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Merge "KeyMint: test for unique HMAC results" into main

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David Drysdale
2024-04-29 06:07:59 +00:00
committed by Gerrit Code Review
parent 6857ff20a9 b4598740de
commit e4d1d2dec7
1 changed files with 37 additions and 0 deletions
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37
security/keymint/aidl/vts/functional/KeyMintTest.cpp
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@@ -22,6 +22,7 @@
#include <algorithm>
#include <iostream>
#include <map>
#include <set>
#include <openssl/curve25519.h>
#include <openssl/ec.h>
@@ -3587,6 +3588,42 @@ TEST_P(SigningOperationsTest, HmacAllDigests) {
}
}
/*
* SigningOperationsTest.HmacMessageDigestUnique
*
* Verifies that HMAC with different keys gives different results.
*/
TEST_P(SigningOperationsTest, HmacMessageDigestUnique) {
for (int key_len : {64, 128, 192, 256, 512}) {
for (int msg_len = 0; msg_len <= 30; msg_len += 10) {
string message = string(msg_len, 'x');
for (auto digest : ValidDigests(false /* withNone */, false /* withMD5 */)) {
SCOPED_TRACE(testing::Message() << "Digest::" << digest << "::MsgLen::" << msg_len);
int count = 10;
std::set<string> results;
for (int ii = 0; ii < count; ii++) {
ASSERT_EQ(ErrorCode::OK,
GenerateKey(AuthorizationSetBuilder()
.Authorization(TAG_NO_AUTH_REQUIRED)
.HmacKey(key_len)
.Digest(digest)
.Authorization(TAG_MIN_MAC_LENGTH, 160)))
<< "Failed to create HMAC key with digest " << digest;
string signature = MacMessage(message, digest, 160);
EXPECT_EQ(160U / 8U, signature.size())
<< "Failed to sign with HMAC key with digest " << digest;
CheckedDeleteKey();
results.insert(signature);
}
EXPECT_EQ(results.size(), count)
<< "HMAC of a message '" << message << "' with " << count
<< " fresh keys only gave " << results.size() << " distinct results";
}
}
}
}
/*
* SigningOperationsTest.HmacSha256TooLargeMacLength
*