Tidy up ssl3_digest_cached_records logic.

[openssl.git] / ssl / s3_enc.c

diff --git a/ssl/s3_enc.c b/ssl/s3_enc.c
index df86f5b9f38e8e408bb830e2c6c6a68ea29d8f44..5e52af827b9483add3859b3c5deee685450c9729 100644 (file)
--- a/ssl/s3_enc.c
+++ b/ssl/s3_enc.c
@@ -206,7 +206,7 @@ static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
 
         km += MD5_DIGEST_LENGTH;
     }
-    OPENSSL_cleanse(smd, SHA_DIGEST_LENGTH);
+    OPENSSL_cleanse(smd, sizeof(smd));
     EVP_MD_CTX_cleanup(&m5);
     EVP_MD_CTX_cleanup(&s1);
     return 1;
@@ -244,7 +244,7 @@ int ssl3_change_cipher_state(SSL *s, int which)
         if (s->enc_read_ctx != NULL)
             reuse_dd = 1;
         else if ((s->enc_read_ctx =
-                  OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
+                  OPENSSL_malloc(sizeof(*s->enc_read_ctx))) == NULL)
             goto err;
         else
             /*
@@ -259,10 +259,8 @@ int ssl3_change_cipher_state(SSL *s, int which)
         }
 #ifndef OPENSSL_NO_COMP
         /* COMPRESS */
-        if (s->expand != NULL) {
-            COMP_CTX_free(s->expand);
-            s->expand = NULL;
-        }
+        COMP_CTX_free(s->expand);
+        s->expand = NULL;
         if (comp != NULL) {
             s->expand = COMP_CTX_new(comp);
             if (s->expand == NULL) {
@@ -280,7 +278,7 @@ int ssl3_change_cipher_state(SSL *s, int which)
         if (s->enc_write_ctx != NULL)
             reuse_dd = 1;
         else if ((s->enc_write_ctx =
-                  OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
+                  OPENSSL_malloc(sizeof(*s->enc_write_ctx))) == NULL)
             goto err;
         else
             /*
@@ -294,10 +292,8 @@ int ssl3_change_cipher_state(SSL *s, int which)
         }
 #ifndef OPENSSL_NO_COMP
         /* COMPRESS */
-        if (s->compress != NULL) {
-            COMP_CTX_free(s->compress);
-            s->compress = NULL;
-        }
+        COMP_CTX_free(s->compress);
+        s->compress = NULL;
         if (comp != NULL) {
             s->compress = COMP_CTX_new(comp);
             if (s->compress == NULL) {
@@ -392,13 +388,15 @@ int ssl3_change_cipher_state(SSL *s, int which)
     }
 #endif
 
-    OPENSSL_cleanse(&(exp_key[0]), sizeof(exp_key));
-    OPENSSL_cleanse(&(exp_iv[0]), sizeof(exp_iv));
+    OPENSSL_cleanse(exp_key, sizeof(exp_key));
+    OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
     EVP_MD_CTX_cleanup(&md);
     return (1);
  err:
     SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
  err2:
+    OPENSSL_cleanse(exp_key, sizeof(exp_key));
+    OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
     return (0);
 }
 
@@ -479,8 +477,7 @@ void ssl3_cleanup_key_block(SSL *s)
 void ssl3_init_finished_mac(SSL *s)
 {
     BIO_free(s->s3->handshake_buffer);
-    if (s->s3->handshake_dgst)
-        ssl3_free_digest_list(s);
+    ssl3_free_digest_list(s);
     s->s3->handshake_buffer = BIO_new(BIO_s_mem());
     (void)BIO_set_close(s->s3->handshake_buffer, BIO_CLOSE);
 }
@@ -500,8 +497,7 @@ void ssl3_free_digest_list(SSL *s)
 
 void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
 {
-    if (s->s3->handshake_buffer
-        && !(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE)) {
+    if (s->s3->handshake_dgst == NULL) {
         BIO_write(s->s3->handshake_buffer, (void *)buf, len);
     } else {
         int i;
@@ -512,7 +508,7 @@ void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
     }
 }
 
-int ssl3_digest_cached_records(SSL *s)
+int ssl3_digest_cached_records(SSL *s, int keep)
 {
     int i;
     long mask;
@@ -520,37 +516,37 @@ int ssl3_digest_cached_records(SSL *s)
     long hdatalen;
     void *hdata;
 
-    /* Allocate handshake_dgst array */
-    ssl3_free_digest_list(s);
-    s->s3->handshake_dgst =
-        OPENSSL_malloc(SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *));
     if (s->s3->handshake_dgst == NULL) {
-        SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_MALLOC_FAILURE);
-        return 0;
-    }
-    memset(s->s3->handshake_dgst, 0, SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *));
-    hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
-    if (hdatalen <= 0) {
-        SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH);
-        return 0;
-    }
+        /* Allocate handshake_dgst array */
+        s->s3->handshake_dgst =
+            OPENSSL_malloc(sizeof(*s->s3->handshake_dgst) * SSL_MAX_DIGEST);
+        if (s->s3->handshake_dgst == NULL) {
+            SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_MALLOC_FAILURE);
+            return 0;
+        }
+        hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
+        if (hdatalen <= 0) {
+            SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH);
+            return 0;
+        }
 
-    /* Loop through bitso of algorithm2 field and create MD_CTX-es */
-    for (i = 0; ssl_get_handshake_digest(i, &mask, &md); i++) {
-        if ((mask & ssl_get_algorithm2(s)) && md) {
-            s->s3->handshake_dgst[i] = EVP_MD_CTX_create();
-            if (EVP_MD_nid(md) == NID_md5) {
-                EVP_MD_CTX_set_flags(s->s3->handshake_dgst[i],
-                                     EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
+        /* Loop through bits of algorithm2 field and create MD_CTX-es */
+        for (i = 0; ssl_get_handshake_digest(i, &mask, &md); i++) {
+            if ((mask & ssl_get_algorithm2(s)) && md) {
+                s->s3->handshake_dgst[i] = EVP_MD_CTX_create();
+                if (EVP_MD_nid(md) == NID_md5) {
+                    EVP_MD_CTX_set_flags(s->s3->handshake_dgst[i],
+                                         EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
+                }
+                EVP_DigestInit_ex(s->s3->handshake_dgst[i], md, NULL);
+                EVP_DigestUpdate(s->s3->handshake_dgst[i], hdata, hdatalen);
+            } else {
+                s->s3->handshake_dgst[i] = NULL;
             }
-            EVP_DigestInit_ex(s->s3->handshake_dgst[i], md, NULL);
-            EVP_DigestUpdate(s->s3->handshake_dgst[i], hdata, hdatalen);
-        } else {
-            s->s3->handshake_dgst[i] = NULL;
         }
+
     }
-    if (!(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE)) {
-        /* Free handshake_buffer BIO */
+    if (keep == 0) {
         BIO_free(s->s3->handshake_buffer);
         s->s3->handshake_buffer = NULL;
     }
@@ -590,9 +586,8 @@ static int ssl3_handshake_mac(SSL *s, int md_nid,
     unsigned char md_buf[EVP_MAX_MD_SIZE];
     EVP_MD_CTX ctx, *d = NULL;
 
-    if (s->s3->handshake_buffer)
-        if (!ssl3_digest_cached_records(s))
-            return 0;
+    if (!ssl3_digest_cached_records(s, 0))
+        return 0;
 
     /*
      * Search for digest of specified type in the handshake_dgst array
@@ -690,7 +685,7 @@ int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
                         s, s->msg_callback_arg);
     }
 #endif
-    OPENSSL_cleanse(buf, sizeof buf);
+    OPENSSL_cleanse(buf, sizeof(buf));
     return (ret);
 }