Reference documentation and code samples for the Grafeas V1 Client class Signature.
Verifiers (e.g. Kritis implementations) MUST verify signatures with respect to the trust anchors defined in policy (e.g. a Kritis policy).
Typically this means that the verifier has been configured with a map from
public_key_id
to public key material (and any required parameters, e.g.
signing algorithm).
In particular, verification implementations MUST NOT treat the signature
public_key_id
as anything more than a key lookup hint. The public_key_id
DOES NOT validate or authenticate a public key; it only provides a mechanism
for quickly selecting a public key ALREADY CONFIGURED on the verifier through
a trusted channel. Verification implementations MUST reject signatures in any
of the following circumstances:
- The
public_key_id
is not recognized by the verifier. - The public key that
public_key_id
refers to does not verify the signature with respect to the payload. Thesignature
contents SHOULD NOT be "attached" (where the payload is included with the serializedsignature
bytes). Verifiers MUST ignore any "attached" payload and only verify signatures with respect to explicitly provided payload (e.g. apayload
field on the proto message that holds this Signature, or the canonical serialization of the proto message that holds this signature).
Generated from protobuf message grafeas.v1.Signature
Namespace
Grafeas \ V1Methods
__construct
Constructor.
Parameters | |
---|---|
Name | Description |
data |
array
Optional. Data for populating the Message object. |
↳ signature |
string
The content of the signature, an opaque bytestring. The payload that this signature verifies MUST be unambiguously provided with the Signature during verification. A wrapper message might provide the payload explicitly. Alternatively, a message might have a canonical serialization that can always be unambiguously computed to derive the payload. |
↳ public_key_id |
string
The identifier for the public key that verifies this signature. * The |
getSignature
The content of the signature, an opaque bytestring.
The payload that this signature verifies MUST be unambiguously provided with the Signature during verification. A wrapper message might provide the payload explicitly. Alternatively, a message might have a canonical serialization that can always be unambiguously computed to derive the payload.
Returns | |
---|---|
Type | Description |
string |
setSignature
The content of the signature, an opaque bytestring.
The payload that this signature verifies MUST be unambiguously provided with the Signature during verification. A wrapper message might provide the payload explicitly. Alternatively, a message might have a canonical serialization that can always be unambiguously computed to derive the payload.
Parameter | |
---|---|
Name | Description |
var |
string
|
Returns | |
---|---|
Type | Description |
$this |
getPublicKeyId
The identifier for the public key that verifies this signature.
- The
public_key_id
is required.- The
public_key_id
SHOULD be an RFC3986 conformant URI. - When possible, the
public_key_id
SHOULD be an immutable reference, such as a cryptographic digest. Examples of validpublic_key_id
s: OpenPGP V4 public key fingerprint: - "openpgp4fpr:74FAF3B861BDA0870C7B6DEF607E48D2A663AEEA" See https://www.iana.org/assignments/uri-schemes/prov/openpgp4fpr for more details on this scheme. RFC6920 digest-named SubjectPublicKeyInfo (digest of the DER serialization):
- "ni:///sha-256;cD9o9Cq6LG3jD0iKXqEi_vdjJGecm_iXkbqVoScViaU"
- "nih:///sha-256;703f68f42aba2c6de30f488a5ea122fef76324679c9bf89791ba95a1271589a5"
- The
Returns | |
---|---|
Type | Description |
string |
setPublicKeyId
The identifier for the public key that verifies this signature.
- The
public_key_id
is required.- The
public_key_id
SHOULD be an RFC3986 conformant URI. - When possible, the
public_key_id
SHOULD be an immutable reference, such as a cryptographic digest. Examples of validpublic_key_id
s: OpenPGP V4 public key fingerprint: - "openpgp4fpr:74FAF3B861BDA0870C7B6DEF607E48D2A663AEEA" See https://www.iana.org/assignments/uri-schemes/prov/openpgp4fpr for more details on this scheme. RFC6920 digest-named SubjectPublicKeyInfo (digest of the DER serialization):
- "ni:///sha-256;cD9o9Cq6LG3jD0iKXqEi_vdjJGecm_iXkbqVoScViaU"
- "nih:///sha-256;703f68f42aba2c6de30f488a5ea122fef76324679c9bf89791ba95a1271589a5"
- The
Parameter | |
---|---|
Name | Description |
var |
string
|
Returns | |
---|---|
Type | Description |
$this |