X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fevp%2Fpmeth_fn.c;h=d49d80bffeb6c74bb3f37a36b7c79332b35020f9;hp=de1c07e171144b1ee5b7e812dabad96fa24b7d90;hb=0ddf74bf1c47b554c3d2c086ff2acb18bcc81bc6;hpb=e3713c365c2657236439fea00822a43aa396d112 diff --git a/crypto/evp/pmeth_fn.c b/crypto/evp/pmeth_fn.c index de1c07e171..d49d80bffe 100644 --- a/crypto/evp/pmeth_fn.c +++ b/crypto/evp/pmeth_fn.c @@ -1,7 +1,7 @@ /* * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved. * - * Licensed under the OpenSSL license (the "License"). You may not use + * 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 @@ -9,126 +9,556 @@ #include #include -#include "internal/cryptlib.h" #include #include -#include "internal/evp_int.h" - -#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) { \ - EVPerr(err, EVP_R_INVALID_KEY); /*ckerr_ignore*/ \ - return 0; \ - } \ - if (!arg) { \ - *arglen = pksize; \ - return 1; \ - } \ - if (*arglen < pksize) { \ - EVPerr(err, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/ \ - return 0; \ - } \ +#include "internal/cryptlib.h" +#include "crypto/evp.h" +#include "internal/provider.h" +#include "evp_local.h" + +static EVP_SIGNATURE *evp_signature_new(OSSL_PROVIDER *prov) +{ + EVP_SIGNATURE *signature = OPENSSL_zalloc(sizeof(EVP_SIGNATURE)); + + signature->lock = CRYPTO_THREAD_lock_new(); + if (signature->lock == NULL) { + OPENSSL_free(signature); + return NULL; } + signature->prov = prov; + ossl_provider_up_ref(prov); + signature->refcnt = 1; -int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx) + return signature; +} + +static void *evp_signature_from_dispatch(int name_id, + const OSSL_DISPATCH *fns, + OSSL_PROVIDER *prov) { - int ret; - if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) { - EVPerr(EVP_F_EVP_PKEY_SIGN_INIT, - EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + EVP_SIGNATURE *signature = NULL; + int ctxfncnt = 0, signfncnt = 0, verifyfncnt = 0, verifyrecfncnt = 0; + int digsignfncnt = 0, digverifyfncnt = 0; + int gparamfncnt = 0, sparamfncnt = 0, gmdparamfncnt = 0, smdparamfncnt = 0; + + if ((signature = evp_signature_new(prov)) == NULL) { + ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); + goto err; + } + + signature->name_id = name_id; + + for (; fns->function_id != 0; fns++) { + switch (fns->function_id) { + case OSSL_FUNC_SIGNATURE_NEWCTX: + if (signature->newctx != NULL) + break; + signature->newctx = OSSL_get_OP_signature_newctx(fns); + ctxfncnt++; + break; + case OSSL_FUNC_SIGNATURE_SIGN_INIT: + if (signature->sign_init != NULL) + break; + signature->sign_init = OSSL_get_OP_signature_sign_init(fns); + signfncnt++; + break; + case OSSL_FUNC_SIGNATURE_SIGN: + if (signature->sign != NULL) + break; + signature->sign = OSSL_get_OP_signature_sign(fns); + signfncnt++; + break; + case OSSL_FUNC_SIGNATURE_VERIFY_INIT: + if (signature->verify_init != NULL) + break; + signature->verify_init = OSSL_get_OP_signature_verify_init(fns); + verifyfncnt++; + break; + case OSSL_FUNC_SIGNATURE_VERIFY: + if (signature->verify != NULL) + break; + signature->verify = OSSL_get_OP_signature_verify(fns); + verifyfncnt++; + break; + case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER_INIT: + if (signature->verify_recover_init != NULL) + break; + signature->verify_recover_init + = OSSL_get_OP_signature_verify_recover_init(fns); + verifyrecfncnt++; + break; + case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER: + if (signature->verify_recover != NULL) + break; + signature->verify_recover + = OSSL_get_OP_signature_verify_recover(fns); + verifyrecfncnt++; + break; + case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT: + if (signature->digest_sign_init != NULL) + break; + signature->digest_sign_init + = OSSL_get_OP_signature_digest_sign_init(fns); + digsignfncnt++; + break; + case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE: + if (signature->digest_sign_update != NULL) + break; + signature->digest_sign_update + = OSSL_get_OP_signature_digest_sign_update(fns); + digsignfncnt++; + break; + case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL: + if (signature->digest_sign_final != NULL) + break; + signature->digest_sign_final + = OSSL_get_OP_signature_digest_sign_final(fns); + digsignfncnt++; + break; + case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT: + if (signature->digest_verify_init != NULL) + break; + signature->digest_verify_init + = OSSL_get_OP_signature_digest_verify_init(fns); + digverifyfncnt++; + break; + case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE: + if (signature->digest_verify_update != NULL) + break; + signature->digest_verify_update + = OSSL_get_OP_signature_digest_verify_update(fns); + digverifyfncnt++; + break; + case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL: + if (signature->digest_verify_final != NULL) + break; + signature->digest_verify_final + = OSSL_get_OP_signature_digest_verify_final(fns); + digverifyfncnt++; + break; + case OSSL_FUNC_SIGNATURE_FREECTX: + if (signature->freectx != NULL) + break; + signature->freectx = OSSL_get_OP_signature_freectx(fns); + ctxfncnt++; + break; + case OSSL_FUNC_SIGNATURE_DUPCTX: + if (signature->dupctx != NULL) + break; + signature->dupctx = OSSL_get_OP_signature_dupctx(fns); + break; + case OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS: + if (signature->get_ctx_params != NULL) + break; + signature->get_ctx_params + = OSSL_get_OP_signature_get_ctx_params(fns); + gparamfncnt++; + break; + case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS: + if (signature->gettable_ctx_params != NULL) + break; + signature->gettable_ctx_params + = OSSL_get_OP_signature_gettable_ctx_params(fns); + gparamfncnt++; + break; + case OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS: + if (signature->set_ctx_params != NULL) + break; + signature->set_ctx_params + = OSSL_get_OP_signature_set_ctx_params(fns); + sparamfncnt++; + break; + case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS: + if (signature->settable_ctx_params != NULL) + break; + signature->settable_ctx_params + = OSSL_get_OP_signature_settable_ctx_params(fns); + sparamfncnt++; + break; + case OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS: + if (signature->get_ctx_md_params != NULL) + break; + signature->get_ctx_md_params + = OSSL_get_OP_signature_get_ctx_md_params(fns); + gmdparamfncnt++; + break; + case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS: + if (signature->gettable_ctx_md_params != NULL) + break; + signature->gettable_ctx_md_params + = OSSL_get_OP_signature_gettable_ctx_md_params(fns); + gmdparamfncnt++; + break; + case OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS: + if (signature->set_ctx_md_params != NULL) + break; + signature->set_ctx_md_params + = OSSL_get_OP_signature_set_ctx_md_params(fns); + smdparamfncnt++; + break; + case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS: + if (signature->settable_ctx_md_params != NULL) + break; + signature->settable_ctx_md_params + = OSSL_get_OP_signature_settable_ctx_md_params(fns); + smdparamfncnt++; + break; + } + } + if (ctxfncnt != 2 + || (signfncnt == 0 + && verifyfncnt == 0 + && verifyrecfncnt == 0 + && digsignfncnt == 0 + && digverifyfncnt == 0) + || (signfncnt != 0 && signfncnt != 2) + || (verifyfncnt != 0 && verifyfncnt != 2) + || (verifyrecfncnt != 0 && verifyrecfncnt != 2) + || (digsignfncnt != 0 && digsignfncnt != 3) + || (digverifyfncnt != 0 && digverifyfncnt != 3) + || (gparamfncnt != 0 && gparamfncnt != 2) + || (sparamfncnt != 0 && sparamfncnt != 2) + || (gmdparamfncnt != 0 && gmdparamfncnt != 2) + || (smdparamfncnt != 0 && smdparamfncnt != 2)) { + /* + * In order to be a consistent set of functions we must have at least + * a set of context functions (newctx and freectx) as well as a set of + * "signature" functions: + * (sign_init, sign) or + * (verify_init verify) or + * (verify_recover_init, verify_recover) or + * (digest_sign_init, digest_sign_update, digest_sign_final) or + * (digest_verify_init, digest_verify_update, digest_verify_final). + * + * set_ctx_params and settable_ctx_params are optional, but if one of + * them is present then the other one must also be present. The same + * applies to get_ctx_params and gettable_ctx_params. The same rules + * apply to the "md_params" functions. The dupctx function is optional. + */ + ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); + goto err; + } + + return signature; + err: + EVP_SIGNATURE_free(signature); + return NULL; +} + +void EVP_SIGNATURE_free(EVP_SIGNATURE *signature) +{ + if (signature != NULL) { + int i; + + CRYPTO_DOWN_REF(&signature->refcnt, &i, signature->lock); + if (i > 0) + return; + ossl_provider_free(signature->prov); + CRYPTO_THREAD_lock_free(signature->lock); + OPENSSL_free(signature); + } +} + +int EVP_SIGNATURE_up_ref(EVP_SIGNATURE *signature) +{ + int ref = 0; + + CRYPTO_UP_REF(&signature->refcnt, &ref, signature->lock); + return 1; +} + +OSSL_PROVIDER *EVP_SIGNATURE_provider(const EVP_SIGNATURE *signature) +{ + return signature->prov; +} + +EVP_SIGNATURE *EVP_SIGNATURE_fetch(OPENSSL_CTX *ctx, const char *algorithm, + const char *properties) +{ + return evp_generic_fetch(ctx, OSSL_OP_SIGNATURE, algorithm, properties, + evp_signature_from_dispatch, + (int (*)(void *))EVP_SIGNATURE_up_ref, + (void (*)(void *))EVP_SIGNATURE_free); +} + +int EVP_SIGNATURE_is_a(const EVP_SIGNATURE *signature, const char *name) +{ + return evp_is_a(signature->prov, signature->name_id, name); +} + +int EVP_SIGNATURE_number(const EVP_SIGNATURE *signature) +{ + return signature->name_id; +} + +void EVP_SIGNATURE_do_all_provided(OPENSSL_CTX *libctx, + void (*fn)(EVP_SIGNATURE *signature, + void *arg), + void *arg) +{ + evp_generic_do_all(libctx, OSSL_OP_SIGNATURE, + (void (*)(void *, void *))fn, arg, + evp_signature_from_dispatch, + (void (*)(void *))EVP_SIGNATURE_free); +} + + +void EVP_SIGNATURE_names_do_all(const EVP_SIGNATURE *signature, + void (*fn)(const char *name, void *data), + void *data) +{ + if (signature->prov != NULL) + evp_names_do_all(signature->prov, signature->name_id, fn, data); +} + +static int evp_pkey_signature_init(EVP_PKEY_CTX *ctx, int operation) +{ + int ret = 0; + void *provkey = NULL; + EVP_SIGNATURE *signature = NULL; + + if (ctx == NULL) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); return -2; } - ctx->operation = EVP_PKEY_OP_SIGN; - if (!ctx->pmeth->sign_init) - return 1; - ret = ctx->pmeth->sign_init(ctx); + + evp_pkey_ctx_free_old_ops(ctx); + ctx->operation = operation; + + if (ctx->algorithm == NULL) + goto legacy; + + /* + * Because we cleared out old ops, we shouldn't need to worry about + * checking if signature is already there. Keymgmt is a different + * matter, as it isn't tied to a specific EVP_PKEY op. + */ + signature = EVP_SIGNATURE_fetch(ctx->libctx, ctx->algorithm, + ctx->propquery); + if (signature != NULL && ctx->keymgmt == NULL) { + int name_id = EVP_SIGNATURE_number(signature); + + ctx->keymgmt = evp_keymgmt_fetch_by_number(ctx->libctx, name_id, + ctx->propquery); + } + + if (ctx->keymgmt == NULL + || signature == NULL + || (EVP_KEYMGMT_provider(ctx->keymgmt) + != EVP_SIGNATURE_provider(signature))) { + /* + * We don't have the full support we need with provided methods, + * let's go see if legacy does. Also, we don't need to free + * ctx->keymgmt here, as it's not necessarily tied to this + * operation. It will be freed by EVP_PKEY_CTX_free(). + */ + EVP_SIGNATURE_free(signature); + goto legacy; + } + + ctx->op.sig.signature = signature; + + if (ctx->pkey != NULL) { + provkey = + evp_keymgmt_export_to_provider(ctx->pkey, ctx->keymgmt, 0); + if (provkey == NULL) { + EVPerr(0, EVP_R_INITIALIZATION_ERROR); + goto err; + } + } + ctx->op.sig.sigprovctx = signature->newctx(ossl_provider_ctx(signature->prov)); + if (ctx->op.sig.sigprovctx == NULL) { + /* The provider key can stay in the cache */ + EVPerr(0, EVP_R_INITIALIZATION_ERROR); + goto err; + } + + switch (operation) { + case EVP_PKEY_OP_SIGN: + if (signature->sign_init == NULL) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + ret = -2; + goto err; + } + ret = signature->sign_init(ctx->op.sig.sigprovctx, provkey); + break; + case EVP_PKEY_OP_VERIFY: + if (signature->verify_init == NULL) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + ret = -2; + goto err; + } + ret = signature->verify_init(ctx->op.sig.sigprovctx, provkey); + break; + case EVP_PKEY_OP_VERIFYRECOVER: + if (signature->verify_recover_init == NULL) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + ret = -2; + goto err; + } + ret = signature->verify_recover_init(ctx->op.sig.sigprovctx, provkey); + break; + default: + EVPerr(0, EVP_R_INITIALIZATION_ERROR); + goto err; + } + + if (ret <= 0) { + signature->freectx(ctx->op.sig.sigprovctx); + ctx->op.sig.sigprovctx = NULL; + goto err; + } + return 1; + + legacy: + if (ctx->pmeth == NULL + || (operation == EVP_PKEY_OP_SIGN && ctx->pmeth->sign == NULL) + || (operation == EVP_PKEY_OP_VERIFY && ctx->pmeth->verify == NULL) + || (operation == EVP_PKEY_OP_VERIFYRECOVER + && ctx->pmeth->verify_recover == NULL)) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return -2; + } + + switch (operation) { + case EVP_PKEY_OP_SIGN: + if (ctx->pmeth->sign_init == NULL) + return 1; + ret = ctx->pmeth->sign_init(ctx); + break; + case EVP_PKEY_OP_VERIFY: + if (ctx->pmeth->verify_init == NULL) + return 1; + ret = ctx->pmeth->verify_init(ctx); + break; + case EVP_PKEY_OP_VERIFYRECOVER: + if (ctx->pmeth->verify_recover_init == NULL) + return 1; + ret = ctx->pmeth->verify_recover_init(ctx); + break; + default: + EVPerr(0, EVP_R_INITIALIZATION_ERROR); + goto err; + } if (ret <= 0) - ctx->operation = EVP_PKEY_OP_UNDEFINED; + goto err; return ret; + + err: + ctx->operation = EVP_PKEY_OP_UNDEFINED; + return ret; +} + +int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx) +{ + return evp_pkey_signature_init(ctx, EVP_PKEY_OP_SIGN); } int EVP_PKEY_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, const unsigned char *tbs, size_t tbslen) { - if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) { - EVPerr(EVP_F_EVP_PKEY_SIGN, - EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + int ret; + + if (ctx == NULL) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); return -2; } + if (ctx->operation != EVP_PKEY_OP_SIGN) { - EVPerr(EVP_F_EVP_PKEY_SIGN, EVP_R_OPERATON_NOT_INITIALIZED); + EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED); return -1; } + + if (ctx->op.sig.sigprovctx == NULL) + goto legacy; + + ret = ctx->op.sig.signature->sign(ctx->op.sig.sigprovctx, sig, siglen, + SIZE_MAX, tbs, tbslen); + + return ret; + legacy: + + if (ctx->pmeth == NULL || ctx->pmeth->sign == NULL) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return -2; + } + M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN) return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen); } int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx) { - int ret; - if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) { - EVPerr(EVP_F_EVP_PKEY_VERIFY_INIT, - EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); - return -2; - } - ctx->operation = EVP_PKEY_OP_VERIFY; - if (!ctx->pmeth->verify_init) - return 1; - ret = ctx->pmeth->verify_init(ctx); - if (ret <= 0) - ctx->operation = EVP_PKEY_OP_UNDEFINED; - return ret; + return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFY); } int EVP_PKEY_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen, const unsigned char *tbs, size_t tbslen) { - if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) { - EVPerr(EVP_F_EVP_PKEY_VERIFY, - EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + int ret; + + if (ctx == NULL) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); return -2; } + if (ctx->operation != EVP_PKEY_OP_VERIFY) { - EVPerr(EVP_F_EVP_PKEY_VERIFY, EVP_R_OPERATON_NOT_INITIALIZED); + EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED); return -1; } + + if (ctx->op.sig.sigprovctx == NULL) + goto legacy; + + ret = ctx->op.sig.signature->verify(ctx->op.sig.sigprovctx, sig, siglen, + tbs, tbslen); + + return ret; + legacy: + if (ctx->pmeth == NULL || ctx->pmeth->verify == NULL) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return -2; + } + return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen); } int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx) { - int ret; - if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) { - EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER_INIT, - EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); - return -2; - } - ctx->operation = EVP_PKEY_OP_VERIFYRECOVER; - if (!ctx->pmeth->verify_recover_init) - return 1; - ret = ctx->pmeth->verify_recover_init(ctx); - if (ret <= 0) - ctx->operation = EVP_PKEY_OP_UNDEFINED; - return ret; + return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFYRECOVER); } int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx, unsigned char *rout, size_t *routlen, const unsigned char *sig, size_t siglen) { - if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) { - EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER, - EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + int ret; + + if (ctx == NULL) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); return -2; } + if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) { - EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER, EVP_R_OPERATON_NOT_INITIALIZED); + EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED); return -1; } + + if (ctx->op.sig.sigprovctx == NULL) + goto legacy; + + ret = ctx->op.sig.signature->verify_recover(ctx->op.sig.sigprovctx, rout, + routlen, + (rout == NULL ? 0 : *routlen), + sig, siglen); + return ret; + legacy: + if (ctx->pmeth == NULL || ctx->pmeth->verify_recover == NULL) { + EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return -2; + } M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER) return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen); } @@ -200,98 +630,3 @@ int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx, M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT) return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen); } - -int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx) -{ - int ret; - if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) { - EVPerr(EVP_F_EVP_PKEY_DERIVE_INIT, - EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); - return -2; - } - ctx->operation = EVP_PKEY_OP_DERIVE; - if (!ctx->pmeth->derive_init) - return 1; - ret = ctx->pmeth->derive_init(ctx); - if (ret <= 0) - ctx->operation = EVP_PKEY_OP_UNDEFINED; - return ret; -} - -int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer) -{ - int ret; - if (!ctx || !ctx->pmeth - || !(ctx->pmeth->derive || ctx->pmeth->encrypt || ctx->pmeth->decrypt) - || !ctx->pmeth->ctrl) { - EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, - EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); - return -2; - } - if (ctx->operation != EVP_PKEY_OP_DERIVE - && ctx->operation != EVP_PKEY_OP_ENCRYPT - && ctx->operation != EVP_PKEY_OP_DECRYPT) { - EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, - EVP_R_OPERATON_NOT_INITIALIZED); - return -1; - } - - ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer); - - if (ret <= 0) - return ret; - - if (ret == 2) - return 1; - - if (!ctx->pkey) { - EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_NO_KEY_SET); - return -1; - } - - if (ctx->pkey->type != peer->type) { - EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_DIFFERENT_KEY_TYPES); - return -1; - } - - /* - * For clarity. The error is if parameters in peer are - * present (!missing) but don't match. EVP_PKEY_cmp_parameters may return - * 1 (match), 0 (don't match) and -2 (comparison is not defined). -1 - * (different key types) is impossible here because it is checked earlier. - * -2 is OK for us here, as well as 1, so we can check for 0 only. - */ - if (!EVP_PKEY_missing_parameters(peer) && - !EVP_PKEY_cmp_parameters(ctx->pkey, peer)) { - EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_DIFFERENT_PARAMETERS); - return -1; - } - - EVP_PKEY_free(ctx->peerkey); - ctx->peerkey = peer; - - ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer); - - if (ret <= 0) { - ctx->peerkey = NULL; - return ret; - } - - EVP_PKEY_up_ref(peer); - return 1; -} - -int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *pkeylen) -{ - if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) { - EVPerr(EVP_F_EVP_PKEY_DERIVE, - EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); - return -2; - } - if (ctx->operation != EVP_PKEY_OP_DERIVE) { - EVPerr(EVP_F_EVP_PKEY_DERIVE, EVP_R_OPERATON_NOT_INITIALIZED); - return -1; - } - M_check_autoarg(ctx, key, pkeylen, EVP_F_EVP_PKEY_DERIVE) - return ctx->pmeth->derive(ctx, key, pkeylen); -}