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fix(esp_tee): Snapshot input arguments in TEE memory before secure service execution

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This commit is contained in:
Laukik Hase
2026-08-28 10:20:55 +05:30
parent 427dc875b9
commit 1fbeea3393
5 changed files with 317 additions and 219 deletions
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components/esp_security/src/esp_ds.c
+26 -16
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@@ -334,11 +334,12 @@ esp_err_t esp_ds_start_sign(const void *message,
return ESP_ERR_INVALID_ARG;
}
if (!(data->rsa_length == ESP_DS_RSA_1024
|| data->rsa_length == ESP_DS_RSA_2048
|| data->rsa_length == ESP_DS_RSA_3072
const uint32_t rsa_length = data->rsa_length;
if (!(rsa_length == ESP_DS_RSA_1024
|| rsa_length == ESP_DS_RSA_2048
|| rsa_length == ESP_DS_RSA_3072
#if SOC_RSA_MAX_BIT_LEN == 4096
|| data->rsa_length == ESP_DS_RSA_4096
|| rsa_length == ESP_DS_RSA_4096
#endif
)) {
return ESP_ERR_INVALID_ARG;
@@ -393,7 +394,7 @@ esp_err_t esp_ds_start_sign(const void *message,
return ESP_ERR_NO_MEM;
}
size_t rsa_len = (data->rsa_length + 1) * 4;
size_t rsa_len = (rsa_length + 1) * 4;
ds_hal_write_private_key_params(data->c);
ds_hal_configure_iv((uint32_t *)data->iv);
ds_hal_write_message(message, rsa_len);
@@ -426,22 +427,31 @@ esp_err_t esp_ds_finish_sign(void *signature, esp_ds_context_t *esp_ds_ctx)
}
const esp_ds_data_t *data = (const esp_ds_data_t *)esp_ds_ctx->data;
unsigned rsa_len = (data->rsa_length + 1) * 4;
esp_err_t return_value = ESP_ERR_INVALID_ARG;
while (ds_hal_busy()) { }
ds_signature_check_t sig_check_result = ds_hal_read_result((uint8_t *) signature, (size_t) rsa_len);
uint32_t rsa_length = data->rsa_length;
if (rsa_length == ESP_DS_RSA_1024
|| rsa_length == ESP_DS_RSA_2048
|| rsa_length == ESP_DS_RSA_3072
#if SOC_DS_SIGNATURE_MAX_BIT_LEN == 4096
|| rsa_length == ESP_DS_RSA_4096
#endif
) {
unsigned rsa_len = (rsa_length + 1) * 4;
esp_err_t return_value = ESP_OK;
ds_signature_check_t res = ds_hal_read_result((uint8_t *) signature, (size_t) rsa_len);
if (sig_check_result == DS_SIGNATURE_MD_FAIL || sig_check_result == DS_SIGNATURE_PADDING_AND_MD_FAIL) {
esp_ds_zeroize(signature, rsa_len);
return_value = ESP_ERR_HW_CRYPTO_DS_INVALID_DIGEST;
}
if (sig_check_result == DS_SIGNATURE_PADDING_FAIL) {
esp_ds_zeroize(signature, rsa_len);
return_value = ESP_ERR_HW_CRYPTO_DS_INVALID_PADDING;
if (res == DS_SIGNATURE_MD_FAIL || res == DS_SIGNATURE_PADDING_AND_MD_FAIL) {
esp_ds_zeroize(signature, rsa_len);
return_value = ESP_ERR_HW_CRYPTO_DS_INVALID_DIGEST;
} else if (res == DS_SIGNATURE_PADDING_FAIL) {
esp_ds_zeroize(signature, rsa_len);
return_value = ESP_ERR_HW_CRYPTO_DS_INVALID_PADDING;
} else if (res == DS_SIGNATURE_OK) {
return_value = ESP_OK;
}
}
#if !ESP_TEE_BUILD