diff --git a/library/pkcs12.c b/library/pkcs12.c
index 4db2a4b..4e12476 100644
--- a/library/pkcs12.c
+++ b/library/pkcs12.c
@@ -172,6 +172,7 @@
     size_t iv_len = 0;
     size_t finish_olen = 0;
     unsigned int padlen = 0;
+    mbedtls_cipher_padding_t padding;
 
     if (pwd == NULL && pwdlen != 0) {
         return MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA;
@@ -218,7 +219,7 @@
 #if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
     /* PKCS12 uses CBC with PKCS7 padding */
 
-    mbedtls_cipher_padding_t padding = MBEDTLS_PADDING_PKCS7;
+    padding = MBEDTLS_PADDING_PKCS7;
 #if !defined(MBEDTLS_CIPHER_PADDING_PKCS7)
     /* For historical reasons, when decrypting, this function works when
      * decrypting even when support for PKCS7 padding is disabled. In this
diff --git a/library/pkcs5.c b/library/pkcs5.c
index 2756d05..3dc97a5 100644
--- a/library/pkcs5.c
+++ b/library/pkcs5.c
@@ -152,6 +152,7 @@
     mbedtls_cipher_type_t cipher_alg;
     mbedtls_cipher_context_t cipher_ctx;
     unsigned int padlen = 0;
+    mbedtls_cipher_padding_t padding;
 
     p = pbe_params->p;
     end = p + pbe_params->len;
@@ -246,7 +247,7 @@
      * "PKCS5 padding" except that it's typically only called PKCS5
      * with 64-bit-block ciphers).
      */
-    mbedtls_cipher_padding_t padding = MBEDTLS_PADDING_PKCS7;
+    padding = MBEDTLS_PADDING_PKCS7;
 #if !defined(MBEDTLS_CIPHER_PADDING_PKCS7)
     /* For historical reasons, when decrypting, this function works when
      * decrypting even when support for PKCS7 padding is disabled. In this
diff --git a/library/x509_create.c b/library/x509_create.c
index 2583cdd..3074ce4 100644
--- a/library/x509_create.c
+++ b/library/x509_create.c
@@ -254,31 +254,33 @@
     /* Step 3: decode the DER. */
     /* We've checked that der_length >= 1 above. */
     *tag = der[0];
-    unsigned char *p = der + 1;
-    if (mbedtls_asn1_get_len(&p, der + der_length, data_len) != 0) {
-        goto error;
-    }
-    /* Now p points to the first byte of the payload inside der,
-     * and *data_len is the length of the payload. */
+    {
+        unsigned char *p = der + 1;
+        if (mbedtls_asn1_get_len(&p, der + der_length, data_len) != 0) {
+            goto error;
+        }
+        /* Now p points to the first byte of the payload inside der,
+        * and *data_len is the length of the payload. */
 
-    /* Step 4: payload validation */
-    if (*data_len > MBEDTLS_X509_MAX_DN_NAME_SIZE) {
-        goto error;
-    }
-    /* Strings must not contain null bytes. */
-    if (MBEDTLS_ASN1_IS_STRING_TAG(*tag)) {
-        for (size_t i = 0; i < *data_len; i++) {
-            if (p[i] == 0) {
-                goto error;
+        /* Step 4: payload validation */
+        if (*data_len > MBEDTLS_X509_MAX_DN_NAME_SIZE) {
+            goto error;
+        }
+        /* Strings must not contain null bytes. */
+        if (MBEDTLS_ASN1_IS_STRING_TAG(*tag)) {
+            for (size_t i = 0; i < *data_len; i++) {
+                if (p[i] == 0) {
+                    goto error;
+                }
             }
         }
-    }
 
-    /* Step 5: output the payload. */
-    if (*data_len > data_size) {
-        goto error;
+        /* Step 5: output the payload. */
+        if (*data_len > data_size) {
+            goto error;
+        }
+        memcpy(data, p, *data_len);
     }
-    memcpy(data, p, *data_len);
     mbedtls_free(der);
 
     return 0;