/* Ensure a context left lying around from last time is cleared
* (the previous check attempted to avoid this if the same
* ENGINE and EVP_CIPHER could be used). */
- EVP_CIPHER_CTX_cleanup(ctx);
-
- /* Restore encrypt field: it is zeroed by cleanup */
- ctx->encrypt = enc;
+ if (ctx->cipher)
+ {
+ unsigned long flags = ctx->flags;
+ EVP_CIPHER_CTX_cleanup(ctx);
+ /* Restore encrypt and flags */
+ ctx->encrypt = enc;
+ ctx->flags = flags;
+ }
#ifndef OPENSSL_NO_ENGINE
if(impl)
{
ctx->cipher_data = NULL;
}
ctx->key_len = cipher->key_len;
- ctx->flags = 0;
+ /* Preserve wrap enable flag, zero everything else */
+ ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT)
{
if(!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL))
|| ctx->cipher->block_size == 8
|| ctx->cipher->block_size == 16);
+ if(!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
+ && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE)
+ {
+ EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED);
+ return 0;
+ }
+
if(!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
switch(EVP_CIPHER_CTX_mode(ctx)) {
break;
case EVP_CIPH_CTR_MODE:
+ ctx->num = 0;
/* Don't reuse IV for CTR mode */
if(iv)
memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx));
break;
}
}
+
if(key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
if(!ctx->cipher->init(ctx,key,iv,enc)) return 0;