2 * Copyright (c) 2011, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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10 * notice, this list of conditions and the following disclaimer.
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14 * documentation and/or other materials provided with the distribution.
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17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Deserialise a context handle.
37 #include "gssapiP_eap.h"
39 #define UPDATE_REMAIN(n) do { \
44 #define CHECK_REMAIN(n) do { \
46 *minor = GSSEAP_TOK_TRUNC; \
47 return GSS_S_DEFECTIVE_TOKEN; \
52 importPartialRadiusContext(OM_uint32 *minor,
58 unsigned char *p = *pBuf;
59 size_t remain = *pRemain;
63 /* Selected RADIUS server */
65 serverLen = load_uint32_be(p);
69 CHECK_REMAIN(serverLen);
71 ctx->acceptorCtx.radServer = GSSEAP_MALLOC(serverLen + 1);
72 if (ctx->acceptorCtx.radServer == NULL) {
76 memcpy(ctx->acceptorCtx.radServer, p, serverLen);
77 ctx->acceptorCtx.radServer[serverLen] = '\0';
79 UPDATE_REMAIN(serverLen);
82 /* RADIUS state blob */
84 buf.length = load_uint32_be(p);
87 if (buf.length != 0) {
88 CHECK_REMAIN(buf.length);
92 major = duplicateBuffer(minor, &buf, &ctx->acceptorCtx.state);
96 UPDATE_REMAIN(buf.length);
102 return GSS_S_COMPLETE;
106 importMechanismOid(OM_uint32 *minor,
107 unsigned char **pBuf,
112 unsigned char *p = *pBuf;
113 size_t remain = *pRemain;
116 oidBuf.length = load_uint32_be(p);
117 if (remain < 4 + oidBuf.length || oidBuf.length == 0) {
118 *minor = GSSEAP_TOK_TRUNC;
119 return GSS_S_DEFECTIVE_TOKEN;
122 oidBuf.elements = &p[4];
124 major = gssEapCanonicalizeOid(minor, &oidBuf, 0, pOid);
125 if (GSS_ERROR(major))
128 *pBuf += 4 + oidBuf.length;
129 *pRemain -= 4 + oidBuf.length;
132 return GSS_S_COMPLETE;
136 importKerberosKey(OM_uint32 *minor,
137 unsigned char **pBuf,
139 krb5_cksumtype *checksumType,
140 krb5_enctype *pEncryptionType,
143 unsigned char *p = *pBuf;
144 size_t remain = *pRemain;
145 OM_uint32 encryptionType;
150 *minor = GSSEAP_TOK_TRUNC;
151 return GSS_S_DEFECTIVE_TOKEN;
154 *checksumType = load_uint32_be(&p[0]);
155 encryptionType = load_uint32_be(&p[4]);
156 length = load_uint32_be(&p[8]);
158 if ((length != 0) != (encryptionType != ENCTYPE_NULL)) {
159 *minor = GSSEAP_BAD_CONTEXT_TOKEN;
160 return GSS_S_DEFECTIVE_TOKEN;
163 if (remain - 12 < length) {
164 *minor = GSSEAP_TOK_TRUNC;
165 return GSS_S_DEFECTIVE_TOKEN;
168 if (load_buffer(&p[12], length, &tmp) == NULL) {
170 return GSS_S_FAILURE;
173 KRB_KEY_TYPE(key) = encryptionType;
174 KRB_KEY_LENGTH(key) = tmp.length;
175 KRB_KEY_DATA(key) = (unsigned char *)tmp.value;
177 *pBuf += 12 + length;
178 *pRemain -= 12 + length;
179 *pEncryptionType = encryptionType;
182 return GSS_S_COMPLETE;
186 importName(OM_uint32 *minor,
187 unsigned char **pBuf,
192 unsigned char *p = *pBuf;
193 size_t remain = *pRemain;
197 *minor = GSSEAP_TOK_TRUNC;
198 return GSS_S_DEFECTIVE_TOKEN;
201 tmp.length = load_uint32_be(p);
202 if (tmp.length != 0) {
203 if (remain - 4 < tmp.length) {
204 *minor = GSSEAP_TOK_TRUNC;
205 return GSS_S_DEFECTIVE_TOKEN;
210 major = gssEapImportNameInternal(minor, &tmp, pName,
211 EXPORT_NAME_FLAG_COMPOSITE);
212 if (GSS_ERROR(major))
216 *pBuf += 4 + tmp.length;
217 *pRemain -= 4 + tmp.length;
220 return GSS_S_COMPLETE;
224 importConversation(OM_uint32 *minor,
225 unsigned char **pBuf,
230 unsigned char *p = *pBuf;
231 size_t remain = *pRemain;
235 *minor = GSSEAP_TOK_TRUNC;
236 return GSS_S_DEFECTIVE_TOKEN;
239 tmp.length = load_uint32_be(p);
240 if (tmp.length == 0 ||
241 remain - 4 < tmp.length) {
242 *minor = GSSEAP_TOK_TRUNC;
243 return GSS_S_DEFECTIVE_TOKEN;
247 *minor = GSSEAP_BAD_TOK_HEADER;
248 return GSS_S_DEFECTIVE_TOKEN;
253 major = duplicateBuffer(minor, &tmp, &ctx->conversation);
254 if (GSS_ERROR(major))
257 *pBuf += 4 + tmp.length;
258 *pRemain -= 4 + tmp.length;
261 return GSS_S_COMPLETE;
265 gssEapImportContext(OM_uint32 *minor,
270 unsigned char *p = (unsigned char *)token->value;
271 size_t remain = token->length;
274 *minor = GSSEAP_TOK_TRUNC;
275 return GSS_S_DEFECTIVE_TOKEN;
277 if (load_uint32_be(&p[0]) != EAP_EXPORT_CONTEXT_V1) {
278 *minor = GSSEAP_BAD_CONTEXT_TOKEN;
279 return GSS_S_DEFECTIVE_TOKEN;
281 ctx->state = load_uint32_be(&p[4]);
282 ctx->flags = load_uint32_be(&p[8]);
283 ctx->gssFlags = load_uint32_be(&p[12]);
288 if (GSSEAP_SM_STATE(ctx) < GSSEAP_STATE_INITIAL ||
289 GSSEAP_SM_STATE(ctx) > GSSEAP_STATE_ESTABLISHED)
290 return GSS_S_DEFECTIVE_TOKEN;
292 /* Only acceptor can export partial context tokens */
293 if (CTX_IS_INITIATOR(ctx) && !CTX_IS_ESTABLISHED(ctx))
294 return GSS_S_DEFECTIVE_TOKEN;
296 major = importMechanismOid(minor, &p, &remain, &ctx->mechanismUsed);
297 if (GSS_ERROR(major))
300 major = importKerberosKey(minor, &p, &remain,
302 &ctx->encryptionType,
304 if (GSS_ERROR(major))
307 major = importName(minor, &p, &remain, &ctx->initiatorName);
308 if (GSS_ERROR(major))
311 major = importName(minor, &p, &remain, &ctx->acceptorName);
312 if (GSS_ERROR(major))
315 /* Check that, if context is established, names are valid */
316 if (CTX_IS_ESTABLISHED(ctx) &&
317 (CTX_IS_INITIATOR(ctx) ? ctx->acceptorName == GSS_C_NO_NAME
318 : ctx->initiatorName == GSS_C_NO_NAME)) {
319 return GSS_S_DEFECTIVE_TOKEN;
322 if (remain < 24 + sequenceSize(ctx->seqState)) {
323 *minor = GSSEAP_TOK_TRUNC;
324 return GSS_S_DEFECTIVE_TOKEN;
326 ctx->expiryTime = (time_t)load_uint64_be(&p[0]);
327 ctx->sendSeq = load_uint64_be(&p[8]);
328 ctx->recvSeq = load_uint64_be(&p[16]);
332 major = sequenceInternalize(minor, &ctx->seqState, &p, &remain);
333 if (GSS_ERROR(major))
337 * The partial context should only be expected for unestablished
340 if (!CTX_IS_INITIATOR(ctx) && !CTX_IS_ESTABLISHED(ctx)) {
341 major = importConversation(minor, &p, &remain, ctx);
342 if (GSS_ERROR(major))
345 if ((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0) {
346 major = importPartialRadiusContext(minor, &p, &remain, ctx);
347 if (GSS_ERROR(major))
356 major = GSS_S_COMPLETE;
363 gss_import_sec_context(OM_uint32 *minor,
364 gss_buffer_t interprocess_token,
365 gss_ctx_id_t *context_handle)
367 OM_uint32 major, tmpMinor;
368 gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
370 *context_handle = GSS_C_NO_CONTEXT;
372 if (interprocess_token == GSS_C_NO_BUFFER ||
373 interprocess_token->length == 0) {
374 *minor = GSSEAP_TOK_TRUNC;
375 return GSS_S_DEFECTIVE_TOKEN;
378 major = gssEapAllocContext(minor, &ctx);
379 if (GSS_ERROR(major))
382 major = gssEapImportContext(minor, interprocess_token, ctx);
383 if (GSS_ERROR(major))
386 *context_handle = ctx;
389 if (GSS_ERROR(major))
390 gssEapReleaseContext(&tmpMinor, &ctx);