[PATCH v19 03/33] libtasn1: disable code not needed in grub

[Gary Lin]

We don't expect to be able to write ASN.1, only read it,
so we can disable some code.

Do that with #if 0/#endif, rather than deletion. This means
that the difference between upstream and grub is smaller,
which should make updating libtasn1 easier in the future.

With these exclusions we also avoid the need for minmax.h,
which is convenient because it means we don't have to
import it from gnulib.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 ...asn1-disable-code-not-needed-in-grub.patch | 320 ++++++++++++++++++
 1 file changed, 320 insertions(+)
 create mode 100644 
grub-core/lib/libtasn1-patches/0001-libtasn1-disable-code-not-needed-in-grub.patch

diff --git 
a/grub-core/lib/libtasn1-patches/0001-libtasn1-disable-code-not-needed-in-grub.patch
 
b/grub-core/lib/libtasn1-patches/0001-libtasn1-disable-code-not-needed-in-grub.patch
new file mode 100644
index 000000000..3203a014c
--- /dev/null
+++ 
b/grub-core/lib/libtasn1-patches/0001-libtasn1-disable-code-not-needed-in-grub.patch
@@ -0,0 +1,320 @@
+From b927f1b24fe10c57edc9711ff4baa12b013ce351 Mon Sep 17 00:00:00 2001
+From: Daniel Axtens <dja@axtens.net>
+Date: Fri, 1 May 2020 17:12:23 +1000
+Subject: [PATCH 01/12] libtasn1: disable code not needed in grub
+
+We don't expect to be able to write ASN.1, only read it,
+so we can disable some code.
+
+Do that with #if 0/#endif, rather than deletion. This means
+that the difference between upstream and grub is smaller,
+which should make updating libtasn1 easier in the future.
+
+With these exclusions we also avoid the need for minmax.h,
+which is convenient because it means we don't have to
+import it from gnulib.
+
+Signed-off-by: Daniel Axtens <dja@axtens.net>
+Signed-off-by: Gary Lin <glin@suse.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+---
+ grub-core/lib/libtasn1-grub/lib/coding.c    | 12 ++++++++++--
+ grub-core/lib/libtasn1-grub/lib/decoding.c  |  2 ++
+ grub-core/lib/libtasn1-grub/lib/element.c   |  6 +++---
+ grub-core/lib/libtasn1-grub/lib/errors.c    |  3 +++
+ grub-core/lib/libtasn1-grub/lib/structure.c | 10 ++++++----
+ grub-core/lib/libtasn1-grub/libtasn1.h      | 15 +++++++++++++++
+ 6 files changed, 39 insertions(+), 9 deletions(-)
+
+diff --git a/grub-core/lib/libtasn1-grub/lib/coding.c 
b/grub-core/lib/libtasn1-grub/lib/coding.c
+index ea5bc370e..5d03bca9d 100644
+--- a/grub-core/lib/libtasn1-grub/lib/coding.c
++++ b/grub-core/lib/libtasn1-grub/lib/coding.c
+@@ -30,11 +30,11 @@
+ #include "parser_aux.h"
+ #include <gstr.h>
+ #include "element.h"
+-#include "minmax.h"
+ #include <structure.h>
+ 
+ #define MAX_TAG_LEN 16
+ 
++#if 0 /* GRUB SKIPPED IMPORTING */
+ /******************************************************/
+ /* Function : _asn1_error_description_value_not_found */
+ /* Description: creates the ErrorDescription string   */
+@@ -58,6 +58,7 @@ _asn1_error_description_value_not_found (asn1_node node,
+   Estrcat (ErrorDescription, "' not found");
+ 
+ }
++#endif
+ 
+ /**
+  * asn1_length_der:
+@@ -244,6 +245,7 @@ asn1_encode_simple_der (unsigned int etype, const unsigned 
char *str,
+   return ASN1_SUCCESS;
+ }
+ 
++#if 0 /* GRUB SKIPPED IMPORTING */
+ /******************************************************/
+ /* Function : _asn1_time_der                          */
+ /* Description: creates the DER coding for a TIME     */
+@@ -278,7 +280,7 @@ _asn1_time_der (unsigned char *str, int str_len, unsigned 
char *der,
+ 
+   return ASN1_SUCCESS;
+ }
+-
++#endif
+ 
+ /*
+ void
+@@ -519,6 +521,7 @@ asn1_bit_der (const unsigned char *str, int bit_len,
+ }
+ 
+ 
++#if 0 /* GRUB SKIPPED IMPORTING */
+ /******************************************************/
+ /* Function : _asn1_complete_explicit_tag             */
+ /* Description: add the length coding to the EXPLICIT */
+@@ -595,6 +598,7 @@ _asn1_complete_explicit_tag (asn1_node node, unsigned char 
*der,
+ 
+   return ASN1_SUCCESS;
+ }
++#endif
+ 
+ const tag_and_class_st _asn1_tags[] = {
+   [ASN1_ETYPE_GENERALSTRING] =
+@@ -647,6 +651,8 @@ const tag_and_class_st _asn1_tags[] = {
+ 
+ unsigned int _asn1_tags_size = sizeof (_asn1_tags) / sizeof (_asn1_tags[0]);
+ 
++
++#if 0 /* GRUB SKIPPED IMPORTING */
+ /******************************************************/
+ /* Function : _asn1_insert_tag_der                    */
+ /* Description: creates the DER coding of tags of one */
+@@ -1423,3 +1429,5 @@ error:
+   asn1_delete_structure (&node);
+   return err;
+ }
++
++#endif
+diff --git a/grub-core/lib/libtasn1-grub/lib/decoding.c 
b/grub-core/lib/libtasn1-grub/lib/decoding.c
+index b9245c486..bf9cb13ac 100644
+--- a/grub-core/lib/libtasn1-grub/lib/decoding.c
++++ b/grub-core/lib/libtasn1-grub/lib/decoding.c
+@@ -1620,6 +1620,7 @@ asn1_der_decoding (asn1_node * element, const void 
*ider, int ider_len,
+   return asn1_der_decoding2 (element, ider, &ider_len, 0, errorDescription);
+ }
+ 
++#if 0 /* GRUB SKIPPED IMPORTING */
+ /**
+  * asn1_der_decoding_element:
+  * @structure: pointer to an ASN1 structure
+@@ -1650,6 +1651,7 @@ asn1_der_decoding_element (asn1_node * structure, const 
char *elementName,
+ {
+   return asn1_der_decoding (structure, ider, len, errorDescription);
+ }
++#endif
+ 
+ /**
+  * asn1_der_decoding_startEnd:
+diff --git a/grub-core/lib/libtasn1-grub/lib/element.c 
b/grub-core/lib/libtasn1-grub/lib/element.c
+index d4c558e10..bc4c3c8d7 100644
+--- a/grub-core/lib/libtasn1-grub/lib/element.c
++++ b/grub-core/lib/libtasn1-grub/lib/element.c
+@@ -118,7 +118,7 @@ _asn1_convert_integer (const unsigned char *value, 
unsigned char *value_out,
+       value_out[k2 - k] = val[k2];
+     }
+ 
+-#if 0
++#if 0 /* GRUB SKIPPED IMPORTING */
+   printf ("_asn1_convert_integer: valueIn=%s, lenOut=%d", value, *len);
+   for (k = 0; k < SIZEOF_UNSIGNED_LONG_INT; k++)
+     printf (", vOut[%d]=%d", k, value_out[k]);
+@@ -191,7 +191,7 @@ _asn1_append_sequence_set (asn1_node node, struct 
node_tail_cache_st *pcache)
+   return ASN1_SUCCESS;
+ }
+ 
+-
++#if 0
+ /**
+  * asn1_write_value:
+  * @node_root: pointer to a structure
+@@ -646,7 +646,7 @@ asn1_write_value (asn1_node node_root, const char *name,
+ 
+   return ASN1_SUCCESS;
+ }
+-
++#endif
+ 
+ #define PUT_VALUE( ptr, ptr_size, data, data_size) \
+       *len = data_size; \
+diff --git a/grub-core/lib/libtasn1-grub/lib/errors.c 
b/grub-core/lib/libtasn1-grub/lib/errors.c
+index aef5dfe6f..2b2322152 100644
+--- a/grub-core/lib/libtasn1-grub/lib/errors.c
++++ b/grub-core/lib/libtasn1-grub/lib/errors.c
+@@ -57,6 +57,8 @@ static const libtasn1_error_entry error_algorithms[] = {
+   {0, 0}
+ };
+ 
++
++#if 0 /* GRUB SKIPPED IMPORTING */
+ /**
+  * asn1_perror:
+  * @error: is an error returned by a libtasn1 function.
+@@ -73,6 +75,7 @@ asn1_perror (int error)
+   const char *str = asn1_strerror (error);
+   fprintf (stderr, "LIBTASN1 ERROR: %s\n", str ? str : "(null)");
+ }
++#endif
+ 
+ /**
+  * asn1_strerror:
+diff --git a/grub-core/lib/libtasn1-grub/lib/structure.c 
b/grub-core/lib/libtasn1-grub/lib/structure.c
+index 512dd601f..f5a947d57 100644
+--- a/grub-core/lib/libtasn1-grub/lib/structure.c
++++ b/grub-core/lib/libtasn1-grub/lib/structure.c
+@@ -76,7 +76,7 @@ _asn1_find_left (asn1_node_const node)
+   return node->left;
+ }
+ 
+-
++#if 0 /* GRUB SKIPPED IMPORTING */
+ int
+ _asn1_create_static_structure (asn1_node_const pointer,
+                              char *output_file_name, char *vector_name)
+@@ -155,7 +155,7 @@ _asn1_create_static_structure (asn1_node_const pointer,
+ 
+   return ASN1_SUCCESS;
+ }
+-
++#endif
+ 
+ /**
+  * asn1_array2tree:
+@@ -721,7 +721,7 @@ asn1_create_element (asn1_node_const definitions, const 
char *source_name,
+   return res;
+ }
+ 
+-
++#if 0 /* GRUB SKIPPED IMPORTING */
+ /**
+  * asn1_print_structure:
+  * @out: pointer to the output file (e.g. stdout).
+@@ -1062,7 +1062,7 @@ asn1_print_structure (FILE * out, asn1_node_const 
structure, const char *name,
+       }
+     }
+ }
+-
++#endif
+ 
+ 
+ /**
+@@ -1158,6 +1158,7 @@ asn1_find_structure_from_oid (asn1_node_const 
definitions,
+   return NULL;                        /* ASN1_ELEMENT_NOT_FOUND; */
+ }
+ 
++#if 0 /* GRUB SKIPPED IMPORTING */
+ /**
+  * asn1_copy_node:
+  * @dst: Destination asn1 node.
+@@ -1207,6 +1208,7 @@ asn1_copy_node (asn1_node dst, const char *dst_name,
+ 
+   return result;
+ }
++#endif
+ 
+ /**
+  * asn1_dup_node:
+diff --git a/grub-core/lib/libtasn1-grub/libtasn1.h 
b/grub-core/lib/libtasn1-grub/libtasn1.h
+index 51cc7879f..058ab27b0 100644
+--- a/grub-core/lib/libtasn1-grub/libtasn1.h
++++ b/grub-core/lib/libtasn1-grub/libtasn1.h
+@@ -318,6 +318,8 @@ extern "C"
+ /*  Functions definitions          */
+ /***********************************/
+ 
++/* These functions are not used in grub and should not be referenced. */
++# if 0 /* GRUB SKIPPED IMPORTING */
+   extern ASN1_API int
+     asn1_parser2tree (const char *file,
+                     asn1_node * definitions, char *error_desc);
+@@ -326,14 +328,17 @@ extern "C"
+     asn1_parser2array (const char *inputFileName,
+                      const char *outputFileName,
+                      const char *vectorName, char *error_desc);
++# endif
+ 
+   extern ASN1_API int
+     asn1_array2tree (const asn1_static_node * array,
+                    asn1_node * definitions, char *errorDescription);
+ 
++# if 0 /* GRUB SKIPPED IMPORTING */
+   extern ASN1_API void
+     asn1_print_structure (FILE * out, asn1_node_const structure,
+                         const char *name, int mode);
++# endif
+ 
+   extern ASN1_API int
+     asn1_create_element (asn1_node_const definitions,
+@@ -347,9 +352,11 @@ extern "C"
+   extern ASN1_API int
+     asn1_delete_element (asn1_node structure, const char *element_name);
+ 
++# if 0 /* GRUB SKIPPED IMPORTING */
+   extern ASN1_API int
+     asn1_write_value (asn1_node node_root, const char *name,
+                     const void *ivalue, int len);
++# endif
+ 
+   extern ASN1_API int
+     asn1_read_value (asn1_node_const root, const char *name,
+@@ -366,9 +373,11 @@ extern "C"
+     asn1_number_of_elements (asn1_node_const element, const char *name,
+                            int *num);
+ 
++# if 0 /* GRUB SKIPPED IMPORTING */
+   extern ASN1_API int
+     asn1_der_coding (asn1_node_const element, const char *name,
+                    void *ider, int *len, char *ErrorDescription);
++# endif
+ 
+   extern ASN1_API int
+     asn1_der_decoding2 (asn1_node * element, const void *ider,
+@@ -379,6 +388,7 @@ extern "C"
+     asn1_der_decoding (asn1_node * element, const void *ider,
+                      int ider_len, char *errorDescription);
+ 
++# if 0 /* GRUB SKIPPED IMPORTING */
+ /* Do not use. Use asn1_der_decoding() instead. */
+   extern ASN1_API int
+     asn1_der_decoding_element (asn1_node * structure,
+@@ -386,6 +396,7 @@ extern "C"
+                              const void *ider, int len,
+                              char *errorDescription)
+     _ASN1_GCC_ATTR_DEPRECATED;
++# endif
+ 
+   extern ASN1_API int
+     asn1_der_decoding_startEnd (asn1_node element,
+@@ -411,12 +422,16 @@ extern "C"
+                                                           const char
+                                                           *oidValue);
+ 
++# if 0 /* GRUB SKIPPED IMPORTING */
+     __LIBTASN1_PURE__
+     extern ASN1_API const char *asn1_check_version (const char *req_version);
++# endif
+ 
+   __LIBTASN1_PURE__ extern ASN1_API const char *asn1_strerror (int error);
+ 
++# if 0 /* GRUB SKIPPED IMPORTING */
+   extern ASN1_API void asn1_perror (int error);
++# endif
+ 
+ # define ASN1_MAX_TAG_SIZE 4
+ # define ASN1_MAX_LENGTH_SIZE 9
+-- 
+2.35.3
+
-- 
2.35.3