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/*
* Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/err.h>
#include <openssl/asn1t.h>
#include <openssl/x509_acert.h>
/*-
* Definition of IetfAttrSyntax from RFC 5755 4.4
*
* IetfAttrSyntax ::= SEQUENCE {
* policyAuthority [0] GeneralNames OPTIONAL,
* values SEQUENCE OF CHOICE {
* octets OCTET STRING,
* oid OBJECT IDENTIFIER,
* string UTF8String
* }
* }
*
* Section 4.4.2 states that all values in the sequence MUST use the
* same choice of value (octet, oid or string).
*/
struct OSSL_IETF_ATTR_SYNTAX_VALUE_st {
int type;
union {
ASN1_OCTET_STRING *octets;
ASN1_OBJECT *oid;
ASN1_UTF8STRING *string;
} u;
};
struct OSSL_IETF_ATTR_SYNTAX_st {
GENERAL_NAMES *policyAuthority;
int type;
STACK_OF(OSSL_IETF_ATTR_SYNTAX_VALUE) *values;
};
ASN1_CHOICE(OSSL_IETF_ATTR_SYNTAX_VALUE) = {
ASN1_SIMPLE(OSSL_IETF_ATTR_SYNTAX_VALUE, u.octets, ASN1_OCTET_STRING),
ASN1_SIMPLE(OSSL_IETF_ATTR_SYNTAX_VALUE, u.oid, ASN1_OBJECT),
ASN1_SIMPLE(OSSL_IETF_ATTR_SYNTAX_VALUE, u.string, ASN1_UTF8STRING),
} ASN1_CHOICE_END(OSSL_IETF_ATTR_SYNTAX_VALUE)
ASN1_SEQUENCE(OSSL_IETF_ATTR_SYNTAX) = {
ASN1_IMP_SEQUENCE_OF_OPT(OSSL_IETF_ATTR_SYNTAX, policyAuthority, GENERAL_NAME, 0),
ASN1_SEQUENCE_OF(OSSL_IETF_ATTR_SYNTAX, values, OSSL_IETF_ATTR_SYNTAX_VALUE),
} ASN1_SEQUENCE_END(OSSL_IETF_ATTR_SYNTAX)
IMPLEMENT_ASN1_ALLOC_FUNCTIONS(OSSL_IETF_ATTR_SYNTAX)
IMPLEMENT_ASN1_ALLOC_FUNCTIONS(OSSL_IETF_ATTR_SYNTAX_VALUE)
OSSL_IETF_ATTR_SYNTAX *d2i_OSSL_IETF_ATTR_SYNTAX (OSSL_IETF_ATTR_SYNTAX **a,
const unsigned char **in,
long len)
{
OSSL_IETF_ATTR_SYNTAX *ias;
int i;
ias = (OSSL_IETF_ATTR_SYNTAX *) ASN1_item_d2i((ASN1_VALUE **)a, in, len,
OSSL_IETF_ATTR_SYNTAX_it());
if (ias == NULL)
return ias;
for (i = 0; i < sk_OSSL_IETF_ATTR_SYNTAX_VALUE_num(ias->values); i++)
{
OSSL_IETF_ATTR_SYNTAX_VALUE *val;
val = sk_OSSL_IETF_ATTR_SYNTAX_VALUE_value(ias->values, i);
if (i == 0)
ias->type = val->type;
else if (val->type != ias->type)
goto invalid_types;
}
return ias;
invalid_types:
OSSL_IETF_ATTR_SYNTAX_free(ias);
if (a)
*a = NULL;
ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_INVALID_ARGUMENT);
return NULL;
}
int i2d_OSSL_IETF_ATTR_SYNTAX (const OSSL_IETF_ATTR_SYNTAX *a,
unsigned char **out)
{
return ASN1_item_i2d((const ASN1_VALUE *)a, out, OSSL_IETF_ATTR_SYNTAX_it());
}
int OSSL_IETF_ATTR_SYNTAX_get_value_num(const OSSL_IETF_ATTR_SYNTAX *a)
{
if (a->values == NULL)
return 0;
return sk_OSSL_IETF_ATTR_SYNTAX_VALUE_num(a->values);
}
const GENERAL_NAMES *
OSSL_IETF_ATTR_SYNTAX_get0_policyAuthority(const OSSL_IETF_ATTR_SYNTAX *a)
{
return a->policyAuthority;
}
void OSSL_IETF_ATTR_SYNTAX_set0_policyAuthority(OSSL_IETF_ATTR_SYNTAX *a,
GENERAL_NAMES *names)
{
GENERAL_NAMES_free(a->policyAuthority);
a->policyAuthority = names;
}
void *OSSL_IETF_ATTR_SYNTAX_get0_value(const OSSL_IETF_ATTR_SYNTAX *a,
int ind, int *type)
{
OSSL_IETF_ATTR_SYNTAX_VALUE *val;
val = sk_OSSL_IETF_ATTR_SYNTAX_VALUE_value(a->values, ind);
if (val == NULL)
return NULL;
if (type != NULL)
*type = val->type;
switch (val->type) {
case OSSL_IETFAS_OCTETS:
return val->u.octets;
case OSSL_IETFAS_OID:
return val->u.oid;
case OSSL_IETFAS_STRING:
return val->u.string;
}
return NULL;
}
int OSSL_IETF_ATTR_SYNTAX_add1_value(OSSL_IETF_ATTR_SYNTAX *a, int type,
void *data)
{
OSSL_IETF_ATTR_SYNTAX_VALUE *val;
if (data == NULL)
return 0;
if (a->values == NULL) {
if ((a->values = sk_OSSL_IETF_ATTR_SYNTAX_VALUE_new_null()) == NULL)
goto err;
a->type = type;
}
if (type != a->type) {
ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_INVALID_ARGUMENT);
return 0;
}
if ((val = OSSL_IETF_ATTR_SYNTAX_VALUE_new()) == NULL)
goto err;
val->type = type;
switch (type) {
case OSSL_IETFAS_OCTETS:
val->u.octets = data;
break;
case OSSL_IETFAS_OID:
val->u.oid = data;
break;
case OSSL_IETFAS_STRING:
val->u.string = data;
break;
default:
ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_INVALID_ARGUMENT);
return 0;
}
if (sk_OSSL_IETF_ATTR_SYNTAX_VALUE_push(a->values, val) <= 0) {
OSSL_IETF_ATTR_SYNTAX_VALUE_free(val);
return 0;
}
return 1;
err:
ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
return 0;
}
int OSSL_IETF_ATTR_SYNTAX_print(BIO *bp, OSSL_IETF_ATTR_SYNTAX *a, int indent)
{
int i;
if (a->policyAuthority != NULL) {
for (i = 0; i < sk_GENERAL_NAME_num(a->policyAuthority); i++) {
if (BIO_printf(bp, "%*s", indent, "") <= 0)
goto err;
if (GENERAL_NAME_print(bp, sk_GENERAL_NAME_value(a->policyAuthority,
i)) <= 0)
goto err;
if (BIO_printf(bp, "\n") <= 0)
goto err;
}
}
for (i = 0; i < OSSL_IETF_ATTR_SYNTAX_get_value_num(a); i++) {
char oidstr[80];
int ietf_type;
void *attr_value = OSSL_IETF_ATTR_SYNTAX_get0_value(a, i, &ietf_type);
if (attr_value == NULL)
goto err;
if (BIO_printf(bp, "%*s", indent, "") <= 0)
goto err;
switch (ietf_type) {
case OSSL_IETFAS_OID:
OBJ_obj2txt(oidstr, sizeof(oidstr), attr_value, 0);
BIO_printf(bp, "%.*s", (int) sizeof(oidstr), oidstr);
break;
case OSSL_IETFAS_OCTETS:
case OSSL_IETFAS_STRING:
ASN1_STRING_print(bp, attr_value);
break;
}
}
if (BIO_printf(bp, "\n") <= 0)
goto err;
return 1;
err:
return 0;
}
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