33 lines
1,010 B
Bash
Executable file
33 lines
1,010 B
Bash
Executable file
#!/bin/bash
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# Input file containing the SSH public keys
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key_file=$1
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# Read the file line by line
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while IFS= read -r line; do
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# Skip empty lines
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if [ -z "$line" ]; then
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continue
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fi
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# Trim leading/trailing whitespace (preserving the key and comment structure)
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trimmed_line=$(echo "$line" | xargs)
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# Validate the SSH key format:
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# Starts with ssh-<type>, followed by base64-encoded data, and an optional comment
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echo $key_file
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if ! echo "$trimmed_line" | grep -Eq '^ssh-(rsa|ed25519|dss|ecdsa) [A-Za-z0-9+/=]+ ?.*$'; then
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echo "Invalid key format: $line"
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exit 1
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fi
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# Ensure there is only one key on the line: a valid key should only have one space separating key data from the comment
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space_count=$(echo "$trimmed_line" | grep -o ' ' | wc -l)
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if [ "$space_count" -gt 2 ]; then
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echo "Invalid: Multiple keys found on the same line"
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exit 1
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fi
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done < "$key_file"
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echo "All keys are valid and correctly formatted."
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