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-rw-r--r--crypto/algapi.c18
-rw-r--r--crypto/api.c19
-rw-r--r--crypto/tcrypt.c4
-rw-r--r--crypto/testmgr.c23
-rw-r--r--include/linux/crypto.h9
5 files changed, 63 insertions, 10 deletions
diff --git a/crypto/algapi.c b/crypto/algapi.c
index 9f15e11f5d73..53c5149e6abf 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -328,8 +328,16 @@ void crypto_alg_tested(const char *name, int err)
found:
q->cra_flags |= CRYPTO_ALG_DEAD;
alg = test->adult;
- if (err || list_empty(&alg->cra_list))
+
+ if (list_empty(&alg->cra_list))
+ goto complete;
+
+ if (err == -ECANCELED)
+ alg->cra_flags |= CRYPTO_ALG_FIPS_INTERNAL;
+ else if (err)
goto complete;
+ else
+ alg->cra_flags &= ~CRYPTO_ALG_FIPS_INTERNAL;
alg->cra_flags |= CRYPTO_ALG_TESTED;
@@ -610,6 +618,7 @@ int crypto_register_instance(struct crypto_template *tmpl,
{
struct crypto_larval *larval;
struct crypto_spawn *spawn;
+ u32 fips_internal = 0;
int err;
err = crypto_check_alg(&inst->alg);
@@ -632,11 +641,15 @@ int crypto_register_instance(struct crypto_template *tmpl,
spawn->inst = inst;
spawn->registered = true;
+ fips_internal |= spawn->alg->cra_flags;
+
crypto_mod_put(spawn->alg);
spawn = next;
}
+ inst->alg.cra_flags |= (fips_internal & CRYPTO_ALG_FIPS_INTERNAL);
+
larval = __crypto_register_alg(&inst->alg);
if (IS_ERR(larval))
goto unlock;
@@ -689,7 +702,8 @@ int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst,
if (IS_ERR(name))
return PTR_ERR(name);
- alg = crypto_find_alg(name, spawn->frontend, type, mask);
+ alg = crypto_find_alg(name, spawn->frontend,
+ type | CRYPTO_ALG_FIPS_INTERNAL, mask);
if (IS_ERR(alg))
return PTR_ERR(alg);
diff --git a/crypto/api.c b/crypto/api.c
index cf0869dd130b..549f9aced1da 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -223,6 +223,8 @@ static struct crypto_alg *crypto_larval_wait(struct crypto_alg *alg)
else if (crypto_is_test_larval(larval) &&
!(alg->cra_flags & CRYPTO_ALG_TESTED))
alg = ERR_PTR(-EAGAIN);
+ else if (alg->cra_flags & CRYPTO_ALG_FIPS_INTERNAL)
+ alg = ERR_PTR(-EAGAIN);
else if (!crypto_mod_get(alg))
alg = ERR_PTR(-EAGAIN);
crypto_mod_put(&larval->alg);
@@ -233,6 +235,7 @@ static struct crypto_alg *crypto_larval_wait(struct crypto_alg *alg)
static struct crypto_alg *crypto_alg_lookup(const char *name, u32 type,
u32 mask)
{
+ const u32 fips = CRYPTO_ALG_FIPS_INTERNAL;
struct crypto_alg *alg;
u32 test = 0;
@@ -240,8 +243,20 @@ static struct crypto_alg *crypto_alg_lookup(const char *name, u32 type,
test |= CRYPTO_ALG_TESTED;
down_read(&crypto_alg_sem);
- alg = __crypto_alg_lookup(name, type | test, mask | test);
- if (!alg && test) {
+ alg = __crypto_alg_lookup(name, (type | test) & ~fips,
+ (mask | test) & ~fips);
+ if (alg) {
+ if (((type | mask) ^ fips) & fips)
+ mask |= fips;
+ mask &= fips;
+
+ if (!crypto_is_larval(alg) &&
+ ((type ^ alg->cra_flags) & mask)) {
+ /* Algorithm is disallowed in FIPS mode. */
+ crypto_mod_put(alg);
+ alg = ERR_PTR(-ENOENT);
+ }
+ } else if (test) {
alg = __crypto_alg_lookup(name, type, mask);
if (alg && !crypto_is_larval(alg)) {
/* Test failed */
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index 2a808e843de5..2bacf8384f59 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -1473,8 +1473,8 @@ static inline int tcrypt_test(const char *alg)
pr_debug("testing %s\n", alg);
ret = alg_test(alg, alg, 0, 0);
- /* non-fips algs return -EINVAL in fips mode */
- if (fips_enabled && ret == -EINVAL)
+ /* non-fips algs return -EINVAL or -ECANCELED in fips mode */
+ if (fips_enabled && (ret == -EINVAL || ret == -ECANCELED))
ret = 0;
return ret;
}
diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 394d1952b2c5..5fabd7bbfba5 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -5650,6 +5650,13 @@ static int alg_find_test(const char *alg)
return -1;
}
+static int alg_fips_disabled(const char *driver, const char *alg)
+{
+ pr_info("alg: %s (%s) is disabled due to FIPS\n", alg, driver);
+
+ return -ECANCELED;
+}
+
int alg_test(const char *driver, const char *alg, u32 type, u32 mask)
{
int i;
@@ -5686,9 +5693,13 @@ int alg_test(const char *driver, const char *alg, u32 type, u32 mask)
if (i < 0 && j < 0)
goto notest;
- if (fips_enabled && ((i >= 0 && !alg_test_descs[i].fips_allowed) ||
- (j >= 0 && !alg_test_descs[j].fips_allowed)))
- goto non_fips_alg;
+ if (fips_enabled) {
+ if (j >= 0 && !alg_test_descs[j].fips_allowed)
+ return -EINVAL;
+
+ if (i >= 0 && !alg_test_descs[i].fips_allowed)
+ goto non_fips_alg;
+ }
rc = 0;
if (i >= 0)
@@ -5718,9 +5729,13 @@ test_done:
notest:
printk(KERN_INFO "alg: No test for %s (%s)\n", alg, driver);
+
+ if (type & CRYPTO_ALG_FIPS_INTERNAL)
+ return alg_fips_disabled(driver, alg);
+
return 0;
non_fips_alg:
- return -EINVAL;
+ return alg_fips_disabled(driver, alg);
}
#endif /* CONFIG_CRYPTO_MANAGER_DISABLE_TESTS */
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 855869e1fd32..2324ab6f1846 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -133,6 +133,15 @@
#define CRYPTO_ALG_ALLOCATES_MEMORY 0x00010000
/*
+ * Mark an algorithm as a service implementation only usable by a
+ * template and never by a normal user of the kernel crypto API.
+ * This is intended to be used by algorithms that are themselves
+ * not FIPS-approved but may instead be used to implement parts of
+ * a FIPS-approved algorithm (e.g., dh vs. ffdhe2048(dh)).
+ */
+#define CRYPTO_ALG_FIPS_INTERNAL 0x00020000
+
+/*
* Transform masks and values (for crt_flags).
*/
#define CRYPTO_TFM_NEED_KEY 0x00000001
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-21 04:44:20 +0300