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fix for OWE memory leak

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This commit is contained in:
Shyamal Khachane
2022-07-15 13:07:21 +05:30
parent c65d818c1d
commit 88db86672d
4 changed files with 38 additions and 11 deletions
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16
components/wpa_supplicant/esp_supplicant/src/crypto/crypto_mbedtls-ec.c
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@@ -1047,12 +1047,14 @@ struct crypto_ecdh * crypto_ecdh_init(int group)
mbedtls_ecdh_context *ctx;
ctx = os_zalloc(sizeof(*ctx));
if (!ctx) {
wpa_printf(MSG_ERROR, "Memory allocation failed for ecdh context");
goto fail;
}
mbedtls_ecdh_init(ctx);
#ifndef CONFIG_MBEDTLS_ECDH_LEGACY_CONTEXT
ctx->var = MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0;
#endif
if ((mbedtls_ecp_group_load(ACCESS_ECDH(&ctx, grp), crypto_mbedtls_get_grp_id(group))) != 0) {
wpa_printf(MSG_ERROR, "Failed to set up ECDH context with group info");
@@ -1074,8 +1076,18 @@ struct crypto_ecdh * crypto_ecdh_init(int group)
wpa_printf(MSG_ERROR, "ECDH keypair on curve failed");
goto fail;
}
mbedtls_ctr_drbg_free(&ctr_drbg);
mbedtls_entropy_free(&entropy);
return (struct crypto_ecdh *)ctx;
fail:
if (ctx) {
mbedtls_ecdh_free(ctx);
os_free(ctx);
ctx = NULL;
}
mbedtls_ctr_drbg_free(&ctr_drbg);
mbedtls_entropy_free(&entropy);
return NULL;
}
@@ -1199,6 +1211,8 @@ cleanup:
crypto_ec_free_key(pkey);
crypto_bignum_deinit(bn_x, 1);
crypto_ec_point_deinit(ec_pt, 1);
mbedtls_ctr_drbg_free(&ctr_drbg);
mbedtls_entropy_free(&entropy);
return sh_secret;
}