1#ifndef GPG_INTERFACE_H2#define GPG_INTERFACE_H34extern int sign_buffer(struct strbuf *buffer, struct strbuf *signature, const char *signing_key);5extern int verify_signed_buffer(const char *payload, size_t payload_size, const char *signature, size_t signature_size, struct strbuf *gpg_output);6extern int git_gpg_config(const char *, const char *, void *);7extern void set_signing_key(const char *);8extern const char *get_signing_key(void);910#endif