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276 lines
8.2 KiB
C
276 lines
8.2 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006
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* 2007, 2008, 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Contains elements based on gcrypt-module.h and gcrypt.h.in.
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If it's changed please update this file. */
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#ifndef GRUB_CRYPTO_HEADER
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#define GRUB_CRYPTO_HEADER 1
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#include <grub/symbol.h>
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#include <grub/types.h>
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#include <grub/err.h>
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typedef enum
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{
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GPG_ERR_NO_ERROR,
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GPG_ERR_BAD_MPI,
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GPG_ERR_BAD_SECKEY,
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GPG_ERR_BAD_SIGNATURE,
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GPG_ERR_CIPHER_ALGO,
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GPG_ERR_CONFLICT,
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GPG_ERR_DECRYPT_FAILED,
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GPG_ERR_DIGEST_ALGO,
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GPG_ERR_GENERAL,
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GPG_ERR_INTERNAL,
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GPG_ERR_INV_ARG,
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GPG_ERR_INV_CIPHER_MODE,
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GPG_ERR_INV_FLAG,
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GPG_ERR_INV_KEYLEN,
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GPG_ERR_INV_OBJ,
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GPG_ERR_INV_OP,
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GPG_ERR_INV_SEXP,
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GPG_ERR_INV_VALUE,
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GPG_ERR_MISSING_VALUE,
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GPG_ERR_NO_ENCRYPTION_SCHEME,
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GPG_ERR_NO_OBJ,
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GPG_ERR_NO_PRIME,
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GPG_ERR_NO_SIGNATURE_SCHEME,
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GPG_ERR_NOT_FOUND,
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GPG_ERR_NOT_IMPLEMENTED,
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GPG_ERR_NOT_SUPPORTED,
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GPG_ERROR_CFLAGS,
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GPG_ERR_PUBKEY_ALGO,
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GPG_ERR_SELFTEST_FAILED,
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GPG_ERR_TOO_SHORT,
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GPG_ERR_UNSUPPORTED,
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GPG_ERR_WEAK_KEY,
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GPG_ERR_WRONG_KEY_USAGE,
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GPG_ERR_WRONG_PUBKEY_ALGO,
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GPG_ERR_OUT_OF_MEMORY
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} gcry_err_code_t;
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#define gpg_err_code_t gcry_err_code_t
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#define gpg_error_t gcry_err_code_t
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enum gcry_cipher_modes
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{
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GCRY_CIPHER_MODE_NONE = 0, /* Not yet specified. */
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GCRY_CIPHER_MODE_ECB = 1, /* Electronic codebook. */
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GCRY_CIPHER_MODE_CFB = 2, /* Cipher feedback. */
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GCRY_CIPHER_MODE_CBC = 3, /* Cipher block chaining. */
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GCRY_CIPHER_MODE_STREAM = 4, /* Used with stream ciphers. */
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GCRY_CIPHER_MODE_OFB = 5, /* Outer feedback. */
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GCRY_CIPHER_MODE_CTR = 6 /* Counter. */
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};
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/* Type for the cipher_setkey function. */
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typedef gcry_err_code_t (*gcry_cipher_setkey_t) (void *c,
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const unsigned char *key,
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unsigned keylen);
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/* Type for the cipher_encrypt function. */
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typedef void (*gcry_cipher_encrypt_t) (void *c,
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unsigned char *outbuf,
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const unsigned char *inbuf);
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/* Type for the cipher_decrypt function. */
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typedef void (*gcry_cipher_decrypt_t) (void *c,
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unsigned char *outbuf,
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const unsigned char *inbuf);
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/* Type for the cipher_stencrypt function. */
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typedef void (*gcry_cipher_stencrypt_t) (void *c,
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unsigned char *outbuf,
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const unsigned char *inbuf,
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unsigned int n);
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/* Type for the cipher_stdecrypt function. */
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typedef void (*gcry_cipher_stdecrypt_t) (void *c,
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unsigned char *outbuf,
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const unsigned char *inbuf,
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unsigned int n);
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typedef struct gcry_cipher_oid_spec
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{
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const char *oid;
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int mode;
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} gcry_cipher_oid_spec_t;
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/* Module specification structure for ciphers. */
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typedef struct gcry_cipher_spec
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{
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const char *name;
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const char **aliases;
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gcry_cipher_oid_spec_t *oids;
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grub_size_t blocksize;
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grub_size_t keylen;
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grub_size_t contextsize;
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gcry_cipher_setkey_t setkey;
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gcry_cipher_encrypt_t encrypt;
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gcry_cipher_decrypt_t decrypt;
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gcry_cipher_stencrypt_t stencrypt;
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gcry_cipher_stdecrypt_t stdecrypt;
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struct gcry_cipher_spec *next;
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} gcry_cipher_spec_t;
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/* Type for the md_init function. */
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typedef void (*gcry_md_init_t) (void *c);
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/* Type for the md_write function. */
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typedef void (*gcry_md_write_t) (void *c, const void *buf, grub_size_t nbytes);
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/* Type for the md_final function. */
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typedef void (*gcry_md_final_t) (void *c);
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/* Type for the md_read function. */
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typedef unsigned char *(*gcry_md_read_t) (void *c);
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typedef struct gcry_md_oid_spec
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{
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const char *oidstring;
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} gcry_md_oid_spec_t;
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/* Module specification structure for message digests. */
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typedef struct gcry_md_spec
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{
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const char *name;
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unsigned char *asnoid;
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int asnlen;
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gcry_md_oid_spec_t *oids;
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grub_size_t mdlen;
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gcry_md_init_t init;
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gcry_md_write_t write;
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gcry_md_final_t final;
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gcry_md_read_t read;
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grub_size_t contextsize; /* allocate this amount of context */
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/* Block size, needed for HMAC. */
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grub_size_t blocksize;
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struct gcry_md_spec *next;
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} gcry_md_spec_t;
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struct grub_crypto_cipher_handle
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{
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const struct gcry_cipher_spec *cipher;
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char ctx[0];
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};
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typedef struct grub_crypto_cipher_handle *grub_crypto_cipher_handle_t;
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struct grub_crypto_hmac_handle;
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const gcry_cipher_spec_t *
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grub_crypto_lookup_cipher_by_name (const char *name);
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grub_crypto_cipher_handle_t
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grub_crypto_cipher_open (const struct gcry_cipher_spec *cipher);
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gcry_err_code_t
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grub_crypto_cipher_set_key (grub_crypto_cipher_handle_t cipher,
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const unsigned char *key,
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unsigned keylen);
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void
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grub_crypto_cipher_close (grub_crypto_cipher_handle_t cipher);
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void
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grub_crypto_xor (void *out, const void *in1, const void *in2, grub_size_t size);
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gcry_err_code_t
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grub_crypto_ecb_decrypt (grub_crypto_cipher_handle_t cipher,
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void *out, void *in, grub_size_t size);
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gcry_err_code_t
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grub_crypto_ecb_encrypt (grub_crypto_cipher_handle_t cipher,
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void *out, void *in, grub_size_t size);
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gcry_err_code_t
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grub_crypto_cbc_encrypt (grub_crypto_cipher_handle_t cipher,
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void *out, void *in, grub_size_t size,
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void *iv_in);
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gcry_err_code_t
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grub_crypto_cbc_decrypt (grub_crypto_cipher_handle_t cipher,
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void *out, void *in, grub_size_t size,
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void *iv);
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void
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grub_cipher_register (gcry_cipher_spec_t *cipher);
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void
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grub_cipher_unregister (gcry_cipher_spec_t *cipher);
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void
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grub_md_register (gcry_md_spec_t *digest);
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void
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grub_md_unregister (gcry_md_spec_t *cipher);
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void
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grub_crypto_hash (const gcry_md_spec_t *hash, void *out, const void *in,
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grub_size_t inlen);
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const gcry_md_spec_t *
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grub_crypto_lookup_md_by_name (const char *name);
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grub_err_t
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grub_crypto_gcry_error (gcry_err_code_t in);
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void grub_burn_stack (grub_size_t size);
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struct grub_crypto_hmac_handle *
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grub_crypto_hmac_init (const struct gcry_md_spec *md,
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const void *key, grub_size_t keylen);
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void
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grub_crypto_hmac_write (struct grub_crypto_hmac_handle *hnd, void *data,
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grub_size_t datalen);
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gcry_err_code_t
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grub_crypto_hmac_fini (struct grub_crypto_hmac_handle *hnd, void *out);
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gcry_err_code_t
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grub_crypto_hmac_buffer (const struct gcry_md_spec *md,
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const void *key, grub_size_t keylen,
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void *data, grub_size_t datalen, void *out);
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extern gcry_md_spec_t _gcry_digest_spec_md5;
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extern gcry_md_spec_t _gcry_digest_spec_sha1;
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extern gcry_md_spec_t _gcry_digest_spec_sha256;
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extern gcry_md_spec_t _gcry_digest_spec_sha512;
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#define GRUB_MD_MD5 ((const gcry_md_spec_t *) &_gcry_digest_spec_md5)
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#define GRUB_MD_SHA1 ((const gcry_md_spec_t *) &_gcry_digest_spec_sha1)
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#define GRUB_MD_SHA256 ((const gcry_md_spec_t *) &_gcry_digest_spec_sha256)
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#define GRUB_MD_SHA512 ((const gcry_md_spec_t *) &_gcry_digest_spec_sha512)
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/* Implement PKCS#5 PBKDF2 as per RFC 2898. The PRF to use is HMAC variant
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of digest supplied by MD. Inputs are the password P of length PLEN,
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the salt S of length SLEN, the iteration counter C (> 0), and the
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desired derived output length DKLEN. Output buffer is DK which
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must have room for at least DKLEN octets. The output buffer will
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be filled with the derived data. */
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gcry_err_code_t
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grub_crypto_pbkdf2 (const struct gcry_md_spec *md,
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const grub_uint8_t *P, grub_size_t Plen,
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const grub_uint8_t *S, grub_size_t Slen,
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unsigned int c,
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grub_uint8_t *DK, grub_size_t dkLen);
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int
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grub_crypto_memcmp (const void *a, const void *b, grub_size_t n);
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int
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grub_password_get (char buf[], unsigned buf_size);
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/* For indistinguishibility. */
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#define GRUB_ACCESS_DENIED grub_error (GRUB_ERR_ACCESS_DENIED, "Access denied.")
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extern void (*grub_crypto_autoload_hook) (const char *name);
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#endif
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