如何获取.ssh / authorized_keys（2）文件的所有指纹

有没有一种简单的方法来获取在.ssh / authorized_keys ||中输入的所有指纹的列表。.ssh / authorized_keys2文件？

ssh-keygen -l -f .ssh/authorized_keys 

只返回第一行/条目/公钥的指纹

用awk破解：

awk 'BEGIN { 
    while (getline < ".ssh/authorized_keys") {
        if ($1!~"ssh-(r|d)sa") {continue}
        print "Fingerprint for "$3
        system("echo " "\""$0"\"> /tmp/authorizedPublicKey.scan; \
            ssh-keygen -l -f /tmp/authorizedPublicKey.scan; \
            rm /tmp/authorizedPublicKey.scan"
        )
    }
}'

但是我没有找到更简单的方法或ssh命令吗？

这是另一种使用纯bash的临时文件，其中没有临时文件：

while read l; do
  [[ -n $l && ${l###} = $l ]] && ssh-keygen -l -f /dev/stdin <<<$l;
done < .ssh/authorized_keys

您可以轻松地使其成为您的函数.bashrc：

function fingerprints() {
  local file="${1:-$HOME/.ssh/authorized_keys}"
  while read l; do
    [[ -n $l && ${l###} = $l ]] && ssh-keygen -l -f /dev/stdin <<<$l
  done < "${file}"
}

并调用：

$ fingerprints .ssh/authorized_keys

这是一种可移植的方式，用于显示给定文件的所有关键指纹，并在Mac和Linux上进行了测试：

#!/bin/bash

fingerprint_keys()
{
    if (( $# != 1 )); then
        echo "Usage: ${FUNCNAME} <authorized keys file>" >&2
        return 1
    fi

    local file="$1"
    if [ ! -r "$file" ]; then
        echo "${FUNCNAME}: File '${file}' does not exist or isn't readable." >&2
        return 1
    fi

    # Must be declared /before/ assignment, because of bash weirdness, in
    # order to get exit code in $?.
    local TMPFILE

    TEMPFILE=$(mktemp -q -t "$0.XXXXXXXXXX")
    if (( $? != 0 )); then
        echo "${FUNCNAME}: Can't create temporary file." >&2
        return 1
    fi

    while read line; do
        # Make sure lone isn't a comment or blank.
        if [[ -n "$line" ]] && [ "${line###}" == "$line" ]; then
            # Insert key into temporary file (ignoring noclobber).
            echo "$line" >| "$TEMPFILE"

            # Fingerprint time.
            ssh-keygen -l -f "$TEMPFILE"

            # OVerwrite the file ASAP (ignoring noclobber) to not leave keys
            # sitting in temp files.
            >| "$TEMPFILE"
        fi
    done < "$file"

    rm -f "$TEMPFILE"
    if (( $? != 0 )); then
        echo "${FUNCNAME}: Failed to remove temporary file." >&2
        return 1
    fi
}

用法示例：

bash $ fingerprint_keys ~/.ssh/authorized_keys
2048 xx:xx:xx:xx:xx:xx:xx:xx:bb:xx:xx:xx:xx:xx:xx:xx  x@x.local (RSA)
bash $ 

基于ℝaphink的答案和man xargs的/ dev / stdin技巧的单行代码→示例：

egrep '^[^#]' ~/.ssh/authorized_keys | xargs -n1 -I% bash -c 'ssh-keygen -l -f /dev/stdin <<<"%"'