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gecko/security/nss/lib/certdb/alg1485.c
Wan-Teh Chang 5f2e0cfef4 Bug 466745: Upgraded NSS to NSS_3_12_3_BETA3.
2009-02-10 09:18:32 -08:00

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/* alg1485.c - implementation of RFCs 1485, 1779 and 2253.
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape security libraries.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1994-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "prprf.h"
#include "cert.h"
#include "certi.h"
#include "xconst.h"
#include "genname.h"
#include "secitem.h"
#include "secerr.h"
typedef struct NameToKindStr {
const char * name;
unsigned int maxLen; /* max bytes in UTF8 encoded string value */
SECOidTag kind;
int valueType;
} NameToKind;
/* local type for directory string--could be printable_string or utf8 */
#define SEC_ASN1_DS SEC_ASN1_HIGH_TAG_NUMBER
/* Add new entries to this table, and maybe to function ParseRFC1485AVA */
static const NameToKind name2kinds[] = {
/* IANA registered type names
* (See: http://www.iana.org/assignments/ldap-parameters)
*/
/* RFC 3280, 4630 MUST SUPPORT */
{ "CN", 64, SEC_OID_AVA_COMMON_NAME, SEC_ASN1_DS},
{ "ST", 128, SEC_OID_AVA_STATE_OR_PROVINCE,
SEC_ASN1_DS},
{ "O", 64, SEC_OID_AVA_ORGANIZATION_NAME,
SEC_ASN1_DS},
{ "OU", 64, SEC_OID_AVA_ORGANIZATIONAL_UNIT_NAME,
SEC_ASN1_DS},
{ "dnQualifier", 32767, SEC_OID_AVA_DN_QUALIFIER, SEC_ASN1_PRINTABLE_STRING},
{ "C", 2, SEC_OID_AVA_COUNTRY_NAME, SEC_ASN1_PRINTABLE_STRING},
{ "serialNumber", 64, SEC_OID_AVA_SERIAL_NUMBER,SEC_ASN1_PRINTABLE_STRING},
/* RFC 3280, 4630 SHOULD SUPPORT */
{ "L", 128, SEC_OID_AVA_LOCALITY, SEC_ASN1_DS},
{ "title", 64, SEC_OID_AVA_TITLE, SEC_ASN1_DS},
{ "SN", 64, SEC_OID_AVA_SURNAME, SEC_ASN1_DS},
{ "givenName", 64, SEC_OID_AVA_GIVEN_NAME, SEC_ASN1_DS},
{ "initials", 64, SEC_OID_AVA_INITIALS, SEC_ASN1_DS},
{ "generationQualifier",
64, SEC_OID_AVA_GENERATION_QUALIFIER,
SEC_ASN1_DS},
/* RFC 3280, 4630 MAY SUPPORT */
{ "DC", 128, SEC_OID_AVA_DC, SEC_ASN1_IA5_STRING},
{ "MAIL", 256, SEC_OID_RFC1274_MAIL, SEC_ASN1_IA5_STRING},
{ "UID", 256, SEC_OID_RFC1274_UID, SEC_ASN1_DS},
/* ------------------ "strict" boundary ---------------------------------
* In strict mode, cert_NameToAscii does not encode any of the attributes
* below this line. The first SECOidTag below this line must be used to
* conditionally define the "endKind" in function AppendAVA() below.
* Most new attribute names should be added below this line.
* Maybe this line should be up higher? Say, after the 3280 MUSTs and
* before the 3280 SHOULDs?
*/
/* values from draft-ietf-ldapbis-user-schema-05 (not in RFC 3280) */
{ "postalAddress", 128, SEC_OID_AVA_POSTAL_ADDRESS, SEC_ASN1_DS},
{ "postalCode", 40, SEC_OID_AVA_POSTAL_CODE, SEC_ASN1_DS},
{ "postOfficeBox", 40, SEC_OID_AVA_POST_OFFICE_BOX,SEC_ASN1_DS},
{ "houseIdentifier",64, SEC_OID_AVA_HOUSE_IDENTIFIER,SEC_ASN1_DS},
/* end of IANA registered type names */
/* legacy keywords */
{ "E", 128, SEC_OID_PKCS9_EMAIL_ADDRESS,SEC_ASN1_DS},
#if 0 /* removed. Not yet in any IETF draft or RFC. */
{ "pseudonym", 64, SEC_OID_AVA_PSEUDONYM, SEC_ASN1_DS},
#endif
{ 0, 256, SEC_OID_UNKNOWN , 0},
};
#define C_DOUBLE_QUOTE '\042'
#define C_BACKSLASH '\134'
#define C_EQUAL '='
#define OPTIONAL_SPACE(c) \
(((c) == ' ') || ((c) == '\r') || ((c) == '\n'))
#define SPECIAL_CHAR(c) \
(((c) == ',') || ((c) == '=') || ((c) == C_DOUBLE_QUOTE) || \
((c) == '\r') || ((c) == '\n') || ((c) == '+') || \
((c) == '<') || ((c) == '>') || ((c) == '#') || \
((c) == ';') || ((c) == C_BACKSLASH))
#define IS_PRINTABLE(c) \
((((c) >= 'a') && ((c) <= 'z')) || \
(((c) >= 'A') && ((c) <= 'Z')) || \
(((c) >= '0') && ((c) <= '9')) || \
((c) == ' ') || \
((c) == '\'') || \
((c) == '\050') || /* ( */ \
((c) == '\051') || /* ) */ \
(((c) >= '+') && ((c) <= '/')) || /* + , - . / */ \
((c) == ':') || \
((c) == '=') || \
((c) == '?'))
int
cert_AVAOidTagToMaxLen(SECOidTag tag)
{
const NameToKind *n2k = name2kinds;
while (n2k->kind != tag && n2k->kind != SEC_OID_UNKNOWN) {
++n2k;
}
return (n2k->kind != SEC_OID_UNKNOWN) ? n2k->maxLen : -1;
}
static PRBool
IsPrintable(unsigned char *data, unsigned len)
{
unsigned char ch, *end;
end = data + len;
while (data < end) {
ch = *data++;
if (!IS_PRINTABLE(ch)) {
return PR_FALSE;
}
}
return PR_TRUE;
}
static void
skipSpace(char **pbp, char *endptr)
{
char *bp = *pbp;
while (bp < endptr && OPTIONAL_SPACE(*bp)) {
bp++;
}
*pbp = bp;
}
static SECStatus
scanTag(char **pbp, char *endptr, char *tagBuf, int tagBufSize)
{
char *bp, *tagBufp;
int taglen;
PORT_Assert(tagBufSize > 0);
/* skip optional leading space */
skipSpace(pbp, endptr);
if (*pbp == endptr) {
/* nothing left */
return SECFailure;
}
/* fill tagBuf */
taglen = 0;
bp = *pbp;
tagBufp = tagBuf;
while (bp < endptr && !OPTIONAL_SPACE(*bp) && (*bp != C_EQUAL)) {
if (++taglen >= tagBufSize) {
*pbp = bp;
return SECFailure;
}
*tagBufp++ = *bp++;
}
/* null-terminate tagBuf -- guaranteed at least one space left */
*tagBufp++ = 0;
*pbp = bp;
/* skip trailing spaces till we hit something - should be an equal sign */
skipSpace(pbp, endptr);
if (*pbp == endptr) {
/* nothing left */
return SECFailure;
}
if (**pbp != C_EQUAL) {
/* should be an equal sign */
return SECFailure;
}
/* skip over the equal sign */
(*pbp)++;
return SECSuccess;
}
static SECStatus
scanVal(char **pbp, char *endptr, char *valBuf, int valBufSize)
{
char *bp, *valBufp;
int vallen;
PRBool isQuoted;
PORT_Assert(valBufSize > 0);
/* skip optional leading space */
skipSpace(pbp, endptr);
if(*pbp == endptr) {
/* nothing left */
return SECFailure;
}
bp = *pbp;
/* quoted? */
if (*bp == C_DOUBLE_QUOTE) {
isQuoted = PR_TRUE;
/* skip over it */
bp++;
} else {
isQuoted = PR_FALSE;
}
valBufp = valBuf;
vallen = 0;
while (bp < endptr) {
char c = *bp;
if (c == C_BACKSLASH) {
/* escape character */
bp++;
if (bp >= endptr) {
/* escape charater must appear with paired char */
*pbp = bp;
return SECFailure;
}
} else if (c == '#' && bp == *pbp) {
/* ignore leading #, quotation not required for it. */
} else if (!isQuoted && SPECIAL_CHAR(c)) {
/* unescaped special and not within quoted value */
break;
} else if (c == C_DOUBLE_QUOTE) {
/* reached unescaped double quote */
break;
}
/* append character */
vallen++;
if (vallen >= valBufSize) {
*pbp = bp;
return SECFailure;
}
*valBufp++ = *bp++;
}
/* stip trailing spaces from unquoted values */
if (!isQuoted) {
if (valBufp > valBuf) {
valBufp--;
while ((valBufp > valBuf) && OPTIONAL_SPACE(*valBufp)) {
valBufp--;
}
valBufp++;
}
}
if (isQuoted) {
/* insist that we stopped on a double quote */
if (*bp != C_DOUBLE_QUOTE) {
*pbp = bp;
return SECFailure;
}
/* skip over the quote and skip optional space */
bp++;
skipSpace(&bp, endptr);
}
*pbp = bp;
if (valBufp == valBuf) {
/* empty value -- not allowed */
return SECFailure;
}
/* null-terminate valBuf -- guaranteed at least one space left */
*valBufp++ = 0;
return SECSuccess;
}
static const PRInt16 x2b[256] =
{
/* #0x */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #1x */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #2x */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #3x */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
/* #4x */ -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #5x */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #6x */ -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #7x */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #8x */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #9x */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #ax */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #bx */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #cx */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #dx */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #ex */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/* #fx */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
/* Caller must set error code upon failure */
static SECStatus
hexToBin(PLArenaPool *pool, SECItem * destItem, const char * src, int len)
{
PRUint8 * dest;
destItem->data = NULL;
if (len <= 0 || (len & 1)) {
goto loser;
}
len >>= 1;
if (!SECITEM_AllocItem(pool, destItem, len))
goto loser;
dest = destItem->data;
for (; len > 0; len--, src += 2) {
PRInt16 bin = (x2b[(PRUint8)src[0]] << 4) | x2b[(PRUint8)src[1]];
if (bin < 0)
goto loser;
*dest++ = (PRUint8)bin;
}
return SECSuccess;
loser:
if (!pool)
SECITEM_FreeItem(destItem, PR_FALSE);
return SECFailure;
}
/* Parses one AVA, starting at *pbp. Stops at endptr.
* Advances *pbp past parsed AVA and trailing separator (if present).
* On any error, returns NULL and *pbp is undefined.
* On success, returns CERTAVA allocated from arena, and (*pbp)[-1] was
* the last character parsed. *pbp is either equal to endptr or
* points to first character after separator.
*/
static CERTAVA *
ParseRFC1485AVA(PRArenaPool *arena, char **pbp, char *endptr)
{
CERTAVA *a;
const NameToKind *n2k;
char *bp;
int vt = -1;
int valLen;
SECOidTag kind = SEC_OID_UNKNOWN;
SECStatus rv = SECFailure;
SECItem derOid = { 0, NULL, 0 };
char sep = 0;
char tagBuf[32];
char valBuf[384];
PORT_Assert(arena);
if (scanTag(pbp, endptr, tagBuf, sizeof(tagBuf)) == SECFailure ||
scanVal(pbp, endptr, valBuf, sizeof(valBuf)) == SECFailure) {
goto loser;
}
bp = *pbp;
if (bp < endptr) {
sep = *bp++; /* skip over separator */
}
*pbp = bp;
/* if we haven't finished, insist that we've stopped on a separator */
if (sep && sep != ',' && sep != ';' && sep != '+') {
goto loser;
}
/* is this a dotted decimal OID attribute type ? */
if (!PL_strncasecmp("oid.", tagBuf, 4)) {
rv = SEC_StringToOID(arena, &derOid, tagBuf, strlen(tagBuf));
} else {
for (n2k = name2kinds; n2k->name; n2k++) {
SECOidData *oidrec;
if (PORT_Strcasecmp(n2k->name, tagBuf) == 0) {
kind = n2k->kind;
vt = n2k->valueType;
oidrec = SECOID_FindOIDByTag(kind);
if (oidrec == NULL)
goto loser;
derOid = oidrec->oid;
break;
}
}
}
if (kind == SEC_OID_UNKNOWN && rv != SECSuccess)
goto loser;
/* Is this a hex encoding of a DER attribute value ? */
if ('#' == valBuf[0]) {
/* convert attribute value from hex to binary */
SECItem derVal = { 0, NULL, 0};
valLen = PORT_Strlen(valBuf+1);
rv = hexToBin(arena, &derVal, valBuf + 1, valLen);
if (rv)
goto loser;
a = CERT_CreateAVAFromRaw(arena, &derOid, &derVal);
} else {
if (kind == SEC_OID_UNKNOWN)
goto loser;
valLen = PORT_Strlen(valBuf);
if (kind == SEC_OID_AVA_COUNTRY_NAME && valLen != 2)
goto loser;
if (vt == SEC_ASN1_PRINTABLE_STRING &&
!IsPrintable((unsigned char*) valBuf, valLen))
goto loser;
if (vt == SEC_ASN1_DS) {
/* RFC 4630: choose PrintableString or UTF8String */
if (IsPrintable((unsigned char*) valBuf, valLen))
vt = SEC_ASN1_PRINTABLE_STRING;
else
vt = SEC_ASN1_UTF8_STRING;
}
a = CERT_CreateAVA(arena, kind, vt, (char *)valBuf);
}
return a;
loser:
/* matched no kind -- invalid tag */
PORT_SetError(SEC_ERROR_INVALID_AVA);
return 0;
}
static CERTName *
ParseRFC1485Name(char *buf, int len)
{
SECStatus rv;
CERTName *name;
char *bp, *e;
CERTAVA *ava;
CERTRDN *rdn = NULL;
name = CERT_CreateName(NULL);
if (name == NULL) {
return NULL;
}
e = buf + len;
bp = buf;
while (bp < e) {
ava = ParseRFC1485AVA(name->arena, &bp, e);
if (ava == 0)
goto loser;
if (!rdn) {
rdn = CERT_CreateRDN(name->arena, ava, (CERTAVA *)0);
if (rdn == 0)
goto loser;
rv = CERT_AddRDN(name, rdn);
} else {
rv = CERT_AddAVA(name->arena, rdn, ava);
}
if (rv)
goto loser;
if (bp[-1] != '+')
rdn = NULL; /* done with this RDN */
skipSpace(&bp, e);
}
if (name->rdns[0] == 0) {
/* empty name -- illegal */
goto loser;
}
/* Reverse order of RDNS to comply with RFC */
{
CERTRDN **firstRdn;
CERTRDN **lastRdn;
CERTRDN *tmp;
/* get first one */
firstRdn = name->rdns;
/* find last one */
lastRdn = name->rdns;
while (*lastRdn) lastRdn++;
lastRdn--;
/* reverse list */
for ( ; firstRdn < lastRdn; firstRdn++, lastRdn--) {
tmp = *firstRdn;
*firstRdn = *lastRdn;
*lastRdn = tmp;
}
}
/* return result */
return name;
loser:
CERT_DestroyName(name);
return NULL;
}
CERTName *
CERT_AsciiToName(char *string)
{
CERTName *name;
name = ParseRFC1485Name(string, PORT_Strlen(string));
return name;
}
/************************************************************************/
typedef struct stringBufStr {
char *buffer;
unsigned offset;
unsigned size;
} stringBuf;
#define DEFAULT_BUFFER_SIZE 200
static SECStatus
AppendStr(stringBuf *bufp, char *str)
{
char *buf;
unsigned bufLen, bufSize, len;
int size = 0;
/* Figure out how much to grow buf by (add in the '\0') */
buf = bufp->buffer;
bufLen = bufp->offset;
len = PORT_Strlen(str);
bufSize = bufLen + len;
if (!buf) {
bufSize++;
size = PR_MAX(DEFAULT_BUFFER_SIZE,bufSize*2);
buf = (char *) PORT_Alloc(size);
bufp->size = size;
} else if (bufp->size < bufSize) {
size = bufSize*2;
buf =(char *) PORT_Realloc(buf,size);
bufp->size = size;
}
if (!buf) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return SECFailure;
}
bufp->buffer = buf;
bufp->offset = bufSize;
/* Concatenate str onto buf */
buf = buf + bufLen;
if (bufLen) buf--; /* stomp on old '\0' */
PORT_Memcpy(buf, str, len+1); /* put in new null */
return SECSuccess;
}
static int
cert_RFC1485_GetRequiredLen(const char *src, int srclen, PRBool *pNeedsQuoting)
{
int i, reqLen=0;
PRBool needsQuoting = PR_FALSE;
char lastC = 0;
/* need to make an initial pass to determine if quoting is needed */
for (i = 0; i < srclen; i++) {
char c = src[i];
reqLen++;
if (!needsQuoting && (SPECIAL_CHAR(c) ||
(OPTIONAL_SPACE(c) && OPTIONAL_SPACE(lastC)))) {
/* entirety will need quoting */
needsQuoting = PR_TRUE;
}
if (c == C_DOUBLE_QUOTE || c == C_BACKSLASH) {
/* this char will need escaping */
reqLen++;
}
lastC = c;
}
/* if it begins or ends in optional space it needs quoting */
if (!needsQuoting && srclen > 0 &&
(OPTIONAL_SPACE(src[srclen-1]) || OPTIONAL_SPACE(src[0]))) {
needsQuoting = PR_TRUE;
}
if (needsQuoting)
reqLen += 2;
if (pNeedsQuoting)
*pNeedsQuoting = needsQuoting;
return reqLen;
}
SECStatus
CERT_RFC1485_EscapeAndQuote(char *dst, int dstlen, char *src, int srclen)
{
int i, reqLen=0;
char *d = dst;
PRBool needsQuoting = PR_FALSE;
/* space for terminal null */
reqLen = cert_RFC1485_GetRequiredLen(src, srclen, &needsQuoting) + 1;
if (reqLen > dstlen) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
return SECFailure;
}
d = dst;
if (needsQuoting) *d++ = C_DOUBLE_QUOTE;
for (i = 0; i < srclen; i++) {
char c = src[i];
if (c == C_DOUBLE_QUOTE || c == C_BACKSLASH) {
/* escape it */
*d++ = C_BACKSLASH;
}
*d++ = c;
}
if (needsQuoting) *d++ = C_DOUBLE_QUOTE;
*d++ = 0;
return SECSuccess;
}
/* convert an OID to dotted-decimal representation */
/* Returns a string that must be freed with PR_smprintf_free(), */
char *
CERT_GetOidString(const SECItem *oid)
{
PRUint8 *end;
PRUint8 *d;
PRUint8 *e;
char *a = NULL;
char *b;
#define MAX_OID_LEN 1024 /* bytes */
if (oid->len > MAX_OID_LEN) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return NULL;
}
/* d will point to the next sequence of bytes to decode */
d = (PRUint8 *)oid->data;
/* end points to one past the legitimate data */
end = &d[ oid->len ];
/*
* Check for our pseudo-encoded single-digit OIDs
*/
if( (*d == 0x80) && (2 == oid->len) ) {
/* Funky encoding. The second byte is the number */
a = PR_smprintf("%lu", (PRUint32)d[1]);
if( (char *)NULL == a ) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return (char *)NULL;
}
return a;
}
for( ; d < end; d = &e[1] ) {
for( e = d; e < end; e++ ) {
if( 0 == (*e & 0x80) ) {
break;
}
}
if( ((e-d) > 4) || (((e-d) == 4) && (*d & 0x70)) ) {
/* More than a 32-bit number */
} else {
PRUint32 n = 0;
switch( e-d ) {
case 4:
n |= ((PRUint32)(e[-4] & 0x0f)) << 28;
case 3:
n |= ((PRUint32)(e[-3] & 0x7f)) << 21;
case 2:
n |= ((PRUint32)(e[-2] & 0x7f)) << 14;
case 1:
n |= ((PRUint32)(e[-1] & 0x7f)) << 7;
case 0:
n |= ((PRUint32)(e[-0] & 0x7f)) ;
}
if( (char *)NULL == a ) {
/* This is the first number.. decompose it */
PRUint32 one = PR_MIN(n/40, 2); /* never > 2 */
PRUint32 two = n - one * 40;
a = PR_smprintf("OID.%lu.%lu", one, two);
if( (char *)NULL == a ) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return (char *)NULL;
}
} else {
b = PR_smprintf("%s.%lu", a, n);
if( (char *)NULL == b ) {
PR_smprintf_free(a);
PORT_SetError(SEC_ERROR_NO_MEMORY);
return (char *)NULL;
}
PR_smprintf_free(a);
a = b;
}
}
}
return a;
}
/* convert DER-encoded hex to a string */
static SECItem *
get_hex_string(SECItem *data)
{
SECItem *rv;
unsigned int i, j;
static const char hex[] = { "0123456789ABCDEF" };
/* '#' + 2 chars per octet + terminator */
rv = SECITEM_AllocItem(NULL, NULL, data->len*2 + 2);
if (!rv) {
return NULL;
}
rv->data[0] = '#';
rv->len = 1 + 2 * data->len;
for (i=0; i<data->len; i++) {
j = data->data[i];
rv->data[2*i+1] = hex[j >> 4];
rv->data[2*i+2] = hex[j & 15];
}
rv->data[rv->len] = 0;
return rv;
}
/* For compliance with RFC 2253, RFC 3280 and RFC 4630, we choose to
* use the NAME=STRING form, rather than the OID.N.N=#hexXXXX form,
* when both of these conditions are met:
* 1) The attribute name OID (kind) has a known name string that is
* defined in one of those RFCs, or in RFCs that they cite, AND
* 2) The attribute's value encoding is RFC compliant for the kind
* (e.g., the value's encoding tag is correct for the kind, and
* the value's length is in the range allowed for the kind, and
* the value's contents are appropriate for the encoding tag).
* Otherwise, we use the OID.N.N=#hexXXXX form.
*
* If the caller prefers maximum human readability to RFC compliance,
* then
* - We print the kind in NAME= string form if we know the name
* string for the attribute type OID, regardless of whether the
* value is correctly encoded or not. else we use the OID.N.N= form.
* - We use the non-hex STRING form for the attribute value if the
* value can be represented in such a form. Otherwise, we use
* the hex string form.
* This implies that, for maximum human readability, in addition to
* the two forms allowed by the RFC, we allow two other forms of output:
* - the OID.N.N=STRING form, and
* - the NAME=#hexXXXX form
* When the caller prefers maximum human readability, we do not allow
* the value of any attribute to exceed the length allowed by the RFC.
* If the attribute value exceeds the allowed length, we truncate it to
* the allowed length and append "...".
* Also in this case, we arbitrarily impose a limit on the length of the
* entire AVA encoding, regardless of the form, of 384 bytes per AVA.
* This limit includes the trailing NULL character. If the encoded
* AVA length exceeds that limit, this function reports failure to encode
* the AVA.
*
* An ASCII representation of an AVA is said to be "invertible" if
* conversion back to DER reproduces the original DER encoding exactly.
* The RFC 2253 rules do not ensure that all ASCII AVAs derived according
* to its rules are invertible. That is because the RFCs allow some
* attribute values to be encoded in any of a number of encodings,
* and the encoding type information is lost in the non-hex STRING form.
* This is particularly true of attributes of type DirectoryString.
* The encoding type information is always preserved in the hex string
* form, because the hex includes the entire DER encoding of the value.
*
* So, when the caller perfers maximum invertibility, we apply the
* RFC compliance rules stated above, and add a third required
* condition on the use of the NAME=STRING form.
* 3) The attribute's kind is not is allowed to be encoded in any of
* several different encodings, such as DirectoryStrings.
*
* The chief difference between CERT_N2A_STRICT and CERT_N2A_INVERTIBLE
* is that the latter forces DirectoryStrings to be hex encoded.
*
* As a simplification, we assume the value is correctly encoded for
* its encoding type. That is, we do not test that all the characters
* in a string encoded type are allowed by that type. We assume it.
*/
static SECStatus
AppendAVA(stringBuf *bufp, CERTAVA *ava, CertStrictnessLevel strict)
{
const NameToKind *pn2k = name2kinds;
SECItem *avaValue = NULL;
char *unknownTag = NULL;
char *encodedAVA = NULL;
PRBool useHex = PR_FALSE; /* use =#hexXXXX form */
SECOidTag endKind;
SECStatus rv;
unsigned int len;
int nameLen, valueLen;
NameToKind n2k = { NULL, 32767, SEC_OID_UNKNOWN, SEC_ASN1_DS };
char tmpBuf[384];
#define tagName n2k.name /* non-NULL means use NAME= form */
#define maxBytes n2k.maxLen
#define tag n2k.kind
#define vt n2k.valueType
/* READABLE mode recognizes more names from the name2kinds table
* than do STRICT or INVERTIBLE modes. This assignment chooses the
* point in the table where the attribute type name scanning stops.
*/
endKind = (strict == CERT_N2A_READABLE) ? SEC_OID_UNKNOWN
: SEC_OID_AVA_POSTAL_ADDRESS;
tag = CERT_GetAVATag(ava);
while (pn2k->kind != tag && pn2k->kind != endKind) {
++pn2k;
}
if (pn2k->kind != endKind ) {
n2k = *pn2k;
} else if (strict != CERT_N2A_READABLE) {
useHex = PR_TRUE;
}
/* For invertable form, force Directory Strings to use hex form. */
if (strict == CERT_N2A_INVERTIBLE && vt == SEC_ASN1_DS) {
tagName = NULL; /* must use OID.N form */
useHex = PR_TRUE; /* must use hex string */
}
if (!useHex) {
avaValue = CERT_DecodeAVAValue(&ava->value);
if (!avaValue) {
useHex = PR_TRUE;
if (strict != CERT_N2A_READABLE) {
tagName = NULL; /* must use OID.N form */
}
}
}
if (!tagName) {
/* handle unknown attribute types per RFC 2253 */
tagName = unknownTag = CERT_GetOidString(&ava->type);
if (!tagName) {
if (avaValue)
SECITEM_FreeItem(avaValue, PR_TRUE);
return SECFailure;
}
}
if (useHex) {
avaValue = get_hex_string(&ava->value);
if (!avaValue) {
if (unknownTag)
PR_smprintf_free(unknownTag);
return SECFailure;
}
}
if (strict == CERT_N2A_READABLE) {
if (maxBytes > sizeof(tmpBuf) - 4)
maxBytes = sizeof(tmpBuf) - 4;
/* Check value length. Must be room for "..." */
if (avaValue->len > maxBytes + 3) {
/* avaValue is a UTF8 string, freshly allocated and returned to us
** by CERT_DecodeAVAValue or get_hex_string just above, so we can
** modify it here. See if we're in the middle of a multi-byte
** UTF8 character.
*/
len = maxBytes;
while (((avaValue->data[len] & 0xc0) == 0x80) && len > 0) {
len--;
}
/* add elipsis to signify truncation. */
avaValue->data[len++] = '.';
avaValue->data[len++] = '.';
avaValue->data[len++] = '.';
avaValue->data[len] = 0;
avaValue->len = len;
}
}
nameLen = strlen(tagName);
valueLen = (useHex ? avaValue->len :
cert_RFC1485_GetRequiredLen(avaValue->data, avaValue->len, NULL));
len = nameLen + valueLen + 2; /* Add 2 for '=' and trailing NUL */
if (len <= sizeof(tmpBuf)) {
encodedAVA = tmpBuf;
} else if (strict == CERT_N2A_READABLE) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
} else {
encodedAVA = PORT_Alloc(len);
}
if (!encodedAVA) {
SECITEM_FreeItem(avaValue, PR_TRUE);
if (unknownTag)
PR_smprintf_free(unknownTag);
return SECFailure;
}
memcpy(encodedAVA, tagName, nameLen);
if (unknownTag)
PR_smprintf_free(unknownTag);
encodedAVA[nameLen++] = '=';
/* escape and quote as necessary - don't quote hex strings */
if (useHex) {
memcpy(encodedAVA + nameLen, (char *)avaValue->data, avaValue->len);
encodedAVA[nameLen + avaValue->len] = '\0';
rv = SECSuccess;
} else
rv = CERT_RFC1485_EscapeAndQuote(encodedAVA + nameLen, len - nameLen,
(char *)avaValue->data, avaValue->len);
SECITEM_FreeItem(avaValue, PR_TRUE);
if (rv == SECSuccess)
rv = AppendStr(bufp, encodedAVA);
if (encodedAVA != tmpBuf)
PORT_Free(encodedAVA);
return rv;
}
#undef tagName
#undef maxBytes
#undef tag
#undef vt
char *
CERT_NameToAsciiInvertible(CERTName *name, CertStrictnessLevel strict)
{
CERTRDN** rdns;
CERTRDN** lastRdn;
CERTRDN** rdn;
PRBool first = PR_TRUE;
stringBuf strBuf = { NULL, 0, 0 };
rdns = name->rdns;
if (rdns == NULL) {
return NULL;
}
/* find last RDN */
lastRdn = rdns;
while (*lastRdn) lastRdn++;
lastRdn--;
/*
* Loop over name contents in _reverse_ RDN order appending to string
*/
for (rdn = lastRdn; rdn >= rdns; rdn--) {
CERTAVA** avas = (*rdn)->avas;
CERTAVA* ava;
PRBool newRDN = PR_TRUE;
/*
* XXX Do we need to traverse the AVAs in reverse order, too?
*/
while (avas && (ava = *avas++) != NULL) {
SECStatus rv;
/* Put in comma or plus separator */
if (!first) {
/* Use of spaces is deprecated in RFC 2253. */
rv = AppendStr(&strBuf, newRDN ? "," : "+");
if (rv) goto loser;
} else {
first = PR_FALSE;
}
/* Add in tag type plus value into buf */
rv = AppendAVA(&strBuf, ava, strict);
if (rv) goto loser;
newRDN = PR_FALSE;
}
}
return strBuf.buffer;
loser:
if (strBuf.buffer) {
PORT_Free(strBuf.buffer);
}
return NULL;
}
char *
CERT_NameToAscii(CERTName *name)
{
return CERT_NameToAsciiInvertible(name, CERT_N2A_READABLE);
}
/*
* Return the string representation of a DER encoded distinguished name
* "dername" - The DER encoded name to convert
*/
char *
CERT_DerNameToAscii(SECItem *dername)
{
int rv;
PRArenaPool *arena = NULL;
CERTName name;
char *retstr = NULL;
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if ( arena == NULL) {
goto loser;
}
rv = SEC_QuickDERDecodeItem(arena, &name, CERT_NameTemplate, dername);
if ( rv != SECSuccess ) {
goto loser;
}
retstr = CERT_NameToAscii(&name);
loser:
if ( arena != NULL ) {
PORT_FreeArena(arena, PR_FALSE);
}
return(retstr);
}
/* RDNs are sorted from most general to most specific.
* This code returns the FIRST one found, the most general one found.
*/
static char *
CERT_GetNameElement(PRArenaPool *arena, CERTName *name, int wantedTag)
{
CERTRDN** rdns;
CERTRDN *rdn;
char *buf = 0;
rdns = name->rdns;
while (rdns && (rdn = *rdns++) != 0) {
CERTAVA** avas = rdn->avas;
CERTAVA* ava;
while (avas && (ava = *avas++) != 0) {
int tag = CERT_GetAVATag(ava);
if ( tag == wantedTag ) {
SECItem *decodeItem = CERT_DecodeAVAValue(&ava->value);
if(!decodeItem) {
return NULL;
}
if (arena) {
buf = (char *)PORT_ArenaZAlloc(arena,decodeItem->len + 1);
} else {
buf = (char *)PORT_ZAlloc(decodeItem->len + 1);
}
if ( buf ) {
PORT_Memcpy(buf, decodeItem->data, decodeItem->len);
buf[decodeItem->len] = 0;
}
SECITEM_FreeItem(decodeItem, PR_TRUE);
goto done;
}
}
}
done:
return buf;
}
/* RDNs are sorted from most general to most specific.
* This code returns the LAST one found, the most specific one found.
* This is particularly appropriate for Common Name. See RFC 2818.
*/
static char *
CERT_GetLastNameElement(PRArenaPool *arena, CERTName *name, int wantedTag)
{
CERTRDN** rdns;
CERTRDN *rdn;
CERTAVA * lastAva = NULL;
char *buf = 0;
rdns = name->rdns;
while (rdns && (rdn = *rdns++) != 0) {
CERTAVA** avas = rdn->avas;
CERTAVA* ava;
while (avas && (ava = *avas++) != 0) {
int tag = CERT_GetAVATag(ava);
if ( tag == wantedTag ) {
lastAva = ava;
}
}
}
if (lastAva) {
SECItem *decodeItem = CERT_DecodeAVAValue(&lastAva->value);
if(!decodeItem) {
return NULL;
}
if (arena) {
buf = (char *)PORT_ArenaZAlloc(arena,decodeItem->len + 1);
} else {
buf = (char *)PORT_ZAlloc(decodeItem->len + 1);
}
if ( buf ) {
PORT_Memcpy(buf, decodeItem->data, decodeItem->len);
buf[decodeItem->len] = 0;
}
SECITEM_FreeItem(decodeItem, PR_TRUE);
}
return buf;
}
char *
CERT_GetCertificateEmailAddress(CERTCertificate *cert)
{
char *rawEmailAddr = NULL;
SECItem subAltName;
SECStatus rv;
CERTGeneralName *nameList = NULL;
CERTGeneralName *current;
PRArenaPool *arena = NULL;
int i;
subAltName.data = NULL;
rawEmailAddr = CERT_GetNameElement(cert->arena, &(cert->subject),
SEC_OID_PKCS9_EMAIL_ADDRESS);
if ( rawEmailAddr == NULL ) {
rawEmailAddr = CERT_GetNameElement(cert->arena, &(cert->subject),
SEC_OID_RFC1274_MAIL);
}
if ( rawEmailAddr == NULL) {
rv = CERT_FindCertExtension(cert, SEC_OID_X509_SUBJECT_ALT_NAME,
&subAltName);
if (rv != SECSuccess) {
goto finish;
}
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (!arena) {
goto finish;
}
nameList = current = CERT_DecodeAltNameExtension(arena, &subAltName);
if (!nameList ) {
goto finish;
}
if (nameList != NULL) {
do {
if (current->type == certDirectoryName) {
rawEmailAddr = CERT_GetNameElement(cert->arena,
&(current->name.directoryName),
SEC_OID_PKCS9_EMAIL_ADDRESS);
if ( rawEmailAddr == NULL ) {
rawEmailAddr = CERT_GetNameElement(cert->arena,
&(current->name.directoryName), SEC_OID_RFC1274_MAIL);
}
} else if (current->type == certRFC822Name) {
rawEmailAddr = (char*)PORT_ArenaZAlloc(cert->arena,
current->name.other.len + 1);
if (!rawEmailAddr) {
goto finish;
}
PORT_Memcpy(rawEmailAddr, current->name.other.data,
current->name.other.len);
rawEmailAddr[current->name.other.len] = '\0';
}
if (rawEmailAddr) {
break;
}
current = CERT_GetNextGeneralName(current);
} while (current != nameList);
}
}
if (rawEmailAddr) {
for (i = 0; i <= (int) PORT_Strlen(rawEmailAddr); i++) {
rawEmailAddr[i] = tolower(rawEmailAddr[i]);
}
}
finish:
/* Don't free nameList, it's part of the arena. */
if (arena) {
PORT_FreeArena(arena, PR_FALSE);
}
if ( subAltName.data ) {
SECITEM_FreeItem(&subAltName, PR_FALSE);
}
return(rawEmailAddr);
}
static char *
appendStringToBuf(char *dest, char *src, PRUint32 *pRemaining)
{
PRUint32 len;
if (dest && src && src[0] && *pRemaining > (len = PL_strlen(src))) {
PRUint32 i;
for (i = 0; i < len; ++i)
dest[i] = tolower(src[i]);
dest[len] = 0;
dest += len + 1;
*pRemaining -= len + 1;
}
return dest;
}
static char *
appendItemToBuf(char *dest, SECItem *src, PRUint32 *pRemaining)
{
if (dest && src && src->data && src->len && src->data[0] &&
*pRemaining > src->len + 1 ) {
PRUint32 len = src->len;
PRUint32 i;
for (i = 0; i < len && src->data[i] ; ++i)
dest[i] = tolower(src->data[i]);
dest[len] = 0;
dest += len + 1;
*pRemaining -= len + 1;
}
return dest;
}
/* Returns a pointer to an environment-like string, a series of
** null-terminated strings, terminated by a zero-length string.
** This function is intended to be internal to NSS.
*/
char *
cert_GetCertificateEmailAddresses(CERTCertificate *cert)
{
char * rawEmailAddr = NULL;
char * addrBuf = NULL;
char * pBuf = NULL;
PRArenaPool * tmpArena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
PRUint32 maxLen = 0;
PRInt32 finalLen = 0;
SECStatus rv;
SECItem subAltName;
if (!tmpArena)
return addrBuf;
subAltName.data = NULL;
maxLen = cert->derCert.len;
PORT_Assert(maxLen);
if (!maxLen)
maxLen = 2000; /* a guess, should never happen */
pBuf = addrBuf = (char *)PORT_ArenaZAlloc(tmpArena, maxLen + 1);
if (!addrBuf)
goto loser;
rawEmailAddr = CERT_GetNameElement(tmpArena, &cert->subject,
SEC_OID_PKCS9_EMAIL_ADDRESS);
pBuf = appendStringToBuf(pBuf, rawEmailAddr, &maxLen);
rawEmailAddr = CERT_GetNameElement(tmpArena, &cert->subject,
SEC_OID_RFC1274_MAIL);
pBuf = appendStringToBuf(pBuf, rawEmailAddr, &maxLen);
rv = CERT_FindCertExtension(cert, SEC_OID_X509_SUBJECT_ALT_NAME,
&subAltName);
if (rv == SECSuccess && subAltName.data) {
CERTGeneralName *nameList = NULL;
if (!!(nameList = CERT_DecodeAltNameExtension(tmpArena, &subAltName))) {
CERTGeneralName *current = nameList;
do {
if (current->type == certDirectoryName) {
rawEmailAddr = CERT_GetNameElement(tmpArena,
&current->name.directoryName,
SEC_OID_PKCS9_EMAIL_ADDRESS);
pBuf = appendStringToBuf(pBuf, rawEmailAddr, &maxLen);
rawEmailAddr = CERT_GetNameElement(tmpArena,
&current->name.directoryName,
SEC_OID_RFC1274_MAIL);
pBuf = appendStringToBuf(pBuf, rawEmailAddr, &maxLen);
} else if (current->type == certRFC822Name) {
pBuf = appendItemToBuf(pBuf, &current->name.other, &maxLen);
}
current = CERT_GetNextGeneralName(current);
} while (current != nameList);
}
SECITEM_FreeItem(&subAltName, PR_FALSE);
/* Don't free nameList, it's part of the tmpArena. */
}
/* now copy superstring to cert's arena */
finalLen = (pBuf - addrBuf) + 1;
pBuf = NULL;
if (finalLen > 1) {
pBuf = PORT_ArenaAlloc(cert->arena, finalLen);
if (pBuf) {
PORT_Memcpy(pBuf, addrBuf, finalLen);
}
}
loser:
if (tmpArena)
PORT_FreeArena(tmpArena, PR_FALSE);
return pBuf;
}
/* returns pointer to storage in cert's arena. Storage remains valid
** as long as cert's reference count doesn't go to zero.
** Caller should strdup or otherwise copy.
*/
const char * /* const so caller won't muck with it. */
CERT_GetFirstEmailAddress(CERTCertificate * cert)
{
if (cert && cert->emailAddr && cert->emailAddr[0])
return (const char *)cert->emailAddr;
return NULL;
}
/* returns pointer to storage in cert's arena. Storage remains valid
** as long as cert's reference count doesn't go to zero.
** Caller should strdup or otherwise copy.
*/
const char * /* const so caller won't muck with it. */
CERT_GetNextEmailAddress(CERTCertificate * cert, const char * prev)
{
if (cert && prev && prev[0]) {
PRUint32 len = PL_strlen(prev);
prev += len + 1;
if (prev && prev[0])
return prev;
}
return NULL;
}
/* This is seriously bogus, now that certs store their email addresses in
** subject Alternative Name extensions.
** Returns a string allocated by PORT_StrDup, which the caller must free.
*/
char *
CERT_GetCertEmailAddress(CERTName *name)
{
char *rawEmailAddr;
char *emailAddr;
rawEmailAddr = CERT_GetNameElement(NULL, name, SEC_OID_PKCS9_EMAIL_ADDRESS);
if ( rawEmailAddr == NULL ) {
rawEmailAddr = CERT_GetNameElement(NULL, name, SEC_OID_RFC1274_MAIL);
}
emailAddr = CERT_FixupEmailAddr(rawEmailAddr);
if ( rawEmailAddr ) {
PORT_Free(rawEmailAddr);
}
return(emailAddr);
}
/* The return value must be freed with PORT_Free. */
char *
CERT_GetCommonName(CERTName *name)
{
return(CERT_GetLastNameElement(NULL, name, SEC_OID_AVA_COMMON_NAME));
}
char *
CERT_GetCountryName(CERTName *name)
{
return(CERT_GetNameElement(NULL, name, SEC_OID_AVA_COUNTRY_NAME));
}
char *
CERT_GetLocalityName(CERTName *name)
{
return(CERT_GetNameElement(NULL, name, SEC_OID_AVA_LOCALITY));
}
char *
CERT_GetStateName(CERTName *name)
{
return(CERT_GetNameElement(NULL, name, SEC_OID_AVA_STATE_OR_PROVINCE));
}
char *
CERT_GetOrgName(CERTName *name)
{
return(CERT_GetNameElement(NULL, name, SEC_OID_AVA_ORGANIZATION_NAME));
}
char *
CERT_GetDomainComponentName(CERTName *name)
{
return(CERT_GetNameElement(NULL, name, SEC_OID_AVA_DC));
}
char *
CERT_GetOrgUnitName(CERTName *name)
{
return(CERT_GetNameElement(NULL, name, SEC_OID_AVA_ORGANIZATIONAL_UNIT_NAME));
}
char *
CERT_GetDnQualifier(CERTName *name)
{
return(CERT_GetNameElement(NULL, name, SEC_OID_AVA_DN_QUALIFIER));
}
char *
CERT_GetCertUid(CERTName *name)
{
return(CERT_GetNameElement(NULL, name, SEC_OID_RFC1274_UID));
}
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