Fix bug #74651 - check EVP_SealInit as it can return -1

Author: smalyshev

ext/openssl/openssl.c

@@ -4982,15 +4982,15 @@ PHP_FUNCTION(openssl_seal)
 	buf = emalloc(data_len + EVP_CIPHER_CTX_block_size(&ctx));
 	EVP_CIPHER_CTX_cleanup(&ctx);
 
-	if (!EVP_SealInit(&ctx, cipher, eks, eksl, NULL, pkeys, nkeys) || !EVP_SealUpdate(&ctx, buf, &len1, (unsigned char *)data, data_len)) {
+	if (EVP_SealInit(&ctx, cipher, eks, eksl, NULL, pkeys, nkeys) <= 0 ||
+			!EVP_SealUpdate(&ctx, buf, &len1, (unsigned char *)data, data_len) ||
+			!EVP_SealFinal(&ctx, buf + len1, &len2)) {
 		RETVAL_FALSE;
 		efree(buf);
 		EVP_CIPHER_CTX_cleanup(&ctx);
 		goto clean_exit;
 	}
 
-	EVP_SealFinal(&ctx, buf + len1, &len2);
-
 	if (len1 + len2 > 0) {
 		zval_dtor(sealdata);
 		buf[len1 + len2] = '\0';

ext/openssl/tests/74651.pem

@@ -0,0 +1,27 @@
+-----BEGIN CERTIFICATE-----
+MIIEoDCCBAmgAwIBAgIBJzANBgkqhkiG9w0BAQQFADCBkDELMAkGA1UEFhMCUk8x
+EDAOBgNVBAgTB1JvbWFuaWExEDAOBgNVBAcTB0NyYWlvdmExDzANBgNVBAoTBlNl
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+A4GBAIBIOJ+iiLyQfNJEY+IMefayQea0nmuXYY+F+L1DFjSC7xChytgYoPNnKkhh
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+Fl63S7uCOhnVJt+4MnUK1N6/pwgsp+Z2GvEsDG1qCKnvNpf6
+-----END CERTIFICATE-----

ext/openssl/tests/bug74651.phpt

@@ -0,0 +1,17 @@
+--TEST--
+Bug #74651: negative-size-param (-1) in memcpy in zif_openssl_seal()
+--SKIPIF--
+<?php
+if (!extension_loaded("openssl")) die("skip openssl not loaded");
+?>
+--FILE--
+<?php
+
+$inputstr = file_get_contents(__DIR__ . "/74651.pem");
+$pub_key_id = openssl_get_publickey($inputstr);
+var_dump($pub_key_id);
+var_dump(openssl_seal($inputstr, $sealed, $ekeys, array($pub_key_id, $pub_key_id), 'AES-128-ECB'));
+?>
+--EXPECTF--
+resource(%d) of type (OpenSSL key)
+bool(false)