mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 18:11:28 +01:00
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
#ifndef LIGHTNING_COMMON_HSM_ENCRYPTION_H
|
|
#define LIGHTNING_COMMON_HSM_ENCRYPTION_H
|
|
#include "config.h"
|
|
#include <bitcoin/privkey.h>
|
|
#include <ccan/tal/tal.h>
|
|
#include <sodium.h>
|
|
|
|
/* Length of the encrypted hsm secret header. */
|
|
#define HS_HEADER_LEN crypto_secretstream_xchacha20poly1305_HEADERBYTES
|
|
/* From libsodium: "The ciphertext length is guaranteed to always be message
|
|
* length + ABYTES" */
|
|
#define HS_CIPHERTEXT_LEN \
|
|
(sizeof(struct secret) + crypto_secretstream_xchacha20poly1305_ABYTES)
|
|
/* Total length of an encrypted hsm_secret */
|
|
#define ENCRYPTED_HSM_SECRET_LEN (HS_HEADER_LEN + HS_CIPHERTEXT_LEN)
|
|
|
|
struct encrypted_hsm_secret {
|
|
u8 data[ENCRYPTED_HSM_SECRET_LEN];
|
|
};
|
|
|
|
/** Derive the hsm_secret encryption key from a passphrase.
|
|
* @pass: the passphrase string.
|
|
* @encryption_key: the output key derived from the passphrase.
|
|
*
|
|
* On success, NULL is returned. On error, a human-readable error is.
|
|
*/
|
|
char *hsm_secret_encryption_key(const char *pass, struct secret *encryption_key);
|
|
|
|
/** Encrypt the hsm_secret using a previously derived encryption key.
|
|
* @encryption_key: the key derived from the passphrase.
|
|
* @hsm_secret: the plaintext hsm_secret to encrypt.
|
|
* @output: the resulting encrypted hsm_secret.
|
|
*
|
|
* Return false on encryption failure.
|
|
*/
|
|
bool encrypt_hsm_secret(const struct secret *encryption_key,
|
|
const struct secret *hsm_secret,
|
|
struct encrypted_hsm_secret *output);
|
|
|
|
/** Decrypt the hsm_secret using a previously derived encryption key.
|
|
* @encryption_key: the key derived from the passphrase.
|
|
* @cipher: the encrypted hsm_secret to decrypt.
|
|
* @output: the resulting hsm_secret.
|
|
*
|
|
* Return false on decryption failure.
|
|
*/
|
|
bool decrypt_hsm_secret(const struct secret *encryption_key,
|
|
const struct encrypted_hsm_secret *cipher,
|
|
struct secret *output);
|
|
|
|
/** Unlock and zeroize the encryption key memory after use.
|
|
* @key: the encryption key. If taken, it will be tal_free'd
|
|
*/
|
|
void discard_key(struct secret *key TAKES);
|
|
|
|
/** Read hsm_secret encryption pass from stdin, disabling echoing.
|
|
* @reason: if NULL is returned, will point to the human-readable error.
|
|
*
|
|
* Caller must free the string as it does tal-reallocate getline's output.
|
|
*/
|
|
char *read_stdin_pass(char **reason);
|
|
|
|
#endif /* LIGHTNING_COMMON_HSM_ENCRYPTION_H */
|