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feat: adds load_settings and load_settings_file functions
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Includes a sample loading a trust list.
gpeacock committed Dec 3, 2024
1 parent a53d19e commit 91d2334
Showing 7 changed files with 293 additions and 7 deletions.
3 changes: 2 additions & 1 deletion build.rs
Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
// Purpose: Generate the scaffolding for the uniffi library.
fn main() {
uniffi::generate_scaffolding("./src/c2pa.udl").unwrap();
let _result = uniffi::generate_scaffolding("./src/c2pa.udl");
}
35 changes: 31 additions & 4 deletions c2pa/__init__.py
Original file line number Diff line number Diff line change
@@ -11,8 +11,35 @@
# specific language governing permissions and limitations under
# each license.

from .c2pa_api import Reader, Builder, create_signer, create_remote_signer, sign_ps256
from .c2pa import Error, SigningAlg, CallbackSigner, sdk_version, version
from .c2pa.c2pa import _UniffiConverterTypeSigningAlg, _UniffiConverterTypeReader, _UniffiRustBuffer
from .c2pa_api import (
Reader,
Builder,
create_signer,
create_remote_signer,
sign_ps256,
load_settings_file,
)
from .c2pa import Error, SigningAlg, CallbackSigner, sdk_version, version, load_settings
from .c2pa.c2pa import (
_UniffiConverterTypeSigningAlg,
_UniffiConverterTypeReader,
_UniffiRustBuffer,
)

__all__ = ['Reader', 'Builder', 'CallbackSigner', 'create_signer', 'sign_ps256', 'Error', 'SigningAlg', 'sdk_version', 'version', 'create_remote_signer', '_UniffiConverterTypeSigningAlg', '_UniffiRustBuffer', '_UniffiConverterTypeReader']
__all__ = [
"Reader",
"Builder",
"CallbackSigner",
"create_signer",
"sign_ps256",
"Error",
"SigningAlg",
"sdk_version",
"version",
"load_settings",
"load_settings_file",
"create_remote_signer",
"_UniffiConverterTypeSigningAlg",
"_UniffiRustBuffer",
"_UniffiConverterTypeReader",
]
8 changes: 8 additions & 0 deletions c2pa/c2pa_api/c2pa_api.py
Original file line number Diff line number Diff line change
@@ -255,3 +255,11 @@ def sign_ps256(data: bytes, key: bytes) -> bytes:
hashes.SHA256()
)
return signature

def load_settings_file(path: str, format=None):
with open(path, "r") as file:
if format is None:
# determine the format from the file extension
format = os.path.splitext(path)[1][1:]
settings = file.read()
api.load_settings(settings, format)
2 changes: 2 additions & 0 deletions src/c2pa.udl
Original file line number Diff line number Diff line change
@@ -2,6 +2,8 @@
namespace c2pa {
string version();
string sdk_version();
[Throws=Error]
void load_settings([ByRef] string format, [ByRef] string settings);
};

[Error]
15 changes: 14 additions & 1 deletion src/lib.rs
Original file line number Diff line number Diff line change
@@ -14,7 +14,7 @@
use std::env;
use std::sync::RwLock;

pub use c2pa::{Signer, SigningAlg};
pub use c2pa::{Signer, SigningAlg, settings::load_settings_from_str};

/// these all need to be public so that the uniffi macro can see them
mod error;
@@ -45,6 +45,11 @@ pub fn sdk_version() -> String {
)
}

pub fn load_settings(settings: &str, format: &str) -> Result<()> {
load_settings_from_str(settings, format)?;
Ok(())
}

pub struct Reader {
reader: RwLock<c2pa::Reader>,
}
@@ -102,6 +107,14 @@ impl Reader {
}
}

// pub fn validation_state(&self) -> Result<ValidationState> {
// if let Ok(st) = self.reader.validation_state() {
// Ok(st.validation_state())
// } else {
// Err(Error::RwLock)
// }
// }

pub fn resource_to_stream(&self, uri: &str, stream: &dyn Stream) -> Result<u64> {
if let Ok(reader) = self.reader.try_read() {
let mut stream = StreamAdapter::from(stream);
229 changes: 229 additions & 0 deletions tests/fixtures/settings.toml
Original file line number Diff line number Diff line change
@@ -0,0 +1,229 @@
# This sample c2pa settings file enables a trust list.
# In practice you should update the trust anchors from a remote source as needed.
# Many other settings are available, see the c2pa documentation for more information.
[verify]
trusted = true

[trust]
trust_config = """
//id-kp-emailProtection
1.3.6.1.5.5.7.3.4
//id-kp-documentSigning
1.3.6.1.5.5.7.3.36
//id-kp-timeStamping
1.3.6.1.5.5.7.3.8
//id-kp-OCSPSigning
1.3.6.1.5.5.7.3.9
// MS C2PA Signing
1.3.6.1.4.1.311.76.59.1.9
"""
trust_anchors = """
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dfVLPyqKmtjenOUMvVQD7waNbetLY7kvUJZCd5eaDghk30/Q1RaNjiP/2RfA/it8
zGxQnM2hCA==
-----END CERTIFICATE-----
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"""
8 changes: 7 additions & 1 deletion tests/test_unit_tests.py
Original file line number Diff line number Diff line change
@@ -17,7 +17,7 @@
import unittest
from unittest.mock import mock_open, patch

from c2pa import Builder, Error, Reader, SigningAlg, create_signer, sdk_version, sign_ps256
from c2pa import Builder, Error, Reader, SigningAlg, create_signer, sdk_version, sign_ps256, load_settings_file

PROJECT_PATH = os.getcwd()

@@ -51,6 +51,12 @@ def test_reader_bad_format(self):
with open(testPath, "rb") as file:
reader = Reader("badFormat", file)

def test_settings_trust(self):
load_settings_file("tests/fixtures/settings.toml")
with open(testPath, "rb") as file:
reader = Reader("image/jpeg",file)
json = reader.json()
self.assertIn("C.jpg", json)

class TestBuilder(unittest.TestCase):
# Define a manifest as a dictionary

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