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-rw-r--r--src/shrpx_worker.cc138
1 files changed, 125 insertions, 13 deletions
diff --git a/src/shrpx_worker.cc b/src/shrpx_worker.cc
index 4c069db..e7d6740 100644
--- a/src/shrpx_worker.cc
+++ b/src/shrpx_worker.cc
@@ -731,6 +731,119 @@ int Worker::setup_quic_server_socket() {
return 0;
}
+# ifdef HAVE_LIBBPF
+namespace {
+// https://github.com/kokke/tiny-AES-c
+//
+// License is Public Domain.
+// Commit hash: 12e7744b4919e9d55de75b7ab566326a1c8e7a67
+
+// The number of columns comprising a state in AES. This is a constant
+// in AES. Value=4
+# define Nb 4
+
+# define Nk 4 // The number of 32 bit words in a key.
+# define Nr 10 // The number of rounds in AES Cipher.
+
+// The lookup-tables are marked const so they can be placed in
+// read-only storage instead of RAM The numbers below can be computed
+// dynamically trading ROM for RAM - This can be useful in (embedded)
+// bootloader applications, where ROM is often limited.
+const uint8_t sbox[256] = {
+ // 0 1 2 3 4 5 6 7 8 9 A B C D E F
+ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b,
+ 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
+ 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26,
+ 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
+ 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2,
+ 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
+ 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed,
+ 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
+ 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f,
+ 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
+ 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec,
+ 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
+ 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14,
+ 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
+ 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d,
+ 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
+ 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f,
+ 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
+ 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11,
+ 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
+ 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f,
+ 0xb0, 0x54, 0xbb, 0x16};
+
+# define getSBoxValue(num) (sbox[(num)])
+
+// The round constant word array, Rcon[i], contains the values given
+// by x to the power (i-1) being powers of x (x is denoted as {02}) in
+// the field GF(2^8)
+const uint8_t Rcon[11] = {0x8d, 0x01, 0x02, 0x04, 0x08, 0x10,
+ 0x20, 0x40, 0x80, 0x1b, 0x36};
+
+// This function produces Nb(Nr+1) round keys. The round keys are used
+// in each round to decrypt the states.
+void KeyExpansion(uint8_t *RoundKey, const uint8_t *Key) {
+ unsigned i, j, k;
+ uint8_t tempa[4]; // Used for the column/row operations
+
+ // The first round key is the key itself.
+ for (i = 0; i < Nk; ++i) {
+ RoundKey[(i * 4) + 0] = Key[(i * 4) + 0];
+ RoundKey[(i * 4) + 1] = Key[(i * 4) + 1];
+ RoundKey[(i * 4) + 2] = Key[(i * 4) + 2];
+ RoundKey[(i * 4) + 3] = Key[(i * 4) + 3];
+ }
+
+ // All other round keys are found from the previous round keys.
+ for (i = Nk; i < Nb * (Nr + 1); ++i) {
+ {
+ k = (i - 1) * 4;
+ tempa[0] = RoundKey[k + 0];
+ tempa[1] = RoundKey[k + 1];
+ tempa[2] = RoundKey[k + 2];
+ tempa[3] = RoundKey[k + 3];
+ }
+
+ if (i % Nk == 0) {
+ // This function shifts the 4 bytes in a word to the left once.
+ // [a0,a1,a2,a3] becomes [a1,a2,a3,a0]
+
+ // Function RotWord()
+ {
+ const uint8_t u8tmp = tempa[0];
+ tempa[0] = tempa[1];
+ tempa[1] = tempa[2];
+ tempa[2] = tempa[3];
+ tempa[3] = u8tmp;
+ }
+
+ // SubWord() is a function that takes a four-byte input word and
+ // applies the S-box to each of the four bytes to produce an
+ // output word.
+
+ // Function Subword()
+ {
+ tempa[0] = getSBoxValue(tempa[0]);
+ tempa[1] = getSBoxValue(tempa[1]);
+ tempa[2] = getSBoxValue(tempa[2]);
+ tempa[3] = getSBoxValue(tempa[3]);
+ }
+
+ tempa[0] = tempa[0] ^ Rcon[i / Nk];
+ }
+ j = i * 4;
+ k = (i - Nk) * 4;
+ RoundKey[j + 0] = RoundKey[k + 0] ^ tempa[0];
+ RoundKey[j + 1] = RoundKey[k + 1] ^ tempa[1];
+ RoundKey[j + 2] = RoundKey[k + 2] ^ tempa[2];
+ RoundKey[j + 3] = RoundKey[k + 3] ^ tempa[3];
+ }
+}
+} // namespace
+# endif // HAVE_LIBBPF
+
int Worker::create_quic_server_socket(UpstreamAddr &faddr) {
std::array<char, STRERROR_BUFSIZE> errbuf;
int fd = -1;
@@ -989,30 +1102,29 @@ int Worker::create_quic_server_socket(UpstreamAddr &faddr) {
return -1;
}
- constexpr uint32_t key_high_idx = 1;
- constexpr uint32_t key_low_idx = 2;
-
auto &qkms = conn_handler_->get_quic_keying_materials();
auto &qkm = qkms->keying_materials.front();
- rv = bpf_map__update_elem(sk_info, &key_high_idx, sizeof(key_high_idx),
- qkm.cid_encryption_key.data(),
- qkm.cid_encryption_key.size() / 2, BPF_ANY);
- if (rv != 0) {
+ auto aes_key = bpf_object__find_map_by_name(obj, "aes_key");
+ if (!aes_key) {
auto error = errno;
- LOG(FATAL) << "Failed to update key_high_idx sk_info: "
+ LOG(FATAL) << "Failed to get aes_key: "
<< xsi_strerror(error, errbuf.data(), errbuf.size());
close(fd);
return -1;
}
- rv = bpf_map__update_elem(sk_info, &key_low_idx, sizeof(key_low_idx),
- qkm.cid_encryption_key.data() +
- qkm.cid_encryption_key.size() / 2,
- qkm.cid_encryption_key.size() / 2, BPF_ANY);
+ constexpr size_t expanded_aes_keylen = 176;
+ std::array<uint8_t, expanded_aes_keylen> aes_exp_key;
+
+ KeyExpansion(aes_exp_key.data(), qkm.cid_encryption_key.data());
+
+ rv =
+ bpf_map__update_elem(aes_key, &zero, sizeof(zero), aes_exp_key.data(),
+ aes_exp_key.size(), BPF_ANY);
if (rv != 0) {
auto error = errno;
- LOG(FATAL) << "Failed to update key_low_idx sk_info: "
+ LOG(FATAL) << "Failed to update aes_key: "
<< xsi_strerror(error, errbuf.data(), errbuf.size());
close(fd);
return -1;
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-03 12:48:24 +0000