void
base64_encode (const char *const src, size_t srclen, char *const out, size_t *const outlen)
{
size_t s;
size_t t;
struct base64_state state;
/* Init the stream reader: */
base64_stream_encode_init(&state);
/* Feed the whole string to the stream reader: */
base64_stream_encode(&state, src, srclen, out, &s);
/* Finalize the stream by writing trailer if any: */
base64_stream_encode_final(&state, out + s, &t);
/* Final output length is stream length plus tail: */
*outlen = s + t;
}
static int
test_streaming (int flags)
{
bool fail = false;
char chr[256];
char ref[400], enc[400];
size_t reflen;
struct base64_state state;
// Fill array with all characters 0..255:
for (int i = 0; i < 256; i++)
chr[i] = (unsigned char)i;
// Create reference base64 encoding:
base64_encode(chr, 256, ref, &reflen, BASE64_FORCE_PLAIN);
// Encode the table with various block sizes and compare to reference:
for (size_t bs = 1; bs < 255; bs++)
{
size_t inpos = 0;
size_t partlen = 0;
size_t enclen = 0;
base64_stream_encode_init(&state, flags);
memset(enc, 0, 400);
for (;;) {
base64_stream_encode(&state, &chr[inpos], (inpos + bs > 256) ? 256 - inpos : bs, &enc[enclen], &partlen);
enclen += partlen;
if (inpos + bs > 256) {
break;
}
inpos += bs;
}
base64_stream_encode_final(&state, &enc[enclen], &partlen);
enclen += partlen;
if (enclen != reflen) {
printf("FAIL: stream encoding gave incorrect size: "
"%lu instead of %lu\n",
(unsigned long)enclen,
(unsigned long)reflen
);
fail = true;
}
if (strncmp(ref, enc, reflen) != 0) {
printf("FAIL: stream encoding with blocksize %lu failed\n",
(unsigned long)bs
);
fail = true;
}
}
// Decode the reference encoding with various block sizes and
// compare to input char table:
for (size_t bs = 1; bs < 255; bs++)
{
size_t inpos = 0;
size_t partlen = 0;
size_t enclen = 0;
base64_stream_decode_init(&state, flags);
memset(enc, 0, 400);
while (base64_stream_decode(&state, &ref[inpos], (inpos + bs > reflen) ? reflen - inpos : bs, &enc[enclen], &partlen)) {
enclen += partlen;
inpos += bs;
}
if (enclen != 256) {
printf("FAIL: stream decoding gave incorrect size: "
"%lu instead of 255\n",
(unsigned long)enclen
);
fail = true;
}
if (strncmp(chr, enc, 256) != 0) {
printf("FAIL: stream decoding with blocksize %lu failed\n",
(unsigned long)bs
);
fail = true;
}
}
return fail;
}