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Add algorithm registry markdown and KnownSignatureAlgorithm enumeration #194

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merged 18 commits into from
Jan 17, 2024
Merged

Add algorithm registry markdown and KnownSignatureAlgorithm enumeration #194

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7a93838
Add `SupportedAlgorithm` enumeration
tetsuo-cpp Jan 9, 2024
500ce56
Add registry markdown doc
tetsuo-cpp Jan 16, 2024
e52e07e
Regenerate code
tetsuo-cpp Jan 16, 2024
196acba
Switch to P521 with SHA-512
tetsuo-cpp Jan 17, 2024
9b1d4ad
Make it clear that Sigstore services aren't required to adhere to thi…
tetsuo-cpp Jan 17, 2024
58725fe
Rename to `KnownSignatureAlgorithm`
tetsuo-cpp Jan 17, 2024
466fc05
Correct `KnownSignatureAlgorithm` comment
tetsuo-cpp Jan 17, 2024
1243b19
Note that `ed25519-ph` is used for hashedrekord
tetsuo-cpp Jan 17, 2024
c06b5d1
Fix algorithm registry to list SHA-512 with P-521
tetsuo-cpp Jan 17, 2024
3d33e9a
Regenerate code
tetsuo-cpp Jan 17, 2024
3610161
Add hash algorithms to registry also
tetsuo-cpp Jan 17, 2024
d126419
Add RSA signature algorithms to registry
tetsuo-cpp Jan 17, 2024
db90d7f
gen, protos: more HashAlgorithm variants
woodruffw Jan 17, 2024
40ea700
protos: indentation
woodruffw Jan 17, 2024
fe4aafb
algorithm-registry: clarify the purpose of the Hash Algorithms table
woodruffw Jan 17, 2024
10fb943
algorithm-registry: add sha2-512
woodruffw Jan 17, 2024
b46b70c
algorithm-registry: omit sha2-256/192
woodruffw Jan 17, 2024
a6b56fb
switcheroo
woodruffw Jan 17, 2024
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41 changes: 41 additions & 0 deletions docs/algorithm-registry.md
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# Algorithm Registry

This file is designed to act as a source of truth regarding what signing
algorithms are recommended across the Sigstore ecosystem. Any changes to this
file **must** be reflected in the `KnownSignatureAlgorithm` enumeration in
[sigstore_common.proto](../protos/sigstore_common.proto).
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Note that Sigstore clients and services aren't required support all algorithms
in this registry and may support algorithms that aren't in the registry. The
algorithm registry is more of a guideline than a rule and is meant to serve as
a secure set of defaults that the community can follow.

Refer to the [Sigstore: Configurable Crypto Algorithms](https://docs.google.com/document/d/18vTKFvTQdRt3OGz6Qd1xf04o-hugRYSup-1EAOWn7MQ/)
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specification for the design rationale for this registry.

## Signature Algorithms

| Algorithm | Name | Usage |
|-----------|----------------------------|---------------------------------------------------|
| RSA | rsa-sign-pkcs1-2048-sha256 | verify only |
| | rsa-sign-pkcs1-3072-sha256 | sign/verify |
| | rsa-sign-pkcs1-4096-sha256 | sign/verify |
| ECDSA | ecdsa-sha2-256-nistp256 | sign/verify |
| | ecdsa-sha2-384-nistp384 | sign/verify |
| | ecdsa-sha2-512-nistp521 | sign/verify |
| EdDSA | ed25519 | sign/verify |
| | ed25519-ph | sign/verify (recommended only for `hashedrekord`) |

## Hash Algorithms

Generally speaking, these hash algorithms are implied by the above signing suites.
However, clients *may* need to list or configure them explicitly, e.g. for custom
signing schemes or as part of a `hashedrekord` entry.
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| Algorithm | Name |
|-----------|--------------|
| SHA2 | sha2-256 |
| | sha2-384 |
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| | sha2-512 |
| SHA3 | sha3-256 |
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| | sha3-384 |
6 changes: 5 additions & 1 deletion gen/jsonschema/schemas/Bundle.schema.json
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Expand Up @@ -101,7 +101,11 @@
"algorithm": {
"enum": [
"HASH_ALGORITHM_UNSPECIFIED",
"SHA2_256"
"SHA2_256",
"SHA2_256_192",
"SHA2_512",
"SHA3_256",
"SHA3_384"
],
"type": "string",
"title": "This package defines commonly used message types within the Sigstore\n community.",
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6 changes: 5 additions & 1 deletion gen/jsonschema/schemas/HashOutput.schema.json
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Expand Up @@ -7,7 +7,11 @@
"algorithm": {
"enum": [
"HASH_ALGORITHM_UNSPECIFIED",
"SHA2_256"
"SHA2_256",
"SHA2_256_192",
"SHA2_512",
"SHA3_256",
"SHA3_384"
],
"type": "string",
"title": "This package defines commonly used message types within the Sigstore\n community.",
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12 changes: 10 additions & 2 deletions gen/jsonschema/schemas/Input.schema.json
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Original file line number Diff line number Diff line change
Expand Up @@ -147,7 +147,11 @@
"algorithm": {
"enum": [
"HASH_ALGORITHM_UNSPECIFIED",
"SHA2_256"
"SHA2_256",
"SHA2_256_192",
"SHA2_512",
"SHA3_256",
"SHA3_384"
],
"type": "string",
"title": "This package defines commonly used message types within the Sigstore\n community.",
Expand Down Expand Up @@ -543,7 +547,11 @@
"hashAlgorithm": {
"enum": [
"HASH_ALGORITHM_UNSPECIFIED",
"SHA2_256"
"SHA2_256",
"SHA2_256_192",
"SHA2_512",
"SHA3_256",
"SHA3_384"
],
"type": "string",
"title": "This package defines commonly used message types within the Sigstore\n community.",
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6 changes: 5 additions & 1 deletion gen/jsonschema/schemas/MessageSignature.schema.json
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Expand Up @@ -26,7 +26,11 @@
"algorithm": {
"enum": [
"HASH_ALGORITHM_UNSPECIFIED",
"SHA2_256"
"SHA2_256",
"SHA2_256_192",
"SHA2_512",
"SHA3_256",
"SHA3_384"
],
"type": "string",
"title": "This package defines commonly used message types within the Sigstore\n community.",
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6 changes: 5 additions & 1 deletion gen/jsonschema/schemas/TransparencyLogInstance.schema.json
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Expand Up @@ -11,7 +11,11 @@
"hashAlgorithm": {
"enum": [
"HASH_ALGORITHM_UNSPECIFIED",
"SHA2_256"
"SHA2_256",
"SHA2_256_192",
"SHA2_512",
"SHA3_256",
"SHA3_384"
],
"type": "string",
"title": "This package defines commonly used message types within the Sigstore\n community.",
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6 changes: 5 additions & 1 deletion gen/jsonschema/schemas/TrustedRoot.schema.json
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Original file line number Diff line number Diff line change
Expand Up @@ -206,7 +206,11 @@
"hashAlgorithm": {
"enum": [
"HASH_ALGORITHM_UNSPECIFIED",
"SHA2_256"
"SHA2_256",
"SHA2_256_192",
"SHA2_512",
"SHA3_256",
"SHA3_384"
],
"type": "string",
"title": "This package defines commonly used message types within the Sigstore\n community.",
Expand Down
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