+ * Add some data to the initiator/acceptor conversation.
+ */
+static OM_uint32
+recordTokens(OM_uint32 *minor,
+ gss_ctx_id_t ctx,
+ gss_buffer_t tokens,
+ size_t tokensCount)
+{
+ unsigned char *buf;
+ size_t i, size, offset;
+
+ size = ctx->conversation.length;
+
+ for (i = 0; i < tokensCount; i++)
+ size += tokens[i].length;
+
+ buf = GSSEAP_REALLOC(ctx->conversation.value, size);
+ if (buf == NULL) {
+ *minor = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+
+ offset = ctx->conversation.length;
+
+ ctx->conversation.length = size;
+ ctx->conversation.value = buf;
+
+ for (i = 0; i < tokensCount; i++) {
+ memcpy(buf + offset, tokens[i].value, tokens[i].length);
+ offset += tokens[i].length;
+ }
+
+ *minor = 0;
+ return GSS_S_COMPLETE;
+}
+
+/*
+ * Record the context token header.
+ */
+OM_uint32
+gssEapRecordContextTokenHeader(OM_uint32 *minor,
+ gss_ctx_id_t ctx,
+ enum gss_eap_token_type tokType)
+{
+ unsigned char wireOidHeader[2], wireTokType[2];
+ gss_buffer_desc buffers[3];
+
+ assert(ctx->mechanismUsed != GSS_C_NO_OID);
+
+ wireOidHeader[0] = 0x06;
+ wireOidHeader[1] = ctx->mechanismUsed->length;
+ buffers[0].length = sizeof(wireOidHeader);
+ buffers[0].value = wireOidHeader;
+
+ buffers[1].length = ctx->mechanismUsed->length;
+ buffers[1].value = ctx->mechanismUsed->elements;
+
+ store_uint16_be(tokType, wireTokType);
+ buffers[2].length = sizeof(wireTokType);
+ buffers[2].value = wireTokType;
+
+ return recordTokens(minor, ctx, buffers, sizeof(buffers)/sizeof(buffers[0]));
+}
+
+/*
+ * Record an inner context token.
+ */
+OM_uint32
+gssEapRecordInnerContextToken(OM_uint32 *minor,
+ gss_ctx_id_t ctx,
+ gss_buffer_t innerToken,
+ OM_uint32 itokType)
+{
+ gss_buffer_desc buffers[2];
+ unsigned char itokHeader[ITOK_HEADER_LENGTH];
+
+ assert(innerToken != GSS_C_NO_BUFFER);
+
+ store_uint32_be(itokType, &itokHeader[0]);
+ store_uint32_be(innerToken->length, &itokHeader[4]);
+ buffers[0].length = sizeof(itokHeader);
+ buffers[0].value = itokHeader;
+
+ buffers[1] = *innerToken;
+
+ return recordTokens(minor, ctx, buffers, sizeof(buffers)/sizeof(buffers[0]));
+}
+
+OM_uint32
+gssEapVerifyContextToken(OM_uint32 *minor,
+ gss_ctx_id_t ctx,
+ const gss_buffer_t inputToken,
+ enum gss_eap_token_type tokType,
+ gss_buffer_t innerInputToken)
+{
+ OM_uint32 major;
+ size_t bodySize;
+ unsigned char *p = (unsigned char *)inputToken->value;
+ gss_OID_desc oidBuf;
+ gss_OID oid;
+ enum gss_eap_token_type actualTokType;
+ gss_buffer_desc tokenBuf;
+
+ if (ctx->mechanismUsed != GSS_C_NO_OID) {
+ oid = ctx->mechanismUsed;
+ } else {
+ oidBuf.elements = NULL;
+ oidBuf.length = 0;
+ oid = &oidBuf;
+ }
+
+ major = verifyTokenHeader(minor, oid, &bodySize, &p,
+ inputToken->length, &actualTokType);
+ if (GSS_ERROR(major))
+ return major;
+
+ if (actualTokType != tokType) {
+ *minor = GSSEAP_WRONG_TOK_ID;
+ return GSS_S_DEFECTIVE_TOKEN;
+ }
+
+ if (ctx->mechanismUsed == GSS_C_NO_OID) {
+ major = gssEapCanonicalizeOid(minor, oid, 0, &ctx->mechanismUsed);
+ if (GSS_ERROR(major))
+ return major;
+ }
+
+ innerInputToken->length = bodySize;
+ innerInputToken->value = p;
+
+ /*
+ * Add OID, tokenType, body to conversation; variable length
+ * header omitted. A better API to verifyTokenHeader would
+ * avoid this ugly pointer arithmetic. XXX FIXME
+ */
+ tokenBuf.value = p - (2 + oid->length + 2);
+ tokenBuf.length = 2 + oid->length + 2 + bodySize;
+
+ major = recordTokens(minor, ctx, &tokenBuf, 1);
+ if (GSS_ERROR(major))
+ return major;
+
+ *minor = 0;
+ return GSS_S_COMPLETE;
+}
+
+OM_uint32
+gssEapEncodeSupportedExts(OM_uint32 *minor,
+ OM_uint32 *types,
+ size_t typesCount,
+ gss_buffer_t outputToken)
+{
+ size_t i;
+ unsigned char *p;
+
+ outputToken->value = GSSEAP_MALLOC(4 * typesCount);
+ if (outputToken->value == NULL) {
+ *minor = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+ p = (unsigned char *)outputToken->value;
+
+ outputToken->length = 4 * typesCount;
+
+ for (i = 0; i < typesCount; i++) {
+ store_uint32_be(types[i], p);
+ p += 4;
+ }
+
+ *minor = 0;
+ return GSS_S_COMPLETE;
+}
+
+OM_uint32
+gssEapProcessSupportedExts(OM_uint32 *minor,
+ gss_buffer_t inputToken,
+ struct gss_eap_itok_map *map,
+ size_t mapCount,
+ OM_uint32 *flags)
+{
+ size_t i;
+ unsigned char *p;
+
+ if ((inputToken->length % 4) != 0) {
+ *minor = GSSEAP_TOK_TRUNC;
+ return GSS_S_DEFECTIVE_TOKEN;
+ }
+
+ p = (unsigned char *)inputToken->value;
+
+ for (i = 0; i < inputToken->length / 4; i++) {
+ OM_uint32 type = load_uint32_be(p);
+ size_t j;
+
+ for (j = 0; j < mapCount; j++) {
+ if (map->type == type) {
+ *flags |= map->flag;
+ break;
+ }
+ }
+
+ p += 4;
+ }
+
+ *minor = 0;
+ return GSS_S_COMPLETE;
+}
+
+/*