/* * Copyright 1995-2023 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 */ /* * DSA low level APIs are deprecated for public use, but still ok for * internal use. */ #include "internal/deprecated.h" #include #include #include "internal/cryptlib.h" #include "internal/refcount.h" #include "internal/namemap.h" #include #include #include #include #include #include #include #include #include #ifndef FIPS_MODULE # include #endif #include #include #include #include #include "internal/numbers.h" /* includes SIZE_MAX */ #include "internal/ffc.h" #include "crypto/evp.h" #include "crypto/dh.h" #include "crypto/dsa.h" #include "crypto/ec.h" #include "crypto/ecx.h" #include "crypto/rsa.h" #ifndef FIPS_MODULE # include "crypto/asn1.h" # include "crypto/x509.h" #endif #include "internal/provider.h" #include "evp_local.h" static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str, int len, EVP_KEYMGMT *keymgmt); static void evp_pkey_free_it(EVP_PKEY *key); #ifndef FIPS_MODULE /* The type of parameters selected in key parameter functions */ # define SELECT_PARAMETERS OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS int EVP_PKEY_get_bits(const EVP_PKEY *pkey) { int size = 0; if (pkey != NULL) { size = pkey->cache.bits; if (pkey->ameth != NULL && pkey->ameth->pkey_bits != NULL) size = pkey->ameth->pkey_bits(pkey); } return size < 0 ? 0 : size; } int EVP_PKEY_get_security_bits(const EVP_PKEY *pkey) { int size = 0; if (pkey != NULL) { size = pkey->cache.security_bits; if (pkey->ameth != NULL && pkey->ameth->pkey_security_bits != NULL) size = pkey->ameth->pkey_security_bits(pkey); } return size < 0 ? 0 : size; } int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode) { # ifndef OPENSSL_NO_DSA if (pkey->type == EVP_PKEY_DSA) { int ret = pkey->save_parameters; if (mode >= 0) pkey->save_parameters = mode; return ret; } # endif # ifndef OPENSSL_NO_EC if (pkey->type == EVP_PKEY_EC) { int ret = pkey->save_parameters; if (mode >= 0) pkey->save_parameters = mode; return ret; } # endif return 0; } int EVP_PKEY_set_ex_data(EVP_PKEY *key, int idx, void *arg) { return CRYPTO_set_ex_data(&key->ex_data, idx, arg); } void *EVP_PKEY_get_ex_data(const EVP_PKEY *key, int idx) { return CRYPTO_get_ex_data(&key->ex_data, idx); } int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) { /* * Clean up legacy stuff from this function when legacy support is gone. */ EVP_PKEY *downgraded_from = NULL; int ok = 0; /* * If |to| is a legacy key and |from| isn't, we must make a downgraded * copy of |from|. If that fails, this function fails. */ if (evp_pkey_is_legacy(to) && evp_pkey_is_provided(from)) { if (!evp_pkey_copy_downgraded(&downgraded_from, from)) goto end; from = downgraded_from; } /* * Make sure |to| is typed. Content is less important at this early * stage. * * 1. If |to| is untyped, assign |from|'s key type to it. * 2. If |to| contains a legacy key, compare its |type| to |from|'s. * (|from| was already downgraded above) * * If |to| is a provided key, there's nothing more to do here, functions * like evp_keymgmt_util_copy() and evp_pkey_export_to_provider() called * further down help us find out if they are the same or not. */ if (evp_pkey_is_blank(to)) { if (evp_pkey_is_legacy(from)) { if (EVP_PKEY_set_type(to, from->type) == 0) goto end; } else { if (EVP_PKEY_set_type_by_keymgmt(to, from->keymgmt) == 0) goto end; } } else if (evp_pkey_is_legacy(to)) { if (to->type != from->type) { ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_KEY_TYPES); goto end; } } if (EVP_PKEY_missing_parameters(from)) { ERR_raise(ERR_LIB_EVP, EVP_R_MISSING_PARAMETERS); goto end; } if (!EVP_PKEY_missing_parameters(to)) { if (EVP_PKEY_parameters_eq(to, from) == 1) ok = 1; else ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_PARAMETERS); goto end; } /* For purely provided keys, we just call the keymgmt utility */ if (to->keymgmt != NULL && from->keymgmt != NULL) { ok = evp_keymgmt_util_copy(to, (EVP_PKEY *)from, SELECT_PARAMETERS); goto end; } /* * If |to| is provided, we know that |from| is legacy at this point. * Try exporting |from| to |to|'s keymgmt, then use evp_keymgmt_dup() * to copy the appropriate data to |to|'s keydata. * We cannot override existing data so do it only if there is no keydata * in |to| yet. */ if (to->keymgmt != NULL && to->keydata == NULL) { EVP_KEYMGMT *to_keymgmt = to->keymgmt; void *from_keydata = evp_pkey_export_to_provider((EVP_PKEY *)from, NULL, &to_keymgmt, NULL); /* * If we get a NULL, it could be an internal error, or it could be * that there's a key mismatch. We're pretending the latter... */ if (from_keydata == NULL) ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_KEY_TYPES); else ok = (to->keydata = evp_keymgmt_dup(to->keymgmt, from_keydata, SELECT_PARAMETERS)) != NULL; goto end; } /* Both keys are legacy */ if (from->ameth != NULL && from->ameth->param_copy != NULL) ok = from->ameth->param_copy(to, from); end: EVP_PKEY_free(downgraded_from); return ok; } int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey) { if (pkey != NULL) { if (pkey->keymgmt != NULL) return !evp_keymgmt_util_has((EVP_PKEY *)pkey, SELECT_PARAMETERS); else if (pkey->ameth != NULL && pkey->ameth->param_missing != NULL) return pkey->ameth->param_missing(pkey); } return 0; } /* * This function is called for any mixture of keys except pure legacy pair. * When legacy keys are gone, we replace a call to this functions with * a call to evp_keymgmt_util_match(). */ static int evp_pkey_cmp_any(const EVP_PKEY *a, const EVP_PKEY *b, int selection) { EVP_KEYMGMT *keymgmt1 = NULL, *keymgmt2 = NULL; void *keydata1 = NULL, *keydata2 = NULL, *tmp_keydata = NULL; /* If none of them are provided, this function shouldn't have been called */ if (!ossl_assert(evp_pkey_is_provided(a) || evp_pkey_is_provided(b))) return -2; /* For purely provided keys, we just call the keymgmt utility */ if (evp_pkey_is_provided(a) && evp_pkey_is_provided(b)) return evp_keymgmt_util_match((EVP_PKEY *)a, (EVP_PKEY *)b, selection); /* * At this point, one of them is provided, the other not. This allows * us to compare types using legacy NIDs. */ if (evp_pkey_is_legacy(a) && !EVP_KEYMGMT_is_a(b->keymgmt, OBJ_nid2sn(a->type))) return -1; /* not the same key type */ if (evp_pkey_is_legacy(b) && !EVP_KEYMGMT_is_a(a->keymgmt, OBJ_nid2sn(b->type))) return -1; /* not the same key type */ /* * We've determined that they both are the same keytype, so the next * step is to do a bit of cross export to ensure we have keydata for * both keys in the same keymgmt. */ keymgmt1 = a->keymgmt; keydata1 = a->keydata; keymgmt2 = b->keymgmt; keydata2 = b->keydata; if (keymgmt2 != NULL && keymgmt2->match != NULL) { tmp_keydata = evp_pkey_export_to_provider((EVP_PKEY *)a, NULL, &keymgmt2, NULL); if (tmp_keydata != NULL) { keymgmt1 = keymgmt2; keydata1 = tmp_keydata; } } if (tmp_keydata == NULL && keymgmt1 != NULL && keymgmt1->match != NULL) { tmp_keydata = evp_pkey_export_to_provider((EVP_PKEY *)b, NULL, &keymgmt1, NULL); if (tmp_keydata != NULL) { keymgmt2 = keymgmt1; keydata2 = tmp_keydata; } } /* If we still don't have matching keymgmt implementations, we give up */ if (keymgmt1 != keymgmt2) return -2; /* If the keymgmt implementations are NULL, the export failed */ if (keymgmt1 == NULL) return -2; return evp_keymgmt_match(keymgmt1, keydata1, keydata2, selection); } # ifndef OPENSSL_NO_DEPRECATED_3_0 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) { return EVP_PKEY_parameters_eq(a, b); } #endif int EVP_PKEY_parameters_eq(const EVP_PKEY *a, const EVP_PKEY *b) { /* * This will just call evp_keymgmt_util_match when legacy support * is gone. */ if (a->keymgmt != NULL || b->keymgmt != NULL) return evp_pkey_cmp_any(a, b, SELECT_PARAMETERS); /* All legacy keys */ if (a->type != b->type) return -1; if (a->ameth != NULL && a->ameth->param_cmp != NULL) return a->ameth->param_cmp(a, b); return -2; } # ifndef OPENSSL_NO_DEPRECATED_3_0 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b) { return EVP_PKEY_eq(a, b); } #endif int EVP_PKEY_eq(const EVP_PKEY *a, const EVP_PKEY *b) { /* * This will just call evp_keymgmt_util_match when legacy support * is gone. */ /* Trivial shortcuts */ if (a == b) return 1; if (a == NULL || b == NULL) return 0; if (a->keymgmt != NULL || b->keymgmt != NULL) { int selection = SELECT_PARAMETERS; if (evp_keymgmt_util_has((EVP_PKEY *)a, OSSL_KEYMGMT_SELECT_PUBLIC_KEY) && evp_keymgmt_util_has((EVP_PKEY *)b, OSSL_KEYMGMT_SELECT_PUBLIC_KEY)) selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY; else selection |= OSSL_KEYMGMT_SELECT_KEYPAIR; return evp_pkey_cmp_any(a, b, selection); } /* All legacy keys */ if (a->type != b->type) return -1; if (a->ameth != NULL) { int ret; /* Compare parameters if the algorithm has them */ if (a->ameth->param_cmp != NULL) { ret = a->ameth->param_cmp(a, b); if (ret <= 0) return ret; } if (a->ameth->pub_cmp != NULL) return a->ameth->pub_cmp(a, b); } return -2; } static EVP_PKEY *new_raw_key_int(OSSL_LIB_CTX *libctx, const char *strtype, const char *propq, int nidtype, ENGINE *e, const unsigned char *key, size_t len, int key_is_priv) { EVP_PKEY *pkey = NULL; EVP_PKEY_CTX *ctx = NULL; const EVP_PKEY_ASN1_METHOD *ameth = NULL; int result = 0; # ifndef OPENSSL_NO_ENGINE /* Check if there is an Engine for this type */ if (e == NULL) { ENGINE *tmpe = NULL; if (strtype != NULL) ameth = EVP_PKEY_asn1_find_str(&tmpe, strtype, -1); else if (nidtype != EVP_PKEY_NONE) ameth = EVP_PKEY_asn1_find(&tmpe, nidtype); /* If tmpe is NULL then no engine is claiming to support this type */ if (tmpe == NULL) ameth = NULL; ENGINE_finish(tmpe); } # endif if (e == NULL && ameth == NULL) { /* * No engine is claiming to support this type, so lets see if we have * a provider. */ ctx = EVP_PKEY_CTX_new_from_name(libctx, strtype != NULL ? strtype : OBJ_nid2sn(nidtype), propq); if (ctx == NULL) goto err; /* May fail if no provider available */ ERR_set_mark(); if (EVP_PKEY_fromdata_init(ctx) == 1) { OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END }; ERR_clear_last_mark(); params[0] = OSSL_PARAM_construct_octet_string( key_is_priv ? OSSL_PKEY_PARAM_PRIV_KEY : OSSL_PKEY_PARAM_PUB_KEY, (void *)key, len); if (EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_KEYPAIR, params) != 1) { ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED); goto err; } EVP_PKEY_CTX_free(ctx); return pkey; } ERR_pop_to_mark(); /* else not supported so fallback to legacy */ } /* Legacy code path */ pkey = EVP_PKEY_new(); if (pkey == NULL) { ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); goto err; } if (!pkey_set_type(pkey, e, nidtype, strtype, -1, NULL)) { /* EVPerr already called */ goto err; } if (!ossl_assert(pkey->ameth != NULL)) goto err; if (key_is_priv) { if (pkey->ameth->set_priv_key == NULL) { ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); goto err; } if (!pkey->ameth->set_priv_key(pkey, key, len)) { ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED); goto err; } } else { if (pkey->ameth->set_pub_key == NULL) { ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); goto err; } if (!pkey->ameth->set_pub_key(pkey, key, len)) { ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED); goto err; } } result = 1; err: if (!result) { EVP_PKEY_free(pkey); pkey = NULL; } EVP_PKEY_CTX_free(ctx); return pkey; } EVP_PKEY *EVP_PKEY_new_raw_private_key_ex(OSSL_LIB_CTX *libctx, const char *keytype, const char *propq, const unsigned char *priv, size_t len) { return new_raw_key_int(libctx, keytype, propq, EVP_PKEY_NONE, NULL, priv, len, 1); } EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *e, const unsigned char *priv, size_t len) { return new_raw_key_int(NULL, NULL, NULL, type, e, priv, len, 1); } EVP_PKEY *EVP_PKEY_new_raw_public_key_ex(OSSL_LIB_CTX *libctx, const char *keytype, const char *propq, const unsigned char *pub, size_t len) { return new_raw_key_int(libctx, keytype, propq, EVP_PKEY_NONE, NULL, pub, len, 0); } EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *e, const unsigned char *pub, size_t len) { return new_raw_key_int(NULL, NULL, NULL, type, e, pub, len, 0); } struct raw_key_details_st { unsigned char **key; size_t *len; int selection; }; static OSSL_CALLBACK get_raw_key_details; static int get_raw_key_details(const OSSL_PARAM params[], void *arg) { const OSSL_PARAM *p = NULL; struct raw_key_details_st *raw_key = arg; if (raw_key->selection == OSSL_KEYMGMT_SELECT_PRIVATE_KEY) { if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY)) != NULL) return OSSL_PARAM_get_octet_string(p, (void **)raw_key->key, raw_key->key == NULL ? 0 : *raw_key->len, raw_key->len); } else if (raw_key->selection == OSSL_KEYMGMT_SELECT_PUBLIC_KEY) { if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY)) != NULL) return OSSL_PARAM_get_octet_string(p, (void **)raw_key->key, raw_key->key == NULL ? 0 : *raw_key->len, raw_key->len); } return 0; } int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, unsigned char *priv, size_t *len) { if (pkey->keymgmt != NULL) { struct raw_key_details_st raw_key; raw_key.key = priv == NULL ? NULL : &priv; raw_key.len = len; raw_key.selection = OSSL_KEYMGMT_SELECT_PRIVATE_KEY; return evp_keymgmt_util_export(pkey, OSSL_KEYMGMT_SELECT_PRIVATE_KEY, get_raw_key_details, &raw_key); } if (pkey->ameth == NULL) { ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); return 0; } if (pkey->ameth->get_priv_key == NULL) { ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); return 0; } if (!pkey->ameth->get_priv_key(pkey, priv, len)) { ERR_raise(ERR_LIB_EVP, EVP_R_GET_RAW_KEY_FAILED); return 0; } return 1; } int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub, size_t *len) { if (pkey->keymgmt != NULL) { struct raw_key_details_st raw_key; raw_key.key = pub == NULL ? NULL : &pub; raw_key.len = len; raw_key.selection = OSSL_KEYMGMT_SELECT_PUBLIC_KEY; return evp_keymgmt_util_export(pkey, OSSL_KEYMGMT_SELECT_PUBLIC_KEY, get_raw_key_details, &raw_key); } if (pkey->ameth == NULL) { ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); return 0; } if (pkey->ameth->get_pub_key == NULL) { ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); return 0; } if (!pkey->ameth->get_pub_key(pkey, pub, len)) { ERR_raise(ERR_LIB_EVP, EVP_R_GET_RAW_KEY_FAILED); return 0; } return 1; } static EVP_PKEY *new_cmac_key_int(const unsigned char *priv, size_t len, const char *cipher_name, const EVP_CIPHER *cipher, OSSL_LIB_CTX *libctx, const char *propq, ENGINE *e) { # ifndef OPENSSL_NO_CMAC # ifndef OPENSSL_NO_ENGINE const char *engine_id = e != NULL ? ENGINE_get_id(e) : NULL; # endif OSSL_PARAM params[5], *p = params; EVP_PKEY *pkey = NULL; EVP_PKEY_CTX *ctx; if (cipher != NULL) cipher_name = EVP_CIPHER_get0_name(cipher); if (cipher_name == NULL) { ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED); return NULL; } ctx = EVP_PKEY_CTX_new_from_name(libctx, "CMAC", propq); if (ctx == NULL) goto err; if (EVP_PKEY_fromdata_init(ctx) <= 0) { ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED); goto err; } *p++ = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, (void *)priv, len); *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_CIPHER, (char *)cipher_name, 0); if (propq != NULL) *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_PROPERTIES, (char *)propq, 0); # ifndef OPENSSL_NO_ENGINE if (engine_id != NULL) *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_ENGINE, (char *)engine_id, 0); # endif *p = OSSL_PARAM_construct_end(); if (EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_KEYPAIR, params) <= 0) { ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED); goto err; } err: EVP_PKEY_CTX_free(ctx); return pkey; # else ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); return NULL; # endif } EVP_PKEY *EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv, size_t len, const EVP_CIPHER *cipher) { return new_cmac_key_int(priv, len, NULL, cipher, NULL, NULL, e); } int EVP_PKEY_set_type(EVP_PKEY *pkey, int type) { return pkey_set_type(pkey, NULL, type, NULL, -1, NULL); } int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len) { return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, str, len, NULL); } # ifndef OPENSSL_NO_ENGINE int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e) { if (e != NULL) { if (!ENGINE_init(e)) { ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB); return 0; } if (ENGINE_get_pkey_meth(e, pkey->type) == NULL) { ENGINE_finish(e); ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_ALGORITHM); return 0; } } ENGINE_finish(pkey->pmeth_engine); pkey->pmeth_engine = e; return 1; } ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey) { return pkey->engine; } # endif # ifndef OPENSSL_NO_DEPRECATED_3_0 static void detect_foreign_key(EVP_PKEY *pkey) { switch (pkey->type) { case EVP_PKEY_RSA: pkey->foreign = pkey->pkey.rsa != NULL && ossl_rsa_is_foreign(pkey->pkey.rsa); break; # ifndef OPENSSL_NO_EC case EVP_PKEY_SM2: case EVP_PKEY_EC: pkey->foreign = pkey->pkey.ec != NULL && ossl_ec_key_is_foreign(pkey->pkey.ec); break; # endif # ifndef OPENSSL_NO_DSA case EVP_PKEY_DSA: pkey->foreign = pkey->pkey.dsa != NULL && ossl_dsa_is_foreign(pkey->pkey.dsa); break; #endif # ifndef OPENSSL_NO_DH case EVP_PKEY_DH: pkey->foreign = pkey->pkey.dh != NULL && ossl_dh_is_foreign(pkey->pkey.dh); break; #endif default: pkey->foreign = 0; break; } } int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key) { # ifndef OPENSSL_NO_EC int pktype; pktype = EVP_PKEY_type(type); if ((key != NULL) && (pktype == EVP_PKEY_EC || pktype == EVP_PKEY_SM2)) { const EC_GROUP *group = EC_KEY_get0_group(key); if (group != NULL) { int curve = EC_GROUP_get_curve_name(group); /* * Regardless of what is requested the SM2 curve must be SM2 type, * and non SM2 curves are EC type. */ if (curve == NID_sm2 && pktype == EVP_PKEY_EC) type = EVP_PKEY_SM2; else if(curve != NID_sm2 && pktype == EVP_PKEY_SM2) type = EVP_PKEY_EC; } } # endif if (pkey == NULL || !EVP_PKEY_set_type(pkey, type)) return 0; pkey->pkey.ptr = key; detect_foreign_key(pkey); return (key != NULL); } # endif void *EVP_PKEY_get0(const EVP_PKEY *pkey) { if (pkey == NULL) return NULL; if (!evp_pkey_is_provided(pkey)) return pkey->pkey.ptr; return NULL; } const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len) { const ASN1_OCTET_STRING *os = NULL; if (pkey->type != EVP_PKEY_HMAC) { ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_AN_HMAC_KEY); return NULL; } os = evp_pkey_get_legacy((EVP_PKEY *)pkey); if (os != NULL) { *len = os->length; return os->data; } return NULL; } # ifndef OPENSSL_NO_POLY1305 const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len) { const ASN1_OCTET_STRING *os = NULL; if (pkey->type != EVP_PKEY_POLY1305) { ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_POLY1305_KEY); return NULL; } os = evp_pkey_get_legacy((EVP_PKEY *)pkey); if (os != NULL) { *len = os->length; return os->data; } return NULL; } # endif # ifndef OPENSSL_NO_SIPHASH const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len) { const ASN1_OCTET_STRING *os = NULL; if (pkey->type != EVP_PKEY_SIPHASH) { ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_SIPHASH_KEY); return NULL; } os = evp_pkey_get_legacy((EVP_PKEY *)pkey); if (os != NULL) { *len = os->length; return os->data; } return NULL; } # endif # ifndef OPENSSL_NO_DSA static DSA *evp_pkey_get0_DSA_int(const EVP_PKEY *pkey) { if (pkey->type != EVP_PKEY_DSA) { ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_DSA_KEY); return NULL; } return evp_pkey_get_legacy((EVP_PKEY *)pkey); } const DSA *EVP_PKEY_get0_DSA(const EVP_PKEY *pkey) { return evp_pkey_get0_DSA_int(pkey); } int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key) { int ret = EVP_PKEY_assign_DSA(pkey, key); if (ret) DSA_up_ref(key); return ret; } DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey) { DSA *ret = evp_pkey_get0_DSA_int(pkey); if (ret != NULL) DSA_up_ref(ret); return ret; } # endif /* OPENSSL_NO_DSA */ # ifndef OPENSSL_NO_EC static const ECX_KEY *evp_pkey_get0_ECX_KEY(const EVP_PKEY *pkey, int type) { if (EVP_PKEY_get_base_id(pkey) != type) { ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_ECX_KEY); return NULL; } return evp_pkey_get_legacy((EVP_PKEY *)pkey); } static ECX_KEY *evp_pkey_get1_ECX_KEY(EVP_PKEY *pkey, int type) { ECX_KEY *ret = (ECX_KEY *)evp_pkey_get0_ECX_KEY(pkey, type); if (ret != NULL && !ossl_ecx_key_up_ref(ret)) ret = NULL; return ret; } # define IMPLEMENT_ECX_VARIANT(NAME) \ ECX_KEY *ossl_evp_pkey_get1_##NAME(EVP_PKEY *pkey) \ { \ return evp_pkey_get1_ECX_KEY(pkey, EVP_PKEY_##NAME); \ } IMPLEMENT_ECX_VARIANT(X25519) IMPLEMENT_ECX_VARIANT(X448) IMPLEMENT_ECX_VARIANT(ED25519) IMPLEMENT_ECX_VARIANT(ED448) # endif # if !defined(OPENSSL_NO_DH) && !defined(OPENSSL_NO_DEPRECATED_3_0) int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *dhkey) { int ret, type; /* * ossl_dh_is_named_safe_prime_group() returns 1 for named safe prime groups * related to ffdhe and modp (which cache q = (p - 1) / 2), * and returns 0 for all other dh parameter generation types including * RFC5114 named groups. * * The EVP_PKEY_DH type is used for dh parameter generation types: * - named safe prime groups related to ffdhe and modp * - safe prime generator * * The type EVP_PKEY_DHX is used for dh parameter generation types * - fips186-4 and fips186-2 * - rfc5114 named groups. * * The EVP_PKEY_DH type is used to save PKCS#3 data than can be stored * without a q value. * The EVP_PKEY_DHX type is used to save X9.42 data that requires the * q value to be stored. */ if (ossl_dh_is_named_safe_prime_group(dhkey)) type = EVP_PKEY_DH; else type = DH_get0_q(dhkey) == NULL ? EVP_PKEY_DH : EVP_PKEY_DHX; ret = EVP_PKEY_assign(pkey, type, dhkey); if (ret) DH_up_ref(dhkey); return ret; } DH *evp_pkey_get0_DH_int(const EVP_PKEY *pkey) { if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) { ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_DH_KEY); return NULL; } return evp_pkey_get_legacy((EVP_PKEY *)pkey); } const DH *EVP_PKEY_get0_DH(const EVP_PKEY *pkey) { return evp_pkey_get0_DH_int(pkey); } DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey) { DH *ret = evp_pkey_get0_DH_int(pkey); if (ret != NULL) DH_up_ref(ret); return ret; } # endif int EVP_PKEY_type(int type) { int ret; const EVP_PKEY_ASN1_METHOD *ameth; ENGINE *e; ameth = EVP_PKEY_asn1_find(&e, type); if (ameth) ret = ameth->pkey_id; else ret = NID_undef; # ifndef OPENSSL_NO_ENGINE ENGINE_finish(e); # endif return ret; } int EVP_PKEY_get_id(const EVP_PKEY *pkey) { return pkey->type; } int EVP_PKEY_get_base_id(const EVP_PKEY *pkey) { return EVP_PKEY_type(pkey->type); } /* * These hard coded cases are pure hackery to get around the fact * that names in crypto/objects/objects.txt are a mess. There is * no "EC", and "RSA" leads to the NID for 2.5.8.1.1, an OID that's * fallen out in favor of { pkcs-1 1 }, i.e. 1.2.840.113549.1.1.1, * the NID of which is used for EVP_PKEY_RSA. Strangely enough, * "DSA" is accurate... but still, better be safe and hard-code * names that we know. * On a similar topic, EVP_PKEY_type(EVP_PKEY_SM2) will result in * EVP_PKEY_EC, because of aliasing. * This should be cleaned away along with all other #legacy support. */ static const OSSL_ITEM standard_name2type[] = { { EVP_PKEY_RSA, "RSA" }, { EVP_PKEY_RSA_PSS, "RSA-PSS" }, { EVP_PKEY_EC, "EC" }, { EVP_PKEY_ED25519, "ED25519" }, { EVP_PKEY_ED448, "ED448" }, { EVP_PKEY_X25519, "X25519" }, { EVP_PKEY_X448, "X448" }, { EVP_PKEY_SM2, "SM2" }, { EVP_PKEY_DH, "DH" }, { EVP_PKEY_DHX, "X9.42 DH" }, { EVP_PKEY_DHX, "DHX" }, { EVP_PKEY_DSA, "DSA" }, }; int evp_pkey_name2type(const char *name) { int type; size_t i; for (i = 0; i < OSSL_NELEM(standard_name2type); i++) { if (OPENSSL_strcasecmp(name, standard_name2type[i].ptr) == 0) return (int)standard_name2type[i].id; } if ((type = EVP_PKEY_type(OBJ_sn2nid(name))) != NID_undef) return type; return EVP_PKEY_type(OBJ_ln2nid(name)); } const char *evp_pkey_type2name(int type) { size_t i; for (i = 0; i < OSSL_NELEM(standard_name2type); i++) { if (type == (int)standard_name2type[i].id) return standard_name2type[i].ptr; } return OBJ_nid2sn(type); } int EVP_PKEY_is_a(const EVP_PKEY *pkey, const char *name) { if (pkey == NULL) return 0; if (pkey->keymgmt == NULL) return pkey->type == evp_pkey_name2type(name); return EVP_KEYMGMT_is_a(pkey->keymgmt, name); } int EVP_PKEY_type_names_do_all(const EVP_PKEY *pkey, void (*fn)(const char *name, void *data), void *data) { if (!evp_pkey_is_typed(pkey)) return 0; if (!evp_pkey_is_provided(pkey)) { const char *name = OBJ_nid2sn(EVP_PKEY_get_id(pkey)); fn(name, data); return 1; } return EVP_KEYMGMT_names_do_all(pkey->keymgmt, fn, data); } int EVP_PKEY_can_sign(const EVP_PKEY *pkey) { if (pkey->keymgmt == NULL) { switch (EVP_PKEY_get_base_id(pkey)) { case EVP_PKEY_RSA: return 1; # ifndef OPENSSL_NO_DSA case EVP_PKEY_DSA: return 1; # endif # ifndef OPENSSL_NO_EC case EVP_PKEY_ED25519: case EVP_PKEY_ED448: return 1; case EVP_PKEY_EC: /* Including SM2 */ return EC_KEY_can_sign(pkey->pkey.ec); # endif default: break; } } else { const OSSL_PROVIDER *prov = EVP_KEYMGMT_get0_provider(pkey->keymgmt); OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov); const char *supported_sig = pkey->keymgmt->query_operation_name != NULL ? pkey->keymgmt->query_operation_name(OSSL_OP_SIGNATURE) : EVP_KEYMGMT_get0_name(pkey->keymgmt); EVP_SIGNATURE *signature = NULL; signature = EVP_SIGNATURE_fetch(libctx, supported_sig, NULL); if (signature != NULL) { EVP_SIGNATURE_free(signature); return 1; } } return 0; } static int print_reset_indent(BIO **out, int pop_f_prefix, long saved_indent) { BIO_set_indent(*out, saved_indent); if (pop_f_prefix) { BIO *next = BIO_pop(*out); BIO_free(*out); *out = next; } return 1; } static int print_set_indent(BIO **out, int *pop_f_prefix, long *saved_indent, long indent) { *pop_f_prefix = 0; *saved_indent = 0; if (indent > 0) { long i = BIO_get_indent(*out); *saved_indent = (i < 0 ? 0 : i); if (BIO_set_indent(*out, indent) <= 0) { BIO *prefbio = BIO_new(BIO_f_prefix()); if (prefbio == NULL) return 0; *out = BIO_push(prefbio, *out); *pop_f_prefix = 1; } if (BIO_set_indent(*out, indent) <= 0) { print_reset_indent(out, *pop_f_prefix, *saved_indent); return 0; } } return 1; } static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent, const char *kstr) { return BIO_indent(out, indent, 128) && BIO_printf(out, "%s algorithm \"%s\" unsupported\n", kstr, OBJ_nid2ln(pkey->type)) > 0; } static int print_pkey(const EVP_PKEY *pkey, BIO *out, int indent, int selection /* For provided encoding */, const char *propquery /* For provided encoding */, int (*legacy_print)(BIO *out, const EVP_PKEY *pkey, int indent, ASN1_PCTX *pctx), ASN1_PCTX *legacy_pctx /* For legacy print */) { int pop_f_prefix; long saved_indent; OSSL_ENCODER_CTX *ctx = NULL; int ret = -2; /* default to unsupported */ if (!print_set_indent(&out, &pop_f_prefix, &saved_indent, indent)) return 0; ctx = OSSL_ENCODER_CTX_new_for_pkey(pkey, selection, "TEXT", NULL, propquery); if (OSSL_ENCODER_CTX_get_num_encoders(ctx) != 0) ret = OSSL_ENCODER_to_bio(ctx, out); OSSL_ENCODER_CTX_free(ctx); if (ret != -2) goto end; /* legacy fallback */ if (legacy_print != NULL) ret = legacy_print(out, pkey, 0, legacy_pctx); else ret = unsup_alg(out, pkey, 0, "Public Key"); end: print_reset_indent(&out, pop_f_prefix, saved_indent); return ret; } int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey, int indent, ASN1_PCTX *pctx) { return print_pkey(pkey, out, indent, EVP_PKEY_PUBLIC_KEY, NULL, (pkey->ameth != NULL ? pkey->ameth->pub_print : NULL), pctx); } int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey, int indent, ASN1_PCTX *pctx) { return print_pkey(pkey, out, indent, EVP_PKEY_KEYPAIR, NULL, (pkey->ameth != NULL ? pkey->ameth->priv_print : NULL), pctx); } int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey, int indent, ASN1_PCTX *pctx) { return print_pkey(pkey, out, indent, EVP_PKEY_KEY_PARAMETERS, NULL, (pkey->ameth != NULL ? pkey->ameth->param_print : NULL), pctx); } # ifndef OPENSSL_NO_STDIO int EVP_PKEY_print_public_fp(FILE *fp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *pctx) { int ret; BIO *b = BIO_new_fp(fp, BIO_NOCLOSE); if (b == NULL) return 0; ret = EVP_PKEY_print_public(b, pkey, indent, pctx); BIO_free(b); return ret; } int EVP_PKEY_print_private_fp(FILE *fp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *pctx) { int ret; BIO *b = BIO_new_fp(fp, BIO_NOCLOSE); if (b == NULL) return 0; ret = EVP_PKEY_print_private(b, pkey, indent, pctx); BIO_free(b); return ret; } int EVP_PKEY_print_params_fp(FILE *fp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *pctx) { int ret; BIO *b = BIO_new_fp(fp, BIO_NOCLOSE); if (b == NULL) return 0; ret = EVP_PKEY_print_params(b, pkey, indent, pctx); BIO_free(b); return ret; } # endif static void mdname2nid(const char *mdname, void *data) { int *nid = (int *)data; if (*nid != NID_undef) return; *nid = OBJ_sn2nid(mdname); if (*nid == NID_undef) *nid = OBJ_ln2nid(mdname); } static int legacy_asn1_ctrl_to_param(EVP_PKEY *pkey, int op, int arg1, void *arg2) { if (pkey->keymgmt == NULL) return 0; switch (op) { case ASN1_PKEY_CTRL_DEFAULT_MD_NID: { char mdname[80] = ""; int rv = EVP_PKEY_get_default_digest_name(pkey, mdname, sizeof(mdname)); if (rv > 0) { int mdnum; OSSL_LIB_CTX *libctx = ossl_provider_libctx(pkey->keymgmt->prov); /* Make sure the MD is in the namemap if available */ EVP_MD *md; OSSL_NAMEMAP *namemap; int nid = NID_undef; (void)ERR_set_mark(); md = EVP_MD_fetch(libctx, mdname, NULL); (void)ERR_pop_to_mark(); namemap = ossl_namemap_stored(libctx); /* * The only reason to fetch the MD was to make sure it is in the * namemap. We can immediately free it. */ EVP_MD_free(md); mdnum = ossl_namemap_name2num(namemap, mdname); if (mdnum == 0) return 0; /* * We have the namemap number - now we need to find the * associated nid */ if (!ossl_namemap_doall_names(namemap, mdnum, mdname2nid, &nid)) return 0; *(int *)arg2 = nid; } return rv; } default: return -2; } } static int evp_pkey_asn1_ctrl(EVP_PKEY *pkey, int op, int arg1, void *arg2) { if (pkey->ameth == NULL) return legacy_asn1_ctrl_to_param(pkey, op, arg1, arg2); if (pkey->ameth->pkey_ctrl == NULL) return -2; return pkey->ameth->pkey_ctrl(pkey, op, arg1, arg2); } int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid) { if (pkey == NULL) return 0; return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid); } int EVP_PKEY_get_default_digest_name(EVP_PKEY *pkey, char *mdname, size_t mdname_sz) { if (pkey->ameth == NULL) return evp_keymgmt_util_get_deflt_digest_name(pkey->keymgmt, pkey->keydata, mdname, mdname_sz); { int nid = NID_undef; int rv = EVP_PKEY_get_default_digest_nid(pkey, &nid); const char *name = rv > 0 ? OBJ_nid2sn(nid) : NULL; if (rv > 0) OPENSSL_strlcpy(mdname, name, mdname_sz); return rv; } } int EVP_PKEY_get_group_name(const EVP_PKEY *pkey, char *gname, size_t gname_sz, size_t *gname_len) { return EVP_PKEY_get_utf8_string_param(pkey, OSSL_PKEY_PARAM_GROUP_NAME, gname, gname_sz, gname_len); } int EVP_PKEY_digestsign_supports_digest(EVP_PKEY *pkey, OSSL_LIB_CTX *libctx, const char *name, const char *propq) { int rv; EVP_MD_CTX *ctx = NULL; if ((ctx = EVP_MD_CTX_new()) == NULL) return -1; ERR_set_mark(); rv = EVP_DigestSignInit_ex(ctx, NULL, name, libctx, propq, pkey, NULL); ERR_pop_to_mark(); EVP_MD_CTX_free(ctx); return rv; } int EVP_PKEY_set1_encoded_public_key(EVP_PKEY *pkey, const unsigned char *pub, size_t publen) { if (pkey == NULL) return 0; if (evp_pkey_is_provided(pkey)) return EVP_PKEY_set_octet_string_param(pkey, OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, (unsigned char *)pub, publen); if (publen > INT_MAX) return 0; /* Historically this function was EVP_PKEY_set1_tls_encodedpoint */ if (evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SET1_TLS_ENCPT, publen, (void *)pub) <= 0) return 0; return 1; } size_t EVP_PKEY_get1_encoded_public_key(EVP_PKEY *pkey, unsigned char **ppub) { int rv; if (pkey == NULL) return 0; if (evp_pkey_is_provided(pkey)) { size_t return_size = OSSL_PARAM_UNMODIFIED; unsigned char *buf; /* * We know that this is going to fail, but it will give us a size * to allocate. */ EVP_PKEY_get_octet_string_param(pkey, OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0, &return_size); if (return_size == OSSL_PARAM_UNMODIFIED) return 0; *ppub = NULL; buf = OPENSSL_malloc(return_size); if (buf == NULL) return 0; if (!EVP_PKEY_get_octet_string_param(pkey, OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, buf, return_size, NULL)) { OPENSSL_free(buf); return 0; } *ppub = buf; return return_size; } rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_GET1_TLS_ENCPT, 0, ppub); if (rv <= 0) return 0; return rv; } #endif /* FIPS_MODULE */ /*- All methods below can also be used in FIPS_MODULE */ EVP_PKEY *EVP_PKEY_new(void) { EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret)); if (ret == NULL) { ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); return NULL; } ret->type = EVP_PKEY_NONE; ret->save_type = EVP_PKEY_NONE; ret->references = 1; ret->lock = CRYPTO_THREAD_lock_new(); if (ret->lock == NULL) { EVPerr(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); goto err; } #ifndef FIPS_MODULE ret->save_parameters = 1; if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EVP_PKEY, ret, &ret->ex_data)) { ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); goto err; } #endif return ret; err: CRYPTO_THREAD_lock_free(ret->lock); OPENSSL_free(ret); return NULL; } /* * Setup a public key management method. * * For legacy keys, either |type| or |str| is expected to have the type * information. In this case, the setup consists of finding an ASN1 method * and potentially an ENGINE, and setting those fields in |pkey|. * * For provider side keys, |keymgmt| is expected to be non-NULL. In this * case, the setup consists of setting the |keymgmt| field in |pkey|. * * If pkey is NULL just return 1 or 0 if the key management method exists. */ static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str, int len, EVP_KEYMGMT *keymgmt) { #ifndef FIPS_MODULE const EVP_PKEY_ASN1_METHOD *ameth = NULL; ENGINE **eptr = (e == NULL) ? &e : NULL; #endif /* * The setups can't set both legacy and provider side methods. * It is forbidden */ if (!ossl_assert(type == EVP_PKEY_NONE || keymgmt == NULL) || !ossl_assert(e == NULL || keymgmt == NULL)) { ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); return 0; } if (pkey != NULL) { int free_it = 0; #ifndef FIPS_MODULE free_it = free_it || pkey->pkey.ptr != NULL; #endif free_it = free_it || pkey->keydata != NULL; if (free_it) evp_pkey_free_it(pkey); #ifndef FIPS_MODULE /* * If key type matches and a method exists then this lookup has * succeeded once so just indicate success. */ if (pkey->type != EVP_PKEY_NONE && type == pkey->save_type && pkey->ameth != NULL) return 1; # ifndef OPENSSL_NO_ENGINE /* If we have ENGINEs release them */ ENGINE_finish(pkey->engine); pkey->engine = NULL; ENGINE_finish(pkey->pmeth_engine); pkey->pmeth_engine = NULL; # endif #endif } #ifndef FIPS_MODULE if (str != NULL) ameth = EVP_PKEY_asn1_find_str(eptr, str, len); else if (type != EVP_PKEY_NONE) ameth = EVP_PKEY_asn1_find(eptr, type); # ifndef OPENSSL_NO_ENGINE if (pkey == NULL && eptr != NULL) ENGINE_finish(e); # endif #endif { int check = 1; #ifndef FIPS_MODULE check = check && ameth == NULL; #endif check = check && keymgmt == NULL; if (check) { ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_ALGORITHM); return 0; } } if (pkey != NULL) { if (keymgmt != NULL && !EVP_KEYMGMT_up_ref(keymgmt)) { ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); return 0; } pkey->keymgmt = keymgmt; pkey->save_type = type; pkey->type = type; #ifndef FIPS_MODULE /* * If the internal "origin" key is provider side, don't save |ameth|. * The main reason is that |ameth| is one factor to detect that the * internal "origin" key is a legacy one. */ if (keymgmt == NULL) pkey->ameth = ameth; /* * The EVP_PKEY_ASN1_METHOD |pkey_id| retains its legacy key purpose * for any key type that has a legacy implementation, regardless of * if the internal key is a legacy or a provider side one. When * there is no legacy implementation for the key, the type becomes * EVP_PKEY_KEYMGMT, which indicates that one should be cautious * with functions that expect legacy internal keys. */ if (ameth != NULL) { if (type == EVP_PKEY_NONE) pkey->type = ameth->pkey_id; } else { pkey->type = EVP_PKEY_KEYMGMT; } # ifndef OPENSSL_NO_ENGINE if (eptr == NULL && e != NULL && !ENGINE_init(e)) { ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); return 0; } # endif pkey->engine = e; #endif } return 1; } #ifndef FIPS_MODULE static void find_ameth(const char *name, void *data) { const char **str = data; /* * The error messages from pkey_set_type() are uninteresting here, * and misleading. */ ERR_set_mark(); if (pkey_set_type(NULL, NULL, EVP_PKEY_NONE, name, strlen(name), NULL)) { if (str[0] == NULL) str[0] = name; else if (str[1] == NULL) str[1] = name; } ERR_pop_to_mark(); } #endif int EVP_PKEY_set_type_by_keymgmt(EVP_PKEY *pkey, EVP_KEYMGMT *keymgmt) { #ifndef FIPS_MODULE # define EVP_PKEY_TYPE_STR str[0] # define EVP_PKEY_TYPE_STRLEN (str[0] == NULL ? -1 : (int)strlen(str[0])) /* * Find at most two strings that have an associated EVP_PKEY_ASN1_METHOD * Ideally, only one should be found. If two (or more) are found, the * match is ambiguous. This should never happen, but... */ const char *str[2] = { NULL, NULL }; if (!EVP_KEYMGMT_names_do_all(keymgmt, find_ameth, &str) || str[1] != NULL) { ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); return 0; } #else # define EVP_PKEY_TYPE_STR NULL # define EVP_PKEY_TYPE_STRLEN -1 #endif return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, EVP_PKEY_TYPE_STR, EVP_PKEY_TYPE_STRLEN, keymgmt); #undef EVP_PKEY_TYPE_STR #undef EVP_PKEY_TYPE_STRLEN } int EVP_PKEY_up_ref(EVP_PKEY *pkey) { int i; if (CRYPTO_UP_REF(&pkey->references, &i, pkey->lock) <= 0) return 0; REF_PRINT_COUNT("EVP_PKEY", pkey); REF_ASSERT_ISNT(i < 2); return ((i > 1) ? 1 : 0); } #ifndef FIPS_MODULE EVP_PKEY *EVP_PKEY_dup(EVP_PKEY *pkey) { EVP_PKEY *dup_pk; if (pkey == NULL) { ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); return NULL; } if ((dup_pk = EVP_PKEY_new()) == NULL) return NULL; if (evp_pkey_is_blank(pkey)) goto done; if (evp_pkey_is_provided(pkey)) { if (!evp_keymgmt_util_copy(dup_pk, pkey, OSSL_KEYMGMT_SELECT_ALL)) goto err; goto done; } if (evp_pkey_is_legacy(pkey)) { const EVP_PKEY_ASN1_METHOD *ameth = pkey->ameth; if (ameth == NULL || ameth->copy == NULL) { if (pkey->pkey.ptr == NULL /* empty key, just set type */ && EVP_PKEY_set_type(dup_pk, pkey->type) != 0) goto done; ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_KEY_TYPE); goto err; } if (!ameth->copy(dup_pk, pkey)) goto err; goto done; } goto err; done: /* copy auxiliary data */ if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_EVP_PKEY, &dup_pk->ex_data, &pkey->ex_data)) goto err; if (pkey->attributes != NULL) { if ((dup_pk->attributes = ossl_x509at_dup(pkey->attributes)) == NULL) goto err; } return dup_pk; err: EVP_PKEY_free(dup_pk); return NULL; } void evp_pkey_free_legacy(EVP_PKEY *x) { const EVP_PKEY_ASN1_METHOD *ameth = x->ameth; ENGINE *tmpe = NULL; if (ameth == NULL && x->legacy_cache_pkey.ptr != NULL) ameth = EVP_PKEY_asn1_find(&tmpe, x->type); if (ameth != NULL) { if (x->legacy_cache_pkey.ptr != NULL) { /* * We should never have both a legacy origin key, and a key in the * legacy cache. */ assert(x->pkey.ptr == NULL); /* * For the purposes of freeing we make the legacy cache look like * a legacy origin key. */ x->pkey = x->legacy_cache_pkey; x->legacy_cache_pkey.ptr = NULL; } if (ameth->pkey_free != NULL) ameth->pkey_free(x); x->pkey.ptr = NULL; } # ifndef OPENSSL_NO_ENGINE ENGINE_finish(tmpe); ENGINE_finish(x->engine); x->engine = NULL; ENGINE_finish(x->pmeth_engine); x->pmeth_engine = NULL; # endif } #endif /* FIPS_MODULE */ static void evp_pkey_free_it(EVP_PKEY *x) { /* internal function; x is never NULL */ evp_keymgmt_util_clear_operation_cache(x, 1); #ifndef FIPS_MODULE evp_pkey_free_legacy(x); #endif if (x->keymgmt != NULL) { evp_keymgmt_freedata(x->keymgmt, x->keydata); EVP_KEYMGMT_free(x->keymgmt); x->keymgmt = NULL; x->keydata = NULL; } x->type = EVP_PKEY_NONE; } void EVP_PKEY_free(EVP_PKEY *x) { int i; if (x == NULL) return; CRYPTO_DOWN_REF(&x->references, &i, x->lock); REF_PRINT_COUNT("EVP_PKEY", x); if (i > 0) return; REF_ASSERT_ISNT(i < 0); evp_pkey_free_it(x); #ifndef FIPS_MODULE CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EVP_PKEY, x, &x->ex_data); #endif CRYPTO_THREAD_lock_free(x->lock); #ifndef FIPS_MODULE sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free); #endif OPENSSL_free(x); } int EVP_PKEY_get_size(const EVP_PKEY *pkey) { int size = 0; if (pkey != NULL) { size = pkey->cache.size; #ifndef FIPS_MODULE if (pkey->ameth != NULL && pkey->ameth->pkey_size != NULL) size = pkey->ameth->pkey_size(pkey); #endif } return size < 0 ? 0 : size; } const char *EVP_PKEY_get0_description(const EVP_PKEY *pkey) { if (!evp_pkey_is_assigned(pkey)) return NULL; if (evp_pkey_is_provided(pkey) && pkey->keymgmt->description != NULL) return pkey->keymgmt->description; #ifndef FIPS_MODULE if (pkey->ameth != NULL) return pkey->ameth->info; #endif return NULL; } void *evp_pkey_export_to_provider(EVP_PKEY *pk, OSSL_LIB_CTX *libctx, EVP_KEYMGMT **keymgmt, const char *propquery) { EVP_KEYMGMT *allocated_keymgmt = NULL; EVP_KEYMGMT *tmp_keymgmt = NULL; int selection = OSSL_KEYMGMT_SELECT_ALL; void *keydata = NULL; int check; if (pk == NULL) return NULL; /* No key data => nothing to export */ check = 1; #ifndef FIPS_MODULE check = check && pk->pkey.ptr == NULL; #endif check = check && pk->keydata == NULL; if (check) return NULL; #ifndef FIPS_MODULE if (pk->pkey.ptr != NULL) { /* * If the legacy key doesn't have an dirty counter or export function, * give up */ if (pk->ameth->dirty_cnt == NULL || pk->ameth->export_to == NULL) return NULL; } #endif if (keymgmt != NULL) { tmp_keymgmt = *keymgmt; *keymgmt = NULL; } /* * If no keymgmt was given or found, get a default keymgmt. We do so by * letting EVP_PKEY_CTX_new_from_pkey() do it for us, then we steal it. */ if (tmp_keymgmt == NULL) { EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new_from_pkey(libctx, pk, propquery); if (ctx == NULL) goto end; allocated_keymgmt = tmp_keymgmt = ctx->keymgmt; ctx->keymgmt = NULL; EVP_PKEY_CTX_free(ctx); } /* If there's still no keymgmt to be had, give up */ if (tmp_keymgmt == NULL) goto end; #ifndef FIPS_MODULE if (pk->pkey.ptr != NULL) { OP_CACHE_ELEM *op; /* * If the legacy "origin" hasn't changed since last time, we try * to find our keymgmt in the operation cache. If it has changed, * |i| remains zero, and we will clear the cache further down. */ if (pk->ameth->dirty_cnt(pk) == pk->dirty_cnt_copy) { if (!CRYPTO_THREAD_read_lock(pk->lock)) goto end; op = evp_keymgmt_util_find_operation_cache(pk, tmp_keymgmt, selection); /* * If |tmp_keymgmt| is present in the operation cache, it means * that export doesn't need to be redone. In that case, we take * token copies of the cached pointers, to have token success * values to return. */ if (op != NULL && op->keymgmt != NULL) { keydata = op->keydata; CRYPTO_THREAD_unlock(pk->lock); goto end; } CRYPTO_THREAD_unlock(pk->lock); } /* Make sure that the keymgmt key type matches the legacy NID */ if (!EVP_KEYMGMT_is_a(tmp_keymgmt, OBJ_nid2sn(pk->type))) goto end; if ((keydata = evp_keymgmt_newdata(tmp_keymgmt)) == NULL) goto end; if (!pk->ameth->export_to(pk, keydata, tmp_keymgmt->import, libctx, propquery)) { evp_keymgmt_freedata(tmp_keymgmt, keydata); keydata = NULL; goto end; } /* * If the dirty counter changed since last time, then clear the * operation cache. In that case, we know that |i| is zero. Just * in case this is a re-export, we increment then decrement the * keymgmt reference counter. */ if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) { /* refcnt++ */ evp_keymgmt_freedata(tmp_keymgmt, keydata); keydata = NULL; goto end; } if (!CRYPTO_THREAD_write_lock(pk->lock)) goto end; if (pk->ameth->dirty_cnt(pk) != pk->dirty_cnt_copy && !evp_keymgmt_util_clear_operation_cache(pk, 0)) { CRYPTO_THREAD_unlock(pk->lock); evp_keymgmt_freedata(tmp_keymgmt, keydata); keydata = NULL; EVP_KEYMGMT_free(tmp_keymgmt); goto end; } EVP_KEYMGMT_free(tmp_keymgmt); /* refcnt-- */ /* Check to make sure some other thread didn't get there first */ op = evp_keymgmt_util_find_operation_cache(pk, tmp_keymgmt, selection); if (op != NULL && op->keymgmt != NULL) { void *tmp_keydata = op->keydata; CRYPTO_THREAD_unlock(pk->lock); evp_keymgmt_freedata(tmp_keymgmt, keydata); keydata = tmp_keydata; goto end; } /* Add the new export to the operation cache */ if (!evp_keymgmt_util_cache_keydata(pk, tmp_keymgmt, keydata, selection)) { CRYPTO_THREAD_unlock(pk->lock); evp_keymgmt_freedata(tmp_keymgmt, keydata); keydata = NULL; goto end; } /* Synchronize the dirty count */ pk->dirty_cnt_copy = pk->ameth->dirty_cnt(pk); CRYPTO_THREAD_unlock(pk->lock); goto end; } #endif /* FIPS_MODULE */ keydata = evp_keymgmt_util_export_to_provider(pk, tmp_keymgmt, selection); end: /* * If nothing was exported, |tmp_keymgmt| might point at a freed * EVP_KEYMGMT, so we clear it to be safe. It shouldn't be useful for * the caller either way in that case. */ if (keydata == NULL) tmp_keymgmt = NULL; if (keymgmt != NULL && tmp_keymgmt != NULL) { *keymgmt = tmp_keymgmt; allocated_keymgmt = NULL; } EVP_KEYMGMT_free(allocated_keymgmt); return keydata; } #ifndef FIPS_MODULE int evp_pkey_copy_downgraded(EVP_PKEY **dest, const EVP_PKEY *src) { EVP_PKEY *allocpkey = NULL; if (!ossl_assert(dest != NULL)) return 0; if (evp_pkey_is_assigned(src) && evp_pkey_is_provided(src)) { EVP_KEYMGMT *keymgmt = src->keymgmt; void *keydata = src->keydata; int type = src->type; const char *keytype = NULL; keytype = EVP_KEYMGMT_get0_name(keymgmt); /* * If the type is EVP_PKEY_NONE, then we have a problem somewhere * else in our code. If it's not one of the well known EVP_PKEY_xxx * values, it should at least be EVP_PKEY_KEYMGMT at this point. * The check is kept as a safety measure. */ if (!ossl_assert(type != EVP_PKEY_NONE)) { ERR_raise_data(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR, "keymgmt key type = %s but legacy type = EVP_PKEY_NONE", keytype); return 0; } /* Prefer the legacy key type name for error reporting */ if (type != EVP_PKEY_KEYMGMT) keytype = OBJ_nid2sn(type); /* Make sure we have a clean slate to copy into */ if (*dest == NULL) { allocpkey = *dest = EVP_PKEY_new(); if (*dest == NULL) { ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); return 0; } } else { evp_pkey_free_it(*dest); } if (EVP_PKEY_set_type(*dest, type)) { /* If the key is typed but empty, we're done */ if (keydata == NULL) return 1; if ((*dest)->ameth->import_from == NULL) { ERR_raise_data(ERR_LIB_EVP, EVP_R_NO_IMPORT_FUNCTION, "key type = %s", keytype); } else { /* * We perform the export in the same libctx as the keymgmt * that we are using. */ OSSL_LIB_CTX *libctx = ossl_provider_libctx(keymgmt->prov); EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_from_pkey(libctx, *dest, NULL); if (pctx == NULL) ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); if (pctx != NULL && evp_keymgmt_export(keymgmt, keydata, OSSL_KEYMGMT_SELECT_ALL, (*dest)->ameth->import_from, pctx)) { /* Synchronize the dirty count */ (*dest)->dirty_cnt_copy = (*dest)->ameth->dirty_cnt(*dest); EVP_PKEY_CTX_free(pctx); return 1; } EVP_PKEY_CTX_free(pctx); } ERR_raise_data(ERR_LIB_EVP, EVP_R_KEYMGMT_EXPORT_FAILURE, "key type = %s", keytype); } } if (allocpkey != NULL) { EVP_PKEY_free(allocpkey); *dest = NULL; } return 0; } void *evp_pkey_get_legacy(EVP_PKEY *pk) { EVP_PKEY *tmp_copy = NULL; void *ret = NULL; if (!ossl_assert(pk != NULL)) return NULL; /* * If this isn't an assigned provider side key, we just use any existing * origin legacy key. */ if (!evp_pkey_is_assigned(pk)) return NULL; if (!evp_pkey_is_provided(pk)) return pk->pkey.ptr; if (!CRYPTO_THREAD_read_lock(pk->lock)) return NULL; ret = pk->legacy_cache_pkey.ptr; if (!CRYPTO_THREAD_unlock(pk->lock)) return NULL; if (ret != NULL) return ret; if (!evp_pkey_copy_downgraded(&tmp_copy, pk)) goto err; if (!CRYPTO_THREAD_write_lock(pk->lock)) goto err; /* Check again in case some other thread has updated it in the meantime */ ret = pk->legacy_cache_pkey.ptr; if (ret == NULL) { /* Steal the legacy key reference from the temporary copy */ ret = pk->legacy_cache_pkey.ptr = tmp_copy->pkey.ptr; tmp_copy->pkey.ptr = NULL; } if (!CRYPTO_THREAD_unlock(pk->lock)) { ret = NULL; goto err; } err: EVP_PKEY_free(tmp_copy); return ret; } #endif /* FIPS_MODULE */ int EVP_PKEY_get_bn_param(const EVP_PKEY *pkey, const char *key_name, BIGNUM **bn) { int ret = 0; OSSL_PARAM params[2]; unsigned char buffer[2048]; unsigned char *buf = NULL; size_t buf_sz = 0; if (key_name == NULL || bn == NULL) return 0; memset(buffer, 0, sizeof(buffer)); params[0] = OSSL_PARAM_construct_BN(key_name, buffer, sizeof(buffer)); params[1] = OSSL_PARAM_construct_end(); if (!EVP_PKEY_get_params(pkey, params)) { if (!OSSL_PARAM_modified(params) || params[0].return_size == 0) return 0; buf_sz = params[0].return_size; /* * If it failed because the buffer was too small then allocate the * required buffer size and retry. */ buf = OPENSSL_zalloc(buf_sz); if (buf == NULL) return 0; params[0].data = buf; params[0].data_size = buf_sz; if (!EVP_PKEY_get_params(pkey, params)) goto err; } /* Fail if the param was not found */ if (!OSSL_PARAM_modified(params)) goto err; ret = OSSL_PARAM_get_BN(params, bn); err: if (buf != NULL) { if (OSSL_PARAM_modified(params)) OPENSSL_clear_free(buf, buf_sz); else OPENSSL_free(buf); } else if (OSSL_PARAM_modified(params)) { OPENSSL_cleanse(buffer, params[0].data_size); } return ret; } int EVP_PKEY_get_octet_string_param(const EVP_PKEY *pkey, const char *key_name, unsigned char *buf, size_t max_buf_sz, size_t *out_len) { OSSL_PARAM params[2]; int ret1 = 0, ret2 = 0; if (key_name == NULL) return 0; params[0] = OSSL_PARAM_construct_octet_string(key_name, buf, max_buf_sz); params[1] = OSSL_PARAM_construct_end(); if ((ret1 = EVP_PKEY_get_params(pkey, params))) ret2 = OSSL_PARAM_modified(params); if (ret2 && out_len != NULL) *out_len = params[0].return_size; return ret1 && ret2; } int EVP_PKEY_get_utf8_string_param(const EVP_PKEY *pkey, const char *key_name, char *str, size_t max_buf_sz, size_t *out_len) { OSSL_PARAM params[2]; int ret1 = 0, ret2 = 0; if (key_name == NULL) return 0; params[0] = OSSL_PARAM_construct_utf8_string(key_name, str, max_buf_sz); params[1] = OSSL_PARAM_construct_end(); if ((ret1 = EVP_PKEY_get_params(pkey, params))) ret2 = OSSL_PARAM_modified(params); if (ret2 && out_len != NULL) *out_len = params[0].return_size; if (ret2 && params[0].return_size == max_buf_sz) /* There was no space for a NUL byte */ return 0; /* Add a terminating NUL byte for good measure */ if (ret2 && str != NULL) str[params[0].return_size] = '\0'; return ret1 && ret2; } int EVP_PKEY_get_int_param(const EVP_PKEY *pkey, const char *key_name, int *out) { OSSL_PARAM params[2]; if (key_name == NULL) return 0; params[0] = OSSL_PARAM_construct_int(key_name, out); params[1] = OSSL_PARAM_construct_end(); return EVP_PKEY_get_params(pkey, params) && OSSL_PARAM_modified(params); } int EVP_PKEY_get_size_t_param(const EVP_PKEY *pkey, const char *key_name, size_t *out) { OSSL_PARAM params[2]; if (key_name == NULL) return 0; params[0] = OSSL_PARAM_construct_size_t(key_name, out); params[1] = OSSL_PARAM_construct_end(); return EVP_PKEY_get_params(pkey, params) && OSSL_PARAM_modified(params); } int EVP_PKEY_set_int_param(EVP_PKEY *pkey, const char *key_name, int in) { OSSL_PARAM params[2]; if (key_name == NULL) return 0; params[0] = OSSL_PARAM_construct_int(key_name, &in); params[1] = OSSL_PARAM_construct_end(); return EVP_PKEY_set_params(pkey, params); } int EVP_PKEY_set_size_t_param(EVP_PKEY *pkey, const char *key_name, size_t in) { OSSL_PARAM params[2]; if (key_name == NULL) return 0; params[0] = OSSL_PARAM_construct_size_t(key_name, &in); params[1] = OSSL_PARAM_construct_end(); return EVP_PKEY_set_params(pkey, params); } int EVP_PKEY_set_bn_param(EVP_PKEY *pkey, const char *key_name, const BIGNUM *bn) { OSSL_PARAM params[2]; unsigned char buffer[2048]; int bsize = 0; if (key_name == NULL || bn == NULL || pkey == NULL || !evp_pkey_is_assigned(pkey)) return 0; bsize = BN_num_bytes(bn); if (!ossl_assert(bsize <= (int)sizeof(buffer))) return 0; if (BN_bn2nativepad(bn, buffer, bsize) < 0) return 0; params[0] = OSSL_PARAM_construct_BN(key_name, buffer, bsize); params[1] = OSSL_PARAM_construct_end(); return EVP_PKEY_set_params(pkey, params); } int EVP_PKEY_set_utf8_string_param(EVP_PKEY *pkey, const char *key_name, const char *str) { OSSL_PARAM params[2]; if (key_name == NULL) return 0; params[0] = OSSL_PARAM_construct_utf8_string(key_name, (char *)str, 0); params[1] = OSSL_PARAM_construct_end(); return EVP_PKEY_set_params(pkey, params); } int EVP_PKEY_set_octet_string_param(EVP_PKEY *pkey, const char *key_name, const unsigned char *buf, size_t bsize) { OSSL_PARAM params[2]; if (key_name == NULL) return 0; params[0] = OSSL_PARAM_construct_octet_string(key_name, (unsigned char *)buf, bsize); params[1] = OSSL_PARAM_construct_end(); return EVP_PKEY_set_params(pkey, params); } const OSSL_PARAM *EVP_PKEY_settable_params(const EVP_PKEY *pkey) { return (pkey != NULL && evp_pkey_is_provided(pkey)) ? EVP_KEYMGMT_settable_params(pkey->keymgmt) : NULL; } int EVP_PKEY_set_params(EVP_PKEY *pkey, OSSL_PARAM params[]) { if (pkey != NULL) { if (evp_pkey_is_provided(pkey)) { pkey->dirty_cnt++; return evp_keymgmt_set_params(pkey->keymgmt, pkey->keydata, params); } #ifndef FIPS_MODULE /* * We will hopefully never find the need to set individual data in * EVP_PKEYs with a legacy internal key, but we can't be entirely * sure. This bit of code can be enabled if we find the need. If * not, it can safely be removed when #legacy support is removed. */ # if 0 else if (evp_pkey_is_legacy(pkey)) { return evp_pkey_set_params_to_ctrl(pkey, params); } # endif #endif } ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY); return 0; } const OSSL_PARAM *EVP_PKEY_gettable_params(const EVP_PKEY *pkey) { return (pkey != NULL && evp_pkey_is_provided(pkey)) ? EVP_KEYMGMT_gettable_params(pkey->keymgmt) : NULL; } int EVP_PKEY_get_params(const EVP_PKEY *pkey, OSSL_PARAM params[]) { if (pkey != NULL) { if (evp_pkey_is_provided(pkey)) return evp_keymgmt_get_params(pkey->keymgmt, pkey->keydata, params) > 0; #ifndef FIPS_MODULE else if (evp_pkey_is_legacy(pkey)) return evp_pkey_get_params_to_ctrl(pkey, params) > 0; #endif } ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY); return 0; } #ifndef FIPS_MODULE int EVP_PKEY_get_ec_point_conv_form(const EVP_PKEY *pkey) { char name[80]; size_t name_len; if (pkey == NULL) return 0; if (pkey->keymgmt == NULL || pkey->keydata == NULL) { # ifndef OPENSSL_NO_EC /* Might work through the legacy route */ const EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey); if (ec == NULL) return 0; return EC_KEY_get_conv_form(ec); # else return 0; # endif } if (!EVP_PKEY_get_utf8_string_param(pkey, OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, name, sizeof(name), &name_len)) return 0; if (strcmp(name, "uncompressed") == 0) return POINT_CONVERSION_UNCOMPRESSED; if (strcmp(name, "compressed") == 0) return POINT_CONVERSION_COMPRESSED; if (strcmp(name, "hybrid") == 0) return POINT_CONVERSION_HYBRID; return 0; } int EVP_PKEY_get_field_type(const EVP_PKEY *pkey) { char fstr[80]; size_t fstrlen; if (pkey == NULL) return 0; if (pkey->keymgmt == NULL || pkey->keydata == NULL) { # ifndef OPENSSL_NO_EC /* Might work through the legacy route */ const EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey); const EC_GROUP *grp; if (ec == NULL) return 0; grp = EC_KEY_get0_group(ec); if (grp == NULL) return 0; return EC_GROUP_get_field_type(grp); # else return 0; # endif } if (!EVP_PKEY_get_utf8_string_param(pkey, OSSL_PKEY_PARAM_EC_FIELD_TYPE, fstr, sizeof(fstr), &fstrlen)) return 0; if (strcmp(fstr, SN_X9_62_prime_field) == 0) return NID_X9_62_prime_field; else if (strcmp(fstr, SN_X9_62_characteristic_two_field)) return NID_X9_62_characteristic_two_field; return 0; } #endif