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Implement base64 encoding

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Will be used for SASL authentication.
This commit is contained in:
Curtis McEnroe 2018-12-03 23:05:01 -05:00
parent 7ea54828a6
commit a8c30b898c
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GPG Key ID: CEA2F97ADCFCD77C
3 changed files with 64 additions and 0 deletions
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1
Makefile
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@ -30,6 +30,7 @@ OBJS += ui.o
OBJS += url.o OBJS += url.o
TESTS += format.t TESTS += format.t
TESTS += pls.t
TESTS += term.t TESTS += term.t
all: tags $(BINS) test all: tags $(BINS) test

3
chat.h
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@ -30,6 +30,8 @@
#define err(...) do { uiHide(); err(__VA_ARGS__); } while (0) #define err(...) do { uiHide(); err(__VA_ARGS__); } while (0)
#define errx(...) do { uiHide(); errx(__VA_ARGS__); } while (0) #define errx(...) do { uiHide(); errx(__VA_ARGS__); } while (0)
typedef unsigned char byte;
struct { struct {
char *host; char *host;
char *port; char *port;
@ -193,6 +195,7 @@ char *awcstombs(const wchar_t *src);
char *awcsntombs(const wchar_t *src, size_t nwc); char *awcsntombs(const wchar_t *src, size_t nwc);
int vaswprintf(wchar_t **ret, const wchar_t *format, va_list ap); int vaswprintf(wchar_t **ret, const wchar_t *format, va_list ap);
int aswprintf(wchar_t **ret, const wchar_t *format, ...); int aswprintf(wchar_t **ret, const wchar_t *format, ...);
char *base64(const byte *src, size_t len);
// HACK: clang won't check wchar_t *format strings. // HACK: clang won't check wchar_t *format strings.
#ifdef NDEBUG #ifdef NDEBUG

60
pls.c
View File

@ -131,3 +131,63 @@ int aswprintf(wchar_t **ret, const wchar_t *format, ...) {
va_end(ap); va_end(ap);
return n; return n;
} }
static const char Base64[64] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
char *base64(const byte *src, size_t len) {
char *dst = malloc(1 + 4 * (len + 2) / 3);
if (!dst) return NULL;
size_t i = 0;
while (len > 2) {
dst[i++] = Base64[0x3F & (src[0] >> 2)];
dst[i++] = Base64[0x3F & (src[0] << 4 | src[1] >> 4)];
dst[i++] = Base64[0x3F & (src[1] << 2 | src[2] >> 6)];
dst[i++] = Base64[0x3F & src[2]];
src += 3;
len -= 3;
}
if (len) {
dst[i++] = Base64[0x3F & (src[0] >> 2)];
if (len > 1) {
dst[i++] = Base64[0x3F & (src[0] << 4 | src[1] >> 4)];
dst[i++] = Base64[0x3F & (src[1] << 2)];
} else {
dst[i++] = Base64[0x3F & (src[0] << 4)];
dst[i++] = '=';
}
dst[i++] = '=';
}
dst[i] = '\0';
return dst;
}
#ifdef TEST
#include <assert.h>
#include <string.h>
int main() {
char *cat = base64((byte *)"cat", 3);
char *ca = base64((byte *)"ca", 2);
char *c = base64((byte *)"c", 1);
assert(cat);
assert(ca);
assert(c);
assert(!strcmp("Y2F0", cat));
assert(!strcmp("Y2E=", ca));
assert(!strcmp("Yw==", c));
free(cat);
free(ca);
free(c);
char *fzf = base64((byte []) { 0xFF, 0x00, 0xFF }, 3);
char *zfz = base64((byte []) { 0x00, 0xFF, 0x00 }, 3);
assert(fzf);
assert(zfz);
assert(!strcmp("/wD/", fzf));
assert(!strcmp("AP8A", zfz));
free(fzf);
free(zfz);
}
#endif