b64_encode.c File Reference

Go to the source code of this file.

Functions
void	decodeblock (unsigned char in[], unsigned char **clrstr)
void	b64_decode (char *b64src, char *clrdst)
	b64_decode - decode to a b64 based char
void	encodeblock (unsigned char in[], char b64str[], int len)
void	b64_encode (char *clrstr, char *b64dst)
	b64_encode - encode a b64 based char

Variables
char	b64 [] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"

Function Documentation

b64_decode()

void b64_decode	(	char *	b64src,
		char *	clrdst
	)

b64_decode - decode to a b64 based char

Parameters

*b64src	- the char to decode
*clrdst	- the decoded char

Definition at line 26 of file b64_encode.c.

                                            {
    int c, phase, i;
    unsigned char in[4];
    char *p;
 
    clrdst[0] = '\0';
    phase = 0;
    i=0;
    while(b64src[i]) {
        c = (int) b64src[i];
        if(c == '=') {
            decodeblock(in, (unsigned char **) &clrdst);
            break;
        }
        p = strchr(b64, c);
        if(p) {
            in[phase] = p - b64;
            phase = (phase + 1) % 4;
            if(phase == 0) {
                decodeblock(in, (unsigned char **) &clrdst);
                in[0]=in[1]=in[2]=in[3]=0;
            }
        }
        i++;
    }
}

References b64, and decodeblock().

Referenced by widget_get_scaled_svg(), and widget_get_svg().

b64_encode()

void b64_encode	(	char *	clrstr,
		char *	b64dst
	)

b64_encode - encode a b64 based char

Parameters

*clrstr	- the char to encode
*b64dst	- the encoded char

Definition at line 66 of file b64_encode.c.

                                            {
    unsigned char in[3];
    int i, len = 0;
    int j = 0;
 
    b64dst[0] = '\0';
    while(clrstr[j]) {
        len = 0;
        for(i=0; i<3; i++) {
            in[i] = (unsigned char) clrstr[j];
            if(clrstr[j]) {
                len++;
                j++;
            }
            else in[i] = 0;
        }
        if( len ) {
            encodeblock( in, b64dst, len );
        }
    }
}

References encodeblock().

decodeblock()

void decodeblock	(	unsigned char	in[],
		unsigned char **	clrstr
	)

Definition at line 20 of file b64_encode.c.

                                                             {
     *((*clrstr) ++) = in[0] << 2 | in[1] >> 4;
     *((*clrstr) ++) = in[1] << 4 | in[2] >> 2;
     *((*clrstr) ++) = in[2] << 6 | in[3] >> 0;
}

Referenced by b64_decode().

encodeblock()

void encodeblock	(	unsigned char	in[],
		char	b64str[],
		int	len
	)

Definition at line 54 of file b64_encode.c.

                                                               {
    unsigned char out[5];
    out[0] = b64[ in[0] >> 2 ];
    out[1] = b64[ ((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4) ];
    out[2] = (unsigned char) (len > 1 ? b64[ ((in[1] & 0x0f) << 2) |
                              ((in[2] & 0xc0) >> 6) ] : '=');
    out[3] = (unsigned char) (len > 2 ? b64[ in[2] & 0x3f ] : '=');
    out[4] = '\0';
    strncat(b64str, (char*)out, sizeof(char)*5);
}

References b64.

Referenced by b64_encode().

Variable Documentation

b64

char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"

Definition at line 17 of file b64_encode.c.

Referenced by b64_decode(), and encodeblock().