我正在创建dkim private&公钥
openssl genrsa -out dkim1024.key 1024
openssl rsa -in dkim1024.key -out dkim1024.pub -pubout -outform PEM
我有一个使用awk提取密钥文件的bash脚本
KEY = /usr/bin/awk’NR> 1 {a [k] = $0} END {for(i = 1; i< k; i)print a [i]}'file.key
file.key内容
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqasdfadaBAQUAA4GNADCBiQKBsdfadsfsDgrKE5D2atbGtaqVmAZwzy1YNY
8pUYgF6qQ4zecRrpk3Uam52asdfafasdasdfasgwYAA0x3roKIYAeHFFrFm9aCS
WKpM+na/03akmpewn4cjT4sm9qTHP0q/VM/YtHy3rGkPj+xzOKgO9rzyZo3E1a1O
HYu6TIqqzlqtadfafafafdas
-----END PUBLIC KEY-----
我需要删除这些行.
—–开始公钥—–
—– END PUBLIC KEY —–
我在我的awk cmd中完成了这个,但当我回显$KEY时有空格.我猜这些是返回字符,但我不知道如何摆脱它们但保留密钥.
sh-3.2# echo $KEY
MIGfMA0GCSqasdfadaBAQUAA4GNADCBiQKBsdfadsfsDgrKE5D2atbGtaqVmAZwzy1YNY 8pUYgF6qQ4zecRrpk3Uam52asdfafasdasdfasgwYAA0x3roKIYAeHFFrFm9aCS WKpM+na/03akmpewn4cjT4sm9qTHP0q/VM/YtHy3rGkPj+xzOKgO9rzyZo3E1a1O HYu6TIqqzlqtadfafafafdas
谢谢
解决方法:
由于word splitting,你得到的是空格而不是行.你应该用双引号引用你的变量
echo "$KEY"
这也可以是一种替代解决方案:
awk '/-END PUBLIC KEY-/ { p = 0 }; p; /-BEGIN PUBLIC KEY-/ { p = 1 }' file.key
输出:
MIGfMA0GCSqasdfadaBAQUAA4GNADCBiQKBsdfadsfsDgrKE5D2atbGtaqVmAZwzy1YNY
8pUYgF6qQ4zecRrpk3Uam52asdfafasdasdfasgwYAA0x3roKIYAeHFFrFm9aCS
WKpM+na/03akmpewn4cjT4sm9qTHP0q/VM/YtHy3rGkPj+xzOKgO9rzyZo3E1a1O
HYu6TIqqzlqtadfafafafdas
即使在块之前或之后存在其他行,该解决方案也将起作用.
您也可以使用Bash本身来完成:
#!/bin/bash
FILE='file.key' ## Or FILE=$1
KEY=()
while IFS=$' \t\r\n' read -r LINE; do
[[ $LINE == *'-END PUBLIC KEY-'* ]] && P=0
(( P )) && KEY+=("$LINE") ## Store every line as an array element.
[[ $LINE == *'-BEGIN PUBLIC KEY-'* ]] && P=1
done < "$FILE"
echo --------------------
printf '%s\n' "${KEY[@]}"
echo --------------------
IFS= eval 'MERGED_KEY="${KEY[*]}"' ## Merge key without spaces.
echo "$MERGED_KEY"
输出:
--------------------
MIGfMA0GCSqasdfadaBAQUAA4GNADCBiQKBsdfadsfsDgrKE5D2atbGtaqVmAZwzy1YNY
8pUYgF6qQ4zecRrpk3Uam52asdfafasdasdfasgwYAA0x3roKIYAeHFFrFm9aCS
WKpM+na/03akmpewn4cjT4sm9qTHP0q/VM/YtHy3rGkPj+xzOKgO9rzyZo3E1a1O
HYu6TIqqzlqtadfafafafdas
--------------------
MIGfMA0GCSqasdfadaBAQUAA4GNADCBiQKBsdfadsfsDgrKE5D2atbGtaqVmAZwzy1YNY8pUYgF6qQ4zecRrpk3Uam52asdfafasdasdfasgwYAA0x3roKIYAeHFFrFm9aCSWKpM+na/03akmpewn4cjT4sm9qTHP0q/VM/YtHy3rGkPj+xzOKgO9rzyZo3E1a1OHYu6TIqqzlqtadfafafafdas
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