Check this code in C++:
http://www.codeproject.com/script/Content/ViewAssociatedFile.aspx?rzp=%2Fkb%2Fsecurity%2Felliptic_curves%2Fecc.zip&zep=main.cpp&obid=22452&obtid=2&ovid=1
you may need to fix the code.
Thank you, Mr. Neetesh Saxena. It is better if it use OpenSSL :). I would like to handle the key util 2048 bits.
I just found the following code in C. I didn't read all code, therefore, I don't know it whether work well or not. Anyway, I share it here:
https://github.com/Yalir/Synthese4A/tree/master/cryptron
----
I wrote Makefile as follows:
------
CFLAGS = -arch x86_64 -g -w -Os -std=c99 -I/usr/local/ssl/include -I./headers -I/usr/local/lib -I/usr/local/include -pthread -fno-stack-protector
LD=-L /usr/lib -lssl -lcrypto -L /usr/local/lib/
CC = gcc
CLEANFILES = ./*.o
PROGS= thanhtest1
OFS=ecies.o keys.o secure.o
all: struc thanhtest
struc: *.c
${CC} ${CFLAGS} -c $^
testMain.o: example.c
${CC} ${CFLAGS} -c -o $@ $^
thanhtest:testMain.o ${OFS}
${CC} ${CFLAGS} -o $@ $^ $(LD)
clean:
rm -f ${CLEANFILES}
rm -f ${PROGS}
rm -f *~
------------
It compiled well in my MacAir.
Hope it helpful.
There is also an article about writing such a code: Implementation of Elliptic Curve Cryptography in ‘C’ by Kuldeep Bhardwaj and Sanjay Chaudhary.
In the following link ECC key pair generation code is available in C using openssl.
http://fm4dd.com/openssl/eckeycreate.htm
You can get complete code in latest openssl library
http://fm4dd.com/openssl/eckeycreate.htm
Dear Mr. Kurra Mallaiah
Thank you so much. I used it before. However, I cannot encrypt/decrypt the message by that code.
you can find some code about ECC in the textbook entitled applied cryptography
I tried a demo (https://github.com/Yalir/Synthese4A/tree/master/cryptron) and it worked! I ignored some bugs.
The experimental results can be seen as follows:
=====
TEXTLENGTH: 39
Plain text:Ha Noi, Viet Nam, Test nhe! Le Qui Don
Group: 140208734485424
PUB: 02019B9975D42449C1825298C47C8DD75E2D5E9B5B4189146A9F427316D6B54D49BBE67893636BDB443889F775A46F09D85E9E41127D041A12EC2F495FCB985DE89AA4
PRIV: 01B334414AE04EB507812455EE1EBAB48594C46FED2913D294E0748B047990CD4C0946DB3FC61E547B6DEB7F26479EC4C2F8C13D35C28E3FE132D2F16D9A3B091FCD
Decrytion: Ha Noi, Viet Nam, Test nhe! Le Qui Don
=====
Pari-GP has elliptic curve functions and their source code is accessible.
So, you can try at:
http://pari.math.u-bordeaux.fr/download.html
I am trying to implement the ECC by using GMP library. I will share it after I have done.
The easiest way is through Pari/GP and Sage. The latter is Python based so it's relatevely easy to quickly work with it. However, if you are looking for performance look for MIRACL which is for C/C++ . For Java you have Bouncy Castle.
If you are new to this, then definitely go for Sage and grap this beauty "Introduction to Cryptography with Open-Source Software".
sagemath.org
www.certivox.com/miracl/
https://www.bouncycastle.org
https://www.crcpress.com/product/isbn/9781439825709
USe Pycrypto the python cryptographic tool kit. Python provides a good platform for text processing. In cryptography always we work with strings. Pycrypto is open source toolkit with more features for cryptographic functionalities.
Hi Ta Minh Thanh,
I have seen your request for quite a while now and didn't answer yet because I had some downloads to Hanoi about a year ago and simply had assumed, this was you and you know Academic Signature already.
Just in case the guest on my pages from Hanoi had been someone else, let me give you the link:
https://www.fh-wedel.de/~an/crypto/Academic_signature_eng.html
Or just google "open source elliptic curve cryptography".
My code is in C++ though.
I wish you all the best for your research.
Regards
Michael Anders
There is also a nice compilation of ECC sources on:
http://techsecguru.blogspot.fi/2015/08/elliptic-curve-cryptograpy-ecc-implementations.html?m=1
try the following link may help
http://openocd.org/doc-release/doxygen/ecc_8c_source.html
The open source Implementation "Academic Signature" (source code & binaries) has migrated to:
https://www.academic-signature.org
https://www.johannes-bauer.com/compsci/ecc/
http://fm4dd.com/openssl/eckeycreate.htm
https://github.com/Yash0day/ElgamalEncryption-using-ECC
You can use my API for implementing Elgamal encryption using ECC. It is very simple to you in your application.
Many implementations can be found here!
https://gist.github.com/artjomb/f2d720010506569d3a39
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