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1st April 2021 - ICS V8.66 released includes support for Delphi 10.4 Sydney
26th March 2021 - OpenSSL 1.1.1k Windows binaries released
7th July 2020 - Updated PEM Bundle CA Trusted Store Files
There is a new ICS support forum at https://en.delphipraxis.net/forum/37-ics-internet-component-suite/ to replace the old TWSocket mailing that has stopped working.
This page contains various components written by Magenta Systems Ltd to extend the François Piette's Internet Component Suite (ICS) version 8 from http://www.overbyte.eu/. ICS v8 supports Delphi 7, 2006 to 2010, XE to XE8, 10 Seattle, 10.1 Berlin, 10.2 Tokyo, 10.3 Rio and 10.4 Sydney. Note that all ICS versions now include SSL free of charge.
The latest versions of ICS may be downloaded from the ICS SubVersion server using a subversion client such as TortoiseSVN. Once your SVN client is installed, you can browse to svn://svn.overbyte.be/ics, svn://svn.magsys.co.uk/ics or https://svn.overbyte.be/svn/ics or https://svn.magsys.co.uk/svn/ics. The SVN login user code is ics and password is ics for read access.
All ICS files should normally be accessed from the ICS Download Wiki page but the important files are available here as well.
Major Changes in ICS V8.66 include:
1 - Added a new TIcsInetAlive component to check for IPv4 and/or IPv6 internet connectivity, using Ping and/or HTTP, defaulting to www.msftconnecttest.com run by Microsoft for Windows 10 alive checking. The online and offline check intervals may be set, and event fires when online state changes. Sample OverbyteIcsHttpRestTst has a demo for new component.
2 - OpenSSL 1.0.2 and 1.1.0 ceased security fix support over 12 months ago so ICS now only supports 1.1.1, with 3.0 support due in the next few months.This removes a lot of legacy code and functions, and several old ICS functions needed for backward compatibility.
3 - Undertook a major clean-up of OpenSSL functions that may require end user application changes if low level OpenSSL functions have been used, hopefully very rarely. All OpenSSL functions have been renamed to their original names removing ICS f_ prefix for commonality with other Delphi applications.
4 - Bring server SSL/TLS security levels up to latest Mozilla recommendations. In 2021 Mozilla now recommends TLSv1.3 as modern ciphers and TLSv1.2/1.3 as Intermediate supporting all browsers from last five years, so IcsHosts now use sslCiphersMozillaSrvTLS12 as Intermediate level, also Mozilla recommends no cipher server preference so changed that.
5 - Added support for YuOpenSSL which provides OpenSSL in a pre-built DCU statically linked into applications, rather than using external OpenSSL DLLs. This make application distribution more reliable since it can no fail by users deleting the DLLs or copying incompatible versions into the directory. YuOpenSSL is a commercial product from https://www.yunqa.de/ and is supplied as separate compiled DCUs for Delphi 5 to 10.4.
6 - Added a better way of configuring Socks proxy and HTTP Tunnel proxy settings in TWSocket, similarly to that added for THttpCli in V8.62. The new ProxyURL property sets SOCKS or HTTP Tunnel proxy settings using a single URL, ie proto://[user:password@]host:port where proto is socks5 or http.
7 - TIcsRestEmail has new OAAuthType property and event for OAuth2 browser URL perhaps via email for servers. TIcsRestEmail now sets OAuth2 errors, and clears old tokens.
8 - TIcsHttpMulti has a new ParseLevels property that follow links on a parsed web page to lower level pages, which are also parsed, looking for files to download with a specific file extension, ie .avi.
9 - Updated to OpenSSL 1.1.1k with two high security fixes.
More detailed release notes are at ICS 8.66 Release Notes
Major Changes in ICS V8.65 include:
1 - The ReadMe8.txt file has a new 'Getting Started with ICS' section
listing the types of projects ICS may be used for, and suggesting the
correct components to use, and their related sample applications for
testing. This is recommended reading for anyone doing new ICS development
since it discusses all the new high level components like TSslHttpRest added
in the last few years which can reduce development effort considerably. It
may also be viewed at:
Major Changes in ICS V8.64 include:
Major Changes in ICS V8.63 include:
Major Changes in ICS V8.62 include:
Major Changes in ICS V8.61 include:
Major changes in ICS V8.60 include:
1 - Added several new components and sample applications created by Magenta Systems Ltd over the past 17 years and previously distributed and installed separately to the ICS distribution. Bundling them with ICS makes installation and updating easier, and allows existing ICS samples to make use of many the new components, such as UTF-8 file logging. All the components have new names so existing applications using the originally distributed versions will still work, but it's recommended updating existing applications for the new ICS versions. The added components include IP stream logging, SMTP Mail Queue, Time Server and Client, Whois client, blacklisting of malicious IP addresses, file logging functions, file indexing, copying and deleting, FTP indexing, multiple file uploading and downloading, HTTP page parsing and URL downloading.
2 - In THttpCli, only follow relocation for 3xx response codes, not 201 Created, but keep Location property for 201 which is often response to a POST and may be needed by the application.
3 - When starting TWSocket Connect, the IP address chosen for DNS lookup is now saved in ASCII as AddrResolvedStr which is useful in connect OK or failed events to see whether an IPV4 or IPv6 address was chosen, and which was used if DNS offered multiple IPs. AddrResolvedStr is exposed as a property in TWSocket, THttpCli, TSslHttpRest and TFFtpClient and reports in failed connection events. Other clients will be added soon.
4 - Various samples have been updated to ease testing of IPv6 and to save the diagnostic window activity to a disk log file, OverbyteIcsHttpsTst, OverbyteIcsHttpRestTst, OverbyteIcsTimeTst, OverbyteIcsX509CertsTst.
5 - Added round robin DNS lookup if DNSLookup returns multiple IP addresses, so they are used in turn after a failure when a component is called repeatedly without being freed. This is implemented in THttpCli, TSslHttpRest TFFtpClient and TIcsTimeClient. Other clients will be added soon. There is a new OnSelectDns event to override round robin lookup and make your own choice.
By default, the DNS lookup in ICS components ignores IPv6 addresses and always use the first IPv4 address offered, when there is more than one. This is usually implemented in the OnDnsLookupDone event in the application or high level component. So if that first address does not respond, the application never tries any other addresses.
This has become more of a problem when enabling applications for IPv6, by changing SocketFamily from the default sfIPv4, to sfAny, sfAnyIPv4 (prefer IPv4), sfAnyIPv6 (prefer IPV6) or sfIPv6 (only IPv6), when IPv6 addresses may also be returned as well as IPv4. Due to routing or firewall issues, IPv4 and IPv6 might not both be available and so connection will fail if that address is chosen first. Previously it was necessary to restrict SocketFamily so only the working family is attempted.
The DNS round robin implementation relies on keeping the last successful connected IP address, so it can be re-used for subsequent connections, but looping through any alternative addresses if the last connection failed, for subsequent connection attempts. Most existing applications use the OnDnsDone event to select the connection IP address so the round robin code is added there.
Newer applications making use of TWSocket ComponentOptions wsoAsyncDnsLookup should added code in OnDNSLookupDone and update the DnsResult property which is then used by Connect.
6 - IcsHosts supports two new TSslSrvSecurity server security levels, sslSrvSecTls12Less and sslSrvSecTls13Only, the former disables TLS1.3 in ICS servers if TLSv1.3 fails (perhaps a bad client implementation) while the second only supports TLSv1.3.
7 - Up to date C++ packages are included for 10.2 Tokyo and 10.3 Rio. Information on installing ICS for C++ 2007 may be found at: https://en.delphipraxis.net/topic/844-use-ics-with-c-builder-2007/ Sorry, currently don't believe it's easy to update the ICS source code to avoid the changes needed for C++ 2007.
Nightly ICS v8 for Delphi 7-2010, XE-XE8,
10 Seattle, 10,1 Berlin, 10.2 Tokyo, 10.3 Rio and 10.4 Sydney
OpenSSL Binaries 1.1.1 Win32
OpenSSL Binaries 1.0.2 Win32
Sources of CA Trusted Stores
SSL/TLS trusted root certificate bundles and always changing, annually perhaps for major changes, although Microsoft officially Windows roots every two months. The Common CA Database (CCADB) https://www.ccadb.org/ is a repository of information about Certificate Authorities (CAs), and is used by a number of different root store operators to manage their root stores.
But it's not easy to create root bundles from CCADB and another developer got frustrated with updating roots, and created a Trust Stores Observatory Git repository: https://github.com/nabla-c0d3/trust_stores_observatory which contains over 500 root certificates and lists of which trust store contain which roots by different operating systems. But even this does not contain certificates in a form easily used by OpenSSL, so Magenta Systems Ltd has written a small tool that converts the YAML files from TSO into PEM bundle files, one each for the different operating systems.
New PEM Bundle CA Trusted Store Files
There are six different PEM CA bundle files, built from the Trust Stores Observatory Git repository:
apple.pem - 178 Certificates
Each certificate is prefixed by it's description, issuer fields, expiry, public key type and SHA256 hash, so the bundles are self documenting rather than being just cryptic base64 blocks. These PEM bundles may be loaded into an OpenSSL context as a root store. Magenta Systems Ltd will periodically update these bundles, as needed. The files are all UTF-8 with a BOM. While the certificates are base64 encoded, the aded comments may include Unicode characters for non-English issuers.
The zip file contains two versions of each bundle, the name above and one ending with -clean.pem which omits all the added textual comments so is smaller and less likely to cause problems with non-English characters. There are also -titles.txt and fprints.txt files which are one line per certificate listing the main details, and fingerprint in the latter file.
Note the ICS distribution download (see above) contains three CA Trusted Stores, two as PEM bundle files, one in a source unit, and access to the Window Certificate Store directly, see FAQ_SSL/TLS_Certificate_Authority_Root_Stores for more information.
Now part of ICS V8.60 and later, as TIcsMailQueue
Magenta Systems Mail Queue Component
Magenta Systems Mail Queue Component has two main benefits over a simple TSslSmtpCli component: it supports extended retries over many hours or days, and supports multiple SMTP relay servers or looks-up MX servers, while alleviating the need for the application to handle retries. The component also allows HTML mail to be sent using SSL, something THtmlSmtpCli does not currently support. Mail is queued to disk, so retries will continue if the application is restarted.
TMagMailQueue is designed to prepare, queue and send email. Preparing the email is done using the ICS THtmlSmtpCli component so it may be plain text or HTML email with one or more file attachments.
Once the mail properties in QuHtmlSmtp have been specified, it is queued using the QueueMail method which saves it to an EML spool file.
The component runs a thread which checks the queue for new EML spool files, and attempts to forward them to one or more SMTP Mail Servers using TSslSmtpCli, optionally with SSL. If mail delivery succeeds, the spool file may be deleted or moved to an archive folder. If mail delivery fails, the spool file remains in the queue and further attempts are made separated by the times in minutes listed in the RetryList list. If all delivery attempts fail, the spool file may be deleted or moved to a badmail folder.
Note that some email servers support grey listing and reject the first email attempt from a new sender but allow a retry 10 or 15 minutes later, something that is very effective in blocking spam emails (since they don't usually retry).
If multiple mail servers are specified, delivery is attempted once using each server, for each retry attempt. Each mail server is specified as TMailServer and there is no limit to the total.
Each time the queue is updated or a delivery attempt made, the queue is saved to file in the control folder, so the component may be stopped and restarted with failed attempts continuing.
The EML spool files are compatible with those created by many Microsoft email applications such as CDO, and the AddtoQueue method can also be used to queue existing EML files with the queue details specified in MailQuItem.
Note, this component is intended for sending low volume email from individual Delphi applications, with more flexibility than a simple TSslSmtpCli component. For use as a heavy duty SMTP server, queue processing could be improved to avoid moving records around as much or saving them to disk as often, and mail bodies could be read as required from disk instead of being read entirely to memory first. A mail pickup folder could be added which is scanned for new EML files.
Files and Folders Used
The TMagMailQueue component heavily uses disk files, in different sub-directories within the mail root directory specified in property MailQuDir, these are:
If logging of sent email is specified, the default file name FileQuSent property is MailQuSent-yyyymmdd.log inb CSV format similar to MailQuItems.Hdr.
A demo application mailqudemo.exe illustrates simple email queuing. The zip contains the EXE demo and required SSL files.
18th January 2011 - 1.0 - first public release. Not yet tested with Delphi 2009 or later.
2nd March 2011 - 1.2 - automatically create mailqueue directory in demo application, removed missing uses statement. Support queuing mail with OwnHeaders bypassing htmlmail. Log event definition changed.
11th August 2011 - 1.2 - updates subroutines for Win64 support, removed one unneeded unit from uses.
5th Oct 2011 - 1.3 - Debug logging works properly Don't retry emails that fail too large for server (error 552)
11th Sept 2012 - 1.4 - ICS V8, IPv6
23rd March 2013 - 1.5 - Added Mail Server SocketFamily and LocalAddr6 for IPv6
10th Dec 2014 - 1.6 - Better SSL handshake reporting
27th Oct 2015 - 2.0 - requires ICS V8.19 October 2015 or later.
7th July 2016 - 2.1 - requires ICS V8.30 July 2016 or later.
1st December 2016 - 2.2 - requires ICS V8.39 November 2016 or later.
6th March 2017 - 2.3 - requires ICS V8.43 March 2017 or later.
11 Mar 2017 - 2-4 - Added WaitSend to wait until everything sent.
22th Jun 2018 - 2.5 - requires ICS V8.55 20 June 2018 or later.
26th November 2018 - 2.5 - tested with ICS 8.58
Now part of ICS V8.60 and later.
Now part of ICS V8.60 and later, as TIcsIpStrmLog
Magenta Systems IP Log Streaming Component
TMagIpLog is designed for IP stream logging, using TCP Client, TCP Server, UDP Client or UDP Server protocols, sending simple text lines across a network so they may be displayed or written to disk remotely. The component allows two way communication with TCP and UDP, so may also be used for simple protocols such as communication between two applications. The component supports multiple client sockets so may be used to send data to two or more different remote servers at the same time.
For TCP and UDP clients, the component will optionally ping the remote computer first before opening an IP connection to allow faster failure retries and some confirmation that UDP may work. TCP client provides repeated connection retry attempts, including re-establishing a lost connection. UDP client will optionally keep pinging the remote during a connection to ensure it's still there. UDP server sends data to the IP address and port from which it last received data. TCP server supports multiple remote clients connecting. Received data is parsed for various line endings optionally removing control characters and triggering an event for a received line. The only other two events are optional, one for state changed when starting and stopping, the second offering progress information and errors.
The component supports both IPv4 and IPv6, host name lookup for TCP and UDP Client, and SSL connections for TCP Client and TCP Server, including remote server certificate checking using either a local PEM bundle root file or the Windows Certificate Store.
A demo application testiplog.exe illustrates use of TMagIpLog as a TCP or UDP client or server, and both in the same program sending data locally. The same component may be used in a client or server application, to send or receive.
The Magenta Systems ComCap application may also be used to capture IP streams to files or a database.
1 - Drop the component onto a form (or create it in code, see testiplog.exe).
2 - Specify LogProtocol as one of logprotUdpClient, logprotUdpServer, logprotTcpServer, logprotTcpClient.
3 - For client protocols, specify RemoteHost (name or IP address) and RemoteIpPort, CheckPing true if ping to be used, RetryAttempts to non-zero if continual retries not needed, RetryWaitSecs for delay between retries .
4 - For server protocols, LocalIpAddress is 0.0.0.0 to listen on all local addresses, LocalIpPort must be non-zero.
5 - For sending data, AddCRLF to false if line already have terminating characters, UdpNoCRLF to false if UDP should send CRLF.
6 - For receiving data, LineEndType to one of lineendCR, lineendLF, lineendCustom (set in hex in CustomLineEnd) or lineendPacket (for UDP), then MaxLineLen if a line should be returned before lineend is found, normally non-ASCII characters are removed, set StripControls to false if they should be replaced by spaces, RawData to true if CR, LF, FF and control characters should not be removed.
7 - Assign onLogRecvEvent if data is to be received, onLogChangeEvent if tracking of start and stop is needed, onLogProgEvent if progress information is needed for logging.
8 - Call StartLogging. The LogChangeEvent and LogProgEvent will trigger when LogState changes to logstateOK when data may be sent.
9 - To send a line, if function GetAnyStateOK is true, call SendLogLine. MaxSendBuffer specifies the amount of data that can be buffered otherwise SendLogLine will fail.
10 - Received data will trigger LogRecvEvent once per line.
11 - Call StopLogging to stop. Buffered data may continue to be sent after close, keep calling CheckStopped until true when it's really finished and component may be destroyed.
12 - To send an unlimited size stream, create a stream in the application with TBufferedFileStream or TFileStream, and pass it to SendStream. LogState changes to logstateOKStream while it's being sent, then back to logstateOK as it finishes, the application should then free the stream.
13 - There is no specific handling for receiving a stream, textual data will be handled according to the normal line end properties, and can be saved to another stream in LogRecvEvent. Binary data is more problematic, set RawData to true and MaxLineLen to get a buffer load at a time, but the last buffer load will need to be extracted with GetPartialLine using a timeout, this is called automatically when the connection is closed.
14 - To send to multiple clients, set MaxSockets to the number needed, then use the function SetRemotes to specify the remote host and port for each socket number, base 0. The events all return Socnr to indicate which socket. MaxSockets also specifies how many remote clients can connect to TCP Server, but note that Socnr is dynamic and changes as remote clients come and go.
15 - To support SSL on TCP/IP client or server, drop an TSslContext component on the form, assign it to the LogSslContext property and set the ForceSsl property to true. For better performance, set LogSslSessCache to a TSslAvlSessionCache component.
16 - For SSL TCP Server, the SslContext component must have the SslCertFile and SslPrivKeyFile properties set to the file names of an SSL certificate and Private Key PEM files respectively, and SslCipherList set to sCipherMozillaSrvBack for strong but backward compatiblle cipher support. The component includes sample self signed certificate and password files iplog-cert.pem and iplog-prvkey.pem, and you can create your own with the ICS SSL sample application Pemtool, or buy commercial PEM certificates.
17 - For SSL TCP Client, the SslContext component must have the SslCAFile property set to the file name of a PEM root certification authority file containing trusted root certificates. Such a file is supplied with the component RootCaCertsBundle.pem containing various root certificates covering most major registries. SslContext SslCipherList can be left as the default to allow connection to any server. The LogSslVerMethod property can be logSslVerNone to skip certificate verification, logSslVerBundle to check using the CA bundle file or logSslVerWinStore to check using the Windows certificate store (a little slower, bur maybe more certificates). To check if certificates have been revoked set LogSslRevocation to true, beware this needs public internet access and can be very slow or fail. LogSslReportChain set to true reports certificate details checked.
18th August 2007 - 1.1 - using OverbyteIcsFtpSrvT instead of OverbyteIcsLibrary, UDP receive packets may be from multiple hosts, always keep IP.
5th August 2008 - 1.2 - made compatible with ICS V7 and Delphi 2009. Note only supports ANSI with Delphi 2009.
20th August 2009 - 1.3 - fixed problem with MaxSockets being reported as closed in the event when only one was open, tested with Delphi 2010.
9th August 2010 - 1.4 - removed cast warnings with Delphi 2009 and later
22nd Sept 2011 - 1.5 - added SndBufSize and RcvBufSize to increase buffer sizes and speed
11th Sept 2012 - 1.6 - better error for too many clients with server added CurSockets property for current number of server sockets
7th July 2014 - 2.0 - now only ICS 8 and later, using new ICS ping.
13th July 2015 - 2.2 - requires ICS V8.18 June 2015 or later.
23rd Oct 2015 - 2.3 - requires ICS V8.19 October 2015 or later.
8th July 2016 - 2.4 - requires ICS V8.30 July 2016 or later.
23rd Nov 2016 - 2.5 - requires ICS V8.39 November 2016 or later.
7th March 2017 - 2.6 - requires ICS V8.43 March 2017 or later.
22nd June 2018 - 2.7 - requires ICS V8.55 20 June 2018 or later.
14th December 2018 - 2.8 - tested with ICS 8.58
Now part of ICS V8.60 and later. Uses IcsHosts.
Now part of ICS V8.60 and later, as TIcsWhoisCli with a new sample application
Whois Component and Demo
A Whois component and demonstration application. Whois is a protocol to interpret a remote server for information about a domain name or an IP address, and return textual information about 'owner' of the name or address. The demo application interprets the result and will perform a secondary query to another Whois server if necessary.
Now part of ICS V8.60, as TIcsTimeClient and TIcsTimeServer with a new sample application
SNTP Time Server and Client Components
TTimeServ is an updated version of Nathan Anderson's time server component adding SNTP support. TWSTimeClient is an updated version of Chris Barber's time client component adding SNTP support and functions to change the PC UTC time. SNTP provides time correction with fractional seconds, unlike the earlier Time protocol that is round seconds only.
Magenta Systems Ltd, 9 Vincent Road,
Croydon CR0 6ED, United Kingdom