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openssl/crypto/evp/evp_local.h
Matt Caswell d84f5515fa Don't hold a lock when calling a callback in ossl_namemap_doall_names 
We don't want to hold a read lock when calling a user supplied callback.
That callback could do anything so the risk of a deadlock is high.
Instead we collect all the names first inside the read lock, and then
subsequently call the user callback outside the read lock.

Fixes #14225

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14250)
2021-02-25 08:37:22 +10:00

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/*
* Copyright 2000-2020 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
*/
/* EVP_MD_CTX related stuff */
#include <openssl/core_dispatch.h>
#include "internal/refcount.h"
#define EVP_CTRL_RET_UNSUPPORTED -1
struct evp_md_ctx_st {
const EVP_MD *reqdigest; /* The original requested digest */
const EVP_MD *digest;
ENGINE *engine; /* functional reference if 'digest' is
* ENGINE-provided */
unsigned long flags;
void *md_data;
/* Public key context for sign/verify */
EVP_PKEY_CTX *pctx;
/* Update function: usually copied from EVP_MD */
int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
/* Provider ctx */
void *provctx;
EVP_MD *fetched_digest;
} /* EVP_MD_CTX */ ;
struct evp_cipher_ctx_st {
const EVP_CIPHER *cipher;
ENGINE *engine; /* functional reference if 'cipher' is
* ENGINE-provided */
int encrypt; /* encrypt or decrypt */
int buf_len; /* number we have left */
unsigned char oiv[EVP_MAX_IV_LENGTH]; /* original iv */
unsigned char iv[EVP_MAX_IV_LENGTH]; /* working iv */
unsigned char buf[EVP_MAX_BLOCK_LENGTH]; /* saved partial block */
int num; /* used by cfb/ofb/ctr mode */
/* FIXME: Should this even exist? It appears unused */
void *app_data; /* application stuff */
int key_len; /* May change for variable length cipher */
unsigned long flags; /* Various flags */
void *cipher_data; /* per EVP data */
int final_used;
int block_mask;
unsigned char final[EVP_MAX_BLOCK_LENGTH]; /* possible final block */
/* Provider ctx */
void *provctx;
EVP_CIPHER *fetched_cipher;
} /* EVP_CIPHER_CTX */ ;
struct evp_mac_ctx_st {
EVP_MAC *meth; /* Method structure */
void *data; /* Individual method data */
} /* EVP_MAC_CTX */;
struct evp_kdf_ctx_st {
EVP_KDF *meth; /* Method structure */
void *data; /* Algorithm-specific data */
} /* EVP_KDF_CTX */ ;
struct evp_rand_ctx_st {
EVP_RAND *meth; /* Method structure */
void *data; /* Algorithm-specific data */
EVP_RAND_CTX *parent; /* Parent EVP_RAND or NULL if none */
CRYPTO_REF_COUNT refcnt; /* Context reference count */
CRYPTO_RWLOCK *refcnt_lock;
} /* EVP_RAND_CTX */ ;
struct evp_keymgmt_st {
int id; /* libcrypto internal */
int name_id;
OSSL_PROVIDER *prov;
CRYPTO_REF_COUNT refcnt;
CRYPTO_RWLOCK *lock;
/* Constructor(s), destructor, information */
OSSL_FUNC_keymgmt_new_fn *new;
OSSL_FUNC_keymgmt_free_fn *free;
OSSL_FUNC_keymgmt_get_params_fn *get_params;
OSSL_FUNC_keymgmt_gettable_params_fn *gettable_params;
OSSL_FUNC_keymgmt_set_params_fn *set_params;
OSSL_FUNC_keymgmt_settable_params_fn *settable_params;
/* Generation, a complex constructor */
OSSL_FUNC_keymgmt_gen_init_fn *gen_init;
OSSL_FUNC_keymgmt_gen_set_template_fn *gen_set_template;
OSSL_FUNC_keymgmt_gen_set_params_fn *gen_set_params;
OSSL_FUNC_keymgmt_gen_settable_params_fn *gen_settable_params;
OSSL_FUNC_keymgmt_gen_fn *gen;
OSSL_FUNC_keymgmt_gen_cleanup_fn *gen_cleanup;
OSSL_FUNC_keymgmt_load_fn *load;
/* Key object checking */
OSSL_FUNC_keymgmt_query_operation_name_fn *query_operation_name;
OSSL_FUNC_keymgmt_has_fn *has;
OSSL_FUNC_keymgmt_validate_fn *validate;
OSSL_FUNC_keymgmt_match_fn *match;
/* Import and export routines */
OSSL_FUNC_keymgmt_import_fn *import;
OSSL_FUNC_keymgmt_import_types_fn *import_types;
OSSL_FUNC_keymgmt_export_fn *export;
OSSL_FUNC_keymgmt_export_types_fn *export_types;
OSSL_FUNC_keymgmt_copy_fn *copy;
} /* EVP_KEYMGMT */ ;
struct evp_keyexch_st {
int name_id;
OSSL_PROVIDER *prov;
CRYPTO_REF_COUNT refcnt;
CRYPTO_RWLOCK *lock;
OSSL_FUNC_keyexch_newctx_fn *newctx;
OSSL_FUNC_keyexch_init_fn *init;
OSSL_FUNC_keyexch_set_peer_fn *set_peer;
OSSL_FUNC_keyexch_derive_fn *derive;
OSSL_FUNC_keyexch_freectx_fn *freectx;
OSSL_FUNC_keyexch_dupctx_fn *dupctx;
OSSL_FUNC_keyexch_set_ctx_params_fn *set_ctx_params;
OSSL_FUNC_keyexch_settable_ctx_params_fn *settable_ctx_params;
OSSL_FUNC_keyexch_get_ctx_params_fn *get_ctx_params;
OSSL_FUNC_keyexch_gettable_ctx_params_fn *gettable_ctx_params;
} /* EVP_KEYEXCH */;
struct evp_signature_st {
int name_id;
OSSL_PROVIDER *prov;
CRYPTO_REF_COUNT refcnt;
CRYPTO_RWLOCK *lock;
OSSL_FUNC_signature_newctx_fn *newctx;
OSSL_FUNC_signature_sign_init_fn *sign_init;
OSSL_FUNC_signature_sign_fn *sign;
OSSL_FUNC_signature_verify_init_fn *verify_init;
OSSL_FUNC_signature_verify_fn *verify;
OSSL_FUNC_signature_verify_recover_init_fn *verify_recover_init;
OSSL_FUNC_signature_verify_recover_fn *verify_recover;
OSSL_FUNC_signature_digest_sign_init_fn *digest_sign_init;
OSSL_FUNC_signature_digest_sign_update_fn *digest_sign_update;
OSSL_FUNC_signature_digest_sign_final_fn *digest_sign_final;
OSSL_FUNC_signature_digest_sign_fn *digest_sign;
OSSL_FUNC_signature_digest_verify_init_fn *digest_verify_init;
OSSL_FUNC_signature_digest_verify_update_fn *digest_verify_update;
OSSL_FUNC_signature_digest_verify_final_fn *digest_verify_final;
OSSL_FUNC_signature_digest_verify_fn *digest_verify;
OSSL_FUNC_signature_freectx_fn *freectx;
OSSL_FUNC_signature_dupctx_fn *dupctx;
OSSL_FUNC_signature_get_ctx_params_fn *get_ctx_params;
OSSL_FUNC_signature_gettable_ctx_params_fn *gettable_ctx_params;
OSSL_FUNC_signature_set_ctx_params_fn *set_ctx_params;
OSSL_FUNC_signature_settable_ctx_params_fn *settable_ctx_params;
OSSL_FUNC_signature_get_ctx_md_params_fn *get_ctx_md_params;
OSSL_FUNC_signature_gettable_ctx_md_params_fn *gettable_ctx_md_params;
OSSL_FUNC_signature_set_ctx_md_params_fn *set_ctx_md_params;
OSSL_FUNC_signature_settable_ctx_md_params_fn *settable_ctx_md_params;
} /* EVP_SIGNATURE */;
struct evp_asym_cipher_st {
int name_id;
OSSL_PROVIDER *prov;
CRYPTO_REF_COUNT refcnt;
CRYPTO_RWLOCK *lock;
OSSL_FUNC_asym_cipher_newctx_fn *newctx;
OSSL_FUNC_asym_cipher_encrypt_init_fn *encrypt_init;
OSSL_FUNC_asym_cipher_encrypt_fn *encrypt;
OSSL_FUNC_asym_cipher_decrypt_init_fn *decrypt_init;
OSSL_FUNC_asym_cipher_decrypt_fn *decrypt;
OSSL_FUNC_asym_cipher_freectx_fn *freectx;
OSSL_FUNC_asym_cipher_dupctx_fn *dupctx;
OSSL_FUNC_asym_cipher_get_ctx_params_fn *get_ctx_params;
OSSL_FUNC_asym_cipher_gettable_ctx_params_fn *gettable_ctx_params;
OSSL_FUNC_asym_cipher_set_ctx_params_fn *set_ctx_params;
OSSL_FUNC_asym_cipher_settable_ctx_params_fn *settable_ctx_params;
} /* EVP_ASYM_CIPHER */;
struct evp_kem_st {
int name_id;
OSSL_PROVIDER *prov;
CRYPTO_REF_COUNT refcnt;
CRYPTO_RWLOCK *lock;
OSSL_FUNC_kem_newctx_fn *newctx;
OSSL_FUNC_kem_encapsulate_init_fn *encapsulate_init;
OSSL_FUNC_kem_encapsulate_fn *encapsulate;
OSSL_FUNC_kem_decapsulate_init_fn *decapsulate_init;
OSSL_FUNC_kem_decapsulate_fn *decapsulate;
OSSL_FUNC_kem_freectx_fn *freectx;
OSSL_FUNC_kem_dupctx_fn *dupctx;
OSSL_FUNC_kem_get_ctx_params_fn *get_ctx_params;
OSSL_FUNC_kem_gettable_ctx_params_fn *gettable_ctx_params;
OSSL_FUNC_kem_set_ctx_params_fn *set_ctx_params;
OSSL_FUNC_kem_settable_ctx_params_fn *settable_ctx_params;
} /* EVP_KEM */;
int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
int passlen, ASN1_TYPE *param,
const EVP_CIPHER *c, const EVP_MD *md,
int en_de);
struct evp_Encode_Ctx_st {
/* number saved in a partial encode/decode */
int num;
/*
* The length is either the output line length (in input bytes) or the
* shortest input line length that is ok. Once decoding begins, the
* length is adjusted up each time a longer line is decoded
*/
int length;
/* data to encode */
unsigned char enc_data[80];
/* number read on current line */
int line_num;
unsigned int flags;
};
typedef struct evp_pbe_st EVP_PBE_CTL;
DEFINE_STACK_OF(EVP_PBE_CTL)
int is_partially_overlapping(const void *ptr1, const void *ptr2, int len);
#include <openssl/types.h>
#include <openssl/core.h>
void *evp_generic_fetch(OSSL_LIB_CTX *ctx, int operation_id,
const char *name, const char *properties,
void *(*new_method)(int name_id,
const OSSL_DISPATCH *fns,
OSSL_PROVIDER *prov),
int (*up_ref_method)(void *),
void (*free_method)(void *));
void *evp_generic_fetch_by_number(OSSL_LIB_CTX *ctx, int operation_id,
int name_id, const char *properties,
void *(*new_method)(int name_id,
const OSSL_DISPATCH *fns,
OSSL_PROVIDER *prov),
int (*up_ref_method)(void *),
void (*free_method)(void *));
void evp_generic_do_all(OSSL_LIB_CTX *libctx, int operation_id,
void (*user_fn)(void *method, void *arg),
void *user_arg,
void *(*new_method)(int name_id,
const OSSL_DISPATCH *fns,
OSSL_PROVIDER *prov),
void (*free_method)(void *));
/* Internal fetchers for method types that are to be combined with others */
EVP_KEYMGMT *evp_keymgmt_fetch_by_number(OSSL_LIB_CTX *ctx, int name_id,
const char *properties);
/* Internal structure constructors for fetched methods */
EVP_MD *evp_md_new(void);
EVP_CIPHER *evp_cipher_new(void);
int evp_cipher_get_asn1_aead_params(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
evp_cipher_aead_asn1_params *asn1_params);
int evp_cipher_set_asn1_aead_params(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
evp_cipher_aead_asn1_params *asn1_params);
/* Helper functions to avoid duplicating code */
/*
* These methods implement different ways to pass a params array to the
* provider. They will return one of these values:
*
* -2 if the method doesn't come from a provider
* (evp_do_param will return this to the called)
* -1 if the provider doesn't offer the desired function
* (evp_do_param will raise an error and return 0)
* or the return value from the desired function
* (evp_do_param will return it to the caller)
*/
int evp_do_ciph_getparams(const EVP_CIPHER *ciph, OSSL_PARAM params[]);
int evp_do_ciph_ctx_getparams(const EVP_CIPHER *ciph, void *provctx,
OSSL_PARAM params[]);
int evp_do_ciph_ctx_setparams(const EVP_CIPHER *ciph, void *provctx,
OSSL_PARAM params[]);
int evp_do_md_getparams(const EVP_MD *md, OSSL_PARAM params[]);
int evp_do_md_ctx_getparams(const EVP_MD *md, void *provctx,
OSSL_PARAM params[]);
int evp_do_md_ctx_setparams(const EVP_MD *md, void *provctx,
OSSL_PARAM params[]);
OSSL_PARAM *evp_pkey_to_param(EVP_PKEY *pkey, size_t *sz);
#define M_check_autoarg(ctx, arg, arglen, err) \
if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) { \
size_t pksize = (size_t)EVP_PKEY_size(ctx->pkey); \
\
if (pksize == 0) { \
ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY); /*ckerr_ignore*/ \
return 0; \
} \
if (arg == NULL) { \
*arglen = pksize; \
return 1; \
} \
if (*arglen < pksize) { \
ERR_raise(ERR_LIB_EVP, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/ \
return 0; \
} \
}
void evp_pkey_ctx_free_old_ops(EVP_PKEY_CTX *ctx);
/* OSSL_PROVIDER * is only used to get the library context */
const char *evp_first_name(const OSSL_PROVIDER *prov, int name_id);
int evp_is_a(OSSL_PROVIDER *prov, int number,
const char *legacy_name, const char *name);
int evp_names_do_all(OSSL_PROVIDER *prov, int number,
void (*fn)(const char *name, void *data),
void *data);
int evp_cipher_cache_constants(EVP_CIPHER *cipher);
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