[linux-block.git] / scripts / insert-sys-cert.c

/* Write the contents of the <certfile> into kernel symbol system_extra_cert
 *
 * Copyright (C) IBM Corporation, 2015
 *
 * Author: Mehmet Kayaalp <mkayaalp@linux.vnet.ibm.com>
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 * Usage: insert-sys-cert [-s <System.map> -b <vmlinux> -c <certfile>
 */

#define _GNU_SOURCE
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <limits.h>
#include <stdbool.h>
#include <errno.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include <elf.h>

#define CERT_SYM  "system_extra_cert"
#define USED_SYM  "system_extra_cert_used"
#define LSIZE_SYM "system_certificate_list_size"

#define info(format, args...) fprintf(stderr, "INFO:    " format, ## args)
#define warn(format, args...) fprintf(stdout, "WARNING: " format, ## args)
#define  err(format, args...) fprintf(stderr, "ERROR:   " format, ## args)

#if UINTPTR_MAX == 0xffffffff
#define CURRENT_ELFCLASS ELFCLASS32
#define Elf_Ehdr	Elf32_Ehdr
#define Elf_Shdr	Elf32_Shdr
#define Elf_Sym		Elf32_Sym
#else
#define CURRENT_ELFCLASS ELFCLASS64
#define Elf_Ehdr	Elf64_Ehdr
#define Elf_Shdr	Elf64_Shdr
#define Elf_Sym		Elf64_Sym
#endif

static unsigned char endianness(void)
{
	uint16_t two_byte = 0x00FF;
	uint8_t low_address = *((uint8_t *)&two_byte);

	if (low_address == 0)
		return ELFDATA2MSB;
	else
		return ELFDATA2LSB;
}

struct sym {
	char *name;
	unsigned long address;
	unsigned long offset;
	void *content;
	int size;
};

static unsigned long get_offset_from_address(Elf_Ehdr *hdr, unsigned long addr)
{
	Elf_Shdr *x;
	unsigned int i, num_sections;

	x = (void *)hdr + hdr->e_shoff;
	if (hdr->e_shnum == SHN_UNDEF)
		num_sections = x[0].sh_size;
	else
		num_sections = hdr->e_shnum;

	for (i = 1; i < num_sections; i++) {
		unsigned long start = x[i].sh_addr;
		unsigned long end = start + x[i].sh_size;
		unsigned long offset = x[i].sh_offset;

		if (addr >= start && addr <= end)
			return addr - start + offset;
	}
	return 0;
}


#define LINE_SIZE 100

static void get_symbol_from_map(Elf_Ehdr *hdr, FILE *f, char *name,
				struct sym *s)
{
	char l[LINE_SIZE];
	char *w, *p, *n;

	s->size = 0;
	s->address = 0;
	s->offset = 0;
	if (fseek(f, 0, SEEK_SET) != 0) {
		perror("File seek failed");
		exit(EXIT_FAILURE);
	}
	while (fgets(l, LINE_SIZE, f)) {
		p = strchr(l, '\n');
		if (!p) {
			err("Missing line ending.\n");
			return;
		}
		n = strstr(l, name);
		if (n)
			break;
	}
	if (!n) {
		err("Unable to find symbol: %s\n", name);
		return;
	}
	w = strchr(l, ' ');
	if (!w)
		return;

	*w = '\0';
	s->address = strtoul(l, NULL, 16);
	if (s->address == 0)
		return;
	s->offset = get_offset_from_address(hdr, s->address);
	s->name = name;
	s->content = (void *)hdr + s->offset;
}

static Elf_Sym *find_elf_symbol(Elf_Ehdr *hdr, Elf_Shdr *symtab, char *name)
{
	Elf_Sym *sym, *symtab_start;
	char *strtab, *symname;
	unsigned int link;
	Elf_Shdr *x;
	int i, n;

	x = (void *)hdr + hdr->e_shoff;
	link = symtab->sh_link;
	symtab_start = (void *)hdr + symtab->sh_offset;
	n = symtab->sh_size / symtab->sh_entsize;
	strtab = (void *)hdr + x[link].sh_offset;

	for (i = 0; i < n; i++) {
		sym = &symtab_start[i];
		symname = strtab + sym->st_name;
		if (strcmp(symname, name) == 0)
			return sym;
	}
	err("Unable to find symbol: %s\n", name);
	return NULL;
}

static void get_symbol_from_table(Elf_Ehdr *hdr, Elf_Shdr *symtab,
				  char *name, struct sym *s)
{
	Elf_Shdr *sec;
	int secndx;
	Elf_Sym *elf_sym;
	Elf_Shdr *x;

	x = (void *)hdr + hdr->e_shoff;
	s->size = 0;
	s->address = 0;
	s->offset = 0;
	elf_sym = find_elf_symbol(hdr, symtab, name);
	if (!elf_sym)
		return;
	secndx = elf_sym->st_shndx;
	if (!secndx)
		return;
	sec = &x[secndx];
	s->size = elf_sym->st_size;
	s->address = elf_sym->st_value;
	s->offset = s->address - sec->sh_addr
			       + sec->sh_offset;
	s->name = name;
	s->content = (void *)hdr + s->offset;
}

static Elf_Shdr *get_symbol_table(Elf_Ehdr *hdr)
{
	Elf_Shdr *x;
	unsigned int i, num_sections;

	x = (void *)hdr + hdr->e_shoff;
	if (hdr->e_shnum == SHN_UNDEF)
		num_sections = x[0].sh_size;
	else
		num_sections = hdr->e_shnum;

	for (i = 1; i < num_sections; i++)
		if (x[i].sh_type == SHT_SYMTAB)
			return &x[i];
	return NULL;
}

static void *map_file(char *file_name, int *size)
{
	struct stat st;
	void *map;
	int fd;

	fd = open(file_name, O_RDWR);
	if (fd < 0) {
		perror(file_name);
		return NULL;
	}
	if (fstat(fd, &st)) {
		perror("Could not determine file size");
		close(fd);
		return NULL;
	}
	*size = st.st_size;
	map = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
	if (map == MAP_FAILED) {
		perror("Mapping to memory failed");
		close(fd);
		return NULL;
	}
	close(fd);
	return map;
}

static char *read_file(char *file_name, int *size)
{
	struct stat st;
	char *buf;
	int fd;

	fd = open(file_name, O_RDONLY);
	if (fd < 0) {
		perror(file_name);
		return NULL;
	}
	if (fstat(fd, &st)) {
		perror("Could not determine file size");
		close(fd);
		return NULL;
	}
	*size = st.st_size;
	buf = malloc(*size);
	if (!buf) {
		perror("Allocating memory failed");
		close(fd);
		return NULL;
	}
	if (read(fd, buf, *size) != *size) {
		perror("File read failed");
		close(fd);
		return NULL;
	}
	close(fd);
	return buf;
}

static void print_sym(Elf_Ehdr *hdr, struct sym *s)
{
	info("sym:    %s\n", s->name);
	info("addr:   0x%lx\n", s->address);
	info("size:   %d\n", s->size);
	info("offset: 0x%lx\n", (unsigned long)s->offset);
}

static void print_usage(char *e)
{
	printf("Usage %s [-s <System.map>] -b <vmlinux> -c <certfile>\n", e);
}

int main(int argc, char **argv)
{
	char *system_map_file = NULL;
	char *vmlinux_file = NULL;
	char *cert_file = NULL;
	int vmlinux_size;
	int cert_size;
	Elf_Ehdr *hdr;
	char *cert;
	FILE *system_map;
	unsigned long *lsize;
	int *used;
	int opt;
	Elf_Shdr *symtab = NULL;
	struct sym cert_sym, lsize_sym, used_sym;

	while ((opt = getopt(argc, argv, "b:c:s:")) != -1) {
		switch (opt) {
		case 's':
			system_map_file = optarg;
			break;
		case 'b':
			vmlinux_file = optarg;
			break;
		case 'c':
			cert_file = optarg;
			break;
		default:
			break;
		}
	}

	if (!vmlinux_file || !cert_file) {
		print_usage(argv[0]);
		exit(EXIT_FAILURE);
	}

	cert = read_file(cert_file, &cert_size);
	if (!cert)
		exit(EXIT_FAILURE);

	hdr = map_file(vmlinux_file, &vmlinux_size);
	if (!hdr)
		exit(EXIT_FAILURE);

	if (vmlinux_size < sizeof(*hdr)) {
		err("Invalid ELF file.\n");
		exit(EXIT_FAILURE);
	}

	if ((hdr->e_ident[EI_MAG0] != ELFMAG0) ||
	    (hdr->e_ident[EI_MAG1] != ELFMAG1) ||
	    (hdr->e_ident[EI_MAG2] != ELFMAG2) ||
	    (hdr->e_ident[EI_MAG3] != ELFMAG3)) {
		err("Invalid ELF magic.\n");
		exit(EXIT_FAILURE);
	}

	if (hdr->e_ident[EI_CLASS] != CURRENT_ELFCLASS) {
		err("ELF class mismatch.\n");
		exit(EXIT_FAILURE);
	}

	if (hdr->e_ident[EI_DATA] != endianness()) {
		err("ELF endian mismatch.\n");
		exit(EXIT_FAILURE);
	}

	if (hdr->e_shoff > vmlinux_size) {
		err("Could not find section header.\n");
		exit(EXIT_FAILURE);
	}

	symtab = get_symbol_table(hdr);
	if (!symtab) {
		warn("Could not find the symbol table.\n");
		if (!system_map_file) {
			err("Please provide a System.map file.\n");
			print_usage(argv[0]);
			exit(EXIT_FAILURE);
		}

		system_map = fopen(system_map_file, "r");
		if (!system_map) {
			perror(system_map_file);
			exit(EXIT_FAILURE);
		}
		get_symbol_from_map(hdr, system_map, CERT_SYM, &cert_sym);
		get_symbol_from_map(hdr, system_map, USED_SYM, &used_sym);
		get_symbol_from_map(hdr, system_map, LSIZE_SYM, &lsize_sym);
		cert_sym.size = used_sym.address - cert_sym.address;
	} else {
		info("Symbol table found.\n");
		if (system_map_file)
			warn("System.map is ignored.\n");
		get_symbol_from_table(hdr, symtab, CERT_SYM, &cert_sym);
		get_symbol_from_table(hdr, symtab, USED_SYM, &used_sym);
		get_symbol_from_table(hdr, symtab, LSIZE_SYM, &lsize_sym);
	}

	if (!cert_sym.offset || !lsize_sym.offset || !used_sym.offset)
		exit(EXIT_FAILURE);

	print_sym(hdr, &cert_sym);
	print_sym(hdr, &used_sym);
	print_sym(hdr, &lsize_sym);

	lsize = (unsigned long *)lsize_sym.content;
	used = (int *)used_sym.content;

	if (cert_sym.size < cert_size) {
		err("Certificate is larger than the reserved area!\n");
		exit(EXIT_FAILURE);
	}

	/* If the existing cert is the same, don't overwrite */
	if (cert_size == *used &&
	    strncmp(cert_sym.content, cert, cert_size) == 0) {
		warn("Certificate was already inserted.\n");
		exit(EXIT_SUCCESS);
	}

	if (*used > 0)
		warn("Replacing previously inserted certificate.\n");

	memcpy(cert_sym.content, cert, cert_size);
	if (cert_size < cert_sym.size)
		memset(cert_sym.content + cert_size,
			0, cert_sym.size - cert_size);

	*lsize = *lsize + cert_size - *used;
	*used = cert_size;
	info("Inserted the contents of %s into %lx.\n", cert_file,
						cert_sym.address);
	info("Used %d bytes out of %d bytes reserved.\n", *used,
						 cert_sym.size);
	exit(EXIT_SUCCESS);
}
Commit	Line	Data
c4c36105 MK	1	/* Write the contents of the <certfile> into kernel symbol system_extra_cert
	2	*
	3	* Copyright (C) IBM Corporation, 2015
	4	*
	5	* Author: Mehmet Kayaalp <mkayaalp@linux.vnet.ibm.com>
	6	*
	7	* This software may be used and distributed according to the terms
	8	* of the GNU General Public License, incorporated herein by reference.
	9	*
	10	* Usage: insert-sys-cert [-s <System.map> -b <vmlinux> -c <certfile>
	11	*/
	12
	13	#define _GNU_SOURCE
	14	#include <stdio.h>
	15	#include <ctype.h>
	16	#include <string.h>
	17	#include <limits.h>
	18	#include <stdbool.h>
	19	#include <errno.h>
	20	#include <stdlib.h>
	21	#include <stdarg.h>
	22	#include <sys/types.h>
	23	#include <sys/stat.h>
	24	#include <sys/mman.h>
	25	#include <fcntl.h>
	26	#include <unistd.h>
	27	#include <elf.h>
	28
	29	#define CERT_SYM "system_extra_cert"
	30	#define USED_SYM "system_extra_cert_used"
	31	#define LSIZE_SYM "system_certificate_list_size"
	32
	33	#define info(format, args...) fprintf(stderr, "INFO: " format, ## args)
	34	#define warn(format, args...) fprintf(stdout, "WARNING: " format, ## args)
	35	#define err(format, args...) fprintf(stderr, "ERROR: " format, ## args)
	36
	37	#if UINTPTR_MAX == 0xffffffff
	38	#define CURRENT_ELFCLASS ELFCLASS32
	39	#define Elf_Ehdr Elf32_Ehdr
	40	#define Elf_Shdr Elf32_Shdr
	41	#define Elf_Sym Elf32_Sym
	42	#else
	43	#define CURRENT_ELFCLASS ELFCLASS64
	44	#define Elf_Ehdr Elf64_Ehdr
	45	#define Elf_Shdr Elf64_Shdr
	46	#define Elf_Sym Elf64_Sym
	47	#endif
	48
	49	static unsigned char endianness(void)
	50	{
	51	uint16_t two_byte = 0x00FF;
	52	uint8_t low_address = ((uint8_t )&two_byte);
	53
	54	if (low_address == 0)
	55	return ELFDATA2MSB;
	56	else
	57	return ELFDATA2LSB;
	58	}
	59
	60	struct sym {
	61	char *name;
	62	unsigned long address;
	63	unsigned long offset;
	64	void *content;
65	int size;
66	};
67
68	static unsigned long get_offset_from_address(Elf_Ehdr *hdr, unsigned long addr)
69	{
70	Elf_Shdr *x;
71	unsigned int i, num_sections;
72
73	x = (void *)hdr + hdr->e_shoff;
74	if (hdr->e_shnum == SHN_UNDEF)
75	num_sections = x[0].sh_size;
76	else
77	num_sections = hdr->e_shnum;
78
79	for (i = 1; i < num_sections; i++) {
80	unsigned long start = x[i].sh_addr;
81	unsigned long end = start + x[i].sh_size;
82	unsigned long offset = x[i].sh_offset;
83
84	if (addr >= start && addr <= end)
85	return addr - start + offset;
86	}
87	return 0;
88	}
89
90
91	#define LINE_SIZE 100
92
93	static void get_symbol_from_map(Elf_Ehdr hdr, FILE f, char *name,
94	struct sym *s)
95	{
96	char l[LINE_SIZE];
97	char w, p, *n;
98
99	s->size = 0;
100	s->address = 0;
101	s->offset = 0;
102	if (fseek(f, 0, SEEK_SET) != 0) {
103	perror("File seek failed");
104	exit(EXIT_FAILURE);
105	}
106	while (fgets(l, LINE_SIZE, f)) {
107	p = strchr(l, '\n');
108	if (!p) {
109	err("Missing line ending.\n");
110	return;
111	}
112	n = strstr(l, name);
113	if (n)
114	break;
115	}
116	if (!n) {
117	err("Unable to find symbol: %s\n", name);
118	return;
119	}
120	w = strchr(l, ' ');
121	if (!w)
122	return;
123
124	*w = '\0';
125	s->address = strtoul(l, NULL, 16);
126	if (s->address == 0)
127	return;
128	s->offset = get_offset_from_address(hdr, s->address);
129	s->name = name;
130	s->content = (void *)hdr + s->offset;
131	}
132
133	static Elf_Sym find_elf_symbol(Elf_Ehdr hdr, Elf_Shdr symtab, char name)
134	{
135	Elf_Sym sym, symtab_start;
136	char strtab, symname;
137	unsigned int link;
138	Elf_Shdr *x;
139	int i, n;
140
141	x = (void *)hdr + hdr->e_shoff;
142	link = symtab->sh_link;
143	symtab_start = (void *)hdr + symtab->sh_offset;
144	n = symtab->sh_size / symtab->sh_entsize;
145	strtab = (void *)hdr + x[link].sh_offset;
146
147	for (i = 0; i < n; i++) {
148	sym = &symtab_start[i];
149	symname = strtab + sym->st_name;
150	if (strcmp(symname, name) == 0)
151	return sym;
152	}
153	err("Unable to find symbol: %s\n", name);
154	return NULL;
155	}
156
157	static void get_symbol_from_table(Elf_Ehdr hdr, Elf_Shdr symtab,
158	char name, struct sym s)
159	{
160	Elf_Shdr *sec;
161	int secndx;
162	Elf_Sym *elf_sym;
163	Elf_Shdr *x;
164
165	x = (void *)hdr + hdr->e_shoff;
166	s->size = 0;
167	s->address = 0;
168	s->offset = 0;
169	elf_sym = find_elf_symbol(hdr, symtab, name);
170	if (!elf_sym)
171	return;
172	secndx = elf_sym->st_shndx;
173	if (!secndx)
174	return;
175	sec = &x[secndx];
176	s->size = elf_sym->st_size;
177	s->address = elf_sym->st_value;
178	s->offset = s->address - sec->sh_addr
179	+ sec->sh_offset;
180	s->name = name;
181	s->content = (void *)hdr + s->offset;
182	}
183
184	static Elf_Shdr get_symbol_table(Elf_Ehdr hdr)
185	{
186	Elf_Shdr *x;
187	unsigned int i, num_sections;
188
189	x = (void *)hdr + hdr->e_shoff;
190	if (hdr->e_shnum == SHN_UNDEF)
191	num_sections = x[0].sh_size;
192	else
193	num_sections = hdr->e_shnum;
194
195	for (i = 1; i < num_sections; i++)
196	if (x[i].sh_type == SHT_SYMTAB)
197	return &x[i];
198	return NULL;
199	}
200
201	static void map_file(char file_name, int *size)
202	{
203	struct stat st;
204	void *map;
205	int fd;
206
207	fd = open(file_name, O_RDWR);
208	if (fd < 0) {
209	perror(file_name);
210	return NULL;
211	}
212	if (fstat(fd, &st)) {
213	perror("Could not determine file size");
214	close(fd);
215	return NULL;
216	}
217	*size = st.st_size;
218	map = mmap(NULL, *size, PROT_READ\|PROT_WRITE, MAP_SHARED, fd, 0);
219	if (map == MAP_FAILED) {
220	perror("Mapping to memory failed");
221	close(fd);
222	return NULL;
223	}
224	close(fd);
225	return map;
226	}
227
228	static char read_file(char file_name, int *size)
229	{
230	struct stat st;
231	char *buf;
232	int fd;
233
234	fd = open(file_name, O_RDONLY);
235	if (fd < 0) {
236	perror(file_name);
237	return NULL;
238	}
239	if (fstat(fd, &st)) {
240	perror("Could not determine file size");
241	close(fd);
242	return NULL;
243	}
244	*size = st.st_size;
245	buf = malloc(*size);
246	if (!buf) {
247	perror("Allocating memory failed");
248	close(fd);
249	return NULL;
250	}
251	if (read(fd, buf, size) != size) {
252	perror("File read failed");
253	close(fd);
254	return NULL;
255	}
256	close(fd);
257	return buf;
258	}
259
260	static void print_sym(Elf_Ehdr hdr, struct sym s)
261	{
262	info("sym: %s\n", s->name);
263	info("addr: 0x%lx\n", s->address);
264	info("size: %d\n", s->size);
265	info("offset: 0x%lx\n", (unsigned long)s->offset);
266	}
267
268	static void print_usage(char *e)
269	{
270	printf("Usage %s [-s <System.map>] -b <vmlinux> -c <certfile>\n", e);
271	}
272
273	int main(int argc, char **argv)
274	{
275	char *system_map_file = NULL;
276	char *vmlinux_file = NULL;
277	char *cert_file = NULL;
278	int vmlinux_size;
279	int cert_size;
280	Elf_Ehdr *hdr;
281	char *cert;
282	FILE *system_map;
283	unsigned long *lsize;
284	int *used;
285	int opt;
286	Elf_Shdr *symtab = NULL;
287	struct sym cert_sym, lsize_sym, used_sym;
288
289	while ((opt = getopt(argc, argv, "b:c:s:")) != -1) {
290	switch (opt) {
291	case 's':
292	system_map_file = optarg;
293	break;
294	case 'b':
295	vmlinux_file = optarg;
296	break;
297	case 'c':
298	cert_file = optarg;
299	break;
300	default:
301	break;
302	}
303	}
304
305	if (!vmlinux_file \|\| !cert_file) {
306	print_usage(argv[0]);
307	exit(EXIT_FAILURE);
308	}
309
310	cert = read_file(cert_file, &cert_size);
311	if (!cert)
312	exit(EXIT_FAILURE);
313
314	hdr = map_file(vmlinux_file, &vmlinux_size);
315	if (!hdr)
316	exit(EXIT_FAILURE);
317
318	if (vmlinux_size < sizeof(*hdr)) {
319	err("Invalid ELF file.\n");
320	exit(EXIT_FAILURE);
321	}
322
323	if ((hdr->e_ident[EI_MAG0] != ELFMAG0) \|\|
324	(hdr->e_ident[EI_MAG1] != ELFMAG1) \|\|
325	(hdr->e_ident[EI_MAG2] != ELFMAG2) \|\|
326	(hdr->e_ident[EI_MAG3] != ELFMAG3)) {
327	err("Invalid ELF magic.\n");
328	exit(EXIT_FAILURE);
329	}
330
331	if (hdr->e_ident[EI_CLASS] != CURRENT_ELFCLASS) {
332	err("ELF class mismatch.\n");
333	exit(EXIT_FAILURE);
334	}
335
336	if (hdr->e_ident[EI_DATA] != endianness()) {
337	err("ELF endian mismatch.\n");
338	exit(EXIT_FAILURE);
339	}
340
341	if (hdr->e_shoff > vmlinux_size) {
342	err("Could not find section header.\n");
343	exit(EXIT_FAILURE);
344	}
345
346	symtab = get_symbol_table(hdr);
347	if (!symtab) {
348	warn("Could not find the symbol table.\n");
349	if (!system_map_file) {
350	err("Please provide a System.map file.\n");
351	print_usage(argv[0]);
352	exit(EXIT_FAILURE);
353	}
354
355	system_map = fopen(system_map_file, "r");
356	if (!system_map) {
357	perror(system_map_file);
358	exit(EXIT_FAILURE);
359	}
360	get_symbol_from_map(hdr, system_map, CERT_SYM, &cert_sym);
361	get_symbol_from_map(hdr, system_map, USED_SYM, &used_sym);
362	get_symbol_from_map(hdr, system_map, LSIZE_SYM, &lsize_sym);
363	cert_sym.size = used_sym.address - cert_sym.address;
364	} else {
365	info("Symbol table found.\n");
366	if (system_map_file)
367	warn("System.map is ignored.\n");
368	get_symbol_from_table(hdr, symtab, CERT_SYM, &cert_sym);
369	get_symbol_from_table(hdr, symtab, USED_SYM, &used_sym);
370	get_symbol_from_table(hdr, symtab, LSIZE_SYM, &lsize_sym);
371	}
372
373	if (!cert_sym.offset \|\| !lsize_sym.offset \|\| !used_sym.offset)
374	exit(EXIT_FAILURE);
375
376	print_sym(hdr, &cert_sym);
377	print_sym(hdr, &used_sym);
378	print_sym(hdr, &lsize_sym);
379
380	lsize = (unsigned long *)lsize_sym.content;
381	used = (int *)used_sym.content;
382
383	if (cert_sym.size < cert_size) {
384	err("Certificate is larger than the reserved area!\n");
385	exit(EXIT_FAILURE);
386	}
387
388	/* If the existing cert is the same, don't overwrite */
389	if (cert_size == *used &&
390	strncmp(cert_sym.content, cert, cert_size) == 0) {
391	warn("Certificate was already inserted.\n");
392	exit(EXIT_SUCCESS);
393	}
394
395	if (*used > 0)
396	warn("Replacing previously inserted certificate.\n");
397
398	memcpy(cert_sym.content, cert, cert_size);
399	if (cert_size < cert_sym.size)
400	memset(cert_sym.content + cert_size,
401	0, cert_sym.size - cert_size);
402
403	lsize = lsize + cert_size - *used;
404	*used = cert_size;
405	info("Inserted the contents of %s into %lx.\n", cert_file,
406	cert_sym.address);
407	info("Used %d bytes out of %d bytes reserved.\n", *used,
408	cert_sym.size);
409	exit(EXIT_SUCCESS);
410	}