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removed "particularly", because for inline signatures, this issue doesn't exist at all. added the "cleartext" case, which is equivalent here.

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Heiko Schaefer 2023-11-14 13:20:14 +01:00
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book/source/07-signing_data.md
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@ -22,8 +22,8 @@ Note that data signatures are distinct from {ref}`component_signatures_chapter`,
OpenPGP data signatures use one of two [signature types](signature_types):
- **Binary signature** (type ID `0x00`): This is the standard signature type for binary data and is typically used for files or data streams. Binary signatures are calculated over the data without any modifications or transformations.
- **Text signature** (type ID `0x01`): Used for textual data, such as email bodies. When calculating a text signature, the data is first normalized by converting line endings into a canonical form (`<CR><LF>`). This mitigates issues caused by platform-specific text encodings, which is particularly important for detached signatures where the message file might be re-encoded between signature creation and verification.
- [**Binary signature**](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#sigtype-binary) (type ID `0x00`): This is the standard signature type for binary data and is typically used for files or data streams. Binary signatures are calculated over the data without any modifications or transformations.
- [**Text signature**](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#name-signature-of-a-canonical-te) (type ID `0x01`): Used for textual data, such as email bodies. When calculating a text signature, the data is first normalized by converting line endings into a canonical form (`<CR><LF>`). This mitigates issues caused by platform-specific text encodings, which is important for detached and cleartext signatures where the message file might be re-encoded between signature creation and verification.
Data signatures are generated by hashing the message content along with the metadata in the signature packet, and calculating a cryptographic signature over that hash. The resulting cryptographic signature is stored in an OpenPGP signature packet.