widevine-partner/media_cas_packager_sdk_source
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Replace hardcoded parameters

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This commit is contained in:
Lu Chen
2020-01-27 16:05:15 -08:00
parent cdd4d97e0f
commit 5c42bf9b7f
134 changed files with 9510 additions and 1938 deletions
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13
common/crypto_util.h
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@@ -14,7 +14,6 @@
#include <string>
#include "base/macros.h"
#include "absl/strings/string_view.h"
namespace widevine {
@@ -32,6 +31,7 @@ extern const char kIvLabel[];
extern const int kIvSizeBits;
extern const int kAes128KeySizeBits;
extern const int kAes128KeySizeBytes;
extern const char kKeyboxV3Label[];
extern const uint32_t kCENCSchemeID; // 'cenc' (AES-CTR): 0x63656E63
extern const uint32_t kCBC1SchemeID; // 'cbc1' (AES-CBC): 0x63626331
@@ -44,7 +44,7 @@ extern const uint32_t kCBCSSchemeID; // 'cbcs' (AES-CBC subsample): 0x63626373
// AES-CMAC:
// http://tools.ietf.org/html/rfc4493
std::string DeriveKey(absl::string_view key, absl::string_view label,
absl::string_view context, const uint32_t size_bits);
absl::string_view context, const uint32_t size_bits);
// Derives an IV from the provided |context|.
std::string DeriveIv(absl::string_view context);
@@ -53,15 +53,16 @@ std::string DeriveIv(absl::string_view context);
std::string DeriveKeyId(absl::string_view context);
// Helper function to derive a key using the group master key and context.
std::string DeriveGroupSessionKey(absl::string_view context, const uint32_t size_bits);
std::string DeriveGroupSessionKey(absl::string_view context,
const uint32_t size_bits);
// Helper function to derive a signing key for from the signing context.
std::string DeriveSigningKey(absl::string_view key, absl::string_view context,
const uint32_t size_bits);
const uint32_t size_bits);
// Helper function to create a SHA-256 HMAC signature for the given message.
std::string CreateSignatureHmacSha256(absl::string_view key,
absl::string_view message);
absl::string_view message);
// Helper function which compares the SHA-256 HMAC against the provided
// signature.
@@ -71,7 +72,7 @@ bool VerifySignatureHmacSha256(absl::string_view key,
// Helper function to create a SHA-1 HMAC signature for the given message.
std::string CreateSignatureHmacSha1(absl::string_view key,
absl::string_view message);
absl::string_view message);
// Helper function which compares the SHA-1 HMAC against the provided
// signature.