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Implement transient certs

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Add wolfSSL_CertManagerUnloadIntermediateCerts API to clear intermediate certs added to store.
This commit is contained in:
Juliusz Sosinowicz
2024-02-07 13:54:12 +01:00
parent af2b2dddb4
commit 4caef93346
6 changed files with 233 additions and 18 deletions
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17
src/ssl.c
View File

@ -5954,6 +5954,7 @@ int AddCA(WOLFSSL_CERT_MANAGER* cm, DerBuffer** pDer, int type, int verify)
cert->permittedNames = NULL;
cert->excludedNames = NULL;
#endif
signer->type = (byte)type;
#ifndef NO_SKID
row = HashSigner(signer->subjectKeyIdHash);
@ -16355,6 +16356,22 @@ int wolfSSL_set_compression(WOLFSSL* ssl)
return wolfSSL_CertManagerUnloadCAs(ctx->cm);
}
int wolfSSL_CTX_UnloadIntermediateCerts(WOLFSSL_CTX* ctx)
{
WOLFSSL_ENTER("wolfSSL_CTX_UnloadIntermediateCerts");
if (ctx == NULL)
return BAD_FUNC_ARG;
if (ctx->ref.count > 1) {
WOLFSSL_MSG("ctx object must have a ref count of 1 before "
"unloading intermediate certs");
return BAD_STATE_E;
}
return wolfSSL_CertManagerUnloadIntermediateCerts(ctx->cm);
}
#ifdef WOLFSSL_TRUST_PEER_CERT
int wolfSSL_CTX_Unload_trust_peers(WOLFSSL_CTX* ctx)

25
src/ssl_certman.c
View File

@ -457,6 +457,31 @@ int wolfSSL_CertManagerUnloadCAs(WOLFSSL_CERT_MANAGER* cm)
return ret;
}
int wolfSSL_CertManagerUnloadIntermediateCerts(WOLFSSL_CERT_MANAGER* cm)
{
int ret = WOLFSSL_SUCCESS;
WOLFSSL_ENTER("wolfSSL_CertManagerUnloadIntermediateCerts");
/* Validate parameter. */
if (cm == NULL) {
ret = BAD_FUNC_ARG;
}
/* Lock CA table. */
if ((ret == WOLFSSL_SUCCESS) && (wc_LockMutex(&cm->caLock) != 0)) {
ret = BAD_MUTEX_E;
}
if (ret == WOLFSSL_SUCCESS) {
/* Dispose of CA table. */
FreeSignerTableType(cm->caTable, CA_TABLE_SIZE, WOLFSSL_CHAIN_CA,
cm->heap);
/* Unlock CA table. */
wc_UnLockMutex(&cm->caLock);
}
return ret;
}
#ifdef WOLFSSL_TRUST_PEER_CERT
/* Unload the trusted peers table.

181
tests/api.c
View File

@ -441,6 +441,7 @@ typedef struct test_ssl_cbf {
ctx_cb ctx_ready;
ssl_cb ssl_ready;
ssl_cb on_result;
ctx_cb on_ctx_cleanup;
ssl_cb on_cleanup;
hs_cb on_handshake;
WOLFSSL_CTX* ctx;
@ -6149,8 +6150,10 @@ static WC_INLINE int test_ssl_memio_setup(test_ssl_memio_ctx *ctx)
int c_sharedCtx = 0;
int s_sharedCtx = 0;
#endif
const char* certFile = svrCertFile;
const char* keyFile = svrKeyFile;
const char* clientCertFile = cliCertFile;
const char* clientKeyFile = cliKeyFile;
const char* serverCertFile = svrCertFile;
const char* serverKeyFile = svrKeyFile;
/********************************
* Create WOLFSSL_CTX for client.
@ -6182,13 +6185,19 @@ static WC_INLINE int test_ssl_memio_setup(test_ssl_memio_ctx *ctx)
else
ExpectIntEQ(wolfSSL_CTX_load_verify_locations(ctx->c_ctx,
caCertFile, 0), WOLFSSL_SUCCESS);
if (ctx->c_cb.certPemFile != NULL) {
clientCertFile = ctx->c_cb.certPemFile;
}
if (ctx->c_cb.keyPemFile != NULL) {
clientKeyFile = ctx->c_cb.keyPemFile;
}
#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EITHER_SIDE)
if (!c_sharedCtx)
#endif
{
ExpectIntEQ(wolfSSL_CTX_use_certificate_chain_file(ctx->c_ctx,
cliCertFile), WOLFSSL_SUCCESS);
ExpectIntEQ(wolfSSL_CTX_use_PrivateKey_file(ctx->c_ctx, cliKeyFile,
clientCertFile), WOLFSSL_SUCCESS);
ExpectIntEQ(wolfSSL_CTX_use_PrivateKey_file(ctx->c_ctx, clientKeyFile,
WOLFSSL_FILETYPE_PEM), WOLFSSL_SUCCESS);
}
#ifdef HAVE_CRL
@ -6255,23 +6264,23 @@ static WC_INLINE int test_ssl_memio_setup(test_ssl_memio_ctx *ctx)
wolfSSL_CTX_set_default_passwd_cb(ctx->s_ctx, PasswordCallBack);
#endif
if (ctx->s_cb.certPemFile != NULL) {
certFile = ctx->s_cb.certPemFile;
serverCertFile = ctx->s_cb.certPemFile;
}
#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EITHER_SIDE)
if (!s_sharedCtx)
#endif
{
ExpectIntEQ(wolfSSL_CTX_use_certificate_chain_file(ctx->s_ctx,
certFile), WOLFSSL_SUCCESS);
serverCertFile), WOLFSSL_SUCCESS);
}
if (ctx->s_cb.keyPemFile != NULL) {
keyFile = ctx->s_cb.keyPemFile;
serverKeyFile = ctx->s_cb.keyPemFile;
}
#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EITHER_SIDE)
if (!s_sharedCtx)
#endif
{
ExpectIntEQ(wolfSSL_CTX_use_PrivateKey_file(ctx->s_ctx, keyFile,
ExpectIntEQ(wolfSSL_CTX_use_PrivateKey_file(ctx->s_ctx, serverKeyFile,
WOLFSSL_FILETYPE_PEM), WOLFSSL_SUCCESS);
}
if (ctx->s_ciphers != NULL) {
@ -6295,9 +6304,9 @@ static WC_INLINE int test_ssl_memio_setup(test_ssl_memio_ctx *ctx)
#endif
)
{
ExpectIntEQ(wolfSSL_use_certificate_chain_file(ctx->c_ssl, cliCertFile),
WOLFSSL_SUCCESS);
ExpectIntEQ(wolfSSL_use_PrivateKey_file(ctx->c_ssl, cliKeyFile,
ExpectIntEQ(wolfSSL_use_certificate_chain_file(ctx->c_ssl,
clientCertFile), WOLFSSL_SUCCESS);
ExpectIntEQ(wolfSSL_use_PrivateKey_file(ctx->c_ssl, clientKeyFile,
WOLFSSL_FILETYPE_PEM), WOLFSSL_SUCCESS);
}
if (ctx->c_cb.ssl_ready != NULL) {
@ -6316,9 +6325,9 @@ static WC_INLINE int test_ssl_memio_setup(test_ssl_memio_ctx *ctx)
#endif
)
{
ExpectIntEQ(wolfSSL_use_certificate_chain_file(ctx->s_ssl, certFile),
WOLFSSL_SUCCESS);
ExpectIntEQ(wolfSSL_use_PrivateKey_file(ctx->s_ssl, keyFile,
ExpectIntEQ(wolfSSL_use_certificate_chain_file(ctx->s_ssl,
serverCertFile), WOLFSSL_SUCCESS);
ExpectIntEQ(wolfSSL_use_PrivateKey_file(ctx->s_ssl, serverKeyFile,
WOLFSSL_FILETYPE_PEM), WOLFSSL_SUCCESS);
}
#if !defined(NO_FILESYSTEM) && !defined(NO_DH)
@ -6400,7 +6409,7 @@ static int test_ssl_memio_do_handshake(test_ssl_memio_ctx* ctx, int max_rounds,
}
}
if (!handshake_complete) {
if (!handshake_complete || failing_c || failing_s) {
return TEST_FAIL;
}
@ -6468,14 +6477,20 @@ static void test_ssl_memio_cleanup(test_ssl_memio_ctx* ctx)
wolfSSL_shutdown(ctx->c_ssl);
wolfSSL_free(ctx->s_ssl);
wolfSSL_free(ctx->c_ssl);
if (!ctx->s_cb.isSharedCtx) {
wolfSSL_CTX_free(ctx->s_ctx);
ctx->s_ctx = NULL;
if (ctx->c_cb.on_ctx_cleanup != NULL) {
ctx->c_cb.on_ctx_cleanup(ctx->c_ctx);
}
if (!ctx->c_cb.isSharedCtx) {
wolfSSL_CTX_free(ctx->c_ctx);
ctx->c_ctx = NULL;
}
if (ctx->s_cb.on_ctx_cleanup != NULL) {
ctx->s_cb.on_ctx_cleanup(ctx->s_ctx);
}
if (!ctx->s_cb.isSharedCtx) {
wolfSSL_CTX_free(ctx->s_ctx);
ctx->s_ctx = NULL;
}
if (!ctx->s_cb.ticNoInit) {
#if defined(HAVE_SESSION_TICKET) && \
@ -69972,6 +69987,135 @@ static int test_get_signature_nid(void)
return EXPECT_RESULT();
}
#if !defined(NO_CERTS) && defined(HAVE_SSL_MEMIO_TESTS_DEPENDENCIES)
static word32 test_tls_cert_store_unchanged_HashCaTable(Signer** caTable)
{
#ifndef NO_MD5
enum wc_HashType hashType = WC_HASH_TYPE_MD5;
#elif !defined(NO_SHA)
enum wc_HashType hashType = WC_HASH_TYPE_SHA;
#elif !defined(NO_SHA256)
enum wc_HashType hashType = WC_HASH_TYPE_SHA256;
#else
#error "We need a digest to hash the Signer object"
#endif
byte hashBuf[WC_MAX_DIGEST_SIZE];
wc_HashAlg hash;
size_t i;
AssertIntEQ(wc_HashInit(&hash, hashType), 0);
for (i = 0; i < CA_TABLE_SIZE; i++) {
Signer* cur;
for (cur = caTable[i]; cur != NULL; cur = cur->next)
AssertIntEQ(wc_HashUpdate(&hash, hashType, (byte*)cur,
sizeof(*cur)), 0);
}
AssertIntEQ(wc_HashFinal(&hash, hashType, hashBuf), 0);
AssertIntEQ(wc_HashFree(&hash, hashType), 0);
return MakeWordFromHash(hashBuf);
}
static word32 test_tls_cert_store_unchanged_before_hashes[2];
static size_t test_tls_cert_store_unchanged_before_hashes_idx = 0;
static word32 test_tls_cert_store_unchanged_after_hashes[2];
static size_t test_tls_cert_store_unchanged_after_hashes_idx = 0;
static int test_tls_cert_store_unchanged_ctx_ready(WOLFSSL_CTX* ctx)
{
EXPECT_DECLS;
ExpectIntNE(test_tls_cert_store_unchanged_before_hashes
[test_tls_cert_store_unchanged_before_hashes_idx++] =
test_tls_cert_store_unchanged_HashCaTable(ctx->cm->caTable), 0);
wolfSSL_CTX_set_verify(ctx, WOLFSSL_VERIFY_PEER |
WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT, 0);
return EXPECT_RESULT();
}
static int test_tls_cert_store_unchanged_ctx_cleanup(WOLFSSL_CTX* ctx)
{
EXPECT_DECLS;
ExpectIntEQ(wolfSSL_CTX_UnloadIntermediateCerts(ctx), WOLFSSL_SUCCESS);
ExpectIntNE(test_tls_cert_store_unchanged_after_hashes
[test_tls_cert_store_unchanged_after_hashes_idx++] =
test_tls_cert_store_unchanged_HashCaTable(ctx->cm->caTable), 0);
return EXPECT_RESULT();
}
/*
static int test_tls_cert_store_unchanged_on_hs(WOLFSSL_CTX **ctx, WOLFSSL **ssl)
{
EXPECT_DECLS;
(void)ssl;
ExpectIntNE(test_tls_cert_store_unchanged_after_hashes
[test_tls_cert_store_unchanged_after_hashes_idx++] =
test_tls_cert_store_unchanged_HashCaTable((*ctx)->cm->caTable), 0);
return EXPECT_RESULT();
}
*/
static int test_tls_cert_store_unchanged_ssl_ready(WOLFSSL* ssl)
{
EXPECT_DECLS;
WOLFSSL_CTX* ctx;
ExpectNotNull(ctx = wolfSSL_get_SSL_CTX(ssl));
return EXPECT_RESULT();
}
#endif
static int test_tls_cert_store_unchanged(void)
{
EXPECT_DECLS;
#if !defined(NO_CERTS) && defined(HAVE_SSL_MEMIO_TESTS_DEPENDENCIES)
test_ssl_cbf client_cbf;
test_ssl_cbf server_cbf;
XMEMSET(&client_cbf, 0, sizeof(client_cbf));
XMEMSET(&server_cbf, 0, sizeof(server_cbf));
XMEMSET(test_tls_cert_store_unchanged_before_hashes, 0,
sizeof(test_tls_cert_store_unchanged_before_hashes));
XMEMSET(test_tls_cert_store_unchanged_after_hashes, 0,
sizeof(test_tls_cert_store_unchanged_after_hashes));
client_cbf.ctx_ready = test_tls_cert_store_unchanged_ctx_ready;
server_cbf.ctx_ready = test_tls_cert_store_unchanged_ctx_ready;
client_cbf.ssl_ready = test_tls_cert_store_unchanged_ssl_ready;
server_cbf.ssl_ready = test_tls_cert_store_unchanged_ssl_ready;
/* TODO add API to allow clearing/not storing certs while connections are
* still active.
client_cbf.on_handshake = test_tls_cert_store_unchanged_on_hs;
server_cbf.on_handshake = test_tls_cert_store_unchanged_on_hs;
*/
client_cbf.on_ctx_cleanup = test_tls_cert_store_unchanged_ctx_cleanup;
server_cbf.on_ctx_cleanup = test_tls_cert_store_unchanged_ctx_cleanup;
client_cbf.certPemFile = "certs/intermediate/client-chain.pem";
server_cbf.certPemFile = "certs/intermediate/server-chain.pem";
server_cbf.caPemFile = caCertFile;
ExpectIntEQ(test_wolfSSL_client_server_nofail_memio(&client_cbf,
&server_cbf, NULL), TEST_SUCCESS);
ExpectBufEQ(test_tls_cert_store_unchanged_before_hashes,
test_tls_cert_store_unchanged_after_hashes,
sizeof(test_tls_cert_store_unchanged_after_hashes));
#endif
return EXPECT_RESULT();
}
/*----------------------------------------------------------------------------*
| Main
*----------------------------------------------------------------------------*/
@ -71281,6 +71425,7 @@ TEST_CASE testCases[] = {
TEST_DECL(test_write_dup),
TEST_DECL(test_read_write_hs),
TEST_DECL(test_get_signature_nid),
TEST_DECL(test_tls_cert_store_unchanged),
/* This test needs to stay at the end to clean up any caches allocated. */
TEST_DECL(test_wolfSSL_Cleanup)
};

22
wolfcrypt/src/asn.c
View File

@ -23610,6 +23610,28 @@ void FreeSignerTable(Signer** table, int rows, void* heap)
}
}
void FreeSignerTableType(Signer** table, int rows, byte type, void* heap)
{
int i;
for (i = 0; i < rows; i++) {
Signer* signer = table[i];
Signer** next = &table[i];
while (signer) {
if (signer->type == type) {
*next = signer->next;
FreeSigner(signer, heap);
signer = *next;
}
else {
next = &signer->next;
signer = signer->next;
}
}
}
}
#ifdef WOLFSSL_TRUST_PEER_CERT
/* Free an individual trusted peer cert.
*

3
wolfssl/ssl.h
View File

@ -3063,6 +3063,7 @@ WOLFSSL_API int wolfSSL_make_eap_keys(WOLFSSL* ssl, void* key, unsigned int len,
#ifndef NO_CERTS
/* SSL_CTX versions */
WOLFSSL_API int wolfSSL_CTX_UnloadCAs(WOLFSSL_CTX* ctx);
WOLFSSL_API int wolfSSL_CTX_UnloadIntermediateCerts(WOLFSSL_CTX* ctx);
#ifdef WOLFSSL_TRUST_PEER_CERT
WOLFSSL_API int wolfSSL_CTX_Unload_trust_peers(WOLFSSL_CTX* ctx);
#ifdef WOLFSSL_LOCAL_X509_STORE
@ -3617,6 +3618,8 @@ WOLFSSL_API void wolfSSL_CTX_SetPerformTlsRecordProcessingCb(WOLFSSL_CTX* ctx,
const unsigned char* buff, long sz, int format);
WOLFSSL_API int wolfSSL_CertManagerUnloadCAs(WOLFSSL_CERT_MANAGER* cm);
WOLFSSL_API int wolfSSL_CertManagerUnloadIntermediateCerts(
WOLFSSL_CERT_MANAGER* cm);
#ifdef WOLFSSL_TRUST_PEER_CERT
WOLFSSL_API int wolfSSL_CertManagerUnload_trust_peers(
WOLFSSL_CERT_MANAGER* cm);

3
wolfssl/wolfcrypt/asn.h
View File

@ -2022,6 +2022,7 @@ struct Signer {
byte *sapkiDer;
int sapkiLen;
#endif /* WOLFSSL_DUAL_ALG_CERTS */
byte type;
Signer* next;
};
@ -2167,6 +2168,8 @@ WOLFSSL_LOCAL const byte* OidFromId(word32 id, word32 type, word32* oidSz);
WOLFSSL_LOCAL Signer* MakeSigner(void* heap);
WOLFSSL_LOCAL void FreeSigner(Signer* signer, void* heap);
WOLFSSL_LOCAL void FreeSignerTable(Signer** table, int rows, void* heap);
WOLFSSL_LOCAL void FreeSignerTableType(Signer** table, int rows, byte type,
void* heap);
#ifdef WOLFSSL_TRUST_PEER_CERT
WOLFSSL_LOCAL void FreeTrustedPeer(TrustedPeerCert* tp, void* heap);
WOLFSSL_LOCAL void FreeTrustedPeerTable(TrustedPeerCert** table, int rows,