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authorStephan Müller <smueller@chronox.de>2022-02-01 09:41:32 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2022-02-11 20:22:01 +1100
commit37f36e5717869a69775ecb23baedf0f06ea940b4 (patch)
tree2079a33d7c0c708e353f00b0c14682a6ea729e30 /crypto
parentc9c28ed0ab611b6ee3bfab88eba334e272642433 (diff)
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crypto: hmac - disallow keys < 112 bits in FIPS mode
FIPS 140 requires a minimum security strength of 112 bits. This implies that the HMAC key must not be smaller than 112 in FIPS mode. This restriction implies that the test vectors for HMAC that have a key that is smaller than 112 bits must be disabled when FIPS support is compiled. Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/hmac.c4
-rw-r--r--crypto/testmgr.h9
2 files changed, 13 insertions, 0 deletions
diff --git a/crypto/hmac.c b/crypto/hmac.c
index 25856aa7ccbf..3610ff0b6739 100644
--- a/crypto/hmac.c
+++ b/crypto/hmac.c
@@ -15,6 +15,7 @@
#include <crypto/internal/hash.h>
#include <crypto/scatterwalk.h>
#include <linux/err.h>
+#include <linux/fips.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -51,6 +52,9 @@ static int hmac_setkey(struct crypto_shash *parent,
SHASH_DESC_ON_STACK(shash, hash);
unsigned int i;
+ if (fips_enabled && (keylen < 112 / 8))
+ return -EINVAL;
+
shash->tfm = hash;
if (keylen > bs) {
diff --git a/crypto/testmgr.h b/crypto/testmgr.h
index 17b37525f289..85ccf811f5e7 100644
--- a/crypto/testmgr.h
+++ b/crypto/testmgr.h
@@ -5715,6 +5715,7 @@ static const struct hash_testvec hmac_sha1_tv_template[] = {
.psize = 28,
.digest = "\xef\xfc\xdf\x6a\xe5\xeb\x2f\xa2\xd2\x74"
"\x16\xd5\xf1\x84\xdf\x9c\x25\x9a\x7c\x79",
+ .fips_skip = 1,
}, {
.key = "\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa",
.ksize = 20,
@@ -5804,6 +5805,7 @@ static const struct hash_testvec hmac_sha224_tv_template[] = {
"\x45\x69\x0f\x3a\x7e\x9e\x6d\x0f"
"\x8b\xbe\xa2\xa3\x9e\x61\x48\x00"
"\x8f\xd0\x5e\x44",
+ .fips_skip = 1,
}, {
.key = "\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
@@ -5947,6 +5949,7 @@ static const struct hash_testvec hmac_sha256_tv_template[] = {
"\x6a\x04\x24\x26\x08\x95\x75\xc7"
"\x5a\x00\x3f\x08\x9d\x27\x39\x83"
"\x9d\xec\x58\xb9\x64\xec\x38\x43",
+ .fips_skip = 1,
}, {
.key = "\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
@@ -6445,6 +6448,7 @@ static const struct hash_testvec hmac_sha384_tv_template[] = {
"\xe4\x2e\xc3\x73\x63\x22\x44\x5e"
"\x8e\x22\x40\xca\x5e\x69\xe2\xc7"
"\x8b\x32\x39\xec\xfa\xb2\x16\x49",
+ .fips_skip = 1,
}, {
.key = "\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
@@ -6545,6 +6549,7 @@ static const struct hash_testvec hmac_sha512_tv_template[] = {
"\x6d\x03\x4f\x65\xf8\xf0\xe6\xfd"
"\xca\xea\xb1\xa3\x4d\x4a\x6b\x4b"
"\x63\x6e\x07\x0a\x38\xbc\xe7\x37",
+ .fips_skip = 1,
}, {
.key = "\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
@@ -6640,6 +6645,7 @@ static const struct hash_testvec hmac_sha3_224_tv_template[] = {
"\x1b\x79\x86\x34\xad\x38\x68\x11"
"\xc2\xcf\xc8\x5b\xfa\xf5\xd5\x2b"
"\xba\xce\x5e\x66",
+ .fips_skip = 1,
}, {
.key = "\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
@@ -6727,6 +6733,7 @@ static const struct hash_testvec hmac_sha3_256_tv_template[] = {
"\x35\x96\xbb\xb0\xda\x73\xb8\x87"
"\xc9\x17\x1f\x93\x09\x5b\x29\x4a"
"\xe8\x57\xfb\xe2\x64\x5e\x1b\xa5",
+ .fips_skip = 1,
}, {
.key = "\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
@@ -6818,6 +6825,7 @@ static const struct hash_testvec hmac_sha3_384_tv_template[] = {
"\x3c\xa1\x35\x08\xa9\x32\x43\xce"
"\x48\xc0\x45\xdc\x00\x7f\x26\xa2"
"\x1b\x3f\x5e\x0e\x9d\xf4\xc2\x0a",
+ .fips_skip = 1,
}, {
.key = "\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
@@ -6917,6 +6925,7 @@ static const struct hash_testvec hmac_sha3_512_tv_template[] = {
"\xee\x7a\x0c\x31\xd0\x22\xa9\x5e"
"\x1f\xc9\x2b\xa9\xd7\x7d\xf8\x83"
"\x96\x02\x75\xbe\xb4\xe6\x20\x24",
+ .fips_skip = 1,
}, {
.key = "\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"
"\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa"