asn.1

问题 I've created multiple 1024-bit DER-encoded RSAPublicKeys (PKCS #1) with the openssl command: openssl genrsa 1024 | openssl rsa -outform DER -RSAPublicKey_out -out pubkey.der So far, every public key file created like this has been exactly 140 bytes. Are 1024-bit RSA public keys encoded in this format always 140 bytes, or can this size vary? I've learned that the size of a DER encoded private key can vary. 回答1: It should always be 140 bytes for a 1024-bit key using an exponent value of F4

问题 i am trying to compile ASN file using ASN.1 Studio. the file i m using is RFC-1212. i am getting "error A0120E: Parsing error: expecting typereference but found indextype." anyone had the same problem. if not please share the RFC-1212 mib file Regards Giri 来源： https://stackoverflow.com/questions/32561902/asn1-rfc1212-giving-syntax-error

问题 I ran the free online compiler (at http://lionet.info/asn1c/asn1c.cgi) and created source files for the IMSRecord (telecom CDR). It built okay, but when I run the generated C executable, it prints the strings as hex characters, as follows: sIP-Method: 49 4E 56 49 54 45 How can I get it to print as sIP-Method: INVITE I tried the various command-line options, but could not get it to change. Is this perhaps related to one of the online compiler options that I probably did not understand at the

问题 How do you retrieve the extension ID from the xpi file? (It is needed f.ex. for global extension installation) In previous versions, you could get it from the install.rdf , which no longer exists in WebExtensions. http://www.di-mgt.com.au/how-mozilla-signs-addons.html describes that it is contained in the META-INF/mozilla.rsa file. In python, there is the pyasn1 library. I could not get it to work on the first attempt: from pyasn1.codec.der import decoder f = open('/path/to/addon-dir/META-INF

问题 am trying to parse binary CDRs using JASN1 I have successfully generated Java classes using grammer file not I have a CDR which I need to decode, but I can't get it to work, I don't understand what kind of inputs it requires I have reached a point where I can parse CDR into lines like below [1][[0]#01, [1]#26fd, [3]#4131002400, [8]#14040020236233, [9]#21436500000041, [10]#196105000045ffffffffffff, [13]#13900049999957, [14]#21436549999961, [15]#05, [16]#05, [17]#116102999954ffffffffffff, [22]

问题 I have a java program using an HSM that with the native API gives me and R and S value of an ECDSA signature which is just the two Big Integers. I need to take those Integers and create ASN.1 encoding. Any idea on how I could do that? I do have BouncyCastle up and running but, I am not familiar with the options available to me. 回答1: A small example to illustrate: import org.bouncycastle.asn1.ASN1Integer; import org.bouncycastle.asn1.DERSequence; import javax.xml.bind.DatatypeConverter; import

问题 I have heard many times " after compilation of an asn.1 there were many errors " or something like this. But what does it mean " compile asn.1 " at all? As I know asn.1 is a notation to describe data structures, how it should be compiled (translation from asn.1 to what language?) and what do I do with that compiled stuff? Update: is it just a generation of a structure encoder/decoder in a certain programming language? after that one can use encoder and decoder integrate these to an

问题 I am extracting SSL/TLS certificate fields from serverhello packet using scapy-ssl_tls library which I installed using pip. The problem is, I'm not able to figure out a way to extract values from ASN1 encoded fields: sign_algo2: <ASN1_OID['.1.2.840.113549.1.1.11']> sa2_value: <ASN1_NULL[0L]> not_before: <ASN1_UTC_TIME['170321131500Z']> not_after: <ASN1_UTC_TIME['200321131500Z']> pubkey_algo: <ASN1_OID['.1.2.840.113549.1.1.1']> version: <ASN1_INTEGER[2L]> sn: <ASN1_INTEGER[6348220899422160075L

问题 I tried to use ASN.1 for a client server communication, but i'm not sure that i understand it correctly . The Client have to send an integer to the server, the server read it and send back a number and a String, the Client read them and send back a String the server read it and send back a String. It's something like this. Client ---> server 1 integer Server --> Client 1 integer Server --> Client 1 String Client ---> server 1 String Server --> Client 1 String I wrote the following ASN.1

问题 I am trying to do ASN.1 marshal/unmarshal for the following definition: ACEI ::= SEQUENCE { message MessageFields, neRegNumber OCTET STRING OPTIONAL, gpsInfo GpsInfo OPTIONAL, siteInfo OCTET STRING OPTIONAL, nlementID INTEGER(0..16777216) OPTIONAL, ... } GpsInfo ::= SEQUENCE { gpsLat INTEGER(-900000000..900000000) OPTIONAL, gpsLong INTEGER(-1800000000..1800000000) OPTIONAL, gpsAlt INTEGER OPTIONAL, ... } MessageFields ::= SEQUENCE { messageSequence INTEGER (1..65535), bsId INTEGER (1..65535)