#include "hbytes.h"
#include "tables.h"
-#include "serpent.h"
void memxor(Byte *dest, const Byte *src, int l) {
while (l--) *dest++ ^= *src++;
}
-const PadMethod padmethods[]= {
+const PadOp padops[]= {
{ "un", 0, 0 },
{ "ua", 0, 1 },
{ "pn", 1, 0 },
{ 0 }
};
-int do_hbytes_pkcs5(ClientData cd, Tcl_Interp *ip,
- const PadMethod *meth, HBytes_Var v, Tcl_Obj *block,
- int *ok) {
- int rc, blocksize, padlen, old_len, i;
- Byte *padding;
- const Byte *unpad;
+typedef struct {
+ HBytes_Value *hb;
+ int pad, blocksize; /* 0 or 1 */
+} PadMethodClientData;
+
+int do_hbytes_pad(ClientData cd, Tcl_Interp *ip, const PadOp *op,
+ HBytes_Var v, Tcl_Obj *blocksz, const PadMethodInfo *meth,
+ int methargsc, Tcl_Obj *const *methargsv) {
+ PadMethodClientData pmcd;
+ int rc;
- if (meth->use_algname) {
+ if (op->use_algname) {
const BlockCipherAlgInfo *alg;
- alg= enum_lookup_cached(ip,block,blockcipheralginfos,"cipher alg for pad");
+ alg= enum_lookup_cached(ip,blocksz,blockcipheralginfos,
+ "blockcipher alg for pad");
if (!alg) return TCL_ERROR;
- blocksize= alg->blocksize;
+ pmcd.blocksize= alg->blocksize;
+ } else {
+ rc= Tcl_GetIntFromObj(ip, blocksz, &pmcd.blocksize); if (rc) return rc;
+ if (pmcd.blocksize < 1) staticerr(ip, "block size must be at least 1", 0);
+ }
+
+ pmcd.hb= v.hb;
+ pmcd.pad= op->pad;
+
+ return meth->func(&pmcd,ip,methargsc,methargsv);
+}
+
+int do_padmethodinfo_rfc2406(ClientData cd, Tcl_Interp *ip,
+ Tcl_Obj *nxthdr_arg, int *ok) {
+ const PadMethodClientData *pmcd= (const void*)cd;
+ int i, rc, padlen, old_len;
+
+ if (pmcd->blocksize > 256)
+ return staticerr(ip, "block size too large for RFC2406 padding", 0);
+
+ if (pmcd->pad) {
+ Byte *padding;
+ HBytes_Value nxthdr;
+
+ rc= pat_hb(ip,nxthdr_arg,&nxthdr);
+ if (rc) return rc;
+
+ if (hbytes_len(&nxthdr) != 1) return
+ staticerr(ip, "RFC2406 next header field must be exactly 1 byte", 0);
+ padlen= pmcd->blocksize-1 - ((hbytes_len(pmcd->hb)+1) % pmcd->blocksize);
+ padding= hbytes_append(pmcd->hb, padlen+2);
+ for (i=1; i<=padlen; i++)
+ *padding++ = i;
+ *padding++ = padlen;
+ *padding++ = hbytes_data(&nxthdr)[0];
+ *ok= 1;
+
} else {
- rc= Tcl_GetIntFromObj(ip, block, &blocksize); if (rc) return rc;
- if (blocksize < 1 || blocksize > 255)
- return staticerr(ip, "block size out of pkcs#5 range 1..255");
+ const Byte *padding, *trailer;
+ HBytes_Value nxthdr;
+ Tcl_Obj *nxthdr_valobj, *ro;
+
+ *ok= 0;
+ old_len= hbytes_len(pmcd->hb); if (old_len % pmcd->blocksize) goto quit;
+ trailer= hbytes_unappend(pmcd->hb, 2); if (!trailer) goto quit;
+
+ padlen= trailer[0];
+ hbytes_array(&nxthdr,trailer+1,1);
+ nxthdr_valobj= ret_hb(ip,nxthdr);
+ ro= Tcl_ObjSetVar2(ip,nxthdr_arg,0,nxthdr_valobj,TCL_LEAVE_ERR_MSG);
+ if (!ro) { Tcl_DecrRefCount(nxthdr_valobj); return TCL_ERROR; }
+
+ padding= hbytes_unappend(pmcd->hb, padlen);
+ for (i=1; i<=padlen; i++)
+ if (*padding++ != i) goto quit;
+
+ *ok= 1;
+
+ quit:;
+
}
- if (meth->pad) {
- padlen= blocksize - (hbytes_len(v.hb) % blocksize);
- padding= hbytes_append(v.hb, padlen);
+ return TCL_OK;
+}
+
+int do_padmethodinfo_pkcs5(ClientData cd, Tcl_Interp *ip, int *ok) {
+ const PadMethodClientData *pmcd= (const void*)cd;
+ int padlen, old_len, i;
+
+ if (pmcd->blocksize > 255)
+ return staticerr(ip, "block size too large for pkcs#5", 0);
+
+ if (pmcd->pad) {
+
+ Byte *padding;
+
+ padlen= pmcd->blocksize - (hbytes_len(pmcd->hb) % pmcd->blocksize);
+ padding= hbytes_append(pmcd->hb, padlen);
memset(padding, padlen, padlen);
+
} else {
- old_len= hbytes_len(v.hb); if (old_len % blocksize) goto bad;
- unpad= hbytes_unappend(v.hb, 1); if (!unpad) goto bad;
- padlen= *unpad;
- if (padlen < 1 || padlen > blocksize) goto bad;
- unpad= hbytes_unappend(v.hb, padlen-1); if (!unpad) goto bad;
- for (i=0; i<padlen-1; i++, unpad++) if (*unpad != padlen) goto bad;
+
+ const Byte *padding;
+
+ old_len= hbytes_len(pmcd->hb); if (old_len % pmcd->blocksize) goto bad;
+ padding= hbytes_unappend(pmcd->hb, 1); if (!padding) goto bad;
+ padlen= *padding;
+ if (padlen < 1 || padlen > pmcd->blocksize) goto bad;
+ padding= hbytes_unappend(pmcd->hb, padlen-1); if (!padding) goto bad;
+
+ for (i=0; i<padlen-1; i++, padding++) if (*padding != padlen) goto bad;
+
}
*ok= 1;
CiphKeyValue *key;
if (data_len % alg->blocksize)
- return staticerr(ip, "block cipher input not whole number of blocks");
+ return staticerr(ip, "block cipher input not whole number of blocks",
+ "HBYTES BLOCKCIPHER LENGTH");
want_bufferslen= alg->blocksize * (mode->buf_blocks + mode->iv_blocks);
key= get_key(ip, key_obj, alg, want_bufferslen); if (!key) return TCL_ERROR;
|| !decrypt) ? &key->alpha : &key->beta;
sched= *schedp;
if (!sched) {
- if (key->valuelen < alg->key_min) return staticerr(ip, "key too short");
- if (key->valuelen > alg->key_max) return staticerr(ip, "key too long");
+ if (key->valuelen < alg->key_min)
+ return staticerr(ip, "key too short", "HBYTES BLOCKCIPHER PARAMS");
+ if (key->valuelen > alg->key_max)
+ return staticerr(ip, "key too long", "HBYTES BLOCKCIPHER PARAMS");
sched= TALLOC(alg->schedule_size);
(decrypt ? &alg->decrypt : &alg->encrypt)->make_schedule
want_iv= alg->blocksize * mode->iv_blocks;
if (!want_iv) {
if (!hbytes_issentinel(iv))
- return staticerr(ip,"iv supplied but mode does not take one");
+ return staticerr(ip,"iv supplied but mode does not take one", 0);
} else if (hbytes_issentinel(iv)) {
- if (decrypt) return staticerr(ip,"must supply iv when decrypting");
+ if (decrypt) return staticerr(ip,"must supply iv when decrypting", 0);
rc= get_urandom(ip, key->buffers, want_iv);
if (rc) return rc;
} else {
int iv_supplied= hbytes_len(iv);
if (iv_supplied > want_iv)
- return staticerr(ip, "iv too large for algorithm and mode");
+ return staticerr(ip, "iv too large for algorithm and mode",
+ "HBYTES BLOCKCIPHER PARAMS");
memcpy(key->buffers, hbytes_data(iv), iv_supplied);
memset(key->buffers + iv_supplied, 0, want_iv - iv_supplied);
}
int nblocks;
if (!mode->encrypt)
- return staticerr(ip, "mode does not support encrypt/decrypt");
+ return staticerr(ip, "mode does not support encrypt/decrypt", 0);
rc= blockcipher_prep(ip,key_obj,&iv,!encrypt,
alg,mode, hbytes_len(v.hb),
(hbytes_data(v.hb), nblocks, ivbuf, buffers, alg, encrypt, sched);
if (failure)
- return staticerr(ip, failure);
+ return staticerr(ip, failure, "HBYTES BLOCKCIPHER CRYPTFAIL CRYPT");
hbytes_array(result, ivbuf, iv_lenbytes);
int rc;
if (!mode->mac)
- return staticerr(ip, "mode does not support mac generation");
+ return staticerr(ip, "mode does not support mac generation", 0);
rc= blockcipher_prep(ip,key_obj,&iv,0,
alg,mode, hbytes_len(&msg),
failure= mode->mac(hbytes_data(&msg), nblocks, ivbuf, buffers, alg, sched);
if (failure)
- return staticerr(ip,failure);
+ return staticerr(ip,failure, "HBYTES BLOCKCIPHER CRYPTFAIL MAC");
hbytes_array(result, buffers, alg->blocksize * mode->mac_blocks);
return TCL_OK;
}
-static void dbuf(const char *m, const Byte *a, int l) {
- fprintf(stderr,"dbuf %s l=%d ",m,l);
- while (l-->0) fprintf(stderr,"%02x",*a++);
- putc('\n',stderr);
-}
-
int do_hbytes_hmac(ClientData cd, Tcl_Interp *ip, const HashAlgInfo *alg,
HBytes_Value message, Tcl_Obj *key_obj,
Tcl_Obj *maclen_obj, HBytes_Value *result) {
if (maclen_obj) {
rc= Tcl_GetIntFromObj(ip, maclen_obj, &ml); if (rc) return rc;
if (ml<0 || ml>alg->hashsize)
- return staticerr(ip, "requested hmac output size out of range");
+ return staticerr(ip, "requested hmac output size out of range",
+ "HBYTES HMAC PARAMS");
} else {
ml= alg->hashsize;
}
assert(!key->beta);
if (key->valuelen > alg->blocksize)
- return staticerr(ip, "key to hmac longer than hash block size");
+ return staticerr(ip, "key to hmac longer than hash block size",
+ "HBYTES HMAC PARAMS");
-dbuf("start key",key->value,key->valuelen);
memcpy(key->buffers, key->value, key->valuelen);
memset(key->buffers + key->valuelen, 0, alg->blocksize - key->valuelen);
for (i=0; i<alg->blocksize; i++) key->buffers[i] ^= 0x36;
key->alpha= TALLOC(alg->statesize);
alg->init(key->alpha);
-dbuf("inner key",key->buffers,alg->blocksize);
alg->update(key->alpha, key->buffers, alg->blocksize);
key->beta= TALLOC(alg->statesize);
alg->init(key->beta);
for (i=0; i<alg->blocksize; i++) key->buffers[i] ^= (0x5c ^ 0x36);
alg->update(key->beta, key->buffers, alg->blocksize);
-dbuf("inner key",key->buffers,alg->blocksize);
}
assert(key->beta);
memcpy(key->buffers, key->alpha, alg->statesize);
alg->update(key->buffers, hbytes_data(&message), hbytes_len(&message));
alg->final(key->buffers, dest);
-dbuf("inner hash",dest,alg->hashsize);
memcpy(key->buffers, key->beta, alg->statesize);
alg->update(key->buffers, dest, alg->hashsize);
alg->final(key->buffers, dest);
-dbuf("outer hash",dest,alg->hashsize);
hbytes_unappend(result, alg->hashsize - ml);
return TCL_OK;
}
+
+int do_blockcipherop_prop(ClientData cd, Tcl_Interp *ip,
+ const BlockCipherPropInfo *prop,
+ const BlockCipherAlgInfo *alg, int *result) {
+ *result= *(const int*)((const char*)alg + prop->int_offset);
+ return TCL_OK;
+}
+
+int do_hbytes_hash_prop(ClientData cd, Tcl_Interp *ip,
+ const HashAlgPropInfo *prop,
+ const HashAlgInfo *alg, int *result) {
+ *result= *(const int*)((const char*)alg + prop->int_offset);
+ return TCL_OK;
+}