用shell写了一个查看apk签名的脚本。代码很少也很简单 
 
#!/bin/bash 
mkdir .temp_for_certificate 
cd .temp_for_certificate 
count=0 
while [ -n "$1" ] 
do 
count=$[$count+1] 
echo "(#$count) "`basename "$1"`":" 
echo "" 
path=`jar tf "$1" | grep RSA` #查找apk中RSA文件 
jar xf $1 $path #把RSA文件解压出来 
keytool -printcert -file $path #查看指纹证书 
rm -r $path #删除之前解压的文件 
echo "--------------------------------------------" 
shift 
done 
cd .. 
rm -r .temp_for_certificate 
 (将其保存到文件,命名为getcertificate) 
使用方法: 
 
getcertificate Superuser.apk Skype3.0.apk 
 输出: 
 
(#1) Superuser.apk: 
所有者:CN=Adam Shanks, OU=Android, O=SoupCoconut, L=FWB, ST=Florida, C=US 
签发人:CN=Adam Shanks, OU=Android, O=SoupCoconut, L=FWB, ST=Florida, C=US 
序列号:4c614057 
有效期: Tue Aug 10 20:04:39 CST 2010 至Sat Dec 26 20:04:39 CST 2037 
证书指纹: 
MD5:D2:42:30:AA:BE:81:62:30:FE:B4:0E:F1:CF:11:B0:C0 
SHA1:5F:11:3F:C2:C2:0A:7C:9B:D9:28:19:22:6A:32:A1:90:4B:75:EF:8B 
签名算法名称:SHA1withRSA 
版本: 3 
-------------------------------------------- 
(#2) Skype3.0.apk: 
所有者:CN=Skype, OU=Mobile Client, O=Skype, L=London, C=GB 
签发人:CN=Skype, OU=Mobile Client, O=Skype, L=London, C=GB 
序列号:4c0e1962 
有效期: Tue Jun 08 18:20:18 CST 2010 至Fri Jul 20 18:20:18 CST 2040 
证书指纹: 
MD5:37:5F:1A:56:C5:2A:51:FF:35:F3:6C:C5:A6:69:54:EC 
SHA1:77:18:07:D1:B8:41:4D:69:89:E7:D8:EF:0B:97:97:24:3B:93:1F:95 
签名算法名称:SHA1withRSA 
版本: 3 
-------------------------------------------- 
 查看签名也可以使用jarsigner 
 
jarsigner -verify -verbose -certs Superuser.apk 
 jarsigner详细用法详见帮助