static isc_result_t
opensslrsa_fromdns(dst_key_t *key, isc_buffer_t *data) {
RSA *rsa;
isc_region_t r;
unsigned int e_bytes;
#if USE_EVP
EVP_PKEY *pkey;
#endif
isc_buffer_remainingregion(data, &r);
if (r.length == 0)
return (ISC_R_SUCCESS);
rsa = RSA_new();
if (rsa == NULL)
return (dst__openssl_toresult(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);
#if USE_EVP
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);
#else
key->keydata.rsa = rsa;
#endif
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 USE_EVP
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));
#else
if (key->keydata.rsa == NULL)
return (DST_R_NULLKEY);
rsa = key->keydata.rsa;
#endif
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++;
if (rsa->d != NULL) {
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++;
}
if (rsa->p != NULL) {
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++;
}
if (rsa->q != NULL) {
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++;
}
if (rsa->dmp1 != NULL) {
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++;
}
if (rsa->dmq1 != NULL) {
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++;
}
if (rsa->iqmp != NULL) {
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++;
}
if (key->engine != NULL) {
priv.elements[i].tag = TAG_RSA_ENGINE;
priv.elements[i].length = 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 = strlen(key->label) + 1;
priv.elements[i].data = (unsigned char *)key->label;
i++;
}
priv.nelements = i;
result = dst__privstruct_writefile(key, &priv, directory);
fail:
#if USE_EVP
RSA_free(rsa);
#endif
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_generate(dst_key_t *key, int exp, void (*callback)(int)) {
#if OPENSSL_VERSION_NUMBER > 0x00908000L
BN_GENCB cb;
union {
void *dptr;
void (*fptr)(int);
} u;
RSA *rsa = RSA_new();
BIGNUM *e = BN_new();
#if USE_EVP
EVP_PKEY *pkey = EVP_PKEY_new();
#endif
if (rsa == NULL || e == NULL)
goto err;
#if USE_EVP
if (pkey == NULL)
goto err;
if (!EVP_PKEY_set1_RSA(pkey, rsa))
goto err;
#endif
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);
}
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);
SET_FLAGS(rsa);
#if USE_EVP
key->keydata.pkey = pkey;
RSA_free(rsa);
#else
key->keydata.rsa = rsa;
#endif
return (ISC_R_SUCCESS);
}
err:
#if USE_EVP
if (pkey != NULL)
EVP_PKEY_free(pkey);
#endif
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 USE_EVP
EVP_PKEY *pkey = EVP_PKEY_new();
UNUSED(callback);
if (pkey == NULL)
return (ISC_R_NOMEMORY);
#else
UNUSED(callback);
#endif
if (exp == 0)
e = RSA_F4;
else
e = 0x40000003;
rsa = RSA_generate_key(key->key_size, e, NULL, NULL);
if (rsa == NULL) {
#if USE_EVP
EVP_PKEY_free(pkey);
#endif
return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
}
SET_FLAGS(rsa);
#if USE_EVP
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);
#else
key->keydata.rsa = rsa;
#endif
return (ISC_R_SUCCESS);
#endif
}
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;
#if USE_EVP
EVP_PKEY *pkey;
#endif
#if USE_EVP
REQUIRE(key->keydata.pkey != NULL);
#else
REQUIRE(key->keydata.rsa != NULL);
#endif
#if USE_EVP
pkey = key->keydata.pkey;
rsa = EVP_PKEY_get1_RSA(pkey);
if (rsa == NULL)
return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
#else
rsa = key->keydata.rsa;
#endif
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)
DST_RET(ISC_R_NOSPACE);
isc_buffer_putuint8(data, (isc_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, (isc_uint16_t) e_bytes);
isc_region_consume(&r, 3);
}
if (r.length < e_bytes + mod_bytes)
DST_RET(ISC_R_NOSPACE);
BN_bn2bin(rsa->e, r.base);
isc_region_consume(&r, e_bytes);
BN_bn2bin(rsa->n, r.base);
isc_buffer_add(data, e_bytes + mod_bytes);
ret = ISC_R_SUCCESS;
err:
#if USE_EVP
if (rsa != NULL)
RSA_free(rsa);
#endif
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;
#if USE_EVP
EVP_PKEY *pkey;
#endif
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));
SET_FLAGS(rsa);
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 (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);
#if USE_EVP
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);
#else
key->keydata.rsa = rsa;
#endif
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;
int status = 0;
#if USE_EVP
EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
EVP_PKEY *pkey = key->keydata.pkey;
#else
/* note: ISC_SHA512_DIGESTLENGTH >= ISC_*_DIGESTLENGTH */
unsigned char digest[ISC_SHA512_DIGESTLENGTH];
int type = 0;
unsigned int digestlen = 0;
RSA *rsa = key->keydata.rsa;
#if OPENSSL_VERSION_NUMBER < 0x00908000L
unsigned int prefixlen = 0;
const unsigned char *prefix = NULL;
#endif
#endif
REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
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 USE_EVP
status = EVP_VerifyFinal(evp_md_ctx, sig->base, sig->length, pkey);
#else
switch (dctx->key->key_alg) {
case DST_ALG_RSAMD5:
{
isc_md5_t *md5ctx = dctx->ctxdata.md5ctx;
isc_md5_final(md5ctx, digest);
type = NID_md5;
digestlen = ISC_MD5_DIGESTLENGTH;
}
break;
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
{
isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
isc_sha1_final(sha1ctx, digest);
type = NID_sha1;
digestlen = ISC_SHA1_DIGESTLENGTH;
}
break;
case DST_ALG_RSASHA256:
{
isc_sha256_t *sha256ctx = dctx->ctxdata.sha256ctx;
isc_sha256_final(digest, sha256ctx);
digestlen = ISC_SHA256_DIGESTLENGTH;
#if OPENSSL_VERSION_NUMBER < 0x00908000L
prefix = sha256_prefix;
prefixlen = sizeof(sha256_prefix);
#else
type = NID_sha256;
#endif
}
break;
case DST_ALG_RSASHA512:
{
isc_sha512_t *sha512ctx = dctx->ctxdata.sha512ctx;
isc_sha512_final(digest, sha512ctx);
digestlen = ISC_SHA512_DIGESTLENGTH;
#if OPENSSL_VERSION_NUMBER < 0x00908000L
prefix = sha512_prefix;
prefixlen = sizeof(sha512_prefix);
#else
type = NID_sha512;
#endif
}
break;
default:
INSIST(0);
}
if (sig->length != (unsigned int) RSA_size(rsa))
return (DST_R_VERIFYFAILURE);
#if OPENSSL_VERSION_NUMBER < 0x00908000L
switch (dctx->key->key_alg) {
case DST_ALG_RSAMD5:
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
INSIST(type != 0);
status = RSA_verify(type, digest, digestlen, sig->base,
RSA_size(rsa), rsa);
break;
case DST_ALG_RSASHA256:
case DST_ALG_RSASHA512:
{
/*
* 1024 is big enough for all valid RSA bit sizes
* for use with DNSSEC.
*/
unsigned char original[PREFIXLEN + 1024];
INSIST(prefix != NULL);
INSIST(prefixlen != 0U);
if (RSA_size(rsa) > (int)sizeof(original))
return (DST_R_VERIFYFAILURE);
status = RSA_public_decrypt(sig->length, sig->base,
original, rsa,
RSA_PKCS1_PADDING);
if (status <= 0)
return (DST_R_VERIFYFAILURE);
if (status != (int)(prefixlen + digestlen))
return (DST_R_VERIFYFAILURE);
if (memcmp(original, prefix, prefixlen))
return (DST_R_VERIFYFAILURE);
if (memcmp(original + prefixlen, digest, digestlen))
return (DST_R_VERIFYFAILURE);
status = 1;
}
break;
default:
INSIST(0);
}
#else
INSIST(type != 0);
status = RSA_verify(type, digest, digestlen, sig->base,
RSA_size(rsa), rsa);
#endif
#endif
if (status != 1)
return (dst__openssl_toresult(DST_R_VERIFYFAILURE));
return (ISC_R_SUCCESS);
}
static isc_result_t
openssldsa_sign(dst_context_t *dctx, isc_buffer_t *sig) {
dst_key_t *key = dctx->key;
DSA *dsa = key->keydata.dsa;
isc_region_t r;
DSA_SIG *dsasig;
#if USE_EVP
EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
EVP_PKEY *pkey;
unsigned char *sigbuf;
const unsigned char *sb;
unsigned int siglen;
#else
isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
unsigned char digest[ISC_SHA1_DIGESTLENGTH];
#endif
isc_buffer_availableregion(sig, &r);
if (r.length < ISC_SHA1_DIGESTLENGTH * 2 + 1)
return (ISC_R_NOSPACE);
#if USE_EVP
pkey = EVP_PKEY_new();
if (pkey == NULL)
return (ISC_R_NOMEMORY);
if (!EVP_PKEY_set1_DSA(pkey, dsa)) {
EVP_PKEY_free(pkey);
return (ISC_R_FAILURE);
}
sigbuf = malloc(EVP_PKEY_size(pkey));
if (sigbuf == NULL) {
EVP_PKEY_free(pkey);
return (ISC_R_NOMEMORY);
}
if (!EVP_SignFinal(evp_md_ctx, sigbuf, &siglen, pkey)) {
EVP_PKEY_free(pkey);
free(sigbuf);
return (ISC_R_FAILURE);
}
INSIST(EVP_PKEY_size(pkey) >= (int) siglen);
EVP_PKEY_free(pkey);
/* Convert from Dss-Sig-Value (RFC2459). */
dsasig = DSA_SIG_new();
if (dsasig == NULL) {
free(sigbuf);
return (ISC_R_NOMEMORY);
}
sb = sigbuf;
if (d2i_DSA_SIG(&dsasig, &sb, (long) siglen) == NULL) {
free(sigbuf);
return (ISC_R_FAILURE);
}
free(sigbuf);
#elif 0
/* Only use EVP for the Digest */
if (!EVP_DigestFinal_ex(evp_md_ctx, digest, &siglen)) {
return (ISC_R_FAILURE);
}
dsasig = DSA_do_sign(digest, ISC_SHA1_DIGESTLENGTH, dsa);
if (dsasig == NULL)
return (dst__openssl_toresult(DST_R_SIGNFAILURE));
#else
isc_sha1_final(sha1ctx, digest);
dsasig = DSA_do_sign(digest, ISC_SHA1_DIGESTLENGTH, dsa);
if (dsasig == NULL)
return (dst__openssl_toresult(DST_R_SIGNFAILURE));
#endif
*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
openssldh_generate(dst_key_t *key, int generator, void (*callback)(int)) {
DH *dh = NULL;
#if OPENSSL_VERSION_NUMBER > 0x00908000L
BN_GENCB cb;
union {
void *dptr;
void (*fptr)(int);
} u;
#else
UNUSED(callback);
#endif
if (generator == 0) {
if (key->key_size == 768 ||
key->key_size == 1024 ||
key->key_size == 1536)
{
dh = DH_new();
if (dh == NULL)
return (dst__openssl_toresult(ISC_R_NOMEMORY));
if (key->key_size == 768)
dh->p = &bn768;
else if (key->key_size == 1024)
dh->p = &bn1024;
else
dh->p = &bn1536;
dh->g = &bn2;
} else
generator = 2;
}
if (generator != 0) {
#if OPENSSL_VERSION_NUMBER > 0x00908000L
dh = DH_new();
if (dh == NULL)
return (dst__openssl_toresult(ISC_R_NOMEMORY));
if (callback == NULL) {
BN_GENCB_set_old(&cb, NULL, NULL);
} else {
u.fptr = callback;
BN_GENCB_set(&cb, &progress_cb, u.dptr);
}
if (!DH_generate_parameters_ex(dh, key->key_size, generator,
&cb)) {
DH_free(dh);
return (dst__openssl_toresult2(
"DH_generate_parameters_ex",
DST_R_OPENSSLFAILURE));
}
#else
dh = DH_generate_parameters(key->key_size, generator,
NULL, NULL);
#endif
}
if (dh == NULL)
return (dst__openssl_toresult2("DH_generate_parameters",
DST_R_OPENSSLFAILURE));
if (DH_generate_key(dh) == 0) {
DH_free(dh);
return (dst__openssl_toresult2("DH_generate_key",
DST_R_OPENSSLFAILURE));
}
dh->flags &= ~DH_FLAG_CACHE_MONT_P;
key->keydata.dh = dh;
return (ISC_R_SUCCESS);
}
static isc_result_t
opensslecdsa_verify(dst_context_t *dctx, const isc_region_t *sig) {
isc_result_t ret;
dst_key_t *key = dctx->key;
int status;
unsigned char *cp = sig->base;
ECDSA_SIG *ecdsasig = NULL;
EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
EVP_PKEY *pkey = key->keydata.pkey;
EC_KEY *eckey = EVP_PKEY_get1_EC_KEY(pkey);
unsigned int dgstlen, siglen;
unsigned char digest[EVP_MAX_MD_SIZE];
REQUIRE(key->key_alg == DST_ALG_ECDSA256 ||
key->key_alg == DST_ALG_ECDSA384);
if (eckey == NULL)
return (ISC_R_FAILURE);
if (key->key_alg == DST_ALG_ECDSA256)
siglen = DNS_SIG_ECDSA256SIZE;
else
siglen = DNS_SIG_ECDSA384SIZE;
if (sig->length != siglen)
return (DST_R_VERIFYFAILURE);
if (!EVP_DigestFinal_ex(evp_md_ctx, digest, &dgstlen))
DST_RET (dst__openssl_toresult3(dctx->category,
"EVP_DigestFinal_ex",
ISC_R_FAILURE));
ecdsasig = ECDSA_SIG_new();
if (ecdsasig == NULL)
DST_RET (ISC_R_NOMEMORY);
if (ecdsasig->r != NULL)
BN_free(ecdsasig->r);
ecdsasig->r = BN_bin2bn(cp, siglen / 2, NULL);
cp += siglen / 2;
if (ecdsasig->s != NULL)
BN_free(ecdsasig->s);
ecdsasig->s = BN_bin2bn(cp, siglen / 2, NULL);
/* cp += siglen / 2; */
status = ECDSA_do_verify(digest, dgstlen, ecdsasig, eckey);
switch (status) {
case 1:
ret = ISC_R_SUCCESS;
break;
case 0:
ret = dst__openssl_toresult(DST_R_VERIFYFAILURE);
break;
default:
ret = dst__openssl_toresult3(dctx->category,
"ECDSA_do_verify",
DST_R_VERIFYFAILURE);
break;
}
err:
if (ecdsasig != NULL)
ECDSA_SIG_free(ecdsasig);
if (eckey != NULL)
EC_KEY_free(eckey);
return (ret);
}
static isc_result_t
opensslecdsa_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
dst_private_t priv;
isc_result_t ret;
EVP_PKEY *pkey;
EC_KEY *eckey = NULL;
BIGNUM *privkey = NULL;
int group_nid;
isc_mem_t *mctx = key->mctx;
REQUIRE(key->key_alg == DST_ALG_ECDSA256 ||
key->key_alg == DST_ALG_ECDSA384);
/* read private key file */
ret = dst__privstruct_parse(key, DST_ALG_ECDSA256, 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;
dst__privstruct_free(&priv, mctx);
memset(&priv, 0, sizeof(priv));
return (ISC_R_SUCCESS);
}
if (key->key_alg == DST_ALG_ECDSA256)
group_nid = NID_X9_62_prime256v1;
else
group_nid = NID_secp384r1;
eckey = EC_KEY_new_by_curve_name(group_nid);
if (eckey == NULL)
return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
privkey = BN_bin2bn(priv.elements[0].data,
priv.elements[0].length, NULL);
if (privkey == NULL)
DST_RET(ISC_R_NOMEMORY);
if (!EC_KEY_set_private_key(eckey, privkey))
DST_RET(ISC_R_NOMEMORY);
if (ecdsa_check(eckey, pub) != ISC_R_SUCCESS)
DST_RET(DST_R_INVALIDPRIVATEKEY);
pkey = EVP_PKEY_new();
if (pkey == NULL)
DST_RET (ISC_R_NOMEMORY);
if (!EVP_PKEY_set1_EC_KEY(pkey, eckey)) {
EVP_PKEY_free(pkey);
DST_RET (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
}
key->keydata.pkey = pkey;
if (key->key_alg == DST_ALG_ECDSA256)
key->key_size = DNS_KEY_ECDSA256SIZE * 4;
else
key->key_size = DNS_KEY_ECDSA384SIZE * 4;
ret = ISC_R_SUCCESS;
err:
if (privkey != NULL)
BN_clear_free(privkey);
if (eckey != NULL)
EC_KEY_free(eckey);
dst__privstruct_free(&priv, mctx);
memset(&priv, 0, sizeof(priv));
return (ret);
}
static isc_result_t
opensslrsa_generate(dst_key_t *key, int exp, void (*callback)(int)) {
#if OPENSSL_VERSION_NUMBER > 0x00908000L
isc_result_t ret = DST_R_OPENSSLFAILURE;
union {
void *dptr;
void (*fptr)(int);
} u;
RSA *rsa = RSA_new();
BIGNUM *e = BN_new();
#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
BN_GENCB _cb;
#endif
BN_GENCB *cb = BN_GENCB_new();
#if USE_EVP
EVP_PKEY *pkey = EVP_PKEY_new();
#endif
/*
* Reject incorrect RSA key lengths.
*/
switch (key->key_alg) {
case DST_ALG_RSAMD5:
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:
INSIST(0);
}
if (rsa == NULL || e == NULL || cb == NULL)
goto err;
#if USE_EVP
if (pkey == NULL)
goto err;
if (!EVP_PKEY_set1_RSA(pkey, rsa))
goto err;
#endif
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);
SET_FLAGS(rsa);
#if USE_EVP
key->keydata.pkey = pkey;
RSA_free(rsa);
#else
key->keydata.rsa = rsa;
#endif
return (ISC_R_SUCCESS);
}
BN_GENCB_free(cb);
ret = dst__openssl_toresult2("RSA_generate_key_ex",
DST_R_OPENSSLFAILURE);
err:
#if USE_EVP
if (pkey != NULL)
EVP_PKEY_free(pkey);
#endif
if (e != NULL)
BN_free(e);
if (rsa != NULL)
RSA_free(rsa);
if (cb != NULL)
BN_GENCB_free(cb);
return (dst__openssl_toresult(ret));
#else
RSA *rsa;
unsigned long e;
#if USE_EVP
EVP_PKEY *pkey = EVP_PKEY_new();
UNUSED(callback);
if (pkey == NULL)
return (ISC_R_NOMEMORY);
#else
UNUSED(callback);
#endif
if (exp == 0)
e = RSA_F4;
else
e = 0x40000003;
rsa = RSA_generate_key(key->key_size, e, NULL, NULL);
if (rsa == NULL) {
#if USE_EVP
EVP_PKEY_free(pkey);
#endif
return (dst__openssl_toresult2("RSA_generate_key",
DST_R_OPENSSLFAILURE));
}
SET_FLAGS(rsa);
#if USE_EVP
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);
#else
key->keydata.rsa = rsa;
#endif
return (ISC_R_SUCCESS);
#endif
}
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;
#ifdef USE_ENGINE
ENGINE *ep = NULL;
const BIGNUM *ex = NULL;
#endif
isc_mem_t *mctx = key->mctx;
const char *engine = NULL, *label = NULL;
#if defined(USE_ENGINE) || USE_EVP
EVP_PKEY *pkey = NULL;
#endif
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);
memset(&priv, 0, sizeof(priv));
return (ISC_R_SUCCESS);
}
#if USE_EVP
if (pub != NULL && pub->keydata.pkey != NULL)
pubrsa = EVP_PKEY_get1_RSA(pub->keydata.pkey);
#else
if (pub != NULL && pub->keydata.rsa != NULL) {
pubrsa = pub->keydata.rsa;
pub->keydata.rsa = NULL;
}
#endif
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) {
#ifdef USE_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);
if (key->engine == NULL)
DST_RET(ISC_R_NOMEMORY);
key->label = isc_mem_strdup(key->mctx, label);
if (key->label == NULL)
DST_RET(ISC_R_NOMEMORY);
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);
#if USE_EVP
key->keydata.pkey = pkey;
RSA_free(rsa);
#else
key->keydata.rsa = rsa;
EVP_PKEY_free(pkey);
#endif
dst__privstruct_free(&priv, mctx);
memset(&priv, 0, sizeof(priv));
return (ISC_R_SUCCESS);
#else
DST_RET(DST_R_NOENGINE);
#endif
}
rsa = RSA_new();
if (rsa == NULL)
DST_RET(ISC_R_NOMEMORY);
SET_FLAGS(rsa);
#if USE_EVP
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;
#else
key->keydata.rsa = rsa;
#endif
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);
memset(&priv, 0, 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);
#if USE_EVP
RSA_free(rsa);
#endif
return (ISC_R_SUCCESS);
err:
#if USE_EVP
if (pkey != NULL)
EVP_PKEY_free(pkey);
#endif
if (rsa != NULL)
RSA_free(rsa);
if (pubrsa != NULL)
RSA_free(pubrsa);
key->keydata.generic = NULL;
dst__privstruct_free(&priv, mctx);
memset(&priv, 0, sizeof(priv));
return (ret);
}
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 USE_EVP
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));
#else
if (key->keydata.rsa == NULL)
return (DST_R_NULLKEY);
rsa = key->keydata.rsa;
#endif
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);
if (key->external) {
priv.nelements = 0;
result = dst__privstruct_writefile(key, &priv, directory);
goto fail;
}
for (i = 0; i < 8; i++) {
bufs[i] = isc_mem_get(key->mctx, BN_num_bytes(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(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);
fail:
#if USE_EVP
RSA_free(rsa);
#endif
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
openssldsa_verify(dst_context_t *dctx, const isc_region_t *sig) {
dst_key_t *key = dctx->key;
DSA *dsa = key->keydata.dsa;
int status = 0;
unsigned char *cp = sig->base;
DSA_SIG *dsasig;
#if USE_EVP
EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
#if 0
EVP_PKEY *pkey;
unsigned char *sigbuf;
#endif
unsigned int siglen;
#else
isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
#endif
unsigned char digest[ISC_SHA1_DIGESTLENGTH];
#if USE_EVP
#if 1
/* Only use EVP for the digest */
if (!EVP_DigestFinal_ex(evp_md_ctx, digest, &siglen)) {
return (ISC_R_FAILURE);
}
#endif
#else
isc_sha1_final(sha1ctx, digest);
#endif
if (sig->length != 2 * ISC_SHA1_DIGESTLENGTH + 1) {
return (DST_R_VERIFYFAILURE);
}
cp++; /*%< Skip T */
dsasig = DSA_SIG_new();
if (dsasig == NULL)
return (ISC_R_NOMEMORY);
dsasig->r = BN_bin2bn(cp, ISC_SHA1_DIGESTLENGTH, NULL);
cp += ISC_SHA1_DIGESTLENGTH;
dsasig->s = BN_bin2bn(cp, ISC_SHA1_DIGESTLENGTH, NULL);
#if 0
pkey = EVP_PKEY_new();
if (pkey == NULL)
return (ISC_R_NOMEMORY);
if (!EVP_PKEY_set1_DSA(pkey, dsa)) {
EVP_PKEY_free(pkey);
return (ISC_R_FAILURE);
}
/* Convert to Dss-Sig-Value (RFC2459). */
sigbuf = malloc(EVP_PKEY_size(pkey) + 50);
if (sigbuf == NULL) {
EVP_PKEY_free(pkey);
return (ISC_R_NOMEMORY);
}
siglen = (unsigned) i2d_DSA_SIG(dsasig, &sigbuf);
INSIST(EVP_PKEY_size(pkey) >= (int) siglen);
status = EVP_VerifyFinal(evp_md_ctx, sigbuf, siglen, pkey);
EVP_PKEY_free(pkey);
free(sigbuf);
#else
status = DSA_do_verify(digest, ISC_SHA1_DIGESTLENGTH, dsasig, dsa);
#endif
DSA_SIG_free(dsasig);
switch (status) {
case 1:
return (ISC_R_SUCCESS);
case 0:
return (dst__openssl_toresult(DST_R_VERIFYFAILURE));
default:
return (dst__openssl_toresult3(dctx->category,
"DSA_do_verify",
DST_R_VERIFYFAILURE));
}
}
static isc_result_t
opensslrsa_fromlabel(dst_key_t *key, const char *engine, const char *label,
const char *pin)
{
#ifdef USE_ENGINE
ENGINE *e = NULL;
isc_result_t ret;
EVP_PKEY *pkey = NULL;
RSA *rsa = NULL, *pubrsa = NULL;
char *colon;
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(ISC_R_NOTFOUND);
if (engine != NULL) {
key->engine = isc_mem_strdup(key->mctx, engine);
if (key->engine == NULL)
DST_RET(ISC_R_NOMEMORY);
} else {
key->engine = isc_mem_strdup(key->mctx, label);
if (key->engine == NULL)
DST_RET(ISC_R_NOMEMORY);
colon = strchr(key->engine, ':');
if (colon != NULL)
*colon = '\0';
}
key->label = isc_mem_strdup(key->mctx, label);
if (key->label == NULL)
DST_RET(ISC_R_NOMEMORY);
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);
if (pubrsa != NULL)
RSA_free(pubrsa);
key->key_size = EVP_PKEY_bits(pkey);
#if USE_EVP
key->keydata.pkey = pkey;
RSA_free(rsa);
#else
key->keydata.rsa = rsa;
EVP_PKEY_free(pkey);
#endif
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
UNUSED(key);
UNUSED(engine);
UNUSED(label);
UNUSED(pin);
return(DST_R_NOENGINE);
#endif
}
static isc_result_t
openssldsa_generate(dst_key_t *key, int unused, void (*callback)(int)) {
DSA *dsa;
unsigned char rand_array[ISC_SHA1_DIGESTLENGTH];
isc_result_t result;
#if OPENSSL_VERSION_NUMBER > 0x00908000L
BN_GENCB *cb;
#if OPENSSL_VERSION_NUMBER < 0x10100000L
BN_GENCB _cb;
#endif
union {
void *dptr;
void (*fptr)(int);
} u;
#else
UNUSED(callback);
#endif
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));
cb = BN_GENCB_new();
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
if (cb == NULL) {
DSA_free(dsa);
return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
}
#endif
if (callback == NULL) {
BN_GENCB_set_old(cb, NULL, NULL);
} else {
u.fptr = callback;
BN_GENCB_set(cb, &progress_cb, u.dptr);
}
if (!DSA_generate_parameters_ex(dsa, key->key_size, rand_array,
ISC_SHA1_DIGESTLENGTH, NULL, NULL,
cb))
{
DSA_free(dsa);
BN_GENCB_free(cb);
return (dst__openssl_toresult2("DSA_generate_parameters_ex",
DST_R_OPENSSLFAILURE));
}
BN_GENCB_free(cb);
#else
dsa = DSA_generate_parameters(key->key_size, rand_array,
ISC_SHA1_DIGESTLENGTH, NULL, NULL,
NULL, NULL);
if (dsa == NULL)
return (dst__openssl_toresult2("DSA_generate_parameters",
DST_R_OPENSSLFAILURE));
#endif
if (DSA_generate_key(dsa) == 0) {
DSA_free(dsa);
return (dst__openssl_toresult2("DSA_generate_key",
DST_R_OPENSSLFAILURE));
}
dsa->flags &= ~DSA_FLAG_CACHE_MONT_P;
key->keydata.dsa = dsa;
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;
#if USE_EVP
EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
EVP_PKEY *pkey = key->keydata.pkey;
#else
RSA *rsa = key->keydata.rsa;
/* note: ISC_SHA512_DIGESTLENGTH >= ISC_*_DIGESTLENGTH */
unsigned char digest[PREFIXLEN + ISC_SHA512_DIGESTLENGTH];
int status;
int type = 0;
unsigned int digestlen = 0;
char *message;
unsigned long err;
const char* file;
int line;
#if OPENSSL_VERSION_NUMBER < 0x00908000L
unsigned int prefixlen = 0;
const unsigned char *prefix = NULL;
#endif
#endif
REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
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 USE_EVP
if (r.length < (unsigned int) EVP_PKEY_size(pkey))
return (ISC_R_NOSPACE);
if (!EVP_SignFinal(evp_md_ctx, r.base, &siglen, pkey)) {
return (ISC_R_FAILURE);
}
#else
if (r.length < (unsigned int) RSA_size(rsa))
return (ISC_R_NOSPACE);
switch (dctx->key->key_alg) {
case DST_ALG_RSAMD5:
{
isc_md5_t *md5ctx = dctx->ctxdata.md5ctx;
isc_md5_final(md5ctx, digest);
type = NID_md5;
digestlen = ISC_MD5_DIGESTLENGTH;
}
break;
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
{
isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
isc_sha1_final(sha1ctx, digest);
type = NID_sha1;
digestlen = ISC_SHA1_DIGESTLENGTH;
}
break;
case DST_ALG_RSASHA256:
{
isc_sha256_t *sha256ctx = dctx->ctxdata.sha256ctx;
isc_sha256_final(digest, sha256ctx);
digestlen = ISC_SHA256_DIGESTLENGTH;
#if OPENSSL_VERSION_NUMBER < 0x00908000L
prefix = sha256_prefix;
prefixlen = sizeof(sha256_prefix);
#else
type = NID_sha256;
#endif
}
break;
case DST_ALG_RSASHA512:
{
isc_sha512_t *sha512ctx = dctx->ctxdata.sha512ctx;
isc_sha512_final(digest, sha512ctx);
digestlen = ISC_SHA512_DIGESTLENGTH;
#if OPENSSL_VERSION_NUMBER < 0x00908000L
prefix = sha512_prefix;
prefixlen = sizeof(sha512_prefix);
#else
type = NID_sha512;
#endif
}
break;
default:
INSIST(0);
}
#if OPENSSL_VERSION_NUMBER < 0x00908000L
switch (dctx->key->key_alg) {
case DST_ALG_RSAMD5:
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
INSIST(type != 0);
status = RSA_sign(type, digest, digestlen, r.base,
&siglen, rsa);
break;
case DST_ALG_RSASHA256:
case DST_ALG_RSASHA512:
INSIST(prefix != NULL);
INSIST(prefixlen != 0);
INSIST(prefixlen + digestlen <= sizeof(digest));
memmove(digest + prefixlen, digest, digestlen);
memcpy(digest, prefix, prefixlen);
status = RSA_private_encrypt(digestlen + prefixlen,
digest, r.base, rsa,
RSA_PKCS1_PADDING);
if (status < 0)
status = 0;
else
siglen = status;
break;
default:
INSIST(0);
}
#else
INSIST(type != 0);
status = RSA_sign(type, digest, digestlen, r.base, &siglen, rsa);
#endif
if (status == 0) {
err = ERR_peek_error_line(&file, &line);
if (err != 0U) {
message = ERR_error_string(err, NULL);
}
return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
}
#endif
isc_buffer_add(sig, siglen);
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;
#ifdef USE_ENGINE
ENGINE *e = NULL;
#endif
isc_mem_t *mctx = key->mctx;
const char *engine = NULL, *label = NULL;
#if defined(USE_ENGINE) || USE_EVP
EVP_PKEY *pkey = NULL;
#endif
#if USE_EVP
if (pub != NULL && pub->keydata.pkey != NULL)
pubrsa = EVP_PKEY_get1_RSA(pub->keydata.pkey);
#else
if (pub != NULL && pub->keydata.rsa != NULL) {
pubrsa = pub->keydata.rsa;
pub->keydata.rsa = NULL;
}
#endif
/* read private key file */
ret = dst__privstruct_parse(key, DST_ALG_RSA, lexer, mctx, &priv);
if (ret != ISC_R_SUCCESS)
return (ret);
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) {
#ifdef USE_ENGINE
if (engine == NULL)
DST_RET(DST_R_NOENGINE);
e = dst__openssl_getengine(engine);
if (e == NULL)
DST_RET(DST_R_NOENGINE);
pkey = ENGINE_load_private_key(e, label, NULL, NULL);
if (pkey == NULL) {
/* ERR_print_errors_fp(stderr); */
DST_RET(ISC_R_NOTFOUND);
}
key->engine = isc_mem_strdup(key->mctx, engine);
if (key->engine == NULL)
DST_RET(ISC_R_NOMEMORY);
key->label = isc_mem_strdup(key->mctx, label);
if (key->label == NULL)
DST_RET(ISC_R_NOMEMORY);
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);
if (pubrsa != NULL)
RSA_free(pubrsa);
key->key_size = EVP_PKEY_bits(pkey);
#if USE_EVP
key->keydata.pkey = pkey;
RSA_free(rsa);
#else
key->keydata.rsa = rsa;
EVP_PKEY_free(pkey);
#endif
dst__privstruct_free(&priv, mctx);
memset(&priv, 0, sizeof(priv));
return (ISC_R_SUCCESS);
#else
DST_RET(DST_R_NOENGINE);
#endif
}
rsa = RSA_new();
if (rsa == NULL)
DST_RET(ISC_R_NOMEMORY);
SET_FLAGS(rsa);
#if USE_EVP
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;
#else
key->keydata.rsa = rsa;
#endif
for (i = 0; i < priv.nelements; i++) {
BIGNUM *bn;
switch (priv.elements[i].tag) {
case TAG_RSA_ENGINE:
continue;
case TAG_RSA_LABEL:
continue;
case TAG_RSA_PIN:
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:
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);
memset(&priv, 0, sizeof(priv));
if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS)
DST_RET(DST_R_INVALIDPRIVATEKEY);
key->key_size = BN_num_bits(rsa->n);
if (pubrsa != NULL)
RSA_free(pubrsa);
#if USE_EVP
RSA_free(rsa);
#endif
return (ISC_R_SUCCESS);
err:
#if USE_EVP
if (pkey != NULL)
EVP_PKEY_free(pkey);
#endif
if (rsa != NULL)
RSA_free(rsa);
if (pubrsa != NULL)
RSA_free(pubrsa);
opensslrsa_destroy(key);
dst__privstruct_free(&priv, mctx);
memset(&priv, 0, sizeof(priv));
return (ret);
}
static isc_result_t
opensslgost_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
dst_private_t priv;
isc_result_t ret;
isc_mem_t *mctx = key->mctx;
EVP_PKEY *pkey = NULL;
EC_KEY *eckey;
const EC_POINT *pubkey = NULL;
BIGNUM *privkey = NULL;
const unsigned char *p;
/* read private key file */
ret = dst__privstruct_parse(key, DST_ALG_ECCGOST, lexer, mctx, &priv);
if (ret != ISC_R_SUCCESS)
return (ret);
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);
memset(&priv, 0, sizeof(priv));
return (ISC_R_SUCCESS);
}
INSIST((priv.elements[0].tag == TAG_GOST_PRIVASN1) ||
(priv.elements[0].tag == TAG_GOST_PRIVRAW));
if (priv.elements[0].tag == TAG_GOST_PRIVASN1) {
p = priv.elements[0].data;
if (d2i_PrivateKey(NID_id_GostR3410_2001, &pkey, &p,
(long) priv.elements[0].length) == NULL)
DST_RET(dst__openssl_toresult2(
"d2i_PrivateKey",
DST_R_INVALIDPRIVATEKEY));
} else {
if ((pub != NULL) && (pub->keydata.pkey != NULL)) {
eckey = EVP_PKEY_get0(pub->keydata.pkey);
pubkey = EC_KEY_get0_public_key(eckey);
}
privkey = BN_bin2bn(priv.elements[0].data,
priv.elements[0].length, NULL);
if (privkey == NULL)
DST_RET(ISC_R_NOMEMORY);
/* can't create directly the whole key */
p = gost_dummy_key;
if (d2i_PrivateKey(NID_id_GostR3410_2001, &pkey, &p,
(long) sizeof(gost_dummy_key)) == NULL)
DST_RET(dst__openssl_toresult2(
"d2i_PrivateKey",
DST_R_INVALIDPRIVATEKEY));
eckey = EVP_PKEY_get0(pkey);
if (eckey == NULL)
return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
if (!EC_KEY_set_private_key(eckey, privkey))
DST_RET(ISC_R_NOMEMORY);
/* have to (re)set the public key */
#ifdef notyet
(void) gost2001_compute_public(eckey);
#else
if ((pubkey != NULL) && !EC_KEY_set_public_key(eckey, pubkey))
DST_RET(ISC_R_NOMEMORY);
#endif
BN_clear_free(privkey);
privkey = NULL;
}
key->keydata.pkey = pkey;
key->key_size = EVP_PKEY_bits(pkey);
dst__privstruct_free(&priv, mctx);
memset(&priv, 0, sizeof(priv));
return (ISC_R_SUCCESS);
err:
if (privkey != NULL)
BN_clear_free(privkey);
if (pkey != NULL)
EVP_PKEY_free(pkey);
opensslgost_destroy(key);
dst__privstruct_free(&priv, mctx);
memset(&priv, 0, sizeof(priv));
return (ret);
}
