toxeus/go-secp256k1

Go wrapper for secp256k1

secp256k1 bindings for Go

General info

The Go API mirrors the API of the C implementation. Therefore, please consult c-secp256k1/include/secp256k1.h for documentation. Going forward I plan to implement a new API that is more aligned with the APIs from Go's standard lib crypto packages. Then, it makes more sense to add a standalone documentation, and hopefully breaking changes in the C implementation can be abstracted away.

How to get and build

go get -d github.com/toxeus/go-secp256k1
cd $GOPATH/src/github.com/toxeus/go-secp256k1
git submodule update --init # not needed for Go >= 1.6
cd c-secp256k1
./autogen.sh && ./configure && make
cd ..
go install

How to update

cd $GOPATH/src/github.com/toxeus/go-secp256k1
git submodule update
cd c-secp256k1
make distclean && ./autogen.sh && ./configure && make
cd ..
go clean && go install

go-secp256k1's Issues

clang error

Thanks for creating this wrapper!
I'm sure this has to do with my lack of understanding in C but when ever I attempt to build my package I receive the following error:

go build server/cmd/main.go                                                                                                                                                                                                          13:08
# github.com/btccom/secp256k1-go/secp256k1
clang: error: no such file or directory: '$GOPATH/src/github.com/btccom/secp256k1-go/secp256k1/c-secp256k1/.libs/libsecp256k1.a'

I have followed both the install steps and update steps but seeing the same issue.

Are there any other dependencies or steps I should complete?

binary secp256k1 library fail to work

pkg info secp256k1-0.1.20171222
secp256k1-0.1.20171222
Name : secp256k1
Version : 0.1.20171222
Installed on : Tue Sep 18 03:26:40 2018 CST
Origin : math/secp256k1
Architecture : FreeBSD:11:amd64
Prefix : /usr/local
Categories : security math java
Licenses : MIT
Maintainer : [email protected]
WWW : https://github.com/bitcoin-core/secp256k1
Comment : Optimized C library for EC operations on curve secp256k1
Options :
GMP : on
JAVA : on
Shared Libs required:
libgmp.so.10
Shared Libs provided:
libsecp256k1.so.0
Annotations :
FreeBSD_version: 1101001
repo_type : binary
repository : FreeBSD
Flat size : 749KiB
Description :
An optimized C library for EC operations on curve secp256k1.

This library is a work in progress and is being used to research best practices.
Use at your own risk.

Features:

• secp256k1 ECDSA signing/verification and key generation.
• Adding/multiplying private/public keys.
• Serialization/parsing of private keys, public keys, signatures.
• Constant time, constant memory access signing and pubkey generation.
• Derandomized DSA (via RFC6979 or with a caller provided function.)
• Very efficient implementation.

WWW: https://github.com/bitcoin-core/secp256k1

---

I installed this binary package (both .so and .a) but it won't work with .go code.
The original C code won't compile with my FreeBSD system.
Any idea how to fix this?

go run keys.go 
# github.com/toxeus/go-secp256k1
../go/src/github.com/toxeus/go-secp256k1/secp256k1.go:19:47: could not determine kind of name for C.SECP256K1_START_SIGN
../go/src/github.com/toxeus/go-secp256k1/secp256k1.go:19:20: could not determine kind of name for C.SECP256K1_START_VERIFY
../go/src/github.com/toxeus/go-secp256k1/secp256k1.go:35:13: could not determine kind of name for C.secp256k1_ec_pubkey_create
../go/src/github.com/toxeus/go-secp256k1/secp256k1.go:48:13: could not determine kind of name for C.secp256k1_ec_pubkey_verify
../go/src/github.com/toxeus/go-secp256k1/secp256k1.go:43:13: could not determine kind of name for C.secp256k1_ec_seckey_verify
../go/src/github.com/toxeus/go-secp256k1/secp256k1.go:55:13: could not determine kind of name for C.secp256k1_ecdsa_sign
../go/src/github.com/toxeus/go-secp256k1/secp256k1.go:65:13: could not determine kind of name for C.secp256k1_ecdsa_verify
../go/src/github.com/toxeus/go-secp256k1/secp256k1.go:19:2: could not determine kind of name for C.secp256k1_start
../go/src/github.com/toxeus/go-secp256k1/secp256k1.go:23:2: could not determine kind of name for C.secp256k1_stop

I could not Build

Hello,
everything works fine for me until the very last command of the build:

dyn905-164:go-secp256k1 samzan$ go install .
# github.com/samzan/go-secp256k1
clang: error: no such file or directory: '../../../github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a'

I looked around and understand the pb might not be specific to this project, yet I thought perhaps someone ran into the same difficulty and found a solution to it?

Cheers
(I m a 1st yr CS student)

clang failed

Hey, thanks for the great package! I'm having an issue and am not that familiar with c. Here's what I get when I run a project that relies on yours. I believe I've installed correctly, but maybe not.

/Users/adamhanna/.gvm/gos/go1.9.2/pkg/tool/darwin_amd64/link: running clang failed: exit status 1
duplicate symbol _secp256k1_ec_seckey_verify in:
    /var/folders/58/kcjf330j6lj2vpc15phlcm_80000gn/T/go-link-660121775/000002.o
    /Users/adamhanna/Desktop/goLang/src/github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a(libsecp256k1_la-secp256k1.o)
duplicate symbol _secp256k1_ecdsa_verify in:
    /var/folders/58/kcjf330j6lj2vpc15phlcm_80000gn/T/go-link-660121775/000002.o
    /Users/adamhanna/Desktop/goLang/src/github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a(libsecp256k1_la-secp256k1.o)
duplicate symbol _secp256k1_nonce_function_default in:
    /var/folders/58/kcjf330j6lj2vpc15phlcm_80000gn/T/go-link-660121775/000002.o
    /Users/adamhanna/Desktop/goLang/src/github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a(libsecp256k1_la-secp256k1.o)
duplicate symbol _secp256k1_ecdsa_sign in:
    /var/folders/58/kcjf330j6lj2vpc15phlcm_80000gn/T/go-link-660121775/000002.o
    /Users/adamhanna/Desktop/goLang/src/github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a(libsecp256k1_la-secp256k1.o)
duplicate symbol _secp256k1_ec_privkey_tweak_mul in:
    /var/folders/58/kcjf330j6lj2vpc15phlcm_80000gn/T/go-link-660121775/000002.o
    /Users/adamhanna/Desktop/goLang/src/github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a(libsecp256k1_la-secp256k1.o)
duplicate symbol _secp256k1_ec_pubkey_tweak_mul in:
    /var/folders/58/kcjf330j6lj2vpc15phlcm_80000gn/T/go-link-660121775/000002.o
    /Users/adamhanna/Desktop/goLang/src/github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a(libsecp256k1_la-secp256k1.o)
duplicate symbol _secp256k1_ec_pubkey_create in:
    /var/folders/58/kcjf330j6lj2vpc15phlcm_80000gn/T/go-link-660121775/000002.o
    /Users/adamhanna/Desktop/goLang/src/github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a(libsecp256k1_la-secp256k1.o)
duplicate symbol _secp256k1_ec_privkey_tweak_add in:
    /var/folders/58/kcjf330j6lj2vpc15phlcm_80000gn/T/go-link-660121775/000002.o
    /Users/adamhanna/Desktop/goLang/src/github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a(libsecp256k1_la-secp256k1.o)
duplicate symbol _secp256k1_ec_pubkey_tweak_add in:
    /var/folders/58/kcjf330j6lj2vpc15phlcm_80000gn/T/go-link-660121775/000002.o
    /Users/adamhanna/Desktop/goLang/src/github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a(libsecp256k1_la-secp256k1.o)
duplicate symbol _secp256k1_nonce_function_rfc6979 in:
    /var/folders/58/kcjf330j6lj2vpc15phlcm_80000gn/T/go-link-660121775/000002.o
    /Users/adamhanna/Desktop/goLang/src/github.com/toxeus/go-secp256k1/c-secp256k1/.libs/libsecp256k1.a(libsecp256k1_la-secp256k1.o)
ld: 10 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)