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Uses unit as part of validity string
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@saltiyazan
saltiyazan committed Sep 14, 2024
1 parent 4f7e86f commit 2891163
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Showing 6 changed files with 144 additions and 79 deletions.
65 changes: 49 additions & 16 deletions charmcraft.yaml
View file
Original file line number Diff line number Diff line change
Expand Up @@ -76,37 +76,70 @@ config:
ca-common-name:
type: string
default: self-signed-certificates-operator
description: Common name to be used by the Certificate Authority. Changing this value will trigger generation of a new CA certificate, revoking all previously issued certificates.
description: >
Common name to be used by the Certificate Authority.
Changing this value will trigger generation of a new CA certificate,
revoking all previously issued certificates.
ca-organization:
type: string
description: Organization name to be used by the Certificate Authority. Changing this value will trigger generation of a new CA certificate, revoking all previously issued certificates.
description: >
Organization name to be used by the Certificate Authority.
Changing this value will trigger generation of a new CA certificate,
revoking all previously issued certificates.
ca-organizational-unit:
type: string
description: Organizational unit to be used by the Certificate Authority. Changing this value will trigger generation of a new CA certificate, revoking all previously issued certificates.
description: >
Organizational unit to be used by the Certificate Authority.
Changing this value will trigger generation of a new CA certificate,
revoking all previously issued certificates.
ca-email-address:
type: string
description: Email address to be used by the Certificate Authority. Changing this value will trigger generation of a new CA certificate, revoking all previously issued certificates.
description: >
Email address to be used by the Certificate Authority.
Changing this value will trigger generation of a new CA certificate,
revoking all previously issued certificates.
ca-country-name:
type: string
description: Country name to be used by the Certificate Authority. Changing this value will trigger generation of a new CA certificate, revoking all previously issued certificates.
description: >
Country name to be used by the Certificate Authority.
Changing this value will trigger generation of a new CA certificate,
revoking all previously issued certificates.
ca-state-or-province-name:
type: string
description: State or province name to be used by the Certificate Authority. Changing this value will trigger generation of a new CA certificate, revoking all previously issued certificates.
description: >
State or province name to be used by the Certificate Authority.
Changing this value will trigger generation of a new CA certificate,
revoking all previously issued certificates.
ca-locality-name:
type: string
description: Locality name to be used by the Certificate Authority. Changing this value will trigger generation of a new CA certificate, revoking all previously issued certificates.
description: >
Locality name to be used by the Certificate Authority.
Changing this value will trigger generation of a new CA certificate,
revoking all previously issued certificates.
root-ca-validity:
type: int
default: 365
description: RootCA certificate validity (in days). This value should be longer than twice the certificate-validity. Changing this value will trigger generation of a new CA certificate, revoking all previously issued certificates.
type: string
default: 365d
description: >
RootCA certificate validity.
The given value must be followed by one of: "s" for seconds, "h" for hours, "d" for days and "y" for years.
For example, "15s" for 15 seconds, "10y" for 10 years.
If no units are given, the unit will be assumed as days.
Defaults to 365 days.
This value should be longer than twice the certificate-validity.
Changing this value will trigger generation of a new CA certificate,
revoking all previously issued certificates.
certificate-validity:
type: int
default: 90
description: Certificate validity (in days). This value must be shorter than half the root-ca-validity. Changing this value will trigger generation of a new CA certificate, revoking all previously issued certificates.
validity-unit:
type: string
default: days
description: Validity unit weeks, days, hours, minutes or seconds, it is days by default and will be applied to both root-ca-validity and certificate-validity. Changing this value will trigger generation of a new CA certificate, revoking all previously issued certificates.
default: 90d
description: >
Signed certificate validity.
The given value must be followed by one of: "s" for seconds, "h" for hours, "d" for days and "y" for years.
For example, "15s" for 15 seconds, "10y" for 10 years.
If no units are given, the unit will be assumed as days.
Defaults to 365 days.
This value should be longer than twice the certificate-validity.
Changing this value will trigger generation of a new CA certificate,
revoking all previously issued certificates.
actions:
get-ca-certificate:
Expand Down
106 changes: 70 additions & 36 deletions src/charm.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -100,24 +100,39 @@ def _is_ca_cert_active(self) -> bool:
return secret_info.expires > datetime.now(secret_info.expires.tzinfo)

@property
def _config_root_ca_certificate_validity(self) -> timedelta:
"""Return Root CA certificate validity (timedelta)."""
return self._int_config_to_timedelta(
int(self.model.config.get("root-ca-validity")), # type: ignore[arg-type]
self._config_validity_unit,
)
def _config_root_ca_certificate_validity(self) -> timedelta | None:
"""Return Root CA certificate validity.
Returns:
int: Certificate validity
"""
try:
validity = self._parse_config_time_string(
str(self.model.config.get("root-ca-validity", ""))
)
except ValueError:
logger.warning('config option "certificate-validity" is invalid.', exc_info=True)
return None
return validity

@property
def _config_validity_unit(self) -> str:
"""Return Validity unit.
def _config_certificate_validity(self) -> timedelta | None:
"""Returns certificate validity (in seconds).
Returns:
str: Validity unit.
int: Certificate validity (in seconds)
"""
return str(self.model.config.get("validity-unit", "days"))
try:
validity = self._parse_config_time_string(
str(self.model.config.get("certificate-validity", ""))
)
except ValueError:
logger.warning('config option "certificate-validity" is invalid.', exc_info=True)
return None
return validity

@property
def _ca_certificate_renewal_threshold(self) -> timedelta:
def _ca_certificate_renewal_threshold(self) -> timedelta | None:
"""Return CA certificate renewal threshold.
Which is the time difference between the validity of the root certificate
Expand All @@ -127,6 +142,9 @@ def _ca_certificate_renewal_threshold(self) -> timedelta:
the renewal threshold will be 275 days.
This is important so the CA does not expire during the issued certificate validity.
"""
if not self._config_root_ca_certificate_validity or not self._config_certificate_validity:
logger.warning("No root CA certificate validity or certificate validity set")
return None
return self._config_root_ca_certificate_validity - self._config_certificate_validity

def _on_get_issued_certificates(self, event: ActionEvent) -> None:
Expand Down Expand Up @@ -167,36 +185,30 @@ def _on_rotate_private_key(self, event: ActionEvent):
return
event.set_results({"result": "New private key and CA certificate generated and stored."})

@property
def _config_certificate_validity(self) -> timedelta:
"""Returns certificate validity (timedelta)."""
return self._int_config_to_timedelta(
int(self.model.config.get("certificate-validity")), # type: ignore[arg-type]
self._config_validity_unit,
)
def _parse_config_time_string(self, time_str: str) -> timedelta:
"""Parse a given time string.
def _int_config_to_timedelta(self, value: int, unit: str) -> timedelta:
"""Convert the config value to a timedelta.
It must be a number followed by either an
s for seconds, h for hours, d for days or y for years.
Args:
value (int): Config value.
unit (str): Config unit.
time_str: the input string. Ex: "15s", "365d", "10w"
or "10" and will be converted to days
Returns:
timedelta: Timedelta.
timedelta object representing the given string
"""
if unit == "weeks":
return timedelta(weeks=value)
elif unit == "days":
return timedelta(days=value)
elif unit == "hours":
return timedelta(hours=value)
elif unit == "minutes":
return timedelta(minutes=value)
elif unit == "seconds":
if time_str.isnumeric():
return timedelta(days=int(time_str))
value, unit = int(time_str[:-1]), time_str[-1]
if unit == "s":
return timedelta(seconds=value)
else:
elif unit == "h":
return timedelta(hours=value)
elif unit == "d":
return timedelta(days=value)
elif unit == "w":
return timedelta(weeks=value)
raise ValueError(f"unsupported time string format: {time_str}")

@property
def _config_ca_common_name(self) -> Optional[str]:
Expand Down Expand Up @@ -246,8 +258,14 @@ def _generate_root_certificate(self) -> None:
If the secret is already created, we simply update its content, else we create a
new secret.
"""
if not self._config_ca_common_name:
raise ValueError("CA common name should not be empty")
if (
not self._config_ca_common_name
or not self._config_root_ca_certificate_validity
or not self._config_certificate_validity
or not self._ca_certificate_renewal_threshold
):
logger.warning("Missing configuration for root CA certificate")
return
private_key = generate_private_key()
ca_certificate = generate_ca(
private_key=private_key,
Expand Down Expand Up @@ -315,6 +333,14 @@ def _move_active_ca_cert_to_expiring(self):
The validity of the expiring CA can't be shorter than
the validity of the issued certificates.
"""
if (
not self._config_ca_common_name
or not self._config_root_ca_certificate_validity
or not self._config_certificate_validity
or not self._ca_certificate_renewal_threshold
):
logger.warning("Missing configuration for expiring CA certificate")
return
try:
current_active_ca_cert_secret = self.model.get_secret(
label=CA_CERTIFICATES_SECRET_LABEL
Expand Down Expand Up @@ -419,6 +445,14 @@ def _generate_self_signed_certificate(
is_ca (bool): Whether the certificate is a CA
relation_id (int): Relation id
"""
if (
not self._config_ca_common_name
or not self._config_root_ca_certificate_validity
or not self._config_certificate_validity
or not self._ca_certificate_renewal_threshold
):
logger.warning("Missing configuration for self-signed certificate")
return
ca_certificate_secret = self.model.get_secret(label=CA_CERTIFICATES_SECRET_LABEL)
ca_certificate_secret_content = ca_certificate_secret.get_content(refresh=True)
ca_certificate = Certificate.from_string(ca_certificate_secret_content["ca-certificate"])
Expand Down
9 changes: 4 additions & 5 deletions tests/integration/test_integration.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -60,8 +60,8 @@ async def deploy(ops_test: OpsTest, request):
trust=True,
config={
"ca-common-name": CA_COMMON_NAME,
"root-ca-validity": 200,
"certificate-validity": 100,
"root-ca-validity": "200",
"certificate-validity": "100",
"ca-email-address": "[email protected]",
"ca-country-name": "US",
"ca-state-or-province-name": "California",
Expand Down Expand Up @@ -136,9 +136,8 @@ async def test_given_tls_requirer_is_integrated_when_certificate_expires_then_ne
assert application
await application.set_config(
{
"root-ca-validity": 60,
"certificate-validity": 30,
"validity-unit": "seconds",
"root-ca-validity": "600s",
"certificate-validity": "30s",
}
)
await ops_test.model.wait_for_idle(
Expand Down
10 changes: 5 additions & 5 deletions tests/unit/test_charm_collect_status.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ def test_given_invalid_config_when_collect_unit_status_then_status_is_blocked(se
state_in = scenario.State(
config={
"ca-common-name": "",
"certificate-validity": 100,
"certificate-validity": "100",
},
leader=True,
)
Expand All @@ -36,7 +36,7 @@ def test_given_invalid_validity_config_when_collect_unit_status_then_status_is_b
state_in = scenario.State(
config={
"ca-common-name": "pizza.example.com",
"certificate-validity": 0,
"certificate-validity": "0",
},
leader=True,
)
Expand All @@ -53,8 +53,8 @@ def test_given_root_ca_validity_config_not_twice_the_certificate_validity_when_c
state_in = scenario.State(
config={
"ca-common-name": "pizza.example.com",
"certificate-validity": 100,
"root-ca-validity": 0,
"certificate-validity": "100",
"root-ca-validity": "0",
},
leader=True,
)
Expand All @@ -77,7 +77,7 @@ def test_given_valid_config_when_collect_unit_status_then_status_is_active(
state_in = scenario.State(
config={
"ca-common-name": "pizza.example.com",
"certificate-validity": 100,
"certificate-validity": "100",
},
leader=True,
)
Expand Down
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