From a9887010ed2da3fddaff83ceec80e2b71be8a966 Mon Sep 17 00:00:00 2001
From: Lei He <helei.sig11@bytedance.com>
Date: Fri, 5 Nov 2021 20:25:31 +0800
Subject: [PATCH] crypto: testmgr - Fix wrong test case of RSA
According to the BER encoding rules, integer value should be encoded
as two's complement, and if the highest bit of a positive integer
is 1, should add a leading zero-octet.
The kernel's built-in RSA algorithm cannot recognize negative numbers
when parsing keys, so it can pass this test case.
Export the key to file and run the following command to verify the
fix result:
openssl asn1parse -inform DER -in /path/to/key/file
Signed-off-by: Lei He <helei.sig11@bytedance.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
crypto/testmgr.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/crypto/testmgr.h b/crypto/testmgr.h
index 779720bf9364..a253d66ba1c1 100644
--- a/crypto/testmgr.h
+++ b/crypto/testmgr.h
@@ -257,9 +257,9 @@ static const struct akcipher_testvec rsa_tv_template[] = {
}, {
#endif
.key =
- "\x30\x82\x02\x1F" /* sequence of 543 bytes */
+ "\x30\x82\x02\x20" /* sequence of 544 bytes */
"\x02\x01\x01" /* version - integer of 1 byte */
- "\x02\x82\x01\x00" /* modulus - integer of 256 bytes */
+ "\x02\x82\x01\x01\x00" /* modulus - integer of 256 bytes */
"\xDB\x10\x1A\xC2\xA3\xF1\xDC\xFF\x13\x6B\xED\x44\xDF\xF0\x02\x6D"
"\x13\xC7\x88\xDA\x70\x6B\x54\xF1\xE8\x27\xDC\xC3\x0F\x99\x6A\xFA"
"\xC6\x67\xFF\x1D\x1E\x3C\x1D\xC1\xB5\x5F\x6C\xC0\xB2\x07\x3A\x6D"
@@ -299,7 +299,7 @@ static const struct akcipher_testvec rsa_tv_template[] = {
"\x02\x01\x00" /* exponent1 - integer of 1 byte */
"\x02\x01\x00" /* exponent2 - integer of 1 byte */
"\x02\x01\x00", /* coefficient - integer of 1 byte */
- .key_len = 547,
+ .key_len = 548,
.m = "\x54\x85\x9b\x34\x2c\x49\xea\x2a",
.c =
"\xb2\x97\x76\xb4\xae\x3e\x38\x3c\x7e\x64\x1f\xcc\xa2\x7f\xf6\xbe"