This is a common question: You receive encrypted data and a key and want to decrypt. The person providing the encrypted data has provided little information, perhaps only that the encryption algorithm is AES. Where to do you begin, and what additional information, if any, do you need? Answer: AES encryption comes in 3 key sizes: 128-bit, 192-bit, and 256-bit. […]
A Chilkat customer pointed me to this useful information: http://www.campaignmonitor.com/css/ Important: I don’t know if the writers at campaignmonitor.com are aware of the different ways embedded images may be referenced (from within the CSS or from within HTML). It can be via “CID” or by URL w/ matching Content-Location header field. Chilkat can do both by setting the UseCID property […]
The following changes, fixes, and new features are available in version 9.0.8. General Fixed iso-2022-jp issues with converting to/from the iso-2022-jp character encoding. General performance improvements Added AutoFix property to POP3, SMTP, IMAP, and FTP2. If on, then the component will auto-fix property setting mistakes related to port numbers and SSL/TLS. For example, well known ports 465, 990, 995, and […]
Question: How do I go about adding text to the entry.comment field while zipping individual files? Answer: After appending files via the AppendFiles (or other append methods), you’ll have a zip object with N entries, each of which is a reference to a file that will be zipped when WriteZip is called (or WriteZipAndClose, or WriteExe, etc.). You can then […]
When an email is sent with BCC recipients, the BCC email addresses are not listed in the header. The “To” recipients are listed in the “To” header field, and the “CC” recipients are listed in the “CC” header field, but the BCC recipients are intentionally left out. This is what makes it a “blind” carbon copy — the recipients are […]
Here is a C# example to append more text to an email’s body: Chilkat.Email email = new Chilkat.Email(); bool success = email.LoadEml(“in.eml”); if (!success) { textBox1.Text = email.LastErrorText; return; } // Does this email have a plain-text body? if (email.HasPlainTextBody()) { string s = email.GetPlainTextBody(); s += “\r\nMore text appended to the email’s plain-text body.”; // Replace the plain-text body: […]
Question: How can I access Public Folders in IMAP? This does not work: imap.SelectMailbox(“Public Folders”) Answer: The syntax in Outlook may be different than what is actually used in the underlying IMAP protocol. For example, in Outlook you may see “public folders\all public folders\test”, but you would instead use: imap.SelectMailbox(“public folders/test”)
The following Java code produces a digital signature that can be verified using Chilkat RSA. Links to the Chilkat signature verification examples follow this code. The Java signature creation code does not use Chilkat to produce the digital signature. It also demonstrates how to save a generated key (public and private) to DER files that can be used with Chilkat […]
There are many FTP2 component properties that affect how data connections are established between the FTP client (Chilkat FTP2) and the FTP server. Finding a workable combination of property settings for a given client/server situation can be difficult. This blog post can hopefully provide some guidance. Before beginning, it is crucial to understand one basic thing about the FTP protocol: […]
Question: Is there a way to encrypt a file with progress monitoring? Huge files can take a while and it seems like the app is hanging. Answer: Yes, here is the sample VB6 code: Public WithEvents myCrypt As ChilkatCrypt2 ‘ …. Private Sub myCrypt_PercentDone(ByVal pctDone As Long) ProgressBar1.Value = pctDone End Sub Private Sub Command2_Click() Set myCrypt = New ChilkatCrypt2 […]