/*
* NSS crypto backend implementation
*
- * Copyright (C) 2010-2011, Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2010-2021 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2010-2021 Milan Broz
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
+ * This file is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This program is distributed in the hope that it will be useful,
+ * This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this file; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <string.h>
#include <errno.h>
#include <nss.h>
-#include <nss/pk11pub.h>
-#include "crypto_backend.h"
+#include <pk11pub.h>
+#include "crypto_backend_internal.h"
+
+#define CONST_CAST(x) (x)(uintptr_t)
static int crypto_backend_initialised = 0;
+static char version[64];
struct hash_alg {
const char *name;
SECOidTag oid;
CK_MECHANISM_TYPE ck_type;
int length;
+ unsigned int block_length;
};
static struct hash_alg hash_algs[] = {
- { "sha1", SEC_OID_SHA1, CKM_SHA_1_HMAC, 20 },
- { "sha256", SEC_OID_SHA256, CKM_SHA256_HMAC, 32 },
- { "sha384", SEC_OID_SHA384, CKM_SHA384_HMAC, 48 },
- { "sha512", SEC_OID_SHA512, CKM_SHA512_HMAC, 64 },
-// { "ripemd160", SEC_OID_RIPEMD160, CKM_RIPEMD160_HMAC, 20 },
+ { "sha1", SEC_OID_SHA1, CKM_SHA_1_HMAC, 20, 64 },
+ { "sha256", SEC_OID_SHA256, CKM_SHA256_HMAC, 32, 64 },
+ { "sha384", SEC_OID_SHA384, CKM_SHA384_HMAC, 48, 128 },
+ { "sha512", SEC_OID_SHA512, CKM_SHA512_HMAC, 64, 128 },
+// { "ripemd160", SEC_OID_RIPEMD160, CKM_RIPEMD160_HMAC, 20, 64 },
{ NULL, 0, 0, 0 }
};
const struct hash_alg *hash;
};
+struct crypt_cipher {
+ struct crypt_cipher_kernel ck;
+};
+
static struct hash_alg *_get_alg(const char *name)
{
int i = 0;
return NULL;
}
-int crypt_backend_init(struct crypt_device *ctx)
+int crypt_backend_init(void)
{
+ int r;
+
if (crypto_backend_initialised)
return 0;
- log_dbg("Initialising NSS crypto backend.");
if (NSS_NoDB_Init(".") != SECSuccess)
return -EINVAL;
+#if HAVE_DECL_NSS_GETVERSION
+ r = snprintf(version, sizeof(version), "NSS %s", NSS_GetVersion());
+#else
+ r = snprintf(version, sizeof(version), "NSS");
+#endif
+ if (r < 0 || (size_t)r >= sizeof(version))
+ return -EINVAL;
+
crypto_backend_initialised = 1;
return 0;
}
+void crypt_backend_destroy(void)
+{
+ crypto_backend_initialised = 0;
+}
+
uint32_t crypt_backend_flags(void)
{
return 0;
}
+const char *crypt_backend_version(void)
+{
+ return crypto_backend_initialised ? version : "";
+}
+
/* HASH */
int crypt_hash_size(const char *name)
{
return 0;
}
-int crypt_hash_restart(struct crypt_hash *ctx)
+static int crypt_hash_restart(struct crypt_hash *ctx)
{
if (PK11_DigestBegin(ctx->md) != SECSuccess)
return -EINVAL;
int crypt_hash_write(struct crypt_hash *ctx, const char *buffer, size_t length)
{
- if (PK11_DigestOp(ctx->md, (unsigned char *)buffer, length) != SECSuccess)
+ if (PK11_DigestOp(ctx->md, CONST_CAST(unsigned char *)buffer, length) != SECSuccess)
return -EINVAL;
return 0;
unsigned char tmp[64];
unsigned int tmp_len;
- if (length > ctx->hash->length)
+ if (length > (size_t)ctx->hash->length)
return -EINVAL;
if (PK11_DigestFinal(ctx->md, tmp, &tmp_len, length) != SECSuccess)
return -EINVAL;
memcpy(buffer, tmp, length);
- memset(tmp, 0, sizeof(tmp));
+ crypt_backend_memzero(tmp, sizeof(tmp));
if (tmp_len < length)
return -EINVAL;
+ if (crypt_hash_restart(ctx))
+ return -EINVAL;
+
return 0;
}
-int crypt_hash_destroy(struct crypt_hash *ctx)
+void crypt_hash_destroy(struct crypt_hash *ctx)
{
PK11_DestroyContext(ctx->md, PR_TRUE);
memset(ctx, 0, sizeof(*ctx));
free(ctx);
- return 0;
}
/* HMAC */
}
int crypt_hmac_init(struct crypt_hmac **ctx, const char *name,
- const void *buffer, size_t length)
+ const void *key, size_t key_length)
{
struct crypt_hmac *h;
SECItem keyItem;
SECItem noParams;
keyItem.type = siBuffer;
- keyItem.data = (unsigned char *)buffer;
- keyItem.len = (int)length;
+ keyItem.data = CONST_CAST(unsigned char *)key;
+ keyItem.len = (int)key_length;
noParams.type = siBuffer;
noParams.data = 0;
return -EINVAL;
}
-int crypt_hmac_restart(struct crypt_hmac *ctx)
+static int crypt_hmac_restart(struct crypt_hmac *ctx)
{
if (PK11_DigestBegin(ctx->md) != SECSuccess)
return -EINVAL;
int crypt_hmac_write(struct crypt_hmac *ctx, const char *buffer, size_t length)
{
- if (PK11_DigestOp(ctx->md, (unsigned char *)buffer, length) != SECSuccess)
+ if (PK11_DigestOp(ctx->md, CONST_CAST(unsigned char *)buffer, length) != SECSuccess)
return -EINVAL;
return 0;
unsigned char tmp[64];
unsigned int tmp_len;
- if (length > ctx->hash->length)
+ if (length > (size_t)ctx->hash->length)
return -EINVAL;
if (PK11_DigestFinal(ctx->md, tmp, &tmp_len, length) != SECSuccess)
return -EINVAL;
memcpy(buffer, tmp, length);
- memset(tmp, 0, sizeof(tmp));
+ crypt_backend_memzero(tmp, sizeof(tmp));
if (tmp_len < length)
return -EINVAL;
+ if (crypt_hmac_restart(ctx))
+ return -EINVAL;
+
return 0;
}
-int crypt_hmac_destroy(struct crypt_hmac *ctx)
+void crypt_hmac_destroy(struct crypt_hmac *ctx)
{
if (ctx->key)
PK11_FreeSymKey(ctx->key);
PK11_DestroyContext(ctx->md, PR_TRUE);
memset(ctx, 0, sizeof(*ctx));
free(ctx);
+}
+
+/* RNG */
+int crypt_backend_rng(char *buffer, size_t length, int quality, int fips)
+{
+ if (fips)
+ return -EINVAL;
+
+ if (PK11_GenerateRandom((unsigned char *)buffer, length) != SECSuccess)
+ return -EINVAL;
+
return 0;
}
+
+/* PBKDF */
+int crypt_pbkdf(const char *kdf, const char *hash,
+ const char *password, size_t password_length,
+ const char *salt, size_t salt_length,
+ char *key, size_t key_length,
+ uint32_t iterations, uint32_t memory, uint32_t parallel)
+{
+ struct hash_alg *ha;
+
+ if (!kdf)
+ return -EINVAL;
+
+ if (!strcmp(kdf, "pbkdf2")) {
+ ha = _get_alg(hash);
+ if (!ha)
+ return -EINVAL;
+
+ return pkcs5_pbkdf2(hash, password, password_length, salt, salt_length,
+ iterations, key_length, key, ha->block_length);
+ } else if (!strncmp(kdf, "argon2", 6)) {
+ return argon2(kdf, password, password_length, salt, salt_length,
+ key, key_length, iterations, memory, parallel);
+ }
+
+ return -EINVAL;
+}
+
+/* Block ciphers */
+int crypt_cipher_init(struct crypt_cipher **ctx, const char *name,
+ const char *mode, const void *key, size_t key_length)
+{
+ struct crypt_cipher *h;
+ int r;
+
+ h = malloc(sizeof(*h));
+ if (!h)
+ return -ENOMEM;
+
+ r = crypt_cipher_init_kernel(&h->ck, name, mode, key, key_length);
+ if (r < 0) {
+ free(h);
+ return r;
+ }
+
+ *ctx = h;
+ return 0;
+}
+
+void crypt_cipher_destroy(struct crypt_cipher *ctx)
+{
+ crypt_cipher_destroy_kernel(&ctx->ck);
+ free(ctx);
+}
+
+int crypt_cipher_encrypt(struct crypt_cipher *ctx,
+ const char *in, char *out, size_t length,
+ const char *iv, size_t iv_length)
+{
+ return crypt_cipher_encrypt_kernel(&ctx->ck, in, out, length, iv, iv_length);
+}
+
+int crypt_cipher_decrypt(struct crypt_cipher *ctx,
+ const char *in, char *out, size_t length,
+ const char *iv, size_t iv_length)
+{
+ return crypt_cipher_decrypt_kernel(&ctx->ck, in, out, length, iv, iv_length);
+}
+
+bool crypt_cipher_kernel_only(struct crypt_cipher *ctx)
+{
+ return true;
+}
+
+int crypt_bitlk_decrypt_key(const void *key, size_t key_length,
+ const char *in, char *out, size_t length,
+ const char *iv, size_t iv_length,
+ const char *tag, size_t tag_length)
+{
+ return crypt_bitlk_decrypt_key_kernel(key, key_length, in, out, length,
+ iv, iv_length, tag, tag_length);
+}
projects / platform / upstream / cryptsetup.git / blobdiff