/* $NetBSD: opensslrsa_link.c,v 1.1.4.2 2024/02/29 11:38:41 martin Exp $ */ /* * 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. */ #if !USE_PKCS11 #include #include #include #include #include #include #include #include #include #include #include #include #include "dst_internal.h" #include "dst_openssl.h" #include "dst_parse.h" #if !defined(OPENSSL_NO_ENGINE) #include #endif /* if !defined(OPENSSL_NO_ENGINE) */ /* * Limit the size of public exponents. */ #ifndef RSA_MAX_PUBEXP_BITS #define RSA_MAX_PUBEXP_BITS 35 #endif /* ifndef RSA_MAX_PUBEXP_BITS */ /* * We don't use configure for windows so enforce the OpenSSL version * here. Unlike with configure we don't support overriding this test. */ #if defined(WIN32) && (OPENSSL_VERSION_NUMBER < 0x10000000L) #error Please upgrade OpenSSL to 1.0.0 or greater. #endif /* if defined(WIN32) && (OPENSSL_VERSION_NUMBER < 0x10000000L) */ #define DST_RET(a) \ { \ ret = a; \ goto err; \ } #if !HAVE_RSA_SET0_KEY /* From OpenSSL 1.1.0 */ static int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) { /* * If the fields n and e in r are NULL, the corresponding input * parameters MUST be non-NULL for n and e. d may be * left NULL (in case only the public key is used). */ if ((r->n == NULL && n == NULL) || (r->e == NULL && e == NULL)) { return (0); } if (n != NULL) { BN_free(r->n); r->n = n; } if (e != NULL) { BN_free(r->e); r->e = e; } if (d != NULL) { BN_free(r->d); r->d = d; } return (1); } static int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q) { /* * If the fields p and q in r are NULL, the corresponding input * parameters MUST be non-NULL. */ if ((r->p == NULL && p == NULL) || (r->q == NULL && q == NULL)) { return (0); } if (p != NULL) { BN_free(r->p); r->p = p; } if (q != NULL) { BN_free(r->q); r->q = q; } return (1); } static int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp) { /* * If the fields dmp1, dmq1 and iqmp in r are NULL, the * corresponding input parameters MUST be non-NULL. */ if ((r->dmp1 == NULL && dmp1 == NULL) || (r->dmq1 == NULL && dmq1 == NULL) || (r->iqmp == NULL && iqmp == NULL)) { return (0); } if (dmp1 != NULL) { BN_free(r->dmp1); r->dmp1 = dmp1; } if (dmq1 != NULL) { BN_free(r->dmq1); r->dmq1 = dmq1; } if (iqmp != NULL) { BN_free(r->iqmp); r->iqmp = iqmp; } return (1); } static void RSA_get0_key(const RSA *r, const BIGNUM **n, const BIGNUM **e, const BIGNUM **d) { if (n != NULL) { *n = r->n; } if (e != NULL) { *e = r->e; } if (d != NULL) { *d = r->d; } } static void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q) { if (p != NULL) { *p = r->p; } if (q != NULL) { *q = r->q; } } static void RSA_get0_crt_params(const RSA *r, const BIGNUM **dmp1, const BIGNUM **dmq1, const BIGNUM **iqmp) { if (dmp1 != NULL) { *dmp1 = r->dmp1; } if (dmq1 != NULL) { *dmq1 = r->dmq1; } if (iqmp != NULL) { *iqmp = r->iqmp; } } static int RSA_test_flags(const RSA *r, int flags) { return (r->flags & flags); } #endif /* !HAVE_RSA_SET0_KEY */ 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->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 (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 = dctx->ctxdata.evp_md_ctx; 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); 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 = dctx->ctxdata.evp_md_ctx; 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); 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 = dctx->key; isc_region_t r; unsigned int siglen = 0; EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx; EVP_PKEY *pkey = key->keydata.pkey; 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); 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 = dctx->key; int status = 0; const BIGNUM *e = NULL; EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx; EVP_PKEY *pkey = key->keydata.pkey; RSA *rsa; int bits; 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); 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); 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) { int status; RSA *rsa1 = NULL, *rsa2 = NULL; const BIGNUM *n1 = NULL, *n2 = NULL; const BIGNUM *e1 = NULL, *e2 = NULL; const BIGNUM *d1 = NULL, *d2 = NULL; const BIGNUM *p1 = NULL, *p2 = NULL; const BIGNUM *q1 = NULL, *q2 = NULL; EVP_PKEY *pkey1, *pkey2; pkey1 = key1->keydata.pkey; pkey2 = key2->keydata.pkey; /* * The pkey reference will keep these around after * the RSA_free() call. */ if (pkey1 != NULL) { rsa1 = EVP_PKEY_get1_RSA(pkey1); RSA_free(rsa1); } if (pkey2 != NULL) { rsa2 = EVP_PKEY_get1_RSA(pkey2); RSA_free(rsa2); } if (rsa1 == NULL && rsa2 == NULL) { return (true); } else if (rsa1 == NULL || rsa2 == NULL) { return (false); } RSA_get0_key(rsa1, &n1, &e1, &d1); RSA_get0_key(rsa2, &n2, &e2, &d2); status = BN_cmp(n1, n2) || BN_cmp(e1, e2); if (status != 0) { return (false); } if (RSA_test_flags(rsa1, RSA_FLAG_EXT_PKEY) != 0 || RSA_test_flags(rsa2, RSA_FLAG_EXT_PKEY) != 0) { if (RSA_test_flags(rsa1, RSA_FLAG_EXT_PKEY) == 0 || RSA_test_flags(rsa2, RSA_FLAG_EXT_PKEY) == 0) { return (false); } /* * Can't compare private parameters, BTW does it make sense? */ return (true); } if (d1 != NULL || d2 != NULL) { if (d1 == NULL || d2 == NULL) { return (false); } RSA_get0_factors(rsa1, &p1, &q1); RSA_get0_factors(rsa2, &p2, &q2); status = BN_cmp(d1, d2) || BN_cmp(p1, p2) || BN_cmp(q1, q2); if (status != 0) { return (false); } } return (true); } 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); } static isc_result_t opensslrsa_generate(dst_key_t *key, int exp, void (*callback)(int)) { isc_result_t ret = DST_R_OPENSSLFAILURE; union { void *dptr; void (*fptr)(int); } u; RSA *rsa = RSA_new(); BIGNUM *e = BN_new(); #if !HAVE_BN_GENCB_NEW BN_GENCB _cb; #endif /* !HAVE_BN_GENCB_NEW */ BN_GENCB *cb = BN_GENCB_new(); EVP_PKEY *pkey = EVP_PKEY_new(); /* * 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) { goto err; } break; case DST_ALG_RSASHA256: /* From RFC 5702 */ if ((key->key_size < 512) || (key->key_size > 4096)) { goto err; } break; case DST_ALG_RSASHA512: /* From RFC 5702 */ if ((key->key_size < 1024) || (key->key_size > 4096)) { goto err; } break; default: UNREACHABLE(); } if (rsa == NULL || e == NULL || cb == NULL) { goto err; } if (pkey == NULL) { goto err; } if (!EVP_PKEY_set1_RSA(pkey, rsa)) { goto err; } 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 (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)) { BN_free(e); BN_GENCB_free(cb); cb = NULL; key->keydata.pkey = pkey; RSA_free(rsa); return (ISC_R_SUCCESS); } ret = dst__openssl_toresult2("RSA_generate_key_ex", DST_R_OPENSSLFAILURE); err: if (pkey != NULL) { EVP_PKEY_free(pkey); pkey = NULL; } if (e != NULL) { BN_free(e); e = NULL; } if (rsa != NULL) { RSA_free(rsa); rsa = NULL; } if (cb != NULL) { BN_GENCB_free(cb); cb = NULL; } return (dst__openssl_toresult(ret)); } static bool opensslrsa_isprivate(const dst_key_t *key) { const BIGNUM *d = NULL; RSA *rsa = EVP_PKEY_get1_RSA(key->keydata.pkey); INSIST(rsa != NULL); RSA_free(rsa); /* key->keydata.pkey still has a reference so rsa is still valid. */ if (rsa != NULL && RSA_test_flags(rsa, RSA_FLAG_EXT_PKEY) != 0) { return (true); } RSA_get0_key(rsa, NULL, NULL, &d); return (rsa != NULL && d != NULL); } static void opensslrsa_destroy(dst_key_t *key) { EVP_PKEY *pkey = key->keydata.pkey; 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; RSA *rsa; EVP_PKEY *pkey; const BIGNUM *e = NULL, *n = NULL; REQUIRE(key->keydata.pkey != NULL); pkey = key->keydata.pkey; rsa = EVP_PKEY_get1_RSA(pkey); if (rsa == NULL) { return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); } RSA_get0_key(rsa, &n, &e, NULL); 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); isc_buffer_availableregion(data, &r); 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); } RSA_get0_key(rsa, &n, &e, NULL); BN_bn2bin(e, r.base); isc_region_consume(&r, e_bytes); BN_bn2bin(n, r.base); isc_buffer_add(data, e_bytes + mod_bytes); ret = ISC_R_SUCCESS; err: RSA_free(rsa); return (ret); } static isc_result_t opensslrsa_fromdns(dst_key_t *key, isc_buffer_t *data) { RSA *rsa; isc_region_t r; unsigned int e_bytes; unsigned int length; EVP_PKEY *pkey; BIGNUM *e = NULL, *n = NULL; isc_buffer_remainingregion(data, &r); if (r.length == 0) { return (ISC_R_SUCCESS); } length = r.length; rsa = RSA_new(); if (rsa == NULL) { return (dst__openssl_toresult(ISC_R_NOMEMORY)); } if (r.length < 1) { RSA_free(rsa); return (DST_R_INVALIDPUBLICKEY); } e_bytes = *r.base; isc_region_consume(&r, 1); if (e_bytes == 0) { if (r.length < 2) { RSA_free(rsa); return (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) { RSA_free(rsa); return (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) { RSA_free(rsa); 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_free(rsa); return (ISC_R_NOMEMORY); } key->key_size = BN_num_bits(n); isc_buffer_forward(data, length); pkey = EVP_PKEY_new(); if (pkey == NULL) { RSA_free(rsa); return (ISC_R_NOMEMORY); } if (!EVP_PKEY_set1_RSA(pkey, rsa)) { EVP_PKEY_free(pkey); RSA_free(rsa); return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); } key->keydata.pkey = pkey; RSA_free(rsa); return (ISC_R_SUCCESS); } static isc_result_t opensslrsa_tofile(const dst_key_t *key, const char *directory) { int i; RSA *rsa; dst_private_t priv; unsigned char *bufs[8]; isc_result_t result; const BIGNUM *n = NULL, *e = NULL, *d = NULL; const BIGNUM *p = NULL, *q = NULL; const BIGNUM *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL; if (key->external) { priv.nelements = 0; return (dst__privstruct_writefile(key, &priv, directory)); } if (key->keydata.pkey == NULL) { return (DST_R_NULLKEY); } rsa = EVP_PKEY_get1_RSA(key->keydata.pkey); if (rsa == NULL) { return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); } memset(bufs, 0, sizeof(bufs)); RSA_get0_key(rsa, &n, &e, &d); RSA_get0_factors(rsa, &p, &q); RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp); for (i = 0; i < 8; i++) { bufs[i] = isc_mem_get(key->mctx, BN_num_bytes(n)); } i = 0; priv.elements[i].tag = TAG_RSA_MODULUS; priv.elements[i].length = BN_num_bytes(n); 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); 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); 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); 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); 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); 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); 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); 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; result = dst__privstruct_writefile(key, &priv, directory); RSA_free(rsa); for (i = 0; i < 8; i++) { if (bufs[i] == NULL) { break; } isc_mem_put(key->mctx, bufs[i], BN_num_bytes(n)); } return (result); } 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. */ RSA_get0_key(rsa, &n1, &e1, NULL); if (pub != 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); } 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; RSA *rsa = NULL, *pubrsa = NULL; #if !defined(OPENSSL_NO_ENGINE) ENGINE *ep = NULL; const BIGNUM *ex = NULL; #endif /* if !defined(OPENSSL_NO_ENGINE) */ isc_mem_t *mctx = key->mctx; 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; /* 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) { DST_RET(DST_R_INVALIDPRIVATEKEY); } if (pub == NULL) { DST_RET(DST_R_INVALIDPRIVATEKEY); } key->keydata.pkey = pub->keydata.pkey; pub->keydata.pkey = NULL; key->key_size = pub->key_size; dst__privstruct_free(&priv, mctx); isc_safe_memwipe(&priv, sizeof(priv)); return (ISC_R_SUCCESS); } if (pub != NULL && pub->keydata.pkey != NULL) { pubrsa = EVP_PKEY_get1_RSA(pub->keydata.pkey); } 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 is stored in a HSM? * See if we can fetch it. */ if (label != NULL) { #if !defined(OPENSSL_NO_ENGINE) if (engine == NULL) { DST_RET(DST_R_NOENGINE); } ep = dst__openssl_getengine(engine); if (ep == NULL) { DST_RET(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_R_INVALIDPRIVATEKEY); } RSA_get0_key(rsa, NULL, &ex, NULL); if (BN_num_bits(ex) > RSA_MAX_PUBEXP_BITS) { DST_RET(ISC_R_RANGE); } if (pubrsa != NULL) { RSA_free(pubrsa); } key->key_size = EVP_PKEY_bits(pkey); key->keydata.pkey = pkey; RSA_free(rsa); dst__privstruct_free(&priv, mctx); isc_safe_memwipe(&priv, sizeof(priv)); return (ISC_R_SUCCESS); #else /* if !defined(OPENSSL_NO_ENGINE) */ DST_RET(DST_R_NOENGINE); #endif /* if !defined(OPENSSL_NO_ENGINE) */ } 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)) { DST_RET(ISC_R_FAILURE); } key->keydata.pkey = pkey; 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; } } } dst__privstruct_free(&priv, mctx); isc_safe_memwipe(&priv, sizeof(priv)); 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_free(d); } } if (RSA_set0_factors(rsa, p, q) == 0) { if (p != NULL) { BN_free(p); } if (q != NULL) { BN_free(q); } } if (RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp) == 0) { if (dmp1 != NULL) { BN_free(dmp1); } if (dmq1 != NULL) { BN_free(dmq1); } if (iqmp != NULL) { BN_free(iqmp); } } if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS) { DST_RET(DST_R_INVALIDPRIVATEKEY); } if (BN_num_bits(e) > RSA_MAX_PUBEXP_BITS) { DST_RET(ISC_R_RANGE); } key->key_size = BN_num_bits(n); if (pubrsa != NULL) { RSA_free(pubrsa); } RSA_free(rsa); return (ISC_R_SUCCESS); err: if (pkey != NULL) { EVP_PKEY_free(pkey); } if (rsa != NULL) { RSA_free(rsa); } if (pubrsa != NULL) { RSA_free(pubrsa); } 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) ENGINE *e = NULL; isc_result_t ret; EVP_PKEY *pkey = 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_R_NOENGINE); } pkey = ENGINE_load_public_key(e, label, NULL, NULL); if (pkey != NULL) { pubrsa = EVP_PKEY_get1_RSA(pkey); EVP_PKEY_free(pkey); 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", 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_R_INVALIDPRIVATEKEY); } RSA_get0_key(rsa, NULL, &ex, NULL); if (BN_num_bits(ex) > RSA_MAX_PUBEXP_BITS) { DST_RET(ISC_R_RANGE); } if (pubrsa != NULL) { RSA_free(pubrsa); } key->key_size = EVP_PKEY_bits(pkey); key->keydata.pkey = pkey; RSA_free(rsa); return (ISC_R_SUCCESS); err: if (rsa != NULL) { RSA_free(rsa); } if (pubrsa != NULL) { RSA_free(pubrsa); } if (pkey != NULL) { EVP_PKEY_free(pkey); } return (ret); #else /* if !defined(OPENSSL_NO_ENGINE) */ UNUSED(key); UNUSED(engine); UNUSED(label); UNUSED(pin); return (DST_R_NOENGINE); #endif /* if !defined(OPENSSL_NO_ENGINE) */ } 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; RSA *rsa = NULL; 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); } 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)); } /* * 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 (rsa != NULL) { RSA_free(rsa); } 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); } #endif /* !USE_PKCS11 */ /*! \file */