我在Ubuntu 14.04盒子上运行openvpn。设置很好，直到OpenSSL升级，然后当我尝试使用easy-rsa创建新的客户端证书时，我收到了这样的消息：
root@:easy-rsa# ./pkitool onokun
Using Common Name: onokun
Generating a 2048 bit RSA private key
.+++
........+++
writing new private key to 'onokun.key'
-----
Using configuration from /etc/openvpn/easy-rsa/openssl-1.0.0.cnf
Error Loading extension section usr_cert
3074119356:error:0E06D06C:configuration file routines:NCONF_get_string:no value:conf_lib.c:335:group=CA_default name=email_in_dn
3074119356:error:2207507C:X509 V3 routines:v2i_GENERAL_NAME_ex:missing value:v3_alt.c:537:
3074119356:error:22098080:X509 V3 routines:X509V3_EXT_nconf:error in extension:v3_conf.c:93:name=subjectAltName, value=onokun
此问题与报告的错误不同，即which opensslcnf脚本无法找到要使用的openssl.cnf的匹配版本（上面的消息显示为openssl-1.0.0.cnf）。我进行了Google搜索，但未找到答案。
以下是一些环境信息：
## openvpn
OpenVPN 2.3.2 i686-pc-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [PKCS11] [eurephia] [MH] [IPv6] built on Feb 4 2014
Originally developed by James Yonan
## openssl
OpenSSL 1.0.1f 6 Jan 2014
## dpkg --get-selections | grep ssl
libgnutls-openssl27:i386 install
libio-socket-ssl-perl install
libnet-smtp-ssl-perl install
libnet-ssleay-perl install
libssl-dev:i386 install
libssl-doc install
libssl0.9.8:i386 install
libssl1.0.0:i386 install
openssl install
ssl-cert install
我应该怎样解决这个问题？谢谢，
答案 0 :(得分：6)
Using configuration from /etc/openvpn/easy-rsa/openssl-1.0.0.cnf Error Loading extension section usr_cert
我没有/etc/openvpn/easy-rsa/openssl-1.0.0.cnf，所以请带上一粒盐......
opensslconf.h
openssl-1.0.1h$ grep -R usr_cert *
apps/openssl-vms.cnf:x509_extensions = usr_cert # The extensions to add to the cert
apps/openssl-vms.cnf:[ usr_cert ]
apps/openssl.cnf:x509_extensions = usr_cert # The extensions to add to the cert
apps/openssl.cnf:[ usr_cert ]
您可以恢复/etc/openvpn/easy-rsa/openssl-1.0.0.cnf的旧版本吗？
以下是apps/openssl.cnf的部分。如果缺少RSA的配置文件，您可以考虑将其添加到Easy RSA的配置文件中。首先，尝试一个空的部分。然后尝试添加原始代码。
[ usr_cert ]
# These extensions are added when 'ca' signs a request.
# This goes against PKIX guidelines but some CAs do it and some software
# requires this to avoid interpreting an end user certificate as a CA.
basicConstraints=CA:FALSE
# Here are some examples of the usage of nsCertType. If it is omitted
# the certificate can be used for anything *except* object signing.
# This is OK for an SSL server.
# nsCertType = server
# For an object signing certificate this would be used.
# nsCertType = objsign
# For normal client use this is typical
# nsCertType = client, email
# and for everything including object signing:
# nsCertType = client, email, objsign
# This is typical in keyUsage for a client certificate.
# keyUsage = nonRepudiation, digitalSignature, keyEncipherment
# This will be displayed in Netscape's comment listbox.
nsComment = "OpenSSL Generated Certificate"
# PKIX recommendations harmless if included in all certificates.
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid,issuer
# This stuff is for subjectAltName and issuerAltname.
# Import the email address.
# subjectAltName=email:copy
# An alternative to produce certificates that aren't
# deprecated according to PKIX.
# subjectAltName=email:move
# Copy subject details
# issuerAltName=issuer:copy
#nsCaRevocationUrl = http://www.domain.dom/ca-crl.pem
#nsBaseUrl
#nsRevocationUrl
#nsRenewalUrl
#nsCaPolicyUrl
#nsSslServerName
# This is required for TSA certificates.
# extendedKeyUsage = critical,timeStamping
答案 1 :(得分：6)
通过比较没有此问题的早期Ubuntu 14.04安装，似乎具体问题是“subjectAltName”。我没有读到它的作用，但下面的命令将修复你的“openssl-1.0.0.cnf”文件：
perl -p -i -e 's|^(subjectAltName=)|#$1|;' /etc/openvpn/easy-rsa/openssl-1.0.0.cnf
我应该提交错误报告。
答案 2 :(得分：3)
我终于得到了他的工作（在我的机器上）首先我的设置有点不同，我在Windows10上运行OpenSSL 1.0.2h。我正在尝试为测试生成多个证书，CA和其他东西，我收到错误：
configuration file routines:NCONF_get_string:no value:.\crypto\conf\conf_lib.c:324:group=CA_default name=email_in_dn
要解决此问题，我发现将 email_in_dn = no 条目放在CA_Default openssl.cfg部分中，如下所示
####################################################################
[ CA_default ]
dir = ./demoCA # Where everything is kept
certs = $dir/certs # Where the issued certs are kept
crl_dir = $dir/crl # Where the issued crl are kept
database = $dir/index.txt # database index file.
new_certs_dir = $dir/newcerts # default place for new certs.
certificate = $dir/ca.crt # The CA certificate
serial = $dir/serial # The current serial number
crl = $dir/crl.pem # The current CRL
private_key = $dir/private/caprivkey.pem# The private key
RANDFILE = $dir/private/.rand # private random number file
x509_extensions = usr_cert # The extentions to add to the cert
email_in_dn = no # <-- fixes CONF_get_string:no value
我希望这有助于其他人。
答案 3 :(得分：1)
这是作为Ubuntu中的错误提交的。请参阅SSL certificate creation crashes without subjectAltName。
Yuriy描述的解决方案似乎有效（从启动板复制）：
文件/ usr / share / easy-rsa / pkitool 中的
只需替换表达式：
KEY_ALTNAMES =＆＃34; $ KEY_CN＆＃34;
为：
KEY_ALTNAMES =＆＃34; DNS：$ {KEY_CN}＆＃34;
在我的文件版本中，这是第284行，就在字符串＆＃34;使用通用名称＆＃34;
之后答案 4 :(得分：0)
要摆脱这个错误：
3074119356:error:0E06D06C:configuration file routines:NCONF_get_string:no value:conf_lib.c:335:group=CA_default name=email_in_dn
使用
-noemailDN
在openssl命令中。
例如：
$ openssl ca -batch -config openssl.cnf -extensions usr_cert -noemailDN -days 375 -notext -md sha256 -in csr/www.example8.com.csr.pem -out certs/www.example8.com.cert.pem -verbose -passin pass:changeit