/*
* Linux kernel userspace API crypto backend implementation
*
- * Copyright (C) 2010-2012, Red Hat, Inc. All rights reserved.
- * Copyright (C) 2010-2014, Milan Broz
+ * Copyright (C) 2010-2020 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2010-2020 Milan Broz
*
* This file is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
#include <sys/socket.h>
#include <sys/utsname.h>
#include <linux/if_alg.h>
-#include "crypto_backend.h"
+#include "crypto_backend_internal.h"
/* FIXME: remove later */
#ifndef AF_ALG
#endif
static int crypto_backend_initialised = 0;
-static char version[64];
+static char version[256];
struct hash_alg {
const char *name;
};
static struct hash_alg hash_algs[] = {
- { "sha1", "sha1", 20, 64 },
- { "sha256", "sha256", 32, 64 },
- { "sha512", "sha512", 64, 128 },
- { "ripemd160", "rmd160", 20, 64 },
- { "whirlpool", "wp512", 64, 64 },
- { NULL, NULL, 0, 0 }
+ { "sha1", "sha1", 20, 64 },
+ { "sha224", "sha224", 28, 64 },
+ { "sha256", "sha256", 32, 64 },
+ { "sha384", "sha384", 48, 128 },
+ { "sha512", "sha512", 64, 128 },
+ { "ripemd160", "rmd160", 20, 64 },
+ { "whirlpool", "wp512", 64, 64 },
+ { "sha3-224", "sha3-224", 28, 144 },
+ { "sha3-256", "sha3-256", 32, 136 },
+ { "sha3-384", "sha3-384", 48, 104 },
+ { "sha3-512", "sha3-512", 64, 72 },
+ { "stribog256","streebog256", 32, 64 },
+ { "stribog512","streebog512", 64, 64 },
+ { "sm3", "sm3", 32, 64 },
+ { NULL, NULL, 0, 0 }
};
struct crypt_hash {
int hash_len;
};
-/* Defined in crypt_kernel_ciphers.c */
-extern int crypt_kernel_socket_init(struct sockaddr_alg *sa, int *tfmfd, int *opfd);
+struct crypt_cipher {
+ struct crypt_cipher_kernel ck;
+};
+
+static int crypt_kernel_socket_init(struct sockaddr_alg *sa, int *tfmfd, int *opfd,
+ const void *key, size_t key_length)
+{
+ *tfmfd = socket(AF_ALG, SOCK_SEQPACKET, 0);
+ if (*tfmfd < 0)
+ return -ENOTSUP;
+
+ if (bind(*tfmfd, (struct sockaddr *)sa, sizeof(*sa)) < 0) {
+ close(*tfmfd);
+ *tfmfd = -1;
+ return -ENOENT;
+ }
+
+ if (key && setsockopt(*tfmfd, SOL_ALG, ALG_SET_KEY, key, key_length) < 0) {
+ close(*tfmfd);
+ *tfmfd = -1;
+ return -EINVAL;
+ }
-int crypt_backend_init(struct crypt_device *ctx)
+ *opfd = accept(*tfmfd, NULL, 0);
+ if (*opfd < 0) {
+ close(*tfmfd);
+ *tfmfd = -1;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int crypt_backend_init(void)
{
struct utsname uts;
struct sockaddr_alg sa = {
.salg_family = AF_ALG,
.salg_type = "hash",
- .salg_name = "sha1",
+ .salg_name = "sha256",
};
int tfmfd = -1, opfd = -1;
if (uname(&uts) == -1 || strcmp(uts.sysname, "Linux"))
return -EINVAL;
- if (crypt_kernel_socket_init(&sa, &tfmfd, &opfd) < 0)
+ if (crypt_kernel_socket_init(&sa, &tfmfd, &opfd, NULL, 0) < 0)
return -EINVAL;
close(tfmfd);
return 0;
}
+void crypt_backend_destroy(void)
+{
+ crypto_backend_initialised = 0;
+}
+
uint32_t crypt_backend_flags(void)
{
return CRYPT_BACKEND_KERNEL;
}
h->hash_len = ha->length;
- strncpy((char *)sa.salg_name, ha->kernel_name, sizeof(sa.salg_name));
+ strncpy((char *)sa.salg_name, ha->kernel_name, sizeof(sa.salg_name)-1);
- if (crypt_kernel_socket_init(&sa, &h->tfmfd, &h->opfd) < 0) {
+ if (crypt_kernel_socket_init(&sa, &h->tfmfd, &h->opfd, NULL, 0) < 0) {
free(h);
return -EINVAL;
}
return 0;
}
-int crypt_hash_destroy(struct crypt_hash *ctx)
+void crypt_hash_destroy(struct crypt_hash *ctx)
{
- if (ctx->tfmfd != -1)
+ if (ctx->tfmfd >= 0)
close(ctx->tfmfd);
- if (ctx->opfd != -1)
+ if (ctx->opfd >= 0)
close(ctx->opfd);
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;
struct hash_alg *ha;
snprintf((char *)sa.salg_name, sizeof(sa.salg_name),
"hmac(%s)", ha->kernel_name);
- if (crypt_kernel_socket_init(&sa, &h->tfmfd, &h->opfd) < 0) {
+ if (crypt_kernel_socket_init(&sa, &h->tfmfd, &h->opfd, key, key_length) < 0) {
free(h);
return -EINVAL;
}
- if (setsockopt(h->tfmfd, SOL_ALG, ALG_SET_KEY, buffer, length) == -1) {
- crypt_hmac_destroy(h);
- return -EINVAL;
- }
-
*ctx = h;
return 0;
}
return 0;
}
-int crypt_hmac_destroy(struct crypt_hmac *ctx)
+void crypt_hmac_destroy(struct crypt_hmac *ctx)
{
- if (ctx->tfmfd != -1)
+ if (ctx->tfmfd >= 0)
close(ctx->tfmfd);
- if (ctx->opfd != -1)
+ if (ctx->opfd >= 0)
close(ctx->opfd);
memset(ctx, 0, sizeof(*ctx));
free(ctx);
- return 0;
}
/* RNG - N/A */
const char *password, size_t password_length,
const char *salt, size_t salt_length,
char *key, size_t key_length,
- unsigned int iterations)
+ uint32_t iterations, uint32_t memory, uint32_t parallel)
{
- struct hash_alg *ha = _get_alg(hash);
+ struct hash_alg *ha;
- if (!ha || !kdf || strncmp(kdf, "pbkdf2", 6))
+ if (!kdf)
return -EINVAL;
- return pkcs5_pbkdf2(hash, password, password_length, salt, salt_length,
- iterations, key_length, key, ha->block_length);
+ 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