X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=chiark-tcl.git;a=blobdiff_plain;f=hbytes%2Fhook.c;h=b84306a1e12c8a516b21aedf9ca27ae200ca3751;hp=08e055d6426379687d01c580a3e8caf6e099c121;hb=ed7354bcb695fcf3ee3f5cea14be209fbb99f161;hpb=2cf1bfc63e73a424f9f3899c204025a8346b38e0

diff --git a/hbytes/hook.c b/hbytes/hook.c
index 08e055d..b84306a 100644
--- a/hbytes/hook.c
+++ b/hbytes/hook.c
@@ -1,14 +1,34 @@
 /*
  */
 
+#include <errno.h>
+
 #include "hbytes.h"
 #include "tables.h"
 
-int staticerr(Tcl_Interp *ip, const char *m) {
+int staticerr(Tcl_Interp *ip, const char *m, const char *ec) {
   Tcl_SetResult(ip, (char*)m, TCL_STATIC);
+  if (ec) Tcl_SetObjErrorCode(ip, Tcl_NewStringObj(ec,-1));
   return TCL_ERROR;
 }
 
+int posixerr(Tcl_Interp *ip, int errnoval, const char *m) {
+  const char *em;
+  
+  Tcl_ResetResult(ip);
+  errno= errnoval;
+  em= Tcl_PosixError(ip);
+  Tcl_AppendResult(ip, m, ": ", em, (char*)0);
+  return TCL_ERROR;
+}
+
+int newfdposixerr(Tcl_Interp *ip, int fd, const char *m) {
+  int e;
+  e= errno;
+  close(fd);
+  return posixerr(ip,e,m);
+}
+
 void objfreeir(Tcl_Obj *o) {
   if (o->typePtr && o->typePtr->freeIntRepProc)
     o->typePtr->freeIntRepProc(o);
@@ -16,50 +36,61 @@ void objfreeir(Tcl_Obj *o) {
 }  
 
 int do_hbytes_rep_info(ClientData cd, Tcl_Interp *ip,
-		       HBytes_Value v, Tcl_Obj **result) {
+		       Tcl_Obj *obj, Tcl_Obj **result) {
   const char *tn;
-  int nums[3], i;
+  int nums[3], i, lnl;
   Tcl_Obj *objl[4];
 
-  memset(nums,0,sizeof(nums));
-  nums[1]= hbytes_len(&v);
+  if (obj->typePtr == &hbytes_type) {
+    HBytes_Value *v= OBJ_HBYTES(obj);
+    memset(nums,0,sizeof(nums));
+    nums[1]= hbytes_len(v);
   
-  if (HBYTES_ISEMPTY(&v)) tn= "empty";
-  else if (HBYTES_ISSENTINEL(&v)) tn= "sentinel!";
-  else if (HBYTES_ISSIMPLE(&v)) tn= "simple";
-  else {
-    HBytes_ComplexValue *cx= v.begin_complex;
-    tn= "complex";
-    nums[0]= cx->prespace;
-    nums[2]= cx->avail - cx->len;
+    if (HBYTES_ISEMPTY(v)) tn= "empty";
+    else if (HBYTES_ISSENTINEL(v)) tn= "sentinel!";
+    else if (HBYTES_ISSIMPLE(v)) tn= "simple";
+    else {
+      HBytes_ComplexValue *cx= v->begin_complex;
+      tn= "complex";
+      nums[0]= cx->prespace;
+      nums[2]= cx->avail - cx->len;
+    }
+    lnl= 3;
+  } else {
+    tn= "other";
+    lnl= 0;
   }
     
   objl[0]= Tcl_NewStringObj((char*)tn,-1);
-  for (i=0; i<3; i++) objl[i+1]= Tcl_NewIntObj(nums[i]);
-  *result= Tcl_NewListObj(4,objl);
+  for (i=0; i<lnl; i++) objl[i+1]= Tcl_NewIntObj(nums[i]);
+  *result= Tcl_NewListObj(lnl+1,objl);
+    
   return TCL_OK;
 }
 
 static void hbytes_t_dup(Tcl_Obj *src, Tcl_Obj *dup) {
-  objfreeir(dup);
   hbytes_array(OBJ_HBYTES(dup),
 	       hbytes_data(OBJ_HBYTES(src)),
 	       hbytes_len(OBJ_HBYTES(src)));
+  dup->typePtr= &hbytes_type;
 }
 
 static void hbytes_t_free(Tcl_Obj *o) {
   hbytes_free(OBJ_HBYTES(o));
 }
 
-static void hbytes_t_ustr(Tcl_Obj *o) {
-  int l;
+void obj_updatestr_array_prefix(Tcl_Obj *o, const Byte *byte,
+				int l, const char *prefix) {
   char *str;
-  const Byte *byte;
+  int pl;
+
+  pl= strlen(prefix);
+  o->length= l*2+pl;
+  str= o->bytes= TALLOC(o->length+1);
+  
+  memcpy(str,prefix,pl);
+  str += pl;
 
-  byte= hbytes_data(OBJ_HBYTES(o));
-  l= hbytes_len(OBJ_HBYTES(o));
-  str= o->bytes= TALLOC(l*2+1);
-  o->length= l*2;
   while (l>0) {
     sprintf(str,"%02x",*byte);
     str+=2; byte++; l--;
@@ -67,31 +98,79 @@ static void hbytes_t_ustr(Tcl_Obj *o) {
   *str= 0;
 }
 
+void obj_updatestr_array(Tcl_Obj *o, const Byte *byte, int l) {
+  obj_updatestr_array_prefix(o,byte,l,"");
+}
+
+void obj_updatestr_vstringls(Tcl_Obj *o, ...) {
+  va_list al;
+  char *p;
+  const char *part;
+  int l, pl;
+
+  va_start(al,o);
+  for (l=0; (part= va_arg(al, const char*)); )
+    l+= va_arg(al, int);
+  va_end(al);
+  
+  o->length= l;
+  o->bytes= TALLOC(l+1);
+
+  va_start(al,o);
+  for (p= o->bytes; (part= va_arg(al, const char*)); p += pl) {
+    pl= va_arg(al, int);
+    memcpy(p, part, pl);
+  }
+  va_end(al);
+
+  *p= 0;
+}
+
+void obj_updatestr_string(Tcl_Obj *o, const char *str) {
+  obj_updatestr_vstringls(o, str, strlen(str), (char*)0);
+}
+
+static void hbytes_t_ustr(Tcl_Obj *o) {
+  obj_updatestr_array(o,
+		      hbytes_data(OBJ_HBYTES(o)),
+		      hbytes_len(OBJ_HBYTES(o)));
+}
+
 static int hbytes_t_sfa(Tcl_Interp *ip, Tcl_Obj *o) {
   char *str, *ep, *os;
   Byte *startbytes, *bytes;
   int l;
   char cbuf[3];
 
-  os= str= Tcl_GetStringFromObj(o,&l);  assert(str);
-  objfreeir(o);
+  if (o->typePtr == &ulong_type) {
+    uint32_t ul;
+
+    ul= htonl(*(const uint32_t*)&o->internalRep.longValue);
+    hbytes_array(OBJ_HBYTES(o), (const Byte*)&ul, 4);
 
-  if (l & 1) return staticerr(ip, "hbytes: conversion from hex:"
-			      " odd length in hex");
+  } else {
+  
+    os= str= Tcl_GetStringFromObj(o,&l);  assert(str);
+    objfreeir(o);
 
-  startbytes= bytes= hbytes_arrayspace(OBJ_HBYTES(o), l/2);
+    if (l & 1) return staticerr(ip, "hbytes: conversion from hex:"
+				" odd length in hex", "HBYTES SYNTAX");
 
-  cbuf[2]= 0;
-  while (l>0) {
-    cbuf[0]= *str++;
-    cbuf[1]= *str++;
-    *bytes++= strtoul(cbuf,&ep,16);
-    if (ep != cbuf+2) {
-      hbytes_free(OBJ_HBYTES(o));
-      return staticerr(ip, "hbytes: conversion from hex:"
-		       " bad hex digit");
+    startbytes= bytes= hbytes_arrayspace(OBJ_HBYTES(o), l/2);
+
+    cbuf[2]= 0;
+    while (l>0) {
+      cbuf[0]= *str++;
+      cbuf[1]= *str++;
+      *bytes++= strtoul(cbuf,&ep,16);
+      if (ep != cbuf+2) {
+	hbytes_free(OBJ_HBYTES(o));
+	return staticerr(ip, "hbytes: conversion from hex:"
+			 " bad hex digit", "HBYTES SYNTAX");
+      }
+      l -= 2;
     }
-    l -= 2;
+
   }
 
   o->typePtr = &hbytes_type;
@@ -105,58 +184,242 @@ Tcl_ObjType hbytes_type = {
 
 int do_hbytes_raw2h(ClientData cd, Tcl_Interp *ip,
 		    Tcl_Obj *binary, HBytes_Value *result) {
-  const char *str;
+  const unsigned char *str;
   int l;
 
-  str= Tcl_GetStringFromObj(binary,&l);
+  str= Tcl_GetByteArrayFromObj(binary,&l);
   hbytes_array(result, str, l);
   return TCL_OK;
 }
 
 int do_hbytes_h2raw(ClientData cd, Tcl_Interp *ip,
 		    HBytes_Value hex, Tcl_Obj **result) {
-  *result= Tcl_NewStringObj(hbytes_data(&hex), hbytes_len(&hex));
+  *result= Tcl_NewByteArrayObj(hbytes_data(&hex), hbytes_len(&hex));
+  return TCL_OK;
+}
+
+int do_hbytes_length(ClientData cd, Tcl_Interp *ip,
+		     HBytes_Value v, int *result) {
+  *result= hbytes_len(&v);
+  return TCL_OK;
+}
+
+int do_hbytes_random(ClientData cd, Tcl_Interp *ip,
+		     int length, HBytes_Value *result) {
+  Byte *space;
+  int rc;
+  
+  space= hbytes_arrayspace(result, length);
+  rc= get_urandom(ip, space, length);
+  if (rc) { hbytes_free(result); return rc; }
+  return TCL_OK;
+}  
+  
+int do_hbytes_overwrite(ClientData cd, Tcl_Interp *ip,
+			HBytes_Var v, int start, HBytes_Value sub) {
+  int sub_l;
+
+  sub_l= hbytes_len(&sub);
+  if (start < 0)
+    return staticerr(ip, "hbytes overwrite start -ve",
+		     "HBYTES LENGTH RANGE");
+  if (start + sub_l > hbytes_len(v.hb))
+    return staticerr(ip, "hbytes overwrite out of range",
+		     "HBYTES LENGTH UNDERRUN");
+  memcpy(hbytes_data(v.hb) + start, hbytes_data(&sub), sub_l);
+  return TCL_OK;
+}
+
+int do_hbytes_trimleft(ClientData cd, Tcl_Interp *ip, HBytes_Var v) {
+  const Byte *o, *p, *e;
+  o= p= hbytes_data(v.hb);
+  e= p + hbytes_len(v.hb);
+
+  while (p<e && !*p) p++;
+  if (p != o)
+    hbytes_unprepend(v.hb, p-o);
+
+  return TCL_OK;
+}
+
+int do_hbytes_repeat(ClientData cd, Tcl_Interp *ip,
+		     HBytes_Value sub, int count, HBytes_Value *result) {
+  int sub_l;
+  Byte *data;
+  const Byte *sub_d;
+
+  sub_l= hbytes_len(&sub);
+  if (count < 0) return staticerr(ip, "hbytes repeat count -ve",
+				  "HBYTES LENGTH RANGE");
+  if (count > INT_MAX/sub_l) return staticerr(ip, "hbytes repeat too long", 0);
+
+  data= hbytes_arrayspace(result, sub_l*count);
+  sub_d= hbytes_data(&sub);
+  while (count) {
+    memcpy(data, sub_d, sub_l);
+    count--; data += sub_l;
+  }
+  return TCL_OK;
+}  
+
+int do_hbytes_xor(ClientData cd, Tcl_Interp *ip,
+		  HBytes_Var v, HBytes_Value d) {
+  int l;
+  Byte *dest;
+  const Byte *source;
+
+  l= hbytes_len(v.hb);
+  if (hbytes_len(&d) != l) return
+    staticerr(ip, "hbytes xor lengths do not match", "HBYTES LENGTH MISMATCH");
+
+  dest= hbytes_data(v.hb);
+  source= hbytes_data(&d);
+  memxor(dest,source,l);
+  return TCL_OK;
+}
+  
+int do_hbytes_zeroes(ClientData cd, Tcl_Interp *ip,
+		     int length, HBytes_Value *result) {
+  Byte *space;
+  space= hbytes_arrayspace(result, length);
+  memset(space,0,length);
   return TCL_OK;
 }
 
-#if 0
-HC_DEFINE(pkcs5) {
-  static const PadKindInfo padkindinfos[0]= {
-    { "pa", 1, 1 },
-    { "pn", 1, 0 },
-    { "ua", 0, 1 },
-    { "un", 0, 0 },
-    { 0 }
-  };
+int do_hbytes_compare(ClientData cd, Tcl_Interp *ip,
+		      HBytes_Value a, HBytes_Value b, int *result) {
+  int al, bl, minl, r;
 
-  HC_DECLS_HBV;
-  Tcl_Obj *v;
-  int blocksize;
-  const PadKindInfo *pk;
-  const BlockCipherInfo *bc;
+  al= hbytes_len(&a);
+  bl= hbytes_len(&b);
+  minl= al<bl ? al : bl;
 
-  HC_ARG_ENUM(pk, padkindinfos);
-  HC_ARG_HBV;
-  if (!pk->algname) HC_ARG_INTRANGE(blocksize, 1,255);
-  else { HC_ARG_ENUM(bc, blockciphers); blocksize= bc->blocksize; }
-  HC_ARGS_E;
+  r= memcmp(hbytes_data(&a), hbytes_data(&b), minl);
+  
+  if (r<0) *result= -2;
+  else if (r>0) *result= +2;
+  else {
+    if (al<bl) *result= -1;
+    else if (al>bl) *result= +1;
+    else *result= 0;
+  }
+  return TCL_OK;
+}
+
+int do_hbytes_range(ClientData cd, Tcl_Interp *ip,
+		    HBytes_Value v, int start, int size,
+		    HBytes_Value *result) {
+  const Byte *data;
+  int l;
 
-  /* do nothing :-) */
+  l= hbytes_len(&v);
+  if (start<0 || size<0)
+    return staticerr(ip,"hbytes range subscript(s) -ve","HBYTES LENGTH RANGE");
+  if (l<start+size)
+    return staticerr(ip, "hbytes range subscripts too big",
+		     "HBYTES LENGTH UNDERRUN");
 
-  HC_FINI_HBV;
+  data= hbytes_data(&v);
+  hbytes_array(result, data+start, size);
+  return TCL_OK;
 }
-#endif
 
-int do__hbytes(ClientData cd, Tcl_Interp *ip,
-	       const HBytes_SubCommand *subcmd,
-	       int objc, Tcl_Obj *const *objv) {
+/* hbytes representing uint16_t's */
+
+int do_hbytes_h2ushort(ClientData cd, Tcl_Interp *ip,
+		       HBytes_Value hex, long *result) {
+  const Byte *data;
+  int l;
+
+  l= hbytes_len(&hex);
+  if (l>2)
+    return staticerr(ip, "hbytes h2ushort input more than 4 hex digits",
+		     "HBYTES VALUE OVERFLOW");
+
+  data= hbytes_data(&hex);
+  *result= data[l-1] | (l>1 ? data[0]<<8 : 0);
+  return TCL_OK;
+}
+
+int do_hbytes_ushort2h(ClientData cd, Tcl_Interp *ip,
+		       long input, HBytes_Value *result) {
+  uint16_t us;
+
+  if (input > 0x0ffff)
+    return staticerr(ip, "hbytes ushort2h input >2^16",
+		     "HBYTES VALUE OVERFLOW");
+
+  us= htons(input);
+  hbytes_array(result,(const Byte*)&us,2);
+  return TCL_OK;
+}
+
+/* toplevel functions */
+
+int do_toplevel_hbytes(ClientData cd, Tcl_Interp *ip,
+		       const HBytes_SubCommand *subcmd,
+		       int objc, Tcl_Obj *const *objv) {
+  return subcmd->func(0,ip,objc,objv);
+}
+
+int do_toplevel_dgram_socket(ClientData cd, Tcl_Interp *ip,
+			     const DgramSocket_SubCommand *subcmd,
+			     int objc, Tcl_Obj *const *objv) {
+  return subcmd->func(0,ip,objc,objv);
+}
+
+int do_toplevel_tuntap_socket(ClientData cd, Tcl_Interp *ip,
+			     const TunSocket_SubCommand *subcmd,
+			     int objc, Tcl_Obj *const *objv) {
+  return subcmd->func(0,ip,objc,objv);
+}
+
+int do_toplevel_ulong(ClientData cd, Tcl_Interp *ip,
+		      const ULong_SubCommand *subcmd,
+		      int objc, Tcl_Obj *const *objv) {
   return subcmd->func(0,ip,objc,objv);
 }
 
+#define URANDOM "/dev/urandom"
+
+int get_urandom(Tcl_Interp *ip, Byte *buffer, int l) {
+  static FILE *urandom;
+
+  int r, esave;
+
+  if (!urandom) {
+    urandom= fopen(URANDOM,"rb");
+    if (!urandom) return posixerr(ip,errno,"open " URANDOM);
+  }
+  r= fread(buffer,1,l,urandom);
+  if (r==l) return 0;
+
+  esave= errno;
+  fclose(urandom); urandom=0;
+
+  if (ferror(urandom)) {
+    return posixerr(ip,errno,"read " URANDOM);
+  } else {
+    assert(feof(urandom));
+    return staticerr(ip, URANDOM " gave eof!", 0);
+  }
+}
+
 int Hbytes_Init(Tcl_Interp *ip) {
+  const TopLevel_Command *cmd;
+
   Tcl_RegisterObjType(&hbytes_type);
+  Tcl_RegisterObjType(&blockcipherkey_type);
   Tcl_RegisterObjType(&enum_nearlytype);
   Tcl_RegisterObjType(&enum1_nearlytype);
-  Tcl_CreateObjCommand(ip,"hbytes", pa__hbytes,0,0);
+  Tcl_RegisterObjType(&sockaddr_type);
+  Tcl_RegisterObjType(&tabledataid_nearlytype);
+  Tcl_RegisterObjType(&ulong_type);
+
+  for (cmd=toplevel_commands;
+       cmd->name;
+       cmd++)
+    Tcl_CreateObjCommand(ip, cmd->name, cmd->func, 0,0);
+
   return TCL_OK;
 }