Function add_header_signature

commit.c:1160–1189

};

int add_header_signature(struct strbuf *buf, struct strbuf *sig, const struct git_hash_algo *algo)
{
	int inspos, copypos;
	const char *eoh;
	const char *gpg_sig_header = gpg_sig_headers[hash_algo_by_ptr(algo)];
	int gpg_sig_header_len = strlen(gpg_sig_header);

	/* find the end of the header */
	eoh = strstr(buf->buf, "\n\n");
	if (!eoh)
		inspos = buf->len;
	else
		inspos = eoh - buf->buf + 1;

	for (copypos = 0; sig->buf[copypos]; ) {
		const char *bol = sig->buf + copypos;
		const char *eol = strchrnul(bol, '\n');
		int len = (eol - bol) + !!*eol;

		if (!copypos) {
			strbuf_insert(buf, inspos, gpg_sig_header, gpg_sig_header_len);
			inspos += gpg_sig_header_len;
		}
		strbuf_insertstr(buf, inspos++, " ");
		strbuf_insert(buf, inspos, bol, len);
		inspos += len;
		copypos += len;
	}
	return 0;
}

int parse_signed_commit(const struct commit *commit,
			struct strbuf *payload, struct strbuf *signature,