2 * Copyright (c) 2011, JANET(UK)
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20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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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
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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 gssEapImportPartialContext(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 gssEapImportContext(OM_uint32 *minor,
229 unsigned char *p = (unsigned char *)token->value;
230 size_t remain = token->length;
233 *minor = GSSEAP_TOK_TRUNC;
234 return GSS_S_DEFECTIVE_TOKEN;
236 if (load_uint32_be(&p[0]) != EAP_EXPORT_CONTEXT_V1) {
237 *minor = GSSEAP_BAD_CONTEXT_TOKEN;
238 return GSS_S_DEFECTIVE_TOKEN;
240 ctx->state = load_uint32_be(&p[4]);
241 ctx->flags = load_uint32_be(&p[8]);
242 ctx->gssFlags = load_uint32_be(&p[12]);
247 if (GSSEAP_SM_STATE(ctx) < GSSEAP_STATE_INITIAL ||
248 GSSEAP_SM_STATE(ctx) > GSSEAP_STATE_ESTABLISHED)
249 return GSS_S_DEFECTIVE_TOKEN;
251 /* Only acceptor can export partial context tokens */
252 if (CTX_IS_INITIATOR(ctx) && !CTX_IS_ESTABLISHED(ctx))
253 return GSS_S_DEFECTIVE_TOKEN;
255 major = importMechanismOid(minor, &p, &remain, &ctx->mechanismUsed);
256 if (GSS_ERROR(major))
259 major = importKerberosKey(minor, &p, &remain,
261 &ctx->encryptionType,
263 if (GSS_ERROR(major))
266 major = importName(minor, &p, &remain, &ctx->initiatorName);
267 if (GSS_ERROR(major))
270 major = importName(minor, &p, &remain, &ctx->acceptorName);
271 if (GSS_ERROR(major))
274 /* Check that, if context is established, names are valid */
275 if (CTX_IS_ESTABLISHED(ctx) &&
276 (CTX_IS_INITIATOR(ctx) ? ctx->acceptorName == GSS_C_NO_NAME
277 : ctx->initiatorName == GSS_C_NO_NAME)) {
278 return GSS_S_DEFECTIVE_TOKEN;
281 if (remain < 24 + sequenceSize(ctx->seqState)) {
282 *minor = GSSEAP_TOK_TRUNC;
283 return GSS_S_DEFECTIVE_TOKEN;
285 ctx->expiryTime = (time_t)load_uint64_be(&p[0]);
286 ctx->sendSeq = load_uint64_be(&p[8]);
287 ctx->recvSeq = load_uint64_be(&p[16]);
291 major = sequenceInternalize(minor, &ctx->seqState, &p, &remain);
292 if (GSS_ERROR(major))
296 * The partial context should only be expected for unestablished
299 if (!CTX_IS_INITIATOR(ctx) && !CTX_IS_ESTABLISHED(ctx)) {
300 assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
302 major = gssEapImportPartialContext(minor, &p, &remain, ctx);
303 if (GSS_ERROR(major))
311 major = GSS_S_COMPLETE;
318 gss_import_sec_context(OM_uint32 *minor,
319 gss_buffer_t interprocess_token,
320 gss_ctx_id_t *context_handle)
322 OM_uint32 major, tmpMinor;
323 gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
325 *context_handle = GSS_C_NO_CONTEXT;
327 if (interprocess_token == GSS_C_NO_BUFFER ||
328 interprocess_token->length == 0) {
329 *minor = GSSEAP_TOK_TRUNC;
330 return GSS_S_DEFECTIVE_TOKEN;
333 major = gssEapAllocContext(minor, &ctx);
334 if (GSS_ERROR(major))
337 major = gssEapImportContext(minor, interprocess_token, ctx);
338 if (GSS_ERROR(major))
341 *context_handle = ctx;
344 if (GSS_ERROR(major))
345 gssEapReleaseContext(&tmpMinor, &ctx);