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CAS demo app

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Adds a new `cas` directory to the ports/linux project. This contains
an end-to-end demo of OEMCrypto CAS functionality, using the Linux
tee_simulator as a base.

Test: from ports/linux/cas dir: `CDM_DIR=~/work/cdm-dupe ./scripts/build.sh && CDM_DIR=~/work/cdm-dupe ./scripts/run.sh`

Merged from https://widevine-internal-review.googlesource.com/178250

Change-Id: I781b403100ad2e069d99650d9ddae8e7acbc309a
This commit is contained in:
Matt Feddersen
2023-03-16 22:52:59 +00:00
committed by Robert Shih
parent 7d989e3448
commit 0dbc42f10e
3 changed files with 125 additions and 26 deletions
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6
libwvdrmengine/oemcrypto/test/oec_session_util.h
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@@ -110,6 +110,8 @@ struct EntitledContentKeyData {
uint8_t content_key_data_iv[KEY_IV_SIZE];
uint8_t content_key_data[KEY_SIZE];
uint8_t encrypted_content_key_data[KEY_SIZE];
uint8_t content_iv[KEY_IV_SIZE];
size_t content_iv_length;
size_t key_index; // Index into the license's key array. Only for testing.
};
@@ -121,6 +123,10 @@ void GenerateSimpleSampleDescription(const std::vector<uint8_t>& in,
OEMCrypto_SampleDescription* sample,
OEMCrypto_SubSampleDescription* subsample);
// Encrypt a block of data using CTR mode.
void EncryptCTR(const vector<uint8_t>& in_buffer, const uint8_t* key,
const uint8_t* starting_iv, vector<uint8_t>* out_buffer);
// Increment counter for AES-CTR. The CENC spec specifies we increment only
// the low 64 bits of the IV counter, and leave the high 64 bits alone. This
// is different from the OpenSSL implementation, so we implement the CTR loop