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b193d75a1568e1da7f7ea35ade35a796a29796f5
heimdal/lib/hx509/name.c
Nicolas Williams b193d75a15 hx509: Revamp name handling ahead of new SAN types
2021-01-15 13:21:18 -06:00

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/*
* Copyright (c) 2004 - 2009 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "hx_locl.h"
#include <wind.h>
#include "char_map.h"
/**
* @page page_name PKIX/X.509 Names
*
* There are several names in PKIX/X.509, GeneralName and Name.
*
* A Name consists of an ordered list of Relative Distinguished Names
* (RDN). Each RDN consists of an unordered list of typed strings. The
* types are defined by OID and have long and short description. For
* example id-at-commonName (2.5.4.3) have the long name CommonName
* and short name CN. The string itself can be of several encoding,
* UTF8, UTF16, Teltex string, etc. The type limit what encoding
* should be used.
*
* GeneralName is a broader nametype that can contains al kind of
* stuff like Name, IP addresses, partial Name, etc.
*
* Name is mapped into a hx509_name object.
*
* Parse and string name into a hx509_name object with hx509_parse_name(),
* make it back into string representation with hx509_name_to_string().
*
* Name string are defined rfc2253, rfc1779 and X.501.
*
* See the library functions here: @ref hx509_name
*/
static const struct {
const char *n;
const heim_oid *o;
wind_profile_flags flags;
/*
* RFC52380 imposes maximum lengths for some strings in Names. These are
* ASN.1 size limits. We should implement these in our copy of the PKIX
* ASN.1 module. For now we treat them as maximum byte counts rather than
* maximum character counts, and we encode and enforce them here.
*
* 0 -> no max
*/
size_t max_bytes;
} no[] = {
{ "C", &asn1_oid_id_at_countryName, 0, 2 },
{ "CN", &asn1_oid_id_at_commonName, 0, ub_common_name },
{ "DC", &asn1_oid_id_domainComponent, 0, 63 }, /* DNS label */
{ "L", &asn1_oid_id_at_localityName, 0, ub_locality_name },
{ "O", &asn1_oid_id_at_organizationName, 0, ub_organization_name },
{ "OU", &asn1_oid_id_at_organizationalUnitName, 0, ub_organizational_unit_name },
{ "S", &asn1_oid_id_at_stateOrProvinceName, 0, ub_state_name },
{ "STREET", &asn1_oid_id_at_streetAddress, 0, 0 }, /* ENOTSUP */
{ "UID", &asn1_oid_id_Userid, 0, ub_numeric_user_id_length },
{ "emailAddress", &asn1_oid_id_pkcs9_emailAddress, 0, ub_emailaddress_length },
{ "serialNumber", &asn1_oid_id_at_serialNumber, 0, ub_serial_number }
};
static char *
quote_string(const char *f, size_t len, int flags, size_t *rlen)
{
size_t i, j, tolen;
const unsigned char *from = (const unsigned char *)f;
unsigned char *to;
tolen = len * 3 + 1;
to = malloc(tolen);
if (to == NULL)
return NULL;
for (i = 0, j = 0; i < len; i++) {
unsigned char map = char_map[from[i]] & flags;
if (i == 0 && (map & Q_RFC2253_QUOTE_FIRST)) {
to[j++] = '\\';
to[j++] = from[i];
} else if ((i + 1) == len && (map & Q_RFC2253_QUOTE_LAST)) {
to[j++] = '\\';
to[j++] = from[i];
} else if (map & Q_RFC2253_QUOTE) {
to[j++] = '\\';
to[j++] = from[i];
} else if (map & Q_RFC2253_HEX) {
int l = snprintf((char *)&to[j], tolen - j - 1,
"#%02x", (unsigned char)from[i]);
j += l;
} else {
to[j++] = from[i];
}
}
to[j] = '\0';
assert(j < tolen);
*rlen = j;
return (char *)to;
}
static int
append_string(char **str, size_t *total_len, const char *ss,
size_t len, int quote)
{
char *s, *qs;
if (quote)
qs = quote_string(ss, len, Q_RFC2253, &len);
else
qs = rk_UNCONST(ss);
s = realloc(*str, len + *total_len + 1);
if (s == NULL)
_hx509_abort("allocation failure"); /* XXX */
memcpy(s + *total_len, qs, len);
if (qs != ss)
free(qs);
s[*total_len + len] = '\0';
*str = s;
*total_len += len;
return 0;
}
static char *
oidtostring(const heim_oid *type)
{
char *s;
size_t i;
for (i = 0; i < sizeof(no)/sizeof(no[0]); i++) {
if (der_heim_oid_cmp(no[i].o, type) == 0)
return strdup(no[i].n);
}
if (der_print_heim_oid(type, '.', &s) != 0)
return NULL;
return s;
}
static size_t
oidtomaxlen(const heim_oid *type)
{
size_t i;
for (i = 0; i < sizeof(no)/sizeof(no[0]); i++) {
if (der_heim_oid_cmp(no[i].o, type) == 0)
return no[i].max_bytes;
}
return 0;
}
static int
stringtooid(const char *name, size_t len, heim_oid *oid)
{
int ret;
size_t i;
char *s;
memset(oid, 0, sizeof(*oid));
for (i = 0; i < sizeof(no)/sizeof(no[0]); i++) {
if (strncasecmp(no[i].n, name, len) == 0)
return der_copy_oid(no[i].o, oid);
}
s = malloc(len + 1);
if (s == NULL)
return ENOMEM;
memcpy(s, name, len);
s[len] = '\0';
ret = der_parse_heim_oid(s, ".", oid);
free(s);
return ret;
}
/**
* Convert the hx509 name object into a printable string.
* The resulting string should be freed with free().
*
* @param name name to print
* @param str the string to return
*
* @return An hx509 error code, see hx509_get_error_string().
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_name_to_string(const hx509_name name, char **str)
{
return _hx509_Name_to_string(&name->der_name, str);
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
_hx509_Name_to_string(const Name *n, char **str)
{
size_t total_len = 0;
size_t i, j, m;
int ret;
*str = strdup("");
if (*str == NULL)
return ENOMEM;
for (m = n->u.rdnSequence.len; m > 0; m--) {
size_t len;
i = m - 1;
for (j = 0; j < n->u.rdnSequence.val[i].len; j++) {
DirectoryString *ds = &n->u.rdnSequence.val[i].val[j].value;
char *oidname;
char *ss;
oidname = oidtostring(&n->u.rdnSequence.val[i].val[j].type);
switch(ds->element) {
case choice_DirectoryString_ia5String:
ss = ds->u.ia5String.data;
len = ds->u.ia5String.length;
break;
case choice_DirectoryString_printableString:
ss = ds->u.printableString.data;
len = ds->u.printableString.length;
break;
case choice_DirectoryString_utf8String:
ss = ds->u.utf8String;
len = strlen(ss);
break;
case choice_DirectoryString_bmpString: {
const uint16_t *bmp = ds->u.bmpString.data;
size_t bmplen = ds->u.bmpString.length;
size_t k;
ret = wind_ucs2utf8_length(bmp, bmplen, &k);
if (ret) {
free(oidname);
free(*str);
*str = NULL;
return ret;
}
ss = malloc(k + 1);
if (ss == NULL)
_hx509_abort("allocation failure"); /* XXX */
ret = wind_ucs2utf8(bmp, bmplen, ss, NULL);
if (ret) {
free(oidname);
free(ss);
free(*str);
*str = NULL;
return ret;
}
ss[k] = '\0';
len = k;
break;
}
case choice_DirectoryString_teletexString:
ss = ds->u.teletexString;
len = strlen(ss);
break;
case choice_DirectoryString_universalString: {
const uint32_t *uni = ds->u.universalString.data;
size_t unilen = ds->u.universalString.length;
size_t k;
ret = wind_ucs4utf8_length(uni, unilen, &k);
if (ret) {
free(oidname);
free(*str);
*str = NULL;
return ret;
}
ss = malloc(k + 1);
if (ss == NULL)
_hx509_abort("allocation failure"); /* XXX */
ret = wind_ucs4utf8(uni, unilen, ss, NULL);
if (ret) {
free(ss);
free(oidname);
free(*str);
*str = NULL;
return ret;
}
ss[k] = '\0';
len = k;
break;
}
default:
_hx509_abort("unknown directory type: %d", ds->element);
exit(1);
}
append_string(str, &total_len, oidname, strlen(oidname), 0);
free(oidname);
append_string(str, &total_len, "=", 1, 0);
append_string(str, &total_len, ss, len, 1);
if (ds->element == choice_DirectoryString_bmpString ||
ds->element == choice_DirectoryString_universalString)
{
free(ss);
}
if (j + 1 < n->u.rdnSequence.val[i].len)
append_string(str, &total_len, "+", 1, 0);
}
if (i > 0)
append_string(str, &total_len, ",", 1, 0);
}
return 0;
}
#define COPYCHARARRAY(_ds,_el,_l,_n) \
(_l) = strlen(_ds->u._el); \
(_n) = malloc((_l) * sizeof((_n)[0])); \
if ((_n) == NULL) \
return ENOMEM; \
for (i = 0; i < (_l); i++) \
(_n)[i] = _ds->u._el[i]
#define COPYVALARRAY(_ds,_el,_l,_n) \
(_l) = _ds->u._el.length; \
(_n) = malloc((_l) * sizeof((_n)[0])); \
if ((_n) == NULL) \
return ENOMEM; \
for (i = 0; i < (_l); i++) \
(_n)[i] = _ds->u._el.data[i]
#define COPYVOIDARRAY(_ds,_el,_l,_n) \
(_l) = _ds->u._el.length; \
(_n) = malloc((_l) * sizeof((_n)[0])); \
if ((_n) == NULL) \
return ENOMEM; \
for (i = 0; i < (_l); i++) \
(_n)[i] = ((unsigned char *)_ds->u._el.data)[i]
static int
dsstringprep(const DirectoryString *ds, uint32_t **rname, size_t *rlen)
{
wind_profile_flags flags;
size_t i, len;
int ret = 0;
uint32_t *name;
*rname = NULL;
*rlen = 0;
switch(ds->element) {
case choice_DirectoryString_ia5String:
flags = WIND_PROFILE_LDAP;
COPYVOIDARRAY(ds, ia5String, len, name);
break;
case choice_DirectoryString_printableString:
flags = WIND_PROFILE_LDAP;
flags |= WIND_PROFILE_LDAP_CASE_EXACT_ATTRIBUTE;
COPYVOIDARRAY(ds, printableString, len, name);
break;
case choice_DirectoryString_teletexString:
flags = WIND_PROFILE_LDAP_CASE;
COPYCHARARRAY(ds, teletexString, len, name);
break;
case choice_DirectoryString_bmpString:
flags = WIND_PROFILE_LDAP;
COPYVALARRAY(ds, bmpString, len, name);
break;
case choice_DirectoryString_universalString:
flags = WIND_PROFILE_LDAP;
COPYVALARRAY(ds, universalString, len, name);
break;
case choice_DirectoryString_utf8String:
flags = WIND_PROFILE_LDAP;
ret = wind_utf8ucs4_length(ds->u.utf8String, &len);
if (ret)
return ret;
name = malloc(len * sizeof(name[0]));
if (name == NULL)
return ENOMEM;
ret = wind_utf8ucs4(ds->u.utf8String, name, &len);
if (ret) {
free(name);
return ret;
}
break;
default:
_hx509_abort("unknown directory type: %d", ds->element);
}
*rlen = len;
/* try a couple of times to get the length right, XXX gross */
for (i = 0; i < 4; i++) {
*rlen = *rlen * 2;
if ((*rname = malloc(*rlen * sizeof((*rname)[0]))) == NULL) {
ret = ENOMEM;
break;
}
ret = wind_stringprep(name, len, *rname, rlen, flags);
if (ret == WIND_ERR_OVERRUN) {
free(*rname);
*rname = NULL;
continue;
} else
break;
}
free(name);
if (ret) {
if (*rname)
free(*rname);
*rname = NULL;
*rlen = 0;
return ret;
}
return 0;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
_hx509_name_ds_cmp(const DirectoryString *ds1,
const DirectoryString *ds2,
int *diff)
{
uint32_t *ds1lp, *ds2lp;
size_t ds1len, ds2len, i;
int ret;
ret = dsstringprep(ds1, &ds1lp, &ds1len);
if (ret)
return ret;
ret = dsstringprep(ds2, &ds2lp, &ds2len);
if (ret) {
free(ds1lp);
return ret;
}
if (ds1len != ds2len)
*diff = ds1len - ds2len;
else {
for (i = 0; i < ds1len; i++) {
*diff = ds1lp[i] - ds2lp[i];
if (*diff)
break;
}
}
free(ds1lp);
free(ds2lp);
return 0;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
_hx509_name_cmp(const Name *n1, const Name *n2, int *c)
{
int ret;
size_t i, j;
*c = n1->u.rdnSequence.len - n2->u.rdnSequence.len;
if (*c)
return 0;
for (i = 0 ; i < n1->u.rdnSequence.len; i++) {
*c = n1->u.rdnSequence.val[i].len - n2->u.rdnSequence.val[i].len;
if (*c)
return 0;
for (j = 0; j < n1->u.rdnSequence.val[i].len; j++) {
*c = der_heim_oid_cmp(&n1->u.rdnSequence.val[i].val[j].type,
&n1->u.rdnSequence.val[i].val[j].type);
if (*c)
return 0;
ret = _hx509_name_ds_cmp(&n1->u.rdnSequence.val[i].val[j].value,
&n2->u.rdnSequence.val[i].val[j].value,
c);
if (ret)
return ret;
if (*c)
return 0;
}
}
*c = 0;
return 0;
}
/**
* Compare to hx509 name object, useful for sorting.
*
* @param n1 a hx509 name object.
* @param n2 a hx509 name object.
*
* @return 0 the objects are the same, returns > 0 is n2 is "larger"
* then n2, < 0 if n1 is "smaller" then n2.
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_name_cmp(hx509_name n1, hx509_name n2)
{
int ret, diff;
ret = _hx509_name_cmp(&n1->der_name, &n2->der_name, &diff);
if (ret)
return ret;
return diff;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
_hx509_name_from_Name(const Name *n, hx509_name *name)
{
int ret;
*name = calloc(1, sizeof(**name));
if (*name == NULL)
return ENOMEM;
ret = copy_Name(n, &(*name)->der_name);
if (ret) {
free(*name);
*name = NULL;
}
return ret;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
_hx509_name_modify(hx509_context context,
Name *name,
int append,
const heim_oid *oid,
const char *str)
{
RelativeDistinguishedName rdn;
size_t max_len = oidtomaxlen(oid);
int ret;
/*
* Check string length upper bounds.
*
* Because we don't have these bounds in our copy of the PKIX ASN.1 module,
* and because we might like to catch these early anyways, we enforce them
* here.
*/
if (max_len && strlen(str) > max_len) {
const char *a = oidtostring(oid);
ret = HX509_PARSING_NAME_FAILED;
hx509_set_error_string(context, 0, ret, "RDN attribute %s value too "
"long (max %llu): %s", a ? a : "<unknown>",
max_len, str);
return ret;
}
memset(&rdn, 0, sizeof(rdn));
if ((rdn.val = malloc(sizeof(rdn.val[0]))) == NULL) {
hx509_set_error_string(context, 0, ENOMEM, "Out of memory");
return ENOMEM;
}
rdn.len = 1;
rdn.val[0].value.element = choice_DirectoryString_utf8String;
if ((rdn.val[0].value.u.utf8String = strdup(str)) == NULL ||
(ret = der_copy_oid(oid, &rdn.val[0].type))) {
hx509_set_error_string(context, 0, ENOMEM, "Out of memory");
free(rdn.val[0].value.u.utf8String);
free(rdn.val);
return ENOMEM;
}
/* Append RDN. If the caller wanted to prepend instead, we'll rotate. */
ret = add_RDNSequence(&name->u.rdnSequence, &rdn);
free_RelativeDistinguishedName(&rdn);
if (ret || append || name->u.rdnSequence.len < 2)
return ret;
/* Rotate */
rdn = name->u.rdnSequence.val[name->u.rdnSequence.len - 1];
memmove(&name->u.rdnSequence.val[1],
&name->u.rdnSequence.val[0],
(name->u.rdnSequence.len - 1) *
sizeof(name->u.rdnSequence.val[0]));
name->u.rdnSequence.val[0] = rdn;
return 0;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_empty_name(hx509_context context, hx509_name *name)
{
if ((*name = calloc(1, sizeof(**name))) == NULL) {
hx509_set_error_string(context, 0, ENOMEM, "out of memory");
return ENOMEM;
}
(*name)->der_name.element = choice_Name_rdnSequence;
(*name)->der_name.u.rdnSequence.val = 0;
(*name)->der_name.u.rdnSequence.len = 0;
return 0;
}
/**
* Parse a string into a hx509 name object.
*
* @param context A hx509 context.
* @param str a string to parse.
* @param name the resulting object, NULL in case of error.
*
* @return An hx509 error code, see hx509_get_error_string().
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_parse_name(hx509_context context, const char *str, hx509_name *name)
{
const char *p, *q;
size_t len;
hx509_name n;
int ret;
*name = NULL;
n = calloc(1, sizeof(*n));
if (n == NULL) {
hx509_set_error_string(context, 0, ENOMEM, "out of memory");
return ENOMEM;
}
n->der_name.element = choice_Name_rdnSequence;
p = str;
while (p != NULL && *p != '\0') {
heim_oid oid;
int last;
q = strchr(p, ',');
if (q) {
len = (q - p);
last = 1;
} else {
len = strlen(p);
last = 0;
}
q = strchr(p, '=');
if (q == NULL) {
ret = HX509_PARSING_NAME_FAILED;
hx509_set_error_string(context, 0, ret, "missing = in %s", p);
goto out;
}
if (q == p) {
ret = HX509_PARSING_NAME_FAILED;
hx509_set_error_string(context, 0, ret,
"missing name before = in %s", p);
goto out;
}
if ((size_t)(q - p) > len) {
ret = HX509_PARSING_NAME_FAILED;
hx509_set_error_string(context, 0, ret, " = after , in %s", p);
goto out;
}
ret = stringtooid(p, q - p, &oid);
if (ret) {
ret = HX509_PARSING_NAME_FAILED;
hx509_set_error_string(context, 0, ret,
"unknown type: %.*s", (int)(q - p), p);
goto out;
}
{
size_t pstr_len = len - (q - p) - 1;
const char *pstr = p + (q - p) + 1;
char *r;
r = malloc(pstr_len + 1);
if (r == NULL) {
der_free_oid(&oid);
ret = ENOMEM;
hx509_set_error_string(context, 0, ret, "out of memory");
goto out;
}
memcpy(r, pstr, pstr_len);
r[pstr_len] = '\0';
ret = _hx509_name_modify(context, &n->der_name, 0, &oid, r);
free(r);
der_free_oid(&oid);
if(ret)
goto out;
}
p += len + last;
}
*name = n;
return 0;
out:
hx509_name_free(&n);
return HX509_NAME_MALFORMED;
}
/**
* Copy a hx509 name object.
*
* @param context A hx509 cotext.
* @param from the name to copy from
* @param to the name to copy to
*
* @return An hx509 error code, see hx509_get_error_string().
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_name_copy(hx509_context context, const hx509_name from, hx509_name *to)
{
int ret;
*to = calloc(1, sizeof(**to));
if (*to == NULL)
return ENOMEM;
ret = copy_Name(&from->der_name, &(*to)->der_name);
if (ret) {
free(*to);
*to = NULL;
return ENOMEM;
}
return 0;
}
/**
* Convert a hx509_name into a Name.
*
* @param from the name to copy from
* @param to the name to copy to
*
* @return An hx509 error code, see hx509_get_error_string().
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_name_to_Name(const hx509_name from, Name *to)
{
return copy_Name(&from->der_name, to);
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_name_normalize(hx509_context context, hx509_name name)
{
return 0;
}
/**
* Expands variables in the name using env. Variables are on the form
* ${name}. Useful when dealing with certificate templates.
*
* @param context A hx509 cotext.
* @param name the name to expand.
* @param env environment variable to expand.
*
* @return An hx509 error code, see hx509_get_error_string().
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_name_expand(hx509_context context,
hx509_name name,
hx509_env env)
{
Name *n = &name->der_name;
size_t i, j;
int bounds_check = 1;
if (env == NULL)
return 0;
if (n->element != choice_Name_rdnSequence) {
hx509_set_error_string(context, 0, EINVAL, "RDN not of supported type");
return EINVAL;
}
for (i = 0 ; i < n->u.rdnSequence.len; i++) {
for (j = 0; j < n->u.rdnSequence.val[i].len; j++) {
/** Only UTF8String rdnSequence names are allowed */
/*
THIS SHOULD REALLY BE:
COMP = n->u.rdnSequence.val[i].val[j];
normalize COMP to utf8
check if there are variables
expand variables
convert back to orignal format, store in COMP
free normalized utf8 string
*/
DirectoryString *ds = &n->u.rdnSequence.val[i].val[j].value;
heim_oid *type = &n->u.rdnSequence.val[i].val[j].type;
char *p, *p2;
struct rk_strpool *strpool = NULL;
if (ds->element != choice_DirectoryString_utf8String) {
hx509_set_error_string(context, 0, EINVAL, "unsupported type");
return EINVAL;
}
p = strstr(ds->u.utf8String, "${");
if (p) {
strpool = rk_strpoolprintf(strpool, "%.*s",
(int)(p - ds->u.utf8String),
ds->u.utf8String);
if (strpool == NULL) {
hx509_set_error_string(context, 0, ENOMEM, "out of memory");
return ENOMEM;
}
}
while (p != NULL) {
/* expand variables */
const char *value;
p2 = strchr(p, '}');
if (p2 == NULL) {
hx509_set_error_string(context, 0, EINVAL, "missing }");
rk_strpoolfree(strpool);
return EINVAL;
}
p += 2;
value = hx509_env_lfind(context, env, p, p2 - p);
if (value == NULL) {
hx509_set_error_string(context, 0, EINVAL,
"variable %.*s missing",
(int)(p2 - p), p);
rk_strpoolfree(strpool);
return EINVAL;
}
strpool = rk_strpoolprintf(strpool, "%s", value);
if (strpool == NULL) {
hx509_set_error_string(context, 0, ENOMEM, "out of memory");
return ENOMEM;
}
p2++;
p = strstr(p2, "${");
if (p)
strpool = rk_strpoolprintf(strpool, "%.*s",
(int)(p - p2), p2);
else
strpool = rk_strpoolprintf(strpool, "%s", p2);
if (strpool == NULL) {
hx509_set_error_string(context, 0, ENOMEM, "out of memory");
return ENOMEM;
}
}
if (strpool) {
size_t max_bytes;
free(ds->u.utf8String);
ds->u.utf8String = rk_strpoolcollect(strpool);
if (ds->u.utf8String == NULL) {
hx509_set_error_string(context, 0, ENOMEM, "out of memory");
return ENOMEM;
}
/* Check upper bounds! */
if ((max_bytes = oidtomaxlen(type)) &&
strlen(ds->u.utf8String) > max_bytes)
bounds_check = 0;
}
}
}
if (!bounds_check) {
hx509_set_error_string(context, 0, HX509_PARSING_NAME_FAILED,
"some expanded RDNs are too long");
return HX509_PARSING_NAME_FAILED;
}
return 0;
}
/**
* Free a hx509 name object, upond return *name will be NULL.
*
* @param name a hx509 name object to be freed.
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION void HX509_LIB_CALL
hx509_name_free(hx509_name *name)
{
free_Name(&(*name)->der_name);
memset(*name, 0, sizeof(**name));
free(*name);
*name = NULL;
}
/**
* Convert a DER encoded name info a string.
*
* @param data data to a DER/BER encoded name
* @param length length of data
* @param str the resulting string, is NULL on failure.
*
* @return An hx509 error code, see hx509_get_error_string().
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_unparse_der_name(const void *data, size_t length, char **str)
{
Name name;
int ret;
*str = NULL;
ret = decode_Name(data, length, &name, NULL);
if (ret)
return ret;
ret = _hx509_Name_to_string(&name, str);
free_Name(&name);
return ret;
}
/**
* Convert a hx509_name object to DER encoded name.
*
* @param name name to concert
* @param os data to a DER encoded name, free the resulting octet
* string with hx509_xfree(os->data).
*
* @return An hx509 error code, see hx509_get_error_string().
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_name_binary(const hx509_name name, heim_octet_string *os)
{
size_t size;
int ret;
ASN1_MALLOC_ENCODE(Name, os->data, os->length, &name->der_name, &size, ret);
if (ret)
return ret;
if (os->length != size)
_hx509_abort("internal ASN.1 encoder error");
return 0;
}
HX509_LIB_FUNCTION int HX509_LIB_CALL
_hx509_unparse_Name(const Name *aname, char **str)
{
hx509_name name;
int ret;
ret = _hx509_name_from_Name(aname, &name);
if (ret)
return ret;
ret = hx509_name_to_string(name, str);
hx509_name_free(&name);
return ret;
}
/**
* Check if a name is empty.
*
* @param name the name to check if its empty/null.
*
* @return non zero if the name is empty/null.
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_name_is_null_p(const hx509_name name)
{
return name->der_name.element == choice_Name_rdnSequence &&
name->der_name.u.rdnSequence.len == 0;
}
/*
* This necessarily duplicates code from libkrb5, and has to unless we move
* common code here or to lib/roken for it. We do have slightly different
* needs (e.g., we want space quoted, and we want to indicate whether we saw
* trailing garbage, we have no need for flags, no special realm treatment,
* etc) than the corresponding code in libkrb5, so for now we duplicate this
* code.
*
* The relevant RFCs here are RFC1964 for the string representation of Kerberos
* principal names, and RFC4556 for the KRB5PrincipalName ASN.1 type (Kerberos
* lacks such a type because on the wire the name and realm are sent
* separately as a form of cheap compression).
*
* Note that we cannot handle embedded NULs because of Heimdal's representation
* of ASN.1 strings as C strings.
*/
int
_hx509_unparse_KRB5PrincipalName(hx509_context context,
struct rk_strpool **strpool,
heim_any *value)
{
KRB5PrincipalName kn;
size_t len;
int ret;
ret = decode_KRB5PrincipalName(value->data, value->length, &kn, &len);
if (ret == 0 &&
(*strpool = _hx509_unparse_kerberos_name(*strpool, &kn)) == NULL)
ret = hx509_enomem(context);
free_KRB5PrincipalName(&kn);
if (ret == 0 && (value->length != len) &&
(*strpool = rk_strpoolprintf(*strpool, " <garbage>")) == NULL)
ret = hx509_enomem(context);
if (ret) {
rk_strpoolfree(*strpool);
*strpool = rk_strpoolprintf(NULL,
"<error-decoding-PrincipalName");
hx509_set_error_string(context, 0, ret,
"Failed to decode PermanentIdentifier");
}
return ret;
}
struct rk_strpool *
_hx509_unparse_kerberos_name(struct rk_strpool *strpool, KRB5PrincipalName *kn)
{
static const char comp_quotable_chars[] = " \n\t\b\\/@";
static const char realm_quotable_chars[] = " \n\t\b\\@";
const char *s;
size_t i, k, len, plen;
int need_slash = 0;
for (i = 0; i < kn->principalName.name_string.len; i++) {
s = kn->principalName.name_string.val[i];
len = strlen(s);
if (need_slash)
strpool = rk_strpoolprintf(strpool, "/");
need_slash = 1;
for (k = 0; k < len; s += plen, k += plen) {
char c;
plen = strcspn(s, comp_quotable_chars);
if (plen)
strpool = rk_strpoolprintf(strpool, "%.*s", (int)plen, s);
if (k + plen >= len)
continue;
switch ((c = s[plen++])) {
case '\n': strpool = rk_strpoolprintf(strpool, "\\n"); break;
case '\t': strpool = rk_strpoolprintf(strpool, "\\t"); break;
case '\b': strpool = rk_strpoolprintf(strpool, "\\b"); break;
/* default -> '@', ' ', '\\', or '/' */
default: strpool = rk_strpoolprintf(strpool, "\\%c", c); break;
}
}
}
if (!kn->realm)
return strpool;
strpool = rk_strpoolprintf(strpool, "@");
s = kn->realm;
len = strlen(kn->realm);
for (k = 0; k < len; s += plen, k += plen) {
char c;
plen = strcspn(s, realm_quotable_chars);
if (plen)
strpool = rk_strpoolprintf(strpool, "%.*s", (int)plen, s);
if (k + plen >= len)
continue;
switch ((c = s[plen++])) {
case '\n': strpool = rk_strpoolprintf(strpool, "\\n"); break;
case '\t': strpool = rk_strpoolprintf(strpool, "\\t"); break;
case '\b': strpool = rk_strpoolprintf(strpool, "\\b"); break;
/* default -> '@', ' ', or '\\' */
default: strpool = rk_strpoolprintf(strpool, "\\%c", c); break;
}
}
return strpool;
}
int
_hx509_unparse_utf8_string_name(hx509_context context,
struct rk_strpool **strpool,
heim_any *value)
{
PKIXXmppAddr us;
size_t size;
int ret;
ret = decode_PKIXXmppAddr(value->data, value->length, &us, &size);
if (ret == 0 &&
(*strpool = rk_strpoolprintf(*strpool, "%s", us)) == NULL)
ret = hx509_enomem(context);
if (ret) {
rk_strpoolfree(*strpool);
*strpool = rk_strpoolprintf(NULL,
"<error-decoding-UTF8String-SAN>");
hx509_set_error_string(context, 0, ret,
"Failed to decode UTF8String SAN");
}
free_PKIXXmppAddr(&us);
return ret;
}
int
_hx509_unparse_ia5_string_name(hx509_context context,
struct rk_strpool **strpool,
heim_any *value)
{
SRVName us;
size_t size;
int ret;
ret = decode_SRVName(value->data, value->length, &us, &size);
if (ret == 0) {
rk_strpoolfree(*strpool);
*strpool = rk_strpoolprintf(NULL,
"<error-decoding-IA5String-SAN>");
hx509_set_error_string(context, 0, ret,
"Failed to decode UTF8String SAN");
return ret;
}
*strpool = rk_strpoolprintf(*strpool, "%.*s",
(int)us.length, (char *)us.data);
free_SRVName(&us);
return ret;
}
typedef int (*other_unparser_f)(hx509_context,
struct rk_strpool **,
heim_any *);
struct {
const heim_oid *oid;
const char *friendly_name;
other_unparser_f f;
} o_unparsers[] = {
{ &asn1_oid_id_pkinit_san,
"KerberosPrincipalName",
_hx509_unparse_KRB5PrincipalName },
{ &asn1_oid_id_pkix_on_xmppAddr,
"XMPPName",
_hx509_unparse_utf8_string_name },
{ &asn1_oid_id_pkinit_ms_san,
"MSFTKerberosPrincipalName",
_hx509_unparse_utf8_string_name },
};
/**
* Unparse the hx509 name in name into a string.
*
* @param name the name to print
* @param str an allocated string returns the name in string form
*
* @return An hx509 error code, see hx509_get_error_string().
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_general_name_unparse(GeneralName *name, char **str)
{
hx509_context context;
int ret;
if ((ret = hx509_context_init(&context)))
return ret;
return hx509_general_name_unparse2(context, name, str);
}
/**
* Unparse the hx509 name in name into a string.
*
* @param context hx509 library context
* @param name the name to print
* @param str an allocated string returns the name in string form
*
* @return An hx509 error code, see hx509_get_error_string().
*
* @ingroup hx509_name
*/
HX509_LIB_FUNCTION int HX509_LIB_CALL
hx509_general_name_unparse2(hx509_context context,
GeneralName *name,
char **str)
{
struct rk_strpool *strpool = NULL;
int ret = 0;
*str = NULL;
switch (name->element) {
case choice_GeneralName_otherName: {
size_t i;
char *oid;
ret = hx509_oid_sprint(&name->u.otherName.type_id, &oid);
if (ret == 0)
strpool = rk_strpoolprintf(strpool, "otherName: %s ", oid);
if (strpool == NULL)
ret = ENOMEM;
for (i = 0; ret == 0 && i < sizeof(o_unparsers)/sizeof(o_unparsers[0]); i++) {
if (der_heim_oid_cmp(&name->u.otherName.type_id,
o_unparsers[i].oid))
continue;
strpool = rk_strpoolprintf(strpool, "%s ",o_unparsers[i].friendly_name);
if (strpool == NULL)
ret = ENOMEM;
if (ret == 0)
ret = o_unparsers[i].f(context, &strpool, &name->u.otherName.value);
break;
}
if (ret == 0 && i == sizeof(o_unparsers)/sizeof(o_unparsers[0])) {
strpool = rk_strpoolprintf(strpool, "<unknown-other-name-type>");
ret = ENOTSUP;
}
free(oid);
break;
}
case choice_GeneralName_rfc822Name:
strpool = rk_strpoolprintf(strpool, "rfc822Name: %.*s",
(int)name->u.rfc822Name.length,
(char *)name->u.rfc822Name.data);
break;
case choice_GeneralName_dNSName:
strpool = rk_strpoolprintf(strpool, "dNSName: %.*s",
(int)name->u.dNSName.length,
(char *)name->u.dNSName.data);
break;
case choice_GeneralName_directoryName: {
Name dir;
char *s;
memset(&dir, 0, sizeof(dir));
dir.element = (enum Name_enum)name->u.directoryName.element;
dir.u.rdnSequence = name->u.directoryName.u.rdnSequence;
ret = _hx509_unparse_Name(&dir, &s);
if (ret)
return ret;
strpool = rk_strpoolprintf(strpool, "directoryName: %s", s);
free(s);
break;
}
case choice_GeneralName_uniformResourceIdentifier:
strpool = rk_strpoolprintf(strpool, "URI: %.*s",
(int)name->u.uniformResourceIdentifier.length,
(char *)name->u.uniformResourceIdentifier.data);
break;
case choice_GeneralName_iPAddress: {
unsigned char *a = name->u.iPAddress.data;
strpool = rk_strpoolprintf(strpool, "IPAddress: ");
if (strpool == NULL)
break;
if (name->u.iPAddress.length == 4)
strpool = rk_strpoolprintf(strpool, "%d.%d.%d.%d",
a[0], a[1], a[2], a[3]);
else if (name->u.iPAddress.length == 16)
strpool = rk_strpoolprintf(strpool,
"%02X:%02X:%02X:%02X:"
"%02X:%02X:%02X:%02X:"
"%02X:%02X:%02X:%02X:"
"%02X:%02X:%02X:%02X",
a[0], a[1], a[2], a[3],
a[4], a[5], a[6], a[7],
a[8], a[9], a[10], a[11],
a[12], a[13], a[14], a[15]);
else
strpool = rk_strpoolprintf(strpool,
"unknown IP address of length %lu",
(unsigned long)name->u.iPAddress.length);
break;
}
case choice_GeneralName_registeredID: {
char *oid;
hx509_oid_sprint(&name->u.registeredID, &oid);
if (oid == NULL)
return ENOMEM;
strpool = rk_strpoolprintf(strpool, "registeredID: %s", oid);
free(oid);
break;
}
default:
return EINVAL;
}
if (strpool == NULL ||
(*str = rk_strpoolcollect(strpool)) == NULL)
return ENOMEM;
return 0;
}
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