int
px_find_combo(const char *name, PX_Combo **res)
{
int err;
char *buf,
*s_cipher,
*s_pad;
PX_Combo *cx;
cx = px_alloc(sizeof(*cx));
memset(cx, 0, sizeof(*cx));
buf = px_alloc(strlen(name) + 1);
strcpy(buf, name);
err = parse_cipher_name(buf, &s_cipher, &s_pad);
if (err)
{
px_free(buf);
px_free(cx);
return err;
}
err = px_find_cipher(s_cipher, &cx->cipher);
if (err)
goto err1;
if (s_pad != NULL)
{
if (strcmp(s_pad, "pkcs") == 0)
cx->padding = 1;
else if (strcmp(s_pad, "none") == 0)
cx->padding = 0;
else
goto err1;
}
else
cx->padding = 1;
cx->init = combo_init;
cx->encrypt = combo_encrypt;
cx->decrypt = combo_decrypt;
cx->encrypt_len = combo_encrypt_len;
cx->decrypt_len = combo_decrypt_len;
cx->free = combo_free;
px_free(buf);
*res = cx;
return 0;
err1:
if (cx->cipher)
px_cipher_free(cx->cipher);
px_free(cx);
px_free(buf);
return PXE_NO_CIPHER;
}
void
pgp_cfb_free(PGP_CFB *ctx)
{
px_cipher_free(ctx->ciph);
px_memset(ctx, 0, sizeof(*ctx));
px_free(ctx);
}
int
pgp_cfb_create(PGP_CFB **ctx_p, int algo, const uint8 *key, int key_len,
int resync, uint8 *iv)
{
int res;
PX_Cipher *ciph;
PGP_CFB *ctx;
res = pgp_load_cipher(algo, &ciph);
if (res < 0)
return res;
res = px_cipher_init(ciph, key, key_len, NULL);
if (res < 0)
{
px_cipher_free(ciph);
return res;
}
ctx = px_alloc(sizeof(*ctx));
memset(ctx, 0, sizeof(*ctx));
ctx->ciph = ciph;
ctx->block_size = px_cipher_block_size(ciph);
ctx->resync = resync;
if (iv)
memcpy(ctx->fr, iv, ctx->block_size);
*ctx_p = ctx;
return 0;
}
static void
combo_free(PX_Combo *cx)
{
if (cx->cipher)
px_cipher_free(cx->cipher);
px_memset(cx, 0, sizeof(*cx));
px_free(cx);
}
