a_strex.c

开源的ssl算法openssl,版本0.9.8H

	-1, -1, -1, -1, -1,	/* 0-4 */
	-1, -1, -1, -1, -1,	/* 5-9 */
	-1, -1, 0, -1,		/* 10-13 */
	-1, -1, -1, -1,		/* 15-17 */
	-1, 1, 1,		/* 18-20 */
	-1, 1, 1, 1,		/* 21-24 */
	-1, 1, -1,		/* 25-27 */
	4, -1, 2		/* 28-30 */
};

#define ESC_FLAGS (ASN1_STRFLGS_ESC_2253 | \
		  ASN1_STRFLGS_ESC_QUOTE | \
		  ASN1_STRFLGS_ESC_CTRL | \
		  ASN1_STRFLGS_ESC_MSB)

/* This is the main function, print out an
 * ASN1_STRING taking note of various escape
 * and display options. Returns number of
 * characters written or -1 if an error
 * occurred.
 */

static int do_print_ex(char_io *io_ch, void *arg, unsigned long lflags, ASN1_STRING *str)
{
	int outlen, len;
	int type;
	char quotes;
	unsigned char flags;
	quotes = 0;
	/* Keep a copy of escape flags */
	flags = (unsigned char)(lflags & ESC_FLAGS);

	type = str->type;

	outlen = 0;


	if(lflags & ASN1_STRFLGS_SHOW_TYPE) {
		const char *tagname;
		tagname = ASN1_tag2str(type);
		outlen += strlen(tagname);
		if(!io_ch(arg, tagname, outlen) || !io_ch(arg, ":", 1)) return -1; 
		outlen++;
	}

	/* Decide what to do with type, either dump content or display it */

	/* Dump everything */
	if(lflags & ASN1_STRFLGS_DUMP_ALL) type = -1;
	/* Ignore the string type */
	else if(lflags & ASN1_STRFLGS_IGNORE_TYPE) type = 1;
	else {
		/* Else determine width based on type */
		if((type > 0) && (type < 31)) type = tag2nbyte[type];
		else type = -1;
		if((type == -1) && !(lflags & ASN1_STRFLGS_DUMP_UNKNOWN)) type = 1;
	}

	if(type == -1) {
		len = do_dump(lflags, io_ch, arg, str);
		if(len < 0) return -1;
		outlen += len;
		return outlen;
	}

	if(lflags & ASN1_STRFLGS_UTF8_CONVERT) {
		/* Note: if string is UTF8 and we want
		 * to convert to UTF8 then we just interpret
		 * it as 1 byte per character to avoid converting
		 * twice.
		 */
		if(!type) type = 1;
		else type |= BUF_TYPE_CONVUTF8;
	}

	len = do_buf(str->data, str->length, type, flags, &quotes, io_ch, NULL);
	if(len < 0) return -1;
	outlen += len;
	if(quotes) outlen += 2;
	if(!arg) return outlen;
	if(quotes && !io_ch(arg, "\"", 1)) return -1;
	if(do_buf(str->data, str->length, type, flags, NULL, io_ch, arg) < 0)
		return -1;
	if(quotes && !io_ch(arg, "\"", 1)) return -1;
	return outlen;
}

/* Used for line indenting: print 'indent' spaces */

static int do_indent(char_io *io_ch, void *arg, int indent)
{
	int i;
	for(i = 0; i < indent; i++)
			if(!io_ch(arg, " ", 1)) return 0;
	return 1;
}

#define FN_WIDTH_LN	25
#define FN_WIDTH_SN	10

static int do_name_ex(char_io *io_ch, void *arg, X509_NAME *n,
				int indent, unsigned long flags)
{
	int i, prev = -1, orflags, cnt;
	int fn_opt, fn_nid;
	ASN1_OBJECT *fn;
	ASN1_STRING *val;
	X509_NAME_ENTRY *ent;
	char objtmp[80];
	const char *objbuf;
	int outlen, len;
	char *sep_dn, *sep_mv, *sep_eq;
	int sep_dn_len, sep_mv_len, sep_eq_len;
	if(indent < 0) indent = 0;
	outlen = indent;
	if(!do_indent(io_ch, arg, indent)) return -1;
	switch (flags & XN_FLAG_SEP_MASK)
	{
		case XN_FLAG_SEP_MULTILINE:
		sep_dn = "\n";
		sep_dn_len = 1;
		sep_mv = " + ";
		sep_mv_len = 3;
		break;

		case XN_FLAG_SEP_COMMA_PLUS:
		sep_dn = ",";
		sep_dn_len = 1;
		sep_mv = "+";
		sep_mv_len = 1;
		indent = 0;
		break;

		case XN_FLAG_SEP_CPLUS_SPC:
		sep_dn = ", ";
		sep_dn_len = 2;
		sep_mv = " + ";
		sep_mv_len = 3;
		indent = 0;
		break;

		case XN_FLAG_SEP_SPLUS_SPC:
		sep_dn = "; ";
		sep_dn_len = 2;
		sep_mv = " + ";
		sep_mv_len = 3;
		indent = 0;
		break;

		default:
		return -1;
	}

	if(flags & XN_FLAG_SPC_EQ) {
		sep_eq = " = ";
		sep_eq_len = 3;
	} else {
		sep_eq = "=";
		sep_eq_len = 1;
	}

	fn_opt = flags & XN_FLAG_FN_MASK;

	cnt = X509_NAME_entry_count(n);	
	for(i = 0; i < cnt; i++) {
		if(flags & XN_FLAG_DN_REV)
				ent = X509_NAME_get_entry(n, cnt - i - 1);
		else ent = X509_NAME_get_entry(n, i);
		if(prev != -1) {
			if(prev == ent->set) {
				if(!io_ch(arg, sep_mv, sep_mv_len)) return -1;
				outlen += sep_mv_len;
			} else {
				if(!io_ch(arg, sep_dn, sep_dn_len)) return -1;
				outlen += sep_dn_len;
				if(!do_indent(io_ch, arg, indent)) return -1;
				outlen += indent;
			}
		}
		prev = ent->set;
		fn = X509_NAME_ENTRY_get_object(ent);
		val = X509_NAME_ENTRY_get_data(ent);
		fn_nid = OBJ_obj2nid(fn);
		if(fn_opt != XN_FLAG_FN_NONE) {
			int objlen, fld_len;
			if((fn_opt == XN_FLAG_FN_OID) || (fn_nid==NID_undef) ) {
				OBJ_obj2txt(objtmp, sizeof objtmp, fn, 1);
				fld_len = 0; /* XXX: what should this be? */
				objbuf = objtmp;
			} else {
				if(fn_opt == XN_FLAG_FN_SN) {
					fld_len = FN_WIDTH_SN;
					objbuf = OBJ_nid2sn(fn_nid);
				} else if(fn_opt == XN_FLAG_FN_LN) {
					fld_len = FN_WIDTH_LN;
					objbuf = OBJ_nid2ln(fn_nid);
				} else {
					fld_len = 0; /* XXX: what should this be? */
					objbuf = "";
				}
			}
			objlen = strlen(objbuf);
			if(!io_ch(arg, objbuf, objlen)) return -1;
			if ((objlen < fld_len) && (flags & XN_FLAG_FN_ALIGN)) {
				if (!do_indent(io_ch, arg, fld_len - objlen)) return -1;
				outlen += fld_len - objlen;
			}
			if(!io_ch(arg, sep_eq, sep_eq_len)) return -1;
			outlen += objlen + sep_eq_len;
		}
		/* If the field name is unknown then fix up the DER dump
		 * flag. We might want to limit this further so it will
 		 * DER dump on anything other than a few 'standard' fields.
		 */
		if((fn_nid == NID_undef) && (flags & XN_FLAG_DUMP_UNKNOWN_FIELDS)) 
					orflags = ASN1_STRFLGS_DUMP_ALL;
		else orflags = 0;
     
		len = do_print_ex(io_ch, arg, flags | orflags, val);
		if(len < 0) return -1;
		outlen += len;
	}
	return outlen;
}

/* Wrappers round the main functions */

int X509_NAME_print_ex(BIO *out, X509_NAME *nm, int indent, unsigned long flags)
{
	if(flags == XN_FLAG_COMPAT)
		return X509_NAME_print(out, nm, indent);
	return do_name_ex(send_bio_chars, out, nm, indent, flags);
}

#ifndef OPENSSL_NO_FP_API
int X509_NAME_print_ex_fp(FILE *fp, X509_NAME *nm, int indent, unsigned long flags)
{
	if(flags == XN_FLAG_COMPAT)
		{
		BIO *btmp;
		int ret;
		btmp = BIO_new_fp(fp, BIO_NOCLOSE);
		if(!btmp) return -1;
		ret = X509_NAME_print(btmp, nm, indent);
		BIO_free(btmp);
		return ret;
		}
	return do_name_ex(send_fp_chars, fp, nm, indent, flags);
}
#endif

int ASN1_STRING_print_ex(BIO *out, ASN1_STRING *str, unsigned long flags)
{
	return do_print_ex(send_bio_chars, out, flags, str);
}

#ifndef OPENSSL_NO_FP_API
int ASN1_STRING_print_ex_fp(FILE *fp, ASN1_STRING *str, unsigned long flags)
{
	return do_print_ex(send_fp_chars, fp, flags, str);
}
#endif

/* Utility function: convert any string type to UTF8, returns number of bytes
 * in output string or a negative error code
 */

int ASN1_STRING_to_UTF8(unsigned char **out, ASN1_STRING *in)
{
	ASN1_STRING stmp, *str = &stmp;
	int mbflag, type, ret;
	if(!in) return -1;
	type = in->type;
	if((type < 0) || (type > 30)) return -1;
	mbflag = tag2nbyte[type];
	if(mbflag == -1) return -1;
	mbflag |= MBSTRING_FLAG;
	stmp.data = NULL;
	ret = ASN1_mbstring_copy(&str, in->data, in->length, mbflag, B_ASN1_UTF8STRING);
	if(ret < 0) return ret;
	*out = stmp.data;
	return stmp.length;
}