Replace secp256k1-py with coincurve

docs/INSTALL.md

@@ -24,7 +24,7 @@ is actually newer in version number, than what was there already.
 
 To install everything (client and server), install these packages:
 
-    sudo apt-get install python-dev python-pip git build-essential automake pkg-config libtool libffi-dev libssl-dev
+    sudo apt-get install python-dev python-pip git build-essential automake pkg-config libtool libffi-dev libssl-dev libgmp-dev
 
 (+ `libsodium-dev` if you can find it, else build after)
 

install.sh

@@ -14,7 +14,7 @@ sha256_verify ()
 deps_install ()
 {
     if [[ ${install_os} == 'debian' ]]; then
-        if deb_deps_install "python-virtualenv curl python-dev python-pip build-essential automake pkg-config libtool"; then
+        if deb_deps_install "python-virtualenv curl python-dev python-pip build-essential automake pkg-config libtool libgmp-dev"; then
             return 0
         else
             return 1
@@ -204,7 +204,7 @@ libffi_install ()
     popd
 }
 
-libsecp256k1-py_build ()
+coincurve_build ()
 {
     if [[ -d "${jm_deps}/secp256k1-${secp256k1_version}" ]]; then
         unlink ./libsecp256k1
@@ -216,19 +216,19 @@ libsecp256k1-py_build ()
     return "$?"
 }
 
-secp256k1-py_install ()
+coincurve_install ()
 {
-    secp256k1_py_version='0.13.2.4'
-    secp256k1_py_lib_tar="${secp256k1_py_version}.tar.gz"
-    secp256k1_py_lib_sha='f7920b1b887fe6745c49aebea40cefe867adddf11eb2c164624f1f2729f74657'
-    secp256k1_py_url='https://github.com/ludbb/secp256k1-py/archive'
+    coincurve_version='9.0.0'
+    coincurve_lib_tar="${coincurve_version}.tar.gz"
+    coincurve_lib_sha='81561e954b4a978231e6611ae6153740bfbaebb214caff7a7b4e71fe9affbe09'
+    coincurve_url='https://github.com/ofek/coincurve/archive'
 
-    rm -rf "./secp256k1-py-${secp256k1_py_version}"
-    if ! dep_get "${secp256k1_py_lib_tar}" "${secp256k1_py_lib_sha}" "${secp256k1_py_url}"; then
+    rm -rf "./coincurve-${coincurve_version}"
+    if ! dep_get "${coincurve_lib_tar}" "${coincurve_lib_sha}" "${coincurve_url}"; then
         return 1
     fi
-    pushd "secp256k1-py-${secp256k1_py_version}"
-    if ! libsecp256k1-py_build; then
+    pushd "coincurve-${coincurve_version}"
+    if ! coincurve_build; then
         return 1
     fi
     popd
@@ -250,7 +250,7 @@ libsecp256k1_install ()
     if ! dep_get "${secp256k1_lib_tar}" "${secp256k1_lib_sha}" "${secp256k1_url}"; then
         return 1
     fi
-    if ! secp256k1-py_install; then
+    if ! coincurve_install; then
         return 1
     fi
 }

jmbitcoin/jmbitcoin/__init__.py

@@ -1,4 +1,4 @@
-import secp256k1
+import coincurve as secp256k1
 from jmbitcoin.secp256k1_main import *
 from jmbitcoin.secp256k1_transaction import *
 from jmbitcoin.secp256k1_deterministic import *

jmbitcoin/jmbitcoin/secp256k1_main.py

@@ -5,14 +5,10 @@
 import re
 import sys
 import base64
-import secp256k1
+import coincurve as secp256k1
 
 #Required only for PoDLE calculation:
 N = 115792089237316195423570985008687907852837564279074904382605163141518161494337
-#Global context for secp256k1 operations (helps with performance)
-ctx = secp256k1.lib.secp256k1_context_create(secp256k1.ALL_FLAGS)
-#required for point addition
-dummy_pub = secp256k1.PublicKey(ctx=ctx)
 
 #Standard prefix for Bitcoin message signing.
 BITCOIN_MESSAGE_MAGIC = '\x18' + 'Bitcoin Signed Message:\n'
@@ -103,7 +99,7 @@ def getG(compressed=True):
     representation of secp256k1 G
     """
     priv = "\x00"*31 + "\x01"
-    G = secp256k1.PrivateKey(priv, ctx=ctx).pubkey.serialize(compressed)
+    G = secp256k1.PrivateKey(priv).public_key.format(compressed)
     return G
 
 podle_PublicKey_class = secp256k1.PublicKey
@@ -112,12 +108,12 @@ def getG(compressed=True):
 def podle_PublicKey(P):
     """Returns a PublicKey object from a binary string
     """
-    return secp256k1.PublicKey(P, raw=True, ctx=ctx)
+    return secp256k1.PublicKey(P)
 
 def podle_PrivateKey(priv):
     """Returns a PrivateKey object from a binary string
     """
-    return secp256k1.PrivateKey(priv, ctx=ctx)
+    return secp256k1.PrivateKey(priv)
 
 
 def privkey_to_address(priv, from_hex=True, magicbyte=0):
@@ -290,8 +286,8 @@ def privkey_to_pubkey_inner(priv, usehex):
     and return compressed/uncompressed public key as appropriate.'''
     compressed, priv = read_privkey(priv)
     #secp256k1 checks for validity of key value.
-    newpriv = secp256k1.PrivateKey(privkey=priv, ctx=ctx)
-    return newpriv.pubkey.serialize(compressed=compressed)
+    newpriv = secp256k1.PrivateKey(secret=priv)
+    return newpriv.public_key.format(compressed)
 
 def privkey_to_pubkey(priv, usehex=True):
     '''To avoid changing the interface from the legacy system,
@@ -313,25 +309,20 @@ def multiply(s, pub, usehex, rawpub=True, return_serialized=True):
     of the scalar s.
     ('raw' options passed in)
     '''
-    newpub = secp256k1.PublicKey(pub, raw=rawpub, ctx=ctx)
+    newpub = secp256k1.PublicKey(pub)
     #see note to "tweak_mul" function in podle.py
-    res = secp256k1._tweak_public(newpub,
-                                   secp256k1.lib.secp256k1_ec_pubkey_tweak_mul,
-                                   s)
+    res = newpub.multiply(s)
     if not return_serialized:
         return res
-    return res.serialize()
+    return res.format()
 
 @hexbin
 def add_pubkeys(pubkeys, usehex):
     '''Input a list of binary compressed pubkeys
     and return their sum as a binary compressed pubkey.'''
-    r = secp256k1.PublicKey(ctx=ctx)  #dummy holding object
-    pubkey_list = [secp256k1.PublicKey(x,
-                                       raw=True,
-                                       ctx=ctx).public_key for x in pubkeys]
-    r.combine(pubkey_list)
-    return r.serialize()
+    pubkey_list = [secp256k1.PublicKey(x) for x in pubkeys]
+    r = secp256k1.PublicKey.combine_keys(pubkey_list)
+    return r.format()
 
 @hexbin
 def add_privkeys(priv1, priv2, usehex):
@@ -345,8 +336,8 @@ def add_privkeys(priv1, priv2, usehex):
     else:
         compressed = y[0]
     newpriv1, newpriv2 = (y[1], z[1])
-    p1 = secp256k1.PrivateKey(newpriv1, raw=True, ctx=ctx)
-    res = p1.tweak_add(newpriv2)
+    p1 = secp256k1.PrivateKey(newpriv1)
+    res = p1.add(newpriv2).secret
     if compressed:
         res += '\x01'
     return res
@@ -376,13 +367,12 @@ def ecdsa_raw_sign(msg,
         raise Exception("Invalid hash input to ECDSA raw sign.")
     if rawpriv:
         compressed, p = read_privkey(priv)
-        newpriv = secp256k1.PrivateKey(p, raw=True, ctx=ctx)
+        newpriv = secp256k1.PrivateKey(p)
     else:
-        newpriv = secp256k1.PrivateKey(priv, raw=False, ctx=ctx)
+        newpriv = secp256k1.PrivateKey.from_hex(priv)
     if formsg:
-        sig = newpriv.ecdsa_sign_recoverable(msg, raw=rawmsg)
-        s, rid = newpriv.ecdsa_recoverable_serialize(sig)
-        return chr(31+rid) + s
+        sig = newpriv.sign_recoverable(msg)
+        return sig
     #Donations, thus custom nonce, currently disabled, hence not covered.
     elif usenonce: #pragma: no cover
         raise NotImplementedError
@@ -396,8 +386,11 @@ def ecdsa_raw_sign(msg,
     else:
         #partial fix for secp256k1-transient not including customnonce;
         #partial because donations will crash on windows in the "if".
-        sig = newpriv.ecdsa_sign(msg, raw=rawmsg)
-    return newpriv.ecdsa_serialize(sig)
+        if rawmsg:
+            sig = newpriv.sign(msg, hasher=None)
+        else:
+            sig = newpriv.sign(msg)
+    return sig
 
 @hexbin
 def ecdsa_raw_verify(msg, pub, sig, usehex, rawmsg=False):
@@ -415,9 +408,11 @@ def ecdsa_raw_verify(msg, pub, sig, usehex, rawmsg=False):
     try:
         if rawmsg:
             assert len(msg) == 32
-        newpub = secp256k1.PublicKey(pubkey=pub, raw=True, ctx=ctx)
-        sigobj = newpub.ecdsa_deserialize(sig)
-        retval = newpub.ecdsa_verify(msg, sigobj, raw=rawmsg)
+        newpub = secp256k1.PublicKey(pub)
+        if rawmsg:
+            retval = newpub.verify(sig, msg, hasher=None)
+        else:
+            retval = newpub.verify(sig, msg)
     except:
         return False
     return retval

jmbitcoin/setup.py

@@ -9,5 +9,5 @@
       author_email='',
       license='GPL',
       packages=['jmbitcoin'],
-      install_requires=['future', 'secp256k1',],
+      install_requires=['future', 'coincurve',],
       zip_safe=False)

jmclient/jmclient/podle.py

@@ -58,7 +58,7 @@ def __init__(self,
             if len(priv) == 66 and priv[-2:] == '01':
                 priv = priv[:-2]
             self.priv = podle_PrivateKey(binascii.unhexlify(priv))
-            self.P = self.priv.pubkey
+            self.P = self.priv.public_key
         if P2:
             self.P2 = podle_PublicKey(binascii.unhexlify(P2))
         else:
@@ -83,7 +83,7 @@ def get_commitment(self):
             raise PoDLEError("Cannot construct commitment, no P2 available")
         if not isinstance(self.P2, podle_PublicKey_class):
             raise PoDLEError("Cannot construct commitment, P2 is not a pubkey")
-        self.commitment = hashlib.sha256(self.P2.serialize()).digest()
+        self.commitment = hashlib.sha256(self.P2.format()).digest()
         return binascii.hexlify(self.commitment)
 
     def generate_podle(self, index=0, k=None):
@@ -119,14 +119,14 @@ def generate_podle(self, index=0, k=None):
         if not k:
             k = os.urandom(32)
         J = getNUMS(index)
-        KG = podle_PrivateKey(k).pubkey
-        KJ = multiply(k, J.serialize(), False, return_serialized=False)
+        KG = podle_PrivateKey(k).public_key
+        KJ = multiply(k, J.format(), False, return_serialized=False)
         self.P2 = getP2(self.priv, J)
         self.get_commitment()
-        self.e = hashlib.sha256(''.join([x.serialize(
+        self.e = hashlib.sha256(''.join([x.format(
         ) for x in [KG, KJ, self.P, self.P2]])).digest()
         k_int = decode(k, 256)
-        priv_int = decode(self.priv.private_key, 256)
+        priv_int = decode(self.priv.secret, 256)
         e_int = decode(self.e, 256)
         sig_int = (k_int + priv_int * e_int) % N
         self.s = encode(sig_int, 256, minlen=32)
@@ -142,7 +142,7 @@ def reveal(self):
             self.get_commitment()
         Phex, P2hex, shex, ehex, commit = [
             binascii.hexlify(x)
-            for x in [self.P.serialize(), self.P2.serialize(), self.s, self.e,
+            for x in [self.P.format(), self.P2.format(), self.s, self.e,
                       self.commitment]
         ]
         return {'used': str(self.used),
@@ -180,17 +180,17 @@ def verify(self, commitment, index_range):
             return False
         for J in [getNUMS(i) for i in index_range]:
             sig_priv = podle_PrivateKey(self.s)
-            sG = sig_priv.pubkey
-            sJ = multiply(self.s, J.serialize(), False)
+            sG = sig_priv.public_key
+            sJ = multiply(self.s, J.format(), False)
             e_int = decode(self.e, 256)
             minus_e = encode(-e_int % N, 256, minlen=32)
-            minus_e_P = multiply(minus_e, self.P.serialize(), False)
-            minus_e_P2 = multiply(minus_e, self.P2.serialize(), False)
-            KGser = add_pubkeys([sG.serialize(), minus_e_P], False)
+            minus_e_P = multiply(minus_e, self.P.format(), False)
+            minus_e_P2 = multiply(minus_e, self.P2.format(), False)
+            KGser = add_pubkeys([sG.format(), minus_e_P], False)
             KJser = add_pubkeys([sJ, minus_e_P2], False)
             #check 2: e =?= H(K_G || K_J || P || P2)
-            e_check = hashlib.sha256(KGser + KJser + self.P.serialize() +
-                                     self.P2.serialize()).digest()
+            e_check = hashlib.sha256(KGser + KJser + self.P.format() +
+                                     self.P2.format()).digest()
             if e_check == self.e:
                 return True
         #commitment fails for any NUMS in the provided range
@@ -242,7 +242,7 @@ def verify_all_NUMS(write=False):
     """
     nums_points = {}
     for i in range(256):
-        nums_points[i] = binascii.hexlify(getNUMS(i).serialize())
+        nums_points[i] = binascii.hexlify(getNUMS(i).format())
     if write:
         with open("nums_basepoints.txt", "wb") as f:
             from pprint import pformat
@@ -258,9 +258,9 @@ def getP2(priv, nums_pt):
     just the most easy way to manipulate it in the
     library), calculate priv*nums_pt
     """
-    priv_raw = priv.private_key
+    priv_raw = priv.secret
     return multiply(priv_raw,
-                    nums_pt.serialize(),
+                    nums_pt.format(),
                     False,
                     return_serialized=False)
 

test/Dockerfiles/bionic.Dockerfile

@@ -5,7 +5,7 @@ SHELL ["/bin/bash", "-c"]
 RUN apt-get update
 RUN apt-get install -y build-essential
 RUN apt-get install -y \
-    automake pkg-config libtool
+    automake pkg-config libtool libgmp-dev
 RUN apt-get install -y \
     python-dev python-pip python-virtualenv python-qt4 python-sip
 

test/Dockerfiles/centos7.Dockerfile

@@ -6,7 +6,7 @@ RUN yum -y groups install 'Development tools'
 RUN yum -y install epel-release && \
     yum -y update
 RUN yum -y install \
-    python-devel python2-pip python-virtualenv
+    python-devel python2-pip python-virtualenv gmp-devel
 
 RUN useradd --home-dir /home/chaum --create-home --shell /bin/bash --skel /etc/skel/ chaum
 ARG core_version

test/Dockerfiles/fedora27.Dockerfile

@@ -5,7 +5,7 @@ SHELL ["/bin/bash", "-c"]
 RUN dnf -y groups install 'Development tools'
 RUN dnf -y install \
     autoconf libtool pkgconfig \
-    python-devel python-pip python2-virtualenv
+    python-devel python-pip python2-virtualenv gmp-devel
 
 # needed for build time
 # https://stackoverflow.com/questions/34624428/g-error-usr-lib-rpm-redhat-redhat-hardened-cc1-no-such-file-or-directory

test/Dockerfiles/stretch.Dockerfile

@@ -5,7 +5,7 @@ SHELL ["/bin/bash", "-c"]
 RUN apt-get update
 RUN apt-get install -y build-essential
 RUN apt-get install -y \
-    automake pkg-config libtool
+    automake pkg-config libtool libgmp-dev
 RUN apt-get install -y \
     python-dev python-pip python-virtualenv python-qt4 python-sip
 

test/Dockerfiles/xenial.Dockerfile

@@ -5,7 +5,7 @@ SHELL ["/bin/bash", "-c"]
 RUN apt-get update
 RUN apt-get install -y build-essential
 RUN apt-get install -y \
-    automake pkg-config libtool
+    automake pkg-config libtool libgmp-dev
 RUN apt-get install -y \
     python-dev python-pip python-virtualenv python-qt4 python-sip