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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 08:06:26 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 08:06:26 +0000 |
commit | 1660d4b7a65d9ad2ce0deaa19d35579ca4084ac5 (patch) | |
tree | 6cf8220b628ebd2ccfc1375dd6516c6996e9abcc /lib/crypto_backend/crypto_nss.c | |
parent | Initial commit. (diff) | |
download | cryptsetup-upstream.tar.xz cryptsetup-upstream.zip |
Adding upstream version 2:2.6.1.upstream/2%2.6.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lib/crypto_backend/crypto_nss.c | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/lib/crypto_backend/crypto_nss.c b/lib/crypto_backend/crypto_nss.c new file mode 100644 index 0000000..c154812 --- /dev/null +++ b/lib/crypto_backend/crypto_nss.c @@ -0,0 +1,407 @@ +/* + * NSS crypto backend implementation + * + * Copyright (C) 2010-2023 Red Hat, Inc. All rights reserved. + * Copyright (C) 2010-2023 Milan Broz + * + * 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 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 + * Lesser General Public License for more details. + * + * 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 <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, 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 } +}; + +struct crypt_hash { + PK11Context *md; + const struct hash_alg *hash; +}; + +struct crypt_hmac { + PK11Context *md; + PK11SymKey *key; + PK11SlotInfo *slot; + 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; + + while (name && hash_algs[i].name) { + if (!strcmp(name, hash_algs[i].name)) + return &hash_algs[i]; + i++; + } + return NULL; +} + +int crypt_backend_init(bool fips __attribute__((unused))) +{ + int r; + + if (crypto_backend_initialised) + return 0; + + 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) +{ + struct hash_alg *ha = _get_alg(name); + + return ha ? ha->length : -EINVAL; +} + +int crypt_hash_init(struct crypt_hash **ctx, const char *name) +{ + struct crypt_hash *h; + + h = malloc(sizeof(*h)); + if (!h) + return -ENOMEM; + + h->hash = _get_alg(name); + if (!h->hash) { + free(h); + return -EINVAL; + } + + h->md = PK11_CreateDigestContext(h->hash->oid); + if (!h->md) { + free(h); + return -EINVAL; + } + + if (PK11_DigestBegin(h->md) != SECSuccess) { + PK11_DestroyContext(h->md, PR_TRUE); + free(h); + return -EINVAL; + } + + *ctx = h; + return 0; +} + +static int crypt_hash_restart(struct crypt_hash *ctx) +{ + if (PK11_DigestBegin(ctx->md) != SECSuccess) + return -EINVAL; + + return 0; +} + +int crypt_hash_write(struct crypt_hash *ctx, const char *buffer, size_t length) +{ + if (PK11_DigestOp(ctx->md, CONST_CAST(unsigned char *)buffer, length) != SECSuccess) + return -EINVAL; + + return 0; +} + +int crypt_hash_final(struct crypt_hash *ctx, char *buffer, size_t length) +{ + unsigned char tmp[64]; + unsigned int tmp_len; + + 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); + crypt_backend_memzero(tmp, sizeof(tmp)); + + if (tmp_len < length) + return -EINVAL; + + if (crypt_hash_restart(ctx)) + return -EINVAL; + + return 0; +} + +void crypt_hash_destroy(struct crypt_hash *ctx) +{ + PK11_DestroyContext(ctx->md, PR_TRUE); + memset(ctx, 0, sizeof(*ctx)); + free(ctx); +} + +/* HMAC */ +int crypt_hmac_size(const char *name) +{ + return crypt_hash_size(name); +} + +int crypt_hmac_init(struct crypt_hmac **ctx, const char *name, + const void *key, size_t key_length) +{ + struct crypt_hmac *h; + SECItem keyItem; + SECItem noParams; + + keyItem.type = siBuffer; + keyItem.data = CONST_CAST(unsigned char *)key; + keyItem.len = (int)key_length; + + noParams.type = siBuffer; + noParams.data = 0; + noParams.len = 0; + + h = malloc(sizeof(*h)); + if (!h) + return -ENOMEM; + memset(ctx, 0, sizeof(*ctx)); + + + h->hash = _get_alg(name); + if (!h->hash) + goto err; + + h->slot = PK11_GetInternalKeySlot(); + if (!h->slot) + goto err; + + h->key = PK11_ImportSymKey(h->slot, h->hash->ck_type, PK11_OriginUnwrap, + CKA_SIGN, &keyItem, NULL); + if (!h->key) + goto err; + + h->md = PK11_CreateContextBySymKey(h->hash->ck_type, CKA_SIGN, h->key, + &noParams); + if (!h->md) + goto err; + + if (PK11_DigestBegin(h->md) != SECSuccess) + goto err; + + *ctx = h; + return 0; +err: + crypt_hmac_destroy(h); + return -EINVAL; +} + +static int crypt_hmac_restart(struct crypt_hmac *ctx) +{ + if (PK11_DigestBegin(ctx->md) != SECSuccess) + return -EINVAL; + + return 0; +} + +int crypt_hmac_write(struct crypt_hmac *ctx, const char *buffer, size_t length) +{ + if (PK11_DigestOp(ctx->md, CONST_CAST(unsigned char *)buffer, length) != SECSuccess) + return -EINVAL; + + return 0; +} + +int crypt_hmac_final(struct crypt_hmac *ctx, char *buffer, size_t length) +{ + unsigned char tmp[64]; + unsigned int tmp_len; + + 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); + crypt_backend_memzero(tmp, sizeof(tmp)); + + if (tmp_len < length) + return -EINVAL; + + if (crypt_hmac_restart(ctx)) + return -EINVAL; + + return 0; +} + +void crypt_hmac_destroy(struct crypt_hmac *ctx) +{ + if (ctx->key) + PK11_FreeSymKey(ctx->key); + if (ctx->slot) + PK11_FreeSlot(ctx->slot); + if (ctx->md) + 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 __attribute__((unused)), 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 __attribute__((unused))) +{ + 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); +} + +int crypt_backend_memeq(const void *m1, const void *m2, size_t n) +{ + return NSS_SecureMemcmp(m1, m2, n); +} + +bool crypt_fips_mode(void) +{ + return false; +} |