Function parse_buffer_signed_by_header

commit.c:1204–1247

}

int parse_buffer_signed_by_header(const char *buffer,
				  unsigned long size,
				  struct strbuf *payload,
				  struct strbuf *signature,
				  const struct git_hash_algo *algop)
{
	int in_signature = 0, saw_signature = 0, other_signature = 0;
	const char *line, *tail, *p;
	const char *gpg_sig_header = gpg_sig_headers[hash_algo_by_ptr(algop)];

	line = buffer;
	tail = buffer + size;
	while (line < tail) {
		const char *sig = NULL;
		const char *next = memchr(line, '\n', tail - line);

		next = next ? next + 1 : tail;
		if (in_signature && line[0] == ' ')
			sig = line + 1;
		else if (skip_prefix(line, gpg_sig_header, &p) &&
			 *p == ' ') {
			sig = line + strlen(gpg_sig_header) + 1;
			other_signature = 0;
		}
		else if (starts_with(line, "gpgsig"))
			other_signature = 1;
		else if (other_signature && line[0] != ' ')
			other_signature = 0;
		if (sig) {
			strbuf_add(signature, sig, next - sig);
			saw_signature = 1;
			in_signature = 1;
		} else {
			if (*line == '\n')
				/* dump the whole remainder of the buffer */
				next = tail;
			if (!other_signature)
				strbuf_add(payload, line, next - line);
			in_signature = 0;
		}
		line = next;
	}
	return saw_signature;
}

int remove_signature(struct strbuf *buf)
{