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#include "Encodings.h"
#include "base64.h"
int EncodingParse(const char *Str)
{
if (strcmp(Str,"8")==0) return(ENCODE_OCTAL);
if (strncmp(Str,"oct",3)==0) return(ENCODE_OCTAL);
if (strcmp(Str,"10")==0) return(ENCODE_DECIMAL);
if (strncmp(Str,"dec",3)==0) return(ENCODE_DECIMAL);
if (strcmp(Str,"16")==0) return(ENCODE_HEX);
if (strncmp(Str,"hex",3)==0) return(ENCODE_HEX);
if (strcmp(Str,"64")==0) return(ENCODE_BASE64);
if (strcmp(Str,"b64")==0) return(ENCODE_BASE64);
if (strcmp(Str,"base64")==0) return(ENCODE_BASE64);
if (strcmp(Str,"i64")==0) return(ENCODE_IBASE64);
if (strcmp(Str,"p64")==0) return(ENCODE_PBASE64);
if (strncmp(Str,"xx",2)==0) return(ENCODE_XXENC);
if (strncmp(Str,"uu",2)==0) return(ENCODE_UUENC);
if (strcmp(Str,"crypt")==0) return(ENCODE_CRYPT);
return(ENCODE_NONE);
}
char *Ascii85(char *RetStr, const char *Bytes, int ilen, const char *CharMap)
{
const char *ptr, *block, *end;
uint32_t val, mod;
int olen=0, i;
char Buff[6];
end=Bytes+ilen;
for (ptr=Bytes; ptr < end; )
{
block=ptr;
val = ((*ptr & 0xFF) << 24);
ptr++;
if (ptr < end)
{
val |= ((*ptr & 0xFF) << 16);
ptr++;
}
if (ptr < end)
{
val |= ((*ptr & 0xFF) << 8);
ptr++;
}
if (ptr < end)
{
val |= (*ptr & 0xFF);
ptr++;
}
if (val==0) strcpy(Buff,"z");
else for (i=4; i >-1; i--)
{
mod=val % 85;
val /= 85;
Buff[i]=CharMap[mod & 0xFF];
}
//we only add as many characters as we encoded
//so for the last chracter
RetStr=CatStrLen(RetStr,Buff,ptr-block);
}
return(RetStr);
}
char *EncodeBytes(char *Buffer, const char *Bytes, int len, int Encoding)
{
char *Tempstr=NULL, *RetStr=NULL;
int i;
RetStr=CopyStr(Buffer,"");
switch (Encoding)
{
case ENCODE_BASE64:
RetStr=SetStrLen(RetStr,len * 4);
to64frombits((unsigned char *) RetStr,(unsigned char *) Bytes,len);
break;
break;
case ENCODE_IBASE64:
RetStr=SetStrLen(RetStr,len * 4);
Radix64frombits((unsigned char *) RetStr,(unsigned char *) Bytes,len,IBASE64_CHARS,'\0');
break;
break;
case ENCODE_PBASE64:
RetStr=SetStrLen(RetStr,len * 4);
Radix64frombits((unsigned char *) RetStr,(unsigned char *) Bytes,len,PBASE64_CHARS,'\0');
break;
break;
case ENCODE_CRYPT:
RetStr=SetStrLen(RetStr,len * 4);
Radix64frombits((unsigned char *) RetStr,(unsigned char *) Bytes,len,CRYPT_CHARS,'\0');
break;
break;
case ENCODE_XXENC:
RetStr=SetStrLen(RetStr,len * 4);
Radix64frombits((unsigned char *) RetStr,(unsigned char *) Bytes,len,XXENC_CHARS,'+');
break;
break;
case ENCODE_UUENC:
RetStr=SetStrLen(RetStr,len * 4);
Radix64frombits((unsigned char *) RetStr,(unsigned char *) Bytes,len,UUENC_CHARS,'\'');
break;
break;
case ENCODE_ASCII85:
RetStr=Ascii85(RetStr,Bytes,len,ASCII85_CHARS);
break;
break;
case ENCODE_Z85:
RetStr=Ascii85(RetStr,Bytes,len,Z85_CHARS);
break;
break;
case ENCODE_OCTAL:
for (i=0; i < len; i++)
{
Tempstr=FormatStr(Tempstr,"%03o",Bytes[i] & 255);
RetStr=CatStr(RetStr,Tempstr);
}
break;
case ENCODE_DECIMAL:
for (i=0; i < len; i++)
{
Tempstr=FormatStr(Tempstr,"%03d",Bytes[i] & 255);
RetStr=CatStr(RetStr,Tempstr);
}
break;
case ENCODE_HEX:
for (i=0; i < len; i++)
{
Tempstr=FormatStr(Tempstr,"%02x",Bytes[i] & 255);
RetStr=CatStr(RetStr,Tempstr);
}
break;
case ENCODE_HEXUPPER:
for (i=0; i < len; i++)
{
Tempstr=FormatStr(Tempstr,"%02X",Bytes[i] & 255);
RetStr=CatStr(RetStr,Tempstr);
}
break;
default:
RetStr=SetStrLen(RetStr,len );
memcpy(RetStr,Bytes,len);
RetStr[len]='\0';
break;
}
DestroyString(Tempstr);
return(RetStr);
}
int DecodeBytes(char **Return, const char *Text, int Encoding)
{
long len=0, val, i=0;
const char *ptr, *end;
len=StrLen(Text);
*Return=SetStrLen(*Return,len);
memset(*Return,0,len);
switch (Encoding)
{
case ENCODE_BASE64:
len=Radix64tobits(*Return,Text,BASE64_CHARS,'=');
break;
break;
case ENCODE_IBASE64:
len=Radix64tobits(*Return,Text,IBASE64_CHARS,'\0');
break;
break;
case ENCODE_PBASE64:
len=Radix64tobits(*Return,Text,PBASE64_CHARS,'\0');
break;
break;
case ENCODE_CRYPT:
len=Radix64tobits(*Return,Text,CRYPT_CHARS,'\0');
break;
break;
case ENCODE_XXENC:
len=Radix64tobits(*Return,Text,XXENC_CHARS,'+');
break;
break;
case ENCODE_UUENC:
len=Radix64tobits(*Return,Text,UUENC_CHARS,'\'');
break;
break;
case ENCODE_ASCII85:
//RetStr=Ascii85(RetStr,Bytes,len,ASCII85_CHARS); break;
break;
case ENCODE_Z85:
//RetStr=Ascii85(RetStr,Bytes,len,Z85_CHARS); break;
break;
case ENCODE_OCTAL:
ptr=Text;
end=ptr+len;
while (ptr < end)
{
strntol(&ptr, 3, 8, &val);
(*Return)[i]=val & 0xFF;
i++;
}
len=i;
break;
case ENCODE_DECIMAL:
ptr=Text;
end=ptr+len;
while (ptr < end)
{
strntol(&ptr, 3, 10, &val);
(*Return)[i]=val & 0xFF;
i++;
}
len=i;
break;
case ENCODE_HEX:
case ENCODE_HEXUPPER:
ptr=Text;
end=ptr+len;
while (ptr < end)
{
strntol(&ptr, 2, 16, &val);
(*Return)[i]=val & 0xFF;
i++;
}
len=i;
break;
default:
break;
}
return(len);
}
char *DecodeToText(char *RetStr, const char *Text, int Encoding)
{
DecodeBytes(&RetStr, Text, Encoding);
return(RetStr);
}
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