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a4e283f567
RetroZilla/security/nss/lib/certdb/genname.c
roytam1 a572ea8ca3 cherry-picked mozilla NSS upstream changes (to rev 82de44ead36f, which is on par with 3.18): 
bug1095307, bug1073330(backout), bug1084986, bug1050069, bug942172, bug1054547, bug532081, bug1096348, bug1058870, bug1093940, bug1102985, bug1112461, bug1094492, bug112029, bug1119983, bug1120685, bug1120691, bug1113632, bug863076, bug1082973, bug1124539, bug1117617, bug1117621, bug1121273, bug753136, bug921684, bug1132818, bug1125375, bug647690, bug1055441, bug1134455, bug975010, bug950369, bug1128367, bug1129573, bug1136095, bug1117897, bug1113453, bug1061725, bug1073330, bug1111901, bug1083900, bug1136095, bug1138820, bug1096741, bug1134548, bug345725, bug950348, bug950344, bug1151037, bug991783, bug1153994
2018-07-14 21:22:30 +08:00

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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "plarena.h"
#include "seccomon.h"
#include "secitem.h"
#include "secoidt.h"
#include "secasn1.h"
#include "secder.h"
#include "certt.h"
#include "cert.h"
#include "certi.h"
#include "xconst.h"
#include "secerr.h"
#include "secoid.h"
#include "prprf.h"
#include "genname.h"
SEC_ASN1_MKSUB(SEC_AnyTemplate)
SEC_ASN1_MKSUB(SEC_IntegerTemplate)
SEC_ASN1_MKSUB(SEC_IA5StringTemplate)
SEC_ASN1_MKSUB(SEC_ObjectIDTemplate)
SEC_ASN1_MKSUB(SEC_OctetStringTemplate)
static const SEC_ASN1Template CERTNameConstraintTemplate[] = {
{ SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTNameConstraint) },
{ SEC_ASN1_ANY, offsetof(CERTNameConstraint, DERName) },
{ SEC_ASN1_OPTIONAL | SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 0,
offsetof(CERTNameConstraint, min),
SEC_ASN1_SUB(SEC_IntegerTemplate) },
{ SEC_ASN1_OPTIONAL | SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 1,
offsetof(CERTNameConstraint, max),
SEC_ASN1_SUB(SEC_IntegerTemplate) },
{ 0, }
};
const SEC_ASN1Template CERT_NameConstraintSubtreeSubTemplate[] = {
{ SEC_ASN1_SEQUENCE_OF | SEC_ASN1_XTRN, 0, SEC_ASN1_SUB(SEC_AnyTemplate) }
};
static const SEC_ASN1Template CERTNameConstraintsTemplate[] = {
{ SEC_ASN1_SEQUENCE, 0, NULL, sizeof(CERTNameConstraints) },
{ SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0,
offsetof(CERTNameConstraints, DERPermited),
CERT_NameConstraintSubtreeSubTemplate},
{ SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 1,
offsetof(CERTNameConstraints, DERExcluded),
CERT_NameConstraintSubtreeSubTemplate},
{ 0, }
};
static const SEC_ASN1Template CERTOthNameTemplate[] = {
{ SEC_ASN1_SEQUENCE, 0, NULL, sizeof(OtherName) },
{ SEC_ASN1_OBJECT_ID,
offsetof(OtherName, oid) },
{ SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_CONSTRUCTED | SEC_ASN1_EXPLICIT |
SEC_ASN1_XTRN | 0, offsetof(OtherName, name),
SEC_ASN1_SUB(SEC_AnyTemplate) },
{ 0, }
};
static const SEC_ASN1Template CERTOtherNameTemplate[] = {
{ SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_CONSTRUCTED | 0 ,
offsetof(CERTGeneralName, name.OthName), CERTOthNameTemplate,
sizeof(CERTGeneralName) }
};
static const SEC_ASN1Template CERTOtherName2Template[] = {
{ SEC_ASN1_SEQUENCE | SEC_ASN1_CONTEXT_SPECIFIC | 0 ,
0, NULL, sizeof(CERTGeneralName) },
{ SEC_ASN1_OBJECT_ID,
offsetof(CERTGeneralName, name.OthName) + offsetof(OtherName, oid) },
{ SEC_ASN1_ANY,
offsetof(CERTGeneralName, name.OthName) + offsetof(OtherName, name) },
{ 0, }
};
static const SEC_ASN1Template CERT_RFC822NameTemplate[] = {
{ SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 1 ,
offsetof(CERTGeneralName, name.other),
SEC_ASN1_SUB(SEC_IA5StringTemplate),
sizeof (CERTGeneralName)}
};
static const SEC_ASN1Template CERT_DNSNameTemplate[] = {
{ SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 2 ,
offsetof(CERTGeneralName, name.other),
SEC_ASN1_SUB(SEC_IA5StringTemplate),
sizeof (CERTGeneralName)}
};
static const SEC_ASN1Template CERT_X400AddressTemplate[] = {
{ SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_CONSTRUCTED | SEC_ASN1_XTRN | 3,
offsetof(CERTGeneralName, name.other), SEC_ASN1_SUB(SEC_AnyTemplate),
sizeof (CERTGeneralName)}
};
static const SEC_ASN1Template CERT_DirectoryNameTemplate[] = {
{ SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_CONSTRUCTED | SEC_ASN1_EXPLICIT |
SEC_ASN1_XTRN | 4, offsetof(CERTGeneralName, derDirectoryName),
SEC_ASN1_SUB(SEC_AnyTemplate), sizeof (CERTGeneralName)}
};
static const SEC_ASN1Template CERT_EDIPartyNameTemplate[] = {
{ SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_CONSTRUCTED | SEC_ASN1_XTRN | 5,
offsetof(CERTGeneralName, name.other), SEC_ASN1_SUB(SEC_AnyTemplate),
sizeof (CERTGeneralName)}
};
static const SEC_ASN1Template CERT_URITemplate[] = {
{ SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 6 ,
offsetof(CERTGeneralName, name.other),
SEC_ASN1_SUB(SEC_IA5StringTemplate),
sizeof (CERTGeneralName)}
};
static const SEC_ASN1Template CERT_IPAddressTemplate[] = {
{ SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 7 ,
offsetof(CERTGeneralName, name.other),
SEC_ASN1_SUB(SEC_OctetStringTemplate),
sizeof (CERTGeneralName)}
};
static const SEC_ASN1Template CERT_RegisteredIDTemplate[] = {
{ SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 8 ,
offsetof(CERTGeneralName, name.other),
SEC_ASN1_SUB(SEC_ObjectIDTemplate),
sizeof (CERTGeneralName)}
};
const SEC_ASN1Template CERT_GeneralNamesTemplate[] = {
{ SEC_ASN1_SEQUENCE_OF | SEC_ASN1_XTRN , 0, SEC_ASN1_SUB(SEC_AnyTemplate) }
};
static struct {
CERTGeneralNameType type;
char *name;
} typesArray[] = {
{ certOtherName, "other" },
{ certRFC822Name, "email" },
{ certRFC822Name, "rfc822" },
{ certDNSName, "dns" },
{ certX400Address, "x400" },
{ certX400Address, "x400addr" },
{ certDirectoryName, "directory" },
{ certDirectoryName, "dn" },
{ certEDIPartyName, "edi" },
{ certEDIPartyName, "ediparty" },
{ certURI, "uri" },
{ certIPAddress, "ip" },
{ certIPAddress, "ipaddr" },
{ certRegisterID, "registerid" }
};
CERTGeneralNameType
CERT_GetGeneralNameTypeFromString(const char *string)
{
int types_count = sizeof(typesArray)/sizeof(typesArray[0]);
int i;
for (i=0; i < types_count; i++) {
if (PORT_Strcasecmp(string, typesArray[i].name) == 0) {
return typesArray[i].type;
}
}
return 0;
}
CERTGeneralName *
CERT_NewGeneralName(PLArenaPool *arena, CERTGeneralNameType type)
{
CERTGeneralName *name = arena
? PORT_ArenaZNew(arena, CERTGeneralName)
: PORT_ZNew(CERTGeneralName);
if (name) {
name->type = type;
name->l.prev = name->l.next = &name->l;
}
return name;
}
/* Copy content of one General Name to another.
** Caller has allocated destination general name.
** This function does not change the destinate's GeneralName's list linkage.
*/
SECStatus
cert_CopyOneGeneralName(PLArenaPool *arena,
CERTGeneralName *dest,
CERTGeneralName *src)
{
SECStatus rv;
void *mark = NULL;
PORT_Assert(dest != NULL);
dest->type = src->type;
mark = PORT_ArenaMark(arena);
switch (src->type) {
case certDirectoryName:
rv = SECITEM_CopyItem(arena, &dest->derDirectoryName,
&src->derDirectoryName);
if (rv == SECSuccess)
rv = CERT_CopyName(arena, &dest->name.directoryName,
&src->name.directoryName);
break;
case certOtherName:
rv = SECITEM_CopyItem(arena, &dest->name.OthName.name,
&src->name.OthName.name);
if (rv == SECSuccess)
rv = SECITEM_CopyItem(arena, &dest->name.OthName.oid,
&src->name.OthName.oid);
break;
default:
rv = SECITEM_CopyItem(arena, &dest->name.other,
&src->name.other);
break;
}
if (rv != SECSuccess) {
PORT_ArenaRelease(arena, mark);
} else {
PORT_ArenaUnmark(arena, mark);
}
return rv;
}
void
CERT_DestroyGeneralNameList(CERTGeneralNameList *list)
{
PZLock *lock;
if (list != NULL) {
lock = list->lock;
PZ_Lock(lock);
if (--list->refCount <= 0 && list->arena != NULL) {
PORT_FreeArena(list->arena, PR_FALSE);
PZ_Unlock(lock);
PZ_DestroyLock(lock);
} else {
PZ_Unlock(lock);
}
}
return;
}
CERTGeneralNameList *
CERT_CreateGeneralNameList(CERTGeneralName *name) {
PLArenaPool *arena;
CERTGeneralNameList *list = NULL;
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (arena == NULL) {
goto done;
}
list = PORT_ArenaZNew(arena, CERTGeneralNameList);
if (!list)
goto loser;
if (name != NULL) {
SECStatus rv;
list->name = CERT_NewGeneralName(arena, (CERTGeneralNameType)0);
if (!list->name)
goto loser;
rv = CERT_CopyGeneralName(arena, list->name, name);
if (rv != SECSuccess)
goto loser;
}
list->lock = PZ_NewLock(nssILockList);
if (!list->lock)
goto loser;
list->arena = arena;
list->refCount = 1;
done:
return list;
loser:
PORT_FreeArena(arena, PR_FALSE);
return NULL;
}
CERTGeneralName *
CERT_GetNextGeneralName(CERTGeneralName *current)
{
PRCList *next;
next = current->l.next;
return (CERTGeneralName *) (((char *) next) - offsetof(CERTGeneralName, l));
}
CERTGeneralName *
CERT_GetPrevGeneralName(CERTGeneralName *current)
{
PRCList *prev;
prev = current->l.prev;
return (CERTGeneralName *) (((char *) prev) - offsetof(CERTGeneralName, l));
}
CERTNameConstraint *
CERT_GetNextNameConstraint(CERTNameConstraint *current)
{
PRCList *next;
next = current->l.next;
return (CERTNameConstraint *) (((char *) next) - offsetof(CERTNameConstraint, l));
}
CERTNameConstraint *
CERT_GetPrevNameConstraint(CERTNameConstraint *current)
{
PRCList *prev;
prev = current->l.prev;
return (CERTNameConstraint *) (((char *) prev) - offsetof(CERTNameConstraint, l));
}
SECItem *
CERT_EncodeGeneralName(CERTGeneralName *genName, SECItem *dest, PLArenaPool *arena)
{
const SEC_ASN1Template * template;
PORT_Assert(arena);
if (arena == NULL) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return NULL;
}
/* TODO: mark arena */
if (dest == NULL) {
dest = PORT_ArenaZNew(arena, SECItem);
if (!dest)
goto loser;
}
if (genName->type == certDirectoryName) {
if (genName->derDirectoryName.data == NULL) {
/* The field hasn't been encoded yet. */
SECItem * pre_dest =
SEC_ASN1EncodeItem (arena, &(genName->derDirectoryName),
&(genName->name.directoryName),
CERT_NameTemplate);
if (!pre_dest)
goto loser;
}
if (genName->derDirectoryName.data == NULL) {
goto loser;
}
}
switch (genName->type) {
case certURI: template = CERT_URITemplate; break;
case certRFC822Name: template = CERT_RFC822NameTemplate; break;
case certDNSName: template = CERT_DNSNameTemplate; break;
case certIPAddress: template = CERT_IPAddressTemplate; break;
case certOtherName: template = CERTOtherNameTemplate; break;
case certRegisterID: template = CERT_RegisteredIDTemplate; break;
/* for this type, we expect the value is already encoded */
case certEDIPartyName: template = CERT_EDIPartyNameTemplate; break;
/* for this type, we expect the value is already encoded */
case certX400Address: template = CERT_X400AddressTemplate; break;
case certDirectoryName: template = CERT_DirectoryNameTemplate; break;
default:
PORT_Assert(0); goto loser;
}
dest = SEC_ASN1EncodeItem(arena, dest, genName, template);
if (!dest) {
goto loser;
}
/* TODO: unmark arena */
return dest;
loser:
/* TODO: release arena back to mark */
return NULL;
}
SECItem **
cert_EncodeGeneralNames(PLArenaPool *arena, CERTGeneralName *names)
{
CERTGeneralName *current_name;
SECItem **items = NULL;
int count = 0;
int i;
PRCList *head;
PORT_Assert(arena);
/* TODO: mark arena */
current_name = names;
if (names != NULL) {
count = 1;
}
head = &(names->l);
while (current_name->l.next != head) {
current_name = CERT_GetNextGeneralName(current_name);
++count;
}
current_name = CERT_GetNextGeneralName(current_name);
items = PORT_ArenaNewArray(arena, SECItem *, count + 1);
if (items == NULL) {
goto loser;
}
for (i = 0; i < count; i++) {
items[i] = CERT_EncodeGeneralName(current_name, (SECItem *)NULL, arena);
if (items[i] == NULL) {
goto loser;
}
current_name = CERT_GetNextGeneralName(current_name);
}
items[i] = NULL;
/* TODO: unmark arena */
return items;
loser:
/* TODO: release arena to mark */
return NULL;
}
CERTGeneralName *
CERT_DecodeGeneralName(PLArenaPool *reqArena,
SECItem *encodedName,
CERTGeneralName *genName)
{
const SEC_ASN1Template * template;
CERTGeneralNameType genNameType;
SECStatus rv = SECSuccess;
SECItem* newEncodedName;
if (!reqArena) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return NULL;
}
/* make a copy for decoding so the data decoded with QuickDER doesn't
point to temporary memory */
newEncodedName = SECITEM_ArenaDupItem(reqArena, encodedName);
if (!newEncodedName) {
return NULL;
}
/* TODO: mark arena */
genNameType = (CERTGeneralNameType)((*(newEncodedName->data) & 0x0f) + 1);
if (genName == NULL) {
genName = CERT_NewGeneralName(reqArena, genNameType);
if (!genName)
goto loser;
} else {
genName->type = genNameType;
genName->l.prev = genName->l.next = &genName->l;
}
switch (genNameType) {
case certURI: template = CERT_URITemplate; break;
case certRFC822Name: template = CERT_RFC822NameTemplate; break;
case certDNSName: template = CERT_DNSNameTemplate; break;
case certIPAddress: template = CERT_IPAddressTemplate; break;
case certOtherName: template = CERTOtherNameTemplate; break;
case certRegisterID: template = CERT_RegisteredIDTemplate; break;
case certEDIPartyName: template = CERT_EDIPartyNameTemplate; break;
case certX400Address: template = CERT_X400AddressTemplate; break;
case certDirectoryName: template = CERT_DirectoryNameTemplate; break;
default:
goto loser;
}
rv = SEC_QuickDERDecodeItem(reqArena, genName, template, newEncodedName);
if (rv != SECSuccess)
goto loser;
if (genNameType == certDirectoryName) {
rv = SEC_QuickDERDecodeItem(reqArena, &(genName->name.directoryName),
CERT_NameTemplate,
&(genName->derDirectoryName));
if (rv != SECSuccess)
goto loser;
}
/* TODO: unmark arena */
return genName;
loser:
/* TODO: release arena to mark */
return NULL;
}
CERTGeneralName *
cert_DecodeGeneralNames (PLArenaPool *arena,
SECItem **encodedGenName)
{
PRCList *head = NULL;
PRCList *tail = NULL;
CERTGeneralName *currentName = NULL;
PORT_Assert(arena);
if (!encodedGenName || !arena) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return NULL;
}
/* TODO: mark arena */
while (*encodedGenName != NULL) {
currentName = CERT_DecodeGeneralName(arena, *encodedGenName, NULL);
if (currentName == NULL)
break;
if (head == NULL) {
head = &(currentName->l);
tail = head;
}
currentName->l.next = head;
currentName->l.prev = tail;
tail = head->prev = tail->next = &(currentName->l);
encodedGenName++;
}
if (currentName) {
/* TODO: unmark arena */
return CERT_GetNextGeneralName(currentName);
}
/* TODO: release arena to mark */
return NULL;
}
void
CERT_DestroyGeneralName(CERTGeneralName *name)
{
cert_DestroyGeneralNames(name);
}
SECStatus
cert_DestroyGeneralNames(CERTGeneralName *name)
{
CERTGeneralName *first;
CERTGeneralName *next = NULL;
first = name;
do {
next = CERT_GetNextGeneralName(name);
PORT_Free(name);
name = next;
} while (name != first);
return SECSuccess;
}
static SECItem *
cert_EncodeNameConstraint(CERTNameConstraint *constraint,
SECItem *dest,
PLArenaPool *arena)
{
PORT_Assert(arena);
if (dest == NULL) {
dest = PORT_ArenaZNew(arena, SECItem);
if (dest == NULL) {
return NULL;
}
}
CERT_EncodeGeneralName(&(constraint->name), &(constraint->DERName), arena);
dest = SEC_ASN1EncodeItem (arena, dest, constraint,
CERTNameConstraintTemplate);
return dest;
}
SECStatus
cert_EncodeNameConstraintSubTree(CERTNameConstraint *constraints,
PLArenaPool *arena,
SECItem ***dest,
PRBool permited)
{
CERTNameConstraint *current_constraint = constraints;
SECItem **items = NULL;
int count = 0;
int i;
PRCList *head;
PORT_Assert(arena);
/* TODO: mark arena */
if (constraints != NULL) {
count = 1;
}
head = &constraints->l;
while (current_constraint->l.next != head) {
current_constraint = CERT_GetNextNameConstraint(current_constraint);
++count;
}
current_constraint = CERT_GetNextNameConstraint(current_constraint);
items = PORT_ArenaZNewArray(arena, SECItem *, count + 1);
if (items == NULL) {
goto loser;
}
for (i = 0; i < count; i++) {
items[i] = cert_EncodeNameConstraint(current_constraint,
(SECItem *) NULL, arena);
if (items[i] == NULL) {
goto loser;
}
current_constraint = CERT_GetNextNameConstraint(current_constraint);
}
*dest = items;
if (*dest == NULL) {
goto loser;
}
/* TODO: unmark arena */
return SECSuccess;
loser:
/* TODO: release arena to mark */
return SECFailure;
}
SECStatus
cert_EncodeNameConstraints(CERTNameConstraints *constraints,
PLArenaPool *arena,
SECItem *dest)
{
SECStatus rv = SECSuccess;
PORT_Assert(arena);
/* TODO: mark arena */
if (constraints->permited != NULL) {
rv = cert_EncodeNameConstraintSubTree(constraints->permited, arena,
&constraints->DERPermited,
PR_TRUE);
if (rv == SECFailure) {
goto loser;
}
}
if (constraints->excluded != NULL) {
rv = cert_EncodeNameConstraintSubTree(constraints->excluded, arena,
&constraints->DERExcluded,
PR_FALSE);
if (rv == SECFailure) {
goto loser;
}
}
dest = SEC_ASN1EncodeItem(arena, dest, constraints,
CERTNameConstraintsTemplate);
if (dest == NULL) {
goto loser;
}
/* TODO: unmark arena */
return SECSuccess;
loser:
/* TODO: release arena to mark */
return SECFailure;
}
CERTNameConstraint *
cert_DecodeNameConstraint(PLArenaPool *reqArena,
SECItem *encodedConstraint)
{
CERTNameConstraint *constraint;
SECStatus rv = SECSuccess;
CERTGeneralName *temp;
SECItem* newEncodedConstraint;
if (!reqArena) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return NULL;
}
newEncodedConstraint = SECITEM_ArenaDupItem(reqArena, encodedConstraint);
if (!newEncodedConstraint) {
return NULL;
}
/* TODO: mark arena */
constraint = PORT_ArenaZNew(reqArena, CERTNameConstraint);
if (!constraint)
goto loser;
rv = SEC_QuickDERDecodeItem(reqArena, constraint,
CERTNameConstraintTemplate,
newEncodedConstraint);
if (rv != SECSuccess) {
goto loser;
}
temp = CERT_DecodeGeneralName(reqArena, &(constraint->DERName),
&(constraint->name));
if (temp != &(constraint->name)) {
goto loser;
}
/* ### sjlee: since the name constraint contains only one
* CERTGeneralName, the list within CERTGeneralName shouldn't
* point anywhere else. Otherwise, bad things will happen.
*/
constraint->name.l.prev = constraint->name.l.next = &(constraint->name.l);
/* TODO: unmark arena */
return constraint;
loser:
/* TODO: release arena back to mark */
return NULL;
}
CERTNameConstraint *
cert_DecodeNameConstraintSubTree(PLArenaPool *arena,
SECItem **subTree,
PRBool permited)
{
CERTNameConstraint *current = NULL;
CERTNameConstraint *first = NULL;
CERTNameConstraint *last = NULL;
int i = 0;
PORT_Assert(arena);
/* TODO: mark arena */
while (subTree[i] != NULL) {
current = cert_DecodeNameConstraint(arena, subTree[i]);
if (current == NULL) {
goto loser;
}
if (last == NULL) {
first = last = current;
}
current->l.prev = &(last->l);
current->l.next = last->l.next;
last->l.next = &(current->l);
i++;
}
first->l.prev = &(current->l);
/* TODO: unmark arena */
return first;
loser:
/* TODO: release arena back to mark */
return NULL;
}
CERTNameConstraints *
cert_DecodeNameConstraints(PLArenaPool *reqArena,
const SECItem *encodedConstraints)
{
CERTNameConstraints *constraints;
SECStatus rv;
SECItem* newEncodedConstraints;
if (!reqArena) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return NULL;
}
PORT_Assert(encodedConstraints);
newEncodedConstraints = SECITEM_ArenaDupItem(reqArena, encodedConstraints);
/* TODO: mark arena */
constraints = PORT_ArenaZNew(reqArena, CERTNameConstraints);
if (constraints == NULL) {
goto loser;
}
rv = SEC_QuickDERDecodeItem(reqArena, constraints,
CERTNameConstraintsTemplate,
newEncodedConstraints);
if (rv != SECSuccess) {
goto loser;
}
if (constraints->DERPermited != NULL &&
constraints->DERPermited[0] != NULL) {
constraints->permited =
cert_DecodeNameConstraintSubTree(reqArena,
constraints->DERPermited,
PR_TRUE);
if (constraints->permited == NULL) {
goto loser;
}
}
if (constraints->DERExcluded != NULL &&
constraints->DERExcluded[0] != NULL) {
constraints->excluded =
cert_DecodeNameConstraintSubTree(reqArena,
constraints->DERExcluded,
PR_FALSE);
if (constraints->excluded == NULL) {
goto loser;
}
}
/* TODO: unmark arena */
return constraints;
loser:
/* TODO: release arena back to mark */
return NULL;
}
/* Copy a chain of one or more general names to a destination chain.
** Caller has allocated at least the first destination GeneralName struct.
** Both source and destination chains are circular doubly-linked lists.
** The first source struct is copied to the first destination struct.
** If the source chain has more than one member, and the destination chain
** has only one member, then this function allocates new structs for all but
** the first copy from the arena and links them into the destination list.
** If the destination struct is part of a list with more than one member,
** then this function traverses both the source and destination lists,
** copying each source struct to the corresponding dest struct.
** In that case, the destination list MUST contain at least as many
** structs as the source list or some dest entries will be overwritten.
*/
SECStatus
CERT_CopyGeneralName(PLArenaPool *arena,
CERTGeneralName *dest,
CERTGeneralName *src)
{
SECStatus rv;
CERTGeneralName *destHead = dest;
CERTGeneralName *srcHead = src;
PORT_Assert(dest != NULL);
if (!dest) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
/* TODO: mark arena */
do {
rv = cert_CopyOneGeneralName(arena, dest, src);
if (rv != SECSuccess)
goto loser;
src = CERT_GetNextGeneralName(src);
/* if there is only one general name, we shouldn't do this */
if (src != srcHead) {
if (dest->l.next == &destHead->l) {
CERTGeneralName *temp;
temp = CERT_NewGeneralName(arena, (CERTGeneralNameType)0);
if (!temp)
goto loser;
temp->l.next = &destHead->l;
temp->l.prev = &dest->l;
destHead->l.prev = &temp->l;
dest->l.next = &temp->l;
dest = temp;
} else {
dest = CERT_GetNextGeneralName(dest);
}
}
} while (src != srcHead && rv == SECSuccess);
/* TODO: unmark arena */
return rv;
loser:
/* TODO: release back to mark */
return SECFailure;
}
CERTGeneralNameList *
CERT_DupGeneralNameList(CERTGeneralNameList *list)
{
if (list != NULL) {
PZ_Lock(list->lock);
list->refCount++;
PZ_Unlock(list->lock);
}
return list;
}
/* Allocate space and copy CERTNameConstraint from src to dest */
CERTNameConstraint *
CERT_CopyNameConstraint(PLArenaPool *arena,
CERTNameConstraint *dest,
CERTNameConstraint *src)
{
SECStatus rv;
/* TODO: mark arena */
if (dest == NULL) {
dest = PORT_ArenaZNew(arena, CERTNameConstraint);
if (!dest)
goto loser;
/* mark that it is not linked */
dest->name.l.prev = dest->name.l.next = &(dest->name.l);
}
rv = CERT_CopyGeneralName(arena, &dest->name, &src->name);
if (rv != SECSuccess) {
goto loser;
}
rv = SECITEM_CopyItem(arena, &dest->DERName, &src->DERName);
if (rv != SECSuccess) {
goto loser;
}
rv = SECITEM_CopyItem(arena, &dest->min, &src->min);
if (rv != SECSuccess) {
goto loser;
}
rv = SECITEM_CopyItem(arena, &dest->max, &src->max);
if (rv != SECSuccess) {
goto loser;
}
dest->l.prev = dest->l.next = &dest->l;
/* TODO: unmark arena */
return dest;
loser:
/* TODO: release arena to mark */
return NULL;
}
CERTGeneralName *
cert_CombineNamesLists(CERTGeneralName *list1, CERTGeneralName *list2)
{
PRCList *begin1;
PRCList *begin2;
PRCList *end1;
PRCList *end2;
if (list1 == NULL){
return list2;
} else if (list2 == NULL) {
return list1;
} else {
begin1 = &list1->l;
begin2 = &list2->l;
end1 = list1->l.prev;
end2 = list2->l.prev;
end1->next = begin2;
end2->next = begin1;
begin1->prev = end2;
begin2->prev = end1;
return list1;
}
}
CERTNameConstraint *
cert_CombineConstraintsLists(CERTNameConstraint *list1, CERTNameConstraint *list2)
{
PRCList *begin1;
PRCList *begin2;
PRCList *end1;
PRCList *end2;
if (list1 == NULL){
return list2;
} else if (list2 == NULL) {
return list1;
} else {
begin1 = &list1->l;
begin2 = &list2->l;
end1 = list1->l.prev;
end2 = list2->l.prev;
end1->next = begin2;
end2->next = begin1;
begin1->prev = end2;
begin2->prev = end1;
return list1;
}
}
/* Add a CERTNameConstraint to the CERTNameConstraint list */
CERTNameConstraint *
CERT_AddNameConstraint(CERTNameConstraint *list,
CERTNameConstraint *constraint)
{
PORT_Assert(constraint != NULL);
constraint->l.next = constraint->l.prev = &constraint->l;
list = cert_CombineConstraintsLists(list, constraint);
return list;
}
SECStatus
CERT_GetNameConstraintByType (CERTNameConstraint *constraints,
CERTGeneralNameType type,
CERTNameConstraint **returnList,
PLArenaPool *arena)
{
CERTNameConstraint *current = NULL;
void *mark = NULL;
*returnList = NULL;
if (!constraints)
return SECSuccess;
mark = PORT_ArenaMark(arena);
current = constraints;
do {
PORT_Assert(current->name.type);
if (current->name.type == type) {
CERTNameConstraint *temp;
temp = CERT_CopyNameConstraint(arena, NULL, current);
if (temp == NULL)
goto loser;
*returnList = CERT_AddNameConstraint(*returnList, temp);
}
current = CERT_GetNextNameConstraint(current);
} while (current != constraints);
PORT_ArenaUnmark(arena, mark);
return SECSuccess;
loser:
PORT_ArenaRelease(arena, mark);
return SECFailure;
}
void *
CERT_GetGeneralNameByType (CERTGeneralName *genNames,
CERTGeneralNameType type, PRBool derFormat)
{
CERTGeneralName *current;
if (!genNames)
return NULL;
current = genNames;
do {
if (current->type == type) {
switch (type) {
case certDNSName:
case certEDIPartyName:
case certIPAddress:
case certRegisterID:
case certRFC822Name:
case certX400Address:
case certURI:
return (void *)&current->name.other; /* SECItem * */
case certOtherName:
return (void *)&current->name.OthName; /* OthName * */
case certDirectoryName:
return derFormat
? (void *)&current->derDirectoryName /* SECItem * */
: (void *)&current->name.directoryName; /* CERTName * */
}
PORT_Assert(0);
return NULL;
}
current = CERT_GetNextGeneralName(current);
} while (current != genNames);
return NULL;
}
int
CERT_GetNamesLength(CERTGeneralName *names)
{
int length = 0;
CERTGeneralName *first;
first = names;
if (names != NULL) {
do {
length++;
names = CERT_GetNextGeneralName(names);
} while (names != first);
}
return length;
}
/* Creates new GeneralNames for any email addresses found in the
** input DN, and links them onto the list for the DN.
*/
SECStatus
cert_ExtractDNEmailAddrs(CERTGeneralName *name, PLArenaPool *arena)
{
CERTGeneralName *nameList = NULL;
const CERTRDN **nRDNs = (const CERTRDN **)(name->name.directoryName.rdns);
SECStatus rv = SECSuccess;
PORT_Assert(name->type == certDirectoryName);
if (name->type != certDirectoryName) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
/* TODO: mark arena */
while (nRDNs && *nRDNs) { /* loop over RDNs */
const CERTRDN *nRDN = *nRDNs++;
CERTAVA **nAVAs = nRDN->avas;
while (nAVAs && *nAVAs) { /* loop over AVAs */
int tag;
CERTAVA *nAVA = *nAVAs++;
tag = CERT_GetAVATag(nAVA);
if ( tag == SEC_OID_PKCS9_EMAIL_ADDRESS ||
tag == SEC_OID_RFC1274_MAIL) { /* email AVA */
CERTGeneralName *newName = NULL;
SECItem *avaValue = CERT_DecodeAVAValue(&nAVA->value);
if (!avaValue)
goto loser;
rv = SECFailure;
newName = CERT_NewGeneralName(arena, certRFC822Name);
if (newName) {
rv = SECITEM_CopyItem(arena, &newName->name.other, avaValue);
}
SECITEM_FreeItem(avaValue, PR_TRUE);
if (rv != SECSuccess)
goto loser;
nameList = cert_CombineNamesLists(nameList, newName);
} /* handle one email AVA */
} /* loop over AVAs */
} /* loop over RDNs */
/* combine new names with old one. */
name = cert_CombineNamesLists(name, nameList);
/* TODO: unmark arena */
return SECSuccess;
loser:
/* TODO: release arena back to mark */
return SECFailure;
}
/* Extract all names except Subject Common Name from a cert
** in preparation for a name constraints test.
*/
CERTGeneralName *
CERT_GetCertificateNames(CERTCertificate *cert, PLArenaPool *arena)
{
return CERT_GetConstrainedCertificateNames(cert, arena, PR_FALSE);
}
/* This function is called by CERT_VerifyCertChain to extract all
** names from a cert in preparation for a name constraints test.
*/
CERTGeneralName *
CERT_GetConstrainedCertificateNames(const CERTCertificate *cert,
PLArenaPool *arena,
PRBool includeSubjectCommonName)
{
CERTGeneralName *DN;
CERTGeneralName *SAN;
PRUint32 numDNSNames = 0;
SECStatus rv;
if (!arena) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return NULL;
}
/* TODO: mark arena */
DN = CERT_NewGeneralName(arena, certDirectoryName);
if (DN == NULL) {
goto loser;
}
rv = CERT_CopyName(arena, &DN->name.directoryName, &cert->subject);
if (rv != SECSuccess) {
goto loser;
}
rv = SECITEM_CopyItem(arena, &DN->derDirectoryName, &cert->derSubject);
if (rv != SECSuccess) {
goto loser;
}
/* Extract email addresses from DN, construct CERTGeneralName structs
** for them, add them to the name list
*/
rv = cert_ExtractDNEmailAddrs(DN, arena);
if (rv != SECSuccess)
goto loser;
/* Now extract any GeneralNames from the subject name names extension. */
SAN = cert_GetSubjectAltNameList(cert, arena);
if (SAN) {
numDNSNames = cert_CountDNSPatterns(SAN);
DN = cert_CombineNamesLists(DN, SAN);
}
if (!numDNSNames && includeSubjectCommonName) {
char *cn = CERT_GetCommonName(&cert->subject);
if (cn) {
CERTGeneralName *CN = CERT_NewGeneralName(arena, certDNSName);
if (CN) {
SECItem cnItem = {siBuffer, NULL, 0};
cnItem.data = (unsigned char *)cn;
cnItem.len = strlen(cn);
rv = SECITEM_CopyItem(arena, &CN->name.other, &cnItem);
if (rv == SECSuccess) {
DN = cert_CombineNamesLists(DN, CN);
}
}
PORT_Free(cn);
}
}
if (rv == SECSuccess) {
/* TODO: unmark arena */
return DN;
}
loser:
/* TODO: release arena to mark */
return NULL;
}
/* Returns SECSuccess if name matches constraint per RFC 3280 rules for
** URI name constraints. SECFailure otherwise.
** If the constraint begins with a dot, it is a domain name, otherwise
** It is a host name. Examples:
** Constraint Name Result
** ------------ --------------- --------
** foo.bar.com foo.bar.com matches
** foo.bar.com FoO.bAr.CoM matches
** foo.bar.com www.foo.bar.com no match
** foo.bar.com nofoo.bar.com no match
** .foo.bar.com www.foo.bar.com matches
** .foo.bar.com nofoo.bar.com no match
** .foo.bar.com foo.bar.com no match
** .foo.bar.com www..foo.bar.com no match
*/
static SECStatus
compareURIN2C(const SECItem *name, const SECItem *constraint)
{
int offset;
/* The spec is silent on intepreting zero-length constraints.
** We interpret them as matching no URI names.
*/
if (!constraint->len)
return SECFailure;
if (constraint->data[0] != '.') {
/* constraint is a host name. */
if (name->len != constraint->len ||
PL_strncasecmp((char *)name->data,
(char *)constraint->data, constraint->len))
return SECFailure;
return SECSuccess;
}
/* constraint is a domain name. */
if (name->len < constraint->len)
return SECFailure;
offset = name->len - constraint->len;
if (PL_strncasecmp((char *)(name->data + offset),
(char *)constraint->data, constraint->len))
return SECFailure;
if (!offset ||
(name->data[offset - 1] == '.') + (constraint->data[0] == '.') == 1)
return SECSuccess;
return SECFailure;
}
/* for DNSname constraints, RFC 3280 says, (section 4.2.1.11, page 38)
**
** DNS name restrictions are expressed as foo.bar.com. Any DNS name
** that can be constructed by simply adding to the left hand side of the
** name satisfies the name constraint. For example, www.foo.bar.com
** would satisfy the constraint but foo1.bar.com would not.
**
** But NIST's PKITS test suite requires that the constraint be treated
** as a domain name, and requires that any name added to the left hand
** side end in a dot ".". Sensible, but not strictly following the RFC.
**
** Constraint Name RFC 3280 NIST PKITS
** ------------ --------------- -------- ----------
** foo.bar.com foo.bar.com matches matches
** foo.bar.com FoO.bAr.CoM matches matches
** foo.bar.com www.foo.bar.com matches matches
** foo.bar.com nofoo.bar.com MATCHES NO MATCH
** .foo.bar.com www.foo.bar.com matches matches? disallowed?
** .foo.bar.com foo.bar.com no match no match
** .foo.bar.com www..foo.bar.com matches probably not
**
** We will try to conform to NIST's PKITS tests, and the unstated
** rules they imply.
*/
static SECStatus
compareDNSN2C(const SECItem *name, const SECItem *constraint)
{
int offset;
/* The spec is silent on intepreting zero-length constraints.
** We interpret them as matching all DNSnames.
*/
if (!constraint->len)
return SECSuccess;
if (name->len < constraint->len)
return SECFailure;
offset = name->len - constraint->len;
if (PL_strncasecmp((char *)(name->data + offset),
(char *)constraint->data, constraint->len))
return SECFailure;
if (!offset ||
(name->data[offset - 1] == '.') + (constraint->data[0] == '.') == 1)
return SECSuccess;
return SECFailure;
}
/* Returns SECSuccess if name matches constraint per RFC 3280 rules for
** internet email addresses. SECFailure otherwise.
** If constraint contains a '@' then the two strings much match exactly.
** Else if constraint starts with a '.'. then it must match the right-most
** substring of the name,
** else constraint string must match entire name after the name's '@'.
** Empty constraint string matches all names. All comparisons case insensitive.
*/
static SECStatus
compareRFC822N2C(const SECItem *name, const SECItem *constraint)
{
int offset;
if (!constraint->len)
return SECSuccess;
if (name->len < constraint->len)
return SECFailure;
if (constraint->len == 1 && constraint->data[0] == '.')
return SECSuccess;
for (offset = constraint->len - 1; offset >= 0; --offset) {
if (constraint->data[offset] == '@') {
return (name->len == constraint->len &&
!PL_strncasecmp((char *)name->data,
(char *)constraint->data, constraint->len))
? SECSuccess : SECFailure;
}
}
offset = name->len - constraint->len;
if (PL_strncasecmp((char *)(name->data + offset),
(char *)constraint->data, constraint->len))
return SECFailure;
if (constraint->data[0] == '.')
return SECSuccess;
if (offset > 0 && name->data[offset - 1] == '@')
return SECSuccess;
return SECFailure;
}
/* name contains either a 4 byte IPv4 address or a 16 byte IPv6 address.
** constraint contains an address of the same length, and a subnet mask
** of the same length. Compare name's address to the constraint's
** address, subject to the mask.
** Return SECSuccess if they match, SECFailure if they don't.
*/
static SECStatus
compareIPaddrN2C(const SECItem *name, const SECItem *constraint)
{
int i;
if (name->len == 4 && constraint->len == 8) { /* ipv4 addr */
for (i = 0; i < 4; i++) {
if ((name->data[i] ^ constraint->data[i]) & constraint->data[i+4])
goto loser;
}
return SECSuccess;
}
if (name->len == 16 && constraint->len == 32) { /* ipv6 addr */
for (i = 0; i < 16; i++) {
if ((name->data[i] ^ constraint->data[i]) & constraint->data[i+16])
goto loser;
}
return SECSuccess;
}
loser:
return SECFailure;
}
/* start with a SECItem that points to a URI. Parse it lookingg for
** a hostname. Modify item->data and item->len to define the hostname,
** but do not modify and data at item->data.
** If anything goes wrong, the contents of *item are undefined.
*/
static SECStatus
parseUriHostname(SECItem * item)
{
int i;
PRBool found = PR_FALSE;
for (i = 0; (unsigned)(i+2) < item->len; ++i) {
if (item->data[i ] == ':' &&
item->data[i+1] == '/' &&
item->data[i+2] == '/') {
i += 3;
item->data += i;
item->len -= i;
found = PR_TRUE;
break;
}
}
if (!found)
return SECFailure;
/* now look for a '/', which is an upper bound in the end of the name */
for (i = 0; (unsigned)i < item->len; ++i) {
if (item->data[i] == '/') {
item->len = i;
break;
}
}
/* now look for a ':', which marks the end of the name */
for (i = item->len; --i >= 0; ) {
if (item->data[i] == ':') {
item->len = i;
break;
}
}
/* now look for an '@', which marks the beginning of the hostname */
for (i = 0; (unsigned)i < item->len; ++i) {
if (item->data[i] == '@') {
++i;
item->data += i;
item->len -= i;
break;
}
}
return item->len ? SECSuccess : SECFailure;
}
/* This function takes one name, and a list of constraints.
** It searches the constraints looking for a match.
** It returns SECSuccess if the name satisfies the constraints, i.e.,
** if excluded, then the name does not match any constraint,
** if permitted, then the name matches at least one constraint.
** It returns SECFailure if the name fails to satisfy the constraints,
** or if some code fails (e.g. out of memory, or invalid constraint)
*/
SECStatus
cert_CompareNameWithConstraints(const CERTGeneralName *name,
const CERTNameConstraint *constraints,
PRBool excluded)
{
SECStatus rv = SECSuccess;
SECStatus matched = SECFailure;
const CERTNameConstraint *current;
PORT_Assert(constraints); /* caller should not call with NULL */
if (!constraints) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
current = constraints;
do {
rv = SECSuccess;
matched = SECFailure;
PORT_Assert(name->type == current->name.type);
switch (name->type) {
case certDNSName:
matched = compareDNSN2C(&name->name.other,
&current->name.name.other);
break;
case certRFC822Name:
matched = compareRFC822N2C(&name->name.other,
&current->name.name.other);
break;
case certURI:
{
/* make a modifiable copy of the URI SECItem. */
SECItem uri = name->name.other;
/* find the hostname in the URI */
rv = parseUriHostname(&uri);
if (rv == SECSuccess) {
/* does our hostname meet the constraint? */
matched = compareURIN2C(&uri, &current->name.name.other);
}
}
break;
case certDirectoryName:
/* Determine if the constraint directory name is a "prefix"
** for the directory name being tested.
*/
{
/* status defaults to SECEqual, so that a constraint with
** no AVAs will be a wildcard, matching all directory names.
*/
SECComparison status = SECEqual;
const CERTRDN **cRDNs =
(const CERTRDN **)current->name.name.directoryName.rdns;
const CERTRDN **nRDNs =
(const CERTRDN **)name->name.directoryName.rdns;
while (cRDNs && *cRDNs && nRDNs && *nRDNs) {
/* loop over name RDNs and constraint RDNs in lock step */
const CERTRDN *cRDN = *cRDNs++;
const CERTRDN *nRDN = *nRDNs++;
CERTAVA **cAVAs = cRDN->avas;
while (cAVAs && *cAVAs) { /* loop over constraint AVAs */
CERTAVA *cAVA = *cAVAs++;
CERTAVA **nAVAs = nRDN->avas;
while (nAVAs && *nAVAs) { /* loop over name AVAs */
CERTAVA *nAVA = *nAVAs++;
status = CERT_CompareAVA(cAVA, nAVA);
if (status == SECEqual)
break;
} /* loop over name AVAs */
if (status != SECEqual)
break;
} /* loop over constraint AVAs */
if (status != SECEqual)
break;
} /* loop over name RDNs and constraint RDNs */
matched = (status == SECEqual) ? SECSuccess : SECFailure;
break;
}
case certIPAddress: /* type 8 */
matched = compareIPaddrN2C(&name->name.other,
&current->name.name.other);
break;
/* NSS does not know how to compare these "Other" type names with
** their respective constraints. But it does know how to tell
** if the constraint applies to the type of name (by comparing
** the constraint OID to the name OID). NSS makes no use of "Other"
** type names at all, so NSS errs on the side of leniency for these
** types, provided that their OIDs match. So, when an "Other"
** name constraint appears in an excluded subtree, it never causes
** a name to fail. When an "Other" name constraint appears in a
** permitted subtree, AND the constraint's OID matches the name's
** OID, then name is treated as if it matches the constraint.
*/
case certOtherName: /* type 1 */
matched = (!excluded &&
name->type == current->name.type &&
SECITEM_ItemsAreEqual(&name->name.OthName.oid,
&current->name.name.OthName.oid))
? SECSuccess : SECFailure;
break;
/* NSS does not know how to compare these types of names with their
** respective constraints. But NSS makes no use of these types of
** names at all, so it errs on the side of leniency for these types.
** Constraints for these types of names never cause the name to
** fail the constraints test. NSS behaves as if the name matched
** for permitted constraints, and did not match for excluded ones.
*/
case certX400Address: /* type 4 */
case certEDIPartyName: /* type 6 */
case certRegisterID: /* type 9 */
matched = excluded ? SECFailure : SECSuccess;
break;
default: /* non-standard types are not supported */
rv = SECFailure;
break;
}
if (matched == SECSuccess || rv != SECSuccess)
break;
current = CERT_GetNextNameConstraint((CERTNameConstraint*)current);
} while (current != constraints);
if (rv == SECSuccess) {
if (matched == SECSuccess)
rv = excluded ? SECFailure : SECSuccess;
else
rv = excluded ? SECSuccess : SECFailure;
return rv;
}
return SECFailure;
}
/* Add and link a CERTGeneralName to a CERTNameConstraint list. Most
** likely the CERTNameConstraint passed in is either the permitted
** list or the excluded list of a CERTNameConstraints.
*/
SECStatus
CERT_AddNameConstraintByGeneralName(PLArenaPool *arena,
CERTNameConstraint **constraints,
CERTGeneralName *name)
{
SECStatus rv;
CERTNameConstraint *current = NULL;
CERTNameConstraint *first = *constraints;
void *mark = NULL;
mark = PORT_ArenaMark(arena);
current = PORT_ArenaZNew(arena, CERTNameConstraint);
if (current == NULL) {
rv = SECFailure;
goto done;
}
rv = cert_CopyOneGeneralName(arena, &current->name, name);
if (rv != SECSuccess) {
goto done;
}
current->name.l.prev = current->name.l.next = &(current->name.l);
if (first == NULL) {
*constraints = current;
PR_INIT_CLIST(&current->l);
} else {
PR_INSERT_BEFORE(&current->l, &first->l);
}
done:
if (rv == SECFailure) {
PORT_ArenaRelease(arena, mark);
} else {
PORT_ArenaUnmark(arena, mark);
}
return rv;
}
/*
* Here we define a list of name constraints to be imposed on
* certain certificates, most importantly root certificates.
*
* Each entry in the name constraints list is constructed with this
* macro. An entry contains two SECItems, which have names in
* specific forms to make the macro work:
*
* * ${CA}_SUBJECT_DN - The subject DN for which the constraints
* should be applied
* * ${CA}_NAME_CONSTRAINTS - The name constraints extension
*
* Entities subject to name constraints are identified by subject name
* so that we can cover all certificates for that entity, including, e.g.,
* cross-certificates. We use subject rather than public key because
* calling methods often have easy access to that field (vs., say, a key ID),
* and in practice, subject names and public keys are usually in one-to-one
* correspondence anyway.
*
*/
#define STRING_TO_SECITEM(str) \
{ siBuffer, (unsigned char*) str, sizeof(str) - 1 }
#define NAME_CONSTRAINTS_ENTRY(CA) \
{ \
STRING_TO_SECITEM(CA ## _SUBJECT_DN), \
STRING_TO_SECITEM(CA ## _NAME_CONSTRAINTS) \
}
/* Agence Nationale de la Securite des Systemes d'Information (ANSSI) */
#define ANSSI_SUBJECT_DN \
"\x30\x81\x85" \
"\x31\x0B\x30\x09\x06\x03\x55\x04\x06\x13\x02" "FR" /* C */ \
"\x31\x0F\x30\x0D\x06\x03\x55\x04\x08\x13\x06" "France" /* ST */ \
"\x31\x0E\x30\x0C\x06\x03\x55\x04\x07\x13\x05" "Paris" /* L */ \
"\x31\x10\x30\x0E\x06\x03\x55\x04\x0A\x13\x07" "PM/SGDN" /* O */ \
"\x31\x0E\x30\x0C\x06\x03\x55\x04\x0B\x13\x05" "DCSSI" /* OU */ \
"\x31\x0E\x30\x0C\x06\x03\x55\x04\x03\x13\x05" "IGC/A" /* CN */ \
"\x31\x23\x30\x21\x06\x09\x2A\x86\x48\x86\xF7\x0D\x01\x09\x01" \
"\x16\x14" "igca@sgdn.pm.gouv.fr" /* emailAddress */ \
#define ANSSI_NAME_CONSTRAINTS \
"\x30\x5D\xA0\x5B" \
"\x30\x05\x82\x03" ".fr" \
"\x30\x05\x82\x03" ".gp" \
"\x30\x05\x82\x03" ".gf" \
"\x30\x05\x82\x03" ".mq" \
"\x30\x05\x82\x03" ".re" \
"\x30\x05\x82\x03" ".yt" \
"\x30\x05\x82\x03" ".pm" \
"\x30\x05\x82\x03" ".bl" \
"\x30\x05\x82\x03" ".mf" \
"\x30\x05\x82\x03" ".wf" \
"\x30\x05\x82\x03" ".pf" \
"\x30\x05\x82\x03" ".nc" \
"\x30\x05\x82\x03" ".tf" \
static const SECItem builtInNameConstraints[][2] = {
NAME_CONSTRAINTS_ENTRY(ANSSI)
};
SECStatus
CERT_GetImposedNameConstraints(const SECItem *derSubject,
SECItem *extensions)
{
size_t i;
if (!extensions) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
for (i = 0; i < PR_ARRAY_SIZE(builtInNameConstraints); ++i) {
if (SECITEM_ItemsAreEqual(derSubject, &builtInNameConstraints[i][0])) {
return SECITEM_CopyItem(NULL,
extensions,
&builtInNameConstraints[i][1]);
}
}
PORT_SetError(SEC_ERROR_EXTENSION_NOT_FOUND);
return SECFailure;
}
/*
* Extract the name constraints extension from the CA cert.
* If the certificate contains no name constraints extension, but
* CERT_GetImposedNameConstraints returns a name constraints extension
* for the subject of the certificate, then that extension will be returned.
*/
SECStatus
CERT_FindNameConstraintsExten(PLArenaPool *arena,
CERTCertificate *cert,
CERTNameConstraints **constraints)
{
SECStatus rv = SECSuccess;
SECItem constraintsExtension;
void *mark = NULL;
*constraints = NULL;
rv = CERT_FindCertExtension(cert, SEC_OID_X509_NAME_CONSTRAINTS,
&constraintsExtension);
if (rv != SECSuccess) {
if (PORT_GetError() != SEC_ERROR_EXTENSION_NOT_FOUND) {
return rv;
}
rv = CERT_GetImposedNameConstraints(&cert->derSubject,
&constraintsExtension);
if (rv != SECSuccess) {
if (PORT_GetError() == SEC_ERROR_EXTENSION_NOT_FOUND) {
return SECSuccess;
}
return rv;
}
}
mark = PORT_ArenaMark(arena);
*constraints = cert_DecodeNameConstraints(arena, &constraintsExtension);
if (*constraints == NULL) { /* decode failed */
rv = SECFailure;
}
PORT_Free (constraintsExtension.data);
if (rv == SECFailure) {
PORT_ArenaRelease(arena, mark);
} else {
PORT_ArenaUnmark(arena, mark);
}
return rv;
}
/* Verify name against all the constraints relevant to that type of
** the name.
*/
SECStatus
CERT_CheckNameSpace(PLArenaPool *arena,
const CERTNameConstraints *constraints,
const CERTGeneralName *currentName)
{
CERTNameConstraint *matchingConstraints;
SECStatus rv = SECSuccess;
if (constraints->excluded != NULL) {
rv = CERT_GetNameConstraintByType(constraints->excluded,
currentName->type,
&matchingConstraints, arena);
if (rv == SECSuccess && matchingConstraints != NULL) {
rv = cert_CompareNameWithConstraints(currentName,
matchingConstraints,
PR_TRUE);
}
if (rv != SECSuccess) {
return(rv);
}
}
if (constraints->permited != NULL) {
rv = CERT_GetNameConstraintByType(constraints->permited,
currentName->type,
&matchingConstraints, arena);
if (rv == SECSuccess && matchingConstraints != NULL) {
rv = cert_CompareNameWithConstraints(currentName,
matchingConstraints,
PR_FALSE);
}
if (rv != SECSuccess) {
return(rv);
}
}
return(SECSuccess);
}
/* Extract the name constraints extension from the CA cert.
** Test each and every name in namesList against all the constraints
** relevant to that type of name.
** Returns NULL in pBadCert for success, if all names are acceptable.
** If some name is not acceptable, returns a pointer to the cert that
** contained that name.
*/
SECStatus
CERT_CompareNameSpace(CERTCertificate *cert,
CERTGeneralName *namesList,
CERTCertificate **certsList,
PLArenaPool *reqArena,
CERTCertificate **pBadCert)
{
SECStatus rv = SECSuccess;
CERTNameConstraints *constraints;
CERTGeneralName *currentName;
int count = 0;
CERTCertificate *badCert = NULL;
/* If no names to check, then no names can be bad. */
if (!namesList)
goto done;
rv = CERT_FindNameConstraintsExten(reqArena, cert, &constraints);
if (rv != SECSuccess) {
count = -1;
goto done;
}
currentName = namesList;
do {
if (constraints){
rv = CERT_CheckNameSpace(reqArena, constraints, currentName);
if (rv != SECSuccess) {
break;
}
}
currentName = CERT_GetNextGeneralName(currentName);
count ++;
} while (currentName != namesList);
done:
if (rv != SECSuccess) {
badCert = (count >= 0) ? certsList[count] : cert;
}
if (pBadCert)
*pBadCert = badCert;
return rv;
}
#if 0
/* not exported from shared libs, not used. Turn on if we ever need it. */
SECStatus
CERT_CompareGeneralName(CERTGeneralName *a, CERTGeneralName *b)
{
CERTGeneralName *currentA;
CERTGeneralName *currentB;
PRBool found;
currentA = a;
currentB = b;
if (a != NULL) {
do {
if (currentB == NULL) {
return SECFailure;
}
currentB = CERT_GetNextGeneralName(currentB);
currentA = CERT_GetNextGeneralName(currentA);
} while (currentA != a);
}
if (currentB != b) {
return SECFailure;
}
currentA = a;
do {
currentB = b;
found = PR_FALSE;
do {
if (currentB->type == currentA->type) {
switch (currentB->type) {
case certDNSName:
case certEDIPartyName:
case certIPAddress:
case certRegisterID:
case certRFC822Name:
case certX400Address:
case certURI:
if (SECITEM_CompareItem(&currentA->name.other,
&currentB->name.other)
== SECEqual) {
found = PR_TRUE;
}
break;
case certOtherName:
if (SECITEM_CompareItem(&currentA->name.OthName.oid,
&currentB->name.OthName.oid)
== SECEqual &&
SECITEM_CompareItem(&currentA->name.OthName.name,
&currentB->name.OthName.name)
== SECEqual) {
found = PR_TRUE;
}
break;
case certDirectoryName:
if (CERT_CompareName(&currentA->name.directoryName,
&currentB->name.directoryName)
== SECEqual) {
found = PR_TRUE;
}
}
}
currentB = CERT_GetNextGeneralName(currentB);
} while (currentB != b && found != PR_TRUE);
if (found != PR_TRUE) {
return SECFailure;
}
currentA = CERT_GetNextGeneralName(currentA);
} while (currentA != a);
return SECSuccess;
}
SECStatus
CERT_CompareGeneralNameLists(CERTGeneralNameList *a, CERTGeneralNameList *b)
{
SECStatus rv;
if (a == b) {
return SECSuccess;
}
if (a != NULL && b != NULL) {
PZ_Lock(a->lock);
PZ_Lock(b->lock);
rv = CERT_CompareGeneralName(a->name, b->name);
PZ_Unlock(a->lock);
PZ_Unlock(b->lock);
} else {
rv = SECFailure;
}
return rv;
}
#endif
#if 0
/* This function is not exported from NSS shared libraries, and is not
** used inside of NSS.
** XXX it doesn't check for failed allocations. :-(
*/
void *
CERT_GetGeneralNameFromListByType(CERTGeneralNameList *list,
CERTGeneralNameType type,
PLArenaPool *arena)
{
CERTName *name = NULL;
SECItem *item = NULL;
OtherName *other = NULL;
OtherName *tmpOther = NULL;
void *data;
PZ_Lock(list->lock);
data = CERT_GetGeneralNameByType(list->name, type, PR_FALSE);
if (data != NULL) {
switch (type) {
case certDNSName:
case certEDIPartyName:
case certIPAddress:
case certRegisterID:
case certRFC822Name:
case certX400Address:
case certURI:
if (arena != NULL) {
item = PORT_ArenaNew(arena, SECItem);
if (item != NULL) {
XXX SECITEM_CopyItem(arena, item, (SECItem *) data);
}
} else {
item = SECITEM_DupItem((SECItem *) data);
}
PZ_Unlock(list->lock);
return item;
case certOtherName:
other = (OtherName *) data;
if (arena != NULL) {
tmpOther = PORT_ArenaNew(arena, OtherName);
} else {
tmpOther = PORT_New(OtherName);
}
if (tmpOther != NULL) {
XXX SECITEM_CopyItem(arena, &tmpOther->oid, &other->oid);
XXX SECITEM_CopyItem(arena, &tmpOther->name, &other->name);
}
PZ_Unlock(list->lock);
return tmpOther;
case certDirectoryName:
if (arena) {
name = PORT_ArenaZNew(list->arena, CERTName);
if (name) {
XXX CERT_CopyName(arena, name, (CERTName *) data);
}
}
PZ_Unlock(list->lock);
return name;
}
}
PZ_Unlock(list->lock);
return NULL;
}
#endif
#if 0
/* This function is not exported from NSS shared libraries, and is not
** used inside of NSS.
** XXX it should NOT be a void function, since it does allocations
** that can fail.
*/
void
CERT_AddGeneralNameToList(CERTGeneralNameList *list,
CERTGeneralNameType type,
void *data, SECItem *oid)
{
CERTGeneralName *name;
if (list != NULL && data != NULL) {
PZ_Lock(list->lock);
name = CERT_NewGeneralName(list->arena, type);
if (!name)
goto done;
switch (type) {
case certDNSName:
case certEDIPartyName:
case certIPAddress:
case certRegisterID:
case certRFC822Name:
case certX400Address:
case certURI:
XXX SECITEM_CopyItem(list->arena, &name->name.other, (SECItem *)data);
break;
case certOtherName:
XXX SECITEM_CopyItem(list->arena, &name->name.OthName.name,
(SECItem *) data);
XXX SECITEM_CopyItem(list->arena, &name->name.OthName.oid,
oid);
break;
case certDirectoryName:
XXX CERT_CopyName(list->arena, &name->name.directoryName,
(CERTName *) data);
break;
}
list->name = cert_CombineNamesLists(list->name, name);
list->len++;
done:
PZ_Unlock(list->lock);
}
return;
}
#endif
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