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Add diagram for prefixed-signed message

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This commit is contained in:
Paul Schaub 2023-12-19 18:54:05 +01:00
parent 70b6bd2f43
commit edc2c8322d
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
3 changed files with 74 additions and 1 deletions
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63
book/assets/drawio/prefixed-signed-message.drawio Normal file
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@ -0,0 +1,63 @@
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9
book/source/signing_data.md
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@ -76,7 +76,7 @@ A {term}`one-pass signed<One-pass signed Message>` {term}`OpenPGP message` consi
```{figure} plain_svg/ops-signed-message.svg ```{figure} plain_svg/ops-signed-message.svg
:name: fig-ops-signed-message :name: fig-ops-signed-message
:alt: Depicts the structure of a one-pass-signed message. :alt: Depicts the structure of a one-pass-signed message. Two one-pass-signatures lead the literal data packet, followed by two signature packets. Arrows show, how the hash-algorithm field of the one-pass-signatures is inspected in order to initiate the hashing procedure.
The structure of a one-pass signed message. The structure of a one-pass signed message.
``` ```
@ -126,6 +126,13 @@ In this format, the signature packets are stored ahead of the message itself:
2. [**Literal data packet**](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#lit): This contains the original data (e.g., the body of a message), without additional interpretation or conversion. 2. [**Literal data packet**](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#lit): This contains the original data (e.g., the body of a message), without additional interpretation or conversion.
```{figure} plain_svg/prefixed-signed-message.svg
:name: fig-prefixed-signed-message
:alt: Depicts the structure of a prefixed-signed message. As an example, two signature packets lead a literal data packet. Arrows show, how the signatures hash algorithm field is inspected to start the hashing procedure.
Structure of a prefixed-signed message.
```
Compared to a {term}`one-pass signed message`, there are no {term}`one-pass signature packets<One-pass Signature Packet>` in this format, and the (otherwise equivalent) {term}`signature packet(s)<signature packet>` are stored ahead of the signed data. Compared to a {term}`one-pass signed message`, there are no {term}`one-pass signature packets<One-pass Signature Packet>` in this format, and the (otherwise equivalent) {term}`signature packet(s)<signature packet>` are stored ahead of the signed data.
For verification, this is equally convenient as the one-pass signed message form. For verification, this is equally convenient as the one-pass signed message form.