Diced: Add service diced an implementation of android.security.dice
Bug: 198197213
Test: diced_test
Change-Id: I7075c2e7ac8e48a13f4eb177f2e989ff1e6695a2
diff --git a/diced/src/sample_inputs.rs b/diced/src/sample_inputs.rs
new file mode 100644
index 0000000..f76ebc9
--- /dev/null
+++ b/diced/src/sample_inputs.rs
@@ -0,0 +1,255 @@
+// Copyright 2021, The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! This module provides a set of sample input values for a DICE chain, a sample UDS,
+//! as well as tuple of CDIs and BCC derived thereof.
+
+use android_hardware_security_dice::aidl::android::hardware::security::dice::{
+ Config::Config as BinderConfig, InputValues::InputValues as BinderInputValues, Mode::Mode,
+};
+use anyhow::{Context, Result};
+use dice::ContextImpl;
+use diced_open_dice_cbor as dice;
+use diced_utils::cbor;
+use diced_utils::InputValues;
+use keystore2_crypto::ZVec;
+use std::convert::{TryFrom, TryInto};
+use std::io::Write;
+
+/// Sample UDS used to perform the root dice flow by `make_sample_bcc_and_cdis`.
+pub static UDS: &[u8; dice::CDI_SIZE] = &[
+ 0x65, 0x4f, 0xab, 0xa9, 0xa5, 0xad, 0x0f, 0x5e, 0x15, 0xc3, 0x12, 0xf7, 0x77, 0x45, 0xfa, 0x55,
+ 0x18, 0x6a, 0xa6, 0x34, 0xb6, 0x7c, 0x82, 0x7b, 0x89, 0x4c, 0xc5, 0x52, 0xd3, 0x27, 0x35, 0x8e,
+];
+
+fn encode_pub_key_ed25519(pub_key: &[u8], stream: &mut dyn Write) -> Result<()> {
+ cbor::encode_header(5 /* CBOR MAP */, 5, stream)
+ .context("In encode_pub_key_ed25519: Trying to encode map header.")?;
+ cbor::encode_number(1, stream)
+ .context("In encode_pub_key_ed25519: Trying to encode Key type tag.")?;
+ cbor::encode_number(1, stream)
+ .context("In encode_pub_key_ed25519: Trying to encode Key type.")?;
+ cbor::encode_number(3, stream)
+ .context("In encode_pub_key_ed25519: Trying to encode algorithm tag.")?;
+ // Encoding a -8 for AlgorithmEdDSA. The encoded number is -1 - <header argument>,
+ // the an argument of 7 below.
+ cbor::encode_header(1 /* CBOR NEGATIVE INT */, 7 /* -1 -7 = -8*/, stream)
+ .context("In encode_pub_key_ed25519: Trying to encode algorithm.")?;
+ cbor::encode_number(4, stream)
+ .context("In encode_pub_key_ed25519: Trying to encode ops tag.")?;
+ // Ops 2 for verify.
+ cbor::encode_number(2, stream).context("In encode_pub_key_ed25519: Trying to encode ops.")?;
+ cbor::encode_header(1 /* CBOR NEGATIVE INT */, 0 /* -1 -0 = -1*/, stream)
+ .context("In encode_pub_key_ed25519: Trying to encode curve tag.")?;
+ // Curve 6 for Ed25519
+ cbor::encode_number(6, stream).context("In encode_pub_key_ed25519: Trying to encode curve.")?;
+ cbor::encode_header(1 /* CBOR NEGATIVE INT */, 1 /* -1 -1 = -2*/, stream)
+ .context("In encode_pub_key_ed25519: Trying to encode X coordinate tag.")?;
+ cbor::encode_bstr(pub_key, stream)
+ .context("In encode_pub_key_ed25519: Trying to encode X coordinate.")?;
+ Ok(())
+}
+
+/// Derives a tuple of (CDI_ATTEST, CDI_SEAL, BCC) derived of the vector of input values returned
+/// by `get_input_values_vector`.
+pub fn make_sample_bcc_and_cdis() -> Result<(ZVec, ZVec, Vec<u8>)> {
+ let mut dice_ctx = dice::OpenDiceCborContext::new();
+ let private_key_seed = dice_ctx
+ .derive_cdi_private_key_seed(UDS)
+ .context("In make_sample_bcc_and_cdis: Trying to derive private key seed.")?;
+
+ let (public_key, _) =
+ dice_ctx
+ .keypair_from_seed(&private_key_seed[..].try_into().context(
+ "In make_sample_bcc_and_cids: Failed to convert seed to array reference.",
+ )?)
+ .context("In make_sample_bcc_and_cids: Failed to generate key pair.")?;
+
+ let input_values_vector = get_input_values_vector();
+
+ let (cdi_attest, cdi_seal, mut cert) = dice_ctx
+ .main_flow(
+ UDS,
+ UDS,
+ &InputValues::try_from(&input_values_vector[0])
+ .context("In make_sample_bcc_and_cdis: Trying to convert input values. (0)")?,
+ )
+ .context("In make_sample_bcc_and_cdis: Trying to run first main flow.")?;
+
+ let mut bcc: Vec<u8> = vec![];
+
+ cbor::encode_header(4 /* CBOR ARRAY */, 2, &mut bcc)
+ .context("In make_sample_bcc_and_cdis: Trying to encode array header.")?;
+ encode_pub_key_ed25519(&public_key, &mut bcc)
+ .context("In make_sample_bcc_and_cdis: Trying encode pub_key.")?;
+
+ bcc.append(&mut cert);
+
+ let (cdi_attest, cdi_seal, bcc) = dice_ctx
+ .bcc_main_flow(
+ &cdi_attest[..].try_into().context(
+ "In make_sample_bcc_and_cdis: Failed to convert cdi_attest to array reference. (1)",
+ )?,
+ &cdi_seal[..].try_into().context(
+ "In make_sample_bcc_and_cdis: Failed to convert cdi_seal to array reference. (1)",
+ )?,
+ &bcc,
+ &InputValues::try_from(&input_values_vector[1])
+ .context("In make_sample_bcc_and_cdis: Trying to convert input values. (1)")?,
+ )
+ .context("In make_sample_bcc_and_cdis: Trying to run first bcc main flow.")?;
+ dice_ctx
+ .bcc_main_flow(
+ &cdi_attest[..].try_into().context(
+ "In make_sample_bcc_and_cdis: Failed to convert cdi_attest to array reference. (2)",
+ )?,
+ &cdi_seal[..].try_into().context(
+ "In make_sample_bcc_and_cdis: Failed to convert cdi_seal to array reference. (2)",
+ )?,
+ &bcc,
+ &InputValues::try_from(&input_values_vector[2])
+ .context("In make_sample_bcc_and_cdis: Trying to convert input values. (2)")?,
+ )
+ .context("In make_sample_bcc_and_cdis: Trying to run second bcc main flow.")
+}
+
+fn make_input_values(
+ code_hash: &[u8; dice::HASH_SIZE],
+ authority_hash: &[u8; dice::HASH_SIZE],
+ config_name: &str,
+ config_version: u64,
+ config_resettable: bool,
+ mode: Mode,
+ hidden: &[u8; dice::HIDDEN_SIZE],
+) -> Result<BinderInputValues> {
+ Ok(BinderInputValues {
+ codeHash: code_hash.to_vec(),
+ config: BinderConfig {
+ desc: dice::bcc::format_config_descriptor(
+ Some(config_name),
+ Some(config_version),
+ config_resettable,
+ )
+ .context("In make_input_values: Failed to format config descriptor.")?,
+ },
+ authorityHash: authority_hash.to_vec(),
+ authorityDescriptor: None,
+ hidden: hidden.to_vec(),
+ mode,
+ })
+}
+
+/// Returns a set of sample input for a dice chain comprising the android boot loader ABL,
+/// the verified boot information AVB, and Android S.
+pub fn get_input_values_vector() -> Vec<BinderInputValues> {
+ vec![
+ make_input_values(
+ &[
+ // code hash
+ 0x16, 0x48, 0xf2, 0x55, 0x53, 0x23, 0xdd, 0x15, 0x2e, 0x83, 0x38, 0xc3, 0x64, 0x38,
+ 0x63, 0x26, 0x0f, 0xcf, 0x5b, 0xd1, 0x3a, 0xd3, 0x40, 0x3e, 0x23, 0xf8, 0x34, 0x4c,
+ 0x6d, 0xa2, 0xbe, 0x25, 0x1c, 0xb0, 0x29, 0xe8, 0xc3, 0xfb, 0xb8, 0x80, 0xdc, 0xb1,
+ 0xd2, 0xb3, 0x91, 0x4d, 0xd3, 0xfb, 0x01, 0x0f, 0xe4, 0xe9, 0x46, 0xa2, 0xc0, 0x26,
+ 0x57, 0x5a, 0xba, 0x30, 0xf7, 0x15, 0x98, 0x14,
+ ],
+ &[
+ // authority hash
+ 0xf9, 0x00, 0x9d, 0xc2, 0x59, 0x09, 0xe0, 0xb6, 0x98, 0xbd, 0xe3, 0x97, 0x4a, 0xcb,
+ 0x3c, 0xe7, 0x6b, 0x24, 0xc3, 0xe4, 0x98, 0xdd, 0xa9, 0x6a, 0x41, 0x59, 0x15, 0xb1,
+ 0x23, 0xe6, 0xc8, 0xdf, 0xfb, 0x52, 0xb4, 0x52, 0xc1, 0xb9, 0x61, 0xdd, 0xbc, 0x5b,
+ 0x37, 0x0e, 0x12, 0x12, 0xb2, 0xfd, 0xc1, 0x09, 0xb0, 0xcf, 0x33, 0x81, 0x4c, 0xc6,
+ 0x29, 0x1b, 0x99, 0xea, 0xae, 0xfd, 0xaa, 0x0d,
+ ],
+ "ABL", // config name
+ 1, // config version
+ true, // resettable
+ Mode::NORMAL,
+ &[
+ // hidden
+ 0xa2, 0x01, 0xd0, 0xc0, 0xaa, 0x75, 0x3c, 0x06, 0x43, 0x98, 0x6c, 0xc3, 0x5a, 0xb5,
+ 0x5f, 0x1f, 0x0f, 0x92, 0x44, 0x3b, 0x0e, 0xd4, 0x29, 0x75, 0xe3, 0xdb, 0x36, 0xda,
+ 0xc8, 0x07, 0x97, 0x4d, 0xff, 0xbc, 0x6a, 0xa4, 0x8a, 0xef, 0xc4, 0x7f, 0xf8, 0x61,
+ 0x7d, 0x51, 0x4d, 0x2f, 0xdf, 0x7e, 0x8c, 0x3d, 0xa3, 0xfc, 0x63, 0xd4, 0xd4, 0x74,
+ 0x8a, 0xc4, 0x14, 0x45, 0x83, 0x6b, 0x12, 0x7e,
+ ],
+ )
+ .unwrap(),
+ make_input_values(
+ &[
+ // code hash
+ 0xa4, 0x0c, 0xcb, 0xc1, 0xbf, 0xfa, 0xcc, 0xfd, 0xeb, 0xf4, 0xfc, 0x43, 0x83, 0x7f,
+ 0x46, 0x8d, 0xd8, 0xd8, 0x14, 0xc1, 0x96, 0x14, 0x1f, 0x6e, 0xb3, 0xa0, 0xd9, 0x56,
+ 0xb3, 0xbf, 0x2f, 0xfa, 0x88, 0x70, 0x11, 0x07, 0x39, 0xa4, 0xd2, 0xa9, 0x6b, 0x18,
+ 0x28, 0xe8, 0x29, 0x20, 0x49, 0x0f, 0xbb, 0x8d, 0x08, 0x8c, 0xc6, 0x54, 0xe9, 0x71,
+ 0xd2, 0x7e, 0xa4, 0xfe, 0x58, 0x7f, 0xd3, 0xc7,
+ ],
+ &[
+ // authority hash
+ 0xb2, 0x69, 0x05, 0x48, 0x56, 0xb5, 0xfa, 0x55, 0x6f, 0xac, 0x56, 0xd9, 0x02, 0x35,
+ 0x2b, 0xaa, 0x4c, 0xba, 0x28, 0xdd, 0x82, 0x3a, 0x86, 0xf5, 0xd4, 0xc2, 0xf1, 0xf9,
+ 0x35, 0x7d, 0xe4, 0x43, 0x13, 0xbf, 0xfe, 0xd3, 0x36, 0xd8, 0x1c, 0x12, 0x78, 0x5c,
+ 0x9c, 0x3e, 0xf6, 0x66, 0xef, 0xab, 0x3d, 0x0f, 0x89, 0xa4, 0x6f, 0xc9, 0x72, 0xee,
+ 0x73, 0x43, 0x02, 0x8a, 0xef, 0xbc, 0x05, 0x98,
+ ],
+ "AVB", // config name
+ 1, // config version
+ true, // resettable
+ Mode::NORMAL,
+ &[
+ // hidden
+ 0x5b, 0x3f, 0xc9, 0x6b, 0xe3, 0x95, 0x59, 0x40, 0x5e, 0x64, 0xe5, 0x64, 0x3f, 0xfd,
+ 0x21, 0x09, 0x9d, 0xf3, 0xcd, 0xc7, 0xa4, 0x2a, 0xe2, 0x97, 0xdd, 0xe2, 0x4f, 0xb0,
+ 0x7d, 0x7e, 0xf5, 0x8e, 0xd6, 0x4d, 0x84, 0x25, 0x54, 0x41, 0x3f, 0x8f, 0x78, 0x64,
+ 0x1a, 0x51, 0x27, 0x9d, 0x55, 0x8a, 0xe9, 0x90, 0x35, 0xab, 0x39, 0x80, 0x4b, 0x94,
+ 0x40, 0x84, 0xa2, 0xfd, 0x73, 0xeb, 0x35, 0x7a,
+ ],
+ )
+ .unwrap(),
+ make_input_values(
+ &[
+ // code hash
+ 0; dice::HASH_SIZE
+ ],
+ &[
+ // authority hash
+ 0x04, 0x25, 0x5d, 0x60, 0x5f, 0x5c, 0x45, 0x0d, 0xf2, 0x9a, 0x6e, 0x99, 0x30, 0x03,
+ 0xb8, 0xd6, 0xe1, 0x99, 0x71, 0x1b, 0xf8, 0x44, 0xfa, 0xb5, 0x31, 0x79, 0x1c, 0x37,
+ 0x68, 0x4e, 0x1d, 0xc0, 0x24, 0x74, 0x68, 0xf8, 0x80, 0x20, 0x3e, 0x44, 0xb1, 0x43,
+ 0xd2, 0x9c, 0xfc, 0x12, 0x9e, 0x77, 0x0a, 0xde, 0x29, 0x24, 0xff, 0x2e, 0xfa, 0xc7,
+ 0x10, 0xd5, 0x73, 0xd4, 0xc6, 0xdf, 0x62, 0x9f,
+ ],
+ "Android", // config name
+ 12, // config version
+ true, // resettable
+ Mode::NORMAL,
+ &[
+ // hidden
+ 0; dice::HIDDEN_SIZE
+ ],
+ )
+ .unwrap(),
+ ]
+}
+
+#[cfg(test)]
+mod test {
+ use super::*;
+
+ // This simple test checks if the invocation succeeds, essentially it tests
+ // if the initial bcc is accepted by `DiceContext::bcc_main_flow`.
+ #[test]
+ fn make_sample_bcc_and_cdis_test() {
+ make_sample_bcc_and_cdis().unwrap();
+ }
+}