init commitHEADmaster

1 files changed, 143 insertions, 0 deletions

diff --git a/entry/src/base64.cpp b/entry/src/base64.cpp
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+++ b/entry/src/base64.cpp
@@ -0,0 +1,143 @@
+  
+/*
+	base64.c - by Joe DF ([email protected])
+	Released under the MIT License
+	
+	See "base64.h", for more information.
+	
+	Thank you for inspiration:
+	http://www.codeproject.com/Tips/813146/Fast-base-functions-for-encode-decode
+*/
+
+#include "base64.h"
+#include <stdio.h>
+#include <algorithm>
+
+//Base64 char table - used internally for encoding
+unsigned char b64_chr[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+unsigned int b64_int(unsigned int ch) {
+
+	// ASCII to base64_int
+	// 65-90  Upper Case  >>  0-25
+	// 97-122 Lower Case  >>  26-51
+	// 48-57  Numbers     >>  52-61
+	// 43     Plus (+)    >>  62
+	// 47     Slash (/)   >>  63
+	// 61     Equal (=)   >>  64~
+	if (ch==43)
+	return 62;
+	if (ch==47)
+	return 63;
+	if (ch==61)
+	return 64;
+	if ((ch>47) && (ch<58))
+	return ch + 4;
+	if ((ch>64) && (ch<91))
+	return ch - 'A';
+	if ((ch>96) && (ch<123))
+	return (ch - 'a') + 26;
+	return 0;
+}
+
+/*
+unsigned int b64e_size(unsigned int in_size) {
+
+	// size equals 4*floor((1/3)*(in_size+2));
+	int i, j = 0;
+	for (i=0;i<in_size;i++) {
+		if (i % 3 == 0)
+		j += 1;
+	}
+	return (4*j);
+}
+*/
+
+unsigned int b64d_size(unsigned int in_size) {
+
+	return ((3*in_size)/4);
+}
+
+unsigned int b64_encode(const unsigned char* in, unsigned int in_len, unsigned char* out) {
+
+	unsigned int i=0, j=0, k=0, s[3];
+	
+	for (i=0;i<in_len;i++) {
+		s[j++]=*(in+i);
+		if (j==3) {
+			out[k+0] = b64_chr[ (s[0]&255)>>2 ];
+			out[k+1] = b64_chr[ ((s[0]&0x03)<<4)+((s[1]&0xF0)>>4) ];
+			out[k+2] = b64_chr[ ((s[1]&0x0F)<<2)+((s[2]&0xC0)>>6) ];
+			out[k+3] = b64_chr[ s[2]&0x3F ];
+			j=0; k+=4;
+		}
+	}
+	
+	if (j) {
+		if (j==1)
+			s[1] = 0;
+		out[k+0] = b64_chr[ (s[0]&255)>>2 ];
+		out[k+1] = b64_chr[ ((s[0]&0x03)<<4)+((s[1]&0xF0)>>4) ];
+		if (j==2)
+			out[k+2] = b64_chr[ ((s[1]&0x0F)<<2) ];
+		else
+			out[k+2] = '=';
+		out[k+3] = '=';
+		k+=4;
+	}
+
+	out[k] = '\0';
+	
+	return k;
+}
+
+unsigned int b64_decode(const unsigned char* in, unsigned int in_len, unsigned char* out) {
+
+	unsigned int i=0, j=0, k=0, s[4];
+	
+	for (i=0;i<in_len;i++) {
+		s[j++]=b64_int(*(in+i));
+		if (j==4) {
+			out[k+0] = ((s[0]&255)<<2)+((s[1]&0x30)>>4);
+			if (s[2]!=64) {
+				out[k+1] = ((s[1]&0x0F)<<4)+((s[2]&0x3C)>>2);
+				if ((s[3]!=64)) {
+					out[k+2] = ((s[2]&0x03)<<6)+(s[3]); k+=3;
+				} else {
+					k+=2;
+				}
+			} else {
+				k+=1;
+			}
+			j=0;
+		}
+	}
+	return k;
+}
+
+int test(){
+    unsigned char in_buff[100] = "ab\0d\0fghi";
+    unsigned char out_buff[100];
+    unsigned char *in = in_buff;
+    unsigned char *out = out_buff;
+    int in_len = 10;
+    int out_len = b64_encode(in, in_len, out);
+    printf("encode: out_len = %d\n", out_len);
+    for(int i = 0; i < out_len; i++){
+        printf("%c ", out[i]);
+    }
+    printf("\n");
+    std::swap(in, out);
+    in_len = out_len;
+    out_len = b64_decode(in, in_len, out);
+    printf("decode: out_len = %d\n", out_len);
+    for(int i = 0; i < out_len; i++){
+        printf("%c ", out[i]);
+    }
+    printf("\n");
+    return 0;
+}
+
+int main(){
+    test();
+}
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