vp->length = 4;
+        vp->lvalue = value.integer();
+        break;
+    case PW_TYPE_STRING: {
+        const char *str = value.string();
+        size_t len;
+
+        if (str == NULL || (len = strlen(str)) >= MAX_STRING_LEN)
+            goto fail;
+
+        vp->length = len;
+        memcpy(vp->vp_strvalue, str, len + 1);
+        break;
+    }
+    case PW_TYPE_OCTETS:
+    default: {
+        const char *str = value.string();
+        int len;
+
+        /* this optimization requires base64Decode only understand packed encoding */
+        if (str == NULL ||
+            strlen(str) >= BASE64_EXPAND(MAX_STRING_LEN))
+            goto fail;
+
+        len = base64Decode(str, vp->vp_octets);
+        if (len < 0)
+            goto fail;
+
+        vp->length = len;
+        vp->vp_octets[len] = '\0';
+        break;
+    }
     }
 
-    *pHandle = rh;
-    return GSS_S_COMPLETE;
+    *pVp = vp;
+
+    return true;
+
+fail:
+    if (vp != NULL)
+        pairbasicfree(vp);
+    *pVp = NULL;
+    return false;
+}
+
+const char *
+gss_eap_radius_attr_provider::name(void) const
+{
+    return "radius";
+}
+
+bool
+gss_eap_radius_attr_provider::initWithJsonObject(const gss_eap_attr_ctx *ctx,
+                                                 JSONObject &obj)
+{
+    VALUE_PAIR **pNext = &m_vps;
+
+    if (!gss_eap_attr_provider::initWithJsonObject(ctx, obj))
+        return false;
+
+    JSONObject attrs = obj["attributes"];
+    size_t nelems = attrs.size();
+
+    for (size_t i = 0; i < nelems; i++) {
+        JSONObject attr = attrs[i];
+        VALUE_PAIR *vp;
+
+        if (!jsonToAvp(&vp, attr))
+            return false;
+
+        *pNext = vp;
+        pNext = &vp->next;
+    }
+
+    return true;
+}
+
+const char *
+gss_eap_radius_attr_provider::prefix(void) const
+{
+    return "urn:ietf:params:gss-eap:radius-avp";
+}
+
+JSONObject
+gss_eap_radius_attr_provider::jsonRepresentation(void) const
+{
+    JSONObject obj, attrs = JSONObject::array();
+
+    for (VALUE_PAIR *vp = m_vps; vp != NULL; vp = vp->next) {
+        JSONObject attr = avpToJson(vp);
+        attrs.append(attr);
+    }
+
+    obj.set("attributes", attrs);
+
+    return obj;
+}
+
+time_t
+gss_eap_radius_attr_provider::getExpiryTime(void) const
+{
+    VALUE_PAIR *vp;
+
+    vp = pairfind(m_vps, PW_SESSION_TIMEOUT);
+    if (vp == NULL || vp->lvalue == 0)
+        return 0;
+
+    return time(NULL) + vp->lvalue;
+}
+
+OM_uint32
+gssEapRadiusMapError(OM_uint32 *minor,
+                     struct rs_error *err)
+{
+    int code;
+
+    assert(err != NULL);
+
+    code = rs_err_code(err, 0);
+
+    if (code == RSE_OK) {
+        *minor = 0;
+        return GSS_S_COMPLETE;
+    }
+
+    *minor = ERROR_TABLE_BASE_rse + code;
+
+    gssEapSaveStatusInfo(*minor, "%s", rs_err_msg(err));
+    rs_err_free(err);
+
+    return GSS_S_FAILURE;
 }