Chilkat DSA Objective-C Library is an simple library to create and verify DSA signatures and keys.

The Digital Signature Algorithm (DSA) is a United States Federal Government standard (or FIPS) for digital signatures.

DSA was proposed by the National Institute of Standards and Technology (NIST) for use in their Digital Signature Standard (DSS).

Here are some key features of "Chilkat DSA Objective-C Library":

· Create and verify DSA signatures.
· Generate DSA keys.
· Generate DSA keys based on parameters created by OpenSSL.
· Set public key explicitly from P, Q, G, and Y values.
· Set private key explicitly from P, Q, G, and X values.
· Provides access to P, Q, G, X, and Y as hex-encoded SSH1-format bignums.
· Import public/private DSA keys from DER.
· Import public/private DSA keys from PEM.
· Import encrypted private DSA keys from PEM.
· Import public/private DSA keys from XML.
· Export public/private DSA keys to DER.
· Export public/private DSA keys to PEM.
· Export encrypted private DSA keys to PEM.
· Export public/private DSA keys to XML.

Limitations:

· 30 days trial.

What's New in This Release: [ read full changelog ]

· (Crypt2, MIME, MailMan) Now supports the ability to create CAdES-BES and CAdES-EPES digital signatures.   See CAdES for more information.
· (IMAP) Added the ability to download emails without attachments, and to download attachments separately.  See Download email without attachments and downloading attachments separately for more information.
· (MACOSX, IOS) Eliminated the SIGPIPE exception that can occur when a socket write is attempted after the previously connected peer disconnects.
· (Email) No longer includes the “This is a multi-part message in MIME format.” line in multipart/mixed messages.  Note: The presence of this line is very common and transparent (i.e. it is not visibly seen when viewing an email in an email client such as Outlook or Thunderbird).
· (IMAP) The “ckx-imap-internaldate” header field is now added to emails downloaded from IMAP servers.  This allows for subsequent calls to AppendMail to restore the same internal date when uploading the email to a new IMAP server or...