/*

 * Copyright 2000-2023 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

 */

#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);

    /*

     * Opaque ctx returned from a providers digest algorithm implementation

     * OSSL_FUNC_digest_newctx()

     */

    void *algctx;

    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 */

    int iv_len;                 /* IV length */

    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 */

    /*

     * Opaque ctx returned from a providers cipher algorithm implementation

     * OSSL_FUNC_cipher_newctx()

     */

    void *algctx;

    EVP_CIPHER *fetched_cipher;

} /* EVP_CIPHER_CTX */ ;

struct evp_mac_ctx_st {

    EVP_MAC *meth;               /* Method structure */

    /*

     * Opaque ctx returned from a providers MAC algorithm implementation

     * OSSL_FUNC_mac_newctx()

     */

    void *algctx;

} /* EVP_MAC_CTX */;

struct evp_kdf_ctx_st {

    EVP_KDF *meth;              /* Method structure */

    /*

     * Opaque ctx returned from a providers KDF algorithm implementation

     * OSSL_FUNC_kdf_newctx()

     */

    void *algctx;

} /* EVP_KDF_CTX */ ;

struct evp_rand_ctx_st {

    EVP_RAND *meth;             /* Method structure */

    /*

     * Opaque ctx returned from a providers rand algorithm implementation

     * OSSL_FUNC_rand_newctx()

     */

    void *algctx;

    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;

    char *type_name;

    const char *description;

    OSSL_PROVIDER *prov;

    CRYPTO_REF_COUNT refcnt;

    /* 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_import_types_ex_fn *import_types_ex;

    OSSL_FUNC_keymgmt_export_fn *export;

    OSSL_FUNC_keymgmt_export_types_fn *export_types;

    OSSL_FUNC_keymgmt_export_types_ex_fn *export_types_ex;

    OSSL_FUNC_keymgmt_dup_fn *dup;

} /* EVP_KEYMGMT */ ;

struct evp_keyexch_st {

    int name_id;

    char *type_name;

    const char *description;

    OSSL_PROVIDER *prov;

    CRYPTO_REF_COUNT refcnt;

    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;

    char *type_name;

    const char *description;

    OSSL_PROVIDER *prov;

    CRYPTO_REF_COUNT refcnt;

    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;

    char *type_name;

    const char *description;

    OSSL_PROVIDER *prov;

    CRYPTO_REF_COUNT refcnt;

    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;

    char *type_name;

    const char *description;

    OSSL_PROVIDER *prov;

    CRYPTO_REF_COUNT refcnt;

    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;

    OSSL_FUNC_kem_auth_encapsulate_init_fn *auth_encapsulate_init;

    OSSL_FUNC_kem_auth_decapsulate_init_fn *auth_decapsulate_init;

} /* 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);

int PKCS5_v2_PBKDF2_keyivgen_ex(EVP_CIPHER_CTX *ctx, const char *pass,

                                int passlen, ASN1_TYPE *param,

                                const EVP_CIPHER *c, const EVP_MD *md,

                                int en_de, OSSL_LIB_CTX *libctx, const char *propq);

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 ossl_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_ALGORITHM *algodef,

                                            OSSL_PROVIDER *prov),

                        int (*up_ref_method)(void *),

                        void (*free_method)(void *));

void *evp_generic_fetch_from_prov(OSSL_PROVIDER *prov, int operation_id,

                                  const char *name, const char *properties,

                                  void *(*new_method)(int name_id,

                                                      const OSSL_ALGORITHM *algodef,

                                                      OSSL_PROVIDER *prov),

                                  int (*up_ref_method)(void *),

                                  void (*free_method)(void *));

void evp_generic_do_all_prefetched(OSSL_LIB_CTX *libctx, int operation_id,

                                   void (*user_fn)(void *method, void *arg),

                                   void *user_arg);

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_ALGORITHM *algodef,

                                            OSSL_PROVIDER *prov),

                        int (*up_ref_method)(void *),

                        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);

EVP_SIGNATURE *evp_signature_fetch_from_prov(OSSL_PROVIDER *prov,

                                             const char *name,

                                             const char *properties);

EVP_ASYM_CIPHER *evp_asym_cipher_fetch_from_prov(OSSL_PROVIDER *prov,

                                                 const char *name,

                                                 const char *properties);

EVP_KEYEXCH *evp_keyexch_fetch_from_prov(OSSL_PROVIDER *prov,

                                         const char *name,

                                         const char *properties);

EVP_KEM *evp_kem_fetch_from_prov(OSSL_PROVIDER *prov,

                                 const char *name,

                                 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_get_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);

void evp_cipher_free_int(EVP_CIPHER *md);

void evp_md_free_int(EVP_MD *md);

/* OSSL_PROVIDER * is only used to get the library context */

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);