/* * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (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 #include "internal/refcount.h" /* * 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 struct evp_pkey_ctx_st { /* 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; /* Actual operation */ int operation; /* Algorithm specific data */ void *data; /* Application specific data */ void *app_data; /* Keygen callback */ EVP_PKEY_gen_cb *pkey_gencb; /* implementation specific keygen data */ int *keygen_info; int keygen_info_count; } /* EVP_PKEY_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 */ } /* EVP_CIPHER_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, 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); extern const EVP_PKEY_METHOD cmac_pkey_meth; extern const EVP_PKEY_METHOD dh_pkey_meth; extern const EVP_PKEY_METHOD dhx_pkey_meth; extern const EVP_PKEY_METHOD dsa_pkey_meth; extern const EVP_PKEY_METHOD ec_pkey_meth; extern const EVP_PKEY_METHOD sm2_pkey_meth; extern const EVP_PKEY_METHOD ecx25519_pkey_meth; extern const EVP_PKEY_METHOD ecx448_pkey_meth; extern const EVP_PKEY_METHOD ed25519_pkey_meth; extern const EVP_PKEY_METHOD ed448_pkey_meth; extern const EVP_PKEY_METHOD hmac_pkey_meth; extern const EVP_PKEY_METHOD rsa_pkey_meth; extern const EVP_PKEY_METHOD rsa_pss_pkey_meth; extern const EVP_PKEY_METHOD scrypt_pkey_meth; extern const EVP_PKEY_METHOD tls1_prf_pkey_meth; extern const EVP_PKEY_METHOD hkdf_pkey_meth; extern const EVP_PKEY_METHOD poly1305_pkey_meth; extern const EVP_PKEY_METHOD siphash_pkey_meth; extern const EVP_PKEY_METHOD eia3_pkey_meth; /* struct evp_kdf_impl_st is defined by the implementation */ typedef struct evp_kdf_impl_st EVP_KDF_IMPL; typedef struct { int type; EVP_KDF_IMPL *(*new) (void); void (*free) (EVP_KDF_IMPL *impl); void (*reset) (EVP_KDF_IMPL *impl); int (*ctrl) (EVP_KDF_IMPL *impl, int cmd, va_list args); int (*ctrl_str) (EVP_KDF_IMPL *impl, const char *type, const char *value); size_t (*size) (EVP_KDF_IMPL *impl); int (*derive) (EVP_KDF_IMPL *impl, unsigned char *key, size_t keylen); } EVP_KDF_METHOD; extern const EVP_KDF_METHOD pbkdf2_kdf_meth; extern const EVP_KDF_METHOD scrypt_kdf_meth; extern const EVP_KDF_METHOD tls1_prf_kdf_meth; extern const EVP_KDF_METHOD hkdf_kdf_meth; extern const EVP_KDF_METHOD sshkdf_kdf_meth; extern const EVP_KDF_METHOD kb_kdf_meth; extern const EVP_KDF_METHOD krb5kdf_kdf_meth; extern const EVP_KDF_METHOD ss_kdf_meth; struct evp_md_st { int type; int pkey_type; int md_size; unsigned long flags; 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); } /* EVP_MD */ ; struct evp_cipher_st { int nid; int block_size; /* Default value for variable length ciphers */ int key_len; int iv_len; /* Various flags */ unsigned long flags; /* 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; } /* 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_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_encrypting(ctx)); \ return 1;\ } #define EVP_MAXCHUNK ((size_t)1<<(sizeof(long)*8-2)) #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_num(ctx);\ cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &num); \ EVP_CIPHER_CTX_set_num(ctx, num);\ inl-=EVP_MAXCHUNK;\ in +=EVP_MAXCHUNK;\ out+=EVP_MAXCHUNK;\ }\ if (inl) {\ int num = EVP_CIPHER_CTX_num(ctx);\ cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &EVP_C_DATA(kstruct,ctx)->ksched, EVP_CIPHER_CTX_iv_noconst(ctx), &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, EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_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, EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_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_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, EVP_CIPHER_CTX_iv_noconst(ctx),\ &num, EVP_CIPHER_CTX_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, \ 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,\ 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,\ 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,\ 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,\ 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) # ifndef OPENSSL_NO_EC #define X25519_KEYLEN 32 #define X448_KEYLEN 56 #define ED448_KEYLEN 57 #define MAX_KEYLEN ED448_KEYLEN typedef struct { unsigned char pubkey[MAX_KEYLEN]; unsigned char *privkey; } ECX_KEY; #endif /* * Type needs to be a bit field Sub-type needs to be for variations on the * method, as in, can it do arbitrary encryption.... */ struct evp_pkey_st { int type; int save_type; CRYPTO_REF_COUNT references; const EVP_PKEY_ASN1_METHOD *ameth; ENGINE *engine; ENGINE *pmeth_engine; /* If not NULL public key ENGINE to use */ union { void *ptr; # ifndef OPENSSL_NO_RSA struct rsa_st *rsa; /* RSA */ # endif # 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 */ ECX_KEY *ecx; /* X25519, X448, Ed25519, Ed448 */ # endif } pkey; int save_parameters; STACK_OF(X509_ATTRIBUTE) *attributes; /* [ 0 ] */ CRYPTO_RWLOCK *lock; } /* EVP_PKEY */ ; 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); /* 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