/*
- * Copyright (c) 2010, JANET(UK)
+ * Copyright (c) 2011, JANET(UK)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* SUCH DAMAGE.
*/
+/*
+ * RADIUS attribute provider implementation.
+ */
+
#include "gssapiP_eap.h"
-gss_eap_radius_attr_provider::gss_eap_radius_attr_provider(const gss_eap_attr_ctx *ctx,
- gss_cred_id_t gssCred,
- gss_ctx_id_t gssCtx)
- : gss_eap_attr_provider(ctx, gssCred, gssCtx)
+/* stuff that should be provided by libradsec/libfreeradius-radius */
+#define VENDORATTR(vendor, attr) (((vendor) << 16) | (attr))
+
+#ifndef ATTRID
+#define ATTRID(attr) ((attr) & 0xFFFF)
+#endif
+
+static gss_buffer_desc radiusUrnPrefix = {
+ sizeof("urn:x-radius:") - 1,
+ (void *)"urn:x-radius:"
+};
+
+static VALUE_PAIR *copyAvps(const VALUE_PAIR *src);
+
+gss_eap_radius_attr_provider::gss_eap_radius_attr_provider(void)
{
+ m_vps = NULL;
+ m_authenticated = false;
}
-gss_eap_radius_attr_provider::gss_eap_radius_attr_provider(
- const gss_eap_radius_attr_provider &src)
- : gss_eap_attr_provider(src)
+gss_eap_radius_attr_provider::~gss_eap_radius_attr_provider(void)
{
+ if (m_vps != NULL)
+ pairfree(&m_vps);
}
-gss_eap_radius_attr_provider::~gss_eap_radius_attr_provider(void)
+bool
+gss_eap_radius_attr_provider::initFromExistingContext(const gss_eap_attr_ctx *manager,
+ const gss_eap_attr_provider *ctx)
{
+ const gss_eap_radius_attr_provider *radius;
+
+ if (!gss_eap_attr_provider::initFromExistingContext(manager, ctx))
+ return false;
+
+ radius = static_cast<const gss_eap_radius_attr_provider *>(ctx);
+
+ if (radius->m_vps != NULL)
+ m_vps = copyAvps(const_cast<VALUE_PAIR *>(radius->getAvps()));
+
+ m_authenticated = radius->m_authenticated;
+
+ return true;
}
bool
-gss_eap_radius_attr_provider::getAttributeTypes(gss_eap_attr_enumeration_cb addAttribute, void *data) const
+gss_eap_radius_attr_provider::initFromGssContext(const gss_eap_attr_ctx *manager,
+ const gss_cred_id_t gssCred,
+ const gss_ctx_id_t gssCtx)
{
+ if (!gss_eap_attr_provider::initFromGssContext(manager, gssCred, gssCtx))
+ return false;
+
+ if (gssCtx != GSS_C_NO_CONTEXT) {
+ 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;
+ }
+ }
+
return true;
}
-void
+static bool
+alreadyAddedAttributeP(std::vector <std::string> &attrs, VALUE_PAIR *vp)
+{
+ for (std::vector<std::string>::const_iterator a = attrs.begin();
+ a != attrs.end();
+ ++a) {
+ if (strcmp(vp->name, (*a).c_str()) == 0)
+ return true;
+ }
+
+ 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
+{
+ VALUE_PAIR *vp;
+ std::vector <std::string> seen;
+
+ 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;
+
+ snprintf(attrid, sizeof(attrid), "%s%d",
+ (char *)radiusUrnPrefix.value, vp->attribute);
+
+ attribute.value = attrid;
+ attribute.length = strlen(attrid);
+
+ if (!addAttribute(this, &attribute, data))
+ return false;
+
+ seen.push_back(std::string(vp->name));
+ }
+
+ return true;
+}
+
+uint32_t
+getAttributeId(const gss_buffer_t attr)
+{
+ OM_uint32 tmpMinor;
+ gss_buffer_desc strAttr = GSS_C_EMPTY_BUFFER;
+ DICT_ATTR *da;
+ char *s;
+ uint32_t attrid = 0;
+
+ 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 + radiusUrnPrefix.length;
+
+ if (isdigit(*s)) {
+ attrid = strtoul(s, NULL, 10);
+ } else {
+ da = dict_attrbyname(s);
+ if (da != NULL)
+ attrid = da->attr;
+ }
+
+ gss_release_buffer(&tmpMinor, &strAttr);
+
+ return attrid;
+}
+
+bool
+gss_eap_radius_attr_provider::setAttribute(int complete GSSEAP_UNUSED,
+ uint32_t attrid,
+ const gss_buffer_t value)
+{
+ OM_uint32 major = GSS_S_UNAVAILABLE, minor;
+
+ 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);
}
-void
-gss_eap_radius_attr_provider::deleteAttribute(const gss_buffer_t 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::deleteAttribute(const gss_buffer_t attr)
+{
+ uint32_t attrid = getAttributeId(attr);
+
+ if (!attrid)
+ return false;
+
+ return deleteAttribute(attrid);
}
bool
gss_buffer_t display_value,
int *more) const
{
- return false;
+ 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(unsigned int attr,
+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
{
- return false;
+ VALUE_PAIR *vp;
+ int i = *more, count = 0;
+
+ *more = 0;
+
+ if (i == -1)
+ i = 0;
+
+ 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;
+ }
+ }
+
+ if (vp == NULL && *more == 0)
+ return false;
+
+ if (value != GSS_C_NO_BUFFER) {
+ gss_buffer_desc valueBuf;
+
+ valueBuf.value = (void *)vp->vp_octets;
+ valueBuf.length = vp->length;
+
+ duplicateBuffer(valueBuf, value);
+ }
+
+ 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;
+
+ duplicateBuffer(displayBuf, display_value);
+ }
+
+ if (authenticated != NULL)
+ *authenticated = m_authenticated;
+ if (complete != NULL)
+ *complete = true;
+
+ return true;
+}
+
+bool
+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(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_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
{
+ pairfree((VALUE_PAIR **)&input);
+}
+
+bool
+gss_eap_radius_attr_provider::init(void)
+{
+ struct rs_context *radContext;
+
+ gss_eap_attr_ctx::registerProvider(ATTR_TYPE_RADIUS,
+ "urn:ietf:params:gss-eap:radius-avp",
+ 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, RS_DICT_FILE) != 0) {
+ return false;
+ }
+
+ rs_context_destroy(radContext);
+#endif
+
+ return true;
}
void
-gss_eap_radius_attr_provider::marshall(gss_buffer_t buffer) const
+gss_eap_radius_attr_provider::finalize(void)
{
+ gss_eap_attr_ctx::unregisterProvider(ATTR_TYPE_RADIUS);
}
gss_eap_attr_provider *
-gss_eap_radius_attr_provider::unmarshall(const gss_eap_attr_ctx *ctx,
- const gss_buffer_t buffer)
+gss_eap_radius_attr_provider::createAttrContext(void)
{
+ return new gss_eap_radius_attr_provider;
+}
+
+OM_uint32
+gssEapRadiusAddAvp(OM_uint32 *minor,
+ VALUE_PAIR **vps,
+ uint16_t attribute,
+ uint16_t vendor,
+ const gss_buffer_t buffer)
+{
+ 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
+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 = pairfind(vps, attr);
+ if (vp == NULL) {
+ *minor = GSSEAP_NO_SUCH_ATTR;
+ return GSS_S_UNAVAILABLE;
+ }
+
+ do {
+ buffer->length += vp->length;
+ } while (concat && (vp = pairfind(vp->next, attr)) != NULL);
+
+ buffer->value = GSSEAP_MALLOC(buffer->length);
+ if (buffer->value == NULL) {
+ *minor = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+
+ p = (unsigned char *)buffer->value;
+
+ for (vp = pairfind(vps, attr);
+ concat && vp != NULL;
+ vp = pairfind(vp->next, attr)) {
+ memcpy(p, vp->vp_octets, vp->length);
+ p += vp->length;
+ }
+
+ *minor = 0;
+ return GSS_S_COMPLETE;
+}
+
+OM_uint32
+gssEapRadiusFreeAvps(OM_uint32 *minor,
+ VALUE_PAIR **vps)
+{
+ pairfree(vps);
+ *minor = 0;
+ return GSS_S_COMPLETE;
+}
+
+OM_uint32
+gssEapRadiusAttrProviderInit(OM_uint32 *minor)
+{
+ 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;
+}
+
+/*
+ * Encoding is:
+ * 4 octet NBO attribute ID | 4 octet attribute length | attribute data
+ */
+static size_t
+avpSize(const VALUE_PAIR *vp)
+{
+ size_t size = 4 + 1;
+
+ if (vp != NULL)
+ size += vp->length;
+
+ return size;
+}
+
+static bool
+avpExport(const VALUE_PAIR *vp,
+ unsigned char **pBuffer,
+ size_t *pRemain)
+{
+ unsigned char *p = *pBuffer;
+ size_t remain = *pRemain;
+
+ assert(remain >= avpSize(vp));
+
+ store_uint32_be(vp->attribute, p);
+
+ switch (vp->type) {
+ case PW_TYPE_INTEGER:
+ case PW_TYPE_IPADDR:
+ case PW_TYPE_DATE:
+ p[4] = 4;
+ store_uint32_be(vp->lvalue, p + 5);
+ break;
+ default:
+ assert(vp->length <= MAX_STRING_LEN);
+ p[4] = (uint8_t)vp->length;
+ memcpy(p + 5, vp->vp_octets, vp->length);
+ break;
+ }
+
+ *pBuffer += 5 + p[4];
+ *pRemain -= 5 + p[4];
+
+ return true;
+
+}
+
+static bool
+avpImport(VALUE_PAIR **pVp,
+ unsigned char **pBuffer,
+ size_t *pRemain)
+{
+ unsigned char *p = *pBuffer;
+ size_t remain = *pRemain;
+ VALUE_PAIR *vp = NULL;
+ DICT_ATTR *da;
+ uint32_t attrid;
+
+ if (remain < avpSize(NULL))
+ goto fail;
+
+ attrid = load_uint32_be(p);
+ p += 4;
+ remain -= 4;
+
+ 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 (remain < p[0])
+ goto fail;
+
+ switch (vp->type) {
+ case PW_TYPE_INTEGER:
+ case PW_TYPE_IPADDR:
+ case PW_TYPE_DATE:
+ if (p[0] != 4)
+ goto fail;
+
+ vp->length = 4;
+ vp->lvalue = load_uint32_be(p + 1);
+ p += 5;
+ remain -= 5;
+ break;
+ case PW_TYPE_STRING:
+ default:
+ if (p[0] >= MAX_STRING_LEN)
+ goto fail;
+
+ vp->length = (uint32_t)p[0];
+ memcpy(vp->vp_octets, p + 1, vp->length);
+
+ if (vp->type == PW_TYPE_STRING)
+ vp->vp_strvalue[vp->length] = '\0';
+
+ p += 1 + vp->length;
+ remain -= 1 + vp->length;
+ break;
+ }
+
+ *pVp = vp;
+ *pBuffer = p;
+ *pRemain = remain;
+
+ return true;
+
+fail:
+ if (vp != NULL)
+ pairbasicfree(vp);
+ *pVp = NULL;
+ return false;
}
bool
-gss_eap_radius_attr_provider::init(void)
+gss_eap_radius_attr_provider::initFromBuffer(const gss_eap_attr_ctx *ctx,
+ const gss_buffer_t buffer)
{
+ unsigned char *p = (unsigned char *)buffer->value;
+ size_t remain = buffer->length;
+ VALUE_PAIR **pNext = &m_vps;
+
+ if (!gss_eap_attr_provider::initFromBuffer(ctx, buffer))
+ return false;
+
+ do {
+ VALUE_PAIR *attr;
+
+ if (!avpImport(&attr, &p, &remain))
+ return false;
+
+ *pNext = attr;
+ pNext = &attr->next;
+ } while (remain != 0);
+
+ return true;
}
void
-gss_eap_radius_attr_provider::finalize(void)
+gss_eap_radius_attr_provider::exportToBuffer(gss_buffer_t buffer) const
{
+ VALUE_PAIR *vp;
+ unsigned char *p;
+ size_t remain = 0;
+
+ for (vp = m_vps; vp != NULL; vp = vp->next) {
+ remain += avpSize(vp);
+ }
+
+ buffer->value = GSSEAP_MALLOC(remain);
+ if (buffer->value == NULL) {
+ throw new std::bad_alloc;
+ return;
+ }
+ buffer->length = remain;
+
+ p = (unsigned char *)buffer->value;
+
+ for (vp = m_vps; vp != NULL; vp = vp->next) {
+ avpExport(vp, &p, &remain);
+ }
+
+ assert(remain == 0);
}
-gss_eap_attr_provider *
-gss_eap_radius_attr_provider::createAttrContext(const gss_eap_attr_ctx *ctx,
- gss_cred_id_t gssCred,
- gss_ctx_id_t gssCtx)
+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)
{
- return new gss_eap_radius_attr_provider(ctx, gssCred, gssCtx);
+ 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;
}
projects / mech_eap.git / blobdiff