Merge tag 'mbedtls-2.8.0' into iotssl-1381-x509-verify-refactor-restricted

Conflict resolution:

* ChangeLog
* tests/data_files/Makefile: concurrent additions, order irrelevant
* tests/data_files/test-ca.opensslconf: concurrent additions, order irrelevant
* tests/scripts/all.sh: one comment change conflicted with a code
  addition. In addition some of the additions in the
  iotssl-1381-x509-verify-refactor-restricted branch need support for
  keep-going mode, this will be added in a subsequent commit.

include/mbedtls/asn1.h

@@ -88,6 +88,21 @@
 #define MBEDTLS_ASN1_PRIMITIVE               0x00
 #define MBEDTLS_ASN1_CONSTRUCTED             0x20
 #define MBEDTLS_ASN1_CONTEXT_SPECIFIC        0x80
+
+/*
+ * Bit masks for each of the components of an ASN.1 tag as specified in
+ * ITU X.690 (08/2015), section 8.1 "General rules for encoding",
+ * paragraph 8.1.2.2:
+ *
+ * Bit  8     7   6   5          1
+ *     +-------+-----+------------+
+ *     | Class | P/C | Tag number |
+ *     +-------+-----+------------+
+ */
+#define MBEDTLS_ASN1_TAG_CLASS_MASK          0xC0
+#define MBEDTLS_ASN1_TAG_PC_MASK             0x20
+#define MBEDTLS_ASN1_TAG_VALUE_MASK          0x1F
+
 /* \} name */
 /* \} addtogroup asn1_module */
 

include/mbedtls/config.h

@@ -1049,7 +1049,8 @@
 /**
  * \def MBEDTLS_RSA_NO_CRT
  *
- * Do not use the Chinese Remainder Theorem for the RSA private operation.
+ * Do not use the Chinese Remainder Theorem
+ * for the RSA private operation.
  *
  * Uncomment this macro to disable the use of CRT in RSA.
  *
@@ -1541,6 +1542,9 @@
  *
  * \note Currently compression can't be used with DTLS.
  *
+ * \deprecated This feature is deprecated and will be removed
+ *             in the next major revision of the library.
+ *
  * Used in: library/ssl_tls.c
  *          library/ssl_cli.c
  *          library/ssl_srv.c

include/mbedtls/rsa.h

@@ -518,6 +518,18 @@ int mbedtls_rsa_public( mbedtls_rsa_context *ctx,
  *
  * \note           The input and output buffers must be large
  *                 enough. For example, 128 Bytes if RSA-1024 is used.
+ *
+ * \note           Blinding is used if and only if a PRNG is provided.
+ *
+ * \note           If blinding is used, both the base of exponentation
+ *                 and the exponent are blinded, providing protection
+ *                 against some side-channel attacks.
+ *
+ * \warning        It is deprecated and a security risk to not provide
+ *                 a PRNG here and thereby prevent the use of blinding.
+ *                 Future versions of the library may enforce the presence
+ *                 of a PRNG.
+ *
  */
 int mbedtls_rsa_private( mbedtls_rsa_context *ctx,
                  int (*f_rng)(void *, unsigned char *, size_t),

include/mbedtls/ssl.h

@@ -49,6 +49,15 @@
 #endif
 
 #if defined(MBEDTLS_ZLIB_SUPPORT)
+
+#if defined(MBEDTLS_DEPRECATED_WARNING)
+#warning "Record compression support via MBEDTLS_ZLIB_SUPPORT is deprecated and will be removed in the next major revision of the library"
+#endif
+
+#if defined(MBEDTLS_DEPRECATED_REMOVED)
+#error "Record compression support via MBEDTLS_ZLIB_SUPPORT is deprecated and cannot be used if MBEDTLS_DEPRECATED_REMOVED is set"
+#endif
+
 #include "zlib.h"
 #endif
 
@@ -971,8 +980,13 @@ void mbedtls_ssl_init( mbedtls_ssl_context *ssl );
  * \note           No copy of the configuration context is made, it can be
  *                 shared by many mbedtls_ssl_context structures.
  *
- * \warning        Modifying the conf structure after it has been used in this
- *                 function is unsupported!
+ * \warning        The conf structure will be accessed during the session.
+ *                 It must not be modified or freed as long as the session
+ *                 is active.
+ *
+ * \warning        This function must be called exactly once per context.
+ *                 Calling mbedtls_ssl_setup again is not supported, even
+ *                 if no session is active.
  *
  * \param ssl      SSL context
  * \param conf     SSL configuration to use

include/mbedtls/ssl_internal.h

@@ -71,6 +71,9 @@
 #endif /* MBEDTLS_SSL_PROTO_TLS1   */
 #endif /* MBEDTLS_SSL_PROTO_SSL3   */
 
+#define MBEDTLS_SSL_MIN_VALID_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_1
+#define MBEDTLS_SSL_MIN_VALID_MAJOR_VERSION MBEDTLS_SSL_MAJOR_VERSION_3
+
 /* Determine maximum supported version */
 #define MBEDTLS_SSL_MAX_MAJOR_VERSION           MBEDTLS_SSL_MAJOR_VERSION_3
 

include/mbedtls/version.h

@@ -39,7 +39,7 @@
  * Major, Minor, Patchlevel
  */
 #define MBEDTLS_VERSION_MAJOR  2
-#define MBEDTLS_VERSION_MINOR  7
+#define MBEDTLS_VERSION_MINOR  8
 #define MBEDTLS_VERSION_PATCH  0
 
 /**
@@ -47,9 +47,9 @@
  *    MMNNPP00
  *    Major version | Minor version | Patch version
  */
-#define MBEDTLS_VERSION_NUMBER         0x02070000
-#define MBEDTLS_VERSION_STRING         "2.7.0"
-#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 2.7.0"
+#define MBEDTLS_VERSION_NUMBER         0x02080000
+#define MBEDTLS_VERSION_STRING         "2.8.0"
+#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 2.8.0"
 
 #if defined(MBEDTLS_VERSION_C)