python - 在 Docker Alpine Linux 3.3 中无法使用 OpenSSL 1.0.2g 和 Python 2.7 出现 "pip install cryptography"

Question

已解决 哇，这些家伙真快……基本上就是这个https://github.com/pyca/cryptography/issues/2750事实证明，openssl 的安全更新已发布(DROWN 攻击)，该更新包含意外的函数签名更改，导致不兼容，所以这对我来说只是运气不好。

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我需要在运行 Alpine Linux 的 Docker 容器中使用 pip install cryptography。实际上，它是另一个模块，service_identity，但问题出在 cryptography 模块，这是一个依赖。

我有以下 Dockerfile

FROM alpine:3.3

RUN apk --update add build-base libffi-dev openssl-dev python-dev py-pip
RUN pip install cryptography

失败并出现以下错误

generating cffi module 'build/temp.linux-x86_64-2.7/_openssl.c'
building '_openssl' extension
creating build/temp.linux-x86_64-2.7/build
creating build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7
gcc -fno-strict-aliasing -Os -fomit-frame-pointer -DNDEBUG -Os -fomit-frame-pointer -fPIC -I/usr/include/python2.7 -c build/temp.linux-x86_64-2.7/_openssl.c -o build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7/_openssl.o
build/temp.linux-x86_64-2.7/_openssl.c:726:6: error: conflicting types for 'BIO_new_mem_buf'
 BIO *BIO_new_mem_buf(void *, int);
      ^
In file included from /usr/include/openssl/asn1.h:65:0,
                 from build/temp.linux-x86_64-2.7/_openssl.c:434:
/usr/include/openssl/bio.h:692:6: note: previous declaration of 'BIO_new_mem_buf' was here
 BIO *BIO_new_mem_buf(const void *buf, int len);
      ^
error: command 'gcc' failed with exit status 1

openssl 1.0.2g 于 2016-03-01(昨天)发布，并且 alpine 包已经更新到该版本。会不会跟这个有关？

我该如何解决这个问题？也许我可以设置一些环境变量？

更新 我一直在检查 GitHub Repo 中的 openssl，实际上是 openssl/bio 的 BIO *BIO_new_mem_buf(void *buf, int len) .h 在 1.0.2f 到 1.0.2g 的过渡期间更改为 BIO *BIO_new_mem_buf(const void *buf, int len)(在 https://github.com/openssl/openssl/compare/OpenSSL_1_0_2f...OpenSSL_1_0_2g 中搜索“BIO_new_mem_buf”)。我不知道这个 openssl/asn1.h 是从哪里来的，它正在导入一个过时版本的 openssl/bio.h，因为它看起来不像openssl 仓库中的一个。有什么想法吗？

好的，我看到有些人已经在着手解决这个问题: https://github.com/pyca/cryptography/issues/2750

Answer 1

对于那些在 Alpine 3.7 中安装 cryptography==2.1.4 仍然遇到问题的人，如下所示:

writing manifest file 'src/cryptography.egg-info/SOURCES.txt'
running build_ext
generating cffi module 'build/temp.linux-x86_64-2.7/_padding.c'
creating build/temp.linux-x86_64-2.7
generating cffi module 'build/temp.linux-x86_64-2.7/_constant_time.c'
generating cffi module 'build/temp.linux-x86_64-2.7/_openssl.c'
building '_openssl' extension
creating build/temp.linux-x86_64-2.7/build
creating build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7
gcc -fno-strict-aliasing -Os -fomit-frame-pointer -g -DNDEBUG -Os -fomit-frame-pointer -g -DTHREAD_STACK_SIZE=0x100000 -fPIC -I/usr/include/python2.7 -c build/temp.linux-x86_64-2.7/_openssl.c -o build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7/_openssl.o -Wconversion -Wno-error=sign-conversion
build/temp.linux-x86_64-2.7/_openssl.c:493:30: fatal error: openssl/opensslv.h: No such file or directory
 #include <openssl/opensslv.h>
                              ^
compilation terminated.
error: command 'gcc' failed with exit status 1

解决方案

在 Alpine 容器中安装这些依赖项:

$ apk add --no-cache libressl-dev musl-dev libffi-dev

要使用 Dockerfile 安装这些依赖项:

RUN apk add --no-cache \
        libressl-dev \
        musl-dev \
        libffi-dev && \
    pip install --no-cache-dir cryptography==2.1.4 && \
    apk del \
        libressl-dev \
        musl-dev \
        libffi-dev

引用

Alpine 上cryptography 的安装说明可以在这里找到:

• https://cryptography.io/en/latest/installation/#building-cryptography-on-linux
• 撰写本文时的版本 is available on github

相关部分如下:

Building cryptography on Linux

[skipping over the part for non-Alpine Linux] …

$ pip install cryptography

If you are on Alpine or just want to compile it yourself then cryptography requires a compiler, headers for Python (if you're not using pypy), and headers for the OpenSSL and libffi libraries available on your system.

Alpine

Replace python3-dev with python-dev if you're using Python 2.

$ sudo apk add gcc musl-dev python3-dev libffi-dev openssl-dev

If you get an error with openssl-dev you may have to use libressl-dev.