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grub/include/grub/crypto.h
Gary Lin 0ff5faf8cd libgcrypt: Implement _gcry_get_hw_features() 
Implement _gcry_get_hw_features() and enable hardware feature detection
for x86_64.

Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2025-10-23 19:15:00 +02:00

675 lines
20 KiB
C
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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006
* 2007, 2008, 2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB 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.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
/* Contains elements based on gcrypt-module.h and gcrypt.h.in.
If it's changed please update this file. */
#ifndef GRUB_CRYPTO_HEADER
#define GRUB_CRYPTO_HEADER 1
#include <grub/symbol.h>
#include <grub/types.h>
#include <grub/err.h>
#include <grub/mm.h>
typedef enum
{
GPG_ERR_NO_ERROR,
GPG_ERR_BAD_MPI,
GPG_ERR_BAD_SECKEY,
GPG_ERR_BAD_SIGNATURE,
GPG_ERR_CANCELED,
GPG_ERR_CIPHER_ALGO,
GPG_ERR_CONFLICT,
GPG_ERR_DECRYPT_FAILED,
GPG_ERR_DIGEST_ALGO,
GPG_ERR_GENERAL,
GPG_ERR_INTERNAL,
GPG_ERR_INV_ARG,
GPG_ERR_INV_CIPHER_MODE,
GPG_ERR_INV_FLAG,
GPG_ERR_INV_KEYLEN,
GPG_ERR_INV_OBJ,
GPG_ERR_INV_OP,
GPG_ERR_INV_SEXP,
GPG_ERR_INV_VALUE,
GPG_ERR_MAC_ALGO,
GPG_ERR_MISSING_VALUE,
GPG_ERR_NO_ENCRYPTION_SCHEME,
GPG_ERR_NO_OBJ,
GPG_ERR_NO_PRIME,
GPG_ERR_NO_SIGNATURE_SCHEME,
GPG_ERR_NOT_FOUND,
GPG_ERR_NOT_IMPLEMENTED,
GPG_ERR_NOT_SUPPORTED,
GPG_ERR_PUBKEY_ALGO,
GPG_ERR_SELFTEST_FAILED,
GPG_ERR_TOO_SHORT,
GPG_ERR_UNKNOWN_ALGORITHM,
GPG_ERR_UNSUPPORTED,
GPG_ERR_UNSUPPORTED_ALGORITHM,
GPG_ERR_WEAK_KEY,
GPG_ERR_WRONG_KEY_USAGE,
GPG_ERR_WRONG_PUBKEY_ALGO,
GPG_ERR_OUT_OF_MEMORY,
GPG_ERR_TOO_LARGE,
GPG_ERR_ENOMEM,
GPG_ERR_CHECKSUM,
GPG_ERR_INV_LENGTH,
GPG_ERR_VALUE_NOT_FOUND,
GPG_ERR_ERANGE,
GPG_ERR_INV_DATA,
GPG_ERR_ENCODING_PROBLEM,
GPG_ERR_BUFFER_TOO_SHORT,
GPG_ERR_SYNTAX,
GPG_ERR_SEXP_INV_LEN_SPEC,
GPG_ERR_SEXP_UNMATCHED_DH,
GPG_ERR_SEXP_UNMATCHED_PAREN,
GPG_ERR_SEXP_ZERO_PREFIX,
GPG_ERR_SEXP_NESTED_DH,
GPG_ERR_SEXP_UNEXPECTED_PUNC,
GPG_ERR_SEXP_BAD_CHARACTER,
GPG_ERR_SEXP_NOT_CANONICAL,
GPG_ERR_SEXP_STRING_TOO_LONG,
GPG_ERR_SEXP_BAD_QUOTATION,
GPG_ERR_SEXP_ODD_HEX_NUMBERS,
GPG_ERR_SEXP_BAD_HEX_CHAR,
GPG_ERR_LIMIT_REACHED,
GPG_ERR_EOF,
GPG_ERR_BAD_DATA,
GPG_ERR_EINVAL,
GPG_ERR_INV_STATE,
} gpg_err_code_t;
typedef gpg_err_code_t gpg_error_t;
typedef gpg_error_t gcry_error_t;
typedef gpg_err_code_t gcry_err_code_t;
#define gcry_error_t gcry_err_code_t
#if 0
enum gcry_cipher_modes
{
GCRY_CIPHER_MODE_NONE = 0, /* Not yet specified. */
GCRY_CIPHER_MODE_ECB = 1, /* Electronic codebook. */
GCRY_CIPHER_MODE_CFB = 2, /* Cipher feedback. */
GCRY_CIPHER_MODE_CBC = 3, /* Cipher block chaining. */
GCRY_CIPHER_MODE_STREAM = 4, /* Used with stream ciphers. */
GCRY_CIPHER_MODE_OFB = 5, /* Outer feedback. */
GCRY_CIPHER_MODE_CTR = 6 /* Counter. */
};
#endif
/* Extra algo IDs not coming from gcrypt. */
#define GCRY_MD_ADLER32 10301
#define GCRY_MD_CRC64 10302
/* Don't rely on this. Check! */
#define GRUB_CRYPTO_MAX_MDLEN 64
#define GRUB_CRYPTO_MAX_CIPHER_BLOCKSIZE 16
#define GRUB_CRYPTO_MAX_MD_CONTEXT_SIZE 256
/* Type for the cipher_setkey function. */
struct cipher_bulk_ops;
typedef gcry_err_code_t (*gcry_cipher_setkey_t) (void *c,
const unsigned char *key,
unsigned keylen,
struct cipher_bulk_ops *bulk_ops);
/* Type for the cipher_encrypt function. */
typedef unsigned int (*gcry_cipher_encrypt_t) (void *c,
unsigned char *outbuf,
const unsigned char *inbuf);
/* Type for the cipher_decrypt function. */
typedef unsigned int (*gcry_cipher_decrypt_t) (void *c,
unsigned char *outbuf,
const unsigned char *inbuf);
/* Type for the cipher_stencrypt function. */
typedef void (*gcry_cipher_stencrypt_t) (void *c,
unsigned char *outbuf,
const unsigned char *inbuf,
grub_size_t n);
/* Type for the cipher_stdecrypt function. */
typedef void (*gcry_cipher_stdecrypt_t) (void *c,
unsigned char *outbuf,
const unsigned char *inbuf,
grub_size_t n);
typedef void (*selftest_report_func_t)(const char *domain,
int algo,
const char *what,
const char *errdesc);
/* The type used to convey additional information to a cipher. */
typedef gpg_err_code_t (*gcry_cipher_set_extra_info_t)
(void *c, int what, const void *buffer, grub_size_t buflen);
/* The type used to set an IV directly in the algorithm module. */
typedef void (*gcry_cipher_setiv_func_t)(void *c, const grub_uint8_t *iv, grub_size_t ivlen);
/* Definition of the selftest functions. */
typedef gpg_err_code_t (*gcry_selftest_func_t)
(int algo, int extended, selftest_report_func_t report);
typedef struct gcry_cipher_oid_spec
{
const char *oid;
int mode;
} gcry_cipher_oid_spec_t;
/* Module specification structure for ciphers. */
typedef struct gcry_cipher_spec
{
int algo;
struct {
unsigned int disabled:1;
unsigned int fips:1;
} flags;
const char *name;
const char **aliases;
const gcry_cipher_oid_spec_t *oids;
grub_size_t blocksize;
grub_size_t keylen;
grub_size_t contextsize;
gcry_cipher_setkey_t setkey;
gcry_cipher_encrypt_t encrypt;
gcry_cipher_decrypt_t decrypt;
gcry_cipher_stencrypt_t stencrypt;
gcry_cipher_stdecrypt_t stdecrypt;
gcry_selftest_func_t selftest;
gcry_cipher_set_extra_info_t set_extra_info;
gcry_cipher_setiv_func_t setiv;
#ifdef GRUB_UTIL
const char *modname;
#endif
struct gcry_cipher_spec *next;
} gcry_cipher_spec_t;
/* Type for the md_init function. */
typedef void (*gcry_md_init_t) (void *c, unsigned int flags);
/* Type for the md_write function. */
typedef void (*gcry_md_write_t) (void *c, const void *buf, grub_size_t nbytes);
/* Type for the md_final function. */
typedef void (*gcry_md_final_t) (void *c);
/* Type for the md_read function. */
typedef unsigned char *(*gcry_md_read_t) (void *c);
typedef struct gcry_md_oid_spec
{
const char *oidstring;
} gcry_md_oid_spec_t;
/* Module specification structure for message digests. */
typedef struct gcry_md_spec
{
int algo;
struct {
unsigned int disabled:1;
unsigned int fips:1;
} flags;
const char *name;
const unsigned char *asnoid;
int asnlen;
const gcry_md_oid_spec_t *oids;
grub_size_t mdlen;
gcry_md_init_t init;
gcry_md_write_t write;
gcry_md_final_t final;
gcry_md_read_t read;
void *extract;
void *hash_buffers;
grub_size_t contextsize; /* allocate this amount of context */
/* Block size, needed for HMAC. */
grub_size_t blocksize;
#ifdef GRUB_UTIL
const char *modname;
#endif
struct gcry_md_spec *next;
} gcry_md_spec_t;
/*
* Clang defaults to flagging type redefinitions as warnings.
* A few "forward declarations" in this file are needed due
* to inter-relationship complexities between GRUB and libgcrypt.
*/
#ifdef __clang__
#pragma GCC diagnostic ignored "-Wtypedef-redefinition"
#endif
typedef struct gcry_md_handle*gcry_md_hd_t;
struct gcry_mpi;
typedef struct gcry_mpi *gcry_mpi_t;
struct gcry_sexp;
typedef struct gcry_sexp *gcry_sexp_t;
#define PUBKEY_FLAG_NO_BLINDING (1 << 0)
#define PUBKEY_FLAG_RFC6979 (1 << 1)
#define PUBKEY_FLAG_FIXEDLEN (1 << 2)
#define PUBKEY_FLAG_LEGACYRESULT (1 << 3)
#define PUBKEY_FLAG_RAW_FLAG (1 << 4)
#define PUBKEY_FLAG_TRANSIENT_KEY (1 << 5)
#define PUBKEY_FLAG_USE_X931 (1 << 6)
#define PUBKEY_FLAG_USE_FIPS186 (1 << 7)
#define PUBKEY_FLAG_USE_FIPS186_2 (1 << 8)
#define PUBKEY_FLAG_PARAM (1 << 9)
#define PUBKEY_FLAG_COMP (1 << 10)
#define PUBKEY_FLAG_NOCOMP (1 << 11)
#define PUBKEY_FLAG_EDDSA (1 << 12)
#define PUBKEY_FLAG_GOST (1 << 13)
#define PUBKEY_FLAG_NO_KEYTEST (1 << 14)
#define PUBKEY_FLAG_DJB_TWEAK (1 << 15)
#define PUBKEY_FLAG_SM2 (1 << 16)
#define PUBKEY_FLAG_PREHASH (1 << 17)
enum pk_operation
{
PUBKEY_OP_ENCRYPT,
PUBKEY_OP_DECRYPT,
PUBKEY_OP_SIGN,
PUBKEY_OP_VERIFY
};
enum pk_encoding
{
PUBKEY_ENC_RAW,
PUBKEY_ENC_PKCS1,
PUBKEY_ENC_PKCS1_RAW,
PUBKEY_ENC_OAEP,
PUBKEY_ENC_PSS,
PUBKEY_ENC_UNKNOWN
};
struct pk_encoding_ctx
{
enum pk_operation op;
unsigned int nbits;
enum pk_encoding encoding;
int flags;
int hash_algo;
/* for OAEP */
unsigned char *label;
grub_size_t labellen;
/* for PSS */
grub_size_t saltlen;
int (* verify_cmp) (void *opaque, gcry_mpi_t tmp);
void *verify_arg;
};
/* Type for the pk_generate function. */
typedef gcry_err_code_t (*gcry_pk_generate_t) (gcry_sexp_t genparms,
gcry_sexp_t *r_skey);
/* Type for the pk_check_secret_key function. */
typedef gcry_err_code_t (*gcry_pk_check_secret_key_t) (gcry_sexp_t keyparms);
/* Type for the pk_encrypt function. */
typedef gcry_err_code_t (*gcry_pk_encrypt_t) (gcry_sexp_t *r_ciph,
gcry_sexp_t s_data,
gcry_sexp_t keyparms);
/* Type for the pk_decrypt function. */
typedef gcry_err_code_t (*gcry_pk_decrypt_t) (gcry_sexp_t *r_plain,
gcry_sexp_t s_data,
gcry_sexp_t keyparms);
/* Type for the pk_sign function. */
typedef gcry_err_code_t (*gcry_pk_sign_t) (gcry_sexp_t *r_sig,
gcry_sexp_t s_data,
gcry_sexp_t keyparms);
/* Type for the pk_verify function. */
typedef gcry_err_code_t (*gcry_pk_verify_t) (gcry_sexp_t s_sig,
gcry_sexp_t s_data,
gcry_sexp_t keyparms);
/* Type for the pk_get_nbits function. */
typedef unsigned (*gcry_pk_get_nbits_t) (gcry_sexp_t keyparms);
/* The type used to compute the keygrip. */
typedef gpg_err_code_t (*pk_comp_keygrip_t) (gcry_md_hd_t md,
gcry_sexp_t keyparm);
/* The type used to query an ECC curve name. */
typedef const char *(*pk_get_curve_t)(gcry_sexp_t keyparms, int iterator,
unsigned int *r_nbits);
/* The type used to query ECC curve parameters by name. */
typedef gcry_sexp_t (*pk_get_curve_param_t)(const char *name);
/* Module specification structure for message digests. */
typedef struct gcry_pk_spec
{
int algo;
struct {
unsigned int disabled:1;
unsigned int fips:1;
} flags;
int use;
const char *name;
const char **aliases;
const char *elements_pkey;
const char *elements_skey;
const char *elements_enc;
const char *elements_sig;
const char *elements_grip;
gcry_pk_generate_t generate;
gcry_pk_check_secret_key_t check_secret_key;
gcry_pk_encrypt_t encrypt;
gcry_pk_decrypt_t decrypt;
gcry_pk_sign_t sign;
gcry_pk_verify_t verify;
gcry_pk_get_nbits_t get_nbits;
pk_comp_keygrip_t comp_keygrip;
pk_get_curve_t get_curve;
pk_get_curve_param_t get_curve_param;
#ifdef GRUB_UTIL
const char *modname;
#endif
} gcry_pk_spec_t;
struct grub_crypto_cipher_handle
{
const struct gcry_cipher_spec *cipher;
char ctx[0];
};
typedef struct grub_crypto_cipher_handle *grub_crypto_cipher_handle_t;
struct grub_crypto_hmac_handle;
const gcry_cipher_spec_t *
grub_crypto_lookup_cipher_by_name (const char *name);
grub_crypto_cipher_handle_t
grub_crypto_cipher_open (const struct gcry_cipher_spec *cipher);
gcry_err_code_t
grub_crypto_cipher_set_key (grub_crypto_cipher_handle_t cipher,
const unsigned char *key,
unsigned keylen);
static inline void
grub_crypto_cipher_close (grub_crypto_cipher_handle_t cipher)
{
grub_free (cipher);
}
static inline void
grub_crypto_xor (void *out, const void *in1, const void *in2, grub_size_t size)
{
const grub_uint8_t *in1ptr = in1, *in2ptr = in2;
grub_uint8_t *outptr = out;
while (size && (((grub_addr_t) in1ptr & (sizeof (grub_uint64_t) - 1))
|| ((grub_addr_t) in2ptr & (sizeof (grub_uint64_t) - 1))
|| ((grub_addr_t) outptr & (sizeof (grub_uint64_t) - 1))))
{
*outptr = *in1ptr ^ *in2ptr;
in1ptr++;
in2ptr++;
outptr++;
size--;
}
while (size >= sizeof (grub_uint64_t))
{
/* We've already checked that all pointers are aligned. */
*(grub_uint64_t *) (void *) outptr
= (*(const grub_uint64_t *) (const void *) in1ptr
^ *(const grub_uint64_t *) (const void *) in2ptr);
in1ptr += sizeof (grub_uint64_t);
in2ptr += sizeof (grub_uint64_t);
outptr += sizeof (grub_uint64_t);
size -= sizeof (grub_uint64_t);
}
while (size)
{
*outptr = *in1ptr ^ *in2ptr;
in1ptr++;
in2ptr++;
outptr++;
size--;
}
}
gcry_err_code_t
grub_crypto_ecb_decrypt (grub_crypto_cipher_handle_t cipher,
void *out, const void *in, grub_size_t size);
gcry_err_code_t
grub_crypto_ecb_encrypt (grub_crypto_cipher_handle_t cipher,
void *out, const void *in, grub_size_t size);
gcry_err_code_t
grub_crypto_cbc_encrypt (grub_crypto_cipher_handle_t cipher,
void *out, const void *in, grub_size_t size,
void *iv_in);
gcry_err_code_t
grub_crypto_cbc_decrypt (grub_crypto_cipher_handle_t cipher,
void *out, const void *in, grub_size_t size,
void *iv);
void
grub_cipher_register (gcry_cipher_spec_t *cipher);
void
grub_cipher_unregister (gcry_cipher_spec_t *cipher);
void
grub_md_register (gcry_md_spec_t *digest);
void
grub_md_unregister (gcry_md_spec_t *cipher);
extern struct gcry_pk_spec *grub_crypto_pk_dsa;
extern struct gcry_pk_spec *grub_crypto_pk_ecdsa;
extern struct gcry_pk_spec *grub_crypto_pk_ecdh;
extern struct gcry_pk_spec *grub_crypto_pk_rsa;
void
grub_crypto_hash (const gcry_md_spec_t *hash, void *out, const void *in,
grub_size_t inlen);
const gcry_md_spec_t *
grub_crypto_lookup_md_by_name (const char *name);
const gcry_md_spec_t *
grub_crypto_lookup_md_by_algo (int algo);
const gcry_md_spec_t *
grub_crypto_lookup_md_by_oid (const char *oid);
grub_err_t
grub_crypto_gcry_error (gcry_err_code_t in);
void grub_burn_stack (grub_size_t size);
struct grub_crypto_hmac_handle *
grub_crypto_hmac_init (const struct gcry_md_spec *md,
const void *key, grub_size_t keylen);
void
grub_crypto_hmac_write (struct grub_crypto_hmac_handle *hnd,
const void *data,
grub_size_t datalen);
void
grub_crypto_hmac_fini (struct grub_crypto_hmac_handle *hnd, void *out);
void
grub_crypto_hmac_reset (struct grub_crypto_hmac_handle *hnd);
void
grub_crypto_hmac_final (struct grub_crypto_hmac_handle *hnd, void *out);
void
grub_crypto_hmac_free (struct grub_crypto_hmac_handle *hnd);
gcry_err_code_t
grub_crypto_hmac_buffer (const struct gcry_md_spec *md,
const void *key, grub_size_t keylen,
const void *data, grub_size_t datalen, void *out);
extern gcry_md_spec_t _gcry_digest_spec_md5;
extern gcry_md_spec_t _gcry_digest_spec_sha1;
extern gcry_md_spec_t _gcry_digest_spec_sha256;
extern gcry_md_spec_t _gcry_digest_spec_sha384;
extern gcry_md_spec_t _gcry_digest_spec_sha512;
extern gcry_md_spec_t _gcry_digest_spec_crc32;
extern gcry_md_spec_t _gcry_digest_spec_blake2b_512;
extern gcry_cipher_spec_t _gcry_cipher_spec_aes;
#define GRUB_MD_MD5 ((const gcry_md_spec_t *) &_gcry_digest_spec_md5)
#define GRUB_MD_SHA1 ((const gcry_md_spec_t *) &_gcry_digest_spec_sha1)
#define GRUB_MD_SHA256 ((const gcry_md_spec_t *) &_gcry_digest_spec_sha256)
#define GRUB_MD_SHA512 ((const gcry_md_spec_t *) &_gcry_digest_spec_sha512)
#define GRUB_MD_CRC32 ((const gcry_md_spec_t *) &_gcry_digest_spec_crc32)
#define GRUB_CIPHER_AES ((const gcry_cipher_spec_t *) &_gcry_cipher_spec_aes)
/* Algorithm IDs for the KDFs. */
enum grub_gcry_kdf_algos
{
GRUB_GCRY_KDF_NONE = 0,
GRUB_GCRY_KDF_ARGON2 = 64,
};
enum grub_gcry_kdf_subalgo_argon2
{
GRUB_GCRY_KDF_ARGON2D = 0,
GRUB_GCRY_KDF_ARGON2I = 1,
GRUB_GCRY_KDF_ARGON2ID = 2
};
typedef struct gcry_kdf_handle *gcry_kdf_hd_t;
struct gcry_kdf_handle;
struct gcry_kdf_thread_ops;
gpg_err_code_t
_gcry_kdf_open (gcry_kdf_hd_t *hd, int algo, int subalgo,
const unsigned long *param, unsigned int paramlen,
const void *input, grub_size_t inputlen,
const void *salt, grub_size_t saltlen,
const void *key, grub_size_t keylen,
const void *ad, grub_size_t adlen);
gpg_err_code_t
_gcry_kdf_compute (gcry_kdf_hd_t h, const struct gcry_kdf_thread_ops *ops);
gpg_err_code_t
_gcry_kdf_final (gcry_kdf_hd_t h, grub_size_t resultlen, void *result);
void
_gcry_kdf_close (gcry_kdf_hd_t h);
/* Implement PKCS#5 PBKDF2 as per RFC 2898. The PRF to use is HMAC variant
of digest supplied by MD. Inputs are the password P of length PLEN,
the salt S of length SLEN, the iteration counter C (> 0), and the
desired derived output length DKLEN. Output buffer is DK which
must have room for at least DKLEN octets. The output buffer will
be filled with the derived data. */
gcry_err_code_t
grub_crypto_pbkdf2 (const struct gcry_md_spec *md,
const grub_uint8_t *P, grub_size_t Plen,
const grub_uint8_t *S, grub_size_t Slen,
unsigned int c,
grub_uint8_t *DK, grub_size_t dkLen);
gcry_err_code_t
grub_crypto_argon2 (int subalgo,
const unsigned long *param, unsigned int paramlen,
const void *password, grub_size_t passwordlen,
const void *salt, grub_size_t saltlen,
const void *key, grub_size_t keylen,
const void *ad, grub_size_t adlen,
grub_size_t resultlen, void *result);
int
grub_crypto_memcmp (const void *a, const void *b, grub_size_t n);
int
grub_password_get (char buf[], unsigned buf_size);
/* For indistinguishibility. */
#define GRUB_ACCESS_DENIED grub_error (GRUB_ERR_ACCESS_DENIED, N_("access denied"))
extern void (*grub_crypto_autoload_hook) (const char *name);
void _gcry_assert_failed (const char *expr, const char *file, int line,
const char *func) __attribute__ ((noreturn));
void _gcry_burn_stack (int bytes);
void _gcry_log_error( const char *fmt, ... ) __attribute__ ((format (__printf__, 1, 2)));
void _gcry_log_info (const char *fmt, ...);
void __gcry_burn_stack (unsigned int size);
void __gcry_burn_stack_dummy (void);
void _gcry_bug( const char *file, int line, const char *func );
void
_gcry_fast_wipememory (void *ptr, grub_size_t len);
void
_gcry_fast_wipememory2 (void *ptr, int set, grub_size_t len);
unsigned int
_gcry_ct_memequal (const void *b1, const void *b2, grub_size_t len);
unsigned int
_gcry_ct_not_memequal (const void *b1, const void *b2, grub_size_t len);
#if defined (GRUB_UTIL)
static inline unsigned int _gcry_get_hw_features (void)
{
return 0;
}
#else
extern unsigned int _gcry_get_hw_features (void);
#endif
void *_gcry_malloc(grub_size_t n);
void *_gcry_malloc_secure(grub_size_t n);
void *_gcry_xmalloc(grub_size_t n);
void *_gcry_xmalloc_secure(grub_size_t n);
void _gcry_free (void *p);
void *_gcry_xrealloc (void *a, grub_size_t n);
int _gcry_is_secure (const void *a);
void *_gcry_xcalloc (grub_size_t n, grub_size_t m);
void *_gcry_xcalloc_secure (grub_size_t n, grub_size_t m);
void _gcry_divide_by_zero (void);
#ifdef GRUB_UTIL
void grub_gcry_init_all (void);
void grub_gcry_fini_all (void);
int
grub_get_random (void *out, grub_size_t len);
#define GRUB_UTIL_MODNAME(x) .modname = x,
#else
#define GRUB_UTIL_MODNAME(x)
#endif
#define GRUB_BLAKE2B_BLOCK_SIZE 128
#define GRUB_BLAKE2S_BLOCK_SIZE 64
typedef struct _gpgrt_b64state *gpgrt_b64state_t;
gpgrt_b64state_t gpgrt_b64dec_start (const char *title);
gpg_error_t gpgrt_b64dec_proc (gpgrt_b64state_t state,
void *buffer, grub_size_t length,
grub_size_t *r_nbytes);
gpg_error_t gpgrt_b64dec_finish (gpgrt_b64state_t state);
const char *gpg_strerror (gpg_error_t err);
gcry_err_code_t blake2b_vl_hash (const void *in, grub_size_t inlen,
grub_size_t outputlen, void *output);
#endif
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