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[Assignment-7] public_key: renamed to get_public_key; improved error handling

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This commit is contained in:
Sascha Tommasone 2024-07-02 23:15:10 +02:00
parent 5aad77ef33
commit cf82ac1794
Signed by: saschato
GPG key ID: 751068A86FCAA217
3 changed files with 14 additions and 11 deletions
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21
Assignment 7 - SGX Hands-on/src/enclave/enclave.c
View file

@ -127,24 +127,27 @@ sgx_status_t unseal_key_pair(const uint8_t *sealed, sgx_ec256_private_t *private
return status;
}
sgx_status_t public_key(const uint8_t *sealed, const size_t sealed_size, uint8_t *gx, uint8_t *gy) {
// return if no sealed data provided
if(sealed == NULL)
return SGX_ERROR_UNEXPECTED;
sgx_status_t get_public_key(const uint8_t *sealed, uint32_t sealed_size, uint8_t *gx, uint32_t gx_size, uint8_t *gy, uint32_t gy_size) {
// invalid parameter handling
if((sealed == NULL) || (sealed_size == 0)) {
return SGX_ERROR_INVALID_PARAMETER;
}
// unseal public key
sgx_status_t status;
sgx_ec256_public_t public;
if(unseal_key_pair(sealed, sealed_size, NULL, &public) != SGX_SUCCESS) {
return SGX_ERROR_UNEXPECTED;
if((status = unseal_key_pair(sealed, NULL, &public)) != SGX_SUCCESS) {
return status;
}
// copy public key into return buffers
if((gx != NULL) && (gy != NULL)) {
memcpy(gx, public.gx, SGX_ECP256_KEY_SIZE);
memcpy(gy, public.gy, SGX_ECP256_KEY_SIZE);
memcpy(gx, public.gx, SK_SIZE);
memcpy(gy, public.gy, SK_SIZE);
}
return SGX_SUCCESS;
// return success
return status;
}
sgx_status_t sign_firmware(const uint8_t *sealed, size_t sealed_size, uint8_t *data, size_t data_size, uint8_t *signature, size_t signature_size) {

2
Assignment 7 - SGX Hands-on/src/enclave/enclave.edl
View file

@ -44,7 +44,7 @@ enclave {
public int get_signature_size();
public int get_public_key_size();
public int get_private_key_size();
public sgx_status_t public_key([in, size=sealed_size]const uint8_t *sealed, size_t sealed_size, [out]uint8_t *gx, [out]uint8_t *gy);
public sgx_status_t get_public_key([in, size=sealed_size]const uint8_t *sealed, uint32_t sealed_size, [out, size=gx_size]uint8_t *gx, uint32_t gx_size, [out, size=gx_size]uint8_t *gy, uint32_t gy_size);
public sgx_status_t sign_firmware([in, size=data_size]const uint8_t *sealed, size_t sealed_size, [in, size=data_size]uint8_t *data, size_t data_size, [out, size=signature_size]uint8_t *signature, size_t signature_size);
};

2
Assignment 7 - SGX Hands-on/src/enclave/enclave.h
View file

@ -44,7 +44,7 @@ int get_signature_size();
int get_public_key_size();
int get_private_key_size();
sgx_status_t public_key(const uint8_t *sealed, const size_t sealed_size, uint8_t *gx, uint8_t *gy);
sgx_status_t get_public_key(const uint8_t *sealed, const uint32_t sealed_size, uint8_t *gx, uint32_t gx_size, uint8_t *gy, uint32_t gy_size);
sgx_status_t sign_firmware(const uint8_t *sealed, size_t sealed_size, uint8_t *data, size_t data_size, uint8_t *signature, size_t signature_size);
#endif /* !_ENCLAVE_H_ */