return done;
}
-
-/*
- * returns length of decoded string in out, or -1 if out was too small
- * according to out_size
- */
-
-LWS_VISIBLE int
-lws_b64_decode_string(const char *in, char *out, int out_size)
-{
- int len;
- int i;
- int done = 0;
- unsigned char v;
- unsigned char quad[4];
-
- while (*in) {
-
- len = 0;
- for (i = 0; i < 4 && *in; i++) {
-
- v = 0;
- while (*in && !v) {
-
- v = *in++;
- v = (v < 43 || v > 122) ? 0 : decode[v - 43];
- if (v)
- v = (v == '$') ? 0 : v - 61;
- if (*in) {
- len++;
- if (v)
- quad[i] = v - 1;
- } else
- quad[i] = 0;
- }
- }
- if (!len)
- continue;
-
- if (out_size < (done + len - 1))
- /* out buffer is too small */
- return -1;
-
- if (len >= 2)
- *out++ = quad[0] << 2 | quad[1] >> 4;
- if (len >= 3)
- *out++ = quad[1] << 4 | quad[2] >> 2;
- if (len >= 4)
- *out++ = ((quad[2] << 6) & 0xc0) | quad[3];
-
- done += len - 1;
- }
-
- if (done + 1 >= out_size)
- return -1;
-
- *out++ = '\0';
-
- return done;
-}
-
-int
-lws_b64_selftest(void)
-{
- char buf[64];
- int n;
- int test;
- static const char * const plaintext[] = {
- "sanity check base 64"
- };
- static const char * const coded[] = {
- "c2FuaXR5IGNoZWNrIGJhc2UgNjQ="
- };
-
- for (test = 0; test < sizeof plaintext / sizeof(plaintext[0]); test++) {
-
- buf[sizeof(buf) - 1] = '\0';
- n = lws_b64_encode_string(plaintext[test],
- strlen(plaintext[test]), buf, sizeof buf);
- if (n != strlen(coded[test]) || strcmp(buf, coded[test])) {
- lwsl_err("Failed lws_b64 encode selftest "
- "%d result '%s' %d\n", test, buf, n);
- return -1;
- }
-
- buf[sizeof(buf) - 1] = '\0';
- n = lws_b64_decode_string(coded[test], buf, sizeof buf);
- if (n != strlen(plaintext[test]) ||
- strcmp(buf, plaintext[test])) {
- lwsl_err("Failed lws_b64 decode selftest "
- "%d result '%s' %d\n", test, buf, n);
- return -1;
- }
- }
-
- return 0;
-}