asn.1

SNMP: ASN.1 MIB Definitions. Referencing a table within a table

独自空忆成欢 提交于 2019-11-28 06:01:59
Its's been a while since I've written ASN.1 so.. Our data model is comprised of several table definitions within a table. This is not workable in SNMP, so we need to flatten the definitions. The easiest way to do this would be to have the embedded table indexed by the same OID as the parent table. Thus someTableEntry ::= SEQUENCE { someTableIndex Integer32, someTableDomain Integer32, someTableFooTable SEQUENCE OF SomeTableFooTable } becomes someTableEntry ::= SEQUENCE { someTableIndex Integer32, someTableDomain Integer32, } someTableFooTable ::= SEQUENCE { someTableIndex Integer32, .... } The

Java implementation of C# SignedCms

若如初见. 提交于 2019-11-28 03:11:40
问题 I am working on an implementation of C# SignedCms functionality in Java. I am using bouncycastle libs. The problem is I get java signature that is different from the one generated with SignedCms. C# code X509Certificate2 certificate = new X509Certificate2("myCertPath", "myPass"); String text = "text"; ContentInfo contentInfo = new ContentInfo(System.Text.Encoding.UTF8.GetBytes(text)); SignedCms cms = new SignedCms(contentInfo, false); CmsSigner signer = new CmsSigner(certificate); signer

How to determine at run-time if app is for development, app store or ad hoc distribution?

坚强是说给别人听的谎言 提交于 2019-11-28 02:49:15
Is there a way to determine programmatically if the currently running app was built and signed for development only or whether it was built for distribution? And can one determine if was build for app store or ad hoc distribution? Is it e.g. possibly to access the code signature and get the information from there? Or are there certain files present in one of variants that don't exist in the other ones? Is part of the bundle info? Or can it be derived from the executable file? Any hints are appreciated. It seems that the embedded.mobileprovision file is in ASN.1 format. The easiest way to check

How do I decode a DER encoded string in Java?

若如初见. 提交于 2019-11-27 21:21:12
I'm trying to read a custom extension from a digital certificate. I know the value is a GeneralString encoded in DER. Is there an easy way to correctly decode it and get a Java String? I tried the following, but 's' includes some of the encoding metadata as junk characters at the start of the string. byte[] ext = cert.getExtensionValue("1.2.3.4"); String s= new String(ext); System.out.println(s); Is there a quick and easy way to do this? Or do I really need to use some full fledged ASN.1 library? Thanks! BouncyCastle is (among everything else): A library for reading and writing encoded ASN.1

What's the best way to serialize data in a language-independent binary format?

孤街浪徒 提交于 2019-11-27 19:50:41
I'm looking into a mechanism for serialize data to be passed over a socket or shared-memory in a language-independent mechanism. I'm reluctant to use XML since this data is going to be very structured, and encoding/decoding speed is vital. Having a good C API that's liberally licensed is important, but ideally there should be support for a ton of other languages. I've looked at google's protocol buffers and ASN.1 . Am I on the right track? Is there something better? Should I just implement my own packed structure and not look for some standard? Given your requirements, I would go with Google

What are the key differences between Apache Thrift, Google Protocol Buffers, MessagePack, ASN.1 and Apache Avro?

≡放荡痞女 提交于 2019-11-27 19:41:56
问题 All of these provide binary serialization, RPC frameworks and IDL. I'm interested in key differences between them and characteristics (performance, ease of use, programming languages support). If you know any other similar technologies, please mention it in an answer. 回答1: ASN.1 is an ISO/ISE standard. It has a very readable source language and a variety of back-ends, both binary and human-readable. Being an international standard (and an old one at that!) the source language is a bit kitchen

What is needed to convert ASN.1 data to a Public Key? e.g. how do I determine the OID?

ε祈祈猫儿з 提交于 2019-11-27 18:48:47
问题 This code relates to DKIM signature verification used in anti-spam efforts. I have a byte[] from s1024._domainkey.yahoo.com that is ASN.1 encoded, but I don't know if that alone contains enough information to materialize a public key. Based on this class, it appears I can convert an ASN.1 key into a X509Certificate Public key, but I need to supply an OID and some ASN.1-encoded parameters. In this example I have metadata that the ASN1 key is: An RSA encoded key (ASN.1 DER-encoded [ITU-X660

SNMP: ASN.1 MIB Definitions. Referencing a table within a table

早过忘川 提交于 2019-11-27 05:37:53
问题 Its's been a while since I've written ASN.1 so.. Our data model is comprised of several table definitions within a table. This is not workable in SNMP, so we need to flatten the definitions. The easiest way to do this would be to have the embedded table indexed by the same OID as the parent table. Thus someTableEntry ::= SEQUENCE { someTableIndex Integer32, someTableDomain Integer32, someTableFooTable SEQUENCE OF SomeTableFooTable } becomes someTableEntry ::= SEQUENCE { someTableIndex

Correctly create RSACryptoServiceProvider from public key

﹥>﹥吖頭↗ 提交于 2019-11-27 05:20:25
I'm currently trying to create an RSACryptoServiceProvider object solely from a decoded PEM file. After several days of searching, I did manage to wrangle a working solution but it's not one that would be production ready. In a nutshell, in order to create an RSACryptoServiceProvider object from the bytes that make up the public key in a PEM file, I must create the object specifying the keysize (currently 2048 using SHA256, specifically) and then importing a RSAParameters object with the Exponent and Modulus set. I'm doing this as so; byte[] publicKeyBytes = Convert.FromBase64String

How does ASN.1 encode an object identifier?

血红的双手。 提交于 2019-11-27 01:05:42
问题 I am having trouble understanding the basic concepts of ASN.1. If a type is an OID, does the corresponding number get actually encoded in the binary data? For instance in this definition: id-ad-ocsp OBJECT IDENTIFIER ::= { id-ad 1 } Does the corresponding 1.3.6.1.5.5.7.48.1 get encoded in the binary exactly like this? I am asking this because I am trying to understand a specific value I see in a DER file (a certificate), which is 04020500, and I am not sure how to interpret it. 回答1: Yes, the