static int
initCrypt(FILE *eifp)
{
int r = 0;
gcry_error_t gcryError;
char iv[4096];
blkLength = gcry_cipher_get_algo_blklen(cry_algo);
if(blkLength > sizeof(iv)) {
fprintf(stderr, "internal error[%s:%d]: block length %d too large for "
"iv buffer\n", __FILE__, __LINE__, blkLength);
r = 1; goto done;
}
if((r = eiGetIV(eifp, iv, blkLength)) != 0) goto done;
size_t keyLength = gcry_cipher_get_algo_keylen(cry_algo);
if(strlen(cry_key) != keyLength) {
fprintf(stderr, "invalid key length; key is %u characters, but "
"exactly %u characters are required\n", cry_keylen,
keyLength);
r = 1; goto done;
}
gcryError = gcry_cipher_open(&gcry_chd, cry_algo, cry_mode, 0);
if (gcryError) {
printf("gcry_cipher_open failed: %s/%s\n",
gcry_strsource(gcryError),
gcry_strerror(gcryError));
r = 1; goto done;
}
gcryError = gcry_cipher_setkey(gcry_chd, cry_key, keyLength);
if (gcryError) {
printf("gcry_cipher_setkey failed: %s/%s\n",
gcry_strsource(gcryError),
gcry_strerror(gcryError));
r = 1; goto done;
}
gcryError = gcry_cipher_setiv(gcry_chd, iv, blkLength);
if (gcryError) {
printf("gcry_cipher_setiv failed: %s/%s\n",
gcry_strsource(gcryError),
gcry_strerror(gcryError));
r = 1; goto done;
}
done: return r;
}
static inline rsRetVal
readIV(gcryfile gf, uchar **iv)
{
rsRetVal localRet;
DEFiRet;
if(gf->fd == -1) {
while(gf->fd == -1) {
localRet = eiOpenRead(gf);
if(localRet == RS_RET_EI_NO_EXISTS) {
/* wait until it is created */
srSleep(0, 10000);
} else {
CHKiRet(localRet);
}
}
CHKiRet(eiCheckFiletype(gf));
}
*iv = malloc(gf->blkLength); /* do NOT zero-out! */
CHKiRet(eiGetIV(gf, *iv, (size_t) gf->blkLength));
finalize_it:
RETiRet;
}
