AttributeError: dlsym(0x7fe512579830, EVP_CIPHER_CTX_reset): symbol not found

Question

I'm trying to use this package pywebpush, but I'm getting this error:

AttributeError: dlsym(0x7fe512579830, EVP_CIPHER_CTX_reset): symbol not found

This is the entire traceback:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/site-packages/pywebpush/__init__.py", line 15, in <module>
    import http_ece
  File "/usr/local/lib/python2.7/site-packages/http_ece/__init__.py", line 12, in <module>
    from pyelliptic import ecc
  File "/usr/local/lib/python2.7/site-packages/pyelliptic/__init__.py", line 43, in <module>
    from .openssl import OpenSSL
  File "/usr/local/lib/python2.7/site-packages/pyelliptic/openssl.py", line 310, in <module>
    OpenSSL = _OpenSSL(libname)
  File "/usr/local/lib/python2.7/site-packages/pyelliptic/openssl.py", line 144, in __init__
    self.EVP_CIPHER_CTX_reset = self._lib.EVP_CIPHER_CTX_reset
  File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py", line 375, in __getattr__
    func = self.__getitem__(name)
  File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py", line 380, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: dlsym(0x7fe512579830, EVP_CIPHER_CTX_reset): symbol not found

How can I fix this?

Answer 1

It seems that pyelliptic 1.5.8 has a bug. You might be able to fix it by downgrading to 1.5.7:

pip install pyelliptic==1.5.7

pyelliptic is actually deprecated, so avoid it if you can help it. Try uninstalling it with pip uninstall pyelliptic and then see if you broke any dependencies by running pip check.