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* Adding check-legacy-links-format workflow * Adding test-link-rewrites workflow * Migrating links to new format * Updating docs-content-check-legacy-links-format hash * chore: update source * Update generated partials from Packer plugin SDK * Bump packer-plugin-sdk to get latest packer-sdc * Update website/content/docs/templates/hcl_templates/blocks/build/provisioner.mdx * Update Plugin SDK to fix shell-local regression --------- Co-authored-by: Kendall Strautman <[email protected]> Co-authored-by: Wilken Rivera <[email protected]> Co-authored-by: Kendall Strautman <[email protected]>
37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
---
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page_title: base64decode - Functions - Configuration Language
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description: The base64decode function decodes a string containing a base64 sequence.
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---
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# `base64decode` Function
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`base64decode` takes a string containing a Base64 character sequence and
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returns the original string.
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Packer uses the "standard" Base64 alphabet as defined in
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[RFC 4648 section 4](https://tools.ietf.org/html/rfc4648#section-4).
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Strings in the Packer language are sequences of unicode characters rather
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than bytes, so this function will also interpret the resulting bytes as
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UTF-8. If the bytes after Base64 decoding are _not_ valid UTF-8, this function
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produces an error.
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While we do not recommend manipulating large, raw binary data in the Packer
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language, Base64 encoding is the standard way to represent arbitrary byte
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sequences, and so resource types that accept or return binary data will use
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Base64 themselves, which avoids the need to encode or decode it directly in
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most cases. Various other functions with names containing "base64" can generate
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or manipulate Base64 data directly.
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## Examples
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```shell-session
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> base64decode("SGVsbG8gV29ybGQ=")
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Hello World
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```
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## Related Functions
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- [`base64encode`](/packer/docs/templates/hcl_templates/functions/encoding/base64encode) performs the opposite operation,
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encoding the UTF-8 bytes for a string as Base64.
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