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-rw-r--r--crypto/rsa.c59
1 files changed, 55 insertions, 4 deletions
diff --git a/crypto/rsa.c b/crypto/rsa.c
index 591d15c415..64241854c8 100644
--- a/crypto/rsa.c
+++ b/crypto/rsa.c
@@ -380,11 +380,15 @@ static void rsa_convert_big_endian(uint32_t *dst, const uint32_t *src, int len)
dst[i] = fdt32_to_cpu(src[len - 1 - i]);
}
-int rsa_of_read_key(struct device_node *node, struct rsa_public_key *key)
+struct rsa_public_key *rsa_of_read_key(struct device_node *node)
{
const void *modulus, *rr;
const uint64_t *public_exponent;
int length;
+ struct rsa_public_key *key;
+ int err;
+
+ key = xzalloc(sizeof(*key));
of_property_read_u32(node, "rsa,num-bits", &key->len);
of_property_read_u32(node, "rsa,n0-inverse", &key->n0inv);
@@ -400,14 +404,16 @@ int rsa_of_read_key(struct device_node *node, struct rsa_public_key *key)
if (!key->len || !modulus || !rr) {
debug("%s: Missing RSA key info", __func__);
- return -EFAULT;
+ err = -EFAULT;
+ goto out;
}
/* Sanity check for stack size */
if (key->len > RSA_MAX_KEY_BITS || key->len < RSA_MIN_KEY_BITS) {
debug("RSA key bits %u outside allowed range %d..%d\n",
key->len, RSA_MIN_KEY_BITS, RSA_MAX_KEY_BITS);
- return -EFAULT;
+ err = -EFAULT;
+ goto out;
}
key->len /= sizeof(uint32_t) * 8;
@@ -418,5 +424,50 @@ int rsa_of_read_key(struct device_node *node, struct rsa_public_key *key)
rsa_convert_big_endian(key->modulus, modulus, key->len);
rsa_convert_big_endian(key->rr, rr, key->len);
- return 0;
+ err = 0;
+out:
+ if (err)
+ free(key);
+
+ return err ? ERR_PTR(err) : key;
+}
+
+void rsa_key_free(struct rsa_public_key *key)
+{
+ free(key->modulus);
+ free(key->rr);
+ free(key);
+}
+
+#ifdef CONFIG_CRYPTO_RSA_BUILTIN_KEYS
+#include "rsa-keys.h"
+
+extern const struct rsa_public_key * const __rsa_keys_start;
+extern const struct rsa_public_key * const __rsa_keys_end;
+
+struct rsa_public_key *rsa_get_key(const char *name)
+{
+ const struct rsa_public_key *key;
+ struct rsa_public_key *new;
+ const struct rsa_public_key * const *iter;
+
+ for (iter = &__rsa_keys_start; iter != &__rsa_keys_end; iter++) {
+ key = *iter;
+ if (!strcmp(name, key->key_name_hint))
+ goto found;
+ }
+
+ return ERR_PTR(-ENOENT);
+found:
+ new = xmemdup(key, sizeof(*key));
+ new->modulus = xmemdup(key->modulus, key->len * sizeof(uint32_t));
+ new->rr = xmemdup(key->rr, key->len * sizeof(uint32_t));
+
+ return new;
+}
+#else
+struct rsa_public_key *rsa_get_key(const char *name)
+{
+ return ERR_PTR(-ENOENT);
}
+#endif