The Chilkat proprietary email API concocts message IDs with formats like this:
CHILKAT-MID-862e2615-b706-5239-b049-38ded70b2a77
How is that value calculated? Is that a standard unix digest of some kind, or is it an unknown code?
After analysis, it appears to be a standard Windows GUID.
Related
What is Tally query language? I searched online but I didn't get anything on TQL. I got something about Tally definition language. Is there any difference between Tally query language and Tally definition language?
Tally query language:-
it's another name is Natural Query Language acts as an interface between the user and a company connected to Tally Software Services (TSS). Natural Query Language uses queries composed of basic, non-technical, English words.
Tally definition language:-
it's including working with different Units of Measures.it's the application development language of Tally and using the application is build than generate a TCP extension file. That file copy-paste in install location of tally erp 9.
Natural Query Language acts as an interface between the user and a company connected to Tally Software Services (TSS). It is a way of communicating in normal words, following the grammar or syntax of a spoken language. Natural Query Language uses queries composed with basic, non-technical, English words.
To retrieve information from a company connected to Tally[.]net, the user types a query on the mobile phone and sends it to a designated number. Tally.ERP 9 converts the query to a format which the database understands and extracts the required information from the company. The user receives a response with information in a simple format.
Example:
1.Working Capital ( Returns Working Capital)
2.Ledger Kotak Bank Address / Closing Balance / Account Name ( Returns Detailed Ledger of Kotak Bank)
It's called Natural Query Language, and has documentation available here.
Natural Query Language acts as an interface between the user and a company connected to Tally Software Services (TSS). It is a way of communicating in normal words, following the grammar or syntax of a spoken language. Natural Query Language uses queries composed with basic, non-technical, English words.
How It Works
To retrieve information from a company connected to Tally.NET, the user types a query on the mobile phone and sends it to a designated number. Tally.ERP 9 converts the query to a format which the database understands and extracts the required information from the company. The user receives a response with information in a simple format.
Using ConsumeIMAP to read emails from an Inbox and trying to select only emails that have
- attachment to download
- sent "From" xyz#yahoo.com
- send "To" abc#gmail.com
- Have "Daily" in their subject
- at 8 am EST
Please let me know if it can be set in any component. I tried to use EvaluateJsonPath, ExtractEmailHeaders and RouteonAttribute but no luck yet.
It sounds like you have been exploring the correct path. You should be able to achieve this using a flow consisting of:
ConsumeIMAP >> ExtractEmailHeaders >> RouteOnAttribute
ConsumeIMAP will download messages from the email server and create a single FlowFile for each message, storing the email message raw bytes in the FlowFile contents.
ExtractEmailHeaders attempts to parse a FlowFile's contents as email (must be RFC-2822 compliant), extract email headers, and write each header field to a FlowFile attribute, including:
email.headers.from.*
email.headers.to.*
email.headers.subject
email.headers.sent_date
Note that ExtractEmailHeaders is not doing any filtering, just populating FlowFile attributes based on the FlowFile content, thus making the FlowFiles more easily routable downstream in the flow. Start just by creating a flow that has these two processors and verify that the output of the ExtractEmailHeaders processor meets these expectations. If not, its possible the email messages are malformed or not RFC-2822 compliant.
After you have successfully sent email FlowFiles through ExtractEmailHeaders, you can do the filtering using one or more RouteOnAttribute processors using the NiFi Expression Language to define your match conditions, e.g.:
${email.headers.subject.contains("Daily")}
If you have verified that your flow is working correctly through ExtractEmailHeaders, but the filtering in RouteOnAttribute is not working as expected, make sure your attribute expressions and assumptions about email header values (e.g., capitalization, datetime format) are correct. Consult the Apache NiFi Expression Language Guide and if you have specific questions relating to the expression language itself, search here or post another question on that specifically.
I hope this helps!
I create using Mirth a channel that receives CDA messages in HL7V3 format.
I'm able to parse the message and extract all the data i need.
My question is: How do i create an acknowledgement to the receiver?
I found out that there is a message called MCCI_MT000200UV01 that i need to implement but i can't find good explanation and/or examples.
I have been working a long time with HL7V2 and the acknowledgement is very simple.
Can't find a way to implement this in HL7V3 format.
Thanks in advance for your help
I guess you are talking about a generic Accept Acknowledgment message which is MCCI_IN000002UV02 (according to the HL7v3 NE2014). If I were you, first thing to do I'd download the HL7v3 Normative Edition that matches the year of your inbound message used to transport the CDA document (unless it's HL7v2). Then I'd go to HL7v3NE > Specification Infrastructure > Messaging > Transmission Infrastructure > Generic Message Transmission and find the Accept Ack interaction. There is a related XML Schema that allows you to build an XML template for the v3 ACK (XMLSpy like tool does that by default).
Since ACKGenerator does not support HL7v3, next step is to create a code templates function that builds the v3 ACK from the template you acquired from the previous step.
(PS. The whole procedure with samples is explained in an "Unofficial Mirth Connect Developer's Guide" available at mirthconnect.shamilpublishing.com)
I am developing a SIP client. I understand SIP requests and SIP responses but, in SIP messages, how are the call id and branch tags generated? RFC3261 does not specify this.
The Call-ID header value can be anything you want but does need to be unique in order to avoid requests getting classified as duplicates.
THe branch parameter on a Via header needs to start with the magic cookie value of z9hG4bK and must also be unique to avoid the request getting classified as a duplicate. For SIP Proxy's wanting to do loop detection there is also the guideline in the RFC in section 16.6 point 8 which details factors to take when constructing the branch parameter value.
Your wording is difficult to understand. I'm going to assume you want to know how a UAC should generate a Call-ID or how a UAC or proxy server should generate a branch parameter.
The only requirement for Call-ID is that it should be unique. It is often in the form of a unique token + "#" + a host name like email's Message-ID, but it doesn't have to be. It can be just a unique token. The unique token can be anything that is reasonably certain to be unique. In order to avoid divulging private information you can just make it pseudorandom or a cryptographic hash of private unique information (time, process ID, etc...)
Similarily, the branch parameter is just a unique token, but note that it has to start with z9hG4bK as specified in the RFC.
Why re-invent the wheel?
There are open source SIP projects and their implementation may inspire you.
You didn't mention what programming language you use. So I assume you can read C code.
Get the source code of kamailio server. The implementation of Call-ID is in kamailio-4.0.x/modules/tm/callid.c. I believe you are smart and can find out about branch tags yourself :o)
What is the Difference between a Hash and MAC (Message Authentication code)?
By their definitions they seem to serve the same function.
Can someone explain what the difference is?
The main difference is conceptual: while hashes are used to guarantee the integrity of data, a MAC guarantees integrity AND authentication.
This means that a hashcode is blindly generated from the message without any kind of external input: what you obtain is something that can be used to check if the message got any alteration during its travel.
A MAC instead uses a private key as the seed to the hash function it uses when generating the code: this should assure the receiver that, not only the message hasn't been modified, but also who sent it is what we were expecting: otherwise an attacker couldn't know the private key used to generate the code.
According to wikipedia you have that:
While MAC functions are similar to cryptographic hash functions, they possess different security requirements. To be considered secure, a MAC function must resist existential forgery under chosen-plaintext attacks. This means that even if an attacker has access to an oracle which possesses the secret key and generates MACs for messages of the attacker's choosing, the attacker cannot guess the MAC for other messages without performing infeasible amounts of computation.
Of course, although their similarities, they are implemented in a different way: usually a MAC generation algorithm is based upon a hash code generation algorithm with the extension that cares about using a private key.
A hash is a function that produces a digest from a message. A cryptographically secure hash is for which it is computationally infeasible to generate a message with a given digest. On its own a hash of a message gives no information about the sender of a given message. If you can securely communicate the hash of a message then it can be used to verify that a large message has been correctly received over an unsecured transport.
A message authentication code is a way of combining a shared secret key with the a message so that the recipient of the message can authenticate that the sender of the message has the shared secret key and the no-one who doesn't know the secret key could have sent or altered the message.
An HMAC is a hash-based message authentication code. Usually this involves applying a hash function one or more times to some sort of combination of the shared secret and the message. HMAC usually refers the the algorithm documented in RFC 2104 or FIPS-198.
A MAC does not encrypt the message so the message is in plain text. It does not reveal the secret key so a MAC can be sent across on open channel with out compromising the key.
Found this to the point answer from another forum.
These types of cryptographic primitive can be distinguished by the security goals they fulfill (in the simple protocol of "appending to a message"):
Integrity: Can the recipient be confident that the message has not been accidentally modified?
Authentication: Can the recipient be confident that the message originates from the sender?
Non-repudiation: If the recipient passes the message and the proof to a third party, can the third party be confident that the message originated from the sender? (Please note that I am talking about non-repudiation in the cryptographic sense, not in the legal sense.) Also important is this question:
Keys: Does the primitive require a shared secret key, or public-private keypairs? I think the short answer is best explained with a table:
Cryptographic primitive | Hash | MAC | Digital
Security Goal | | | signature
------------------------+------+-----------+-------------
Integrity | Yes | Yes | Yes
Authentication | No | Yes | Yes
Non-repudiation | No | No | Yes
------------------------+------+-----------+-------------
Kind of keys | none | symmetric | asymmetric
| | keys | keys
Please remember that authentication without confidence in the keys used is useless. For digital signatures, a recipient must be confident that the verification key actually belongs to the sender. For MACs, a recipient must be confident that the shared symmetric key has only been shared with the sender.
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HASH FUNCTION: A function that maps a message of any length into a fixed length hash value, which serves as the authenticator.
MAC: A function of the message and a secret key that produces a fixed length value that serves as the authenticator.
A Hash is a summary or a finger print of a message and provide neither integrity nor authentication itself, as is it is susceptible to man-in-the-middle attack. Suppose A wants to send a message M, combined with hash H of M, to B. Instead C capture the message and generate Message M2 and hash H2 of M2, and sends it to B. Now B, by no mean can verify whether this is the original message from A or not. However, hash can be used in some other ways to achieve integrity and authentication, such as MAC.
A MAC which is also a summary of the message provide Integrity and Authentication. MAC can be computed in many ways. The simplest method is to use a hash function with two inputs, the message and a shared secret key. The use of the shared secret key adds the Authentication ability to the MAC, and thus provide integrity and authentication. However, MAC still does not provide non-repudiation, as any of the party(es) having the shared secret key can produce the message and MAC.
Here comes the Digital Signature and Public Key Cryptography in action.
Basically the main difference is MAC uses a private key and hash does not use any keys. Because of that MAC allows us to achieve authentication.
Hash functions utilize asymmetric cryptography whereas, MAC use symmetric cryptography.
Cryptographic hash functions are not always a MAC, but MAC can be a cryptographic hash functions (keyed hash functions).
Hash functions provide non-repudiation where MAC do no provide non-re