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changeset 82:28fae57b3e29

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fcsim1-mkprov: add OTA_C and OTA_D key generation
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 10 Apr 2021 23:21:47 +0000
parents 8c23d2a9c013
children 3055d5c9e7a3
files utils/fcsim1-mkprov.c
diffstat 1 files changed, 26 insertions(+), 5 deletions(-) [+]
line wrap: on
line diff
--- a/utils/fcsim1-mkprov.c	Fri Apr 09 08:35:54 2021 +0000
+++ b/utils/fcsim1-mkprov.c	Sat Apr 10 23:21:47 2021 +0000
@@ -93,8 +93,23 @@
 	set_imsi(argv[optind+1]);
 }
 
+static unsigned
+make_odd_parity(byte)
+	unsigned byte;
+{
+	unsigned mask, p;
+
+	p = 0;
+	for (mask = 0x80; mask; mask >>= 1)
+		if (byte & mask)
+			p = !p;
+	if (!p)
+		byte ^= 0x01;
+	return byte;
+}
+
 static void
-get_random_ki(strbuf)
+get_random_key(strbuf, oddpar)
 	char *strbuf;
 {
 	u_char bin[16];
@@ -107,6 +122,10 @@
 		fprintf(stderr, "error reading from %s\n", random_file);
 		exit(1);
 	}
+	if (oddpar) {
+		for (n = 0; n < 16; n++)
+			bin[n] = make_odd_parity(bin[n]);
+	}
 	dp = strbuf;
 	for (n = 0; n < 16; n++) {
 		sprintf(dp, "%02X", bin[n]);
@@ -120,14 +139,16 @@
 {
 	unsigned acc_mask;
 	char iccid_str[20], imsi_str[16], ki_str[33];
-	char msisdn_str[21];
+	char msisdn_str[21], otac_str[33], otad_str[33];
 
 	nibbles_to_ascii(iccid_bin, 19, iccid_str);
 	nibbles_to_ascii(imsi_bin, 15, imsi_str);
 	acc_mask = 1 << access_class;
-	get_random_ki(ki_str);
-	printf("ICCID=%s IMSI=%s ACC=%04X Ki=%s", iccid_str, imsi_str,
-		acc_mask, ki_str);
+	get_random_key(ki_str, 0);
+	get_random_key(otac_str, 1);
+	get_random_key(otad_str, 1);
+	printf("ICCID=%s IMSI=%s ACC=%04X Ki=%s OTA_C=%s OTA_D=%s", iccid_str,
+		imsi_str, acc_mask, ki_str, otac_str, otad_str);
 	if (msisdn_set) {
 		fputs(" MSISDN=", stdout);
 		if (msisdn_plus)