1 unsigned char * base64 = (unsigned char *)"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; 2 3 CString ToolFiles::base64encode(CString src, int srclen) 4 { 5 int n, buflen, i, j; 6 static unsigned char *dst; 7 CString buf = src; 8 buflen = n = srclen; 9 dst = (unsigned char*)malloc(buflen / 3 * 4 + 3); 10 memset(dst, 0, buflen / 3 * 4 + 3); 11 for (i = 0, j = 0; i <= buflen - 3; i += 3, j += 4) { 12 dst[j] = (buf[i] & 0xFC) >> 2; 13 dst[j + 1] = ((buf[i] & 0x03) << 4) + ((buf[i + 1] & 0xF0) >> 4); 14 dst[j + 2] = ((buf[i + 1] & 0x0F) << 2) + ((buf[i + 2] & 0xC0) >> 6); 15 dst[j + 3] = buf[i + 2] & 0x3F; 16 } 17 if (n % 3 == 1) { 18 dst[j] = (buf[i] & 0xFC) >> 2; 19 dst[j + 1] = ((buf[i] & 0x03) << 4); 20 dst[j + 2] = 64; 21 dst[j + 3] = 64; 22 j += 4; 23 } 24 else if (n % 3 == 2) { 25 dst[j] = (buf[i] & 0xFC) >> 2; 26 dst[j + 1] = ((buf[i] & 0x03) << 4) + ((buf[i + 1] & 0xF0) >> 4); 27 dst[j + 2] = ((buf[i + 1] & 0x0F) << 2); 28 dst[j + 3] = 64; 29 j += 4; 30 } 31 for (i = 0; i < j; i++) 32 dst[i] = base64[(int)dst[i]]; 33 dst[j] = 0; 34 return CString(dst); 35 } 36 37 CString ToolFiles::base64decode(CString inpt, int * len) 38 { 39 int n, i, j, pad; 40 unsigned char *p; 41 static unsigned char *dst; 42 unsigned char * src; 43 *len = 0; 44 pad = 0; 45 n = inpt.GetLength(); 46 src = new unsigned char[n]; 47 for (i = 0; i < n; i++) 48 src[i] = inpt[i]; 49 50 while (n>0 && src[n - 1] == '=') { 51 src[n - 1] = 0; 52 pad++; 53 n--; 54 } 55 for (i = 0; i < n; i++) { 56 p = (unsigned char *)strchr((const char *)base64, (int)src[i]); 57 if (!p) 58 break; 59 src[i] = p - (unsigned char *)base64; 60 } 61 62 dst = (unsigned char *)malloc(n * 3 / 4 + 1); 63 memset(dst, 0, n * 3 / 4 + 1); 64 for (i = 0, j = 0; i < n; i += 4, j += 3) { 65 dst[j] = (src[i] << 2) + ((src[i + 1] & 0x30) >> 4); 66 dst[j + 1] = ((src[i + 1] & 0x0F) << 4) + ((src[i + 2] & 0x3C) >> 2); 67 dst[j + 2] = ((src[i + 2] & 0x03) << 6) + src[i + 3]; 68 *len += 3; 69 } 70 *len -= pad; 71 return CString(dst); 72 }
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