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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "cert.h"
#include "secoid.h"
#include "secder.h" /* XXX remove this when remove the DERTemplates */
#include "secasn1.h"
#include "secitem.h"
#include <stdarg.h>
#include "secerr.h"
#include "certi.h"
static const SEC_ASN1Template cert_AVATemplate[] = {
{ SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTAVA) },
{ SEC_ASN1_OBJECT_ID, offsetof(CERTAVA, type) },
{ SEC_ASN1_ANY, offsetof(CERTAVA, value) },
{ 0 }
};
const SEC_ASN1Template CERT_RDNTemplate[] = {
{ SEC_ASN1_SET_OF, offsetof(CERTRDN, avas), cert_AVATemplate,
sizeof(CERTRDN) }
};
static int
CountArray(void **array)
{
int count = 0;
if (array) {
while (*array++) {
count++;
}
}
return count;
}
static void **
AddToArray(PLArenaPool *arena, void **array, void *element)
{
unsigned count;
void **ap;
/* Count up number of slots already in use in the array */
count = 0;
ap = array;
if (ap) {
while (*ap++) {
count++;
}
}
if (array) {
array =
(void **)PORT_ArenaGrow(arena, array, (count + 1) * sizeof(void *),
(count + 2) * sizeof(void *));
} else {
array = (void **)PORT_ArenaAlloc(arena, (count + 2) * sizeof(void *));
}
if (array) {
array[count] = element;
array[count + 1] = 0;
}
return array;
}
SECOidTag
CERT_GetAVATag(CERTAVA *ava)
{
SECOidData *oid;
if (!ava->type.data)
return (SECOidTag)-1;
oid = SECOID_FindOID(&ava->type);
if (oid) {
return (oid->offset);
}
return (SECOidTag)-1;
}
static SECStatus
SetupAVAType(PLArenaPool *arena, SECOidTag type, SECItem *it, unsigned *maxLenp)
{
unsigned char *oid;
unsigned oidLen;
unsigned char *cp;
int maxLen;
SECOidData *oidrec;
oidrec = SECOID_FindOIDByTag(type);
if (oidrec == NULL)
return SECFailure;
oid = oidrec->oid.data;
oidLen = oidrec->oid.len;
maxLen = cert_AVAOidTagToMaxLen(type);
if (maxLen < 0) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
it->data = cp = (unsigned char *)PORT_ArenaAlloc(arena, oidLen);
if (cp == NULL) {
return SECFailure;
}
it->len = oidLen;
PORT_Memcpy(cp, oid, oidLen);
*maxLenp = (unsigned)maxLen;
return SECSuccess;
}
static SECStatus
SetupAVAValue(PLArenaPool *arena, int valueType, const SECItem *in,
SECItem *out, unsigned maxLen)
{
PRUint8 *value, *cp, *ucs4Val;
unsigned valueLen, valueLenLen, total;
unsigned ucs4Len = 0, ucs4MaxLen;
value = in->data;
valueLen = in->len;
switch (valueType) {
case SEC_ASN1_PRINTABLE_STRING:
case SEC_ASN1_IA5_STRING:
case SEC_ASN1_T61_STRING:
case SEC_ASN1_UTF8_STRING: /* no conversion required */
break;
case SEC_ASN1_UNIVERSAL_STRING:
ucs4MaxLen = valueLen * 6;
ucs4Val = (PRUint8 *)PORT_ArenaZAlloc(arena, ucs4MaxLen);
if (!ucs4Val ||
!PORT_UCS4_UTF8Conversion(PR_TRUE, value, valueLen, ucs4Val,
ucs4MaxLen, &ucs4Len)) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
value = ucs4Val;
valueLen = ucs4Len;
maxLen *= 4;
break;
default:
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
if (valueLen > maxLen) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
valueLenLen = DER_LengthLength(valueLen);
total = 1 + valueLenLen + valueLen;
cp = (PRUint8 *)PORT_ArenaAlloc(arena, total);
if (!cp) {
return SECFailure;
}
out->data = cp;
out->len = total;
cp = (PRUint8 *)DER_StoreHeader(cp, valueType, valueLen);
PORT_Memcpy(cp, value, valueLen);
return SECSuccess;
}
CERTAVA *
CERT_CreateAVAFromRaw(PLArenaPool *pool, const SECItem *OID,
const SECItem *value)
{
CERTAVA *ava;
int rv;
ava = PORT_ArenaZNew(pool, CERTAVA);
if (ava) {
rv = SECITEM_CopyItem(pool, &ava->type, OID);
if (rv)
return NULL;
rv = SECITEM_CopyItem(pool, &ava->value, value);
if (rv)
return NULL;
}
return ava;
}
CERTAVA *
CERT_CreateAVAFromSECItem(PLArenaPool *arena, SECOidTag kind, int valueType,
SECItem *value)
{
CERTAVA *ava;
int rv;
unsigned maxLen;
ava = (CERTAVA *)PORT_ArenaZAlloc(arena, sizeof(CERTAVA));
if (ava) {
rv = SetupAVAType(arena, kind, &ava->type, &maxLen);
if (rv) {
/* Illegal AVA type */
return NULL;
}
rv = SetupAVAValue(arena, valueType, value, &ava->value, maxLen);
if (rv) {
/* Illegal value type */
return NULL;
}
}
return ava;
}
CERTAVA *
CERT_CreateAVA(PLArenaPool *arena, SECOidTag kind, int valueType, char *value)
{
SECItem item = { siBuffer, NULL, 0 };
item.data = (PRUint8 *)value;
item.len = PORT_Strlen(value);
return CERT_CreateAVAFromSECItem(arena, kind, valueType, &item);
}
CERTAVA *
CERT_CopyAVA(PLArenaPool *arena, CERTAVA *from)
{
CERTAVA *ava;
int rv;
ava = (CERTAVA *)PORT_ArenaZAlloc(arena, sizeof(CERTAVA));
if (ava) {
rv = SECITEM_CopyItem(arena, &ava->type, &from->type);
if (rv)
goto loser;
rv = SECITEM_CopyItem(arena, &ava->value, &from->value);
if (rv)
goto loser;
}
return ava;
loser:
return 0;
}
CERTRDN *
CERT_CreateRDN(PLArenaPool *arena, CERTAVA *ava0, ...)
{
CERTAVA *ava;
CERTRDN *rdn;
va_list ap;
unsigned count;
CERTAVA **avap;
rdn = (CERTRDN *)PORT_ArenaAlloc(arena, sizeof(CERTRDN));
if (rdn) {
/* Count number of avas going into the rdn */
count = 0;
if (ava0) {
count++;
va_start(ap, ava0);
while (va_arg(ap, CERTAVA *) != 0) {
count++;
}
va_end(ap);
}
/* Now fill in the pointers */
rdn->avas = avap =
(CERTAVA **)PORT_ArenaAlloc(arena, (count + 1) * sizeof(CERTAVA *));
if (!avap) {
return 0;
}
if (ava0) {
*avap++ = ava0;
va_start(ap, ava0);
while ((ava = va_arg(ap, CERTAVA *)) != 0) {
*avap++ = ava;
}
va_end(ap);
}
*avap++ = 0;
}
return rdn;
}
SECStatus
CERT_AddAVA(PLArenaPool *arena, CERTRDN *rdn, CERTAVA *ava)
{
rdn->avas = (CERTAVA **)AddToArray(arena, (void **)rdn->avas, ava);
return rdn->avas ? SECSuccess : SECFailure;
}
SECStatus
CERT_CopyRDN(PLArenaPool *arena, CERTRDN *to, CERTRDN *from)
{
CERTAVA **avas, *fava, *tava;
SECStatus rv = SECSuccess;
/* Copy each ava from from */
avas = from->avas;
if (avas) {
if (avas[0] == NULL) {
rv = CERT_AddAVA(arena, to, NULL);
return rv;
}
while ((fava = *avas++) != 0) {
tava = CERT_CopyAVA(arena, fava);
if (!tava) {
rv = SECFailure;
break;
}
rv = CERT_AddAVA(arena, to, tava);
if (rv != SECSuccess)
break;
}
}
return rv;
}
/************************************************************************/
const SEC_ASN1Template CERT_NameTemplate[] = {
{ SEC_ASN1_SEQUENCE_OF, offsetof(CERTName, rdns), CERT_RDNTemplate,
sizeof(CERTName) }
};
SEC_ASN1_CHOOSER_IMPLEMENT(CERT_NameTemplate)
CERTName *
CERT_CreateName(CERTRDN *rdn0, ...)
{
CERTRDN *rdn;
CERTName *name;
va_list ap;
unsigned count;
CERTRDN **rdnp;
PLArenaPool *arena;
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (!arena) {
return (0);
}
name = (CERTName *)PORT_ArenaAlloc(arena, sizeof(CERTName));
if (name) {
name->arena = arena;
/* Count number of RDNs going into the Name */
if (!rdn0) {
count = 0;
} else {
count = 1;
va_start(ap, rdn0);
while (va_arg(ap, CERTRDN *) != 0) {
count++;
}
va_end(ap);
}
/* Allocate space (including space for terminal null ptr) */
name->rdns = rdnp =
(CERTRDN **)PORT_ArenaAlloc(arena, (count + 1) * sizeof(CERTRDN *));
if (!name->rdns) {
goto loser;
}
/* Now fill in the pointers */
if (count > 0) {
*rdnp++ = rdn0;
va_start(ap, rdn0);
while ((rdn = va_arg(ap, CERTRDN *)) != 0) {
*rdnp++ = rdn;
}
va_end(ap);
}
/* null terminate the list */
*rdnp++ = 0;
}
return name;
loser:
PORT_FreeArena(arena, PR_FALSE);
return (0);
}
void
CERT_DestroyName(CERTName *name)
{
if (name) {
PLArenaPool *arena = name->arena;
name->rdns = NULL;
name->arena = NULL;
if (arena)
PORT_FreeArena(arena, PR_FALSE);
}
}
SECStatus
CERT_AddRDN(CERTName *name, CERTRDN *rdn)
{
name->rdns = (CERTRDN **)AddToArray(name->arena, (void **)name->rdns, rdn);
return name->rdns ? SECSuccess : SECFailure;
}
SECStatus
CERT_CopyName(PLArenaPool *arena, CERTName *to, const CERTName *from)
{
CERTRDN **rdns, *frdn, *trdn;
SECStatus rv = SECSuccess;
if (!to || !from) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
CERT_DestroyName(to);
to->arena = arena;
/* Copy each rdn from from */
rdns = from->rdns;
if (rdns) {
if (rdns[0] == NULL) {
rv = CERT_AddRDN(to, NULL);
return rv;
}
while ((frdn = *rdns++) != NULL) {
trdn = CERT_CreateRDN(arena, NULL);
if (!trdn) {
rv = SECFailure;
break;
}
rv = CERT_CopyRDN(arena, trdn, frdn);
if (rv != SECSuccess)
break;
rv = CERT_AddRDN(to, trdn);
if (rv != SECSuccess)
break;
}
}
return rv;
}
/************************************************************************/
static void
canonicalize(SECItem *foo)
{
int ch, lastch, len, src, dest;
/* strip trailing whitespace. */
len = foo->len;
while (len > 0 && ((ch = foo->data[len - 1]) == ' ' || ch == '\t' ||
ch == '\r' || ch == '\n')) {
len--;
}
src = 0;
/* strip leading whitespace. */
while (src < len && ((ch = foo->data[src]) == ' ' || ch == '\t' ||
ch == '\r' || ch == '\n')) {
src++;
}
dest = 0;
lastch = ' ';
while (src < len) {
ch = foo->data[src++];
if (ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n') {
ch = ' ';
if (ch == lastch)
continue;
} else if (ch >= 'A' && ch <= 'Z') {
ch |= 0x20; /* downshift */
}
foo->data[dest++] = lastch = ch;
}
foo->len = dest;
}
/* SECItems a and b contain DER-encoded printable strings. */
SECComparison
CERT_CompareDERPrintableStrings(const SECItem *a, const SECItem *b)
{
SECComparison rv = SECLessThan;
SECItem *aVal = CERT_DecodeAVAValue(a);
SECItem *bVal = CERT_DecodeAVAValue(b);
if (aVal && aVal->len && aVal->data && bVal && bVal->len && bVal->data) {
canonicalize(aVal);
canonicalize(bVal);
rv = SECITEM_CompareItem(aVal, bVal);
}
SECITEM_FreeItem(aVal, PR_TRUE);
SECITEM_FreeItem(bVal, PR_TRUE);
return rv;
}
SECComparison
CERT_CompareAVA(const CERTAVA *a, const CERTAVA *b)
{
SECComparison rv;
rv = SECITEM_CompareItem(&a->type, &b->type);
if (SECEqual != rv)
return rv; /* Attribute types don't match. */
/* Let's be optimistic. Maybe the values will just compare equal. */
rv = SECITEM_CompareItem(&a->value, &b->value);
if (SECEqual == rv)
return rv; /* values compared exactly. */
if (a->value.len && a->value.data && b->value.len && b->value.data) {
/* Here, the values did not match.
** If the values had different encodings, convert them to the same
** encoding and compare that way.
*/
if (a->value.data[0] != b->value.data[0]) {
/* encodings differ. Convert both to UTF-8 and compare. */
SECItem *aVal = CERT_DecodeAVAValue(&a->value);
SECItem *bVal = CERT_DecodeAVAValue(&b->value);
if (aVal && aVal->len && aVal->data && bVal && bVal->len &&
bVal->data) {
rv = SECITEM_CompareItem(aVal, bVal);
}
SECITEM_FreeItem(aVal, PR_TRUE);
SECITEM_FreeItem(bVal, PR_TRUE);
} else if (a->value.data[0] == 0x13) { /* both are printable strings. */
/* printable strings */
rv = CERT_CompareDERPrintableStrings(&a->value, &b->value);
}
}
return rv;
}
SECComparison
CERT_CompareRDN(const CERTRDN *a, const CERTRDN *b)
{
CERTAVA **aavas, *aava;
CERTAVA **bavas, *bava;
int ac, bc;
SECComparison rv = SECEqual;
aavas = a->avas;
bavas = b->avas;
/*
** Make sure array of ava's are the same length. If not, then we are
** not equal
*/
ac = CountArray((void **)aavas);
bc = CountArray((void **)bavas);
if (ac < bc)
return SECLessThan;
if (ac > bc)
return SECGreaterThan;
while (NULL != (aava = *aavas++)) {
for (bavas = b->avas; NULL != (bava = *bavas++);) {
rv = SECITEM_CompareItem(&aava->type, &bava->type);
if (SECEqual == rv) {
rv = CERT_CompareAVA(aava, bava);
if (SECEqual != rv)
return rv;
break;
}
}
if (!bava) /* didn't find a match */
return SECGreaterThan;
}
return rv;
}
SECComparison
CERT_CompareName(const CERTName *a, const CERTName *b)
{
CERTRDN **ardns;
CERTRDN **brdns;
int ac, bc;
SECComparison rv = SECEqual;
ardns = a->rdns;
brdns = b->rdns;
/*
** Make sure array of rdn's are the same length. If not, then we are
** not equal
*/
ac = CountArray((void **)ardns);
bc = CountArray((void **)brdns);
if (ac < bc)
return SECLessThan;
if (ac > bc)
return SECGreaterThan;
while (rv == SECEqual && *ardns) {
rv = CERT_CompareRDN(*ardns++, *brdns++);
}
return rv;
}
/* Moved from certhtml.c */
SECItem *
CERT_DecodeAVAValue(const SECItem *derAVAValue)
{
SECItem *retItem;
const SEC_ASN1Template *theTemplate = NULL;
enum { conv_none,
conv_ucs4,
conv_ucs2,
conv_iso88591 } convert = conv_none;
SECItem avaValue = { siBuffer, 0 };
PORTCheapArenaPool tmpArena;
if (!derAVAValue || !derAVAValue->len || !derAVAValue->data) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return NULL;
}
switch (derAVAValue->data[0]) {
case SEC_ASN1_UNIVERSAL_STRING:
convert = conv_ucs4;
theTemplate = SEC_ASN1_GET(SEC_UniversalStringTemplate);
break;
case SEC_ASN1_IA5_STRING:
theTemplate = SEC_ASN1_GET(SEC_IA5StringTemplate);
break;
case SEC_ASN1_PRINTABLE_STRING:
theTemplate = SEC_ASN1_GET(SEC_PrintableStringTemplate);
break;
case SEC_ASN1_T61_STRING:
/*
* Per common practice, we're not decoding actual T.61, but instead
* treating T61-labeled strings as containing ISO-8859-1.
*/
convert = conv_iso88591;
theTemplate = SEC_ASN1_GET(SEC_T61StringTemplate);
break;
case SEC_ASN1_BMP_STRING:
convert = conv_ucs2;
theTemplate = SEC_ASN1_GET(SEC_BMPStringTemplate);
break;
case SEC_ASN1_UTF8_STRING:
/* No conversion needed ! */
theTemplate = SEC_ASN1_GET(SEC_UTF8StringTemplate);
break;
default:
PORT_SetError(SEC_ERROR_INVALID_AVA);
return NULL;
}
PORT_Memset(&avaValue, 0, sizeof(SECItem));
PORT_InitCheapArena(&tmpArena, DER_DEFAULT_CHUNKSIZE);
if (SEC_QuickDERDecodeItem(&tmpArena.arena, &avaValue, theTemplate,
derAVAValue) != SECSuccess) {
PORT_DestroyCheapArena(&tmpArena);
return NULL;
}
if (convert != conv_none) {
unsigned int utf8ValLen = avaValue.len * 3;
unsigned char *utf8Val =
(unsigned char *)PORT_ArenaZAlloc(&tmpArena.arena, utf8ValLen);
switch (convert) {
case conv_ucs4:
if (avaValue.len % 4 != 0 ||
!PORT_UCS4_UTF8Conversion(PR_FALSE, avaValue.data,
avaValue.len, utf8Val, utf8ValLen,
&utf8ValLen)) {
PORT_DestroyCheapArena(&tmpArena);
PORT_SetError(SEC_ERROR_INVALID_AVA);
return NULL;
}
break;
case conv_ucs2:
if (avaValue.len % 2 != 0 ||
!PORT_UCS2_UTF8Conversion(PR_FALSE, avaValue.data,
avaValue.len, utf8Val, utf8ValLen,
&utf8ValLen)) {
PORT_DestroyCheapArena(&tmpArena);
PORT_SetError(SEC_ERROR_INVALID_AVA);
return NULL;
}
break;
case conv_iso88591:
if (!PORT_ISO88591_UTF8Conversion(avaValue.data, avaValue.len,
utf8Val, utf8ValLen,
&utf8ValLen)) {
PORT_DestroyCheapArena(&tmpArena);
PORT_SetError(SEC_ERROR_INVALID_AVA);
return NULL;
}
break;
case conv_none:
PORT_Assert(0); /* not reached */
break;
}
avaValue.data = utf8Val;
avaValue.len = utf8ValLen;
}
retItem = SECITEM_DupItem(&avaValue);
PORT_DestroyCheapArena(&tmpArena);
return retItem;
}