diff options
Diffstat (limited to 'contrib/bind9/lib/dns/openssldsa_link.c')
| -rw-r--r-- | contrib/bind9/lib/dns/openssldsa_link.c | 462 |
1 files changed, 0 insertions, 462 deletions
diff --git a/contrib/bind9/lib/dns/openssldsa_link.c b/contrib/bind9/lib/dns/openssldsa_link.c deleted file mode 100644 index d2b0833..0000000 --- a/contrib/bind9/lib/dns/openssldsa_link.c +++ /dev/null @@ -1,462 +0,0 @@ -/* - * Portions Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC") - * Portions Copyright (C) 1999-2002 Internet Software Consortium. - * Portions Copyright (C) 1995-2000 by Network Associates, Inc. - * - * Permission to use, copy, modify, and/or 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 AND NETWORK ASSOCIATES 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. - */ - -/* $Id: openssldsa_link.c,v 1.1.6.9 2007/08/28 07:20:04 tbox Exp $ */ - -#ifdef OPENSSL - -#include <config.h> - -#include <string.h> - -#include <isc/entropy.h> -#include <isc/mem.h> -#include <isc/sha1.h> -#include <isc/util.h> - -#include <dst/result.h> - -#include "dst_internal.h" -#include "dst_openssl.h" -#include "dst_parse.h" - -#include <openssl/dsa.h> - -static isc_result_t openssldsa_todns(const dst_key_t *key, isc_buffer_t *data); - -static isc_result_t -openssldsa_createctx(dst_key_t *key, dst_context_t *dctx) { - isc_sha1_t *sha1ctx; - - UNUSED(key); - - sha1ctx = isc_mem_get(dctx->mctx, sizeof(isc_sha1_t)); - isc_sha1_init(sha1ctx); - dctx->opaque = sha1ctx; - return (ISC_R_SUCCESS); -} - -static void -openssldsa_destroyctx(dst_context_t *dctx) { - 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 -openssldsa_adddata(dst_context_t *dctx, const isc_region_t *data) { - isc_sha1_t *sha1ctx = dctx->opaque; - - isc_sha1_update(sha1ctx, data->base, data->length); - return (ISC_R_SUCCESS); -} - -static int -BN_bn2bin_fixed(BIGNUM *bn, unsigned char *buf, int size) { - int bytes = size - BN_num_bytes(bn); - while (bytes-- > 0) - *buf++ = 0; - BN_bn2bin(bn, buf); - return (size); -} - -static isc_result_t -openssldsa_sign(dst_context_t *dctx, isc_buffer_t *sig) { - isc_sha1_t *sha1ctx = dctx->opaque; - dst_key_t *key = dctx->key; - DSA *dsa = key->opaque; - DSA_SIG *dsasig; - isc_region_t r; - unsigned char digest[ISC_SHA1_DIGESTLENGTH]; - - isc_buffer_availableregion(sig, &r); - if (r.length < ISC_SHA1_DIGESTLENGTH * 2 + 1) - return (ISC_R_NOSPACE); - - isc_sha1_final(sha1ctx, digest); - - dsasig = DSA_do_sign(digest, ISC_SHA1_DIGESTLENGTH, dsa); - if (dsasig == NULL) - return (dst__openssl_toresult(DST_R_SIGNFAILURE)); - - *r.base++ = (key->key_size - 512)/64; - BN_bn2bin_fixed(dsasig->r, r.base, ISC_SHA1_DIGESTLENGTH); - r.base += ISC_SHA1_DIGESTLENGTH; - BN_bn2bin_fixed(dsasig->s, r.base, ISC_SHA1_DIGESTLENGTH); - r.base += ISC_SHA1_DIGESTLENGTH; - DSA_SIG_free(dsasig); - isc_buffer_add(sig, ISC_SHA1_DIGESTLENGTH * 2 + 1); - - return (ISC_R_SUCCESS); -} - -static isc_result_t -openssldsa_verify(dst_context_t *dctx, const isc_region_t *sig) { - isc_sha1_t *sha1ctx = dctx->opaque; - dst_key_t *key = dctx->key; - DSA *dsa = key->opaque; - DSA_SIG *dsasig; - int status = 0; - unsigned char digest[ISC_SHA1_DIGESTLENGTH]; - unsigned char *cp = sig->base; - - isc_sha1_final(sha1ctx, digest); - - if (sig->length < 2 * ISC_SHA1_DIGESTLENGTH + 1) - return (DST_R_VERIFYFAILURE); - - cp++; /*%< Skip T */ - dsasig = DSA_SIG_new(); - dsasig->r = BN_bin2bn(cp, ISC_SHA1_DIGESTLENGTH, NULL); - cp += ISC_SHA1_DIGESTLENGTH; - dsasig->s = BN_bin2bn(cp, ISC_SHA1_DIGESTLENGTH, NULL); - cp += ISC_SHA1_DIGESTLENGTH; - - status = DSA_do_verify(digest, ISC_SHA1_DIGESTLENGTH, dsasig, dsa); - DSA_SIG_free(dsasig); - if (status == 0) - return (dst__openssl_toresult(DST_R_VERIFYFAILURE)); - - return (ISC_R_SUCCESS); -} - -static isc_boolean_t -openssldsa_compare(const dst_key_t *key1, const dst_key_t *key2) { - int status; - DSA *dsa1, *dsa2; - - dsa1 = (DSA *) key1->opaque; - dsa2 = (DSA *) key2->opaque; - - if (dsa1 == NULL && dsa2 == NULL) - return (ISC_TRUE); - else if (dsa1 == NULL || dsa2 == NULL) - return (ISC_FALSE); - - status = BN_cmp(dsa1->p, dsa2->p) || - BN_cmp(dsa1->q, dsa2->q) || - BN_cmp(dsa1->g, dsa2->g) || - BN_cmp(dsa1->pub_key, dsa2->pub_key); - - if (status != 0) - return (ISC_FALSE); - - if (dsa1->priv_key != NULL || dsa2->priv_key != NULL) { - if (dsa1->priv_key == NULL || dsa2->priv_key == NULL) - return (ISC_FALSE); - if (BN_cmp(dsa1->priv_key, dsa2->priv_key)) - return (ISC_FALSE); - } - return (ISC_TRUE); -} - -static isc_result_t -openssldsa_generate(dst_key_t *key, int unused) { -#if OPENSSL_VERSION_NUMBER > 0x00908000L - BN_GENCB cb; -#endif - DSA *dsa; - unsigned char rand_array[ISC_SHA1_DIGESTLENGTH]; - isc_result_t result; - - UNUSED(unused); - - result = dst__entropy_getdata(rand_array, sizeof(rand_array), - ISC_FALSE); - if (result != ISC_R_SUCCESS) - return (result); - -#if OPENSSL_VERSION_NUMBER > 0x00908000L - dsa = DSA_new(); - if (dsa == NULL) - return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); - - BN_GENCB_set_old(&cb, NULL, NULL); - - if (!DSA_generate_parameters_ex(dsa, key->key_size, rand_array, - ISC_SHA1_DIGESTLENGTH, NULL, NULL, - &cb)) - { - DSA_free(dsa); - return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); - } -#else - dsa = DSA_generate_parameters(key->key_size, rand_array, - ISC_SHA1_DIGESTLENGTH, NULL, NULL, - NULL, NULL); - if (dsa == NULL) - return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); -#endif - - if (DSA_generate_key(dsa) == 0) { - DSA_free(dsa); - return (dst__openssl_toresult(DST_R_OPENSSLFAILURE)); - } - dsa->flags &= ~DSA_FLAG_CACHE_MONT_P; - - key->opaque = dsa; - - return (ISC_R_SUCCESS); -} - -static isc_boolean_t -openssldsa_isprivate(const dst_key_t *key) { - DSA *dsa = (DSA *) key->opaque; - return (ISC_TF(dsa != NULL && dsa->priv_key != NULL)); -} - -static void -openssldsa_destroy(dst_key_t *key) { - DSA *dsa = key->opaque; - DSA_free(dsa); - key->opaque = NULL; -} - - -static isc_result_t -openssldsa_todns(const dst_key_t *key, isc_buffer_t *data) { - DSA *dsa; - isc_region_t r; - int dnslen; - unsigned int t, p_bytes; - - REQUIRE(key->opaque != NULL); - - dsa = (DSA *) key->opaque; - - isc_buffer_availableregion(data, &r); - - t = (BN_num_bytes(dsa->p) - 64) / 8; - if (t > 8) - return (DST_R_INVALIDPUBLICKEY); - p_bytes = 64 + 8 * t; - - dnslen = 1 + (key->key_size * 3)/8 + ISC_SHA1_DIGESTLENGTH; - if (r.length < (unsigned int) dnslen) - return (ISC_R_NOSPACE); - - *r.base++ = t; - BN_bn2bin_fixed(dsa->q, r.base, ISC_SHA1_DIGESTLENGTH); - r.base += ISC_SHA1_DIGESTLENGTH; - BN_bn2bin_fixed(dsa->p, r.base, key->key_size/8); - r.base += p_bytes; - BN_bn2bin_fixed(dsa->g, r.base, key->key_size/8); - r.base += p_bytes; - BN_bn2bin_fixed(dsa->pub_key, r.base, key->key_size/8); - r.base += p_bytes; - - isc_buffer_add(data, dnslen); - - return (ISC_R_SUCCESS); -} - -static isc_result_t -openssldsa_fromdns(dst_key_t *key, isc_buffer_t *data) { - DSA *dsa; - isc_region_t r; - unsigned int t, p_bytes; - isc_mem_t *mctx = key->mctx; - - UNUSED(mctx); - - isc_buffer_remainingregion(data, &r); - if (r.length == 0) - return (ISC_R_SUCCESS); - - dsa = DSA_new(); - if (dsa == NULL) - return (ISC_R_NOMEMORY); - dsa->flags &= ~DSA_FLAG_CACHE_MONT_P; - - t = (unsigned int) *r.base++; - if (t > 8) { - DSA_free(dsa); - return (DST_R_INVALIDPUBLICKEY); - } - p_bytes = 64 + 8 * t; - - if (r.length < 1 + ISC_SHA1_DIGESTLENGTH + 3 * p_bytes) { - DSA_free(dsa); - return (DST_R_INVALIDPUBLICKEY); - } - - dsa->q = BN_bin2bn(r.base, ISC_SHA1_DIGESTLENGTH, NULL); - r.base += ISC_SHA1_DIGESTLENGTH; - - dsa->p = BN_bin2bn(r.base, p_bytes, NULL); - r.base += p_bytes; - - dsa->g = BN_bin2bn(r.base, p_bytes, NULL); - r.base += p_bytes; - - dsa->pub_key = BN_bin2bn(r.base, p_bytes, NULL); - r.base += p_bytes; - - key->key_size = p_bytes * 8; - - isc_buffer_forward(data, 1 + ISC_SHA1_DIGESTLENGTH + 3 * p_bytes); - - key->opaque = (void *) dsa; - - return (ISC_R_SUCCESS); -} - - -static isc_result_t -openssldsa_tofile(const dst_key_t *key, const char *directory) { - int cnt = 0; - DSA *dsa; - dst_private_t priv; - unsigned char bufs[5][128]; - - if (key->opaque == NULL) - return (DST_R_NULLKEY); - - dsa = (DSA *) key->opaque; - - priv.elements[cnt].tag = TAG_DSA_PRIME; - priv.elements[cnt].length = BN_num_bytes(dsa->p); - BN_bn2bin(dsa->p, bufs[cnt]); - priv.elements[cnt].data = bufs[cnt]; - cnt++; - - priv.elements[cnt].tag = TAG_DSA_SUBPRIME; - priv.elements[cnt].length = BN_num_bytes(dsa->q); - BN_bn2bin(dsa->q, bufs[cnt]); - priv.elements[cnt].data = bufs[cnt]; - cnt++; - - priv.elements[cnt].tag = TAG_DSA_BASE; - priv.elements[cnt].length = BN_num_bytes(dsa->g); - BN_bn2bin(dsa->g, bufs[cnt]); - priv.elements[cnt].data = bufs[cnt]; - cnt++; - - priv.elements[cnt].tag = TAG_DSA_PRIVATE; - priv.elements[cnt].length = BN_num_bytes(dsa->priv_key); - BN_bn2bin(dsa->priv_key, bufs[cnt]); - priv.elements[cnt].data = bufs[cnt]; - cnt++; - - priv.elements[cnt].tag = TAG_DSA_PUBLIC; - priv.elements[cnt].length = BN_num_bytes(dsa->pub_key); - BN_bn2bin(dsa->pub_key, bufs[cnt]); - priv.elements[cnt].data = bufs[cnt]; - cnt++; - - priv.nelements = cnt; - return (dst__privstruct_writefile(key, &priv, directory)); -} - -static isc_result_t -openssldsa_parse(dst_key_t *key, isc_lex_t *lexer) { - dst_private_t priv; - isc_result_t ret; - int i; - DSA *dsa = 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_DSA, lexer, mctx, &priv); - if (ret != ISC_R_SUCCESS) - return (ret); - - dsa = DSA_new(); - if (dsa == NULL) - DST_RET(ISC_R_NOMEMORY); - dsa->flags &= ~DSA_FLAG_CACHE_MONT_P; - key->opaque = dsa; - - 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_DSA_PRIME: - dsa->p = bn; - break; - case TAG_DSA_SUBPRIME: - dsa->q = bn; - break; - case TAG_DSA_BASE: - dsa->g = bn; - break; - case TAG_DSA_PRIVATE: - dsa->priv_key = bn; - break; - case TAG_DSA_PUBLIC: - dsa->pub_key = bn; - break; - } - } - dst__privstruct_free(&priv, mctx); - - key->key_size = BN_num_bits(dsa->p); - - return (ISC_R_SUCCESS); - - err: - openssldsa_destroy(key); - dst__privstruct_free(&priv, mctx); - memset(&priv, 0, sizeof(priv)); - return (ret); -} - -static dst_func_t openssldsa_functions = { - openssldsa_createctx, - openssldsa_destroyctx, - openssldsa_adddata, - openssldsa_sign, - openssldsa_verify, - NULL, /*%< computesecret */ - openssldsa_compare, - NULL, /*%< paramcompare */ - openssldsa_generate, - openssldsa_isprivate, - openssldsa_destroy, - openssldsa_todns, - openssldsa_fromdns, - openssldsa_tofile, - openssldsa_parse, - NULL, /*%< cleanup */ -}; - -isc_result_t -dst__openssldsa_init(dst_func_t **funcp) { - REQUIRE(funcp != NULL); - if (*funcp == NULL) - *funcp = &openssldsa_functions; - return (ISC_R_SUCCESS); -} - -#else /* OPENSSL */ - -#include <isc/util.h> - -EMPTY_TRANSLATION_UNIT - -#endif /* OPENSSL */ -/*! \file */ |
