asn1_gen.c

开源的ssl算法openssl,版本0.9.8H

			return 0;
			break;

			}
		}
	else
		*pclass = V_ASN1_CONTEXT_SPECIFIC;

	return 1;

	}

/* Handle multiple types: SET and SEQUENCE */

static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
	{
	ASN1_TYPE *ret = NULL, *typ = NULL;
	STACK_OF(ASN1_TYPE) *sk = NULL;
	STACK_OF(CONF_VALUE) *sect = NULL;
	unsigned char *der = NULL, *p;
	int derlen;
	int i, is_set;
	sk = sk_ASN1_TYPE_new_null();
	if (section)
		{
		if (!cnf)
			goto bad;
		sect = X509V3_get_section(cnf, (char *)section);
		if (!sect)
			goto bad;
		for (i = 0; i < sk_CONF_VALUE_num(sect); i++)
			{
			typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
			if (!typ)
				goto bad;
			sk_ASN1_TYPE_push(sk, typ);
			typ = NULL;
			}
		}

	/* Now we has a STACK of the components, convert to the correct form */

	if (utype == V_ASN1_SET)
		is_set = 1;
	else
		is_set = 0;


	derlen = i2d_ASN1_SET_OF_ASN1_TYPE(sk, NULL, i2d_ASN1_TYPE, utype,
					   V_ASN1_UNIVERSAL, is_set);
	der = OPENSSL_malloc(derlen);
	p = der;
	i2d_ASN1_SET_OF_ASN1_TYPE(sk, &p, i2d_ASN1_TYPE, utype,
				  V_ASN1_UNIVERSAL, is_set);

	if (!(ret = ASN1_TYPE_new()))
		goto bad;

	if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
		goto bad;

	ret->type = utype;

	ret->value.asn1_string->data = der;
	ret->value.asn1_string->length = derlen;

	der = NULL;

	bad:

	if (der)
		OPENSSL_free(der);

	if (sk)
		sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
	if (typ)
		ASN1_TYPE_free(typ);
	if (sect)
		X509V3_section_free(cnf, sect);

	return ret;
	}

static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok)
	{
	tag_exp_type *exp_tmp;
	/* Can only have IMPLICIT if permitted */
	if ((arg->imp_tag != -1) && !imp_ok)
		{
		ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
		return 0;
		}

	if (arg->exp_count == ASN1_FLAG_EXP_MAX)
		{
		ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
		return 0;
		}

	exp_tmp = &arg->exp_list[arg->exp_count++];

	/* If IMPLICIT set tag to implicit value then
	 * reset implicit tag since it has been used.
	 */
	if (arg->imp_tag != -1)
		{
		exp_tmp->exp_tag = arg->imp_tag;
		exp_tmp->exp_class = arg->imp_class;
		arg->imp_tag = -1;
		arg->imp_class = -1;
		}
	else
		{
		exp_tmp->exp_tag = exp_tag;
		exp_tmp->exp_class = exp_class;
		}
	exp_tmp->exp_constructed = exp_constructed;
	exp_tmp->exp_pad = exp_pad;

	return 1;
	}


static int asn1_str2tag(const char *tagstr, int len)
	{
	unsigned int i;
	static struct tag_name_st *tntmp, tnst [] = {
		ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
		ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
		ASN1_GEN_STR("NULL", V_ASN1_NULL),
		ASN1_GEN_STR("INT", V_ASN1_INTEGER),
		ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
		ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
		ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
		ASN1_GEN_STR("OID", V_ASN1_OBJECT),
		ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
		ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
		ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
		ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
		ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
		ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
		ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
		ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
		ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
		ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
		ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
		ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
		ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
		ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
		ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
		ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
		ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
		ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
		ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
		ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
		ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
		ASN1_GEN_STR("T61", V_ASN1_T61STRING),
		ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
		ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
		ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
		ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),

		/* Special cases */
		ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
		ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
		ASN1_GEN_STR("SET", V_ASN1_SET),
		/* type modifiers */
		/* Explicit tag */
		ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
		ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
		/* Implicit tag */
		ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
		ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
		/* OCTET STRING wrapper */
		ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
		/* SEQUENCE wrapper */
		ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
		/* SET wrapper */
		ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
		/* BIT STRING wrapper */
		ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
		ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
		ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
	};

	if (len == -1)
		len = strlen(tagstr);
	
	tntmp = tnst;	
	for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++)
		{
		if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
			return tntmp->tag;
		}
	
	return -1;
	}

static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
	{
	ASN1_TYPE *atmp = NULL;

	CONF_VALUE vtmp;

	unsigned char *rdata;
	long rdlen;

	int no_unused = 1;

	if (!(atmp = ASN1_TYPE_new()))
		{
		ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
		return NULL;
		}

	if (!str)
		str = "";

	switch(utype)
		{

		case V_ASN1_NULL:
		if (str && *str)
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
			goto bad_form;
			}
		break;
		
		case V_ASN1_BOOLEAN:
		if (format != ASN1_GEN_FORMAT_ASCII)
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
			goto bad_form;
			}
		vtmp.name = NULL;
		vtmp.section = NULL;
		vtmp.value = (char *)str;
		if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean))
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
			goto bad_str;
			}
		break;

		case V_ASN1_INTEGER:
		case V_ASN1_ENUMERATED:
		if (format != ASN1_GEN_FORMAT_ASCII)
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
			goto bad_form;
			}
		if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str)))
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
			goto bad_str;
			}
		break;

		case V_ASN1_OBJECT:
		if (format != ASN1_GEN_FORMAT_ASCII)
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
			goto bad_form;
			}
		if (!(atmp->value.object = OBJ_txt2obj(str, 0)))
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
			goto bad_str;
			}
		break;

		case V_ASN1_UTCTIME:
		case V_ASN1_GENERALIZEDTIME:
		if (format != ASN1_GEN_FORMAT_ASCII)
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
			goto bad_form;
			}
		if (!(atmp->value.asn1_string = ASN1_STRING_new()))
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
			goto bad_str;
			}
		if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1))
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
			goto bad_str;
			}
		atmp->value.asn1_string->type = utype;
		if (!ASN1_TIME_check(atmp->value.asn1_string))
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
			goto bad_str;
			}

		break;

		case V_ASN1_BMPSTRING:
		case V_ASN1_PRINTABLESTRING:
		case V_ASN1_IA5STRING:
		case V_ASN1_T61STRING:
		case V_ASN1_UTF8STRING:
		case V_ASN1_VISIBLESTRING:
		case V_ASN1_UNIVERSALSTRING:
		case V_ASN1_GENERALSTRING:

		if (format == ASN1_GEN_FORMAT_ASCII)
			format = MBSTRING_ASC;
		else if (format == ASN1_GEN_FORMAT_UTF8)
			format = MBSTRING_UTF8;
		else
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
			goto bad_form;
			}


		if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
						-1, format, ASN1_tag2bit(utype)) <= 0)
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
			goto bad_str;
			}
		

		break;

		case V_ASN1_BIT_STRING:

		case V_ASN1_OCTET_STRING:

		if (!(atmp->value.asn1_string = ASN1_STRING_new()))
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
			goto bad_form;
			}

		if (format == ASN1_GEN_FORMAT_HEX)
			{

			if (!(rdata = string_to_hex((char *)str, &rdlen)))
				{
				ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
				goto bad_str;
				}

			atmp->value.asn1_string->data = rdata;
			atmp->value.asn1_string->length = rdlen;
			atmp->value.asn1_string->type = utype;

			}
		else if (format == ASN1_GEN_FORMAT_ASCII)
			ASN1_STRING_set(atmp->value.asn1_string, str, -1);
		else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING))
			{
			if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string))
				{
				ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
				goto bad_str;
				}
			no_unused = 0;
			
			}
		else 
			{
			ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
			goto bad_form;
			}

		if ((utype == V_ASN1_BIT_STRING) && no_unused)
			{
			atmp->value.asn1_string->flags
				&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
        		atmp->value.asn1_string->flags
				|= ASN1_STRING_FLAG_BITS_LEFT;
			}


		break;

		default:
		ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
		goto bad_str;
		break;
		}


	atmp->type = utype;
	return atmp;


	bad_str:
	ERR_add_error_data(2, "string=", str);
	bad_form:

	ASN1_TYPE_free(atmp);
	return NULL;

	}

static int bitstr_cb(const char *elem, int len, void *bitstr)
	{
	long bitnum;
	char *eptr;
	if (!elem)
		return 0;
	bitnum = strtoul(elem, &eptr, 10);
	if (eptr && *eptr && (eptr != elem + len))
		return 0;
	if (bitnum < 0)
		{
		ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
		return 0;
		}
	if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1))
		{
		ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
		return 0;
		}
	return 1;
	}