最後に、test_import_export_context() は gss_export_sec_context() と gss_import_sec_context() がどのように機能するかを示す小さな関数です。この関数は実用性はなく、ここでは上記 2 つの GSS-API 関数がどのように使用されるかだけを示しています。
int test_import_export_context(context) gss_ctx_id_t *context; { OM_uint32 min_stat, maj_stat; gss_buffer_desc context_token, copied_token; struct timeval tm1, tm2; /* * 保存後、コンテキストを復元する */ gettimeofday(&tm1, (struct timezone *)0); maj_stat = gss_export_sec_context(&min_stat, context, &context_token); if (maj_stat != GSS_S_COMPLETE) { display_status("exporting context", maj_stat, min_stat); return 1; } gettimeofday(&tm2, (struct timezone *)0); if (verbose && log) fprintf(log, "Exported context: %d bytes, %7.4f seconds\n", context_token.length, timeval_subtract(&tm2, &tm1)); copied_token.length = context_token.length; copied_token.value = malloc(context_token.length); if (copied_token.value == 0) { fprintf(log, "Couldn't allocate memory to copy context token.\n"); return 1; } memcpy(copied_token.value, context_token.value, copied_token.length); maj_stat = gss_import_sec_context(&min_stat, &copied_token, context); if (maj_stat != GSS_S_COMPLETE) { display_status("importing context", maj_stat, min_stat); return 1; } gettimeofday(&tm1, (struct timezone *)0); if (verbose && log) fprintf(log, "Importing context: %7.4f seconds\n", timeval_subtract(&tm1, &tm2)); (void) gss_release_buffer(&min_stat, &context_token); return 0; } |