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openssl/include/crypto/evp.h
Matthias St. Pierre 7998e7dc07 rand: fix seeding from a weak entropy source 
The 'rand_generate' method is not well suited for being used with
weak entropy sources in the 'get_entropy' callback, because the
caller needs to provide a preallocated buffer without knowing
how much bytes are actually needed to collect the required entropy.

Instead we use the 'rand_get_seed' and 'rand_clear_seed' methods
which were exactly designed for this purpose: it's the callee who
allocates and fills the buffer, and finally cleans it up again.

The 'rand_get_seed' and 'rand_clear_seed' methods are currently
optional for a provided random generator. We could fall back to
using 'rand_generate' if those methods are not implemented.
However, imo it would be better to simply make them an officially
documented requirement for seed sources.

Fixes #22332

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22394)
2023-10-24 11:14:11 +01:00

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/*
* Copyright 2015-2023 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#ifndef OSSL_CRYPTO_EVP_H
# define OSSL_CRYPTO_EVP_H
# pragma once
# include <openssl/evp.h>
# include <openssl/core_dispatch.h>
# include "internal/refcount.h"
# include "crypto/ecx.h"
/*
* Default PKCS5 PBE KDF salt lengths
* In RFC 8018, PBE1 uses 8 bytes (64 bits) for its salt length.
* It also specifies to use at least 8 bytes for PBES2.
* The NIST requirement for PBKDF2 is 128 bits so we use this as the
* default for PBE2 (scrypt and HKDF2)
*/
# define PKCS5_DEFAULT_PBE1_SALT_LEN PKCS5_SALT_LEN
# define PKCS5_DEFAULT_PBE2_SALT_LEN 16
/*
* Don't free up md_ctx->pctx in EVP_MD_CTX_reset, use the reserved flag
* values in evp.h
*/
#define EVP_MD_CTX_FLAG_KEEP_PKEY_CTX 0x0400
#define EVP_MD_CTX_FLAG_FINALISED 0x0800
#define evp_pkey_ctx_is_legacy(ctx) \
((ctx)->keymgmt == NULL)
#define evp_pkey_ctx_is_provided(ctx) \
(!evp_pkey_ctx_is_legacy(ctx))
struct evp_pkey_ctx_st {
/* Actual operation */
int operation;
/*
* Library context, property query, keytype and keymgmt associated with
* this context
*/
OSSL_LIB_CTX *libctx;
char *propquery;
const char *keytype;
/* If |pkey| below is set, this field is always a reference to its keymgmt */
EVP_KEYMGMT *keymgmt;
union {
struct {
void *genctx;
} keymgmt;
struct {
EVP_KEYEXCH *exchange;
/*
* Opaque ctx returned from a providers exchange algorithm
* implementation OSSL_FUNC_keyexch_newctx()
*/
void *algctx;
} kex;
struct {
EVP_SIGNATURE *signature;
/*
* Opaque ctx returned from a providers signature algorithm
* implementation OSSL_FUNC_signature_newctx()
*/
void *algctx;
} sig;
struct {
EVP_ASYM_CIPHER *cipher;
/*
* Opaque ctx returned from a providers asymmetric cipher algorithm
* implementation OSSL_FUNC_asym_cipher_newctx()
*/
void *algctx;
} ciph;
struct {
EVP_KEM *kem;
/*
* Opaque ctx returned from a providers KEM algorithm
* implementation OSSL_FUNC_kem_newctx()
*/
void *algctx;
} encap;
} op;
/*
* Cached parameters. Inits of operations that depend on these should
* call evp_pkey_ctx_use_delayed_data() when the operation has been set
* up properly.
*/
struct {
/* Distinguishing Identifier, ISO/IEC 15946-3, FIPS 196 */
char *dist_id_name; /* The name used with EVP_PKEY_CTX_ctrl_str() */
void *dist_id; /* The distinguishing ID itself */
size_t dist_id_len; /* The length of the distinguishing ID */
/* Indicators of what has been set. Keep them together! */
unsigned int dist_id_set : 1;
} cached_parameters;
/* Application specific data, usually used by the callback */
void *app_data;
/* Keygen callback */
EVP_PKEY_gen_cb *pkey_gencb;
/* implementation specific keygen data */
int *keygen_info;
int keygen_info_count;
/* Legacy fields below */
/* EVP_PKEY identity */
int legacy_keytype;
/* Method associated with this operation */
const EVP_PKEY_METHOD *pmeth;
/* Engine that implements this method or NULL if builtin */
ENGINE *engine;
/* Key: may be NULL */
EVP_PKEY *pkey;
/* Peer key for key agreement, may be NULL */
EVP_PKEY *peerkey;
/* Algorithm specific data */
void *data;
/* Indicator if digest_custom needs to be called */
unsigned int flag_call_digest_custom:1;
/*
* Used to support taking custody of memory in the case of a provider being
* used with the deprecated EVP_PKEY_CTX_set_rsa_keygen_pubexp() API. This
* member should NOT be used for any other purpose and should be removed
* when said deprecated API is excised completely.
*/
BIGNUM *rsa_pubexp;
} /* EVP_PKEY_CTX */ ;
#define EVP_PKEY_FLAG_DYNAMIC 1
struct evp_pkey_method_st {
int pkey_id;
int flags;
int (*init) (EVP_PKEY_CTX *ctx);
int (*copy) (EVP_PKEY_CTX *dst, const EVP_PKEY_CTX *src);
void (*cleanup) (EVP_PKEY_CTX *ctx);
int (*paramgen_init) (EVP_PKEY_CTX *ctx);
int (*paramgen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
int (*keygen_init) (EVP_PKEY_CTX *ctx);
int (*keygen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
int (*sign_init) (EVP_PKEY_CTX *ctx);
int (*sign) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
const unsigned char *tbs, size_t tbslen);
int (*verify_init) (EVP_PKEY_CTX *ctx);
int (*verify) (EVP_PKEY_CTX *ctx,
const unsigned char *sig, size_t siglen,
const unsigned char *tbs, size_t tbslen);
int (*verify_recover_init) (EVP_PKEY_CTX *ctx);
int (*verify_recover) (EVP_PKEY_CTX *ctx,
unsigned char *rout, size_t *routlen,
const unsigned char *sig, size_t siglen);
int (*signctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
int (*signctx) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
EVP_MD_CTX *mctx);
int (*verifyctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
int (*verifyctx) (EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen,
EVP_MD_CTX *mctx);
int (*encrypt_init) (EVP_PKEY_CTX *ctx);
int (*encrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
const unsigned char *in, size_t inlen);
int (*decrypt_init) (EVP_PKEY_CTX *ctx);
int (*decrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
const unsigned char *in, size_t inlen);
int (*derive_init) (EVP_PKEY_CTX *ctx);
int (*derive) (EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
int (*ctrl_str) (EVP_PKEY_CTX *ctx, const char *type, const char *value);
int (*digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
const unsigned char *tbs, size_t tbslen);
int (*digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
size_t siglen, const unsigned char *tbs,
size_t tbslen);
int (*check) (EVP_PKEY *pkey);
int (*public_check) (EVP_PKEY *pkey);
int (*param_check) (EVP_PKEY *pkey);
int (*digest_custom) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
} /* EVP_PKEY_METHOD */ ;
DEFINE_STACK_OF_CONST(EVP_PKEY_METHOD)
void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
const EVP_PKEY_METHOD *ossl_dh_pkey_method(void);
const EVP_PKEY_METHOD *ossl_dhx_pkey_method(void);
const EVP_PKEY_METHOD *ossl_dsa_pkey_method(void);
const EVP_PKEY_METHOD *ossl_ec_pkey_method(void);
const EVP_PKEY_METHOD *ossl_ecx25519_pkey_method(void);
const EVP_PKEY_METHOD *ossl_ecx448_pkey_method(void);
const EVP_PKEY_METHOD *ossl_ed25519_pkey_method(void);
const EVP_PKEY_METHOD *ossl_ed448_pkey_method(void);
const EVP_PKEY_METHOD *ossl_rsa_pkey_method(void);
const EVP_PKEY_METHOD *ossl_rsa_pss_pkey_method(void);
struct evp_mac_st {
OSSL_PROVIDER *prov;
int name_id;
char *type_name;
const char *description;
CRYPTO_REF_COUNT refcnt;
OSSL_FUNC_mac_newctx_fn *newctx;
OSSL_FUNC_mac_dupctx_fn *dupctx;
OSSL_FUNC_mac_freectx_fn *freectx;
OSSL_FUNC_mac_init_fn *init;
OSSL_FUNC_mac_update_fn *update;
OSSL_FUNC_mac_final_fn *final;
OSSL_FUNC_mac_gettable_params_fn *gettable_params;
OSSL_FUNC_mac_gettable_ctx_params_fn *gettable_ctx_params;
OSSL_FUNC_mac_settable_ctx_params_fn *settable_ctx_params;
OSSL_FUNC_mac_get_params_fn *get_params;
OSSL_FUNC_mac_get_ctx_params_fn *get_ctx_params;
OSSL_FUNC_mac_set_ctx_params_fn *set_ctx_params;
};
struct evp_kdf_st {
OSSL_PROVIDER *prov;
int name_id;
char *type_name;
const char *description;
CRYPTO_REF_COUNT refcnt;
OSSL_FUNC_kdf_newctx_fn *newctx;
OSSL_FUNC_kdf_dupctx_fn *dupctx;
OSSL_FUNC_kdf_freectx_fn *freectx;
OSSL_FUNC_kdf_reset_fn *reset;
OSSL_FUNC_kdf_derive_fn *derive;
OSSL_FUNC_kdf_gettable_params_fn *gettable_params;
OSSL_FUNC_kdf_gettable_ctx_params_fn *gettable_ctx_params;
OSSL_FUNC_kdf_settable_ctx_params_fn *settable_ctx_params;
OSSL_FUNC_kdf_get_params_fn *get_params;
OSSL_FUNC_kdf_get_ctx_params_fn *get_ctx_params;
OSSL_FUNC_kdf_set_ctx_params_fn *set_ctx_params;
};
#define EVP_ORIG_DYNAMIC 0
#define EVP_ORIG_GLOBAL 1
#define EVP_ORIG_METH 2
struct evp_md_st {
/* nid */
int type;
/* Legacy structure members */
int pkey_type;
int md_size;
unsigned long flags;
int origin;
int (*init) (EVP_MD_CTX *ctx);
int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
int (*final) (EVP_MD_CTX *ctx, unsigned char *md);
int (*copy) (EVP_MD_CTX *to, const EVP_MD_CTX *from);
int (*cleanup) (EVP_MD_CTX *ctx);
int block_size;
int ctx_size; /* how big does the ctx->md_data need to be */
/* control function */
int (*md_ctrl) (EVP_MD_CTX *ctx, int cmd, int p1, void *p2);
/* New structure members */
/* Above comment to be removed when legacy has gone */
int name_id;
char *type_name;
const char *description;
OSSL_PROVIDER *prov;
CRYPTO_REF_COUNT refcnt;
OSSL_FUNC_digest_newctx_fn *newctx;
OSSL_FUNC_digest_init_fn *dinit;
OSSL_FUNC_digest_update_fn *dupdate;
OSSL_FUNC_digest_final_fn *dfinal;
OSSL_FUNC_digest_digest_fn *digest;
OSSL_FUNC_digest_freectx_fn *freectx;
OSSL_FUNC_digest_dupctx_fn *dupctx;
OSSL_FUNC_digest_get_params_fn *get_params;
OSSL_FUNC_digest_set_ctx_params_fn *set_ctx_params;
OSSL_FUNC_digest_get_ctx_params_fn *get_ctx_params;
OSSL_FUNC_digest_gettable_params_fn *gettable_params;
OSSL_FUNC_digest_settable_ctx_params_fn *settable_ctx_params;
OSSL_FUNC_digest_gettable_ctx_params_fn *gettable_ctx_params;
} /* EVP_MD */ ;
struct evp_cipher_st {
int nid;
int block_size;
/* Default value for variable length ciphers */
int key_len;
int iv_len;
/* Legacy structure members */
/* Various flags */
unsigned long flags;
/* How the EVP_CIPHER was created. */
int origin;
/* init key */
int (*init) (EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc);
/* encrypt/decrypt data */
int (*do_cipher) (EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl);
/* cleanup ctx */
int (*cleanup) (EVP_CIPHER_CTX *);
/* how big ctx->cipher_data needs to be */
int ctx_size;
/* Populate a ASN1_TYPE with parameters */
int (*set_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
/* Get parameters from a ASN1_TYPE */
int (*get_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
/* Miscellaneous operations */
int (*ctrl) (EVP_CIPHER_CTX *, int type, int arg, void *ptr);
/* Application data */
void *app_data;
/* New structure members */
/* Above comment to be removed when legacy has gone */
int name_id;
char *type_name;
const char *description;
OSSL_PROVIDER *prov;
CRYPTO_REF_COUNT refcnt;
OSSL_FUNC_cipher_newctx_fn *newctx;
OSSL_FUNC_cipher_encrypt_init_fn *einit;
OSSL_FUNC_cipher_decrypt_init_fn *dinit;
OSSL_FUNC_cipher_update_fn *cupdate;
OSSL_FUNC_cipher_final_fn *cfinal;
OSSL_FUNC_cipher_cipher_fn *ccipher;
OSSL_FUNC_cipher_freectx_fn *freectx;
OSSL_FUNC_cipher_dupctx_fn *dupctx;
OSSL_FUNC_cipher_get_params_fn *get_params;
OSSL_FUNC_cipher_get_ctx_params_fn *get_ctx_params;
OSSL_FUNC_cipher_set_ctx_params_fn *set_ctx_params;
OSSL_FUNC_cipher_gettable_params_fn *gettable_params;
OSSL_FUNC_cipher_gettable_ctx_params_fn *gettable_ctx_params;
OSSL_FUNC_cipher_settable_ctx_params_fn *settable_ctx_params;
} /* EVP_CIPHER */ ;
/* Macros to code block cipher wrappers */
/* Wrapper functions for each cipher mode */
#define EVP_C_DATA(kstruct, ctx) \
((kstruct *)EVP_CIPHER_CTX_get_cipher_data(ctx))
#define BLOCK_CIPHER_ecb_loop() \
size_t i, bl; \
bl = EVP_CIPHER_CTX_get0_cipher(ctx)->block_size; \
if (inl < bl) return 1;\
inl -= bl; \
for (i=0; i <= inl; i+=bl)
#define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
{\
BLOCK_CIPHER_ecb_loop() \
cprefix##_ecb_encrypt(in + i, out + i, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_is_encrypting(ctx)); \
return 1;\
}
#define EVP_MAXCHUNK ((size_t)1 << 30)
#define BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched) \
static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
{\
while(inl>=EVP_MAXCHUNK) {\
int num = EVP_CIPHER_CTX_get_num(ctx);\
cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, &num); \
EVP_CIPHER_CTX_set_num(ctx, num);\
inl-=EVP_MAXCHUNK;\
in +=EVP_MAXCHUNK;\
out+=EVP_MAXCHUNK;\
}\
if (inl) {\
int num = EVP_CIPHER_CTX_get_num(ctx);\
cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, &num); \
EVP_CIPHER_CTX_set_num(ctx, num);\
}\
return 1;\
}
#define BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
{\
while(inl>=EVP_MAXCHUNK) \
{\
cprefix##_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, EVP_CIPHER_CTX_is_encrypting(ctx));\
inl-=EVP_MAXCHUNK;\
in +=EVP_MAXCHUNK;\
out+=EVP_MAXCHUNK;\
}\
if (inl)\
cprefix##_cbc_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, ctx->iv, EVP_CIPHER_CTX_is_encrypting(ctx));\
return 1;\
}
#define BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
static int cname##_cfb##cbits##_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
{\
size_t chunk = EVP_MAXCHUNK;\
if (cbits == 1) chunk >>= 3;\
if (inl < chunk) chunk = inl;\
while (inl && inl >= chunk)\
{\
int num = EVP_CIPHER_CTX_get_num(ctx);\
cprefix##_cfb##cbits##_encrypt(in, out, (long) \
((cbits == 1) \
&& !EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS) \
? chunk*8 : chunk), \
&EVP_C_DATA(kstruct, ctx)->ksched, ctx->iv,\
&num, EVP_CIPHER_CTX_is_encrypting(ctx));\
EVP_CIPHER_CTX_set_num(ctx, num);\
inl -= chunk;\
in += chunk;\
out += chunk;\
if (inl < chunk) chunk = inl;\
}\
return 1;\
}
#define BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
#define BLOCK_CIPHER_def1(cname, nmode, mode, MODE, kstruct, nid, block_size, \
key_len, iv_len, flags, init_key, cleanup, \
set_asn1, get_asn1, ctrl) \
static const EVP_CIPHER cname##_##mode = { \
nid##_##nmode, block_size, key_len, iv_len, \
flags | EVP_CIPH_##MODE##_MODE, \
EVP_ORIG_GLOBAL, \
init_key, \
cname##_##mode##_cipher, \
cleanup, \
sizeof(kstruct), \
set_asn1, get_asn1,\
ctrl, \
NULL \
}; \
const EVP_CIPHER *EVP_##cname##_##mode(void) { return &cname##_##mode; }
#define BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, \
iv_len, flags, init_key, cleanup, set_asn1, \
get_asn1, ctrl) \
BLOCK_CIPHER_def1(cname, cbc, cbc, CBC, kstruct, nid, block_size, key_len, \
iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
#define BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, \
iv_len, cbits, flags, init_key, cleanup, \
set_asn1, get_asn1, ctrl) \
BLOCK_CIPHER_def1(cname, cfb##cbits, cfb##cbits, CFB, kstruct, nid, 1, \
key_len, iv_len, flags, init_key, cleanup, set_asn1, \
get_asn1, ctrl)
#define BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, \
iv_len, cbits, flags, init_key, cleanup, \
set_asn1, get_asn1, ctrl) \
BLOCK_CIPHER_def1(cname, ofb##cbits, ofb, OFB, kstruct, nid, 1, \
key_len, iv_len, flags, init_key, cleanup, set_asn1, \
get_asn1, ctrl)
#define BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, \
flags, init_key, cleanup, set_asn1, \
get_asn1, ctrl) \
BLOCK_CIPHER_def1(cname, ecb, ecb, ECB, kstruct, nid, block_size, key_len, \
0, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
#define BLOCK_CIPHER_defs(cname, kstruct, \
nid, block_size, key_len, iv_len, cbits, flags, \
init_key, cleanup, set_asn1, get_asn1, ctrl) \
BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
init_key, cleanup, set_asn1, get_asn1, ctrl) \
BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, iv_len, cbits, \
flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, iv_len, cbits, \
flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, flags, \
init_key, cleanup, set_asn1, get_asn1, ctrl)
/*-
#define BLOCK_CIPHER_defs(cname, kstruct, \
nid, block_size, key_len, iv_len, flags,\
init_key, cleanup, set_asn1, get_asn1, ctrl)\
static const EVP_CIPHER cname##_cbc = {\
nid##_cbc, block_size, key_len, iv_len, \
flags | EVP_CIPH_CBC_MODE,\
EVP_ORIG_GLOBAL,\
init_key,\
cname##_cbc_cipher,\
cleanup,\
sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
set_asn1, get_asn1,\
ctrl, \
NULL \
};\
const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
static const EVP_CIPHER cname##_cfb = {\
nid##_cfb64, 1, key_len, iv_len, \
flags | EVP_CIPH_CFB_MODE,\
EVP_ORIG_GLOBAL,\
init_key,\
cname##_cfb_cipher,\
cleanup,\
sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
set_asn1, get_asn1,\
ctrl,\
NULL \
};\
const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
static const EVP_CIPHER cname##_ofb = {\
nid##_ofb64, 1, key_len, iv_len, \
flags | EVP_CIPH_OFB_MODE,\
EVP_ORIG_GLOBAL,\
init_key,\
cname##_ofb_cipher,\
cleanup,\
sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
set_asn1, get_asn1,\
ctrl,\
NULL \
};\
const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
static const EVP_CIPHER cname##_ecb = {\
nid##_ecb, block_size, key_len, iv_len, \
flags | EVP_CIPH_ECB_MODE,\
EVP_ORIG_GLOBAL,\
init_key,\
cname##_ecb_cipher,\
cleanup,\
sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
set_asn1, get_asn1,\
ctrl,\
NULL \
};\
const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
*/
#define IMPLEMENT_BLOCK_CIPHER(cname, ksched, cprefix, kstruct, nid, \
block_size, key_len, iv_len, cbits, \
flags, init_key, \
cleanup, set_asn1, get_asn1, ctrl) \
BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
cbits, flags, init_key, cleanup, set_asn1, \
get_asn1, ctrl)
#define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len,fl) \
BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
(fl)|EVP_CIPH_FLAG_DEFAULT_ASN1, \
cipher##_init_key, NULL, NULL, NULL, NULL)
typedef struct {
unsigned char iv[EVP_MAX_IV_LENGTH];
unsigned int iv_len;
unsigned int tag_len;
} evp_cipher_aead_asn1_params;
int evp_cipher_param_to_asn1_ex(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
evp_cipher_aead_asn1_params *params);
int evp_cipher_asn1_to_param_ex(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
evp_cipher_aead_asn1_params *params);
/*
* To support transparent execution of operation in backends other
* than the "origin" key, we support transparent export/import to
* those providers, and maintain a cache of the imported keydata,
* so we don't need to redo the export/import every time we perform
* the same operation in that same provider.
* This requires that the "origin" backend (whether it's a legacy or a
* provider "origin") implements exports, and that the target provider
* has an EVP_KEYMGMT that implements import.
*/
typedef struct {
EVP_KEYMGMT *keymgmt;
void *keydata;
int selection;
} OP_CACHE_ELEM;
DEFINE_STACK_OF(OP_CACHE_ELEM)
/*
* An EVP_PKEY can have the following states:
*
* untyped & empty:
*
* type == EVP_PKEY_NONE && keymgmt == NULL
*
* typed & empty:
*
* (type != EVP_PKEY_NONE && pkey.ptr == NULL) ## legacy (libcrypto only)
* || (keymgmt != NULL && keydata == NULL) ## provider side
*
* fully assigned:
*
* (type != EVP_PKEY_NONE && pkey.ptr != NULL) ## legacy (libcrypto only)
* || (keymgmt != NULL && keydata != NULL) ## provider side
*
* The easiest way to detect a legacy key is:
*
* keymgmt == NULL && type != EVP_PKEY_NONE
*
* The easiest way to detect a provider side key is:
*
* keymgmt != NULL
*/
#define evp_pkey_is_blank(pk) \
((pk)->type == EVP_PKEY_NONE && (pk)->keymgmt == NULL)
#define evp_pkey_is_typed(pk) \
((pk)->type != EVP_PKEY_NONE || (pk)->keymgmt != NULL)
#ifndef FIPS_MODULE
# define evp_pkey_is_assigned(pk) \
((pk)->pkey.ptr != NULL || (pk)->keydata != NULL)
#else
# define evp_pkey_is_assigned(pk) \
((pk)->keydata != NULL)
#endif
#define evp_pkey_is_legacy(pk) \
((pk)->type != EVP_PKEY_NONE && (pk)->keymgmt == NULL)
#define evp_pkey_is_provided(pk) \
((pk)->keymgmt != NULL)
union legacy_pkey_st {
void *ptr;
struct rsa_st *rsa; /* RSA */
# ifndef OPENSSL_NO_DSA
struct dsa_st *dsa; /* DSA */
# endif
# ifndef OPENSSL_NO_DH
struct dh_st *dh; /* DH */
# endif
# ifndef OPENSSL_NO_EC
struct ec_key_st *ec; /* ECC */
# ifndef OPENSSL_NO_ECX
ECX_KEY *ecx; /* X25519, X448, Ed25519, Ed448 */
# endif
# endif
};
struct evp_pkey_st {
/* == Legacy attributes == */
int type;
int save_type;
# ifndef FIPS_MODULE
/*
* Legacy key "origin" is composed of a pointer to an EVP_PKEY_ASN1_METHOD,
* a pointer to a low level key and possibly a pointer to an engine.
*/
const EVP_PKEY_ASN1_METHOD *ameth;
ENGINE *engine;
ENGINE *pmeth_engine; /* If not NULL public key ENGINE to use */
/* Union to store the reference to an origin legacy key */
union legacy_pkey_st pkey;
/* Union to store the reference to a non-origin legacy key */
union legacy_pkey_st legacy_cache_pkey;
# endif
/* == Common attributes == */
CRYPTO_REF_COUNT references;
CRYPTO_RWLOCK *lock;
#ifndef FIPS_MODULE
STACK_OF(X509_ATTRIBUTE) *attributes; /* [ 0 ] */
int save_parameters;
unsigned int foreign:1; /* the low-level key is using an engine or an app-method */
CRYPTO_EX_DATA ex_data;
#endif
/* == Provider attributes == */
/*
* Provider keydata "origin" is composed of a pointer to an EVP_KEYMGMT
* and a pointer to the provider side key data. This is never used at
* the same time as the legacy key data above.
*/
EVP_KEYMGMT *keymgmt;
void *keydata;
/*
* If any libcrypto code does anything that may modify the keydata
* contents, this dirty counter must be incremented.
*/
size_t dirty_cnt;
/*
* To support transparent execution of operation in backends other
* than the "origin" key, we support transparent export/import to
* those providers, and maintain a cache of the imported keydata,
* so we don't need to redo the export/import every time we perform
* the same operation in that same provider.
*/
STACK_OF(OP_CACHE_ELEM) *operation_cache;
/*
* We keep a copy of that "origin"'s dirty count, so we know if the
* operation cache needs flushing.
*/
size_t dirty_cnt_copy;
/* Cache of key object information */
struct {
int bits;
int security_bits;
int size;
} cache;
} /* EVP_PKEY */ ;
#define EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) \
((ctx)->operation == EVP_PKEY_OP_SIGN \
|| (ctx)->operation == EVP_PKEY_OP_SIGNCTX \
|| (ctx)->operation == EVP_PKEY_OP_VERIFY \
|| (ctx)->operation == EVP_PKEY_OP_VERIFYCTX \
|| (ctx)->operation == EVP_PKEY_OP_VERIFYRECOVER)
#define EVP_PKEY_CTX_IS_DERIVE_OP(ctx) \
((ctx)->operation == EVP_PKEY_OP_DERIVE)
#define EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) \
((ctx)->operation == EVP_PKEY_OP_ENCRYPT \
|| (ctx)->operation == EVP_PKEY_OP_DECRYPT)
#define EVP_PKEY_CTX_IS_GEN_OP(ctx) \
((ctx)->operation == EVP_PKEY_OP_PARAMGEN \
|| (ctx)->operation == EVP_PKEY_OP_KEYGEN)
#define EVP_PKEY_CTX_IS_FROMDATA_OP(ctx) \
((ctx)->operation == EVP_PKEY_OP_FROMDATA)
#define EVP_PKEY_CTX_IS_KEM_OP(ctx) \
((ctx)->operation == EVP_PKEY_OP_ENCAPSULATE \
|| (ctx)->operation == EVP_PKEY_OP_DECAPSULATE)
void openssl_add_all_ciphers_int(void);
void openssl_add_all_digests_int(void);
void evp_cleanup_int(void);
void evp_app_cleanup_int(void);
void *evp_pkey_export_to_provider(EVP_PKEY *pk, OSSL_LIB_CTX *libctx,
EVP_KEYMGMT **keymgmt,
const char *propquery);
#ifndef FIPS_MODULE
int evp_pkey_copy_downgraded(EVP_PKEY **dest, const EVP_PKEY *src);
void *evp_pkey_get_legacy(EVP_PKEY *pk);
void evp_pkey_free_legacy(EVP_PKEY *x);
EVP_PKEY *evp_pkcs82pkey_legacy(const PKCS8_PRIV_KEY_INFO *p8inf,
OSSL_LIB_CTX *libctx, const char *propq);
#endif
/*
* KEYMGMT utility functions
*/
/*
* Key import structure and helper function, to be used as an export callback
*/
struct evp_keymgmt_util_try_import_data_st {
EVP_KEYMGMT *keymgmt;
void *keydata;
int selection;
};
int evp_keymgmt_util_try_import(const OSSL_PARAM params[], void *arg);
int evp_keymgmt_util_assign_pkey(EVP_PKEY *pkey, EVP_KEYMGMT *keymgmt,
void *keydata);
EVP_PKEY *evp_keymgmt_util_make_pkey(EVP_KEYMGMT *keymgmt, void *keydata);
int evp_keymgmt_util_export(const EVP_PKEY *pk, int selection,
OSSL_CALLBACK *export_cb, void *export_cbarg);
void *evp_keymgmt_util_export_to_provider(EVP_PKEY *pk, EVP_KEYMGMT *keymgmt,
int selection);
OP_CACHE_ELEM *evp_keymgmt_util_find_operation_cache(EVP_PKEY *pk,
EVP_KEYMGMT *keymgmt,
int selection);
int evp_keymgmt_util_clear_operation_cache(EVP_PKEY *pk);
int evp_keymgmt_util_cache_keydata(EVP_PKEY *pk, EVP_KEYMGMT *keymgmt,
void *keydata, int selection);
void evp_keymgmt_util_cache_keyinfo(EVP_PKEY *pk);
void *evp_keymgmt_util_fromdata(EVP_PKEY *target, EVP_KEYMGMT *keymgmt,
int selection, const OSSL_PARAM params[]);
int evp_keymgmt_util_has(EVP_PKEY *pk, int selection);
int evp_keymgmt_util_match(EVP_PKEY *pk1, EVP_PKEY *pk2, int selection);
int evp_keymgmt_util_copy(EVP_PKEY *to, EVP_PKEY *from, int selection);
void *evp_keymgmt_util_gen(EVP_PKEY *target, EVP_KEYMGMT *keymgmt,
void *genctx, OSSL_CALLBACK *cb, void *cbarg);
int evp_keymgmt_util_get_deflt_digest_name(EVP_KEYMGMT *keymgmt,
void *keydata,
char *mdname, size_t mdname_sz);
const char *evp_keymgmt_util_query_operation_name(EVP_KEYMGMT *keymgmt,
int op_id);
/*
* KEYMGMT provider interface functions
*/
void *evp_keymgmt_newdata(const EVP_KEYMGMT *keymgmt);
void evp_keymgmt_freedata(const EVP_KEYMGMT *keymgmt, void *keyddata);
int evp_keymgmt_get_params(const EVP_KEYMGMT *keymgmt,
void *keydata, OSSL_PARAM params[]);
int evp_keymgmt_set_params(const EVP_KEYMGMT *keymgmt,
void *keydata, const OSSL_PARAM params[]);
void *evp_keymgmt_gen_init(const EVP_KEYMGMT *keymgmt, int selection,
const OSSL_PARAM params[]);
int evp_keymgmt_gen_set_template(const EVP_KEYMGMT *keymgmt, void *genctx,
void *templ);
int evp_keymgmt_gen_set_params(const EVP_KEYMGMT *keymgmt, void *genctx,
const OSSL_PARAM params[]);
void *evp_keymgmt_gen(const EVP_KEYMGMT *keymgmt, void *genctx,
OSSL_CALLBACK *cb, void *cbarg);
void evp_keymgmt_gen_cleanup(const EVP_KEYMGMT *keymgmt, void *genctx);
int evp_keymgmt_has_load(const EVP_KEYMGMT *keymgmt);
void *evp_keymgmt_load(const EVP_KEYMGMT *keymgmt,
const void *objref, size_t objref_sz);
int evp_keymgmt_has(const EVP_KEYMGMT *keymgmt, void *keyddata, int selection);
int evp_keymgmt_validate(const EVP_KEYMGMT *keymgmt, void *keydata,
int selection, int checktype);
int evp_keymgmt_match(const EVP_KEYMGMT *keymgmt,
const void *keydata1, const void *keydata2,
int selection);
int evp_keymgmt_import(const EVP_KEYMGMT *keymgmt, void *keydata,
int selection, const OSSL_PARAM params[]);
const OSSL_PARAM *evp_keymgmt_import_types(const EVP_KEYMGMT *keymgmt,
int selection);
int evp_keymgmt_export(const EVP_KEYMGMT *keymgmt, void *keydata,
int selection, OSSL_CALLBACK *param_cb, void *cbarg);
const OSSL_PARAM *evp_keymgmt_export_types(const EVP_KEYMGMT *keymgmt,
int selection);
void *evp_keymgmt_dup(const EVP_KEYMGMT *keymgmt,
const void *keydata_from, int selection);
EVP_KEYMGMT *evp_keymgmt_fetch_from_prov(OSSL_PROVIDER *prov,
const char *name,
const char *properties);
/* Pulling defines out of C source files */
# define EVP_RC4_KEY_SIZE 16
# ifndef TLS1_1_VERSION
# define TLS1_1_VERSION 0x0302
# endif
void evp_encode_ctx_set_flags(EVP_ENCODE_CTX *ctx, unsigned int flags);
/* EVP_ENCODE_CTX flags */
/* Don't generate new lines when encoding */
#define EVP_ENCODE_CTX_NO_NEWLINES 1
/* Use the SRP base64 alphabet instead of the standard one */
#define EVP_ENCODE_CTX_USE_SRP_ALPHABET 2
const EVP_CIPHER *evp_get_cipherbyname_ex(OSSL_LIB_CTX *libctx,
const char *name);
const EVP_MD *evp_get_digestbyname_ex(OSSL_LIB_CTX *libctx,
const char *name);
int ossl_pkcs5_pbkdf2_hmac_ex(const char *pass, int passlen,
const unsigned char *salt, int saltlen, int iter,
const EVP_MD *digest, int keylen,
unsigned char *out,
OSSL_LIB_CTX *libctx, const char *propq);
# ifndef FIPS_MODULE
/*
* Internal helpers for stricter EVP_PKEY_CTX_{set,get}_params().
*
* Return 1 on success, 0 or negative for errors.
*
* In particular they return -2 if any of the params is not supported.
*
* They are not available in FIPS_MODULE as they depend on
* - EVP_PKEY_CTX_{get,set}_params()
* - EVP_PKEY_CTX_{gettable,settable}_params()
*
*/
int evp_pkey_ctx_set_params_strict(EVP_PKEY_CTX *ctx, OSSL_PARAM *params);
int evp_pkey_ctx_get_params_strict(EVP_PKEY_CTX *ctx, OSSL_PARAM *params);
EVP_MD_CTX *evp_md_ctx_new_ex(EVP_PKEY *pkey, const ASN1_OCTET_STRING *id,
OSSL_LIB_CTX *libctx, const char *propq);
int evp_pkey_name2type(const char *name);
const char *evp_pkey_type2name(int type);
int evp_pkey_ctx_use_cached_data(EVP_PKEY_CTX *ctx);
# endif /* !defined(FIPS_MODULE) */
int evp_method_store_cache_flush(OSSL_LIB_CTX *libctx);
int evp_method_store_remove_all_provided(const OSSL_PROVIDER *prov);
int evp_default_properties_enable_fips_int(OSSL_LIB_CTX *libctx, int enable,
int loadconfig);
int evp_set_default_properties_int(OSSL_LIB_CTX *libctx, const char *propq,
int loadconfig, int mirrored);
char *evp_get_global_properties_str(OSSL_LIB_CTX *libctx, int loadconfig);
void evp_md_ctx_clear_digest(EVP_MD_CTX *ctx, int force, int keep_digest);
/* just free the algctx if set, returns 0 on inconsistent state of ctx */
int evp_md_ctx_free_algctx(EVP_MD_CTX *ctx);
/* Three possible states: */
# define EVP_PKEY_STATE_UNKNOWN 0
# define EVP_PKEY_STATE_LEGACY 1
# define EVP_PKEY_STATE_PROVIDER 2
int evp_pkey_ctx_state(const EVP_PKEY_CTX *ctx);
/* These two must ONLY be called for provider side operations */
int evp_pkey_ctx_ctrl_to_param(EVP_PKEY_CTX *ctx,
int keytype, int optype,
int cmd, int p1, void *p2);
int evp_pkey_ctx_ctrl_str_to_param(EVP_PKEY_CTX *ctx,
const char *name, const char *value);
/* These two must ONLY be called for legacy operations */
int evp_pkey_ctx_set_params_to_ctrl(EVP_PKEY_CTX *ctx, const OSSL_PARAM *params);
int evp_pkey_ctx_get_params_to_ctrl(EVP_PKEY_CTX *ctx, OSSL_PARAM *params);
/* This must ONLY be called for legacy EVP_PKEYs */
int evp_pkey_get_params_to_ctrl(const EVP_PKEY *pkey, OSSL_PARAM *params);
/* Same as the public get0 functions but are not const */
# ifndef OPENSSL_NO_DEPRECATED_3_0
DH *evp_pkey_get0_DH_int(const EVP_PKEY *pkey);
EC_KEY *evp_pkey_get0_EC_KEY_int(const EVP_PKEY *pkey);
RSA *evp_pkey_get0_RSA_int(const EVP_PKEY *pkey);
# endif
/* Get internal identification number routines */
int evp_asym_cipher_get_number(const EVP_ASYM_CIPHER *cipher);
int evp_cipher_get_number(const EVP_CIPHER *cipher);
int evp_kdf_get_number(const EVP_KDF *kdf);
int evp_kem_get_number(const EVP_KEM *wrap);
int evp_keyexch_get_number(const EVP_KEYEXCH *keyexch);
int evp_keymgmt_get_number(const EVP_KEYMGMT *keymgmt);
int evp_mac_get_number(const EVP_MAC *mac);
int evp_md_get_number(const EVP_MD *md);
int evp_rand_get_number(const EVP_RAND *rand);
int evp_rand_can_seed(EVP_RAND_CTX *ctx);
size_t evp_rand_get_seed(EVP_RAND_CTX *ctx,
unsigned char **buffer,
int entropy, size_t min_len, size_t max_len,
int prediction_resistance,
const unsigned char *adin, size_t adin_len);
void evp_rand_clear_seed(EVP_RAND_CTX *ctx,
unsigned char *buffer, size_t b_len);
int evp_signature_get_number(const EVP_SIGNATURE *signature);
int evp_pkey_decrypt_alloc(EVP_PKEY_CTX *ctx, unsigned char **outp,
size_t *outlenp, size_t expected_outlen,
const unsigned char *in, size_t inlen);
#endif /* OSSL_CRYPTO_EVP_H */
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