xcc | Toy C compiler for x86-64/aarch64/wasm | Compiler library

 by   tyfkda C Version: ver/stack-based License: No License

kandi X-RAY | xcc Summary

kandi X-RAY | xcc Summary

xcc is a C library typically used in Utilities, Compiler applications. xcc has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Toy C compiler for x86-64/aarch64/wasm
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              xcc has a low active ecosystem.
              It has 111 star(s) with 6 fork(s). There are 5 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 15 open issues and 85 have been closed. On average issues are closed in 204 days. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of xcc is ver/stack-based

            kandi-Quality Quality

              xcc has no bugs reported.

            kandi-Security Security

              xcc has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              xcc does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              xcc releases are not available. You will need to build from source code and install.
              Installation instructions, examples and code snippets are available.

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            xcc Key Features

            No Key Features are available at this moment for xcc.

            xcc Examples and Code Snippets

            No Code Snippets are available at this moment for xcc.

            Community Discussions

            QUESTION

            Encrypt in JS front end and decrypt in python backend using AES GCM
            Asked 2021-Jun-14 at 18:01

            I am trying encrypting in JS front end and decrypt in python backend using AES GCM cryptographic algorithm. I am using Web cryptography api for JS front end and python cryptography library for python backend as cryptographic library. I have fixed the IV for now in both side. I have implemented encryption-decryption code in both side, they work on each side. But I think the padding is done differently, can't seem to figure out how the padding is done in web cryptography api. Here is the encryption and decryption for the python backend:

            ...

            ANSWER

            Answered 2021-Jun-14 at 18:01

            GCM is a stream cipher mode and therefore does not require padding. During encryption, an authentication tag is implicitly generated, which is used for authentication during decryption. Also, an IV/nonce of 12 bytes is recommended for GCM.

            The posted Python code unnecessarily pads and doesn't take the authentication tag into account, unlike the JavaScript code, which may be the main reason for the different ciphertexts. Whether this is the only reason and whether the JavaScript code implements GCM correctly, is difficult to say, since the getMessageEncoding() method was not posted, so testing this was not possible.

            Also, both codes apply a 16 bytes IV/nonce instead of the recommended 12 bytes IV/nonce.

            Cryptography offers two possible implementations for GCM. One implementation uses the architecture of the non-authenticating modes like CBC. The posted Python code applies this design, but does not take authentication into account and therefore implements GCM incompletely. A correct example for this design can be found here.
            Cryptography generally recommends the other approach for GCM (s. the Danger note), namely the AESGCM class, which performs implicit authentication so that this cannot be accidentally forgotten or incorrectly implemented.

            The following implementation uses the AESGCM class (and also takes into account the optional additional authenticated data):

            Source https://stackoverflow.com/questions/67963529

            QUESTION

            How to save a list of URIs matching a pattern in Marklogic with corb?
            Asked 2021-Jun-10 at 17:42

            I need some help with MarkLogic, XQuery & corb,

            I have millions of documents in the database, I'm trying to write the XQuery to saved the matched uris.

            urisVersions.xqy

            ...

            ANSWER

            Answered 2021-Jun-10 at 17:42

            Configure the job with the PROCESS-TASK option to use the com.marklogic.developer.corb.ExportBatchToFileTask class, which will write the results of each process module invocation to an output file. You can configure where to write the file and the filename with EXPORT-FILE-NAME and EXPORT-FILE-DIR options. If you don't configure the EXPORT-FILE-DIR and just give it a filename with EXPORT-FILE-NAME it writes relative from where CoRB is launched.

            Source https://stackoverflow.com/questions/67925007

            QUESTION

            nginx / docker / ssl for localhost
            Asked 2021-Jun-03 at 14:12

            I want to enable ssl for localhost, with nginx and a self signed certificate. I want to do this because I'm putting nginx as a reverse proxy in front of an application that redirects with https, and I don't want to modify the application

            I have generated the certificate with the following command:

            ...

            ANSWER

            Answered 2021-Jun-03 at 14:12

            You must add the certificates inside server block on nginx.conf:

            Source https://stackoverflow.com/questions/67813140

            QUESTION

            how to make a self made TLS packet appear as tls in Wireshark and not as data
            Asked 2021-Jun-01 at 21:45

            Lately I have started implementing TLS for the sport as a fun project and I'm currently trying to self make and send locally a client hello TLS packet (a minimal one).

            When observed via the loopback interface in Wireshark it appears as pure data instead of a tls layer with all of the various fields and after lots of trying I decided to ask here the following questions:

            1. What's the difference between my self made packet and a real TLS client hello one?
            2. How does Wireshark selectively makes one appear as a TLS layered instead of pure data, is there an identifier field in the packet that declares it as pure data or a TLS layered one?
            3. How can I make my packet to appear as a client hello TLS packet instead of pure data?

            Here is my server and client that send basically my c code output (remember that they are not made for real TLS handling but just to show the packet in Wireshark):

            server.py

            ...

            ANSWER

            Answered 2021-Jun-01 at 21:45

            For starters, the TLS length field is wrong. Wireshark's TCP dissector indicates that the TCP payload length is 78 bytes; yet the TLS length is 165 (0x00a5), and thus can't be correct. Also, the handshake length is wrong too. Try changing this:

            Source https://stackoverflow.com/questions/67761167

            QUESTION

            Converting Bytes to float format
            Asked 2021-May-19 at 19:57

            I have the following data from a datagram message received by UDP socket:

            ...

            ANSWER

            Answered 2021-May-19 at 19:55

            each float is 4 bytes of data (typically... not always... again you need to consult the docs for whatever p[ayload you need)

            but assuming that /13/raw is easy enough for you and the rest is what you need to decode

            if we assume that \x00 is some sort of delimiter we are left with the bytestring as follows

            Source https://stackoverflow.com/questions/67609685

            QUESTION

            C generated asm calls point to wrong offset
            Asked 2021-May-19 at 13:43

            I wrote a shellcode in C that pops a messagebox. I have compiled two variations of it. One says "Hello World!" (shellcodeA) and the other one says "Goodbye World!" (shellcodeB).

            ...

            ANSWER

            Answered 2021-May-19 at 13:43

            I don't know where you see the value 0x119, but BYTE bootstrap[12] is a BYTE array.

            So assigning bootstrap[i++] = sizeof(bootstrap) + shellcodeALength - i - 4; will store the lowest byte of the expression in bootstrap[i++] and ignore the rest, hence can never go above 255.

            You probably want something like this instead:

            Source https://stackoverflow.com/questions/67603760

            QUESTION

            Writing 00 in hex char array
            Asked 2021-May-07 at 07:44

            I have to send commands to some device with the hexadecimal format.

            I have succeeded to send hex commands with "\xAA\xBB\xCC\xDD\xEE" and "\xAA\xBB\xCC%c\xEE" with %c containing a certain decimal value.

            But I can't send 00 value like "\xAA\xBB\xCC0x00\xEE".

            I've seen many topic on this, but no solution fits my need. I tried different things, like:

            ...

            ANSWER

            Answered 2021-May-07 at 07:44

            As @MikeCAT and @Remy Lebeau said : sprintf(char_array, "\xAA\xBB\xCC%c\xEE", '0'); work. The issue was that later in my code I have a strlen(char_array) which returned :

            6 for sprintf(char_array, "\xAA\xBB\xCC\xDD\xEE", 22); and

            4 for sprintf(char_array, "\xAA\xBB\xCC%c\xEE", 0);

            So for now i will fix the size at 6. Thanks for your help.

            Source https://stackoverflow.com/questions/67419517

            QUESTION

            python: efficient way to check for leading zeros in a bytes object
            Asked 2021-Apr-23 at 15:32

            I am looking for an efficient way to check for leading zeros in a bytes object. The check should run also for nibbles. Right now I am checking bytes only, with the search_zeros function; where the input parameters are: n: number of leading zeros to check for, and inp_bytes the bytes object:

            ...

            ANSWER

            Answered 2021-Apr-23 at 15:32

            I would avoid constructing check_bytes, since that will consume unnecessary storage in memory when n is very large. So my approach would be to use a loop or an equivalent comprehension.

            Additional considerations:

            • I assume you don't want an exception if the string is too short, so I added some logic for that case. I think len(inp_bytes) is a constant time operation, so this should be fast.
            • I'm using the fact that a byte y is "True" when non-zero, I'm pretty sure that's as fast a way as any, but benchmarking could confirm that if you're really after all the nanoseconds you can save.
            • You can use bitwise operations to test the last nibble if n is odd. Note that in Python, bitwise operations are defined on bytes, but not in sequences of bytes. b'\xf0' is a sequence of bytes, so & b'\xf0' yields an exception. b'\xf0'[0] is the first (and only) byte in that sequence, and that's accepted as an operand of &.
            • EDIT: you clarified in the comments you only want inp_bytes returned if the number of leading zeros exactly equals n--logic added to check that the next nibble is non-zero.

            With all that in mind, this is my solution:

            Source https://stackoverflow.com/questions/67230294

            QUESTION

            How to extract only the english words from the list?
            Asked 2021-Apr-08 at 03:17

            I tried to extract only the English words from the following list:

            ...

            ANSWER

            Answered 2021-Apr-03 at 14:08

            if you know what you want to search , just search .

            Source https://stackoverflow.com/questions/66931801

            QUESTION

            convert python string of byte data to bytes
            Asked 2021-Apr-05 at 16:23

            I have a Python string of bytes data. An example string looks like this:

            ...

            ANSWER

            Answered 2021-Apr-05 at 14:48

            I assume that you have python-like string representation in variable s:

            Source https://stackoverflow.com/questions/66954677

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install xcc

            xcc: Compiler entry
            cpp: Preprocessor
            cc1: C compiler
            as: Assembler

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