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Diffstat (limited to 'crypto/asymmetric_keys/public_key.c')
-rw-r--r--crypto/asymmetric_keys/public_key.c66
1 files changed, 43 insertions, 23 deletions
diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index cb2e291..97eb001 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -22,29 +22,25 @@
MODULE_LICENSE("GPL");
-const char *const pkey_algo[PKEY_ALGO__LAST] = {
+const char *const pkey_algo_name[PKEY_ALGO__LAST] = {
[PKEY_ALGO_DSA] = "DSA",
[PKEY_ALGO_RSA] = "RSA",
};
-EXPORT_SYMBOL_GPL(pkey_algo);
+EXPORT_SYMBOL_GPL(pkey_algo_name);
-const char *const pkey_hash_algo[PKEY_HASH__LAST] = {
- [PKEY_HASH_MD4] = "md4",
- [PKEY_HASH_MD5] = "md5",
- [PKEY_HASH_SHA1] = "sha1",
- [PKEY_HASH_RIPE_MD_160] = "rmd160",
- [PKEY_HASH_SHA256] = "sha256",
- [PKEY_HASH_SHA384] = "sha384",
- [PKEY_HASH_SHA512] = "sha512",
- [PKEY_HASH_SHA224] = "sha224",
+const struct public_key_algorithm *pkey_algo[PKEY_ALGO__LAST] = {
+#if defined(CONFIG_PUBLIC_KEY_ALGO_RSA) || \
+ defined(CONFIG_PUBLIC_KEY_ALGO_RSA_MODULE)
+ [PKEY_ALGO_RSA] = &RSA_public_key_algorithm,
+#endif
};
-EXPORT_SYMBOL_GPL(pkey_hash_algo);
+EXPORT_SYMBOL_GPL(pkey_algo);
-const char *const pkey_id_type[PKEY_ID_TYPE__LAST] = {
+const char *const pkey_id_type_name[PKEY_ID_TYPE__LAST] = {
[PKEY_ID_PGP] = "PGP",
[PKEY_ID_X509] = "X509",
};
-EXPORT_SYMBOL_GPL(pkey_id_type);
+EXPORT_SYMBOL_GPL(pkey_id_type_name);
/*
* Provide a part of a description of the key for /proc/keys.
@@ -56,7 +52,7 @@ static void public_key_describe(const struct key *asymmetric_key,
if (key)
seq_printf(m, "%s.%s",
- pkey_id_type[key->id_type], key->algo->name);
+ pkey_id_type_name[key->id_type], key->algo->name);
}
/*
@@ -78,21 +74,45 @@ EXPORT_SYMBOL_GPL(public_key_destroy);
/*
* Verify a signature using a public key.
*/
-static int public_key_verify_signature(const struct key *key,
- const struct public_key_signature *sig)
+int public_key_verify_signature(const struct public_key *pk,
+ const struct public_key_signature *sig)
{
- const struct public_key *pk = key->payload.data;
+ const struct public_key_algorithm *algo;
+
+ BUG_ON(!pk);
+ BUG_ON(!pk->mpi[0]);
+ BUG_ON(!pk->mpi[1]);
+ BUG_ON(!sig);
+ BUG_ON(!sig->digest);
+ BUG_ON(!sig->mpi[0]);
+
+ algo = pk->algo;
+ if (!algo) {
+ if (pk->pkey_algo >= PKEY_ALGO__LAST)
+ return -ENOPKG;
+ algo = pkey_algo[pk->pkey_algo];
+ if (!algo)
+ return -ENOPKG;
+ }
- if (!pk->algo->verify_signature)
+ if (!algo->verify_signature)
return -ENOTSUPP;
- if (sig->nr_mpi != pk->algo->n_sig_mpi) {
+ if (sig->nr_mpi != algo->n_sig_mpi) {
pr_debug("Signature has %u MPI not %u\n",
- sig->nr_mpi, pk->algo->n_sig_mpi);
+ sig->nr_mpi, algo->n_sig_mpi);
return -EINVAL;
}
- return pk->algo->verify_signature(pk, sig);
+ return algo->verify_signature(pk, sig);
+}
+EXPORT_SYMBOL_GPL(public_key_verify_signature);
+
+static int public_key_verify_signature_2(const struct key *key,
+ const struct public_key_signature *sig)
+{
+ const struct public_key *pk = key->payload.data;
+ return public_key_verify_signature(pk, sig);
}
/*
@@ -103,6 +123,6 @@ struct asymmetric_key_subtype public_key_subtype = {
.name = "public_key",
.describe = public_key_describe,
.destroy = public_key_destroy,
- .verify_signature = public_key_verify_signature,
+ .verify_signature = public_key_verify_signature_2,
};
EXPORT_SYMBOL_GPL(public_key_subtype);