Adapt the internal EVP routines to opaque EVP_CIPHER

[openssl.git] / crypto / evp / evp_enc.c

diff --git a/crypto/evp/evp_enc.c b/crypto/evp/evp_enc.c
index 242874c5f646237ba15039280c97b3e8cfe669bb..32e124e6500986b9db14a04bd8a0bf311b439520 100644 (file)
--- a/crypto/evp/evp_enc.c
+++ b/crypto/evp/evp_enc.c
@@ -57,35 +57,55 @@
  */
 
 #include <stdio.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
 #include <openssl/evp.h>
 #include <openssl/err.h>
 #include <openssl/rand.h>
 #ifndef OPENSSL_NO_ENGINE
 # include <openssl/engine.h>
 #endif
+#include "internal/evp_int.h"
 #include "evp_locl.h"
 
-const char EVP_version[] = "EVP" OPENSSL_VERSION_PTEXT;
-
-void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
+int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *c)
 {
-    memset(ctx, 0, sizeof(*ctx));
+    if (c == NULL)
+        return 1;
+    if (c->cipher != NULL) {
+        if (c->cipher->cleanup && !c->cipher->cleanup(c))
+            return 0;
+        /* Cleanse cipher context data */
+        if (c->cipher_data && c->cipher->ctx_size)
+            OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
+    }
+    OPENSSL_free(c->cipher_data);
+#ifndef OPENSSL_NO_ENGINE
+    if (c->engine)
+        /*
+         * The EVP_CIPHER we used belongs to an ENGINE, release the
+         * functional reference we held for this reason.
+         */
+        ENGINE_finish(c->engine);
+#endif
+    memset(c, 0, sizeof(*c));
+    return 1;
 }
 
 EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
 {
-    EVP_CIPHER_CTX *ctx = OPENSSL_malloc(sizeof(*ctx));
-    if (ctx)
-        EVP_CIPHER_CTX_init(ctx);
-    return ctx;
+    return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX));
+}
+
+void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
+{
+    EVP_CIPHER_CTX_reset(ctx);
+    OPENSSL_free(ctx);
 }
 
 int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
                    const unsigned char *key, const unsigned char *iv, int enc)
 {
-    if (cipher)
-        EVP_CIPHER_CTX_init(ctx);
+    EVP_CIPHER_CTX_reset(ctx);
     return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc);
 }
 
@@ -107,10 +127,8 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
      * previous handle, re-querying for an ENGINE, and having a
      * reinitialisation, when it may all be unecessary.
      */
-    if (ctx->engine && ctx->cipher && (!cipher ||
-                                       (cipher
-                                        && (cipher->nid ==
-                                            ctx->cipher->nid))))
+    if (ctx->engine && ctx->cipher
+        && (!cipher || (cipher && (cipher->nid == ctx->cipher->nid))))
         goto skip_to_init;
 #endif
     if (cipher) {
@@ -121,7 +139,7 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
          */
         if (ctx->cipher) {
             unsigned long flags = ctx->flags;
-            EVP_CIPHER_CTX_cleanup(ctx);
+            EVP_CIPHER_CTX_reset(ctx);
             /* Restore encrypt and flags */
             ctx->encrypt = enc;
             ctx->flags = flags;
@@ -160,8 +178,8 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
 
         ctx->cipher = cipher;
         if (ctx->cipher->ctx_size) {
-            ctx->cipher_data = OPENSSL_malloc(ctx->cipher->ctx_size);
-            if (!ctx->cipher_data) {
+            ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
+            if (ctx->cipher_data == NULL) {
                 EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE);
                 return 0;
             }
@@ -195,7 +213,7 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
         return 0;
     }
 
-    if (!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
+    if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) {
         switch (EVP_CIPHER_CTX_mode(ctx)) {
 
         case EVP_CIPH_STREAM_CIPHER:
@@ -519,36 +537,6 @@ int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
     return (1);
 }
 
-void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
-{
-    EVP_CIPHER_CTX_cleanup(ctx);
-    OPENSSL_free(ctx);
-}
-
-int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
-{
-    if (!c)
-        return 0;
-    if (c->cipher != NULL) {
-        if (c->cipher->cleanup && !c->cipher->cleanup(c))
-            return 0;
-        /* Cleanse cipher context data */
-        if (c->cipher_data)
-            OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
-    }
-    OPENSSL_free(c->cipher_data);
-#ifndef OPENSSL_NO_ENGINE
-    if (c->engine)
-        /*
-         * The EVP_CIPHER we used belongs to an ENGINE, release the
-         * functional reference we held for this reason.
-         */
-        ENGINE_finish(c->engine);
-#endif
-    memset(c, 0, sizeof(*c));
-    return 1;
-}
-
 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
 {
     if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
@@ -617,12 +605,12 @@ int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
     }
 #endif
 
-    EVP_CIPHER_CTX_cleanup(out);
+    EVP_CIPHER_CTX_reset(out);
     memcpy(out, in, sizeof(*out));
 
     if (in->cipher_data && in->cipher->ctx_size) {
         out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
-        if (!out->cipher_data) {
+        if (out->cipher_data == NULL) {
             EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE);
             return 0;
         }