Provide and use internal function mbedtls_zeroize_and_free()
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/library/bignum_mod.c b/library/bignum_mod.c
index 84f3896..4d67829 100644
--- a/library/bignum_mod.c
+++ b/library/bignum_mod.c
@@ -80,9 +80,8 @@
switch (N->int_rep) {
case MBEDTLS_MPI_MOD_REP_MONTGOMERY:
if (N->rep.mont.rr != NULL) {
- mbedtls_platform_zeroize((mbedtls_mpi_uint *) N->rep.mont.rr,
+ mbedtls_zeroize_and_free((mbedtls_mpi_uint *) N->rep.mont.rr,
N->limbs * sizeof(mbedtls_mpi_uint));
- mbedtls_free((mbedtls_mpi_uint *) N->rep.mont.rr);
N->rep.mont.rr = NULL;
}
N->rep.mont.mm = 0;
@@ -295,9 +294,8 @@
break;
}
- mbedtls_platform_zeroize(working_memory,
+ mbedtls_zeroize_and_free(working_memory,
working_limbs * sizeof(mbedtls_mpi_uint));
- mbedtls_free(working_memory);
return ret;
}
@@ -399,8 +397,7 @@
if (N->int_rep == MBEDTLS_MPI_MOD_REP_MONTGOMERY &&
working_memory != NULL) {
- mbedtls_platform_zeroize(working_memory, working_memory_len);
- mbedtls_free(working_memory);
+ mbedtls_zeroize_and_free(working_memory, working_memory_len);
}
return ret;
diff --git a/library/bignum_mod_raw.c b/library/bignum_mod_raw.c
index bf72c18..eff5627 100644
--- a/library/bignum_mod_raw.c
+++ b/library/bignum_mod_raw.c
@@ -253,8 +253,7 @@
mbedtls_mpi_core_to_mont_rep(X, X, N->p, N->limbs,
N->rep.mont.mm, N->rep.mont.rr, T);
- mbedtls_platform_zeroize(T, t_limbs * ciL);
- mbedtls_free(T);
+ mbedtls_zeroize_and_free(T, t_limbs * ciL);
return 0;
}
@@ -270,8 +269,7 @@
mbedtls_mpi_core_from_mont_rep(X, X, N->p, N->limbs, N->rep.mont.mm, T);
- mbedtls_platform_zeroize(T, t_limbs * ciL);
- mbedtls_free(T);
+ mbedtls_zeroize_and_free(T, t_limbs * ciL);
return 0;
}
diff --git a/library/cipher.c b/library/cipher.c
index 490326a..de7f837 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -231,8 +231,7 @@
(void) psa_destroy_key(cipher_psa->slot);
}
- mbedtls_platform_zeroize(cipher_psa, sizeof(*cipher_psa));
- mbedtls_free(cipher_psa);
+ mbedtls_zeroize_and_free(cipher_psa, sizeof(*cipher_psa));
}
mbedtls_platform_zeroize(ctx, sizeof(mbedtls_cipher_context_t));
@@ -242,9 +241,8 @@
#if defined(MBEDTLS_CMAC_C)
if (ctx->cmac_ctx) {
- mbedtls_platform_zeroize(ctx->cmac_ctx,
+ mbedtls_zeroize_and_free(ctx->cmac_ctx,
sizeof(mbedtls_cmac_context_t));
- mbedtls_free(ctx->cmac_ctx);
}
#endif
diff --git a/library/common.h b/library/common.h
index 839b7d1..ce92238 100644
--- a/library/common.h
+++ b/library/common.h
@@ -114,6 +114,18 @@
*/
#define MBEDTLS_ALLOW_PRIVATE_ACCESS
+/**
+ * \brief Securely zeroize a buffer then free it.
+ *
+ * Exactly the same as consecutive calls to
+ * \c mbedtls_platform_zeroize() and \c mbedtls_free(), but has a
+ * code size savings, and potential for optimisation in the future.
+ *
+ * \param buf Buffer to be zeroized then freed. May be \c NULL.
+ * \param len Length of the buffer in bytes
+ */
+void mbedtls_zeroize_and_free(void *buf, size_t len);
+
/** Return an offset into a buffer.
*
* This is just the addition of an offset to a pointer, except that this
diff --git a/library/dhm.c b/library/dhm.c
index 94137a2..174137d 100644
--- a/library/dhm.c
+++ b/library/dhm.c
@@ -617,8 +617,7 @@
if (fread(*buf, 1, *n, f) != *n) {
fclose(f);
- mbedtls_platform_zeroize(*buf, *n + 1);
- mbedtls_free(*buf);
+ mbedtls_zeroize_and_free(*buf, *n + 1);
return MBEDTLS_ERR_DHM_FILE_IO_ERROR;
}
@@ -649,8 +648,7 @@
ret = mbedtls_dhm_parse_dhm(dhm, buf, n);
- mbedtls_platform_zeroize(buf, n);
- mbedtls_free(buf);
+ mbedtls_zeroize_and_free(buf, n);
return ret;
}
diff --git a/library/lms.c b/library/lms.c
index 4a42f67..c647730 100644
--- a/library/lms.c
+++ b/library/lms.c
@@ -537,9 +537,8 @@
ret = 0;
exit:
- mbedtls_platform_zeroize(tree, node_bytes *
+ mbedtls_zeroize_and_free(tree, node_bytes *
MERKLE_TREE_NODE_AM(ctx->params.type));
- mbedtls_free(tree);
return ret;
}
@@ -700,9 +699,8 @@
ret = 0;
exit:
- mbedtls_platform_zeroize(tree, node_bytes *
+ mbedtls_zeroize_and_free(tree, node_bytes *
MERKLE_TREE_NODE_AM(priv_ctx->params.type));
- mbedtls_free(tree);
return ret;
}
diff --git a/library/md.c b/library/md.c
index 964d4bd..8c0393b 100644
--- a/library/md.c
+++ b/library/md.c
@@ -346,9 +346,8 @@
#if defined(MBEDTLS_MD_C)
if (ctx->hmac_ctx != NULL) {
- mbedtls_platform_zeroize(ctx->hmac_ctx,
+ mbedtls_zeroize_and_free(ctx->hmac_ctx,
2 * ctx->md_info->block_size);
- mbedtls_free(ctx->hmac_ctx);
}
#endif
diff --git a/library/pem.c b/library/pem.c
index 056c98c..bd269dd 100644
--- a/library/pem.c
+++ b/library/pem.c
@@ -406,16 +406,14 @@
}
if ((ret = mbedtls_base64_decode(buf, len, &len, s1, s2 - s1)) != 0) {
- mbedtls_platform_zeroize(buf, len);
- mbedtls_free(buf);
+ mbedtls_zeroize_and_free(buf, len);
return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PEM_INVALID_DATA, ret);
}
if (enc != 0) {
#if defined(PEM_RFC1421)
if (pwd == NULL) {
- mbedtls_platform_zeroize(buf, len);
- mbedtls_free(buf);
+ mbedtls_zeroize_and_free(buf, len);
return MBEDTLS_ERR_PEM_PASSWORD_REQUIRED;
}
@@ -451,13 +449,11 @@
* Use that as a heuristic to try to detect password mismatches.
*/
if (len <= 2 || buf[0] != 0x30 || buf[1] > 0x83) {
- mbedtls_platform_zeroize(buf, len);
- mbedtls_free(buf);
+ mbedtls_zeroize_and_free(buf, len);
return MBEDTLS_ERR_PEM_PASSWORD_MISMATCH;
}
#else
- mbedtls_platform_zeroize(buf, len);
- mbedtls_free(buf);
+ mbedtls_zeroize_and_free(buf, len);
return MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE;
#endif /* PEM_RFC1421 */
}
@@ -471,8 +467,7 @@
void mbedtls_pem_free(mbedtls_pem_context *ctx)
{
if (ctx->buf != NULL) {
- mbedtls_platform_zeroize(ctx->buf, ctx->buflen);
- mbedtls_free(ctx->buf);
+ mbedtls_zeroize_and_free(ctx->buf, ctx->buflen);
}
mbedtls_free(ctx->info);
diff --git a/library/pk_wrap.c b/library/pk_wrap.c
index 3fe2c3e..a4dc655 100644
--- a/library/pk_wrap.c
+++ b/library/pk_wrap.c
@@ -1637,8 +1637,7 @@
static void rsa_alt_free_wrap(void *ctx)
{
- mbedtls_platform_zeroize(ctx, sizeof(mbedtls_rsa_alt_context));
- mbedtls_free(ctx);
+ mbedtls_zeroize_and_free(ctx, sizeof(mbedtls_rsa_alt_context));
}
const mbedtls_pk_info_t mbedtls_rsa_alt_info = {
diff --git a/library/pkparse.c b/library/pkparse.c
index fa0570c..f03ace2 100644
--- a/library/pkparse.c
+++ b/library/pkparse.c
@@ -107,8 +107,7 @@
if (fread(*buf, 1, *n, f) != *n) {
fclose(f);
- mbedtls_platform_zeroize(*buf, *n);
- mbedtls_free(*buf);
+ mbedtls_zeroize_and_free(*buf, *n);
return MBEDTLS_ERR_PK_FILE_IO_ERROR;
}
@@ -146,8 +145,7 @@
(const unsigned char *) pwd, strlen(pwd), f_rng, p_rng);
}
- mbedtls_platform_zeroize(buf, n);
- mbedtls_free(buf);
+ mbedtls_zeroize_and_free(buf, n);
return ret;
}
@@ -167,8 +165,7 @@
ret = mbedtls_pk_parse_public_key(ctx, buf, n);
- mbedtls_platform_zeroize(buf, n);
- mbedtls_free(buf);
+ mbedtls_zeroize_and_free(buf, n);
return ret;
}
@@ -1686,8 +1683,7 @@
ret = pk_parse_key_pkcs8_encrypted_der(pk, key_copy, keylen,
pwd, pwdlen, f_rng, p_rng);
- mbedtls_platform_zeroize(key_copy, keylen);
- mbedtls_free(key_copy);
+ mbedtls_zeroize_and_free(key_copy, keylen);
}
if (ret == 0) {
diff --git a/library/platform_util.c b/library/platform_util.c
index c67b80d..4a9a749 100644
--- a/library/platform_util.c
+++ b/library/platform_util.c
@@ -129,6 +129,15 @@
}
#endif /* MBEDTLS_PLATFORM_ZEROIZE_ALT */
+void mbedtls_zeroize_and_free(void *buf, size_t len)
+{
+ if (buf != NULL) {
+ mbedtls_platform_zeroize(buf, len);
+ }
+
+ mbedtls_free(buf);
+}
+
#if defined(MBEDTLS_HAVE_TIME_DATE) && !defined(MBEDTLS_PLATFORM_GMTIME_R_ALT)
#include <time.h>
#if !defined(_WIN32) && (defined(unix) || \
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index a2a6755..df7057b 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -5148,27 +5148,23 @@
/* TLS-1.2 PSK-to-MS KDF uses the same core as TLS-1.2 PRF */
PSA_ALG_IS_TLS12_PSK_TO_MS(kdf_alg)) {
if (operation->ctx.tls12_prf.secret != NULL) {
- mbedtls_platform_zeroize(operation->ctx.tls12_prf.secret,
+ mbedtls_zeroize_and_free(operation->ctx.tls12_prf.secret,
operation->ctx.tls12_prf.secret_length);
- mbedtls_free(operation->ctx.tls12_prf.secret);
}
if (operation->ctx.tls12_prf.seed != NULL) {
- mbedtls_platform_zeroize(operation->ctx.tls12_prf.seed,
+ mbedtls_zeroize_and_free(operation->ctx.tls12_prf.seed,
operation->ctx.tls12_prf.seed_length);
- mbedtls_free(operation->ctx.tls12_prf.seed);
}
if (operation->ctx.tls12_prf.label != NULL) {
- mbedtls_platform_zeroize(operation->ctx.tls12_prf.label,
+ mbedtls_zeroize_and_free(operation->ctx.tls12_prf.label,
operation->ctx.tls12_prf.label_length);
- mbedtls_free(operation->ctx.tls12_prf.label);
}
#if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS)
if (operation->ctx.tls12_prf.other_secret != NULL) {
- mbedtls_platform_zeroize(operation->ctx.tls12_prf.other_secret,
+ mbedtls_zeroize_and_free(operation->ctx.tls12_prf.other_secret,
operation->ctx.tls12_prf.other_secret_length);
- mbedtls_free(operation->ctx.tls12_prf.other_secret);
}
#endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS */
status = PSA_SUCCESS;
@@ -5187,9 +5183,8 @@
#if defined(MBEDTLS_PSA_BUILTIN_ALG_PBKDF2_HMAC)
if (PSA_ALG_IS_PBKDF2_HMAC(kdf_alg)) {
if (operation->ctx.pbkdf2.salt != NULL) {
- mbedtls_platform_zeroize(operation->ctx.pbkdf2.salt,
+ mbedtls_zeroize_and_free(operation->ctx.pbkdf2.salt,
operation->ctx.pbkdf2.salt_length);
- mbedtls_free(operation->ctx.pbkdf2.salt);
}
status = PSA_SUCCESS;
@@ -6549,8 +6544,7 @@
status = psa_tls12_prf_set_key(prf, pms, cur - pms);
- mbedtls_platform_zeroize(pms, pms_len);
- mbedtls_free(pms);
+ mbedtls_zeroize_and_free(pms, pms_len);
return status;
}
@@ -7988,8 +7982,7 @@
status = psa_driver_wrapper_pake_setup(operation, &inputs);
/* Driver is responsible for creating its own copy of the password. */
- mbedtls_platform_zeroize(inputs.password, inputs.password_len);
- mbedtls_free(inputs.password);
+ mbedtls_zeroize_and_free(inputs.password, inputs.password_len);
/* User and peer are translated to role. */
mbedtls_free(inputs.user);
@@ -8290,9 +8283,8 @@
if (operation->stage == PSA_PAKE_OPERATION_STAGE_COLLECT_INPUTS) {
if (operation->data.inputs.password != NULL) {
- mbedtls_platform_zeroize(operation->data.inputs.password,
+ mbedtls_zeroize_and_free(operation->data.inputs.password,
operation->data.inputs.password_len);
- mbedtls_free(operation->data.inputs.password);
}
if (operation->data.inputs.user != NULL) {
mbedtls_free(operation->data.inputs.user);
diff --git a/library/psa_crypto_pake.c b/library/psa_crypto_pake.c
index c2e7dba..caba5a1 100644
--- a/library/psa_crypto_pake.c
+++ b/library/psa_crypto_pake.c
@@ -559,8 +559,7 @@
psa_status_t mbedtls_psa_pake_abort(mbedtls_psa_pake_operation_t *operation)
{
- mbedtls_platform_zeroize(operation->password, operation->password_len);
- mbedtls_free(operation->password);
+ mbedtls_zeroize_and_free(operation->password, operation->password_len);
operation->password = NULL;
operation->password_len = 0;
diff --git a/library/psa_crypto_storage.c b/library/psa_crypto_storage.c
index a8ed937..574d4b0 100644
--- a/library/psa_crypto_storage.c
+++ b/library/psa_crypto_storage.c
@@ -354,18 +354,14 @@
status = psa_crypto_storage_store(attr->id,
storage_data, storage_data_length);
- mbedtls_platform_zeroize(storage_data, storage_data_length);
- mbedtls_free(storage_data);
+ mbedtls_zeroize_and_free(storage_data, storage_data_length);
return status;
}
void psa_free_persistent_key_data(uint8_t *key_data, size_t key_data_length)
{
- if (key_data != NULL) {
- mbedtls_platform_zeroize(key_data, key_data_length);
- }
- mbedtls_free(key_data);
+ mbedtls_zeroize_and_free(key_data, key_data_length);
}
psa_status_t psa_load_persistent_key(psa_core_key_attributes_t *attr,
@@ -403,8 +399,7 @@
}
exit:
- mbedtls_platform_zeroize(loaded_data, storage_data_length);
- mbedtls_free(loaded_data);
+ mbedtls_zeroize_and_free(loaded_data, storage_data_length);
return status;
}
diff --git a/library/rsa.c b/library/rsa.c
index 8126ae9..970a56b 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -1905,10 +1905,8 @@
memcpy(sig, sig_try, ctx->len);
cleanup:
- mbedtls_platform_zeroize(sig_try, ctx->len);
- mbedtls_platform_zeroize(verif, ctx->len);
- mbedtls_free(sig_try);
- mbedtls_free(verif);
+ mbedtls_zeroize_and_free(sig_try, ctx->len);
+ mbedtls_zeroize_and_free(verif, ctx->len);
if (ret != 0) {
memset(sig, '!', ctx->len);
@@ -2152,13 +2150,11 @@
cleanup:
if (encoded != NULL) {
- mbedtls_platform_zeroize(encoded, sig_len);
- mbedtls_free(encoded);
+ mbedtls_zeroize_and_free(encoded, sig_len);
}
if (encoded_expected != NULL) {
- mbedtls_platform_zeroize(encoded_expected, sig_len);
- mbedtls_free(encoded_expected);
+ mbedtls_zeroize_and_free(encoded_expected, sig_len);
}
return ret;
diff --git a/library/ssl_cache.c b/library/ssl_cache.c
index e29b0bc..1c285ec 100644
--- a/library/ssl_cache.c
+++ b/library/ssl_cache.c
@@ -131,8 +131,7 @@
/* zeroize and free session structure */
if (entry->session != NULL) {
- mbedtls_platform_zeroize(entry->session, entry->session_len);
- mbedtls_free(entry->session);
+ mbedtls_zeroize_and_free(entry->session, entry->session_len);
}
/* zeroize the whole entry structure */
@@ -324,8 +323,7 @@
#endif
if (session_serialized != NULL) {
- mbedtls_platform_zeroize(session_serialized, session_serialized_len);
- mbedtls_free(session_serialized);
+ mbedtls_zeroize_and_free(session_serialized, session_serialized_len);
session_serialized = NULL;
}
diff --git a/library/ssl_msg.c b/library/ssl_msg.c
index 2aba17b..1a314a8 100644
--- a/library/ssl_msg.c
+++ b/library/ssl_msg.c
@@ -5829,8 +5829,7 @@
if (hs_buf->is_valid == 1) {
hs->buffering.total_bytes_buffered -= hs_buf->data_len;
- mbedtls_platform_zeroize(hs_buf->data, hs_buf->data_len);
- mbedtls_free(hs_buf->data);
+ mbedtls_zeroize_and_free(hs_buf->data, hs_buf->data_len);
memset(hs_buf, 0, sizeof(mbedtls_ssl_hs_buffer));
}
}
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index d18b80a..24a103f 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -327,8 +327,7 @@
* lost, are done outside of this function. */
memcpy(resized_buffer, *buffer,
(len_new < *len_old) ? len_new : *len_old);
- mbedtls_platform_zeroize(*buffer, *len_old);
- mbedtls_free(*buffer);
+ mbedtls_zeroize_and_free(*buffer, *len_old);
*buffer = resized_buffer;
*len_old = len_new;
@@ -2123,9 +2122,7 @@
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
if (conf->psk != NULL) {
- mbedtls_platform_zeroize(conf->psk, conf->psk_len);
-
- mbedtls_free(conf->psk);
+ mbedtls_zeroize_and_free(conf->psk, conf->psk_len);
conf->psk = NULL;
conf->psk_len = 0;
}
@@ -2217,9 +2214,8 @@
}
#else
if (ssl->handshake->psk != NULL) {
- mbedtls_platform_zeroize(ssl->handshake->psk,
+ mbedtls_zeroize_and_free(ssl->handshake->psk,
ssl->handshake->psk_len);
- mbedtls_free(ssl->handshake->psk);
ssl->handshake->psk_len = 0;
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
@@ -2975,8 +2971,7 @@
* so we can free it safely */
if (ssl->hostname != NULL) {
- mbedtls_platform_zeroize(ssl->hostname, strlen(ssl->hostname));
- mbedtls_free(ssl->hostname);
+ mbedtls_zeroize_and_free(ssl->hostname, strlen(ssl->hostname));
}
/* Passing NULL as hostname shall clear the old one */
@@ -4177,8 +4172,7 @@
}
#else
if (handshake->psk != NULL) {
- mbedtls_platform_zeroize(handshake->psk, handshake->psk_len);
- mbedtls_free(handshake->psk);
+ mbedtls_zeroize_and_free(handshake->psk, handshake->psk_len);
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
#endif /* MBEDTLS_SSL_HANDSHAKE_WITH_PSK_ENABLED */
@@ -4851,8 +4845,7 @@
size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
#endif
- mbedtls_platform_zeroize(ssl->out_buf, out_buf_len);
- mbedtls_free(ssl->out_buf);
+ mbedtls_zeroize_and_free(ssl->out_buf, out_buf_len);
ssl->out_buf = NULL;
}
@@ -4863,8 +4856,7 @@
size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN;
#endif
- mbedtls_platform_zeroize(ssl->in_buf, in_buf_len);
- mbedtls_free(ssl->in_buf);
+ mbedtls_zeroize_and_free(ssl->in_buf, in_buf_len);
ssl->in_buf = NULL;
}
@@ -4898,8 +4890,7 @@
#if defined(MBEDTLS_X509_CRT_PARSE_C)
if (ssl->hostname != NULL) {
- mbedtls_platform_zeroize(ssl->hostname, strlen(ssl->hostname));
- mbedtls_free(ssl->hostname);
+ mbedtls_zeroize_and_free(ssl->hostname, strlen(ssl->hostname));
}
#endif
@@ -5382,15 +5373,13 @@
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
if (conf->psk != NULL) {
- mbedtls_platform_zeroize(conf->psk, conf->psk_len);
- mbedtls_free(conf->psk);
+ mbedtls_zeroize_and_free(conf->psk, conf->psk_len);
conf->psk = NULL;
conf->psk_len = 0;
}
if (conf->psk_identity != NULL) {
- mbedtls_platform_zeroize(conf->psk_identity, conf->psk_identity_len);
- mbedtls_free(conf->psk_identity);
+ mbedtls_zeroize_and_free(conf->psk_identity, conf->psk_identity_len);
conf->psk_identity = NULL;
conf->psk_identity_len = 0;
}
@@ -9549,9 +9538,8 @@
/* Now it's clear that we will overwrite the old hostname,
* so we can free it safely */
if (session->hostname != NULL) {
- mbedtls_platform_zeroize(session->hostname,
+ mbedtls_zeroize_and_free(session->hostname,
strlen(session->hostname));
- mbedtls_free(session->hostname);
}
/* Passing NULL as hostname shall clear the old one */
diff --git a/library/ssl_tls12_client.c b/library/ssl_tls12_client.c
index 4d8442e..5a98165 100644
--- a/library/ssl_tls12_client.c
+++ b/library/ssl_tls12_client.c
@@ -3459,16 +3459,14 @@
}
if (ssl->session != NULL && ssl->session->ticket != NULL) {
- mbedtls_platform_zeroize(ssl->session->ticket,
+ mbedtls_zeroize_and_free(ssl->session->ticket,
ssl->session->ticket_len);
- mbedtls_free(ssl->session->ticket);
ssl->session->ticket = NULL;
ssl->session->ticket_len = 0;
}
- mbedtls_platform_zeroize(ssl->session_negotiate->ticket,
+ mbedtls_zeroize_and_free(ssl->session_negotiate->ticket,
ssl->session_negotiate->ticket_len);
- mbedtls_free(ssl->session_negotiate->ticket);
ssl->session_negotiate->ticket = NULL;
ssl->session_negotiate->ticket_len = 0;
diff --git a/library/ssl_tls13_keys.c b/library/ssl_tls13_keys.c
index 18997e9..afd84a9 100644
--- a/library/ssl_tls13_keys.c
+++ b/library/ssl_tls13_keys.c
@@ -1559,8 +1559,7 @@
cleanup:
if (shared_secret != NULL) {
- mbedtls_platform_zeroize(shared_secret, shared_secret_len);
- mbedtls_free(shared_secret);
+ mbedtls_zeroize_and_free(shared_secret, shared_secret_len);
}
return ret;
diff --git a/library/x509_crl.c b/library/x509_crl.c
index f644203..79ace8f 100644
--- a/library/x509_crl.c
+++ b/library/x509_crl.c
@@ -587,8 +587,7 @@
ret = mbedtls_x509_crl_parse(chain, buf, n);
- mbedtls_platform_zeroize(buf, n);
- mbedtls_free(buf);
+ mbedtls_zeroize_and_free(buf, n);
return ret;
}
@@ -704,14 +703,12 @@
while (entry_cur != NULL) {
entry_prv = entry_cur;
entry_cur = entry_cur->next;
- mbedtls_platform_zeroize(entry_prv,
+ mbedtls_zeroize_and_free(entry_prv,
sizeof(mbedtls_x509_crl_entry));
- mbedtls_free(entry_prv);
}
if (crl_cur->raw.p != NULL) {
- mbedtls_platform_zeroize(crl_cur->raw.p, crl_cur->raw.len);
- mbedtls_free(crl_cur->raw.p);
+ mbedtls_zeroize_and_free(crl_cur->raw.p, crl_cur->raw.len);
}
crl_prv = crl_cur;
diff --git a/library/x509_crt.c b/library/x509_crt.c
index 30e9668..b40bad2 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -1526,8 +1526,7 @@
ret = mbedtls_x509_crt_parse(chain, buf, n);
- mbedtls_platform_zeroize(buf, n);
- mbedtls_free(buf);
+ mbedtls_zeroize_and_free(buf, n);
return ret;
}
@@ -3258,8 +3257,7 @@
mbedtls_asn1_sequence_free(cert_cur->authority_key_id.authorityCertIssuer.next);
if (cert_cur->raw.p != NULL && cert_cur->own_buffer) {
- mbedtls_platform_zeroize(cert_cur->raw.p, cert_cur->raw.len);
- mbedtls_free(cert_cur->raw.p);
+ mbedtls_zeroize_and_free(cert_cur->raw.p, cert_cur->raw.len);
}
cert_prv = cert_cur;
diff --git a/library/x509_csr.c b/library/x509_csr.c
index cd117cb..0b2bb6f 100644
--- a/library/x509_csr.c
+++ b/library/x509_csr.c
@@ -460,8 +460,7 @@
ret = mbedtls_x509_csr_parse(csr, buf, n);
- mbedtls_platform_zeroize(buf, n);
- mbedtls_free(buf);
+ mbedtls_zeroize_and_free(buf, n);
return ret;
}
@@ -578,8 +577,7 @@
mbedtls_asn1_sequence_free(csr->subject_alt_names.next);
if (csr->raw.p != NULL) {
- mbedtls_platform_zeroize(csr->raw.p, csr->raw.len);
- mbedtls_free(csr->raw.p);
+ mbedtls_zeroize_and_free(csr->raw.p, csr->raw.len);
}
mbedtls_platform_zeroize(csr, sizeof(mbedtls_x509_csr));