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Oracle Solaris 11 开发者安全性指南 Oracle Solaris 11.1 Information Library (简体中文) |
gss-client 应用程序需要首先包装(即加密)数据,然后才能将其发送。应用程序通过执行以下步骤来包装消息:
确定包装大小限制。此过程可确保协议提供经过包装的消息。
获取源和目标的名称。将名称从对象标识符转换为字符串。
获取机制名称的列表。将名称从对象标识符转换为字符串。
将消息插入到缓冲区中并对其进行包装。
将消息发送到服务器。
以下源代码可用于包装消息。
注 - 此示例的源代码也可以通过 Oracle 下载中心获取。请参见 http://www.oracle.com/technetwork/indexes/downloads/sdlc-decommission-333274.html。
示例 5-6 gss-client 示例:call_server()-包装消息
/* Test gss_wrap_size_limit */ maj_stat = gss_wrap_size_limit(&min_stat, context, conf_req_flag, GSS_C_QOP_DEFAULT, req_output_size, &max_input_size); if (maj_stat != GSS_S_COMPLETE) { display_status("wrap_size_limit call", maj_stat, min_stat); } else fprintf (stderr, "gss_wrap_size_limit returned " "max input size = %d \n" "for req_output_size = %d with Integrity only\n", max_input_size , req_output_size , conf_req_flag); conf_req_flag = 1; maj_stat = gss_wrap_size_limit(&min_stat, context, conf_req_flag, GSS_C_QOP_DEFAULT, req_output_size, &max_input_size); if (maj_stat != GSS_S_COMPLETE) { display_status("wrap_size_limit call", maj_stat, min_stat); } else fprintf (stderr, "gss_wrap_size_limit returned " " max input size = %d \n" "for req_output_size = %d with " "Integrity & Privacy \n", max_input_size , req_output_size ); maj_stat = gss_display_name(&min_stat, src_name, &sname, &name_type); if (maj_stat != GSS_S_COMPLETE) { display_status("displaying source name", maj_stat, min_stat); return -1; } maj_stat = gss_display_name(&min_stat, targ_name, &tname, (gss_OID *) NULL); if (maj_stat != GSS_S_COMPLETE) { display_status("displaying target name", maj_stat, min_stat); return -1; } fprintf(stderr, "\"%.*s\" to \"%.*s\", lifetime %u, flags %x, %s, %s\n", (int) sname.length, (char *) sname.value, (int) tname.length, (char *) tname.value, lifetime, context_flags, (is_local) ? "locally initiated" : "remotely initiated", (is_open) ? "open" : "closed"); (void) gss_release_name(&min_stat, &src_name); (void) gss_release_name(&min_stat, &targ_name); (void) gss_release_buffer(&min_stat, &sname); (void) gss_release_buffer(&min_stat, &tname); maj_stat = gss_oid_to_str(&min_stat, name_type, &oid_name); if (maj_stat != GSS_S_COMPLETE) { display_status("converting oid->string", maj_stat, min_stat); return -1; } fprintf(stderr, "Name type of source name is %.*s.\n", (int) oid_name.length, (char *) oid_name.value); (void) gss_release_buffer(&min_stat, &oid_name); /* Now get the names supported by the mechanism */ maj_stat = gss_inquire_names_for_mech(&min_stat, mechanism, &mech_names); if (maj_stat != GSS_S_COMPLETE) { display_status("inquiring mech names", maj_stat, min_stat); return -1; } maj_stat = gss_oid_to_str(&min_stat, mechanism, &oid_name); if (maj_stat != GSS_S_COMPLETE) { display_status("converting oid->string", maj_stat, min_stat); return -1; } mechStr = (char *)__gss_oid_to_mech(mechanism); fprintf(stderr, "Mechanism %.*s (%s) supports %d names\n", (int) oid_name.length, (char *) oid_name.value, (mechStr == NULL ? "NULL" : mechStr), mech_names->count); (void) gss_release_buffer(&min_stat, &oid_name); for (i=0; i < mech_names->count; i++) { maj_stat = gss_oid_to_str(&min_stat, &mech_names->elements[i], &oid_name); if (maj_stat != GSS_S_COMPLETE) { display_status("converting oid->string", maj_stat, min_stat); return -1; } fprintf(stderr, " %d: %.*s\n", i, (int) oid_name.length, ( char *) oid_name.value); (void) gss_release_buffer(&min_stat, &oid_name); } (void) gss_release_oid_set(&min_stat, &mech_names); if (use_file) { read_file(msg, &in_buf); } else { /* Wrap the message */ in_buf.value = msg; in_buf.length = strlen(msg) + 1; } if (ret_flag & GSS_C_CONF_FLAG) { state = 1; else state = 0; } maj_stat = gss_wrap(&min_stat, context, 1, GSS_C_QOP_DEFAULT, &in_buf, &state, &out_buf); if (maj_stat != GSS_S_COMPLETE) { display_status("wrapping message", maj_stat, min_stat); (void) close(s); (void) gss_delete_sec_context(&min_stat, &context, GSS_C_NO_BUFFER); return -1; } else if (! state) { fprintf(stderr, "Warning! Message not encrypted.\n"); } /* Send to server */ if (send_token(s, &out_buf) < 0) { (void) close(s); (void) gss_delete_sec_context(&min_stat, &context, GSS_C_NO_BUFFER); return -1; } (void) gss_release_buffer(&min_stat, &out_buf);