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-rw-r--r--scripts/.gitignore1
-rw-r--r--scripts/Makefile2
-rw-r--r--scripts/Makefile.build11
-rw-r--r--scripts/Makefile.modpost77
-rw-r--r--scripts/asn1_compiler.c1545
-rw-r--r--scripts/sign-file115
-rwxr-xr-xscripts/x509keyid268
7 files changed, 2018 insertions, 1 deletions
diff --git a/scripts/.gitignore b/scripts/.gitignore
index 65f362d931b..fb070fa1038 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -10,3 +10,4 @@ ihex2fw
recordmcount
docproc
sortextable
+asn1_compiler
diff --git a/scripts/Makefile b/scripts/Makefile
index a55b0067758..01e7adb838d 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -16,8 +16,10 @@ hostprogs-$(CONFIG_VT) += conmakehash
hostprogs-$(CONFIG_IKCONFIG) += bin2c
hostprogs-$(BUILD_C_RECORDMCOUNT) += recordmcount
hostprogs-$(CONFIG_BUILDTIME_EXTABLE_SORT) += sortextable
+hostprogs-$(CONFIG_ASN1) += asn1_compiler
HOSTCFLAGS_sortextable.o = -I$(srctree)/tools/include
+HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include
always := $(hostprogs-y) $(hostprogs-m)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index ff1720d28d0..0e801c3cdaf 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -354,6 +354,17 @@ quiet_cmd_cpp_lds_S = LDS $@
$(obj)/%.lds: $(src)/%.lds.S FORCE
$(call if_changed_dep,cpp_lds_S)
+# ASN.1 grammar
+# ---------------------------------------------------------------------------
+quiet_cmd_asn1_compiler = ASN.1 $@
+ cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
+ $(subst .h,.c,$@) $(subst .c,.h,$@)
+
+.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h
+
+$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
+ $(call cmd,asn1_compiler)
+
# Build the compiled-in targets
# ---------------------------------------------------------------------------
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index a1cb0222ebe..002089141df 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -14,7 +14,8 @@
# 3) create one <module>.mod.c file pr. module
# 4) create one Module.symvers file with CRC for all exported symbols
# 5) compile all <module>.mod.c files
-# 6) final link of the module to a <module.ko> file
+# 6) final link of the module to a <module.ko> (or <module.unsigned>) file
+# 7) signs the modules to a <module.ko> file
# Step 3 is used to place certain information in the module's ELF
# section, including information such as:
@@ -32,6 +33,8 @@
# Step 4 is solely used to allow module versioning in external modules,
# where the CRC of each module is retrieved from the Module.symvers file.
+# Step 7 is dependent on CONFIG_MODULE_SIG being enabled.
+
# KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined
# symbols in the final module linking stage
# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
@@ -116,6 +119,7 @@ $(modules:.ko=.mod.o): %.mod.o: %.mod.c FORCE
targets += $(modules:.ko=.mod.o)
# Step 6), final link of the modules
+ifneq ($(CONFIG_MODULE_SIG),y)
quiet_cmd_ld_ko_o = LD [M] $@
cmd_ld_ko_o = $(LD) -r $(LDFLAGS) \
$(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \
@@ -125,7 +129,78 @@ $(modules): %.ko :%.o %.mod.o FORCE
$(call if_changed,ld_ko_o)
targets += $(modules)
+else
+quiet_cmd_ld_ko_unsigned_o = LD [M] $@
+ cmd_ld_ko_unsigned_o = \
+ $(LD) -r $(LDFLAGS) \
+ $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \
+ -o $@ $(filter-out FORCE,$^) \
+ $(if $(AFTER_LINK),; $(AFTER_LINK))
+
+$(modules:.ko=.ko.unsigned): %.ko.unsigned :%.o %.mod.o FORCE
+ $(call if_changed,ld_ko_unsigned_o)
+
+targets += $(modules:.ko=.ko.unsigned)
+
+# Step 7), sign the modules
+MODSECKEY = ./signing_key.priv
+MODPUBKEY = ./signing_key.x509
+
+ifeq ($(wildcard $(MODSECKEY))+$(wildcard $(MODPUBKEY)),$(MODSECKEY)+$(MODPUBKEY))
+ifeq ($(KBUILD_SRC),)
+ # no O= is being used
+ SCRIPTS_DIR := scripts
+else
+ SCRIPTS_DIR := $(KBUILD_SRC)/scripts
+endif
+SIGN_MODULES := 1
+else
+SIGN_MODULES := 0
+endif
+
+# only sign if it's an in-tree module
+ifneq ($(KBUILD_EXTMOD),)
+SIGN_MODULES := 0
+endif
+# We strip the module as best we can - note that using both strip and eu-strip
+# results in a smaller module than using either alone.
+EU_STRIP = $(shell which eu-strip || echo true)
+
+quiet_cmd_sign_ko_stripped_ko_unsigned = STRIP [M] $@
+ cmd_sign_ko_stripped_ko_unsigned = \
+ cp $< $@ && \
+ strip -x -g $@ && \
+ $(EU_STRIP) $@
+
+ifeq ($(SIGN_MODULES),1)
+
+quiet_cmd_genkeyid = GENKEYID $@
+ cmd_genkeyid = \
+ perl $(SCRIPTS_DIR)/x509keyid $< $<.signer $<.keyid
+
+%.signer %.keyid: %
+ $(call if_changed,genkeyid)
+
+KEYRING_DEP := $(MODSECKEY) $(MODPUBKEY) $(MODPUBKEY).signer $(MODPUBKEY).keyid
+quiet_cmd_sign_ko_ko_stripped = SIGN [M] $@
+ cmd_sign_ko_ko_stripped = \
+ sh $(SCRIPTS_DIR)/sign-file $(MODSECKEY) $(MODPUBKEY) $< $@
+else
+KEYRING_DEP :=
+quiet_cmd_sign_ko_ko_unsigned = NO SIGN [M] $@
+ cmd_sign_ko_ko_unsigned = \
+ cp $< $@
+endif
+
+$(modules): %.ko :%.ko.stripped $(KEYRING_DEP) FORCE
+ $(call if_changed,sign_ko_ko_stripped)
+
+$(patsubst %.ko,%.ko.stripped,$(modules)): %.ko.stripped :%.ko.unsigned FORCE
+ $(call if_changed,sign_ko_stripped_ko_unsigned)
+
+targets += $(modules)
+endif
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
diff --git a/scripts/asn1_compiler.c b/scripts/asn1_compiler.c
new file mode 100644
index 00000000000..db0e5cd34c7
--- /dev/null
+++ b/scripts/asn1_compiler.c
@@ -0,0 +1,1545 @@
+/* Simplified ASN.1 notation parser
+ *
+ * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <linux/asn1_ber_bytecode.h>
+
+enum token_type {
+ DIRECTIVE_ABSENT,
+ DIRECTIVE_ALL,
+ DIRECTIVE_ANY,
+ DIRECTIVE_APPLICATION,
+ DIRECTIVE_AUTOMATIC,
+ DIRECTIVE_BEGIN,
+ DIRECTIVE_BIT,
+ DIRECTIVE_BMPString,
+ DIRECTIVE_BOOLEAN,
+ DIRECTIVE_BY,
+ DIRECTIVE_CHARACTER,
+ DIRECTIVE_CHOICE,
+ DIRECTIVE_CLASS,
+ DIRECTIVE_COMPONENT,
+ DIRECTIVE_COMPONENTS,
+ DIRECTIVE_CONSTRAINED,
+ DIRECTIVE_CONTAINING,
+ DIRECTIVE_DEFAULT,
+ DIRECTIVE_DEFINED,
+ DIRECTIVE_DEFINITIONS,
+ DIRECTIVE_EMBEDDED,
+ DIRECTIVE_ENCODED,
+ DIRECTIVE_ENCODING_CONTROL,
+ DIRECTIVE_END,
+ DIRECTIVE_ENUMERATED,
+ DIRECTIVE_EXCEPT,
+ DIRECTIVE_EXPLICIT,
+ DIRECTIVE_EXPORTS,
+ DIRECTIVE_EXTENSIBILITY,
+ DIRECTIVE_EXTERNAL,
+ DIRECTIVE_FALSE,
+ DIRECTIVE_FROM,
+ DIRECTIVE_GeneralString,
+ DIRECTIVE_GeneralizedTime,
+ DIRECTIVE_GraphicString,
+ DIRECTIVE_IA5String,
+ DIRECTIVE_IDENTIFIER,
+ DIRECTIVE_IMPLICIT,
+ DIRECTIVE_IMPLIED,
+ DIRECTIVE_IMPORTS,
+ DIRECTIVE_INCLUDES,
+ DIRECTIVE_INSTANCE,
+ DIRECTIVE_INSTRUCTIONS,
+ DIRECTIVE_INTEGER,
+ DIRECTIVE_INTERSECTION,
+ DIRECTIVE_ISO646String,
+ DIRECTIVE_MAX,
+ DIRECTIVE_MIN,
+ DIRECTIVE_MINUS_INFINITY,
+ DIRECTIVE_NULL,
+ DIRECTIVE_NumericString,
+ DIRECTIVE_OBJECT,
+ DIRECTIVE_OCTET,
+ DIRECTIVE_OF,
+ DIRECTIVE_OPTIONAL,
+ DIRECTIVE_ObjectDescriptor,
+ DIRECTIVE_PATTERN,
+ DIRECTIVE_PDV,
+ DIRECTIVE_PLUS_INFINITY,
+ DIRECTIVE_PRESENT,
+ DIRECTIVE_PRIVATE,
+ DIRECTIVE_PrintableString,
+ DIRECTIVE_REAL,
+ DIRECTIVE_RELATIVE_OID,
+ DIRECTIVE_SEQUENCE,
+ DIRECTIVE_SET,
+ DIRECTIVE_SIZE,
+ DIRECTIVE_STRING,
+ DIRECTIVE_SYNTAX,
+ DIRECTIVE_T61String,
+ DIRECTIVE_TAGS,
+ DIRECTIVE_TRUE,
+ DIRECTIVE_TeletexString,
+ DIRECTIVE_UNION,
+ DIRECTIVE_UNIQUE,
+ DIRECTIVE_UNIVERSAL,
+ DIRECTIVE_UTCTime,
+ DIRECTIVE_UTF8String,
+ DIRECTIVE_UniversalString,
+ DIRECTIVE_VideotexString,
+ DIRECTIVE_VisibleString,
+ DIRECTIVE_WITH,
+ NR__DIRECTIVES,
+ TOKEN_ASSIGNMENT = NR__DIRECTIVES,
+ TOKEN_OPEN_CURLY,
+ TOKEN_CLOSE_CURLY,
+ TOKEN_OPEN_SQUARE,
+ TOKEN_CLOSE_SQUARE,
+ TOKEN_OPEN_ACTION,
+ TOKEN_CLOSE_ACTION,
+ TOKEN_COMMA,
+ TOKEN_NUMBER,
+ TOKEN_TYPE_NAME,
+ TOKEN_ELEMENT_NAME,
+ NR__TOKENS
+};
+
+static const unsigned char token_to_tag[NR__TOKENS] = {
+ /* EOC goes first */
+ [DIRECTIVE_BOOLEAN] = ASN1_BOOL,
+ [DIRECTIVE_INTEGER] = ASN1_INT,
+ [DIRECTIVE_BIT] = ASN1_BTS,
+ [DIRECTIVE_OCTET] = ASN1_OTS,
+ [DIRECTIVE_NULL] = ASN1_NULL,
+ [DIRECTIVE_OBJECT] = ASN1_OID,
+ [DIRECTIVE_ObjectDescriptor] = ASN1_ODE,
+ [DIRECTIVE_EXTERNAL] = ASN1_EXT,
+ [DIRECTIVE_REAL] = ASN1_REAL,
+ [DIRECTIVE_ENUMERATED] = ASN1_ENUM,
+ [DIRECTIVE_EMBEDDED] = 0,
+ [DIRECTIVE_UTF8String] = ASN1_UTF8STR,
+ [DIRECTIVE_RELATIVE_OID] = ASN1_RELOID,
+ /* 14 */
+ /* 15 */
+ [DIRECTIVE_SEQUENCE] = ASN1_SEQ,
+ [DIRECTIVE_SET] = ASN1_SET,
+ [DIRECTIVE_NumericString] = ASN1_NUMSTR,
+ [DIRECTIVE_PrintableString] = ASN1_PRNSTR,
+ [DIRECTIVE_T61String] = ASN1_TEXSTR,
+ [DIRECTIVE_TeletexString] = ASN1_TEXSTR,
+ [DIRECTIVE_VideotexString] = ASN1_VIDSTR,
+ [DIRECTIVE_IA5String] = ASN1_IA5STR,
+ [DIRECTIVE_UTCTime] = ASN1_UNITIM,
+ [DIRECTIVE_GeneralizedTime] = ASN1_GENTIM,
+ [DIRECTIVE_GraphicString] = ASN1_GRASTR,
+ [DIRECTIVE_VisibleString] = ASN1_VISSTR,
+ [DIRECTIVE_GeneralString] = ASN1_GENSTR,
+ [DIRECTIVE_UniversalString] = ASN1_UNITIM,
+ [DIRECTIVE_CHARACTER] = ASN1_CHRSTR,
+ [DIRECTIVE_BMPString] = ASN1_BMPSTR,
+};
+
+static const char asn1_classes[4][5] = {
+ [ASN1_UNIV] = "UNIV",
+ [ASN1_APPL] = "APPL",
+ [ASN1_CONT] = "CONT",
+ [ASN1_PRIV] = "PRIV"
+};
+
+static const char asn1_methods[2][5] = {
+ [ASN1_UNIV] = "PRIM",
+ [ASN1_APPL] = "CONS"
+};
+
+static const char *const asn1_universal_tags[32] = {
+ "EOC",
+ "BOOL",
+ "INT",
+ "BTS",
+ "OTS",
+ "NULL",
+ "OID",
+ "ODE",
+ "EXT",
+ "REAL",
+ "ENUM",
+ "EPDV",
+ "UTF8STR",
+ "RELOID",
+ NULL, /* 14 */
+ NULL, /* 15 */
+ "SEQ",
+ "SET",
+ "NUMSTR",
+ "PRNSTR",
+ "TEXSTR",
+ "VIDSTR",
+ "IA5STR",
+ "UNITIM",
+ "GENTIM",
+ "GRASTR",
+ "VISSTR",
+ "GENSTR",
+ "UNISTR",
+ "CHRSTR",
+ "BMPSTR",
+ NULL /* 31 */
+};
+
+static const char *filename;
+static const char *grammar_name;
+static const char *outputname;
+static const char *headername;
+
+static const char *const directives[NR__DIRECTIVES] = {
+#define _(X) [DIRECTIVE_##X] = #X
+ _(ABSENT),
+ _(ALL),
+ _(ANY),
+ _(APPLICATION),
+ _(AUTOMATIC),
+ _(BEGIN),
+ _(BIT),
+ _(BMPString),
+ _(BOOLEAN),
+ _(BY),
+ _(CHARACTER),
+ _(CHOICE),
+ _(CLASS),
+ _(COMPONENT),
+ _(COMPONENTS),
+ _(CONSTRAINED),
+ _(CONTAINING),
+ _(DEFAULT),
+ _(DEFINED),
+ _(DEFINITIONS),
+ _(EMBEDDED),
+ _(ENCODED),
+ [DIRECTIVE_ENCODING_CONTROL] = "ENCODING-CONTROL",
+ _(END),
+ _(ENUMERATED),
+ _(EXCEPT),
+ _(EXPLICIT),
+ _(EXPORTS),
+ _(EXTENSIBILITY),
+ _(EXTERNAL),
+ _(FALSE),
+ _(FROM),
+ _(GeneralString),
+ _(GeneralizedTime),
+ _(GraphicString),
+ _(IA5String),
+ _(IDENTIFIER),
+ _(IMPLICIT),
+ _(IMPLIED),
+ _(IMPORTS),
+ _(INCLUDES),
+ _(INSTANCE),
+ _(INSTRUCTIONS),
+ _(INTEGER),
+ _(INTERSECTION),
+ _(ISO646String),
+ _(MAX),
+ _(MIN),
+ [DIRECTIVE_MINUS_INFINITY] = "MINUS-INFINITY",
+ [DIRECTIVE_NULL] = "NULL",
+ _(NumericString),
+ _(OBJECT),
+ _(OCTET),
+ _(OF),
+ _(OPTIONAL),
+ _(ObjectDescriptor),
+ _(PATTERN),
+ _(PDV),
+ [DIRECTIVE_PLUS_INFINITY] = "PLUS-INFINITY",
+ _(PRESENT),
+ _(PRIVATE),
+ _(PrintableString),
+ _(REAL),
+ [DIRECTIVE_RELATIVE_OID] = "RELATIVE-OID",
+ _(SEQUENCE),
+ _(SET),
+ _(SIZE),
+ _(STRING),
+ _(SYNTAX),
+ _(T61String),
+ _(TAGS),
+ _(TRUE),
+ _(TeletexString),
+ _(UNION),
+ _(UNIQUE),
+ _(UNIVERSAL),
+ _(UTCTime),
+ _(UTF8String),
+ _(UniversalString),
+ _(VideotexString),
+ _(VisibleString),
+ _(WITH)
+};
+
+struct action {
+ struct action *next;
+ unsigned char index;
+ char name[];
+};
+
+static struct action *action_list;
+static unsigned nr_actions;
+
+struct token {
+ unsigned short line;
+ enum token_type token_type : 8;
+ unsigned char size;
+ struct action *action;
+ const char *value;
+ struct type *type;
+};
+
+static struct token *token_list;
+static unsigned nr_tokens;
+
+static int directive_compare(const void *_key, const void *_pdir)
+{
+ const struct token *token = _key;
+ const char *const *pdir = _pdir, *dir = *pdir;
+ size_t dlen, clen;
+ int val;
+
+ dlen = strlen(dir);
+ clen = (dlen < token->size) ? dlen : token->size;
+
+ //printf("cmp(%*.*s,%s) = ",
+ // (int)token->size, (int)token->size, token->value,
+ // dir);
+
+ val = memcmp(token->value, dir, clen);
+ if (val != 0) {
+ //printf("%d [cmp]\n", val);
+ return val;
+ }
+
+ if (dlen == token->size) {
+ //printf("0\n");
+ return 0;
+ }
+ //printf("%d\n", (int)dlen - (int)token->size);
+ return dlen - token->size; /* shorter -> negative */
+}
+
+/*
+ * Tokenise an ASN.1 grammar
+ */
+static void tokenise(char *buffer, char *end)
+{
+ struct token *tokens;
+ char *line, *nl, *p, *q;
+ unsigned tix, lineno;
+
+ /* Assume we're going to have half as many tokens as we have
+ * characters
+ */
+ token_list = tokens = calloc((end - buffer) / 2, sizeof(struct token));
+ if (!tokens) {
+ perror(NULL);
+ exit(1);
+ }
+ tix = 0;
+
+ lineno = 0;
+ while (buffer < end) {
+ /* First of all, break out a line */
+ lineno++;
+ line = buffer;
+ nl = memchr(line, '\n', end - buffer);
+ if (!nl) {
+ buffer = nl = end;
+ } else {
+ buffer = nl + 1;
+ *nl = '\0';
+ }
+
+ /* Remove "--" comments */
+ p = line;
+ next_comment:
+ while ((p = memchr(p, '-', nl - p))) {
+ if (p[1] == '-') {
+ /* Found a comment; see if there's a terminator */
+ q = p + 2;
+ while ((q = memchr(q, '-', nl - q))) {
+ if (q[1] == '-') {
+ /* There is - excise the comment */
+ q += 2;
+ memmove(p, q, nl - q);
+ goto next_comment;
+ }
+ q++;
+ }
+ *p = '\0';
+ nl = p;
+ break;
+ } else {
+ p++;
+ }
+ }
+
+ p = line;
+ while (p < nl) {
+ /* Skip white space */
+ while (p < nl && isspace(*p))
+ *(p++) = 0;
+ if (p >= nl)
+ break;
+
+ tokens[tix].line = lineno;
+ tokens[tix].value = p;
+
+ /* Handle string tokens */
+ if (isalpha(*p)) {
+ const char **dir;
+
+ /* Can be a directive, type name or element
+ * name. Find the end of the name.
+ */
+ q = p + 1;
+ while (q < nl && (isalnum(*q) || *q == '-' || *q == '_'))
+ q++;
+ tokens[tix].size = q - p;
+ p = q;
+
+ /* If it begins with a lowercase letter then
+ * it's an element name
+ */
+ if (islower(tokens[tix].value[0])) {
+ tokens[tix++].token_type = TOKEN_ELEMENT_NAME;
+ continue;
+ }
+
+ /* Otherwise we need to search the directive
+ * table
+ */
+ dir = bsearch(&tokens[tix], directives,
+ sizeof(directives) / sizeof(directives[1]),
+ sizeof(directives[1]),
+ directive_compare);
+ if (dir) {
+ tokens[tix++].token_type = dir - directives;
+ continue;
+ }
+
+ tokens[tix++].token_type = TOKEN_TYPE_NAME;
+ continue;
+ }
+
+ /* Handle numbers */
+ if (isdigit(*p)) {
+ /* Find the end of the number */
+ q = p + 1;
+ while (q < nl && (isdigit(*q)))
+ q++;
+ tokens[tix].size = q - p;
+ p = q;
+ tokens[tix++].token_type = TOKEN_NUMBER;
+ continue;
+ }
+
+ if (nl - p >= 3) {
+ if (memcmp(p, "::=", 3) == 0) {
+ p += 3;
+ tokens[tix].size = 3;
+ tokens[tix++].token_type = TOKEN_ASSIGNMENT;
+ continue;
+ }
+ }
+
+ if (nl - p >= 2) {
+ if (memcmp(p, "({", 2) == 0) {
+ p += 2;
+ tokens[tix].size = 2;
+ tokens[tix++].token_type = TOKEN_OPEN_ACTION;
+ continue;
+ }
+ if (memcmp(p, "})", 2) == 0) {
+ p += 2;
+ tokens[tix].size = 2;
+ tokens[tix++].token_type = TOKEN_CLOSE_ACTION;
+ continue;
+ }
+ }
+
+ if (nl - p >= 1) {
+ tokens[tix].size = 1;
+ switch (*p) {
+ case '{':
+ p += 1;
+ tokens[tix++].token_type = TOKEN_OPEN_CURLY;
+ continue;
+ case '}':
+ p += 1;
+ tokens[tix++].token_type = TOKEN_CLOSE_CURLY;
+ continue;
+ case '[':
+ p += 1;
+ tokens[tix++].token_type = TOKEN_OPEN_SQUARE;
+ continue;
+ case ']':
+ p += 1;
+ tokens[tix++].token_type = TOKEN_CLOSE_SQUARE;
+ continue;
+ case ',':
+ p += 1;
+ tokens[tix++].token_type = TOKEN_COMMA;
+ continue;
+ default:
+ break;
+ }
+ }
+
+ fprintf(stderr, "%s:%u: Unknown character in grammar: '%c'\n",
+ filename, lineno, *p);
+ exit(1);
+ }
+ }
+
+ nr_tokens = tix;
+ printf("Extracted %u tokens\n", nr_tokens);
+
+#if 0
+ {
+ int n;
+ for (n = 0; n < nr_tokens; n++)
+ printf("Token %3u: '%*.*s'\n",
+ n,
+ (int)token_list[n].size, (int)token_list[n].size,
+ token_list[n].value);
+ }
+#endif
+}
+
+static void build_type_list(void);
+static void parse(void);
+static void render(FILE *out, FILE *hdr);
+
+/*
+ *
+ */
+int main(int argc, char **argv)
+{
+ struct stat st;
+ ssize_t readlen;
+ FILE *out, *hdr;
+ char *buffer, *p;
+ int fd;
+
+ if (argc != 4) {
+ fprintf(stderr, "Format: %s <grammar-file> <c-file> <hdr-file>\n",
+ argv[0]);
+ exit(2);
+ }
+
+ filename = argv[1];
+ outputname = argv[2];
+ headername = argv[3];
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0) {
+ perror(filename);
+ exit(1);
+ }
+
+ if (fstat(fd, &st) < 0) {
+ perror(filename);
+ exit(1);
+ }
+
+ if (!(buffer = malloc(st.st_size + 1))) {
+ perror(NULL);
+ exit(1);
+ }
+
+ if ((readlen = read(fd, buffer, st.st_size)) < 0) {
+ perror(filename);
+ exit(1);
+ }
+
+ if (close(fd) < 0) {
+ perror(filename);
+ exit(1);
+ }
+
+ if (readlen != st.st_size) {
+ fprintf(stderr, "%s: Short read\n", filename);
+ exit(1);
+ }
+
+ p = strrchr(argv[1], '/');
+ p = p ? p + 1 : argv[1];
+ grammar_name = strdup(p);
+ if (!p) {
+ perror(NULL);
+ exit(1);
+ }
+ p = strchr(grammar_name, '.');
+ if (p)
+ *p = '\0';
+
+ buffer[readlen] = 0;
+ tokenise(buffer, buffer + readlen);
+ build_type_list();
+ parse();
+
+ out = fopen(outputname, "w");
+ if (!out) {
+ perror(outputname);
+ exit(1);
+ }
+
+ hdr = fopen(headername, "w");
+ if (!out) {
+ perror(headername);
+ exit(1);
+ }
+
+ render(out, hdr);
+
+ if (fclose(out) < 0) {
+ perror(outputname);
+ exit(1);
+ }
+
+ if (fclose(hdr) < 0) {
+ perror(headername);
+ exit(1);
+ }
+
+ return 0;
+}
+
+enum compound {
+ NOT_COMPOUND,
+ SET,
+ SET_OF,
+ SEQUENCE,
+ SEQUENCE_OF,
+ CHOICE,
+ ANY,
+ TYPE_REF,
+ TAG_OVERRIDE
+};
+
+struct element {
+ struct type *type_def;
+ struct token *name;
+ struct token *type;
+ struct action *action;
+ struct element *children;
+ struct element *next;
+ struct element *render_next;
+ struct element *list_next;
+ uint8_t n_elements;
+ enum compound compound : 8;
+ enum asn1_class class : 8;
+ enum asn1_method method : 8;
+ uint8_t tag;
+ unsigned entry_index;
+ unsigned flags;
+#define ELEMENT_IMPLICIT 0x0001
+#define ELEMENT_EXPLICIT 0x0002
+#define ELEMENT_MARKED 0x0004
+#define ELEMENT_RENDERED 0x0008
+#define ELEMENT_SKIPPABLE 0x0010
+#define ELEMENT_CONDITIONAL 0x0020
+};
+
+struct type {
+ struct token *name;
+ struct token *def;
+ struct element *element;
+ unsigned ref_count;
+ unsigned flags;
+#define TYPE_STOP_MARKER 0x0001
+#define TYPE_BEGIN 0x0002
+};
+
+static struct type *type_list;
+static struct type **type_index;
+static unsigned nr_types;
+
+static int type_index_compare(const void *_a, const void *_b)
+{
+ const struct type *const *a = _a, *const *b = _b;
+
+ if ((*a)->name->size != (*b)->name->size)
+ return (*a)->name->size - (*b)->name->size;
+ else
+ return memcmp((*a)->name->value, (*b)->name->value,
+ (*a)->name->size);
+}
+
+static int type_finder(const void *_key, const void *_ti)
+{
+ const struct token *token = _key;
+ const struct type *const *ti = _ti;
+ const struct type *type = *ti;
+
+ if (token->size != type->name->size)
+ return token->size - type->name->size;
+ else
+ return memcmp(token->value, type->name->value,
+ token->size);
+}
+
+/*
+ * Build up a list of types and a sorted index to that list.
+ */
+static void build_type_list(void)
+{
+ struct type *types;
+ unsigned nr, t, n;
+
+ nr = 0;
+ for (n = 0; n < nr_tokens - 1; n++)
+ if (token_list[n + 0].token_type == TOKEN_TYPE_NAME &&
+ token_list[n + 1].token_type == TOKEN_ASSIGNMENT)
+ nr++;
+
+ if (nr == 0) {
+ fprintf(stderr, "%s: No defined types\n", filename);
+ exit(1);
+ }
+
+ nr_types = nr;
+ types = type_list = calloc(nr + 1, sizeof(type_list[0]));
+ if (!type_list) {
+ perror(NULL);
+ exit(1);
+ }
+ type_index = calloc(nr, sizeof(type_index[0]));
+ if (!type_index) {
+ perror(NULL);
+ exit(1);
+ }
+
+ t = 0;
+ types[t].flags |= TYPE_BEGIN;
+ for (n = 0; n < nr_tokens - 1; n++) {
+ if (token_list[n + 0].token_type == TOKEN_TYPE_NAME &&
+ token_list[n + 1].token_type == TOKEN_ASSIGNMENT) {
+ types[t].name = &token_list[n];
+ type_index[t] = &types[t];
+ t++;
+ }
+ }
+ types[t].name = &token_list[n + 1];
+ types[t].flags |= TYPE_STOP_MARKER;
+
+ qsort(type_index, nr, sizeof(type_index[0]), type_index_compare);
+
+ printf("Extracted %u types\n", nr_types);
+#if 0
+ for (n = 0; n < nr_types; n++) {
+ struct type *type = type_index[n];
+ printf("- %*.*s\n",
+ (int)type->name->size,
+ (int)type->name->size,
+ type->name->value);
+ }
+#endif
+}
+
+static struct element *parse_type(struct token **_cursor, struct token *stop,
+ struct token *name);
+
+/*
+ * Parse the token stream
+ */
+static void parse(void)
+{
+ struct token *cursor;
+ struct type *type;
+
+ /* Parse one type definition statement at a time */
+ type = type_list;
+ do {
+ cursor = type->name;
+
+ if (cursor[0].token_type != TOKEN_TYPE_NAME ||
+ cursor[1].token_type != TOKEN_ASSIGNMENT)
+ abort();
+ cursor += 2;
+
+ type->element = parse_type(&cursor, type[1].name, NULL);
+ type->element->type_def = type;
+
+ if (cursor != type[1].name) {
+ fprintf(stderr, "%s:%d: Parse error at token '%*.*s'\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+ }
+
+ } while (type++, !(type->flags & TYPE_STOP_MARKER));
+
+ printf("Extracted %u actions\n", nr_actions);
+}
+
+static struct element *element_list;
+
+static struct element *alloc_elem(struct token *type)
+{
+ struct element *e = calloc(1, sizeof(*e));
+ if (!e) {
+ perror(NULL);
+ exit(1);
+ }
+ e->list_next = element_list;
+ element_list = e;
+ return e;
+}
+
+static struct element *parse_compound(struct token **_cursor, struct token *end,
+ int alternates);
+
+/*
+ * Parse one type definition statement
+ */
+static struct element *parse_type(struct token **_cursor, struct token *end,
+ struct token *name)
+{
+ struct element *top, *element;
+ struct action *action, **ppaction;
+ struct token *cursor = *_cursor;
+ struct type **ref;
+ char *p;
+ int labelled = 0, implicit = 0;
+
+ top = element = alloc_elem(cursor);
+ element->class = ASN1_UNIV;
+ element->method = ASN1_PRIM;
+ element->tag = token_to_tag[cursor->token_type];
+ element->name = name;
+
+ /* Extract the tag value if one given */
+ if (cursor->token_type == TOKEN_OPEN_SQUARE) {
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ switch (cursor->token_type) {
+ case DIRECTIVE_UNIVERSAL:
+ element->class = ASN1_UNIV;
+ cursor++;
+ break;
+ case DIRECTIVE_APPLICATION:
+ element->class = ASN1_APPL;
+ cursor++;
+ break;
+ case TOKEN_NUMBER:
+ element->class = ASN1_CONT;
+ break;
+ case DIRECTIVE_PRIVATE:
+ element->class = ASN1_PRIV;
+ cursor++;
+ break;
+ default:
+ fprintf(stderr, "%s:%d: Unrecognised tag class token '%*.*s'\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+ }
+
+ if (cursor >= end)
+ goto overrun_error;
+ if (cursor->token_type != TOKEN_NUMBER) {
+ fprintf(stderr, "%s:%d: Missing tag number '%*.*s'\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+ }
+
+ element->tag &= ~0x1f;
+ element->tag |= strtoul(cursor->value, &p, 10);
+ if (p - cursor->value != cursor->size)
+ abort();
+ cursor++;
+
+ if (cursor >= end)
+ goto overrun_error;
+ if (cursor->token_type != TOKEN_CLOSE_SQUARE) {
+ fprintf(stderr, "%s:%d: Missing closing square bracket '%*.*s'\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+ }
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ labelled = 1;
+ }
+
+ /* Handle implicit and explicit markers */
+ if (cursor->token_type == DIRECTIVE_IMPLICIT) {
+ element->flags |= ELEMENT_IMPLICIT;
+ implicit = 1;
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ } else if (cursor->token_type == DIRECTIVE_EXPLICIT) {
+ element->flags |= ELEMENT_EXPLICIT;
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ }
+
+ if (labelled) {
+ if (!implicit)
+ element->method |= ASN1_CONS;
+ element->compound = implicit ? TAG_OVERRIDE : SEQUENCE;
+ element->children = alloc_elem(cursor);
+ element = element->children;
+ element->class = ASN1_UNIV;
+ element->method = ASN1_PRIM;
+ element->tag = token_to_tag[cursor->token_type];
+ element->name = name;
+ }
+
+ /* Extract the type we're expecting here */
+ element->type = cursor;
+ switch (cursor->token_type) {
+ case DIRECTIVE_ANY:
+ element->compound = ANY;
+ cursor++;
+ break;
+
+ case DIRECTIVE_NULL:
+ case DIRECTIVE_BOOLEAN:
+ case DIRECTIVE_ENUMERATED:
+ case DIRECTIVE_INTEGER:
+ element->compound = NOT_COMPOUND;
+ cursor++;
+ break;
+
+ case DIRECTIVE_EXTERNAL:
+ element->method = ASN1_CONS;
+
+ case DIRECTIVE_BMPString:
+ case DIRECTIVE_GeneralString:
+ case DIRECTIVE_GraphicString:
+ case DIRECTIVE_IA5String:
+ case DIRECTIVE_ISO646String:
+ case DIRECTIVE_NumericString:
+ case DIRECTIVE_PrintableString:
+ case DIRECTIVE_T61String:
+ case DIRECTIVE_TeletexString:
+ case DIRECTIVE_UniversalString:
+ case DIRECTIVE_UTF8String:
+ case DIRECTIVE_VideotexString:
+ case DIRECTIVE_VisibleString:
+ case DIRECTIVE_ObjectDescriptor:
+ case DIRECTIVE_GeneralizedTime:
+ case DIRECTIVE_UTCTime:
+ element->compound = NOT_COMPOUND;
+ cursor++;
+ break;
+
+ case DIRECTIVE_BIT:
+ case DIRECTIVE_OCTET:
+ element->compound = NOT_COMPOUND;
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ if (cursor->token_type != DIRECTIVE_STRING)
+ goto parse_error;
+ cursor++;
+ break;
+
+ case DIRECTIVE_OBJECT:
+ element->compound = NOT_COMPOUND;
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ if (cursor->token_type != DIRECTIVE_IDENTIFIER)
+ goto parse_error;
+ cursor++;
+ break;
+
+ case TOKEN_TYPE_NAME:
+ element->compound = TYPE_REF;
+ ref = bsearch(cursor, type_index, nr_types, sizeof(type_index[0]),
+ type_finder);
+ if (!ref) {
+ fprintf(stderr, "%s:%d: Type '%*.*s' undefined\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+ }
+ cursor->type = *ref;
+ (*ref)->ref_count++;
+ cursor++;
+ break;
+
+ case DIRECTIVE_CHOICE:
+ element->compound = CHOICE;
+ cursor++;
+ element->children = parse_compound(&cursor, end, 1);
+ break;
+
+ case DIRECTIVE_SEQUENCE:
+ element->compound = SEQUENCE;
+ element->method = ASN1_CONS;
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ if (cursor->token_type == DIRECTIVE_OF) {
+ element->compound = SEQUENCE_OF;
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ element->children = parse_type(&cursor, end, NULL);
+ } else {
+ element->children = parse_compound(&cursor, end, 0);
+ }
+ break;
+
+ case DIRECTIVE_SET:
+ element->compound = SET;
+ element->method = ASN1_CONS;
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ if (cursor->token_type == DIRECTIVE_OF) {
+ element->compound = SET_OF;
+ cursor++;
+ if (cursor >= end)
+ goto parse_error;
+ element->children = parse_type(&cursor, end, NULL);
+ } else {
+ element->children = parse_compound(&cursor, end, 1);
+ }
+ break;
+
+ default:
+ fprintf(stderr, "%s:%d: Token '%*.*s' does not introduce a type\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+ }
+
+ /* Handle elements that are optional */
+ if (cursor < end && (cursor->token_type == DIRECTIVE_OPTIONAL ||
+ cursor->token_type == DIRECTIVE_DEFAULT)
+ ) {
+ cursor++;
+ top->flags |= ELEMENT_SKIPPABLE;
+ }
+
+ if (cursor < end && cursor->token_type == TOKEN_OPEN_ACTION) {
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ if (cursor->token_type != TOKEN_ELEMENT_NAME) {
+ fprintf(stderr, "%s:%d: Token '%*.*s' is not an action function name\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+ }
+
+ action = malloc(sizeof(struct action) + cursor->size + 1);
+ if (!action) {
+ perror(NULL);
+ exit(1);
+ }
+ action->index = 0;
+ memcpy(action->name, cursor->value, cursor->size);
+ action->name[cursor->size] = 0;
+
+ for (ppaction = &action_list;
+ *ppaction;
+ ppaction = &(*ppaction)->next
+ ) {
+ int cmp = strcmp(action->name, (*ppaction)->name);
+ if (cmp == 0) {
+ free(action);
+ action = *ppaction;
+ goto found;
+ }
+ if (cmp < 0) {
+ action->next = *ppaction;
+ *ppaction = action;
+ nr_actions++;
+ goto found;
+ }
+ }
+ action->next = NULL;
+ *ppaction = action;
+ nr_actions++;
+ found:
+
+ element->action = action;
+ cursor->action = action;
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ if (cursor->token_type != TOKEN_CLOSE_ACTION) {
+ fprintf(stderr, "%s:%d: Missing close action, got '%*.*s'\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+ }
+ cursor++;
+ }
+
+ *_cursor = cursor;
+ return top;
+
+parse_error:
+ fprintf(stderr, "%s:%d: Unexpected token '%*.*s'\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+
+overrun_error:
+ fprintf(stderr, "%s: Unexpectedly hit EOF\n", filename);
+ exit(1);
+}
+
+/*
+ * Parse a compound type list
+ */
+static struct element *parse_compound(struct token **_cursor, struct token *end,
+ int alternates)
+{
+ struct element *children, **child_p = &children, *element;
+ struct token *cursor = *_cursor, *name;
+
+ if (cursor->token_type != TOKEN_OPEN_CURLY) {
+ fprintf(stderr, "%s:%d: Expected compound to start with brace not '%*.*s'\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+ }
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+
+ if (cursor->token_type == TOKEN_OPEN_CURLY) {
+ fprintf(stderr, "%s:%d: Empty compound\n",
+ filename, cursor->line);
+ exit(1);
+ }
+
+ for (;;) {
+ name = NULL;
+ if (cursor->token_type == TOKEN_ELEMENT_NAME) {
+ name = cursor;
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ }
+
+ element = parse_type(&cursor, end, name);
+ if (alternates)
+ element->flags |= ELEMENT_SKIPPABLE | ELEMENT_CONDITIONAL;
+
+ *child_p = element;
+ child_p = &element->next;
+
+ if (cursor >= end)
+ goto overrun_error;
+ if (cursor->token_type != TOKEN_COMMA)
+ break;
+ cursor++;
+ if (cursor >= end)
+ goto overrun_error;
+ }
+
+ children->flags &= ~ELEMENT_CONDITIONAL;
+
+ if (cursor->token_type != TOKEN_CLOSE_CURLY) {
+ fprintf(stderr, "%s:%d: Expected compound closure, got '%*.*s'\n",
+ filename, cursor->line,
+ (int)cursor->size, (int)cursor->size, cursor->value);
+ exit(1);
+ }
+ cursor++;
+
+ *_cursor = cursor;
+ return children;
+
+overrun_error:
+ fprintf(stderr, "%s: Unexpectedly hit EOF\n", filename);
+ exit(1);
+}
+
+static void render_element(FILE *out, struct element *e, struct element *tag);
+static void render_out_of_line_list(FILE *out);
+
+static int nr_entries;
+static int render_depth = 1;
+static struct element *render_list, **render_list_p = &render_list;
+
+__attribute__((format(printf, 2, 3)))
+static void render_opcode(FILE *out, const char *fmt, ...)
+{
+ va_list va;
+
+ if (out) {
+ fprintf(out, "\t[%4d] =%*s", nr_entries, render_depth, "");
+ va_start(va, fmt);
+ vfprintf(out, fmt, va);
+ va_end(va);
+ }
+ nr_entries++;
+}
+
+__attribute__((format(printf, 2, 3)))
+static void render_more(FILE *out, const char *fmt, ...)
+{
+ va_list va;
+
+ if (out) {
+ va_start(va, fmt);
+ vfprintf(out, fmt, va);
+ va_end(va);
+ }
+}
+
+/*
+ * Render the grammar into a state machine definition.
+ */
+static void render(FILE *out, FILE *hdr)
+{
+ struct element *e;
+ struct action *action;
+ struct type *root;
+ int index;
+
+ fprintf(hdr, "/*\n");
+ fprintf(hdr, " * Automatically generated by asn1_compiler. Do not edit\n");
+ fprintf(hdr, " *\n");
+ fprintf(hdr, " * ASN.1 parser for %s\n", grammar_name);
+ fprintf(hdr, " */\n");
+ fprintf(hdr, "#include <linux/asn1_decoder.h>\n");
+ fprintf(hdr, "\n");
+ fprintf(hdr, "extern const struct asn1_decoder %s_decoder;\n", grammar_name);
+ if (ferror(hdr)) {
+ perror(headername);
+ exit(1);
+ }
+
+ fprintf(out, "/*\n");
+ fprintf(out, " * Automatically generated by asn1_compiler. Do not edit\n");
+ fprintf(out, " *\n");
+ fprintf(out, " * ASN.1 parser for %s\n", grammar_name);
+ fprintf(out, " */\n");
+ fprintf(out, "#include <linux/asn1_ber_bytecode.h>\n");
+ fprintf(out, "#include \"%s-asn1.h\"\n", grammar_name);
+ fprintf(out, "\n");
+ if (ferror(out)) {
+ perror(outputname);
+ exit(1);
+ }
+
+ /* Tabulate the action functions we might have to call */
+ fprintf(hdr, "\n");
+ index = 0;
+ for (action = action_list; action; action = action->next) {
+ action->index = index++;
+ fprintf(hdr,
+ "extern int %s(void *, size_t, unsigned char,"
+ " const void *, size_t);\n",
+ action->name);
+ }
+ fprintf(hdr, "\n");
+
+ fprintf(out, "enum %s_actions {\n", grammar_name);
+ for (action = action_list; action; action = action->next)
+ fprintf(out, "\tACT_%s = %u,\n",
+ action->name, action->index);
+ fprintf(out, "\tNR__%s_actions = %u\n", grammar_name, nr_actions);
+ fprintf(out, "};\n");
+
+ fprintf(out, "\n");
+ fprintf(out, "static const asn1_action_t %s_action_table[NR__%s_actions] = {\n",
+ grammar_name, grammar_name);
+ for (action = action_list; action; action = action->next)
+ fprintf(out, "\t[%4u] = %s,\n", action->index, action->name);
+ fprintf(out, "};\n");
+
+ if (ferror(out)) {
+ perror(outputname);
+ exit(1);
+ }
+
+ /* We do two passes - the first one calculates all the offsets */
+ printf("Pass 1\n");
+ nr_entries = 0;
+ root = &type_list[0];
+ render_element(NULL, root->element, NULL);
+ render_opcode(NULL, "ASN1_OP_COMPLETE,\n");
+ render_out_of_line_list(NULL);
+
+ for (e = element_list; e; e = e->list_next)
+ e->flags &= ~ELEMENT_RENDERED;
+
+ /* And then we actually render */
+ printf("Pass 2\n");
+ fprintf(out, "\n");
+ fprintf(out, "static const unsigned char %s_machine[] = {\n",
+ grammar_name);
+
+ nr_entries = 0;
+ root = &type_list[0];
+ render_element(out, root->element, NULL);
+ render_opcode(out, "ASN1_OP_COMPLETE,\n");
+ render_out_of_line_list(out);
+
+ fprintf(out, "};\n");
+
+ fprintf(out, "\n");
+ fprintf(out, "const struct asn1_decoder %s_decoder = {\n", grammar_name);
+ fprintf(out, "\t.machine = %s_machine,\n", grammar_name);
+ fprintf(out, "\t.machlen = sizeof(%s_machine),\n", grammar_name);
+ fprintf(out, "\t.actions = %s_action_table,\n", grammar_name);
+ fprintf(out, "};\n");
+}
+
+/*
+ * Render the out-of-line elements
+ */
+static void render_out_of_line_list(FILE *out)
+{
+ struct element *e, *ce;
+ const char *act;
+ int entry;
+
+ while ((e = render_list)) {
+ render_list = e->render_next;
+ if (!render_list)
+ render_list_p = &render_list;
+
+ render_more(out, "\n");
+ e->entry_index = entry = nr_entries;
+ render_depth++;
+ for (ce = e->children; ce; ce = ce->next)
+ render_element(out, ce, NULL);
+ render_depth--;
+
+ act = e->action ? "_ACT" : "";
+ switch (e->compound) {
+ case SEQUENCE:
+ render_opcode(out, "ASN1_OP_END_SEQ%s,\n", act);
+ break;
+ case SEQUENCE_OF:
+ render_opcode(out, "ASN1_OP_END_SEQ_OF%s,\n", act);
+ render_opcode(out, "_jump_target(%u),\n", entry);
+ break;
+ case SET:
+ render_opcode(out, "ASN1_OP_END_SET%s,\n", act);
+ break;
+ case SET_OF:
+ render_opcode(out, "ASN1_OP_END_SET_OF%s,\n", act);
+ render_opcode(out, "_jump_target(%u),\n", entry);
+ break;
+ }
+ if (e->action)
+ render_opcode(out, "_action(ACT_%s),\n",
+ e->action->name);
+ render_opcode(out, "ASN1_OP_RETURN,\n");
+ }
+}
+
+/*
+ * Render an element.
+ */
+static void render_element(FILE *out, struct element *e, struct element *tag)
+{
+ struct element *ec;
+ const char *cond, *act;
+ int entry, skippable = 0, outofline = 0;
+
+ if (e->flags & ELEMENT_SKIPPABLE ||
+ (tag && tag->flags & ELEMENT_SKIPPABLE))
+ skippable = 1;
+
+ if ((e->type_def && e->type_def->ref_count > 1) ||
+ skippable)
+ outofline = 1;
+
+ if (e->type_def && out) {
+ render_more(out, "\t// %*.*s\n",
+ (int)e->type_def->name->size, (int)e->type_def->name->size,
+ e->type_def->name->value);
+ }
+
+ /* Render the operation */
+ cond = (e->flags & ELEMENT_CONDITIONAL ||
+ (tag && tag->flags & ELEMENT_CONDITIONAL)) ? "COND_" : "";
+ act = e->action ? "_ACT" : "";
+ switch (e->compound) {
+ case ANY:
+ render_opcode(out, "ASN1_OP_%sMATCH_ANY%s,", cond, act);
+ if (e->name)
+ render_more(out, "\t\t// %*.*s",
+ (int)e->name->size, (int)e->name->size,
+ e->name->value);
+ render_more(out, "\n");
+ goto dont_render_tag;
+
+ case TAG_OVERRIDE:
+ render_element(out, e->children, e);
+ return;
+
+ case SEQUENCE:
+ case SEQUENCE_OF:
+ case SET:
+ case SET_OF:
+ render_opcode(out, "ASN1_OP_%sMATCH%s%s,",
+ cond,
+ outofline ? "_JUMP" : "",
+ skippable ? "_OR_SKIP" : "");
+ break;
+
+ case CHOICE:
+ goto dont_render_tag;
+
+ case TYPE_REF:
+ if (e->class == ASN1_UNIV && e->method == ASN1_PRIM && e->tag == 0)
+ goto dont_render_tag;
+ default:
+ render_opcode(out, "ASN1_OP_%sMATCH%s%s,",
+ cond, act,
+ skippable ? "_OR_SKIP" : "");
+ break;
+ }
+
+ if (e->name)
+ render_more(out, "\t\t// %*.*s",
+ (int)e->name->size, (int)e->name->size,
+ e->name->value);
+ render_more(out, "\n");
+
+ /* Render the tag */
+ if (!tag)
+ tag = e;
+ if (tag->class == ASN1_UNIV &&
+ tag->tag != 14 &&
+ tag->tag != 15 &&
+ tag->tag != 31)
+ render_opcode(out, "_tag(%s, %s, %s),\n",
+ asn1_classes[tag->class],
+ asn1_methods[tag->method | e->method],
+ asn1_universal_tags[tag->tag]);
+ else
+ render_opcode(out, "_tagn(%s, %s, %2u),\n",
+ asn1_classes[tag->class],
+ asn1_methods[tag->method | e->method],
+ tag->tag);
+ tag = NULL;
+dont_render_tag:
+
+ /* Deal with compound types */
+ switch (e->compound) {
+ case TYPE_REF:
+ render_element(out, e->type->type->element, tag);
+ if (e->action)
+ render_opcode(out, "ASN1_OP_ACT,\n");
+ break;
+
+ case SEQUENCE:
+ if (outofline) {
+ /* Render out-of-line for multiple use or
+ * skipability */
+ render_opcode(out, "_jump_target(%u),", e->entry_index);
+ if (e->type_def && e->type_def->name)
+ render_more(out, "\t\t// --> %*.*s",
+ (int)e->type_def->name->size,
+ (int)e->type_def->name->size,
+ e->type_def->name->value);
+ render_more(out, "\n");
+ if (!(e->flags & ELEMENT_RENDERED)) {
+ e->flags |= ELEMENT_RENDERED;
+ *render_list_p = e;
+ render_list_p = &e->render_next;
+ }
+ return;
+ } else {
+ /* Render inline for single use */
+ render_depth++;
+ for (ec = e->children; ec; ec = ec->next)
+ render_element(out, ec, NULL);
+ render_depth--;
+ render_opcode(out, "ASN1_OP_END_SEQ%s,\n", act);
+ }
+ break;
+
+ case SEQUENCE_OF:
+ case SET_OF:
+ if (outofline) {
+ /* Render out-of-line for multiple use or
+ * skipability */
+ render_opcode(out, "_jump_target(%u),", e->entry_index);
+ if (e->type_def && e->type_def->name)
+ render_more(out, "\t\t// --> %*.*s",
+ (int)e->type_def->name->size,
+ (int)e->type_def->name->size,
+ e->type_def->name->value);
+ render_more(out, "\n");
+ if (!(e->flags & ELEMENT_RENDERED)) {
+ e->flags |= ELEMENT_RENDERED;
+ *render_list_p = e;
+ render_list_p = &e->render_next;
+ }
+ return;
+ } else {
+ /* Render inline for single use */
+ entry = nr_entries;
+ render_depth++;
+ render_element(out, e->children, NULL);
+ render_depth--;
+ if (e->compound == SEQUENCE_OF)
+ render_opcode(out, "ASN1_OP_END_SEQ_OF%s,\n", act);
+ else
+ render_opcode(out, "ASN1_OP_END_SET_OF%s,\n", act);
+ render_opcode(out, "_jump_target(%u),\n", entry);
+ }
+ break;
+
+ case SET:
+ /* I can't think of a nice way to do SET support without having
+ * a stack of bitmasks to make sure no element is repeated.
+ * The bitmask has also to be checked that no non-optional
+ * elements are left out whilst not preventing optional
+ * elements from being left out.
+ */
+ fprintf(stderr, "The ASN.1 SET type is not currently supported.\n");
+ exit(1);
+
+ case CHOICE:
+ for (ec = e->children; ec; ec = ec->next)
+ render_element(out, ec, NULL);
+ if (!skippable)
+ render_opcode(out, "ASN1_OP_COND_FAIL,\n");
+ if (e->action)
+ render_opcode(out, "ASN1_OP_ACT,\n");
+ break;
+
+ default:
+ break;
+ }
+
+ if (e->action)
+ render_opcode(out, "_action(ACT_%s),\n", e->action->name);
+}
diff --git a/scripts/sign-file b/scripts/sign-file
new file mode 100644
index 00000000000..e58e34e50ac
--- /dev/null
+++ b/scripts/sign-file
@@ -0,0 +1,115 @@
+#!/bin/sh
+#
+# Sign a module file using the given key.
+#
+# Format: sign-file <key> <x509> <src-file> <dst-file>
+#
+
+scripts=`dirname $0`
+
+CONFIG_MODULE_SIG_SHA512=y
+if [ -r .config ]
+then
+ . ./.config
+fi
+
+key="$1"
+x509="$2"
+src="$3"
+dst="$4"
+
+if [ ! -r "$key" ]
+then
+ echo "Can't read private key" >&2
+ exit 2
+fi
+
+if [ ! -r "$x509" ]
+then
+ echo "Can't read X.509 certificate" >&2
+ exit 2
+fi
+if [ ! -r "$x509.signer" ]
+then
+ echo "Can't read Signer name" >&2
+ exit 2;
+fi
+if [ ! -r "$x509.keyid" ]
+then
+ echo "Can't read Key identifier" >&2
+ exit 2;
+fi
+
+#
+# Signature parameters
+#
+algo=1 # Public-key crypto algorithm: RSA
+hash= # Digest algorithm
+id_type=1 # Identifier type: X.509
+
+#
+# Digest the data
+#
+dgst=
+if [ "$CONFIG_MODULE_SIG_SHA1" = "y" ]
+then
+ prologue="0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A, 0x05, 0x00, 0x04, 0x14"
+ dgst=-sha1
+ hash=2
+elif [ "$CONFIG_MODULE_SIG_SHA224" = "y" ]
+then
+ prologue="0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04, 0x05, 0x00, 0x04, 0x1C"
+ dgst=-sha224
+ hash=7
+elif [ "$CONFIG_MODULE_SIG_SHA256" = "y" ]
+then
+ prologue="0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20"
+ dgst=-sha256
+ hash=4
+elif [ "$CONFIG_MODULE_SIG_SHA384" = "y" ]
+then
+ prologue="0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x05, 0x00, 0x04, 0x30"
+ dgst=-sha384
+ hash=5
+elif [ "$CONFIG_MODULE_SIG_SHA512" = "y" ]
+then
+ prologue="0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40"
+ dgst=-sha512
+ hash=6
+else
+ echo "$0: Can't determine hash algorithm" >&2
+ exit 2
+fi
+
+(
+perl -e "binmode STDOUT; print pack(\"C*\", $prologue)" || exit $?
+openssl dgst $dgst -binary $src || exit $?
+) >$src.dig || exit $?
+
+#
+# Generate the binary signature, which will be just the integer that comprises
+# the signature with no metadata attached.
+#
+openssl rsautl -sign -inkey $key -keyform PEM -in $src.dig -out $src.sig || exit $?
+signerlen=`stat -c %s $x509.signer`
+keyidlen=`stat -c %s $x509.keyid`
+siglen=`stat -c %s $src.sig`
+
+#
+# Build the signed binary
+#
+(
+ cat $src || exit $?
+ echo '~Module signature appended~' || exit $?
+ cat $x509.signer $x509.keyid || exit $?
+
+ # Preface each signature integer with a 2-byte BE length
+ perl -e "binmode STDOUT; print pack(\"n\", $siglen)" || exit $?
+ cat $src.sig || exit $?
+
+ # Generate the information block
+ perl -e "binmode STDOUT; print pack(\"CCCCCxxxN\", $algo, $hash, $id_type, $signerlen, $keyidlen, $siglen + 2)" || exit $?
+) >$dst~ || exit $?
+
+# Permit in-place signing
+mv $dst~ $dst || exit $?
diff --git a/scripts/x509keyid b/scripts/x509keyid
new file mode 100755
index 00000000000..c8e91a4af38
--- /dev/null
+++ b/scripts/x509keyid
@@ -0,0 +1,268 @@
+#!/usr/bin/perl -w
+#
+# Generate an identifier from an X.509 certificate that can be placed in a
+# module signature to indentify the key to use.
+#
+# Format:
+#
+# ./scripts/x509keyid <x509-cert> <signer's-name> <key-id>
+#
+# We read the DER-encoded X509 certificate and parse it to extract the Subject
+# name and Subject Key Identifier. The provide the data we need to build the
+# certificate identifier.
+#
+# The signer's name part of the identifier is fabricated from the commonName,
+# the organizationName or the emailAddress components of the X.509 subject
+# name and written to the second named file.
+#
+# The subject key ID to select which of that signer's certificates we're
+# intending to use to sign the module is written to the third named file.
+#
+use strict;
+
+my $raw_data;
+
+die "Need three filenames\n" if ($#ARGV != 2);
+
+my $src = $ARGV[0];
+
+open(FD, "<$src") || die $src;
+binmode FD;
+my @st = stat(FD);
+die $src if (!@st);
+read(FD, $raw_data, $st[7]) || die $src;
+close(FD);
+
+my $UNIV = 0 << 6;
+my $APPL = 1 << 6;
+my $CONT = 2 << 6;
+my $PRIV = 3 << 6;
+
+my $CONS = 0x20;
+
+my $BOOLEAN = 0x01;
+my $INTEGER = 0x02;
+my $BIT_STRING = 0x03;
+my $OCTET_STRING = 0x04;
+my $NULL = 0x05;
+my $OBJ_ID = 0x06;
+my $UTF8String = 0x0c;
+my $SEQUENCE = 0x10;
+my $SET = 0x11;
+my $UTCTime = 0x17;
+my $GeneralizedTime = 0x18;
+
+my %OIDs = (
+ pack("CCC", 85, 4, 3) => "commonName",
+ pack("CCC", 85, 4, 6) => "countryName",
+ pack("CCC", 85, 4, 10) => "organizationName",
+ pack("CCC", 85, 4, 11) => "organizationUnitName",
+ pack("CCCCCCCCC", 42, 134, 72, 134, 247, 13, 1, 1, 1) => "rsaEncryption",
+ pack("CCCCCCCCC", 42, 134, 72, 134, 247, 13, 1, 1, 5) => "sha1WithRSAEncryption",
+ pack("CCCCCCCCC", 42, 134, 72, 134, 247, 13, 1, 9, 1) => "emailAddress",
+ pack("CCC", 85, 29, 35) => "authorityKeyIdentifier",
+ pack("CCC", 85, 29, 14) => "subjectKeyIdentifier",
+ pack("CCC", 85, 29, 19) => "basicConstraints"
+);
+
+###############################################################################
+#
+# Extract an ASN.1 element from a string and return information about it.
+#
+###############################################################################
+sub asn1_extract($$@)
+{
+ my ($cursor, $expected_tag, $optional) = @_;
+
+ return [ -1 ]
+ if ($cursor->[1] == 0 && $optional);
+
+ die $src, ": ", $cursor->[0], ": ASN.1 data underrun (elem ", $cursor->[1], ")\n"
+ if ($cursor->[1] < 2);
+
+ my ($tag, $len) = unpack("CC", substr(${$cursor->[2]}, $cursor->[0], 2));
+
+ if ($expected_tag != -1 && $tag != $expected_tag) {
+ return [ -1 ]
+ if ($optional);
+ die $src, ": ", $cursor->[0], ": ASN.1 unexpected tag (", $tag,
+ " not ", $expected_tag, ")\n";
+ }
+
+ $cursor->[0] += 2;
+ $cursor->[1] -= 2;
+
+ die $src, ": ", $cursor->[0], ": ASN.1 long tag\n"
+ if (($tag & 0x1f) == 0x1f);
+ die $src, ": ", $cursor->[0], ": ASN.1 indefinite length\n"
+ if ($len == 0x80);
+
+ if ($len > 0x80) {
+ my $l = $len - 0x80;
+ die $src, ": ", $cursor->[0], ": ASN.1 data underrun (len len $l)\n"
+ if ($cursor->[1] < $l);
+
+ if ($l == 0x1) {
+ $len = unpack("C", substr(${$cursor->[2]}, $cursor->[0], 1));
+ } elsif ($l = 0x2) {
+ $len = unpack("n", substr(${$cursor->[2]}, $cursor->[0], 2));
+ } elsif ($l = 0x3) {
+ $len = unpack("C", substr(${$cursor->[2]}, $cursor->[0], 1)) << 16;
+ $len = unpack("n", substr(${$cursor->[2]}, $cursor->[0] + 1, 2));
+ } elsif ($l = 0x4) {
+ $len = unpack("N", substr(${$cursor->[2]}, $cursor->[0], 4));
+ } else {
+ die $src, ": ", $cursor->[0], ": ASN.1 element too long (", $l, ")\n";
+ }
+
+ $cursor->[0] += $l;
+ $cursor->[1] -= $l;
+ }
+
+ die $src, ": ", $cursor->[0], ": ASN.1 data underrun (", $len, ")\n"
+ if ($cursor->[1] < $len);
+
+ my $ret = [ $tag, [ $cursor->[0], $len, $cursor->[2] ] ];
+ $cursor->[0] += $len;
+ $cursor->[1] -= $len;
+
+ return $ret;
+}
+
+###############################################################################
+#
+# Retrieve the data referred to by a cursor
+#
+###############################################################################
+sub asn1_retrieve($)
+{
+ my ($cursor) = @_;
+ my ($offset, $len, $data) = @$cursor;
+ return substr($$data, $offset, $len);
+}
+
+###############################################################################
+#
+# Roughly parse the X.509 certificate
+#
+###############################################################################
+my $cursor = [ 0, length($raw_data), \$raw_data ];
+
+my $cert = asn1_extract($cursor, $UNIV | $CONS | $SEQUENCE);
+my $tbs = asn1_extract($cert->[1], $UNIV | $CONS | $SEQUENCE);
+my $version = asn1_extract($tbs->[1], $CONT | $CONS | 0, 1);
+my $serial_number = asn1_extract($tbs->[1], $UNIV | $INTEGER);
+my $sig_type = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE);
+my $issuer = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE);
+my $validity = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE);
+my $subject = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE);
+my $key = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE);
+my $issuer_uid = asn1_extract($tbs->[1], $CONT | $CONS | 1, 1);
+my $subject_uid = asn1_extract($tbs->[1], $CONT | $CONS | 2, 1);
+my $extension_list = asn1_extract($tbs->[1], $CONT | $CONS | 3, 1);
+
+my $subject_key_id = ();
+my $authority_key_id = ();
+
+#
+# Parse the extension list
+#
+if ($extension_list->[0] != -1) {
+ my $extensions = asn1_extract($extension_list->[1], $UNIV | $CONS | $SEQUENCE);
+
+ while ($extensions->[1]->[1] > 0) {
+ my $ext = asn1_extract($extensions->[1], $UNIV | $CONS | $SEQUENCE);
+ my $x_oid = asn1_extract($ext->[1], $UNIV | $OBJ_ID);
+ my $x_crit = asn1_extract($ext->[1], $UNIV | $BOOLEAN, 1);
+ my $x_val = asn1_extract($ext->[1], $UNIV | $OCTET_STRING);
+
+ my $raw_oid = asn1_retrieve($x_oid->[1]);
+ next if (!exists($OIDs{$raw_oid}));
+ my $x_type = $OIDs{$raw_oid};
+
+ my $raw_value = asn1_retrieve($x_val->[1]);
+
+ if ($x_type eq "subjectKeyIdentifier") {
+ my $vcursor = [ 0, length($raw_value), \$raw_value ];
+
+ $subject_key_id = asn1_extract($vcursor, $UNIV | $OCTET_STRING);
+ }
+ }
+}
+
+###############################################################################
+#
+# Determine what we're going to use as the signer's name. In order of
+# preference, take one of: commonName, organizationName or emailAddress.
+#
+###############################################################################
+my $org = "";
+my $cn = "";
+my $email = "";
+
+while ($subject->[1]->[1] > 0) {
+ my $rdn = asn1_extract($subject->[1], $UNIV | $CONS | $SET);
+ my $attr = asn1_extract($rdn->[1], $UNIV | $CONS | $SEQUENCE);
+ my $n_oid = asn1_extract($attr->[1], $UNIV | $OBJ_ID);
+ my $n_val = asn1_extract($attr->[1], -1);
+
+ my $raw_oid = asn1_retrieve($n_oid->[1]);
+ next if (!exists($OIDs{$raw_oid}));
+ my $n_type = $OIDs{$raw_oid};
+
+ my $raw_value = asn1_retrieve($n_val->[1]);
+
+ if ($n_type eq "organizationName") {
+ $org = $raw_value;
+ } elsif ($n_type eq "commonName") {
+ $cn = $raw_value;
+ } elsif ($n_type eq "emailAddress") {
+ $email = $raw_value;
+ }
+}
+
+my $id_name = $email;
+
+if ($org && $cn) {
+ # Don't use the organizationName if the commonName repeats it
+ if (length($org) <= length($cn) &&
+ substr($cn, 0, length($org)) eq $org) {
+ $id_name = $cn;
+ goto got_id_name;
+ }
+
+ # Or a signifcant chunk of it
+ if (length($org) >= 7 &&
+ length($cn) >= 7 &&
+ substr($cn, 0, 7) eq substr($org, 0, 7)) {
+ $id_name = $cn;
+ goto got_id_name;
+ }
+
+ $id_name = $org . ": " . $cn;
+} elsif ($org) {
+ $id_name = $org;
+} elsif ($cn) {
+ $id_name = $cn;
+}
+
+got_id_name:
+
+###############################################################################
+#
+# Output the signer's name and the key identifier that we're going to include
+# in module signatures.
+#
+###############################################################################
+die $src, ": ", "X.509: Couldn't find the Subject Key Identifier extension\n"
+ if (!$subject_key_id);
+
+my $id_key_id = asn1_retrieve($subject_key_id->[1]);
+
+open(OUTFD, ">$ARGV[1]") || die $ARGV[1];
+print OUTFD $id_name;
+close OUTFD || die $ARGV[1];
+
+open(OUTFD, ">$ARGV[2]") || die $ARGV[2];
+print OUTFD $id_key_id;
+close OUTFD || die $ARGV[2];
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-18 12:17:01 +0000