Squashed commit upgrading to mbedtls-2.22.0

Squash merging branch import/mbedtls-2.22.0

5cab03377186 ("mk/clang.mk: define libgcc$(sm)")
3607a5386a72 ("core: mbedtls: enable MBEDTLS_ECDH_LEGACY_CONTEXT")
896c8845bbda ("mbedtls: remove file md_wrap.c from build")
400b2af54fa0 ("libmbedtls: mbedtls_mpi_exp_mod(): optimize mempool usage")
777827c7af3d ("libmbedtls: mbedtls_mpi_exp_mod(): reduce stack usage")
549e4600678e ("libmbedtls: preserve mempool usage on reinit")
02d636083fe2 ("libmbedtls: mbedtls_mpi_exp_mod() initialize W")
d2ac2b3c92bf ("libmbedtls: fix no CRT issue")
f550879d5be2 ("libmbedtls: add interfaces in mbedtls for context memory operation")
219173d807ce ("libmedtls: mpi_miller_rabin: increase count limit")
7930b0b6b5e4 ("libmbedtls: add mbedtls_mpi_init_mempool()")
78af9fdc120f ("libmbedtls: make mbedtls_mpi_mont*() available")
8f7357271cc2 ("libmbedtls: refine mbedtls license header")
c5993878881f ("mbedtls: configure mbedtls to reach for config")
6f9c587783af ("mbedtls: remove default include/mbedtls/config.h")
3d3bd3b12752 ("Import mbedtls-2.22.0")

Signed-off-by: Jerome Forissier <jerome@forissier.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/lib/libmbedtls/mbedtls/library/x509.c b/lib/libmbedtls/mbedtls/library/x509.c
index 48a8b07..9e6ba68 100644
--- a/lib/libmbedtls/mbedtls/library/x509.c
+++ b/lib/libmbedtls/mbedtls/library/x509.c
@@ -39,6 +39,7 @@
 
 #include "mbedtls/x509.h"
 #include "mbedtls/asn1.h"
+#include "mbedtls/error.h"
 #include "mbedtls/oid.h"
 
 #include <stdio.h>
@@ -83,7 +84,7 @@
 int mbedtls_x509_get_serial( unsigned char **p, const unsigned char *end,
                      mbedtls_x509_buf *serial )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     if( ( end - *p ) < 1 )
         return( MBEDTLS_ERR_X509_INVALID_SERIAL +
@@ -114,7 +115,7 @@
 int mbedtls_x509_get_alg_null( unsigned char **p, const unsigned char *end,
                        mbedtls_x509_buf *alg )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     if( ( ret = mbedtls_asn1_get_alg_null( p, end, alg ) ) != 0 )
         return( MBEDTLS_ERR_X509_INVALID_ALG + ret );
@@ -128,7 +129,7 @@
 int mbedtls_x509_get_alg( unsigned char **p, const unsigned char *end,
                   mbedtls_x509_buf *alg, mbedtls_x509_buf *params )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     if( ( ret = mbedtls_asn1_get_alg( p, end, alg, params ) ) != 0 )
         return( MBEDTLS_ERR_X509_INVALID_ALG + ret );
@@ -148,7 +149,7 @@
  */
 static int x509_get_hash_alg( const mbedtls_x509_buf *alg, mbedtls_md_type_t *md_alg )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *p;
     const unsigned char *end;
     mbedtls_x509_buf md_oid;
@@ -209,7 +210,7 @@
                                 mbedtls_md_type_t *md_alg, mbedtls_md_type_t *mgf_md,
                                 int *salt_len )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     unsigned char *p;
     const unsigned char *end, *end2;
     size_t len;
@@ -352,7 +353,7 @@
                                      const unsigned char *end,
                                      mbedtls_x509_name *cur )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t len;
     mbedtls_x509_buf *oid;
     mbedtls_x509_buf *val;
@@ -433,7 +434,7 @@
 int mbedtls_x509_get_name( unsigned char **p, const unsigned char *end,
                    mbedtls_x509_name *cur )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t set_len;
     const unsigned char *end_set;
 
@@ -539,7 +540,7 @@
 static int x509_parse_time( unsigned char **p, size_t len, size_t yearlen,
                             mbedtls_x509_time *tm )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     /*
      * Minimum length is 10 or 12 depending on yearlen
@@ -604,7 +605,7 @@
 int mbedtls_x509_get_time( unsigned char **p, const unsigned char *end,
                            mbedtls_x509_time *tm )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t len, year_len;
     unsigned char tag;
 
@@ -633,7 +634,7 @@
 
 int mbedtls_x509_get_sig( unsigned char **p, const unsigned char *end, mbedtls_x509_buf *sig )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t len;
     int tag_type;
 
@@ -662,7 +663,7 @@
                       mbedtls_md_type_t *md_alg, mbedtls_pk_type_t *pk_alg,
                       void **sig_opts )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     if( *sig_opts != NULL )
         return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
@@ -710,7 +711,7 @@
 int mbedtls_x509_get_ext( unsigned char **p, const unsigned char *end,
                           mbedtls_x509_buf *ext, int tag )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t len;
 
     /* Extension structure use EXPLICIT tagging. That is, the actual
@@ -745,7 +746,7 @@
  */
 int mbedtls_x509_dn_gets( char *buf, size_t size, const mbedtls_x509_name *dn )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t i, n;
     unsigned char c, merge = 0;
     const mbedtls_x509_name *name;
@@ -807,7 +808,7 @@
  */
 int mbedtls_x509_serial_gets( char *buf, size_t size, const mbedtls_x509_buf *serial )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     size_t i, n, nr;
     char *p;
 
@@ -843,7 +844,7 @@
                        mbedtls_pk_type_t pk_alg, mbedtls_md_type_t md_alg,
                        const void *sig_opts )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     char *p = buf;
     size_t n = size;
     const char *desc = NULL;
@@ -888,7 +889,7 @@
 {
     char *p = buf;
     size_t n = buf_size;
-    int ret;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     ret = mbedtls_snprintf( p, n, "%s key size", name );
     MBEDTLS_X509_SAFE_SNPRINTF;
@@ -1063,7 +1064,7 @@
     mbedtls_x509_crt_free( &clicert );
 #else
     ((void) verbose);
-#endif /* MBEDTLS_CERTS_C && MBEDTLS_SHA1_C */
+#endif /* MBEDTLS_CERTS_C && MBEDTLS_SHA256_C */
     return( ret );
 }