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Test streaming signature ownership and OpenSSL failures

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evgeny committed 2026-10-24 01:00:36 +02:00
1 parent 5a7823e6ef
commit 4824f3523d
2 files changed
+255 -8
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tests/Makefile.am
+6
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@@ -365,6 +365,12 @@ test_stream_cipher_LDADD = $(LIBUTUN) $(CRYPTO_LIBS) $(COMMON_LIBS)
test_stream_sign_SOURCES = test_stream_sign.c
test_stream_sign_CFLAGS = -I$(top_srcdir)/src -I$(top_srcdir)/lib
test_stream_sign_LDADD = $(LIBUTUN) $(CRYPTO_LIBS) $(COMMON_LIBS)
if OS_LINUX
test_stream_sign_CFLAGS += -DSC_SIGN_FAULT_INJECTION
test_stream_sign_LDFLAGS = -Wl,--wrap=EVP_PKEY_new_raw_private_key -Wl,--wrap=EVP_PKEY_new_raw_public_key \
-Wl,--wrap=EVP_MD_CTX_new -Wl,--wrap=EVP_DigestInit_ex -Wl,--wrap=EVP_DigestFinal_ex \
-Wl,--wrap=EVP_DigestSignInit -Wl,--wrap=EVP_DigestSign -Wl,--wrap=EVP_DigestVerifyInit -Wl,--wrap=EVP_DigestVerify
endif
test_reality_hello_SOURCES = test_reality_hello.c
test_reality_hello_CFLAGS = -I$(top_srcdir)/src -I$(top_srcdir)/src/transport_layer -I$(top_srcdir)/lib
tests/test_stream_sign.c
+249 -8
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@@ -4,6 +4,10 @@
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <openssl/sha.h>
#ifdef SC_SIGN_FAULT_INJECTION
#include <openssl/evp.h>
#endif
static int test_failed = 0;
@@ -16,10 +20,225 @@ static int test_failed = 0;
} \
} while(0)
static int state_empty(const struct sc_stream_sign_state *state) {
return !state->md_ctx && !state->pkey && !state->initialized && !state->is_sign;
}
#ifdef SC_SIGN_FAULT_INJECTION
enum evp_fault {
FAIL_NONE, FAIL_PRIVATE_KEY, FAIL_PUBLIC_KEY, FAIL_MD_NEW, FAIL_MD_INIT,
FAIL_MD_FINAL, FAIL_SIGN_INIT, FAIL_SIGN, FAIL_VERIFY_INIT, FAIL_VERIFY
};
static enum evp_fault pending_fault;
static unsigned fault_hits, evp_calls;
static const char *fault_names[] = {
"none", "private key", "public key", "MD allocation", "MD init",
"MD final", "sign init", "sign", "verify init", "verify"
};
static int fail_evp(enum evp_fault fault) {
evp_calls++;
if (pending_fault != fault) return 0;
pending_fault = FAIL_NONE;
fault_hits++;
DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "Inject EVP failure: %s", fault_names[fault]);
return 1;
}
EVP_PKEY *__real_EVP_PKEY_new_raw_private_key(int type, ENGINE *engine, const unsigned char *key, size_t len);
EVP_PKEY *__wrap_EVP_PKEY_new_raw_private_key(int type, ENGINE *engine, const unsigned char *key, size_t len) {
return fail_evp(FAIL_PRIVATE_KEY) ? NULL : __real_EVP_PKEY_new_raw_private_key(type, engine, key, len);
}
EVP_PKEY *__real_EVP_PKEY_new_raw_public_key(int type, ENGINE *engine, const unsigned char *key, size_t len);
EVP_PKEY *__wrap_EVP_PKEY_new_raw_public_key(int type, ENGINE *engine, const unsigned char *key, size_t len) {
return fail_evp(FAIL_PUBLIC_KEY) ? NULL : __real_EVP_PKEY_new_raw_public_key(type, engine, key, len);
}
EVP_MD_CTX *__real_EVP_MD_CTX_new(void);
EVP_MD_CTX *__wrap_EVP_MD_CTX_new(void) {
return fail_evp(FAIL_MD_NEW) ? NULL : __real_EVP_MD_CTX_new();
}
int __real_EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *engine);
int __wrap_EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *engine) {
return fail_evp(FAIL_MD_INIT) ? 0 : __real_EVP_DigestInit_ex(ctx, type, engine);
}
int __real_EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *len);
int __wrap_EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *len) {
return fail_evp(FAIL_MD_FINAL) ? 0 : __real_EVP_DigestFinal_ex(ctx, md, len);
}
int __real_EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pkctx, const EVP_MD *type, ENGINE *engine, EVP_PKEY *key);
int __wrap_EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pkctx, const EVP_MD *type, ENGINE *engine, EVP_PKEY *key) {
return fail_evp(FAIL_SIGN_INIT) ? 0 : __real_EVP_DigestSignInit(ctx, pkctx, type, engine, key);
}
int __real_EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen, const unsigned char *data, size_t len);
int __wrap_EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen, const unsigned char *data, size_t len) {
return fail_evp(FAIL_SIGN) ? 0 : __real_EVP_DigestSign(ctx, sig, siglen, data, len);
}
int __real_EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pkctx, const EVP_MD *type, ENGINE *engine, EVP_PKEY *key);
int __wrap_EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pkctx, const EVP_MD *type, ENGINE *engine, EVP_PKEY *key) {
return fail_evp(FAIL_VERIFY_INIT) ? 0 : __real_EVP_DigestVerifyInit(ctx, pkctx, type, engine, key);
}
int __real_EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sig, size_t siglen, const unsigned char *data, size_t len);
int __wrap_EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sig, size_t siglen, const unsigned char *data, size_t len) {
return fail_evp(FAIL_VERIFY) ? 0 : __real_EVP_DigestVerify(ctx, sig, siglen, data, len);
}
// Реальные free не перехватываются: sanitizer должен видеть повторное освобождение и утечки.
static void test_init_failures(sc_context_t *ctx, const uint8_t *pubkey, const uint8_t *message,
size_t message_len, const uint8_t *reference_sig) {
for (int verify = 0; verify < 2; verify++) {
enum evp_fault failures[] = {FAIL_MD_NEW, FAIL_MD_INIT, verify ? FAIL_PUBLIC_KEY : FAIL_PRIVATE_KEY};
for (size_t i = 0; i < sizeof(failures) / sizeof(failures[0]); i++) {
struct sc_stream_sign_state state = {0};
pending_fault = failures[i]; fault_hits = 0;
int rc = verify ? sc_stream_sign_verify_init(&state, pubkey) : sc_stream_sign_init(ctx, &state);
DEBUG_INFO(DEBUG_CATEGORY_DEBUG, "Init failure: verify=%d stage=%s rc=%d empty=%d",
verify, fault_names[failures[i]], rc, state_empty(&state));
CHECK(rc == SC_ERR_CRYPTO && fault_hits == 1 && pending_fault == FAIL_NONE, "init fault consumed once");
CHECK(state_empty(&state), "failed init leaves every state field empty");
if (test_failed) return;
sc_stream_sign_cleanup(&state);
sc_stream_sign_cleanup(&state);
CHECK(state_empty(&state), "double cleanup after failed init");
uint8_t sig[SC_SIGN_SIZE];
size_t sig_len = sizeof(sig);
CHECK(sc_stream_sign_final(&state, sig, &sig_len) == SC_ERR_NOT_INITIALIZED, "final after failed init");
CHECK(sc_stream_sign_verify(&state, reference_sig, SC_SIGN_SIZE) == SC_ERR_NOT_INITIALIZED,
"verify after failed init");
rc = verify ? sc_stream_sign_verify_init(&state, pubkey) : sc_stream_sign_init(ctx, &state);
CHECK(rc == SC_OK, "retry init after allocation failure");
if (test_failed) return;
CHECK(sc_stream_sign_update(&state, message, message_len) == SC_OK, "retry update");
rc = verify ? sc_stream_sign_verify(&state, reference_sig, SC_SIGN_SIZE)
: sc_stream_sign_final(&state, sig, &sig_len);
CHECK(rc == SC_OK && (verify || !memcmp(sig, reference_sig, SC_SIGN_SIZE)), "retry operation succeeds");
CHECK(state_empty(&state), "retry operation releases all state");
sc_stream_sign_cleanup(&state);
if (test_failed) return;
}
}
}
static void test_finish_failures(sc_context_t *ctx, const uint8_t *pubkey, const uint8_t *message,
size_t message_len, const uint8_t *reference_sig) {
for (int verify = 0; verify < 2; verify++) {
enum evp_fault failures[] = {FAIL_MD_FINAL, FAIL_MD_NEW, verify ? FAIL_VERIFY_INIT : FAIL_SIGN_INIT,
verify ? FAIL_VERIFY : FAIL_SIGN};
for (size_t i = 0; i < sizeof(failures) / sizeof(failures[0]); i++) {
struct sc_stream_sign_state state = {0};
int rc = verify ? sc_stream_sign_verify_init(&state, pubkey) : sc_stream_sign_init(ctx, &state);
CHECK(rc == SC_OK, "finish fault: init");
if (test_failed) return;
CHECK(sc_stream_sign_update(&state, message, message_len) == SC_OK, "finish fault: update");
pending_fault = failures[i]; fault_hits = 0;
uint8_t sig[SC_SIGN_SIZE];
size_t sig_len = sizeof(sig);
rc = verify ? sc_stream_sign_verify(&state, reference_sig, SC_SIGN_SIZE)
: sc_stream_sign_final(&state, sig, &sig_len);
DEBUG_INFO(DEBUG_CATEGORY_DEBUG, "Finish failure: verify=%d stage=%s rc=%d empty=%d",
verify, fault_names[failures[i]], rc, state_empty(&state));
CHECK(rc < 0 && fault_hits == 1 && pending_fault == FAIL_NONE, "finish fault consumed once");
CHECK(state_empty(&state), "failed finish leaves every state field empty");
if (test_failed) return;
sc_stream_sign_cleanup(&state);
sc_stream_sign_cleanup(&state);
rc = verify ? sc_stream_sign_verify_init(&state, pubkey) : sc_stream_sign_init(ctx, &state);
CHECK(rc == SC_OK, "finish fault: reuse init");
if (test_failed) return;
CHECK(sc_stream_sign_update(&state, message, message_len) == SC_OK, "finish fault: reuse update");
sig_len = sizeof(sig);
rc = verify ? sc_stream_sign_verify(&state, reference_sig, SC_SIGN_SIZE)
: sc_stream_sign_final(&state, sig, &sig_len);
CHECK(rc == SC_OK && (verify || !memcmp(sig, reference_sig, SC_SIGN_SIZE)), "finish fault: reuse succeeds");
CHECK(state_empty(&state), "finish fault: reused state empty");
sc_stream_sign_cleanup(&state);
if (test_failed) return;
}
}
}
#endif
static void test_active_init(sc_context_t *ctx, const uint8_t *pubkey, const uint8_t *message,
size_t message_len, const uint8_t *reference_sig) {
for (int verify = 0; verify < 2; verify++) {
for (int next_verify = 0; next_verify < 2; next_verify++) {
struct sc_stream_sign_state state = {0};
int rc = verify ? sc_stream_sign_verify_init(&state, pubkey) : sc_stream_sign_init(ctx, &state);
CHECK(rc == SC_OK, "active init: first init");
if (test_failed) return;
CHECK(sc_stream_sign_update(&state, message, 3) == SC_OK, "active init: prefix");
void *md_ctx = state.md_ctx, *pkey = state.pkey;
#ifdef SC_SIGN_FAULT_INJECTION
unsigned calls_before = evp_calls;
#endif
rc = next_verify ? sc_stream_sign_verify_init(&state, pubkey) : sc_stream_sign_init(ctx, &state);
CHECK(rc == SC_ERR_INVALID_ARG, "active init is rejected");
CHECK(sc_stream_sign_init(NULL, &state) == SC_ERR_INVALID_ARG, "invalid signing init preserves state");
CHECK(sc_stream_sign_verify_init(&state, NULL) == SC_ERR_INVALID_ARG, "invalid verify init preserves state");
sc_context_t empty_ctx = {0};
CHECK(sc_stream_sign_init(&empty_ctx, &state) < 0, "uninitialized signing ctx preserves active state");
CHECK(state.md_ctx == md_ctx && state.pkey == pkey && state.initialized && state.is_sign == !verify,
"active init preserves resources and mode");
#ifdef SC_SIGN_FAULT_INJECTION
CHECK(evp_calls == calls_before, "active init does not call EVP");
#endif
if (test_failed) return;
uint8_t sig[SC_SIGN_SIZE];
size_t sig_len = sizeof(sig);
CHECK(sc_stream_sign_final(&state, NULL, &sig_len) == SC_ERR_INVALID_ARG, "NULL signature output preserves state");
CHECK(sc_stream_sign_final(&state, sig, NULL) == SC_ERR_INVALID_ARG, "NULL signature length preserves state");
CHECK(sc_stream_sign_verify(&state, NULL, SC_SIGN_SIZE) == SC_ERR_INVALID_ARG, "NULL signature preserves state");
rc = verify ? sc_stream_sign_final(&state, sig, &sig_len)
: sc_stream_sign_verify(&state, reference_sig, SC_SIGN_SIZE);
CHECK(rc == SC_ERR_NOT_INITIALIZED, "wrong finishing mode is rejected");
CHECK(sc_stream_sign_update(&state, message + 3, message_len - 3) == SC_OK, "active init: suffix");
rc = verify ? sc_stream_sign_verify(&state, reference_sig, SC_SIGN_SIZE)
: sc_stream_sign_final(&state, sig, &sig_len);
CHECK(rc == SC_OK && (verify || !memcmp(sig, reference_sig, SC_SIGN_SIZE)), "original message and key preserved");
CHECK(state_empty(&state), "completed operation is empty");
sc_stream_sign_cleanup(&state);
if (test_failed) return;
DEBUG_INFO(DEBUG_CATEGORY_DEBUG, "Active init: verify=%d next_verify=%d, original operation completed", verify, next_verify);
}
}
}
static void test_short_buffer(sc_context_t *ctx, const uint8_t *message, size_t len, const uint8_t *reference_sig) {
struct sc_stream_sign_state state = {0};
CHECK(sc_stream_sign_init(ctx, &state) == SC_OK, "short buffer: init");
CHECK(sc_stream_sign_update(&state, message, len) == SC_OK, "short buffer: update");
if (test_failed) return;
uint8_t output[SC_SIGN_SIZE + 2], untouched[sizeof(output)];
memset(output, 0xA5, sizeof(output));
memcpy(untouched, output, sizeof(output));
for (size_t capacity = 0; capacity < SC_SIGN_SIZE; capacity += SC_SIGN_SIZE - 1) {
size_t sig_len = capacity;
CHECK(sc_stream_sign_final(&state, output + 1, &sig_len) == SC_ERR_INVALID_ARG, "short buffer rejected before final");
CHECK(sig_len == capacity && !memcmp(output, untouched, sizeof(output)), "short buffer and length unchanged");
CHECK(state.initialized && state.is_sign, "short buffer preserves active signature");
if (test_failed) return;
}
size_t sig_len = SC_SIGN_SIZE;
CHECK(sc_stream_sign_final(&state, output + 1, &sig_len) == SC_OK, "short buffer: retry with exact capacity");
CHECK(sig_len == SC_SIGN_SIZE && !memcmp(output + 1, reference_sig, SC_SIGN_SIZE), "short buffer retry preserves hash");
CHECK(output[0] == 0xA5 && output[sizeof(output) - 1] == 0xA5, "signature output canaries intact");
CHECK(state_empty(&state), "short buffer: successful retry releases state");
sc_stream_sign_cleanup(&state);
sc_stream_sign_cleanup(&state);
}
int main(void) {
debug_config_init();
debug_set_level(DEBUG_LEVEL_INFO);
debug_set_categories(DEBUG_CATEGORY_CRYPTO);
debug_set_category_level(DEBUG_CATEGORY_DEBUG, DEBUG_LEVEL_DEBUG);
DEBUG_INFO(DEBUG_CATEGORY_CRYPTO, "=== Streaming Sign Test ===");
@@ -32,6 +251,24 @@ int main(void) {
uint8_t ed25519_pubkey_a[SC_PUBKEY_SIZE];
CHECK(sc_derive_ed25519_pubkey(keys_a.private_key, ed25519_pubkey_a) == SC_OK, "derive ed25519 pubkey from x25519");
// Независимый эталон формата: one-shot Ed25519 над SHA512 сообщения.
uint8_t message[] = "stream signature lifecycle", reference_sig[SC_SIGN_SIZE];
uint8_t seed_hash[64], message_hash[64];
SHA512(keys_a.private_key, SC_PRIVKEY_SIZE, seed_hash);
SHA512(message, sizeof(message), message_hash);
CHECK(sc_ed25519_sign(seed_hash, message_hash, sizeof(message_hash), reference_sig) == SC_OK, "one-shot reference signature");
if (test_failed) return 1;
#ifdef SC_SIGN_FAULT_INJECTION
test_init_failures(&ctx_a, ed25519_pubkey_a, message, sizeof(message), reference_sig);
if (test_failed) return 1;
test_finish_failures(&ctx_a, ed25519_pubkey_a, message, sizeof(message), reference_sig);
if (test_failed) return 1;
#endif
test_active_init(&ctx_a, ed25519_pubkey_a, message, sizeof(message), reference_sig);
if (test_failed) return 1;
test_short_buffer(&ctx_a, message, sizeof(message), reference_sig);
if (test_failed) return 1;
// ==========================================
// Test 1: basic sign/verify — single chunk
// ==========================================
@@ -39,7 +276,7 @@ int main(void) {
uint8_t data[1024];
for (int i = 0; i < (int)sizeof(data); i++) data[i] = (uint8_t)(i * 7 + 31);
struct sc_stream_sign_state signer, verifier;
struct sc_stream_sign_state signer = {0}, verifier = {0};
CHECK(sc_stream_sign_init(&ctx_a, &signer) == SC_OK, "sign_init");
CHECK(sc_stream_sign_verify_init(&verifier, ed25519_pubkey_a) == SC_OK, "verify_init");
@@ -61,7 +298,7 @@ int main(void) {
uint8_t data[2048];
for (int i = 0; i < (int)sizeof(data); i++) data[i] = (uint8_t)(i * 3 + 17);
struct sc_stream_sign_state signer, verifier;
struct sc_stream_sign_state signer = {0}, verifier = {0};
CHECK(sc_stream_sign_init(&ctx_a, &signer) == SC_OK, "inc: sign_init");
CHECK(sc_stream_sign_verify_init(&verifier, ed25519_pubkey_a) == SC_OK, "inc: verify_init");
@@ -85,7 +322,7 @@ int main(void) {
uint8_t data[512];
for (int i = 0; i < (int)sizeof(data); i++) data[i] = (uint8_t)(i * 5 + 7);
struct sc_stream_sign_state signer, verifier;
struct sc_stream_sign_state signer = {0}, verifier = {0};
CHECK(sc_stream_sign_init(&ctx_a, &signer) == SC_OK, "tamper: sign_init");
CHECK(sc_stream_sign_verify_init(&verifier, ed25519_pubkey_a) == SC_OK, "tamper: verify_init");
@@ -98,6 +335,8 @@ int main(void) {
data[0] ^= 0x01;
CHECK(sc_stream_sign_update(&verifier, data, sizeof(data)) == SC_OK, "tamper: verify_update (modified)");
CHECK(sc_stream_sign_verify(&verifier, sig, sig_len) == SC_ERR_AUTH_FAILED, "tamper: verify FAIL (expected)");
CHECK(state_empty(&verifier), "tamper: failed verification releases state");
sc_stream_sign_cleanup(&verifier);
}
// ==========================================
@@ -112,7 +351,7 @@ int main(void) {
uint8_t data[256];
for (int i = 0; i < (int)sizeof(data); i++) data[i] = (uint8_t)i;
struct sc_stream_sign_state signer, verifier;
struct sc_stream_sign_state signer = {0}, verifier = {0};
CHECK(sc_stream_sign_init(&ctx_a, &signer) == SC_OK, "wrongkey: sign_init (A)");
CHECK(sc_stream_sign_verify_init(&verifier, pubkey_b) == SC_OK, "wrongkey: verify_init (B's key)");
@@ -124,13 +363,15 @@ int main(void) {
CHECK(sc_stream_sign_final(&signer, sig, &sig_len) == SC_OK, "wrongkey: sign_final");
CHECK(sc_stream_sign_verify(&verifier, sig, sig_len) == SC_ERR_AUTH_FAILED, "wrongkey: verify FAIL (expected)");
CHECK(state_empty(&verifier), "wrongkey: failed verification releases state");
sc_stream_sign_cleanup(&verifier);
}
// ==========================================
// Test 5: empty data — sign/verify empty message
// ==========================================
{
struct sc_stream_sign_state signer, verifier;
struct sc_stream_sign_state signer = {0}, verifier = {0};
CHECK(sc_stream_sign_init(&ctx_a, &signer) == SC_OK, "empty: sign_init");
CHECK(sc_stream_sign_verify_init(&verifier, ed25519_pubkey_a) == SC_OK, "empty: verify_init");
@@ -148,7 +389,7 @@ int main(void) {
uint8_t data[64];
for (int i = 0; i < (int)sizeof(data); i++) data[i] = (uint8_t)(i * 11);
struct sc_stream_sign_state signer;
struct sc_stream_sign_state signer = {0};
CHECK(sc_stream_sign_init(&ctx_a, &signer) == SC_OK, "zerolen: sign_init");
CHECK(sc_stream_sign_update(&signer, NULL, 0) == SC_OK, "zerolen: NULL+0 OK");
CHECK(sc_stream_sign_update(&signer, data, 0) == SC_OK, "zerolen: data+0 OK");
@@ -191,7 +432,7 @@ int main(void) {
// Test 9: error handling — final/verify on wrong init
// ==========================================
{
struct sc_stream_sign_state verifier;
struct sc_stream_sign_state verifier = {0};
CHECK(sc_stream_sign_verify_init(&verifier, ed25519_pubkey_a) == SC_OK, "err: verify_init for final test");
uint8_t sig[SC_SIGN_SIZE] = {0};
@@ -200,7 +441,7 @@ int main(void) {
sc_stream_sign_cleanup(&verifier);
}
{
struct sc_stream_sign_state signer;
struct sc_stream_sign_state signer = {0};
CHECK(sc_stream_sign_init(&ctx_a, &signer) == SC_OK, "err: sign_init for verify test");
uint8_t sig[SC_SIGN_SIZE] = {0};
CHECK(sc_stream_sign_verify(&signer, sig, SC_SIGN_SIZE) == SC_ERR_NOT_INITIALIZED, "err: verify on sign state");