user/yubikey-personalization: Patches

* Update for GCC 10 compatibility.
* Memory safety issues.

1 files changed, 204 insertions, 0 deletions

diff --git a/user/yubikey-personalization/uninit.patch b/user/yubikey-personalization/uninit.patch
new file mode 100644
index 000000000..713ce1699
--- /dev/null
+++ b/user/yubikey-personalization/uninit.patch
@@ -0,0 +1,204 @@
+From f86b334504693afe9ee6ec61416182d23c66e1ad Mon Sep 17 00:00:00 2001
+From: Gabriel Kihlman <g.kihlman@yubico.com>
+Date: Mon, 27 Apr 2020 14:52:53 +0200
+Subject: [PATCH] Initialize bufs to 0 to avoid potentially leaking
+ uninitialized memory
+
+Based on a report from Christian Reitter doing fuzzing with MSAN.
+
+Extracts of logs:
+
+==16111==WARNING: MemorySanitizer: use-of-uninitialized-value
+    #0 0x4d59d4 in yk_write_to_key
+/yubikey-personalization/ykcore/ykcore.c:715:8
+    #1 0x4d9c00 in _yk_write /yubikey-personalization/ykcore/ykcore.c:233:7
+    #2 0x4dc74d in yk_write_scan_map
+/yubikey-personalization/ykcore/ykcore.c:357:9
+    #3 0x4ce352 in ykpersonalize_main
+/yubikey-personalization/ykpersonalize.c:423:9
+[...]
+
+  Uninitialized value was stored to memory at
+    #0 0x45392b in __msan_memcpy
+(/yubikey-personalization/.libs/ykpersonalize+0x45392b)
+    #1 0x4d52f7 in yk_write_to_key
+/yubikey-personalization/ykcore/ykcore.c:689:2
+    #2 0x4d9c00 in _yk_write /yubikey-personalization/ykcore/ykcore.c:233:7
+    #3 0x4dc74d in yk_write_scan_map
+/yubikey-personalization/ykcore/ykcore.c:357:9
+    #4 0x4ce352 in ykpersonalize_main
+/yubikey-personalization/ykpersonalize.c:423:9
+[...]
+
+  Uninitialized value was created by an allocation of 'scan_codes' in
+the stack frame of function 'ykpersonalize_main'
+==18180==WARNING: MemorySanitizer: use-of-uninitialized-value
+    #0 0x4d5a24 in yk_write_to_key /yubikey-personalization/ykcore/ykcore.c:715:8
+    #1 0x4d9c50 in _yk_write /yubikey-personalization/ykcore/ykcore.c:233:7
+    #2 0x4dae6c in yk_write_command /yubikey-personalization/ykcore/ykcore.c:288:8
+    #3 0x4cec93 in ykpersonalize_main /yubikey-personalization/ykpersonalize.c:440:10
+
+  Uninitialized value was stored to memory at
+    #0 0x45392b in __msan_memcpy (/yubikey-personalization/.libs/ykpersonalize+0x45392b)
+    #1 0x4d5347 in yk_write_to_key /yubikey-personalization/ykcore/ykcore.c:689:2
+    #2 0x4d9c50 in _yk_write /yubikey-personalization/ykcore/ykcore.c:233:7
+    #3 0x4dae6c in yk_write_command /yubikey-personalization/ykcore/ykcore.c:288:8
+    #4 0x4cec93 in ykpersonalize_main /yubikey-personalization/ykpersonalize.c:440:10
+
+  Uninitialized value was stored to memory at
+    #0 0x45392b in __msan_memcpy (/yubikey-personalization/.libs/ykpersonalize+0x45392b)
+    #1 0x4dacdb in yk_write_command /yubikey-personalization/ykcore/ykcore.c:280:3
+    #2 0x4cec93 in ykpersonalize_main /yubikey-personalization/ykpersonalize.c:440:10
+
+  Uninitialized value was stored to memory at
+    #0 0x45392b in __msan_memcpy (/yubikey-personalization/.libs/ykpersonalize+0x45392b)
+    #1 0x7f6fd2ea32f9 in ykp_set_fixed /yubikey-personalization/ykpers.c:787:1
+    #2 0x50193c in _set_fixed /yubikey-personalization/ykpers-args.c:900:2
+    #3 0x4ed040 in args_to_config /yubikey-personalization/ykpers-args.c:558:9
+    #4 0x4c865c in ykpersonalize_main /yubikey-personalization/ykpersonalize.c:167:8
+
+  Uninitialized value was created by an allocation of 'fixedbin' in the stack frame of function '_set_fixed'
+    #0 0x501130 in _set_fixed /yubikey-personalization/ykpers-args.c:889
+---
+ ykpers-args.c   |  8 ++++----
+ ykpers.c        | 12 ++++++------
+ ykpersonalize.c | 13 +++++++------
+ 3 files changed, 17 insertions(+), 16 deletions(-)
+
+diff --git a/ykpers-args.c b/ykpers-args.c
+index 53f7c22b..62ff7b2f 100644
+--- a/ykpers-args.c
++++ b/ykpers-args.c
+@@ -548,7 +548,7 @@ int args_to_config(int argc, char **argv, YKP_CONFIG *cfg, char *oathid,
+ 			else if (strncmp(optarg, "uid", 3) == 0) {
+ 				char *uid = optarg+4;
+ 				size_t uidlen;
+-				unsigned char uidbin[256];
++				unsigned char uidbin[256] = {0};
+ 				size_t uidbinlen = 0;
+ 				int rc;
+ 				char *uidtmp = NULL;
+@@ -787,7 +787,7 @@ int args_to_config(int argc, char **argv, YKP_CONFIG *cfg, char *oathid,
+ 		size_t key_bytes = (size_t)ykp_get_supported_key_length(cfg);
+ 		int res = 0;
+ 		char *key_tmp = NULL;
+-		char keybuf[20];
++		char keybuf[20] = {0};
+ 
+ 		if(keylocation == 2) {
+ 			const char *prompt = " AES key, 16 bytes (32 characters hex) : ";
+@@ -865,7 +865,7 @@ int args_to_config(int argc, char **argv, YKP_CONFIG *cfg, char *oathid,
+ static int _set_fixed(char *opt, YKP_CONFIG *cfg) {
+ 	const char *fixed = opt;
+ 	size_t fixedlen = strlen (fixed);
+-	unsigned char fixedbin[256];
++	unsigned char fixedbin[256] = {0};
+ 	size_t fixedbinlen = 0;
+ 	int rc = hex_modhex_decode(fixedbin, &fixedbinlen,
+ 				   fixed, fixedlen,
+@@ -898,7 +898,7 @@ static int _format_decimal_as_hex(uint8_t *dst, size_t dst_len, uint8_t *src)
+ /* For details, see YubiKey Manual 2010-09-16 section 5.3.4 - OATH-HOTP Token Identifier */
+ static int _format_oath_id(uint8_t *dst, size_t dst_len, uint8_t vendor, uint8_t type, uint32_t mui)
+ {
+-	uint8_t buf[8 + 1];
++	uint8_t buf[8 + 1] = {0};
+ 
+ 	if (mui > 99999999)
+ 		return 0;
+diff --git a/ykpers.c b/ykpers.c
+index 7941d0e3..81cb0dff 100644
+--- a/ykpers.c
++++ b/ykpers.c
+@@ -264,7 +264,7 @@ int ykp_get_supported_key_length(const YKP_CONFIG *cfg)
+ 
+ /* Decode 128 bit AES key into cfg->ykcore_config.key */
+ int ykp_AES_key_from_hex(YKP_CONFIG *cfg, const char *hexkey) {
+-	char aesbin[256];
++	char aesbin[256] = {0};
+ 
+ 	/* Make sure that the hexkey is exactly 32 characters */
+ 	if (strlen(hexkey) != 32) {
+@@ -311,7 +311,7 @@ int ykp_HMAC_key_from_raw(YKP_CONFIG *cfg, const char *key) {
+  * and 32 bits into the first four bytes of cfg->ykcore_config.uid.
+ */
+ int ykp_HMAC_key_from_hex(YKP_CONFIG *cfg, const char *hexkey) {
+-	char aesbin[256];
++	char aesbin[256] = {0};
+ 	size_t i;
+ 
+ 	/* Make sure that the hexkey is exactly 40 characters */
+@@ -351,9 +351,9 @@ int ykp_AES_key_from_passphrase(YKP_CONFIG *cfg, const char *passphrase,
+ 			0
+ 		};
+ 		const char **random_place;
+-		uint8_t _salt[8];
++		uint8_t _salt[8] = {0};
+ 		size_t _salt_len = 0;
+-		unsigned char buf[sizeof(cfg->ykcore_config.key) + 4];
++		unsigned char buf[sizeof(cfg->ykcore_config.key) + 4] = {0};
+ 		int rc;
+ 		int key_bytes = ykp_get_supported_key_length(cfg);
+ 		YK_PRF_METHOD prf_method = {20, yk_hmac_sha1};
+@@ -931,7 +931,7 @@ static const char str_extended_flags[] = "extended_flags";
+ 
+ static int _ykp_legacy_export_config(const YKP_CONFIG *cfg, char *buf, size_t len) {
+ 	if (cfg) {
+-		char buffer[256];
++		char buffer[256] = {0};
+ 		struct map_st *p;
+ 		unsigned char t_flags;
+ 		bool key_bits_in_uid = false;
+@@ -1131,7 +1131,7 @@ int ykp_write_config(const YKP_CONFIG *cfg,
+ 				   void *userdata),
+ 		     void *userdata) {
+ 	if(cfg) {
+-		char buffer[1024];
++		char buffer[1024] = {0};
+ 		int ret = _ykp_legacy_export_config(cfg, buffer, 1024);
+ 		if(ret) {
+ 			writer(buffer, strlen(buffer), userdata);
+diff --git a/ykpersonalize.c b/ykpersonalize.c
+index 15338c6a..2c991e32 100644
+--- a/ykpersonalize.c
++++ b/ykpersonalize.c
+@@ -48,17 +48,17 @@ int main(int argc, char **argv)
+ 	FILE *outf = NULL; const char *outfname = NULL;
+ 	int data_format = YKP_FORMAT_LEGACY;
+ 	bool verbose = false;
+-	unsigned char access_code[256];
++	unsigned char access_code[256] = {0};
+ 	char *acc_code = NULL;
+ 	char *new_acc_code = NULL;
+-	unsigned char scan_codes[sizeof(SCAN_MAP)];
+-	unsigned char device_info[128];
++	unsigned char scan_codes[sizeof(SCAN_MAP)] = {0};
++	unsigned char device_info[128] = {0};
+ 	size_t device_info_len = 0;
+ 	YK_KEY *yk = 0;
+ 	YKP_CONFIG *cfg = ykp_alloc();
+ 	YK_STATUS *st = ykds_alloc();
+ 	bool autocommit = false;
+-	char data[1024];
++	char data[1024] = {0};
+ 	bool dry_run = false;
+ 
+ 	/* Options */
+@@ -184,7 +184,7 @@ int main(int argc, char **argv)
+ 		}
+ 	}
+ 	if(new_acc_code) {
+-		unsigned char accbin[256];
++		unsigned char accbin[256] = {0};
+ 		size_t accbinlen = 0;
+ 		int rc = hex_modhex_decode (accbin, &accbinlen,
+ 				new_acc_code, strlen(new_acc_code),
+@@ -261,7 +261,8 @@ int main(int argc, char **argv)
+ 			goto err;
+ 		}
+ 	} else {
+-		char commitbuf[256]; size_t commitlen;
++		char commitbuf[256] = {0};
++		size_t commitlen;
+ 
+ 		if (ykp_command(cfg) == SLOT_SWAP) {
+ 			fprintf(stderr, "Configuration in slot 1 and 2 will be swapped\n");