gnutls_base64_decode2 - Linux
Overview
gnutls_base64_decode2 is a command-line utility for decoding base64-encoded strings. It employs GnuTLS, a robust cryptographic library, to securely decode base64 strings. This makes it ideal for tasks involving data privacy, authentication, and information security.
Syntax
gnutls_base64_decode2 [options] [file]
Options/Flags
- -b, –breaklines: Output the decoded data with line breaks after every 76 characters.
- -h, –help: Display help and usage information.
- -n, –no-crlf: Remove CR (carriage return) characters from the decoded data.
- -o, –outfile
: Specify an output file to save the decoded data. - -p, –prefix
: Prefix the decoded data with the specified text. - -q, –quiet: Suppress output and only display errors.
- -s, –suffix
: Append the decoded data with the specified text.
Examples
Example 1: Simple Base64 Decoding
gnutls_base64_decode2 encoded_string
Example 2: Decoding from a File and Saving to Another File
gnutls_base64_decode2 -o decoded_file encoded_file
Example 3: Line Breaks and Custom Prefix/Suffix
gnutls_base64_decode2 -b -p "decoded: " -s " (base64)" encoded_string
Common Issues
- Incorrectly Encoded Input: Ensure the input string is a valid base64 encoding.
- Output File Permission Errors: Verify that you have write permissions to the output file path.
- Malformed Input: If the input string contains invalid characters or is not properly formatted, the decoding will fail.
Integration
gnutls_base64_decode2 can be integrated with scripts or other commands to automate decoding tasks. For instance, you can use it to:
cat encoded_file | gnutls_base64_decode2 | tail -n +2
This command would remove the header line from the encoded file and decode the rest.
Related Commands
- base64: A generic base64 utility without GnuTLS integration.
- openssl base64: Another base64 decoding tool using the OpenSSL library.