gecko/security/nss/lib/cryptohi/sechash.c
2008-06-06 08:40:11 -04:00

423 lines
11 KiB
C

/* ***** 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 "sechash.h"
#include "secoidt.h"
#include "secerr.h"
#include "blapi.h"
#include "pk11func.h" /* for the PK11_ calls below. */
static void *
null_hash_new_context(void)
{
return NULL;
}
static void *
null_hash_clone_context(void *v)
{
PORT_Assert(v == NULL);
return NULL;
}
static void
null_hash_begin(void *v)
{
}
static void
null_hash_update(void *v, const unsigned char *input, unsigned int length)
{
}
static void
null_hash_end(void *v, unsigned char *output, unsigned int *outLen,
unsigned int maxOut)
{
*outLen = 0;
}
static void
null_hash_destroy_context(void *v, PRBool b)
{
PORT_Assert(v == NULL);
}
static void *
md2_NewContext(void) {
return (void *) PK11_CreateDigestContext(SEC_OID_MD2);
}
static void *
md5_NewContext(void) {
return (void *) PK11_CreateDigestContext(SEC_OID_MD5);
}
static void *
sha1_NewContext(void) {
return (void *) PK11_CreateDigestContext(SEC_OID_SHA1);
}
static void *
sha256_NewContext(void) {
return (void *) PK11_CreateDigestContext(SEC_OID_SHA256);
}
static void *
sha384_NewContext(void) {
return (void *) PK11_CreateDigestContext(SEC_OID_SHA384);
}
static void *
sha512_NewContext(void) {
return (void *) PK11_CreateDigestContext(SEC_OID_SHA512);
}
const SECHashObject SECHashObjects[] = {
{ 0,
(void * (*)(void)) null_hash_new_context,
(void * (*)(void *)) null_hash_clone_context,
(void (*)(void *, PRBool)) null_hash_destroy_context,
(void (*)(void *)) null_hash_begin,
(void (*)(void *, const unsigned char *, unsigned int)) null_hash_update,
(void (*)(void *, unsigned char *, unsigned int *,
unsigned int)) null_hash_end,
0,
HASH_AlgNULL
},
{ MD2_LENGTH,
(void * (*)(void)) md2_NewContext,
(void * (*)(void *)) PK11_CloneContext,
(void (*)(void *, PRBool)) PK11_DestroyContext,
(void (*)(void *)) PK11_DigestBegin,
(void (*)(void *, const unsigned char *, unsigned int)) PK11_DigestOp,
(void (*)(void *, unsigned char *, unsigned int *, unsigned int))
PK11_DigestFinal,
MD2_BLOCK_LENGTH,
HASH_AlgMD2
},
{ MD5_LENGTH,
(void * (*)(void)) md5_NewContext,
(void * (*)(void *)) PK11_CloneContext,
(void (*)(void *, PRBool)) PK11_DestroyContext,
(void (*)(void *)) PK11_DigestBegin,
(void (*)(void *, const unsigned char *, unsigned int)) PK11_DigestOp,
(void (*)(void *, unsigned char *, unsigned int *, unsigned int))
PK11_DigestFinal,
MD5_BLOCK_LENGTH,
HASH_AlgMD5
},
{ SHA1_LENGTH,
(void * (*)(void)) sha1_NewContext,
(void * (*)(void *)) PK11_CloneContext,
(void (*)(void *, PRBool)) PK11_DestroyContext,
(void (*)(void *)) PK11_DigestBegin,
(void (*)(void *, const unsigned char *, unsigned int)) PK11_DigestOp,
(void (*)(void *, unsigned char *, unsigned int *, unsigned int))
PK11_DigestFinal,
SHA1_BLOCK_LENGTH,
HASH_AlgSHA1
},
{ SHA256_LENGTH,
(void * (*)(void)) sha256_NewContext,
(void * (*)(void *)) PK11_CloneContext,
(void (*)(void *, PRBool)) PK11_DestroyContext,
(void (*)(void *)) PK11_DigestBegin,
(void (*)(void *, const unsigned char *, unsigned int)) PK11_DigestOp,
(void (*)(void *, unsigned char *, unsigned int *, unsigned int))
PK11_DigestFinal,
SHA256_BLOCK_LENGTH,
HASH_AlgSHA256
},
{ SHA384_LENGTH,
(void * (*)(void)) sha384_NewContext,
(void * (*)(void *)) PK11_CloneContext,
(void (*)(void *, PRBool)) PK11_DestroyContext,
(void (*)(void *)) PK11_DigestBegin,
(void (*)(void *, const unsigned char *, unsigned int)) PK11_DigestOp,
(void (*)(void *, unsigned char *, unsigned int *, unsigned int))
PK11_DigestFinal,
SHA384_BLOCK_LENGTH,
HASH_AlgSHA384
},
{ SHA512_LENGTH,
(void * (*)(void)) sha512_NewContext,
(void * (*)(void *)) PK11_CloneContext,
(void (*)(void *, PRBool)) PK11_DestroyContext,
(void (*)(void *)) PK11_DigestBegin,
(void (*)(void *, const unsigned char *, unsigned int)) PK11_DigestOp,
(void (*)(void *, unsigned char *, unsigned int *, unsigned int))
PK11_DigestFinal,
SHA512_BLOCK_LENGTH,
HASH_AlgSHA512
},
};
const SECHashObject *
HASH_GetHashObject(HASH_HashType type)
{
return &SECHashObjects[type];
}
HASH_HashType
HASH_GetHashTypeByOidTag(SECOidTag hashOid)
{
HASH_HashType ht = HASH_AlgNULL;
switch(hashOid) {
case SEC_OID_MD2: ht = HASH_AlgMD2; break;
case SEC_OID_MD5: ht = HASH_AlgMD5; break;
case SEC_OID_SHA1: ht = HASH_AlgSHA1; break;
case SEC_OID_SHA256: ht = HASH_AlgSHA256; break;
case SEC_OID_SHA384: ht = HASH_AlgSHA384; break;
case SEC_OID_SHA512: ht = HASH_AlgSHA512; break;
default: ht = HASH_AlgNULL;
PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
break;
}
return ht;
}
SECOidTag
HASH_GetHashOidTagByHMACOidTag(SECOidTag hmacOid)
{
SECOidTag hashOid = SEC_OID_UNKNOWN;
switch(hmacOid) {
/* no oid exists for HMAC_MD2 */
/* NSS does not define a oid for HMAC_MD4 */
case SEC_OID_HMAC_SHA1: hashOid = SEC_OID_SHA1; break;
case SEC_OID_HMAC_SHA256: hashOid = SEC_OID_SHA256; break;
case SEC_OID_HMAC_SHA384: hashOid = SEC_OID_SHA384; break;
case SEC_OID_HMAC_SHA512: hashOid = SEC_OID_SHA512; break;
default: hashOid = SEC_OID_UNKNOWN;
PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
break;
}
return hashOid;
}
SECOidTag
HASH_GetHMACOidTagByHashOidTag(SECOidTag hashOid)
{
SECOidTag hmacOid = SEC_OID_UNKNOWN;
switch(hmacOid) {
/* no oid exists for HMAC_MD2 */
/* NSS does not define a oid for HMAC_MD4 */
case SEC_OID_SHA1: hmacOid = SEC_OID_HMAC_SHA1; break;
case SEC_OID_SHA256: hmacOid = SEC_OID_HMAC_SHA256; break;
case SEC_OID_SHA384: hmacOid = SEC_OID_HMAC_SHA384; break;
case SEC_OID_SHA512: hmacOid = SEC_OID_HMAC_SHA512; break;
default: hmacOid = SEC_OID_UNKNOWN;
PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
break;
}
return hmacOid;
}
const SECHashObject *
HASH_GetHashObjectByOidTag(SECOidTag hashOid)
{
HASH_HashType ht = HASH_GetHashTypeByOidTag(hashOid);
return (ht == HASH_AlgNULL) ? NULL : &SECHashObjects[ht];
}
/* returns zero for unknown hash OID */
unsigned int
HASH_ResultLenByOidTag(SECOidTag hashOid)
{
const SECHashObject * hashObject = HASH_GetHashObjectByOidTag(hashOid);
unsigned int resultLen = 0;
if (hashObject)
resultLen = hashObject->length;
return resultLen;
}
/* returns zero if hash type invalid. */
unsigned int
HASH_ResultLen(HASH_HashType type)
{
if ( ( type < HASH_AlgNULL ) || ( type >= HASH_AlgTOTAL ) ) {
PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
return(0);
}
return(SECHashObjects[type].length);
}
unsigned int
HASH_ResultLenContext(HASHContext *context)
{
return(context->hashobj->length);
}
SECStatus
HASH_HashBuf(HASH_HashType type,
unsigned char *dest,
unsigned char *src,
PRUint32 src_len)
{
HASHContext *cx;
unsigned int part;
if ( ( type < HASH_AlgNULL ) || ( type >= HASH_AlgTOTAL ) ) {
return(SECFailure);
}
cx = HASH_Create(type);
if ( cx == NULL ) {
return(SECFailure);
}
HASH_Begin(cx);
HASH_Update(cx, src, src_len);
HASH_End(cx, dest, &part, HASH_ResultLenContext(cx));
HASH_Destroy(cx);
return(SECSuccess);
}
HASHContext *
HASH_Create(HASH_HashType type)
{
void *hash_context = NULL;
HASHContext *ret = NULL;
if ( ( type < HASH_AlgNULL ) || ( type >= HASH_AlgTOTAL ) ) {
return(NULL);
}
hash_context = (* SECHashObjects[type].create)();
if ( hash_context == NULL ) {
goto loser;
}
ret = (HASHContext *)PORT_Alloc(sizeof(HASHContext));
if ( ret == NULL ) {
goto loser;
}
ret->hash_context = hash_context;
ret->hashobj = &SECHashObjects[type];
return(ret);
loser:
if ( hash_context != NULL ) {
(* SECHashObjects[type].destroy)(hash_context, PR_TRUE);
}
return(NULL);
}
HASHContext *
HASH_Clone(HASHContext *context)
{
void *hash_context = NULL;
HASHContext *ret = NULL;
hash_context = (* context->hashobj->clone)(context->hash_context);
if ( hash_context == NULL ) {
goto loser;
}
ret = (HASHContext *)PORT_Alloc(sizeof(HASHContext));
if ( ret == NULL ) {
goto loser;
}
ret->hash_context = hash_context;
ret->hashobj = context->hashobj;
return(ret);
loser:
if ( hash_context != NULL ) {
(* context->hashobj->destroy)(hash_context, PR_TRUE);
}
return(NULL);
}
void
HASH_Destroy(HASHContext *context)
{
(* context->hashobj->destroy)(context->hash_context, PR_TRUE);
PORT_Free(context);
return;
}
void
HASH_Begin(HASHContext *context)
{
(* context->hashobj->begin)(context->hash_context);
return;
}
void
HASH_Update(HASHContext *context,
const unsigned char *src,
unsigned int len)
{
(* context->hashobj->update)(context->hash_context, src, len);
return;
}
void
HASH_End(HASHContext *context,
unsigned char *result,
unsigned int *result_len,
unsigned int max_result_len)
{
(* context->hashobj->end)(context->hash_context, result, result_len,
max_result_len);
return;
}
HASH_HashType
HASH_GetType(HASHContext *context)
{
return(context->hashobj->type);
}