- input = auth;
- for (;;) {
- if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
- !EVP_DigestUpdate(&mdctx, (uint8_t *)shared, sharedlen) ||
- !EVP_DigestUpdate(&mdctx, input, 16) ||
- !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
- md_len != 16) {
- pthread_mutex_unlock(&lock);
- return 0;
- }
- for (i = 0; i < 16; i++)
- out[offset + i] = hash[i] ^ in[offset + i];
- input = out + offset - 16;
- offset += 16;
- if (offset == len)
- break;
- }
- memcpy(in, out, len);
- pthread_mutex_unlock(&lock);
- return 1;
-}
-
-int pwddecrypt(uint8_t *in, uint8_t len, char *shared, uint8_t sharedlen, uint8_t *auth) {
- static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
- static unsigned char first = 1;
- static EVP_MD_CTX mdctx;
- unsigned char hash[EVP_MAX_MD_SIZE], *input;
- unsigned int md_len;
- uint8_t i, offset = 0, out[128];
-