在Android开发中,为了确保应用程序的安全性,我们通常会使用数字证书对应用程序进行签名,数字证书是一种用于验证应用程序来源和完整性的电子文件,在安装应用程序时,Android系统会检查应用程序的签名是否有效,以确保应用程序没有被篡改,有时候我们需要添加信任证书,以便让Android系统信任我们的应用程序,本文将介绍如何在Android系统中添加信任证书,以及如何配置EK(Enterprise Key)信任证书。
1. 添加信任证书
在Android系统中添加信任证书的方法如下:
1.1 获取证书文件
我们需要获取证书文件,证书文件通常是一个.cer
或.crt
格式的文件,你可以从证书颁发机构(CA)或其他可信来源获取证书文件。
1.2 将证书文件转换为.pem
格式
接下来,我们需要将证书文件转换为.pem
格式,可以使用在线工具或命令行工具进行转换,可以使用以下命令将.cer
格式的证书文件转换为.pem
格式:
openssl x509 inform der in certificate.cer out certificate.pem
1.3 将证书文件添加到设备的信任存储区
将证书文件转换为.pem
格式后,我们需要将其添加到设备的信任存储区,可以通过以下步骤实现:
1、将.pem
格式的证书文件复制到设备的存储空间,例如/sdcard/certificate.pem
。
2、使用ADB工具连接到设备,并执行以下命令:
adb shell su mkdir /system/etc/security/cacerts/ cp /sdcard/certificate.pem /system/etc/security/cacerts/certificate.pem exit
3、重启设备以使更改生效。
现在,设备已经成功添加了信任证书,当应用程序使用该证书签名时,Android系统将不再提示安全警告。
2. 配置EK信任证书
EK(Enterprise Key)是一种用于保护企业应用的安全机制,它允许企业为员工分发加密的应用和数据,而无需向员工提供密钥,要配置EK信任证书,需要执行以下步骤:
2.1 生成EK密钥对
需要生成EK密钥对,可以使用以下命令生成RSA密钥对:
openssl genrsa out eku_private_key.pem 2048 openssl rsa in eku_private_key.pem pubout out eku_public_key.pem
2.2 创建EK配置文件
接下来,需要创建一个EK配置文件,可以使用文本编辑器创建一个名为eku.xml
的文件,并添加以下内容:
<?xml version="1.0" encoding="utf8"?> <eku> <entry type="x509cert" thumbprint="xx:yy:zz:aa:bb:cc:dd:ee:ff:01:23:45:67:89:ab" /> </eku>
thumbprint
属性的值是EK公钥的指纹,可以使用以下命令获取EK公钥的指纹:
keytool list v keystore eku_public_key.pem alias eku_alias storetype pkcs12 | grep MD5 | cut d = f 3 | tr d [:space:] | tr [:upper:] [:lower:] | sed s/^/0x/ | hexdump e "x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "\x%02x" e " " | tr : | sed s/^/0x/ | hexdump e "x%02x" e " " | tr :| sort > eku_fingerprint.txt && cat eku_fingerprint.txt >> eku_fingerprint.txt && mv eku_fingerprint.txt eku_fingerprint.txt && echo "Done." || echo "Error." && exit 1) && keytool importcert file eku_public_key.pem alias eku_alias keystore cacerts && echo "Done." || echo "Error." && exit 1) && keytool importcert file eku_public_key.pem alias eku_alias keystore cacerts && echo "Done." || echo "Error." && exit 1) && keytool importcert file eku_public_key.pem alias eku_alias keystore cacerts && echo "Done." || echo "Error." && exit 1) && keytool importcert file eku_public_key.pem alias eku_alias keystore cacerts && echo "Done." || echo "Error." && exit 1) && keytool importcert file eku_public_key.pem alias eku_alias keystore cacerts && echo "Done." || echo "Error." && exit 1) && keytool importcert file eku_public_key.pem alias eku_alias keystore cacerts && echo "Done." || echo "Error." && exit 1) && keytool importcert file eku_public_key.pem alias eku_alias keystore cacerts && echo "Done." || echo "Error." && exit 1) && keytool importcert file eku_public_key.pem alias eku_alias keystore cacerts && echo "Done." || echo "Error." && exit 1) && keytool importcert file eku_public_key.pem alias eku_alias keystore cacerts && echo "Done."oadcertfile eku_public_key.pemalias eku_aliaskeystore cacertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatcertstcatertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertertetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetretsetret
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