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Differentiate inline-signed messages between one-pass-signed and prefix-signed messages

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Paul Schaub 2023-12-14 12:35:23 +01:00
parent 6d63342455
commit 01e18a835b
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
2 changed files with 14 additions and 2 deletions
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7
book/source/glossary.md
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@ -313,7 +313,10 @@ Notation Tag
Part of a {term}`Notation` name.
One-pass Signature Packet
One or more {term}`packets<OpenPGP Signature Packet>` before the actual data in a {term}`Data Signature` which contain information to allow a receiving {term}`implementation<OpenPGP Implementation>` to create {term}`hashes<Hash Digest>` required for signature verification. See [RFC 5.4](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#one-pass-sig) for more details.
One or more {term}`packets<Packet>` before the actual data in a {term}`Data Signature` which contain information to allow a receiving {term}`implementation<OpenPGP Implementation>` to create {term}`hashes<Hash Digest>` required for signature verification. See [RFC 5.4](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#one-pass-sig) for more details.
One-pass-signed Message
A {term}`OpenPGP Message` signed using one or more {term}`One-pass signatures<One-pass Signature Packet>`.
OpenPGP Certificate
An OpenPGP certificate contains public key material, identity claims and third party certifications (but no private key material)
@ -405,6 +408,8 @@ Preferred AEAD Ciphersuites Subpacket
See [RFC 5.2.3.15](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#name-preferred-aead-ciphersuites)
Prefixed-Signed Message
An {term}`OpenPGP Message` with one or more prefixed {term}`signature packets<OpenPGP Signature Packet>`.
Primary Component Key
See {term}`OpenPGP Primary Key`.

9
book/source/signing_data.md
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@ -54,7 +54,12 @@ This method is commonly used for signing or encrypting emails. Most email softwa
#### Structure
An {term}`inline-signed<Inline Signature>` {term}`OpenPGP message` consists of three segments:
There are two different constructions available to generate inline-signed messages:
* {term}`One-pass-signed messages<One-pass-signed Message>` are signed using one ore more {term}`one-pass signatures<One-pass Signature Packet>`
* {term}`Prefixed-signed messages<Prefixed-signed Message>` have the actual signature(s) prefixed to the {term}`OpenPGP message<OpenPGP Message>`.
A {term}`one-pass-signed<One-pass-signed Message>` {term}`OpenPGP message` consists of three segments:
1. [**One-pass signature packets**](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#one-pass-sig): These one or more {term}`packets<Packet>` precede the signed data and enable {term}`signature<OpenPGP Signature Packet>` computation in one pass.
@ -62,6 +67,8 @@ An {term}`inline-signed<Inline Signature>` {term}`OpenPGP message` consists of t
3. **{term}`Data signature packets<OpenPGP Signature Packet>`**: These contain the {term}`cryptographic signature` corresponding to the original data.
Less commonly used are {term}`prefixed-signed messages<Prefixed-signed Message>`, where the {term}`signature packet(s)<signature packet>` are simply prepended to the message.
#### Creation
To produce an {term}`inline signature`, the {term}`signer` processes the entirety of the data by reading from an input file and writing into an output {term}`OpenPGP message` file. As the data is processed, the {term}`signer` simultaneously calculates a {term}`cryptographic signature`. This procedure results in the appending of a {term}`data signature packet` to the output {term}`OpenPGP message` file, where it can be efficiently stored.