/* * Copyright (C) 2004, 2006 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 2000-2003 Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* * Principal Author: Brian Wellington * $Id: opensslrsa_link.c,v 1.1.4.9 2006/11/07 21:28:40 marka Exp $ */ #ifdef OPENSSL #include #include #include #include #include #include #include #include #include "dst_internal.h" #include "dst_openssl.h" #include "dst_parse.h" #include #include #include #if OPENSSL_VERSION_NUMBER > 0x00908000L #include #endif /* * We don't use configure for windows so enforce the OpenSSL version * here. Unlike with configure we don't support overriding this test. */ #ifdef WIN32 #if !((OPENSSL_VERSION_NUMBER >= 0x009070cfL && \ OPENSSL_VERSION_NUMBER < 0x00908000L) || \ OPENSSL_VERSION_NUMBER >= 0x0090804fL) #error Please upgrade OpenSSL to 0.9.8d/0.9.7l or greater. #endif #endif /* * XXXMPA Temporarially disable RSA_BLINDING as it requires * good quality random data that cannot currently be guarenteed. * XXXMPA Find which versions of openssl use pseudo random data * and set RSA_FLAG_BLINDING for those. */ #if 0 #if OPENSSL_VERSION_NUMBER < 0x0090601fL #define SET_FLAGS(rsa) \ do { \ (rsa)->flags &= ~(RSA_FLAG_CACHE_PUBLIC | RSA_FLAG_CACHE_PRIVATE); \ (rsa)->flags |= RSA_FLAG_BLINDING; \ } while (0) #else #define SET_FLAGS(rsa) \ do { \ (rsa)->flags |= RSA_FLAG_BLINDING; \ } while (0) #endif #endif #if OPENSSL_VERSION_NUMBER < 0x0090601fL #define SET_FLAGS(rsa) \ do { \ (rsa)->flags &= ~(RSA_FLAG_CACHE_PUBLIC | RSA_FLAG_CACHE_PRIVATE); \ (rsa)->flags &= ~RSA_FLAG_BLINDING; \ } while (0) #elif defined(RSA_FLAG_NO_BLINDING) #define SET_FLAGS(rsa) \ do { \ (rsa)->flags &= ~RSA_FLAG_BLINDING; \ (rsa)->flags |= RSA_FLAG_NO_BLINDING; \ } while (0) #else #define SET_FLAGS(rsa) \ do { \ (rsa)->flags &= ~RSA_FLAG_BLINDING; \ } while (0) #endif static isc_result_t opensslrsa_todns(const dst_key_t *key, isc_buffer_t *data); static isc_result_t opensslrsa_createctx(dst_key_t *key, dst_context_t *dctx) { UNUSED(key); REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 || dctx->key->key_alg == DST_ALG_RSASHA1); if (dctx->key->key_alg == DST_ALG_RSAMD5) { isc_md5_t *md5ctx; md5ctx = isc_mem_get(dctx->mctx, sizeof(isc_md5_t)); if (md5ctx == NULL) return (ISC_R_NOMEMORY); isc_md5_init(md5ctx); dctx->opaque = md5ctx; } else { isc_sha1_t *sha1ctx; sha1ctx = isc_mem_get(dctx->mctx, sizeof(isc_sha1_t)); if (sha1ctx == NULL) return (ISC_R_NOMEMORY); isc_sha1_init(sha1ctx); dctx->opaque = sha1ctx; } return (ISC_R_SUCCESS); } static void opensslrsa_destroyctx(dst_context_t *dctx) { REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 || dctx->key->key_alg == DST_ALG_RSASHA1); if (dctx->key->key_alg == DST_ALG_RSAMD5) { isc_md5_t *md5ctx = dctx->opaque; if (md5ctx != NULL) { isc_md5_invalidate(md5ctx); isc_mem_put(dctx->mctx, md5ctx, sizeof(isc_md5_t)); } } else { isc_sha1_t *sha1ctx = dctx->opaque; if (sha1ctx != NULL) { isc_sha1_invalidate(sha1ctx); isc_mem_put(dctx->mctx, sha1ctx, sizeof(isc_sha1_t)); } } dctx->opaque = NULL; } static isc_result_t opensslrsa_adddata(dst_context_t *dctx, const isc_region_t *data) { REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 || dctx->key->key_alg == DST_ALG_RSASHA1); if (dctx->key->key_alg == DST_ALG_RSAMD5) { isc_md5_t *md5ctx = dctx->opaque; isc_md5_update(md5ctx, data->base, data->length); } else { isc_sha1_t *sha1ctx = dctx->opaque; isc_sha1_update(sha1ctx, data->base, data->length); } return (ISC_R_SUCCESS); } static isc_result_t opensslrsa_sign(dst_context_t *dctx, isc_buffer_t *sig) { dst_key_t *key = dctx->key; RSA *rsa = key->opaque; isc_region_t r; /* note: ISC_SHA1_DIGESTLENGTH > ISC_MD5_DIGESTLENGTH */ unsigned char digest[ISC_SHA1_DIGESTLENGTH]; unsigned int siglen = 0; int status; int type; unsigned int digestlen; char *message; unsigned long err; const char* file; int line; REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 || dctx->key->key_alg == DST_ALG_RSASHA1); isc_buffer_availableregion(sig, &r); if (r.length < (unsigned int) RSA_size(rsa)) return (ISC_R_NOSPACE); if (dctx->key->key_alg == DST_ALG_RSAMD5) { isc_md5_t *md5ctx = dctx->opaque; isc_md5_final(md5ctx, digest); type = NID_md5; digestlen = ISC_MD5_DIGESTLENGTH; } else { isc_sha1_t *sha1ctx = dctx->opaque; isc_sha1_final(sha1ctx, digest); type = NID_sha1; digestlen = ISC_SHA1_DIGESTLENGTH; } status = RSA_sign(type, digest, digestlen, r.base, &siglen, rsa); if (status == 0) { err = ERR_peek_error_line(&file, &line); if (err != 0U) { message = ERR_error_string(err, NULL); fprintf(stderr, "%s:%s:%d\n", message, file ? file : "", line); } return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); } isc_buffer_add(sig, siglen); return (ISC_R_SUCCESS); } static isc_result_t opensslrsa_verify(dst_context_t *dctx, const isc_region_t *sig) { dst_key_t *key = dctx->key; RSA *rsa = key->opaque; /* note: ISC_SHA1_DIGESTLENGTH > ISC_MD5_DIGESTLENGTH */ unsigned char digest[ISC_SHA1_DIGESTLENGTH]; int status = 0; int type; unsigned int digestlen; REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 || dctx->key->key_alg == DST_ALG_RSASHA1); if (dctx->key->key_alg == DST_ALG_RSAMD5) { isc_md5_t *md5ctx = dctx->opaque; isc_md5_final(md5ctx, digest); type = NID_md5; digestlen = ISC_MD5_DIGESTLENGTH; } else { isc_sha1_t *sha1ctx = dctx->opaque; isc_sha1_final(sha1ctx, digest); type = NID_sha1; digestlen = ISC_SHA1_DIGESTLENGTH; } if (sig->length < (unsigned int) RSA_size(rsa)) return (DST_R_VERIFYFAILURE); status = RSA_verify(type, digest, digestlen, sig->base, RSA_size(rsa), rsa); if (status == 0) return (dst__openssl_toresult(DST_R_VERIFYFAILURE)); return (ISC_R_SUCCESS); } static isc_boolean_t opensslrsa_compare(const dst_key_t *key1, const dst_key_t *key2) { int status; RSA *rsa1, *rsa2; rsa1 = (RSA *) key1->opaque; rsa2 = (RSA *) key2->opaque; if (rsa1 == NULL && rsa2 == NULL) return (ISC_TRUE); else if (rsa1 == NULL || rsa2 == NULL) return (ISC_FALSE); status = BN_cmp(rsa1->n, rsa2->n) || BN_cmp(rsa1->e, rsa2->e); if (status != 0) return (ISC_FALSE); if (rsa1->d != NULL || rsa2->d != NULL) { if (rsa1->d == NULL || rsa2->d == NULL) return (ISC_FALSE); status = BN_cmp(rsa1->d, rsa2->d) || BN_cmp(rsa1->p, rsa2->p) || BN_cmp(rsa1->q, rsa2->q); if (status != 0) return (ISC_FALSE); } return (ISC_TRUE); } static isc_result_t opensslrsa_generate(dst_key_t *key, int exp) { #if OPENSSL_VERSION_NUMBER > 0x00908000L BN_GENCB cb; RSA *rsa = RSA_new(); BIGNUM *e = BN_new(); if (rsa == NULL || e == NULL) goto err; if (exp == 0) { /* RSA_F4 0x10001 */ BN_set_bit(e, 0); BN_set_bit(e, 16); } else { /* F5 0x100000001 */ BN_set_bit(e, 0); BN_set_bit(e, 32); } BN_GENCB_set_old(&cb, NULL, NULL); if (RSA_generate_key_ex(rsa, key->key_size, e, &cb)) { BN_free(e); SET_FLAGS(rsa); key->opaque = rsa; return (ISC_R_SUCCESS); } err: if (e != NULL) BN_free(e); if (rsa != NULL) RSA_free(rsa); return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); #else RSA *rsa; unsigned long e; if (exp == 0) e = RSA_F4; else e = 0x40000003; rsa = RSA_generate_key(key->key_size, e, NULL, NULL); if (rsa == NULL) return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); SET_FLAGS(rsa); key->opaque = rsa; return (ISC_R_SUCCESS); #endif } static isc_boolean_t opensslrsa_isprivate(const dst_key_t *key) { RSA *rsa = (RSA *) key->opaque; return (ISC_TF(rsa != NULL && rsa->d != NULL)); } static void opensslrsa_destroy(dst_key_t *key) { RSA *rsa = key->opaque; RSA_free(rsa); key->opaque = NULL; } static isc_result_t opensslrsa_todns(const dst_key_t *key, isc_buffer_t *data) { RSA *rsa; isc_region_t r; unsigned int e_bytes; unsigned int mod_bytes; REQUIRE(key->opaque != NULL); rsa = (RSA *) key->opaque; isc_buffer_availableregion(data, &r); e_bytes = BN_num_bytes(rsa->e); mod_bytes = BN_num_bytes(rsa->n); if (e_bytes < 256) { /* key exponent is <= 2040 bits */ if (r.length < 1) return (ISC_R_NOSPACE); isc_buffer_putuint8(data, (isc_uint8_t) e_bytes); } else { if (r.length < 3) return (ISC_R_NOSPACE); isc_buffer_putuint8(data, 0); isc_buffer_putuint16(data, (isc_uint16_t) e_bytes); } if (r.length < e_bytes + mod_bytes) return (ISC_R_NOSPACE); isc_buffer_availableregion(data, &r); BN_bn2bin(rsa->e, r.base); r.base += e_bytes; BN_bn2bin(rsa->n, r.base); isc_buffer_add(data, e_bytes + mod_bytes); return (ISC_R_SUCCESS); } static isc_result_t opensslrsa_fromdns(dst_key_t *key, isc_buffer_t *data) { RSA *rsa; isc_region_t r; unsigned int e_bytes; isc_buffer_remainingregion(data, &r); if (r.length == 0) return (ISC_R_SUCCESS); rsa = RSA_new(); if (rsa == NULL) return (ISC_R_NOMEMORY); SET_FLAGS(rsa); if (r.length < 1) { RSA_free(rsa); return (DST_R_INVALIDPUBLICKEY); } e_bytes = *r.base++; r.length--; if (e_bytes == 0) { if (r.length < 2) { RSA_free(rsa); return (DST_R_INVALIDPUBLICKEY); } e_bytes = ((*r.base++) << 8); e_bytes += *r.base++; r.length -= 2; } if (r.length < e_bytes) { RSA_free(rsa); return (DST_R_INVALIDPUBLICKEY); } rsa->e = BN_bin2bn(r.base, e_bytes, NULL); r.base += e_bytes; r.length -= e_bytes; rsa->n = BN_bin2bn(r.base, r.length, NULL); key->key_size = BN_num_bits(rsa->n); isc_buffer_forward(data, r.length); key->opaque = (void *) 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; if (key->opaque == NULL) return (DST_R_NULLKEY); rsa = (RSA *) key->opaque; for (i = 0; i < 8; i++) { bufs[i] = isc_mem_get(key->mctx, BN_num_bytes(rsa->n)); if (bufs[i] == NULL) { result = ISC_R_NOMEMORY; goto fail; } } i = 0; priv.elements[i].tag = TAG_RSA_MODULUS; priv.elements[i].length = BN_num_bytes(rsa->n); BN_bn2bin(rsa->n, bufs[i]); priv.elements[i].data = bufs[i]; i++; priv.elements[i].tag = TAG_RSA_PUBLICEXPONENT; priv.elements[i].length = BN_num_bytes(rsa->e); BN_bn2bin(rsa->e, bufs[i]); priv.elements[i].data = bufs[i]; i++; priv.elements[i].tag = TAG_RSA_PRIVATEEXPONENT; priv.elements[i].length = BN_num_bytes(rsa->d); BN_bn2bin(rsa->d, bufs[i]); priv.elements[i].data = bufs[i]; i++; priv.elements[i].tag = TAG_RSA_PRIME1; priv.elements[i].length = BN_num_bytes(rsa->p); BN_bn2bin(rsa->p, bufs[i]); priv.elements[i].data = bufs[i]; i++; priv.elements[i].tag = TAG_RSA_PRIME2; priv.elements[i].length = BN_num_bytes(rsa->q); BN_bn2bin(rsa->q, bufs[i]); priv.elements[i].data = bufs[i]; i++; priv.elements[i].tag = TAG_RSA_EXPONENT1; priv.elements[i].length = BN_num_bytes(rsa->dmp1); BN_bn2bin(rsa->dmp1, bufs[i]); priv.elements[i].data = bufs[i]; i++; priv.elements[i].tag = TAG_RSA_EXPONENT2; priv.elements[i].length = BN_num_bytes(rsa->dmq1); BN_bn2bin(rsa->dmq1, bufs[i]); priv.elements[i].data = bufs[i]; i++; priv.elements[i].tag = TAG_RSA_COEFFICIENT; priv.elements[i].length = BN_num_bytes(rsa->iqmp); BN_bn2bin(rsa->iqmp, bufs[i]); priv.elements[i].data = bufs[i]; i++; priv.nelements = i; result = dst__privstruct_writefile(key, &priv, directory); fail: for (i = 0; i < 8; i++) { if (bufs[i] == NULL) break; isc_mem_put(key->mctx, bufs[i], BN_num_bytes(rsa->n)); } return (result); } static isc_result_t opensslrsa_parse(dst_key_t *key, isc_lex_t *lexer) { dst_private_t priv; isc_result_t ret; int i; RSA *rsa = NULL; isc_mem_t *mctx = key->mctx; #define DST_RET(a) {ret = a; goto err;} /* read private key file */ ret = dst__privstruct_parse(key, DST_ALG_RSA, lexer, mctx, &priv); if (ret != ISC_R_SUCCESS) return (ret); rsa = RSA_new(); if (rsa == NULL) DST_RET(ISC_R_NOMEMORY); SET_FLAGS(rsa); key->opaque = rsa; for (i = 0; i < priv.nelements; i++) { BIGNUM *bn; 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: rsa->n = bn; break; case TAG_RSA_PUBLICEXPONENT: rsa->e = bn; break; case TAG_RSA_PRIVATEEXPONENT: rsa->d = bn; break; case TAG_RSA_PRIME1: rsa->p = bn; break; case TAG_RSA_PRIME2: rsa->q = bn; break; case TAG_RSA_EXPONENT1: rsa->dmp1 = bn; break; case TAG_RSA_EXPONENT2: rsa->dmq1 = bn; break; case TAG_RSA_COEFFICIENT: rsa->iqmp = bn; break; } } dst__privstruct_free(&priv, mctx); key->key_size = BN_num_bits(rsa->n); return (ISC_R_SUCCESS); err: opensslrsa_destroy(key); dst__privstruct_free(&priv, mctx); memset(&priv, 0, sizeof(priv)); return (ret); } static dst_func_t opensslrsa_functions = { opensslrsa_createctx, opensslrsa_destroyctx, opensslrsa_adddata, opensslrsa_sign, opensslrsa_verify, NULL, /* computesecret */ opensslrsa_compare, NULL, /* paramcompare */ opensslrsa_generate, opensslrsa_isprivate, opensslrsa_destroy, opensslrsa_todns, opensslrsa_fromdns, opensslrsa_tofile, opensslrsa_parse, NULL, /* cleanup */ }; isc_result_t dst__opensslrsa_init(dst_func_t **funcp) { REQUIRE(funcp != NULL); if (*funcp == NULL) *funcp = &opensslrsa_functions; return (ISC_R_SUCCESS); } #else /* OPENSSL */ #include EMPTY_TRANSLATION_UNIT #endif /* OPENSSL */