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34 * Serialise a security context. On the acceptor, this may be partially
38 #include "gssapiP_eap.h"
40 #ifdef GSSEAP_ENABLE_ACCEPTOR
42 gssEapExportPartialContext(OM_uint32 *minor,
46 OM_uint32 major, tmpMinor;
47 size_t length, serverLen = 0;
49 char serverBuf[MAXHOSTNAMELEN];
50 if (ctx->acceptorCtx.radConn != NULL) {
51 if (rs_conn_get_current_peer(ctx->acceptorCtx.radConn,
52 serverBuf, sizeof(serverBuf)) != 0) {
54 return gssEapRadiusMapError(minor,
55 rs_err_conn_pop(ctx->acceptorCtx.radConn));
57 serverBuf[0] = '\0'; /* not implemented yet */
60 serverLen = strlen(serverBuf);
62 length = 4 + serverLen + 4 + ctx->acceptorCtx.state.length;
64 token->value = GSSEAP_MALLOC(length);
65 if (token->value == NULL) {
66 major = GSS_S_FAILURE;
70 token->length = length;
72 p = (unsigned char *)token->value;
74 store_uint32_be(serverLen, p);
77 memcpy(p, serverBuf, serverLen);
81 store_uint32_be(ctx->acceptorCtx.state.length, p);
83 if (ctx->acceptorCtx.state.length != 0) {
84 memcpy(p, ctx->acceptorCtx.state.value,
85 ctx->acceptorCtx.state.length);
86 p += ctx->acceptorCtx.state.length;
89 GSSEAP_ASSERT(p == (unsigned char *)token->value + token->length);
91 major = GSS_S_COMPLETE;
96 gss_release_buffer(&tmpMinor, token);
100 #endif /* GSSEAP_ENABLE_ACCEPTOR */
103 gssEapExportSecContext(OM_uint32 *minor,
107 OM_uint32 major, tmpMinor;
109 gss_buffer_desc initiatorName = GSS_C_EMPTY_BUFFER;
110 gss_buffer_desc acceptorName = GSS_C_EMPTY_BUFFER;
111 gss_buffer_desc partialCtx = GSS_C_EMPTY_BUFFER;
115 if ((CTX_IS_INITIATOR(ctx) && !CTX_IS_ESTABLISHED(ctx)) ||
116 ctx->mechanismUsed == GSS_C_NO_OID) {
117 *minor = GSSEAP_CONTEXT_INCOMPLETE;
118 return GSS_S_NO_CONTEXT;
121 key.length = KRB_KEY_LENGTH(&ctx->rfc3961Key);
122 key.value = KRB_KEY_DATA(&ctx->rfc3961Key);
125 * As a shortcut, we omit the mechanism OID of the initiator name because
126 * we know it will match the context mechanism. The acceptor name mech OID
127 * is always included.
129 if (ctx->initiatorName != GSS_C_NO_NAME) {
130 major = gssEapExportNameInternal(minor, ctx->initiatorName,
132 EXPORT_NAME_FLAG_COMPOSITE);
133 if (GSS_ERROR(major))
137 if (ctx->acceptorName != GSS_C_NO_NAME) {
138 major = gssEapExportNameInternal(minor, ctx->acceptorName,
140 EXPORT_NAME_FLAG_OID | EXPORT_NAME_FLAG_COMPOSITE);
141 if (GSS_ERROR(major))
145 #ifdef GSSEAP_ENABLE_ACCEPTOR
147 * The partial context is only transmitted for unestablished acceptor
150 if (!CTX_IS_INITIATOR(ctx) && !CTX_IS_ESTABLISHED(ctx) &&
151 (ctx->flags & CTX_FLAG_KRB_REAUTH) == 0) {
152 major = gssEapExportPartialContext(minor, ctx, &partialCtx);
153 if (GSS_ERROR(major))
158 length = 16; /* version, state, flags, */
159 length += 4 + ctx->mechanismUsed->length; /* mechanismUsed */
160 length += 12 + key.length; /* rfc3961Key.value */
161 length += 4 + initiatorName.length; /* initiatorName.value */
162 length += 4 + acceptorName.length; /* acceptorName.value */
163 length += 24 + sequenceSize(ctx->seqState); /* seqState */
165 if (partialCtx.value != NULL)
166 length += 4 + partialCtx.length; /* partialCtx.value */
168 token->value = GSSEAP_MALLOC(length);
169 if (token->value == NULL) {
170 major = GSS_S_FAILURE;
174 token->length = length;
176 p = (unsigned char *)token->value;
178 store_uint32_be(EAP_EXPORT_CONTEXT_V1, &p[0]); /* version */
179 store_uint32_be(GSSEAP_SM_STATE(ctx), &p[4]);
180 store_uint32_be(ctx->flags, &p[8]);
181 store_uint32_be(ctx->gssFlags, &p[12]);
182 p = store_oid(ctx->mechanismUsed, &p[16]);
184 store_uint32_be(ctx->checksumType, &p[0]);
185 store_uint32_be(ctx->encryptionType, &p[4]);
186 p = store_buffer(&key, &p[8], FALSE);
188 p = store_buffer(&initiatorName, p, FALSE);
189 p = store_buffer(&acceptorName, p, FALSE);
191 store_uint64_be(ctx->expiryTime, &p[0]);
192 store_uint64_be(ctx->sendSeq, &p[8]);
193 store_uint64_be(ctx->recvSeq, &p[16]);
196 major = sequenceExternalize(minor, ctx->seqState, &p, &length);
197 if (GSS_ERROR(major))
200 if (partialCtx.value != NULL)
201 p = store_buffer(&partialCtx, p, FALSE);
203 GSSEAP_ASSERT(p == (unsigned char *)token->value + token->length);
205 major = GSS_S_COMPLETE;
209 if (GSS_ERROR(major))
210 gss_release_buffer(&tmpMinor, token);
211 gss_release_buffer(&tmpMinor, &initiatorName);
212 gss_release_buffer(&tmpMinor, &acceptorName);
213 gss_release_buffer(&tmpMinor, &partialCtx);
218 OM_uint32 GSSAPI_CALLCONV
219 gss_export_sec_context(OM_uint32 *minor,
220 gss_ctx_id_t *context_handle,
221 gss_buffer_t interprocess_token)
223 OM_uint32 major, tmpMinor;
224 gss_ctx_id_t ctx = *context_handle;
226 interprocess_token->length = 0;
227 interprocess_token->value = NULL;
229 if (ctx == GSS_C_NO_CONTEXT) {
231 return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_NO_CONTEXT;
236 GSSEAP_MUTEX_LOCK(&ctx->mutex);
238 major = gssEapExportSecContext(minor, ctx, interprocess_token);
239 if (GSS_ERROR(major)) {
240 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
244 *context_handle = GSS_C_NO_CONTEXT;
246 GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
248 gssEapReleaseContext(&tmpMinor, &ctx);
250 return GSS_S_COMPLETE;