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/*
* Copyright (c) 1997 - 2016 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef HEIMDAL_SMALLER
#define DES3_OLD_ENCTYPE 1
#endif
struct _krb5_key_data {
krb5_keyblock *key;
krb5_data *schedule;
};
struct _krb5_key_usage;
#define CRYPTO_ETYPE(C) ((C)->et->type)
/* bits for `flags' below */
#define F_KEYED 0x0001 /* checksum is keyed */
#define F_CPROOF 0x0002 /* checksum is collision proof */
#define F_DERIVED 0x0004 /* uses derived keys */
#define F_VARIANT 0x0008 /* uses `variant' keys (6.4.3) */
#define F_PSEUDO 0x0010 /* not a real protocol type */
#define F_DISABLED 0x0020 /* enctype/checksum disabled */
#define F_WEAK 0x0040 /* enctype is considered weak */
#define F_OLD 0x0080 /* enctype is old */
#define F_RFC3961_ENC 0x0100 /* RFC3961 simplified profile */
#define F_SPECIAL 0x0200 /* backwards */
#define F_ENC_THEN_CKSUM 0x0400 /* checksum is over encrypted data */
#define F_CRYPTO_MASK 0x0F00
#define F_RFC3961_KDF 0x1000 /* RFC3961 KDF */
#define F_SP800_108_HMAC_KDF 0x2000 /* SP800-108 HMAC KDF */
#define F_KDF_MASK 0xF000
struct salt_type {
krb5_salttype type;
const char *name;
krb5_error_code (*string_to_key)(krb5_context, krb5_enctype, krb5_data,
krb5_salt, krb5_data, krb5_keyblock*);
};
struct _krb5_key_type {
krb5_enctype type;
const char *name;
size_t bits;
size_t size;
size_t schedule_size;
void (*random_key)(krb5_context, krb5_keyblock*);
void (*schedule)(krb5_context, struct _krb5_key_type *, struct _krb5_key_data *);
struct salt_type *string_to_key;
void (*random_to_key)(krb5_context, krb5_keyblock*, const void*, size_t);
void (*cleanup)(krb5_context, struct _krb5_key_data *);
const EVP_CIPHER *(*evp)(void);
};
struct _krb5_checksum_type {
krb5_cksumtype type;
const char *name;
size_t blocksize;
size_t checksumsize;
unsigned flags;
krb5_error_code (*checksum)(krb5_context context,
krb5_crypto crypto,
struct _krb5_key_data *key,
unsigned usage,
const struct krb5_crypto_iov *iov, int niov,
Checksum *csum);
krb5_error_code (*verify)(krb5_context context,
krb5_crypto crypto,
struct _krb5_key_data *key,
unsigned usage,
const struct krb5_crypto_iov *iov, int niov,
Checksum *csum);
};
struct _krb5_encryption_type {
krb5_enctype type;
const char *name;
const char *alias;
size_t blocksize;
size_t padsize;
size_t confoundersize;
struct _krb5_key_type *keytype;
struct _krb5_checksum_type *checksum;
struct _krb5_checksum_type *keyed_checksum;
unsigned flags;
krb5_error_code (*encrypt)(krb5_context context,
struct _krb5_key_data *key,
void *data, size_t len,
krb5_boolean encryptp,
int usage,
void *ivec);
krb5_error_code (*encrypt_iov)(krb5_context context,
struct _krb5_key_data *key,
krb5_crypto_iov *iov, int niov,
krb5_boolean encryptp,
int usage,
void *ivec);
size_t prf_length;
krb5_error_code (*prf)(krb5_context,
krb5_crypto, const krb5_data *, krb5_data *);
};
#define ENCRYPTION_USAGE(U) (((uint32_t)(U) << 8) | 0xAA)
#define INTEGRITY_USAGE(U) (((uint32_t)(U) << 8) | 0x55)
#define CHECKSUM_USAGE(U) (((uint32_t)(U) << 8) | 0x99)
/* Checksums */
extern struct _krb5_checksum_type _krb5_checksum_none;
extern struct _krb5_checksum_type _krb5_checksum_crc32;
extern struct _krb5_checksum_type _krb5_checksum_rsa_md4;
extern struct _krb5_checksum_type _krb5_checksum_rsa_md4_des;
extern struct _krb5_checksum_type _krb5_checksum_rsa_md5_des;
extern struct _krb5_checksum_type _krb5_checksum_rsa_md5_des3;
extern struct _krb5_checksum_type _krb5_checksum_rsa_md5;
extern struct _krb5_checksum_type _krb5_checksum_hmac_sha1_des3;
extern struct _krb5_checksum_type _krb5_checksum_hmac_sha1_aes128;
extern struct _krb5_checksum_type _krb5_checksum_hmac_sha1_aes256;
extern struct _krb5_checksum_type _krb5_checksum_hmac_sha256_128_aes128;
extern struct _krb5_checksum_type _krb5_checksum_hmac_sha384_192_aes256;
extern struct _krb5_checksum_type _krb5_checksum_hmac_md5;
extern struct _krb5_checksum_type _krb5_checksum_sha1;
extern struct _krb5_checksum_type _krb5_checksum_sha256;
extern struct _krb5_checksum_type _krb5_checksum_sha384;
extern struct _krb5_checksum_type _krb5_checksum_sha512;
extern struct _krb5_checksum_type *_krb5_checksum_types[];
extern int _krb5_num_checksums;
/* Salts */
extern struct salt_type _krb5_AES_SHA1_salt[];
extern struct salt_type _krb5_AES_SHA2_salt[];
extern struct salt_type _krb5_arcfour_salt[];
extern struct salt_type _krb5_des_salt[];
extern struct salt_type _krb5_des3_salt[];
extern struct salt_type _krb5_des3_salt_derived[];
/* Encryption types */
extern struct _krb5_encryption_type _krb5_enctype_aes256_cts_hmac_sha1;
extern struct _krb5_encryption_type _krb5_enctype_aes128_cts_hmac_sha1;
extern struct _krb5_encryption_type _krb5_enctype_aes128_cts_hmac_sha256_128;
extern struct _krb5_encryption_type _krb5_enctype_aes256_cts_hmac_sha384_192;
extern struct _krb5_encryption_type _krb5_enctype_des3_cbc_sha1;
extern struct _krb5_encryption_type _krb5_enctype_des3_cbc_md5;
extern struct _krb5_encryption_type _krb5_enctype_des3_cbc_none;
extern struct _krb5_encryption_type _krb5_enctype_arcfour_hmac_md5;
extern struct _krb5_encryption_type _krb5_enctype_des_cbc_md5;
extern struct _krb5_encryption_type _krb5_enctype_old_des3_cbc_sha1;
extern struct _krb5_encryption_type _krb5_enctype_des_cbc_crc;
extern struct _krb5_encryption_type _krb5_enctype_des_cbc_md4;
extern struct _krb5_encryption_type _krb5_enctype_des_cbc_md5;
extern struct _krb5_encryption_type _krb5_enctype_des_cbc_none;
extern struct _krb5_encryption_type _krb5_enctype_des_cfb64_none;
extern struct _krb5_encryption_type _krb5_enctype_des_pcbc_none;
extern struct _krb5_encryption_type _krb5_enctype_null;
extern struct _krb5_encryption_type *_krb5_etypes[];
extern int _krb5_num_etypes;
static inline int
_krb5_crypto_iov_should_sign(const struct krb5_crypto_iov *iov)
{
return (iov->flags == KRB5_CRYPTO_TYPE_DATA
|| iov->flags == KRB5_CRYPTO_TYPE_SIGN_ONLY
|| iov->flags == KRB5_CRYPTO_TYPE_HEADER
|| iov->flags == KRB5_CRYPTO_TYPE_PADDING);
}
/* NO_HCRYPTO_POLLUTION is defined in pkinit-ec.c. See commentary there. */
#ifndef NO_HCRYPTO_POLLUTION
/* Interface to the EVP crypto layer provided by hcrypto */
struct _krb5_evp_schedule {
/*
* Normally we'd say EVP_CIPHER_CTX here, but! this header gets
* included in lib/krb5/pkinit-ec.c
*/
EVP_CIPHER_CTX ectx;
EVP_CIPHER_CTX dctx;
};
struct krb5_crypto_data {
struct _krb5_encryption_type *et;
struct _krb5_key_data key;
EVP_MD_CTX *mdctx;
HMAC_CTX *hmacctx;
int num_key_usage;
struct _krb5_key_usage *key_usage;
krb5_flags flags;
};
/*
* Allow generation and verification of unkeyed checksums even when
* key material is available.
*/
#define KRB5_CRYPTO_FLAG_ALLOW_UNKEYED_CHECKSUM 0x01
#endif
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