git/gpg-interface.h

#ifndef GPG_INTERFACE_H
#define GPG_INTERFACE_H

extern int sign_buffer(struct strbuf *buffer, struct strbuf *signature, const char *signing_key);
extern int verify_signed_buffer(const char *payload, size_t payload_size, const char *signature, size_t signature_size, struct strbuf *gpg_output);
extern int git_gpg_config(const char *, const char *, void *);
extern void set_signing_key(const char *);
extern const char *get_signing_key(void);

#endif
Split GPG interface into its own helper library This mostly moves existing code from builtin/tag.c (for signing) and builtin/verify-tag.c (for verifying) to a new gpg-interface.c file to provide a more generic library interface. - sign_buffer() takes a payload strbuf, a signature strbuf, and a signing key, runs "gpg" to produce a detached signature for the payload, and appends it to the signature strbuf. The contents of a signed tag that concatenates the payload and the detached signature can be produced by giving the same strbuf as payload and signature strbuf. - verify_signed_buffer() takes a payload and a detached signature as <ptr, len> pairs, and runs "gpg --verify" to see if the payload matches the signature. It can optionally capture the output from GPG to allow the callers to pretty-print it in a way more suitable for their contexts. "verify-tag" (aka "tag -v") used to save the whole tag contents as if it is a detached signature, and fed gpg the payload part of the tag. It relied on gpg to fail when the given tag is not signed but just is annotated. The updated run_gpg_verify() function detects the lack of detached signature in the input, and errors out without bothering "gpg". Signed-off-by: Junio C Hamano <gitster@pobox.com> 2011-09-08 08:19:47 +04:00			`#ifndef GPG_INTERFACE_H`
			`#define GPG_INTERFACE_H`

			`extern int sign_buffer(struct strbuf buffer, struct strbuf signature, const char *signing_key);`
			`extern int verify_signed_buffer(const char payload, size_t payload_size, const char signature, size_t signature_size, struct strbuf *gpg_output);`
			`extern int git_gpg_config(const char , const char , void *);`
			`extern void set_signing_key(const char *);`
			`extern const char *get_signing_key(void);`

			`#endif`