The Tor Browser: security/nss/lib/cryptohi/sechash.c@b8a032363ba2 (annotated)

security/nss/lib/cryptohi/sechash.c@b8a032363ba2 (annotated)

security/nss/lib/cryptohi/sechash.c

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* 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 "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 *
 sha224_NewContext(void) {
 	return (void *) PK11_CreateDigestContext(SEC_OID_SHA224);
 }
 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,
 ,
     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
   },
   { SHA224_LENGTH,
     (void * (*)(void)) sha224_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,
     SHA224_BLOCK_LENGTH,
     HASH_AlgSHA224
   },
 };
 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_SHA224: ht = HASH_AlgSHA224; 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_SHA224: hashOid = SEC_OID_SHA224; 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(hashOid) {
     /* 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_SHA224: hmacOid = SEC_OID_HMAC_SHA224; 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,
 	     const 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);
 }

The Tor Browser / annotate

security/nss/lib/cryptohi/sechash.c@b8a032363ba2 (annotated)

security/nss/lib/cryptohi/sechash.c