diff options
Diffstat (limited to 'lib/dns/opensslrsa_link.c')
| -rw-r--r-- | lib/dns/opensslrsa_link.c | 1816 |
1 files changed, 1816 insertions, 0 deletions
diff --git a/lib/dns/opensslrsa_link.c b/lib/dns/opensslrsa_link.c new file mode 100644 index 0000000..dc7382c --- /dev/null +++ b/lib/dns/opensslrsa_link.c @@ -0,0 +1,1816 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file */ + +#include <inttypes.h> +#include <stdbool.h> + +#include <openssl/bn.h> +#include <openssl/opensslv.h> +#if OPENSSL_VERSION_NUMBER >= 0x30000000L && OPENSSL_API_LEVEL >= 30000 +#include <openssl/core_names.h> +#endif +#if !defined(OPENSSL_NO_ENGINE) && OPENSSL_API_LEVEL < 30000 +#include <openssl/engine.h> +#endif /* if !defined(OPENSSL_NO_ENGINE) && OPENSSL_API_LEVEL < 30000 */ +#include <openssl/err.h> +#include <openssl/objects.h> +#if OPENSSL_VERSION_NUMBER >= 0x30000000L && OPENSSL_API_LEVEL >= 30000 +#include <openssl/param_build.h> +#endif +#include <openssl/rsa.h> + +#include <isc/mem.h> +#include <isc/result.h> +#include <isc/safe.h> +#include <isc/string.h> +#include <isc/util.h> + +#include "dst_internal.h" +#include "dst_openssl.h" +#include "dst_parse.h" +#include "openssl_shim.h" + +#define DST_RET(a) \ + { \ + ret = a; \ + goto err; \ + } + +static isc_result_t +opensslrsa_createctx(dst_key_t *key, dst_context_t *dctx) { + EVP_MD_CTX *evp_md_ctx; + const EVP_MD *type = NULL; + + UNUSED(key); + REQUIRE(dctx != NULL && dctx->key != NULL); + REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 || + dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 || + dctx->key->key_alg == DST_ALG_RSASHA256 || + dctx->key->key_alg == DST_ALG_RSASHA512); + + /* + * Reject incorrect RSA key lengths. + */ + switch (dctx->key->key_alg) { + case DST_ALG_RSASHA1: + case DST_ALG_NSEC3RSASHA1: + /* From RFC 3110 */ + if (dctx->key->key_size > 4096) { + return (ISC_R_FAILURE); + } + break; + case DST_ALG_RSASHA256: + /* From RFC 5702 */ + if (dctx->key->key_size < 512 || dctx->key->key_size > 4096) { + return (ISC_R_FAILURE); + } + break; + case DST_ALG_RSASHA512: + /* From RFC 5702 */ + if (dctx->key->key_size < 1024 || dctx->key->key_size > 4096) { + return (ISC_R_FAILURE); + } + break; + default: + UNREACHABLE(); + } + + evp_md_ctx = EVP_MD_CTX_create(); + if (evp_md_ctx == NULL) { + return (dst__openssl_toresult(ISC_R_NOMEMORY)); + } + + switch (dctx->key->key_alg) { + case DST_ALG_RSASHA1: + case DST_ALG_NSEC3RSASHA1: + type = EVP_sha1(); /* SHA1 + RSA */ + break; + case DST_ALG_RSASHA256: + type = EVP_sha256(); /* SHA256 + RSA */ + break; + case DST_ALG_RSASHA512: + type = EVP_sha512(); + break; + default: + UNREACHABLE(); + } + + if (!EVP_DigestInit_ex(evp_md_ctx, type, NULL)) { + EVP_MD_CTX_destroy(evp_md_ctx); + return (dst__openssl_toresult3( + dctx->category, "EVP_DigestInit_ex", ISC_R_FAILURE)); + } + dctx->ctxdata.evp_md_ctx = evp_md_ctx; + + return (ISC_R_SUCCESS); +} + +static void +opensslrsa_destroyctx(dst_context_t *dctx) { + EVP_MD_CTX *evp_md_ctx = NULL; + + REQUIRE(dctx != NULL && dctx->key != NULL); + REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 || + dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 || + dctx->key->key_alg == DST_ALG_RSASHA256 || + dctx->key->key_alg == DST_ALG_RSASHA512); + + evp_md_ctx = dctx->ctxdata.evp_md_ctx; + + if (evp_md_ctx != NULL) { + EVP_MD_CTX_destroy(evp_md_ctx); + dctx->ctxdata.evp_md_ctx = NULL; + } +} + +static isc_result_t +opensslrsa_adddata(dst_context_t *dctx, const isc_region_t *data) { + EVP_MD_CTX *evp_md_ctx = NULL; + + REQUIRE(dctx != NULL && dctx->key != NULL); + REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 || + dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 || + dctx->key->key_alg == DST_ALG_RSASHA256 || + dctx->key->key_alg == DST_ALG_RSASHA512); + + evp_md_ctx = dctx->ctxdata.evp_md_ctx; + + if (!EVP_DigestUpdate(evp_md_ctx, data->base, data->length)) { + return (dst__openssl_toresult3( + dctx->category, "EVP_DigestUpdate", ISC_R_FAILURE)); + } + return (ISC_R_SUCCESS); +} + +static isc_result_t +opensslrsa_sign(dst_context_t *dctx, isc_buffer_t *sig) { + dst_key_t *key = NULL; + isc_region_t r; + unsigned int siglen = 0; + EVP_MD_CTX *evp_md_ctx = NULL; + EVP_PKEY *pkey = NULL; + + REQUIRE(dctx != NULL && dctx->key != NULL); + REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 || + dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 || + dctx->key->key_alg == DST_ALG_RSASHA256 || + dctx->key->key_alg == DST_ALG_RSASHA512); + + key = dctx->key; + evp_md_ctx = dctx->ctxdata.evp_md_ctx; + pkey = key->keydata.pkey; + + isc_buffer_availableregion(sig, &r); + + if (r.length < (unsigned int)EVP_PKEY_size(pkey)) { + return (ISC_R_NOSPACE); + } + + if (!EVP_SignFinal(evp_md_ctx, r.base, &siglen, pkey)) { + return (dst__openssl_toresult3(dctx->category, "EVP_SignFinal", + ISC_R_FAILURE)); + } + + isc_buffer_add(sig, siglen); + + return (ISC_R_SUCCESS); +} + +static isc_result_t +opensslrsa_verify2(dst_context_t *dctx, int maxbits, const isc_region_t *sig) { + dst_key_t *key = NULL; + int status = 0; +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA *rsa; + const BIGNUM *e = NULL; +#else + BIGNUM *e = NULL; +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + EVP_MD_CTX *evp_md_ctx = NULL; + EVP_PKEY *pkey = NULL; + int bits; + + REQUIRE(dctx != NULL && dctx->key != NULL); + REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 || + dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 || + dctx->key->key_alg == DST_ALG_RSASHA256 || + dctx->key->key_alg == DST_ALG_RSASHA512); + + key = dctx->key; + evp_md_ctx = dctx->ctxdata.evp_md_ctx; + pkey = key->keydata.pkey; + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + rsa = EVP_PKEY_get1_RSA(pkey); + if (rsa == NULL) { + return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + RSA_get0_key(rsa, NULL, &e, NULL); + if (e == NULL) { + RSA_free(rsa); + return (dst__openssl_toresult(DST_R_VERIFYFAILURE)); + } + bits = BN_num_bits(e); + RSA_free(rsa); +#else + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_E, &e); + if (e == NULL) { + return (dst__openssl_toresult(DST_R_VERIFYFAILURE)); + } + bits = BN_num_bits(e); + BN_free(e); +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + if (bits > maxbits && maxbits != 0) { + return (DST_R_VERIFYFAILURE); + } + + status = EVP_VerifyFinal(evp_md_ctx, sig->base, sig->length, pkey); + switch (status) { + case 1: + return (ISC_R_SUCCESS); + case 0: + return (dst__openssl_toresult(DST_R_VERIFYFAILURE)); + default: + return (dst__openssl_toresult3(dctx->category, + "EVP_VerifyFinal", + DST_R_VERIFYFAILURE)); + } +} + +static isc_result_t +opensslrsa_verify(dst_context_t *dctx, const isc_region_t *sig) { + return (opensslrsa_verify2(dctx, 0, sig)); +} + +static bool +opensslrsa_compare(const dst_key_t *key1, const dst_key_t *key2) { + bool ret; + int status; + EVP_PKEY *pkey1 = key1->keydata.pkey; + EVP_PKEY *pkey2 = key2->keydata.pkey; +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA *rsa1 = NULL; + RSA *rsa2 = NULL; + const BIGNUM *d1 = NULL, *d2 = NULL; + const BIGNUM *p1 = NULL, *p2 = NULL; + const BIGNUM *q1 = NULL, *q2 = NULL; +#else + BIGNUM *d1 = NULL, *d2 = NULL; + BIGNUM *p1 = NULL, *p2 = NULL; + BIGNUM *q1 = NULL, *q2 = NULL; +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + if (pkey1 == NULL && pkey2 == NULL) { + return (true); + } else if (pkey1 == NULL || pkey2 == NULL) { + return (false); + } + + /* `EVP_PKEY_eq` checks only the public key components and paramters. */ + status = EVP_PKEY_eq(pkey1, pkey2); + if (status != 1) { + DST_RET(false); + } + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + rsa1 = EVP_PKEY_get1_RSA(pkey1); + rsa2 = EVP_PKEY_get1_RSA(pkey2); + if (rsa1 == NULL && rsa2 == NULL) { + DST_RET(true); + } else if (rsa1 == NULL || rsa2 == NULL) { + DST_RET(false); + } + RSA_get0_key(rsa1, NULL, NULL, &d1); + RSA_get0_key(rsa2, NULL, NULL, &d2); +#else + EVP_PKEY_get_bn_param(pkey1, OSSL_PKEY_PARAM_RSA_D, &d1); + EVP_PKEY_get_bn_param(pkey2, OSSL_PKEY_PARAM_RSA_D, &d2); + ERR_clear_error(); +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + if (d1 != NULL || d2 != NULL) { + if (d1 == NULL || d2 == NULL) { + DST_RET(false); + } + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA_get0_factors(rsa1, &p1, &q1); + RSA_get0_factors(rsa2, &p2, &q2); +#else + EVP_PKEY_get_bn_param(pkey1, OSSL_PKEY_PARAM_RSA_FACTOR1, &p1); + EVP_PKEY_get_bn_param(pkey1, OSSL_PKEY_PARAM_RSA_FACTOR2, &q1); + EVP_PKEY_get_bn_param(pkey2, OSSL_PKEY_PARAM_RSA_FACTOR1, &p2); + EVP_PKEY_get_bn_param(pkey2, OSSL_PKEY_PARAM_RSA_FACTOR2, &q2); + ERR_clear_error(); +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + if (BN_cmp(d1, d2) != 0 || BN_cmp(p1, p2) != 0 || + BN_cmp(q1, q2) != 0) + { + DST_RET(false); + } + } + + ret = true; + +err: +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + if (rsa1 != NULL) { + RSA_free(rsa1); + } + if (rsa2 != NULL) { + RSA_free(rsa2); + } +#else + if (d1 != NULL) { + BN_clear_free(d1); + } + if (d2 != NULL) { + BN_clear_free(d2); + } + if (p1 != NULL) { + BN_clear_free(p1); + } + if (p2 != NULL) { + BN_clear_free(p2); + } + if (q1 != NULL) { + BN_clear_free(q1); + } + if (q2 != NULL) { + BN_clear_free(q2); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + return (ret); +} + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 +static int +progress_cb(int p, int n, BN_GENCB *cb) { + union { + void *dptr; + void (*fptr)(int); + } u; + + UNUSED(n); + + u.dptr = BN_GENCB_get_arg(cb); + if (u.fptr != NULL) { + u.fptr(p); + } + return (1); +} +#else +static int +progress_cb(EVP_PKEY_CTX *ctx) { + union { + void *dptr; + void (*fptr)(int); + } u; + + u.dptr = EVP_PKEY_CTX_get_app_data(ctx); + if (u.fptr != NULL) { + int p = EVP_PKEY_CTX_get_keygen_info(ctx, 0); + u.fptr(p); + } + return (1); +} +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + +static isc_result_t +opensslrsa_generate(dst_key_t *key, int exp, void (*callback)(int)) { + isc_result_t ret; + union { + void *dptr; + void (*fptr)(int); + } u; + BIGNUM *e = BN_new(); +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA *rsa = RSA_new(); + EVP_PKEY *pkey = EVP_PKEY_new(); +#if !HAVE_BN_GENCB_NEW + BN_GENCB _cb; +#endif /* !HAVE_BN_GENCB_NEW */ + BN_GENCB *cb = BN_GENCB_new(); +#else + EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new_from_name(NULL, "RSA", NULL); + EVP_PKEY *pkey = NULL; +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + if (e == NULL || rsa == NULL || pkey == NULL || cb == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } +#else + if (e == NULL || ctx == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + /* + * Reject incorrect RSA key lengths. + */ + switch (key->key_alg) { + case DST_ALG_RSASHA1: + case DST_ALG_NSEC3RSASHA1: + /* From RFC 3110 */ + if (key->key_size > 4096) { + DST_RET(DST_R_INVALIDPARAM); + } + break; + case DST_ALG_RSASHA256: + /* From RFC 5702 */ + if (key->key_size < 512 || key->key_size > 4096) { + DST_RET(DST_R_INVALIDPARAM); + } + break; + case DST_ALG_RSASHA512: + /* From RFC 5702 */ + if (key->key_size < 1024 || key->key_size > 4096) { + DST_RET(DST_R_INVALIDPARAM); + } + break; + default: + UNREACHABLE(); + } + + if (exp == 0) { + /* RSA_F4 0x10001 */ + BN_set_bit(e, 0); + BN_set_bit(e, 16); + } else { + /* (phased-out) F5 0x100000001 */ + BN_set_bit(e, 0); + BN_set_bit(e, 32); + } + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + if (EVP_PKEY_set1_RSA(pkey, rsa) != 1) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + if (callback == NULL) { + BN_GENCB_set_old(cb, NULL, NULL); + } else { + u.fptr = callback; + BN_GENCB_set(cb, progress_cb, u.dptr); + } + + if (RSA_generate_key_ex(rsa, key->key_size, e, cb) != 1) { + DST_RET(dst__openssl_toresult2("RSA_generate_key_ex", + DST_R_OPENSSLFAILURE)); + } +#else + if (EVP_PKEY_keygen_init(ctx) != 1) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + if (EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, (int)key->key_size) != 1) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + if (EVP_PKEY_CTX_set1_rsa_keygen_pubexp(ctx, e) != 1) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + if (callback != NULL) { + u.fptr = callback; + EVP_PKEY_CTX_set_app_data(ctx, u.dptr); + EVP_PKEY_CTX_set_cb(ctx, progress_cb); + } + + if (EVP_PKEY_keygen(ctx, &pkey) != 1 || pkey == NULL) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_keygen", + DST_R_OPENSSLFAILURE)); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + key->keydata.pkey = pkey; + pkey = NULL; + ret = ISC_R_SUCCESS; + +err: + if (pkey != NULL) { + EVP_PKEY_free(pkey); + } +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + if (rsa != NULL) { + RSA_free(rsa); + } + if (cb != NULL) { + BN_GENCB_free(cb); + } +#else + if (ctx != NULL) { + EVP_PKEY_CTX_free(ctx); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + if (e != NULL) { + BN_free(e); + } + return (ret); +} + +static bool +opensslrsa_isprivate(const dst_key_t *key) { + bool ret; + EVP_PKEY *pkey; +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA *rsa; + const BIGNUM *d = NULL; +#else + BIGNUM *d = NULL; +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + REQUIRE(key->key_alg == DST_ALG_RSASHA1 || + key->key_alg == DST_ALG_NSEC3RSASHA1 || + key->key_alg == DST_ALG_RSASHA256 || + key->key_alg == DST_ALG_RSASHA512); + + pkey = key->keydata.pkey; + if (pkey == NULL) { + return (false); + } + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + rsa = EVP_PKEY_get1_RSA(pkey); + INSIST(rsa != NULL); + + if (RSA_test_flags(rsa, RSA_FLAG_EXT_PKEY) != 0) { + ret = true; + } else { + RSA_get0_key(rsa, NULL, NULL, &d); + ret = (d != NULL); + } + RSA_free(rsa); +#else + ret = (EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_D, &d) == 1 && + d != NULL); + if (d != NULL) { + BN_clear_free(d); + } else { + ERR_clear_error(); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + return (ret); +} + +static void +opensslrsa_destroy(dst_key_t *key) { + EVP_PKEY *pkey = key->keydata.pkey; + + if (pkey != NULL) { + EVP_PKEY_free(pkey); + key->keydata.pkey = NULL; + } +} + +static isc_result_t +opensslrsa_todns(const dst_key_t *key, isc_buffer_t *data) { + isc_region_t r; + unsigned int e_bytes; + unsigned int mod_bytes; + isc_result_t ret; + EVP_PKEY *pkey; +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA *rsa; + const BIGNUM *e = NULL, *n = NULL; +#else + BIGNUM *e = NULL, *n = NULL; +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + REQUIRE(key->keydata.pkey != NULL); + + pkey = key->keydata.pkey; + isc_buffer_availableregion(data, &r); + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + rsa = EVP_PKEY_get1_RSA(pkey); + if (rsa == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + RSA_get0_key(rsa, &n, &e, NULL); +#else + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_E, &e); + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_N, &n); +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + if (e == NULL || n == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + mod_bytes = BN_num_bytes(n); + e_bytes = BN_num_bytes(e); + + if (e_bytes < 256) { /*%< key exponent is <= 2040 bits */ + if (r.length < 1) { + DST_RET(ISC_R_NOSPACE); + } + isc_buffer_putuint8(data, (uint8_t)e_bytes); + isc_region_consume(&r, 1); + } else { + if (r.length < 3) { + DST_RET(ISC_R_NOSPACE); + } + isc_buffer_putuint8(data, 0); + isc_buffer_putuint16(data, (uint16_t)e_bytes); + isc_region_consume(&r, 3); + } + + if (r.length < e_bytes + mod_bytes) { + DST_RET(ISC_R_NOSPACE); + } + + BN_bn2bin(e, r.base); + isc_region_consume(&r, e_bytes); + BN_bn2bin(n, r.base); + isc_region_consume(&r, mod_bytes); + + isc_buffer_add(data, e_bytes + mod_bytes); + + ret = ISC_R_SUCCESS; +err: +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + if (rsa != NULL) { + RSA_free(rsa); + } +#else + if (e != NULL) { + BN_free(e); + } + if (n != NULL) { + BN_free(n); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + return (ret); +} + +static isc_result_t +opensslrsa_fromdns(dst_key_t *key, isc_buffer_t *data) { + isc_result_t ret; + int status; + isc_region_t r; + unsigned int e_bytes; + unsigned int length; +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA *rsa = NULL; +#else + OSSL_PARAM_BLD *bld = NULL; + OSSL_PARAM *params = NULL; + EVP_PKEY_CTX *ctx = NULL; +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + EVP_PKEY *pkey = NULL; + BIGNUM *e = NULL, *n = NULL; + + REQUIRE(key->key_alg == DST_ALG_RSASHA1 || + key->key_alg == DST_ALG_NSEC3RSASHA1 || + key->key_alg == DST_ALG_RSASHA256 || + key->key_alg == DST_ALG_RSASHA512); + + isc_buffer_remainingregion(data, &r); + if (r.length == 0) { + DST_RET(ISC_R_SUCCESS); + } + length = r.length; + if (r.length < 1) { + DST_RET(DST_R_INVALIDPUBLICKEY); + } + + e_bytes = *r.base; + isc_region_consume(&r, 1); + + if (e_bytes == 0) { + if (r.length < 2) { + DST_RET(DST_R_INVALIDPUBLICKEY); + } + e_bytes = (*r.base) << 8; + isc_region_consume(&r, 1); + e_bytes += *r.base; + isc_region_consume(&r, 1); + } + + if (r.length < e_bytes) { + DST_RET(DST_R_INVALIDPUBLICKEY); + } + e = BN_bin2bn(r.base, e_bytes, NULL); + isc_region_consume(&r, e_bytes); + n = BN_bin2bn(r.base, r.length, NULL); + if (e == NULL || n == NULL) { + DST_RET(ISC_R_NOMEMORY); + } + + key->key_size = BN_num_bits(n); + + isc_buffer_forward(data, length); + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + rsa = RSA_new(); + if (rsa == NULL) { + DST_RET(dst__openssl_toresult2("RSA_new", + DST_R_OPENSSLFAILURE)); + } + status = RSA_set0_key(rsa, n, e, NULL); + if (status != 1) { + DST_RET(dst__openssl_toresult2("RSA_set0_key", + DST_R_OPENSSLFAILURE)); + } + + /* These are now managed by OpenSSL. */ + n = NULL; + e = NULL; + + pkey = EVP_PKEY_new(); + if (pkey == NULL) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_new", + DST_R_OPENSSLFAILURE)); + } + status = EVP_PKEY_set1_RSA(pkey, rsa); + if (status != 1) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_set1_RSA", + DST_R_OPENSSLFAILURE)); + } +#else + bld = OSSL_PARAM_BLD_new(); + if (bld == NULL) { + DST_RET(dst__openssl_toresult2("OSSL_PARAM_BLD_new", + DST_R_OPENSSLFAILURE)); + } + if (OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_N, n) != 1 || + OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_E, e) != 1) + { + DST_RET(dst__openssl_toresult2("OSSL_PARAM_BLD_push_BN", + DST_R_OPENSSLFAILURE)); + } + params = OSSL_PARAM_BLD_to_param(bld); + if (params == NULL) { + DST_RET(dst__openssl_toresult2("OSSL_PARAM_BLD_to_param", + DST_R_OPENSSLFAILURE)); + } + ctx = EVP_PKEY_CTX_new_from_name(NULL, "RSA", NULL); + if (ctx == NULL) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_CTX_new_from_name", + DST_R_OPENSSLFAILURE)); + } + status = EVP_PKEY_fromdata_init(ctx); + if (status != 1) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_fromdata_init", + DST_R_OPENSSLFAILURE)); + } + status = EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_PUBLIC_KEY, params); + if (status != 1 || pkey == NULL) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_fromdata", + DST_R_OPENSSLFAILURE)); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + key->keydata.pkey = pkey; + pkey = NULL; + ret = ISC_R_SUCCESS; + +err: + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + if (rsa != NULL) { + RSA_free(rsa); + } +#else + if (ctx != NULL) { + EVP_PKEY_CTX_free(ctx); + } + if (params != NULL) { + OSSL_PARAM_free(params); + } + if (bld != NULL) { + OSSL_PARAM_BLD_free(bld); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + if (n != NULL) { + BN_free(n); + } + if (e != NULL) { + BN_free(e); + } + if (pkey != NULL) { + EVP_PKEY_free(pkey); + } + + return (ret); +} + +static isc_result_t +opensslrsa_tofile(const dst_key_t *key, const char *directory) { + isc_result_t ret; + dst_private_t priv = { 0 }; + unsigned char *bufs[8] = { NULL }; + unsigned short i = 0; + EVP_PKEY *pkey; +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA *rsa = NULL; + const BIGNUM *n = NULL, *e = NULL, *d = NULL; + const BIGNUM *p = NULL, *q = NULL; + const BIGNUM *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL; +#else + BIGNUM *n = NULL, *e = NULL, *d = NULL; + BIGNUM *p = NULL, *q = NULL; + BIGNUM *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL; +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + if (key->keydata.pkey == NULL) { + DST_RET(DST_R_NULLKEY); + } + + if (key->external) { + return (dst__privstruct_writefile(key, &priv, directory)); + } + + pkey = key->keydata.pkey; +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + rsa = EVP_PKEY_get1_RSA(pkey); + if (rsa == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + RSA_get0_key(rsa, &n, &e, &d); + RSA_get0_factors(rsa, &p, &q); + RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp); +#else + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_N, &n); + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_E, &e); + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_D, &d); + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_FACTOR1, &p); + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_FACTOR2, &q); + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_EXPONENT1, &dmp1); + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_EXPONENT2, &dmq1); + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_COEFFICIENT1, &iqmp); + ERR_clear_error(); +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + if (n == NULL || e == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + priv.elements[i].tag = TAG_RSA_MODULUS; + priv.elements[i].length = BN_num_bytes(n); + bufs[i] = isc_mem_get(key->mctx, priv.elements[i].length); + BN_bn2bin(n, bufs[i]); + priv.elements[i].data = bufs[i]; + i++; + + priv.elements[i].tag = TAG_RSA_PUBLICEXPONENT; + priv.elements[i].length = BN_num_bytes(e); + bufs[i] = isc_mem_get(key->mctx, priv.elements[i].length); + BN_bn2bin(e, bufs[i]); + priv.elements[i].data = bufs[i]; + i++; + + if (d != NULL) { + priv.elements[i].tag = TAG_RSA_PRIVATEEXPONENT; + priv.elements[i].length = BN_num_bytes(d); + INSIST(i < ARRAY_SIZE(bufs)); + bufs[i] = isc_mem_get(key->mctx, priv.elements[i].length); + BN_bn2bin(d, bufs[i]); + priv.elements[i].data = bufs[i]; + i++; + } + + if (p != NULL) { + priv.elements[i].tag = TAG_RSA_PRIME1; + priv.elements[i].length = BN_num_bytes(p); + INSIST(i < ARRAY_SIZE(bufs)); + bufs[i] = isc_mem_get(key->mctx, priv.elements[i].length); + BN_bn2bin(p, bufs[i]); + priv.elements[i].data = bufs[i]; + i++; + } + + if (q != NULL) { + priv.elements[i].tag = TAG_RSA_PRIME2; + priv.elements[i].length = BN_num_bytes(q); + INSIST(i < ARRAY_SIZE(bufs)); + bufs[i] = isc_mem_get(key->mctx, priv.elements[i].length); + BN_bn2bin(q, bufs[i]); + priv.elements[i].data = bufs[i]; + i++; + } + + if (dmp1 != NULL) { + priv.elements[i].tag = TAG_RSA_EXPONENT1; + priv.elements[i].length = BN_num_bytes(dmp1); + INSIST(i < ARRAY_SIZE(bufs)); + bufs[i] = isc_mem_get(key->mctx, priv.elements[i].length); + BN_bn2bin(dmp1, bufs[i]); + priv.elements[i].data = bufs[i]; + i++; + } + + if (dmq1 != NULL) { + priv.elements[i].tag = TAG_RSA_EXPONENT2; + priv.elements[i].length = BN_num_bytes(dmq1); + INSIST(i < ARRAY_SIZE(bufs)); + bufs[i] = isc_mem_get(key->mctx, priv.elements[i].length); + BN_bn2bin(dmq1, bufs[i]); + priv.elements[i].data = bufs[i]; + i++; + } + + if (iqmp != NULL) { + priv.elements[i].tag = TAG_RSA_COEFFICIENT; + priv.elements[i].length = BN_num_bytes(iqmp); + INSIST(i < ARRAY_SIZE(bufs)); + bufs[i] = isc_mem_get(key->mctx, priv.elements[i].length); + BN_bn2bin(iqmp, bufs[i]); + priv.elements[i].data = bufs[i]; + i++; + } + + if (key->engine != NULL) { + priv.elements[i].tag = TAG_RSA_ENGINE; + priv.elements[i].length = (unsigned short)strlen(key->engine) + + 1; + priv.elements[i].data = (unsigned char *)key->engine; + i++; + } + + if (key->label != NULL) { + priv.elements[i].tag = TAG_RSA_LABEL; + priv.elements[i].length = (unsigned short)strlen(key->label) + + 1; + priv.elements[i].data = (unsigned char *)key->label; + i++; + } + + priv.nelements = i; + ret = dst__privstruct_writefile(key, &priv, directory); + +err: + for (i = 0; i < ARRAY_SIZE(bufs); i++) { + if (bufs[i] != NULL) { + isc_mem_put(key->mctx, bufs[i], + priv.elements[i].length); + } + } +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA_free(rsa); +#else + if (n != NULL) { + BN_free(n); + } + if (e != NULL) { + BN_free(e); + } + if (d != NULL) { + BN_clear_free(d); + } + if (p != NULL) { + BN_clear_free(p); + } + if (q != NULL) { + BN_clear_free(q); + } + if (dmp1 != NULL) { + BN_clear_free(dmp1); + } + if (dmq1 != NULL) { + BN_clear_free(dmq1); + } + if (iqmp != NULL) { + BN_clear_free(iqmp); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + return (ret); +} + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 +static isc_result_t +rsa_check(RSA *rsa, RSA *pub) { + const BIGNUM *n1 = NULL, *n2 = NULL; + const BIGNUM *e1 = NULL, *e2 = NULL; + BIGNUM *n = NULL, *e = NULL; + + /* + * Public parameters should be the same but if they are not set + * copy them from the public key. + */ + if (pub != NULL) { + RSA_get0_key(rsa, &n1, &e1, NULL); + RSA_get0_key(pub, &n2, &e2, NULL); + if (n1 != NULL) { + if (BN_cmp(n1, n2) != 0) { + return (DST_R_INVALIDPRIVATEKEY); + } + } else { + n = BN_dup(n2); + if (n == NULL) { + return (ISC_R_NOMEMORY); + } + } + if (e1 != NULL) { + if (BN_cmp(e1, e2) != 0) { + if (n != NULL) { + BN_free(n); + } + return (DST_R_INVALIDPRIVATEKEY); + } + } else { + e = BN_dup(e2); + if (e == NULL) { + if (n != NULL) { + BN_free(n); + } + return (ISC_R_NOMEMORY); + } + } + if (RSA_set0_key(rsa, n, e, NULL) == 0) { + if (n != NULL) { + BN_free(n); + } + if (e != NULL) { + BN_free(e); + } + } + } + + RSA_get0_key(rsa, &n1, &e1, NULL); + if (n1 == NULL || e1 == NULL) { + return (DST_R_INVALIDPRIVATEKEY); + } + + return (ISC_R_SUCCESS); +} +#else +static isc_result_t +rsa_check(EVP_PKEY *pkey, EVP_PKEY *pubpkey) { + isc_result_t ret = ISC_R_FAILURE; + int status; + BIGNUM *n1 = NULL, *n2 = NULL; + BIGNUM *e1 = NULL, *e2 = NULL; + + /* Try to get the public key from pkey. */ + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_N, &n1); + EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_E, &e1); + + /* Check if `pubpkey` exists and that we can extract its public key. */ + if (pubpkey == NULL || + EVP_PKEY_get_bn_param(pubpkey, OSSL_PKEY_PARAM_RSA_N, &n2) != 1 || + n2 == NULL || + EVP_PKEY_get_bn_param(pubpkey, OSSL_PKEY_PARAM_RSA_E, &e2) != 1 || + e2 == NULL) + { + if (n1 == NULL || e1 == NULL) { + /* No public key both in `pkey` and in `pubpkey`. */ + DST_RET(DST_R_INVALIDPRIVATEKEY); + } else { + /* + * `pkey` has a public key, but there is no public key + * in `pubpkey` to check against. + */ + DST_RET(ISC_R_SUCCESS); + } + } + + /* + * If `pkey` doesn't have a public key then we will copy it from + * `pubpkey`. + */ + if (n1 == NULL || e1 == NULL) { + status = EVP_PKEY_set_bn_param(pkey, OSSL_PKEY_PARAM_RSA_N, n2); + if (status != 1) { + DST_RET(ISC_R_FAILURE); + } + + status = EVP_PKEY_set_bn_param(pkey, OSSL_PKEY_PARAM_RSA_E, e2); + if (status != 1) { + DST_RET(ISC_R_FAILURE); + } + } + + if (EVP_PKEY_eq(pkey, pubpkey) == 1) { + DST_RET(ISC_R_SUCCESS); + } + +err: + if (n1 != NULL) { + BN_free(n1); + } + if (n2 != NULL) { + BN_free(n2); + } + if (e1 != NULL) { + BN_free(e1); + } + if (e2 != NULL) { + BN_free(e2); + } + + return (ret); +} +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + +static isc_result_t +opensslrsa_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) { + dst_private_t priv; + isc_result_t ret; + int i; +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA *rsa = NULL, *pubrsa = NULL; +#else + OSSL_PARAM_BLD *bld = NULL; + OSSL_PARAM *params = NULL; + EVP_PKEY_CTX *ctx = NULL; +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ +#if !defined(OPENSSL_NO_ENGINE) && OPENSSL_API_LEVEL < 30000 + const BIGNUM *ex = NULL; + ENGINE *ep = NULL; +#endif /* if !defined(OPENSSL_NO_ENGINE) && OPENSSL_API_LEVEL < 30000 */ + isc_mem_t *mctx = NULL; + const char *engine = NULL, *label = NULL; + EVP_PKEY *pkey = NULL; + BIGNUM *n = NULL, *e = NULL, *d = NULL; + BIGNUM *p = NULL, *q = NULL; + BIGNUM *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL; + + REQUIRE(key != NULL); + REQUIRE(key->key_alg == DST_ALG_RSASHA1 || + key->key_alg == DST_ALG_NSEC3RSASHA1 || + key->key_alg == DST_ALG_RSASHA256 || + key->key_alg == DST_ALG_RSASHA512); + + mctx = key->mctx; + + /* read private key file */ + ret = dst__privstruct_parse(key, DST_ALG_RSA, lexer, mctx, &priv); + if (ret != ISC_R_SUCCESS) { + goto err; + } + + if (key->external) { + if (priv.nelements != 0 || pub == NULL) { + DST_RET(DST_R_INVALIDPRIVATEKEY); + } + key->keydata.pkey = pub->keydata.pkey; + pub->keydata.pkey = NULL; + key->key_size = pub->key_size; + DST_RET(ISC_R_SUCCESS); + } + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + if (pub != NULL && pub->keydata.pkey != NULL) { + pubrsa = EVP_PKEY_get1_RSA(pub->keydata.pkey); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + for (i = 0; i < priv.nelements; i++) { + switch (priv.elements[i].tag) { + case TAG_RSA_ENGINE: + engine = (char *)priv.elements[i].data; + break; + case TAG_RSA_LABEL: + label = (char *)priv.elements[i].data; + break; + default: + break; + } + } + + /* + * Is this key stored in a HSM? + * See if we can fetch it. + */ + if (label != NULL) { +#if !defined(OPENSSL_NO_ENGINE) && OPENSSL_API_LEVEL < 30000 + if (engine == NULL) { + DST_RET(DST_R_NOENGINE); + } + ep = dst__openssl_getengine(engine); + if (ep == NULL) { + DST_RET(dst__openssl_toresult(DST_R_NOENGINE)); + } + pkey = ENGINE_load_private_key(ep, label, NULL, NULL); + if (pkey == NULL) { + DST_RET(dst__openssl_toresult2("ENGINE_load_private_" + "key", + ISC_R_NOTFOUND)); + } + key->engine = isc_mem_strdup(key->mctx, engine); + key->label = isc_mem_strdup(key->mctx, label); + + rsa = EVP_PKEY_get1_RSA(pkey); + if (rsa == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS) { + DST_RET(dst__openssl_toresult(DST_R_INVALIDPRIVATEKEY)); + } + RSA_get0_key(rsa, NULL, &ex, NULL); + + if (ex == NULL) { + DST_RET(dst__openssl_toresult(DST_R_INVALIDPRIVATEKEY)); + } + if (BN_num_bits(ex) > RSA_MAX_PUBEXP_BITS) { + DST_RET(ISC_R_RANGE); + } + + key->key_size = EVP_PKEY_bits(pkey); + key->keydata.pkey = pkey; + pkey = NULL; + DST_RET(ISC_R_SUCCESS); +#else /* if !defined(OPENSSL_NO_ENGINE) && OPENSSL_API_LEVEL < 30000 */ + UNUSED(engine); + DST_RET(DST_R_NOENGINE); +#endif /* if !defined(OPENSSL_NO_ENGINE) && OPENSSL_API_LEVEL < 30000 */ + } + + for (i = 0; i < priv.nelements; i++) { + BIGNUM *bn; + switch (priv.elements[i].tag) { + case TAG_RSA_ENGINE: + continue; + case TAG_RSA_LABEL: + continue; + default: + bn = BN_bin2bn(priv.elements[i].data, + priv.elements[i].length, NULL); + if (bn == NULL) { + DST_RET(ISC_R_NOMEMORY); + } + switch (priv.elements[i].tag) { + case TAG_RSA_MODULUS: + n = bn; + break; + case TAG_RSA_PUBLICEXPONENT: + e = bn; + break; + case TAG_RSA_PRIVATEEXPONENT: + d = bn; + break; + case TAG_RSA_PRIME1: + p = bn; + break; + case TAG_RSA_PRIME2: + q = bn; + break; + case TAG_RSA_EXPONENT1: + dmp1 = bn; + break; + case TAG_RSA_EXPONENT2: + dmq1 = bn; + break; + case TAG_RSA_COEFFICIENT: + iqmp = bn; + break; + default: + BN_clear_free(bn); + } + } + } + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + rsa = RSA_new(); + if (rsa == NULL) { + DST_RET(ISC_R_NOMEMORY); + } + pkey = EVP_PKEY_new(); + if (pkey == NULL) { + DST_RET(ISC_R_NOMEMORY); + } + if (EVP_PKEY_set1_RSA(pkey, rsa) != 1) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + if (RSA_set0_key(rsa, n, e, d) == 0) { + if (n != NULL) { + BN_free(n); + } + if (e != NULL) { + BN_free(e); + } + if (d != NULL) { + BN_clear_free(d); + } + } + if (RSA_set0_factors(rsa, p, q) == 0) { + if (p != NULL) { + BN_clear_free(p); + } + if (q != NULL) { + BN_clear_free(q); + } + } + if (RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp) == 0) { + if (dmp1 != NULL) { + BN_clear_free(dmp1); + } + if (dmq1 != NULL) { + BN_clear_free(dmq1); + } + if (iqmp != NULL) { + BN_clear_free(iqmp); + } + } + if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS) { + DST_RET(dst__openssl_toresult(DST_R_INVALIDPRIVATEKEY)); + } +#else + bld = OSSL_PARAM_BLD_new(); + if (bld == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + if (n != NULL && + OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_N, n) != 1) + { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + if (e != NULL && + OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_E, e) != 1) + { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + if (d != NULL && + OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_D, d) != 1) + { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + if (p != NULL && + OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_FACTOR1, p) != 1) + { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + if (q != NULL && + OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_FACTOR2, q) != 1) + { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + if (dmp1 != NULL && + OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_EXPONENT1, dmp1) != + 1) + { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + if (dmq1 != NULL && + OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_EXPONENT2, dmq1) != + 1) + { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + if (iqmp != NULL && + OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_COEFFICIENT1, + iqmp) != 1) + { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + params = OSSL_PARAM_BLD_to_param(bld); + if (params == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + ctx = EVP_PKEY_CTX_new_from_name(NULL, "RSA", NULL); + if (ctx == NULL || EVP_PKEY_fromdata_init(ctx) != 1) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + if (EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_KEYPAIR, params) != 1 || + pkey == NULL) + { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + if (rsa_check(pkey, pub != NULL ? pub->keydata.pkey : NULL) != + ISC_R_SUCCESS) + { + DST_RET(dst__openssl_toresult(DST_R_INVALIDPRIVATEKEY)); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + + if (BN_num_bits(e) > RSA_MAX_PUBEXP_BITS) { + DST_RET(ISC_R_RANGE); + } + + key->key_size = BN_num_bits(n); + key->keydata.pkey = pkey; + pkey = NULL; + +err: + if (pkey != NULL) { + EVP_PKEY_free(pkey); + } +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + if (rsa != NULL) { + RSA_free(rsa); + } + if (pubrsa != NULL) { + RSA_free(pubrsa); + } +#else + if (ctx != NULL) { + EVP_PKEY_CTX_free(ctx); + } + if (params != NULL) { + OSSL_PARAM_free(params); + } + if (bld != NULL) { + OSSL_PARAM_BLD_free(bld); + } + if (e != NULL) { + BN_free(e); + } + if (n != NULL) { + BN_free(n); + } + if (d != NULL) { + BN_clear_free(d); + } + if (p != NULL) { + BN_clear_free(p); + } + if (q != NULL) { + BN_clear_free(q); + } + if (dmp1 != NULL) { + BN_clear_free(dmp1); + } + if (dmq1 != NULL) { + BN_clear_free(dmq1); + } + if (iqmp != NULL) { + BN_clear_free(iqmp); + } +#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 */ + if (ret != ISC_R_SUCCESS) { + key->keydata.generic = NULL; + } + + dst__privstruct_free(&priv, mctx); + isc_safe_memwipe(&priv, sizeof(priv)); + + return (ret); +} + +static isc_result_t +opensslrsa_fromlabel(dst_key_t *key, const char *engine, const char *label, + const char *pin) { +#if !defined(OPENSSL_NO_ENGINE) && OPENSSL_API_LEVEL < 30000 + ENGINE *e = NULL; + isc_result_t ret = ISC_R_SUCCESS; + EVP_PKEY *pkey = NULL, *pubpkey = NULL; + RSA *rsa = NULL, *pubrsa = NULL; + const BIGNUM *ex = NULL; + + UNUSED(pin); + + if (engine == NULL) { + DST_RET(DST_R_NOENGINE); + } + e = dst__openssl_getengine(engine); + if (e == NULL) { + DST_RET(dst__openssl_toresult(DST_R_NOENGINE)); + } + + pubpkey = ENGINE_load_public_key(e, label, NULL, NULL); + if (pubpkey == NULL) { + DST_RET(dst__openssl_toresult2("ENGINE_load_public_key", + DST_R_OPENSSLFAILURE)); + } + pubrsa = EVP_PKEY_get1_RSA(pubpkey); + if (pubrsa == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + + pkey = ENGINE_load_private_key(e, label, NULL, NULL); + if (pkey == NULL) { + DST_RET(dst__openssl_toresult2("ENGINE_load_private_key", + DST_R_OPENSSLFAILURE)); + } + + key->engine = isc_mem_strdup(key->mctx, engine); + key->label = isc_mem_strdup(key->mctx, label); + + rsa = EVP_PKEY_get1_RSA(pkey); + if (rsa == NULL) { + DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE)); + } + if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS) { + DST_RET(dst__openssl_toresult(DST_R_INVALIDPRIVATEKEY)); + } + RSA_get0_key(rsa, NULL, &ex, NULL); + + if (ex == NULL) { + DST_RET(dst__openssl_toresult(DST_R_INVALIDPRIVATEKEY)); + } + if (BN_num_bits(ex) > RSA_MAX_PUBEXP_BITS) { + DST_RET(ISC_R_RANGE); + } + + key->key_size = EVP_PKEY_bits(pkey); + key->keydata.pkey = pkey; + pkey = NULL; + +err: + if (rsa != NULL) { + RSA_free(rsa); + } + if (pubrsa != NULL) { + RSA_free(pubrsa); + } + if (pkey != NULL) { + EVP_PKEY_free(pkey); + } + if (pubpkey != NULL) { + EVP_PKEY_free(pubpkey); + } + return (ret); +#else /* if !defined(OPENSSL_NO_ENGINE) && OPENSSL_API_LEVEL < 30000 */ + UNUSED(key); + UNUSED(engine); + UNUSED(label); + UNUSED(pin); + return (DST_R_NOENGINE); +#endif /* if !defined(OPENSSL_NO_ENGINE) && OPENSSL_API_LEVEL < 30000 */ +} + +static dst_func_t opensslrsa_functions = { + opensslrsa_createctx, + NULL, /*%< createctx2 */ + opensslrsa_destroyctx, + opensslrsa_adddata, + opensslrsa_sign, + opensslrsa_verify, + opensslrsa_verify2, + NULL, /*%< computesecret */ + opensslrsa_compare, + NULL, /*%< paramcompare */ + opensslrsa_generate, + opensslrsa_isprivate, + opensslrsa_destroy, + opensslrsa_todns, + opensslrsa_fromdns, + opensslrsa_tofile, + opensslrsa_parse, + NULL, /*%< cleanup */ + opensslrsa_fromlabel, + NULL, /*%< dump */ + NULL, /*%< restore */ +}; + +/* + * An RSA public key with 2048 bits + */ +static const unsigned char e_bytes[] = "\x01\x00\x01"; +static const unsigned char n_bytes[] = + "\xc3\x90\x07\xbe\xf1\x85\xfc\x1a\x43\xb1\xa5\x15\xce\x71\x34\xfc\xc1" + "\x87\x27\x28\x38\xa4\xcf\x7c\x1a\x82\xa8\xdc\x04\x14\xd0\x3f\xb4\xfe" + "\x20\x4a\xdd\xd9\x0d\xd7\xcd\x61\x8c\xbd\x61\xa8\x10\xb5\x63\x1c\x29" + "\x15\xcb\x41\xee\x43\x91\x7f\xeb\xa5\x2c\xab\x81\x75\x0d\xa3\x3d\xe4" + "\xc8\x49\xb9\xca\x5a\x55\xa1\xbb\x09\xd1\xfb\xcd\xa2\xd2\x12\xa4\x85" + "\xdf\xa5\x65\xc9\x27\x2d\x8b\xd7\x8b\xfe\x6d\xc4\xd1\xd9\x83\x1c\x91" + "\x7d\x3d\xd0\xa4\xcd\xe1\xe7\xb9\x7a\x11\x38\xf9\x8b\x3c\xec\x30\xb6" + "\x36\xb9\x92\x64\x81\x56\x3c\xbc\xf9\x49\xfb\xba\x82\xb7\xa0\xfa\x65" + "\x79\x83\xb9\x4c\xa7\xfd\x53\x0b\x5a\xe4\xde\xf9\xfc\x38\x7e\xb5\x2c" + "\xa0\xc3\xb2\xfc\x7c\x38\xb0\x63\x50\xaf\x00\xaa\xb2\xad\x49\x54\x1e" + "\x8b\x11\x88\x9b\x6e\xae\x3b\x23\xa3\xdd\x53\x51\x80\x7a\x0b\x91\x4e" + "\x6d\x32\x01\xbd\x17\x81\x12\x64\x9f\x84\xae\x76\x53\x1a\x63\xa0\xda" + "\xcc\x45\x04\x72\xb0\xa7\xfb\xfa\x02\x39\x53\xc1\x83\x1f\x88\x54\x47" + "\x88\x63\x20\x71\x5d\xe2\xaa\x7c\x53\x39\x5e\x35\x25\xee\xe6\x5c\x15" + "\x5e\x14\xbe\x99\xde\x25\x19\xe7\x13\xdb\xce\xa3\xd3\x6c\x5c\xbb\x0e" + "\x6b"; + +static const unsigned char sha1_sig[] = + "\x69\x99\x89\x28\xe0\x38\x34\x91\x29\xb6\xac\x4b\xe9\x51\xbd\xbe\xc8" + "\x1a\x2d\xb6\xca\x99\xa3\x9f\x6a\x8b\x94\x5a\x51\x37\xd5\x8d\xae\x87" + "\xed\xbc\x8e\xb8\xa3\x60\x6b\xf6\xe6\x72\xfc\x26\x2a\x39\x2b\xfe\x88" + "\x1a\xa9\xd1\x93\xc7\xb9\xf8\xb6\x45\xa1\xf9\xa1\x56\x78\x7b\x00\xec" + "\x33\x83\xd4\x93\x25\x48\xb3\x50\x09\xd0\xbc\x7f\xac\x67\xc7\xa2\x7f" + "\xfc\xf6\x5a\xef\xf8\x5a\xad\x52\x74\xf5\x71\x34\xd9\x3d\x33\x8b\x4d" + "\x99\x64\x7e\x14\x59\xbe\xdf\x26\x8a\x67\x96\x6c\x1f\x79\x85\x10\x0d" + "\x7f\xd6\xa4\xba\x57\x41\x03\x71\x4e\x8c\x17\xd5\xc4\xfb\x4a\xbe\x66" + "\x45\x15\x45\x0c\x02\xe0\x10\xe1\xbb\x33\x8d\x90\x34\x3c\x94\xa4\x4c" + "\x7c\xd0\x5e\x90\x76\x80\x59\xb2\xfa\x54\xbf\xa9\x86\xb8\x84\x1e\x28" + "\x48\x60\x2f\x9e\xa4\xbc\xd4\x9c\x20\x27\x16\xac\x33\xcb\xcf\xab\x93" + "\x7a\x3b\x74\xa0\x18\x92\xa1\x4f\xfc\x52\x19\xee\x7a\x13\x73\xba\x36" + "\xaf\x78\x5d\xb6\x1f\x96\x76\x15\x73\xee\x04\xa8\x70\x27\xf7\xe7\xfa" + "\xe8\xf6\xc8\x5f\x4a\x81\x56\x0a\x94\xf3\xc6\x98\xd2\x93\xc4\x0b\x49" + "\x6b\x44\xd3\x73\xa2\xe3\xef\x5d\x9e\x68\xac\xa7\x42\xb1\xbb\x65\xbe" + "\x59"; + +static const unsigned char sha256_sig[] = + "\x0f\x8c\xdb\xe6\xb6\x21\xc8\xc5\x28\x76\x7d\xf6\xf2\x3b\x78\x47\x77" + "\x03\x34\xc5\x5e\xc0\xda\x42\x41\xc0\x0f\x97\xd3\xd0\x53\xa1\xd6\x87" + "\xe4\x16\x29\x9a\xa5\x59\xf4\x01\xad\xc9\x04\xe7\x61\xe2\xcb\x79\x73" + "\xce\xe0\xa6\x85\xe5\x10\x8c\x4b\xc5\x68\x3b\x96\x42\x3f\x56\xb3\x6d" + "\x89\xc4\xff\x72\x36\xf2\x3f\xed\xe9\xb8\xe3\xae\xab\x3c\xb7\xaa\xf7" + "\x1f\x8f\x26\x6b\xee\xc1\xac\x72\x89\x23\x8b\x7a\xd7\x8c\x84\xf3\xf5" + "\x97\xa8\x8d\xd3\xef\xb2\x5e\x06\x04\x21\xdd\x28\xa2\x28\x83\x68\x9b" + "\xac\x34\xdd\x36\x33\xda\xdd\xa4\x59\xc7\x5a\x4d\xf3\x83\x06\xd5\xc0" + "\x0d\x1f\x4f\x47\x2f\x9f\xcc\xc2\x0d\x21\x1e\x82\xb9\x3d\xf3\xa4\x1a" + "\xa6\xd8\x0e\x72\x1d\x71\x17\x1c\x54\xad\x37\x3e\xa4\x0e\x70\x86\x53" + "\xfb\x40\xad\xb9\x14\xf8\x8d\x93\xbb\xd7\xe7\x31\xce\xe0\x98\xda\x27" + "\x1c\x18\x8e\xd8\x85\xcb\xa7\xb1\x18\xac\x8c\xa8\x9d\xa9\xe2\xf6\x30" + "\x95\xa4\x81\xf4\x1c\xa0\x31\xd5\xc7\x9d\x28\x33\xee\x7f\x08\x4f\xcb" + "\xd1\x14\x17\xdf\xd0\x88\x78\x47\x29\xaf\x6c\xb2\x62\xa6\x30\x87\x29" + "\xaa\x80\x19\x7d\x2f\x05\xe3\x7e\x23\x73\x88\x08\xcc\xbd\x50\x46\x09" + "\x2a"; + +static const unsigned char sha512_sig[] = + "\x15\xda\x87\x87\x1f\x76\x08\xd3\x9d\x3a\xb9\xd2\x6a\x0e\x3b\x7d\xdd" + "\xec\x7d\xc4\x6d\x26\xf5\x04\xd3\x76\xc7\x83\xc4\x81\x69\x35\xe9\x47" + "\xbf\x49\xd1\xc0\xf9\x01\x4e\x0a\x34\x5b\xd0\xec\x6e\xe2\x2e\xe9\x2d" + "\x00\xfd\xe0\xa0\x28\x54\x53\x19\x49\x6d\xd2\x58\xb9\x47\xfa\x45\xad" + "\xd2\x1d\x52\xac\x80\xcb\xfc\x91\x97\x84\x58\x5f\xab\x21\x62\x60\x79" + "\xb8\x8a\x83\xe1\xf1\xcb\x05\x4c\x92\x56\x62\xd9\xbf\xa7\x81\x34\x23" + "\xdf\xd7\xa7\xc4\xdf\xde\x96\x00\x57\x4b\x78\x85\xb9\x3b\xdd\x3f\x98" + "\x88\x59\x1d\x48\xcf\x5a\xa8\xb7\x2a\x8b\x77\x93\x8e\x38\x3a\x0c\xa7" + "\x8a\x5f\xe6\x9f\xcb\xf0\x9a\x6b\xb6\x91\x04\x8b\x69\x6a\x37\xee\xa2" + "\xad\x5f\x31\x20\x96\xd6\x51\x80\xbf\x62\x48\xb8\xe4\x94\x10\x86\x4e" + "\xf2\x22\x1e\xa4\xd5\x54\xfe\xe1\x35\x49\xaf\xf8\x62\xfc\x11\xeb\xf7" + "\x3d\xd5\x5e\xaf\x11\xbd\x3d\xa9\x3a\x9f\x7f\xe8\xb4\x0d\xa2\xbb\x1c" + "\xbd\x4c\xed\x9e\x81\xb1\xec\xd3\xea\xaa\x03\xe3\x14\xdf\x8c\xb3\x78" + "\x85\x5e\x87\xad\xec\x41\x1a\xa9\x4f\xd2\xe6\xc6\xbe\xfa\xb8\x10\xea" + "\x74\x25\x36\x0c\x23\xe2\x24\xb7\x21\xb7\x0d\xaf\xf6\xb4\x31\xf5\x75" + "\xf1"; + +static isc_result_t +check_algorithm(unsigned char algorithm) { + BIGNUM *n = NULL, *e = NULL; + EVP_MD_CTX *evp_md_ctx = EVP_MD_CTX_create(); + EVP_PKEY *pkey = NULL; + const EVP_MD *type = NULL; + const unsigned char *sig = NULL; + int status; + isc_result_t ret = ISC_R_SUCCESS; + size_t len; +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + RSA *rsa = NULL; +#else + OSSL_PARAM *params = NULL; + OSSL_PARAM_BLD *bld = NULL; + EVP_PKEY_CTX *ctx = NULL; +#endif + + if (evp_md_ctx == NULL) { + DST_RET(ISC_R_NOMEMORY); + } + + switch (algorithm) { + case DST_ALG_RSASHA1: + case DST_ALG_NSEC3RSASHA1: + type = EVP_sha1(); /* SHA1 + RSA */ + sig = sha1_sig; + len = sizeof(sha1_sig) - 1; + break; + case DST_ALG_RSASHA256: + type = EVP_sha256(); /* SHA256 + RSA */ + sig = sha256_sig; + len = sizeof(sha256_sig) - 1; + break; + case DST_ALG_RSASHA512: + type = EVP_sha512(); + sig = sha512_sig; + len = sizeof(sha512_sig) - 1; + break; + default: + DST_RET(ISC_R_NOTIMPLEMENTED); + } + + if (type == NULL) { + DST_RET(ISC_R_NOTIMPLEMENTED); + } + + /* + * Construct pkey. + */ + e = BN_bin2bn(e_bytes, sizeof(e_bytes) - 1, NULL); + n = BN_bin2bn(n_bytes, sizeof(n_bytes) - 1, NULL); + if (e == NULL || n == NULL) { + DST_RET(ISC_R_NOMEMORY); + } + +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + rsa = RSA_new(); + if (rsa == NULL) { + DST_RET(dst__openssl_toresult2("RSA_new", + DST_R_OPENSSLFAILURE)); + } + status = RSA_set0_key(rsa, n, e, NULL); + if (status != 1) { + DST_RET(dst__openssl_toresult2("RSA_set0_key", + DST_R_OPENSSLFAILURE)); + } + + /* These are now managed by OpenSSL. */ + n = NULL; + e = NULL; + + pkey = EVP_PKEY_new(); + if (pkey == NULL) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_new", + DST_R_OPENSSLFAILURE)); + } + status = EVP_PKEY_set1_RSA(pkey, rsa); + if (status != 1) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_set1_RSA", + DST_R_OPENSSLFAILURE)); + } +#else + bld = OSSL_PARAM_BLD_new(); + if (bld == NULL) { + DST_RET(dst__openssl_toresult2("OSSL_PARAM_BLD_new", + DST_R_OPENSSLFAILURE)); + } + if (OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_N, n) != 1 || + OSSL_PARAM_BLD_push_BN(bld, OSSL_PKEY_PARAM_RSA_E, e) != 1) + { + DST_RET(dst__openssl_toresult2("OSSL_PARAM_BLD_push_BN", + DST_R_OPENSSLFAILURE)); + } + params = OSSL_PARAM_BLD_to_param(bld); + if (params == NULL) { + DST_RET(dst__openssl_toresult2("OSSL_PARAM_BLD_to_param", + DST_R_OPENSSLFAILURE)); + } + ctx = EVP_PKEY_CTX_new_from_name(NULL, "RSA", NULL); + if (ctx == NULL) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_CTX_new_from_name", + DST_R_OPENSSLFAILURE)); + } + status = EVP_PKEY_fromdata_init(ctx); + if (status != 1) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_fromdata_init", + DST_R_OPENSSLFAILURE)); + } + status = EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_PUBLIC_KEY, params); + if (status != 1 || pkey == NULL) { + DST_RET(dst__openssl_toresult2("EVP_PKEY_fromdata", + DST_R_OPENSSLFAILURE)); + } +#endif + + /* + * Check that we can verify the signature. + */ + if (EVP_DigestInit_ex(evp_md_ctx, type, NULL) != 1 || + EVP_DigestUpdate(evp_md_ctx, "test", 4) != 1 || + EVP_VerifyFinal(evp_md_ctx, sig, len, pkey) != 1) + { + DST_RET(ISC_R_NOTIMPLEMENTED); + } + +err: + BN_free(e); + BN_free(n); +#if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 + if (rsa != NULL) { + RSA_free(rsa); + } +#else + if (bld != NULL) { + OSSL_PARAM_BLD_free(bld); + } + if (ctx != NULL) { + EVP_PKEY_CTX_free(ctx); + } + if (params != NULL) { + OSSL_PARAM_free(params); + } +#endif + if (pkey != NULL) { + EVP_PKEY_free(pkey); + } + if (evp_md_ctx != NULL) { + EVP_MD_CTX_destroy(evp_md_ctx); + } + ERR_clear_error(); + return (ret); +} + +isc_result_t +dst__opensslrsa_init(dst_func_t **funcp, unsigned char algorithm) { + isc_result_t result; + + REQUIRE(funcp != NULL); + + result = check_algorithm(algorithm); + + if (result == ISC_R_SUCCESS) { + if (*funcp == NULL) { + *funcp = &opensslrsa_functions; + } + } else if (result == ISC_R_NOTIMPLEMENTED) { + result = ISC_R_SUCCESS; + } + + return (result); +} |