awk - Echo valid certificate file from single line variable with bash

Awk - Echo valid certificate file from single line variable with bash

To echo a valid certificate file from a single-line variable using awk in Bash, you can use awk to extract the certificate content based on a delimiter or pattern that marks the start and end of the certificate content. Here's a general approach:

Example Scenario

Assume you have a variable cert_variable that contains the certificate content as a single line.

cert_variable="-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----"

Using awk to Extract Certificate Content

Assuming the certificate content starts with -----BEGIN CERTIFICATE----- and ends with -----END CERTIFICATE-----, you can use awk to extract and echo the content:

echo "$cert_variable" | awk '/-----BEGIN CERTIFICATE-----/,/-----END CERTIFICATE-----/'

Explanation:

  • echo "$cert_variable": Outputs the content of the variable cert_variable.
  • awk '/-----BEGIN CERTIFICATE-----/,/-----END CERTIFICATE-----/': Searches for lines between -----BEGIN CERTIFICATE----- and -----END CERTIFICATE----- and prints them.

This awk command effectively extracts the certificate content from the single-line variable cert_variable and echoes it to the standard output. Adjust the pattern in awk if your delimiter or structure differs.

Examples

  1. Bash AWK Extract and Print Valid Certificate

    • Description: Use AWK in a bash script to extract and print a valid certificate from a single-line variable.
    • Code:
      cert_var="-----BEGIN CERTIFICATE-----MII...-----END CERTIFICATE-----"
echo "$cert_var" | awk 'BEGIN { RS="-----END CERTIFICATE-----" } { print $0 "-----END CERTIFICATE-----" }'

  2. AWK Extract Certificate from Single Line in Bash

    • Description: Extract and print a valid certificate using AWK when the certificate is in a single-line variable in a bash script.
    • Code:
      cert_var="-----BEGIN CERTIFICATE-----MII...-----END CERTIFICATE-----"
echo "$cert_var" | awk 'BEGIN { RS="-----END CERTIFICATE-----" } /-----BEGIN CERTIFICATE-----/ { print $0 RS }'

  3. Bash AWK Split Certificate Variable to Multiple Lines

    • Description: Split a single-line certificate variable into multiple lines using AWK in bash.
    • Code:
      cert_var="-----BEGIN CERTIFICATE-----MII...-----END CERTIFICATE-----"
echo "$cert_var" | awk 'gsub(/-----/, "\n&\n")'

  4. AWK Print Valid Certificate Block from Variable

    • Description: Print the valid certificate block from a single-line variable using AWK in a bash script.
    • Code:
      cert_var="-----BEGIN CERTIFICATE-----MII...-----END CERTIFICATE-----"
echo "$cert_var" | awk '{ gsub(/(-----BEGIN CERTIFICATE-----|-----END CERTIFICATE-----)/, "\n&\n"); print }'

  5. Extract and Validate Certificate Using AWK and Bash

    • Description: Validate and extract a certificate from a single-line variable using AWK in bash.
    • Code:
      cert_var="-----BEGIN CERTIFICATE-----MII...-----END CERTIFICATE-----"
echo "$cert_var" | awk 'BEGIN { RS="-----END CERTIFICATE-----" } { if (/-----BEGIN CERTIFICATE-----/) print $0 RS }'

  6. Bash AWK Handle Single Line Certificate Variable

    • Description: Use AWK in bash to handle and format a single-line certificate variable into a valid multi-line certificate.
    • Code:
      cert_var="-----BEGIN CERTIFICATE-----MII...-----END CERTIFICATE-----"
echo "$cert_var" | awk '{ gsub(/(-----BEGIN CERTIFICATE-----|-----END CERTIFICATE-----)/, "\n&\n"); print; }'

  7. AWK Extract Certificate Content from Bash Variable

    • Description: Extract the certificate content from a single-line bash variable using AWK.
    • Code:
      cert_var="-----BEGIN CERTIFICATE-----MII...-----END CERTIFICATE-----"
echo "$cert_var" | awk '{ gsub(/-----BEGIN CERTIFICATE-----|-----END CERTIFICATE-----/, "\n&\n"); print }'

  8. Bash Script AWK Extract Certificate from Single Line

    • Description: Extract a valid certificate from a single-line variable using AWK in a bash script.
    • Code:
      cert_var="-----BEGIN CERTIFICATE-----MII...-----END CERTIFICATE-----"
echo "$cert_var" | awk 'BEGIN { RS="-----END CERTIFICATE-----" } /-----BEGIN CERTIFICATE-----/ { print $0 RS }'

  9. Format Single Line Certificate Variable with AWK in Bash

    • Description: Format a single-line certificate variable to multiple lines using AWK in a bash script.
    • Code:
      cert_var="-----BEGIN CERTIFICATE-----MII...-----END CERTIFICATE-----"
echo "$cert_var" | awk '{ gsub(/-----BEGIN CERTIFICATE-----|-----END CERTIFICATE-----/, "\n&\n"); print }'

  10. Extract and Print Multi-line Certificate from Single Line Variable Using AWK

    • Description: Use AWK in bash to extract and print a multi-line certificate from a single-line variable.
    • Code:
      cert_var="-----BEGIN CERTIFICATE-----MII...-----END CERTIFICATE-----"
echo "$cert_var" | awk 'BEGIN { RS="-----END CERTIFICATE-----" } /-----BEGIN CERTIFICATE-----/ { print $0 RS }'

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