urlencode说白了就是字符串替换，用php实现很easy，用脚本来就相对比较麻烦。先看一下这个脚本：
source $1
id=$2
pass=$3
nonce=0
pa=`echo "$nonce$pass" | openssl rsautl -encrypt -inkey test.pub -pubin |openssl base64`
function encodeurl()
{
encoded_str=`echo "$*" | awk 'BEGIN {
split ("1 2 3 4 5 6 7 8 9 A B C D E F", hextab, " ")
hextab [0] = 0
for (i=1; i<=255; ++i) {
ord [ sprintf ("%c", i) "" ] = i + 0
}
}
{
encoded = ""
for (i=1; i<=length($0); ++i) {
c = substr ($0, i, 1)
if ( c ~ /[a-zA-Z0-9.-]/ ) {
encoded = encoded c # safe character
} else if ( c == " " ) {
encoded = encoded "+" # special handling
} else {
# unsafe character, encode it as a two-digit hex-number
lo = ord [c] % 16
hi = int (ord [c] / 16);
encoded = encoded "%" hextab [hi] hextab [lo]
}
}
print encoded
}' 2>/dev/null`
}
encodeurl $pa
p=$encoded_str
postdata="id=$id&p=$p"
curl $phpurl/index.php/login -d $postdata
id和pass是用户名和密码，经过公钥和base64加密后再进行urlencode，用法就是encodeurl $pa然后取函数体中的$encoded_str就行了。