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SMTP Client

, 16 Jul 2010
The CSmtp class allows to send emails with attachments. It only provides the AUTH LOGIN authentication.
CSmtp.zip
CSmtp
CSmtp.dsp
CSmtp.dsw
CSmtp_v1_1.zip
CSmtp.dsp
CSmtp.dsw
CSmtp_v1_2.zip
CSmtp.dsp
CSmtp.dsw
CSmtp_v1_3.zip
CSmtp_v1_3
CSmtp.dsp
CSmtp.dsw
CSmtp_v1_4.zip
CSmtp_v1_4
CSmtp.dsp
CSmtp.dsw
CSmtp.ncb
CSmtp.opt
CSmtp.plg
CSmtp_v1_5.zip
CSmtp_v1_5
CSmtp.dsp
CSmtp.dsw
CSmtp.ncb
CSmtp.opt
CSmtp.plg
CSmtp_v1_6.zip
CSmtp_v1_6
CSmtp.dsp
CSmtp.dsw
CSmtp.opt
CSmtp.plg
CSmtp_v1_7.zip
CSmtp_v1_7
CSmtp.dsp
CSmtp.dsw
CSmtp.ncb
CSmtp.opt
CSmtp_v1_8a.zip
CSmtp_v1_8a
CSmtp.dsp
CSmtp.dsw
CSmtp_v1_8b.zip
CSmtp_v1_8b
makefile
/* 
   base64.cpp and base64.h

   Copyright (C) 2004-2008 Ren� Nyffenegger

   This source code is provided 'as-is', without any express or implied
   warranty. In no event will the author be held liable for any damages
   arising from the use of this software.

   Permission is granted to anyone to use this software for any purpose,
   including commercial applications, and to alter it and redistribute it
   freely, subject to the following restrictions:

   1. The origin of this source code must not be misrepresented; you must not
      claim that you wrote the original source code. If you use this source code
      in a product, an acknowledgment in the product documentation would be
      appreciated but is not required.

   2. Altered source versions must be plainly marked as such, and must not be
      misrepresented as being the original source code.

   3. This notice may not be removed or altered from any source distribution.

   Ren� Nyffenegger rene.nyffenegger@adp-gmbh.ch

*/

#include "base64.h"
#include <iostream>

static const std::string base64_chars = 
             "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
             "abcdefghijklmnopqrstuvwxyz"
             "0123456789+/";


static inline bool is_base64(unsigned char c) 
{
  return (isalnum(c) || (c == '+') || (c == '/'));
}

std::string base64_encode(unsigned char const* bytes_to_encode, unsigned int in_len) 
{
  std::string ret;
  int i = 0, j = 0;
  unsigned char char_array_3[3], char_array_4[4];

  while (in_len--)
	{
    char_array_3[i++] = *(bytes_to_encode++);
    if (i == 3) 
		{
      char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
      char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
      char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
      char_array_4[3] = char_array_3[2] & 0x3f;

      for(i = 0; (i <4) ; i++)
        ret += base64_chars[char_array_4[i]];
      i = 0;
    }
  }

  if (i)
  {
    for(j = i; j < 3; j++)
      char_array_3[j] = '\0';

    char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
    char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
    char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
    char_array_4[3] = char_array_3[2] & 0x3f;

    for (j = 0; (j < i + 1); j++)
      ret += base64_chars[char_array_4[j]];

    while((i++ < 3))
      ret += '=';

  }

  return ret;

}

std::string base64_decode(std::string const& encoded_string) 
{
  int in_len = encoded_string.size();
  int i = 0, j = 0, in_ = 0;
  unsigned char char_array_4[4], char_array_3[3];
  std::string ret;

  while (in_len-- && ( encoded_string[in_] != '=') && is_base64(encoded_string[in_])) 
	{
    char_array_4[i++] = encoded_string[in_]; in_++;
    if (i ==4) {
      for (i = 0; i <4; i++)
        char_array_4[i] = base64_chars.find(char_array_4[i]);

      char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
      char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
      char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];

      for (i = 0; (i < 3); i++)
        ret += char_array_3[i];
      i = 0;
    }
  }

  if (i) 
	{
    for (j = i; j <4; j++)
      char_array_4[j] = 0;

    for (j = 0; j <4; j++)
      char_array_4[j] = base64_chars.find(char_array_4[j]);

    char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
    char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
    char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];

    for (j = 0; (j < i - 1); j++) 
			ret += char_array_3[j];
  }

  return ret;
}

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About the Author

Jakub Piwowarczyk
Engineer Technical University of Lodz
Poland Poland
No Biography provided

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