// parse digest block from c1s1.
// if created, user must free it by srs_digest_block_free
// @c1s1_digest_bytes the digest start bytes, maybe c1s1 or c1s1+764
int srs_digest_block_parse(digest_block* digest, char* c1s1_digest_bytes)
{
int ret = ERROR_SUCCESS;
char* pp = c1s1_digest_bytes;
digest->offset = __srs_stream_read_4bytes(pp);
pp += sizeof(int32_t);
digest->random0 = NULL;
digest->random1 = NULL;
int offset = srs_digest_block_get_offset(digest);
srs_assert(offset >= 0);
digest->random0_size = offset;
if (digest->random0_size > 0) {
digest->random0 = new char[digest->random0_size];
memcpy(digest->random0, pp, digest->random0_size);
}
pp += digest->random0_size;
memcpy(digest->digest, pp, sizeof(digest->digest));
pp += sizeof(digest->digest);
digest->random1_size = 764 - 4 - offset - 32;
if (digest->random1_size > 0) {
digest->random1 = new char[digest->random1_size];
memcpy(digest->random1, pp, digest->random1_size);
}
return ret;
}
// create new digest block data.
// if created, user must free it by srs_digest_block_free
void srs_digest_block_init(digest_block* digest)
{
digest->offset = (int32_t)rand();
digest->random0 = NULL;
digest->random1 = NULL;
int offset = srs_digest_block_get_offset(digest);
srs_assert(offset >= 0);
digest->random0_size = offset;
if (digest->random0_size > 0) {
digest->random0 = new char[digest->random0_size];
srs_random_generate(digest->random0, digest->random0_size);
snprintf(digest->random0, digest->random0_size, "%s", RTMP_SIG_SRS_HANDSHAKE);
}
srs_random_generate(digest->digest, sizeof(digest->digest));
digest->random1_size = 764 - 4 - offset - 32;
if (digest->random1_size > 0) {
digest->random1 = new char[digest->random1_size];
srs_random_generate(digest->random1, digest->random1_size);
snprintf(digest->random1, digest->random1_size, "%s", RTMP_SIG_SRS_HANDSHAKE);
}
}
