/**
* Setup key and digest for verification. Adjust sig if necessary.
*
* @param algo: key algorithm
* @param evp_key: EVP PKEY public key to create.
* @param digest_type: digest type to use
* @param key: key to setup for.
* @param keylen: length of key.
* @return false on failure.
*/
static int
setup_key_digest(int algo, EVP_PKEY** evp_key, const EVP_MD** digest_type,
unsigned char* key, size_t keylen)
{
#if defined(USE_DSA) && defined(USE_SHA1)
DSA* dsa;
#endif
RSA* rsa;
switch(algo) {
#if defined(USE_DSA) && defined(USE_SHA1)
case LDNS_DSA:
case LDNS_DSA_NSEC3:
*evp_key = EVP_PKEY_new();
if(!*evp_key) {
log_err("verify: malloc failure in crypto");
return 0;
}
dsa = sldns_key_buf2dsa_raw(key, keylen);
if(!dsa) {
verbose(VERB_QUERY, "verify: "
"sldns_key_buf2dsa_raw failed");
return 0;
}
if(EVP_PKEY_assign_DSA(*evp_key, dsa) == 0) {
verbose(VERB_QUERY, "verify: "
"EVP_PKEY_assign_DSA failed");
return 0;
}
#ifdef HAVE_EVP_DSS1
*digest_type = EVP_dss1();
#else
*digest_type = EVP_sha1();
#endif
break;
#endif /* USE_DSA && USE_SHA1 */
#if defined(USE_SHA1) || (defined(HAVE_EVP_SHA256) && defined(USE_SHA2)) || (defined(HAVE_EVP_SHA512) && defined(USE_SHA2))
#ifdef USE_SHA1
case LDNS_RSASHA1:
case LDNS_RSASHA1_NSEC3:
#endif
#if defined(HAVE_EVP_SHA256) && defined(USE_SHA2)
case LDNS_RSASHA256:
#endif
#if defined(HAVE_EVP_SHA512) && defined(USE_SHA2)
case LDNS_RSASHA512:
#endif
*evp_key = EVP_PKEY_new();
if(!*evp_key) {
log_err("verify: malloc failure in crypto");
return 0;
}
rsa = sldns_key_buf2rsa_raw(key, keylen);
if(!rsa) {
verbose(VERB_QUERY, "verify: "
"sldns_key_buf2rsa_raw SHA failed");
return 0;
}
if(EVP_PKEY_assign_RSA(*evp_key, rsa) == 0) {
verbose(VERB_QUERY, "verify: "
"EVP_PKEY_assign_RSA SHA failed");
return 0;
}
/* select SHA version */
#if defined(HAVE_EVP_SHA256) && defined(USE_SHA2)
if(algo == LDNS_RSASHA256)
*digest_type = EVP_sha256();
else
#endif
#if defined(HAVE_EVP_SHA512) && defined(USE_SHA2)
if(algo == LDNS_RSASHA512)
*digest_type = EVP_sha512();
else
#endif
#ifdef USE_SHA1
*digest_type = EVP_sha1();
#else
{ verbose(VERB_QUERY, "no digest available"); return 0; }
#endif
break;
#endif /* defined(USE_SHA1) || (defined(HAVE_EVP_SHA256) && defined(USE_SHA2)) || (defined(HAVE_EVP_SHA512) && defined(USE_SHA2)) */
case LDNS_RSAMD5:
*evp_key = EVP_PKEY_new();
if(!*evp_key) {
log_err("verify: malloc failure in crypto");
return 0;
}
rsa = sldns_key_buf2rsa_raw(key, keylen);
if(!rsa) {
verbose(VERB_QUERY, "verify: "
"sldns_key_buf2rsa_raw MD5 failed");
return 0;
}
if(EVP_PKEY_assign_RSA(*evp_key, rsa) == 0) {
verbose(VERB_QUERY, "verify: "
"EVP_PKEY_assign_RSA MD5 failed");
return 0;
}
*digest_type = EVP_md5();
break;
#ifdef USE_GOST
case LDNS_ECC_GOST:
*evp_key = sldns_gost2pkey_raw(key, keylen);
if(!*evp_key) {
verbose(VERB_QUERY, "verify: "
"sldns_gost2pkey_raw failed");
return 0;
}
*digest_type = EVP_get_digestbyname("md_gost94");
if(!*digest_type) {
verbose(VERB_QUERY, "verify: "
"EVP_getdigest md_gost94 failed");
return 0;
}
break;
#endif
#ifdef USE_ECDSA
case LDNS_ECDSAP256SHA256:
*evp_key = sldns_ecdsa2pkey_raw(key, keylen,
LDNS_ECDSAP256SHA256);
if(!*evp_key) {
verbose(VERB_QUERY, "verify: "
"sldns_ecdsa2pkey_raw failed");
return 0;
}
#ifdef USE_ECDSA_EVP_WORKAROUND
*digest_type = &ecdsa_evp_256_md;
#else
*digest_type = EVP_sha256();
#endif
break;
case LDNS_ECDSAP384SHA384:
*evp_key = sldns_ecdsa2pkey_raw(key, keylen,
LDNS_ECDSAP384SHA384);
if(!*evp_key) {
verbose(VERB_QUERY, "verify: "
"sldns_ecdsa2pkey_raw failed");
return 0;
}
#ifdef USE_ECDSA_EVP_WORKAROUND
*digest_type = &ecdsa_evp_384_md;
#else
*digest_type = EVP_sha384();
#endif
break;
#endif /* USE_ECDSA */
#ifdef USE_ED25519
case LDNS_ED25519:
*evp_key = sldns_ed255192pkey_raw(key, keylen);
if(!*evp_key) {
verbose(VERB_QUERY, "verify: "
"sldns_ed255192pkey_raw failed");
return 0;
}
*digest_type = NULL;
break;
#endif /* USE_ED25519 */
default:
verbose(VERB_QUERY, "verify: unknown algorithm %d",
algo);
return 0;
}
return 1;
}
/**
* Setup key and digest for verification. Adjust sig if necessary.
*
* @param algo: key algorithm
* @param evp_key: EVP PKEY public key to create.
* @param digest_type: digest type to use
* @param key: key to setup for.
* @param keylen: length of key.
* @return false on failure.
*/
static int
setup_key_digest(int algo, EVP_PKEY** evp_key, const EVP_MD** digest_type,
unsigned char* key, size_t keylen)
{
DSA* dsa;
RSA* rsa;
switch(algo) {
case LDNS_DSA:
case LDNS_DSA_NSEC3:
*evp_key = EVP_PKEY_new();
if(!*evp_key) {
log_err("verify: malloc failure in crypto");
return 0;
}
dsa = sldns_key_buf2dsa_raw(key, keylen);
if(!dsa) {
verbose(VERB_QUERY, "verify: "
"sldns_key_buf2dsa_raw failed");
return 0;
}
if(EVP_PKEY_assign_DSA(*evp_key, dsa) == 0) {
verbose(VERB_QUERY, "verify: "
"EVP_PKEY_assign_DSA failed");
return 0;
}
#ifdef HAVE_EVP_DSS1
*digest_type = EVP_dss1();
#else
*digest_type = EVP_sha1();
#endif
break;
case LDNS_RSASHA1:
case LDNS_RSASHA1_NSEC3:
#if defined(HAVE_EVP_SHA256) && defined(USE_SHA2)
case LDNS_RSASHA256:
#endif
#if defined(HAVE_EVP_SHA512) && defined(USE_SHA2)
case LDNS_RSASHA512:
#endif
*evp_key = EVP_PKEY_new();
if(!*evp_key) {
log_err("verify: malloc failure in crypto");
return 0;
}
rsa = sldns_key_buf2rsa_raw(key, keylen);
if(!rsa) {
verbose(VERB_QUERY, "verify: "
"sldns_key_buf2rsa_raw SHA failed");
return 0;
}
if(EVP_PKEY_assign_RSA(*evp_key, rsa) == 0) {
verbose(VERB_QUERY, "verify: "
"EVP_PKEY_assign_RSA SHA failed");
return 0;
}
/* select SHA version */
#if defined(HAVE_EVP_SHA256) && defined(USE_SHA2)
if(algo == LDNS_RSASHA256)
*digest_type = EVP_sha256();
else
#endif
#if defined(HAVE_EVP_SHA512) && defined(USE_SHA2)
if(algo == LDNS_RSASHA512)
*digest_type = EVP_sha512();
else
#endif
*digest_type = EVP_sha1();
break;
case LDNS_RSAMD5:
*evp_key = EVP_PKEY_new();
if(!*evp_key) {
log_err("verify: malloc failure in crypto");
return 0;
}
rsa = sldns_key_buf2rsa_raw(key, keylen);
if(!rsa) {
verbose(VERB_QUERY, "verify: "
"sldns_key_buf2rsa_raw MD5 failed");
return 0;
}
if(EVP_PKEY_assign_RSA(*evp_key, rsa) == 0) {
verbose(VERB_QUERY, "verify: "
"EVP_PKEY_assign_RSA MD5 failed");
return 0;
}
*digest_type = EVP_md5();
break;
#ifdef USE_GOST
case LDNS_ECC_GOST:
*evp_key = sldns_gost2pkey_raw(key, keylen);
if(!*evp_key) {
verbose(VERB_QUERY, "verify: "
"sldns_gost2pkey_raw failed");
return 0;
}
*digest_type = EVP_get_digestbyname("md_gost94");
if(!*digest_type) {
verbose(VERB_QUERY, "verify: "
"EVP_getdigest md_gost94 failed");
return 0;
}
break;
#endif
#ifdef USE_ECDSA
case LDNS_ECDSAP256SHA256:
*evp_key = sldns_ecdsa2pkey_raw(key, keylen,
LDNS_ECDSAP256SHA256);
if(!*evp_key) {
verbose(VERB_QUERY, "verify: "
"sldns_ecdsa2pkey_raw failed");
return 0;
}
#ifdef USE_ECDSA_EVP_WORKAROUND
/* openssl before 1.0.0 fixes RSA with the SHA256
* hash in EVP. We create one for ecdsa_sha256 */
{
static int md_ecdsa_256_done = 0;
static EVP_MD md;
if(!md_ecdsa_256_done) {
EVP_MD m = *EVP_sha256();
md_ecdsa_256_done = 1;
m.required_pkey_type[0] = (*evp_key)->type;
m.verify = (void*)ECDSA_verify;
md = m;
}
*digest_type = &md;
}
#else
*digest_type = EVP_sha256();
#endif
break;
case LDNS_ECDSAP384SHA384:
*evp_key = sldns_ecdsa2pkey_raw(key, keylen,
LDNS_ECDSAP384SHA384);
if(!*evp_key) {
verbose(VERB_QUERY, "verify: "
"sldns_ecdsa2pkey_raw failed");
return 0;
}
#ifdef USE_ECDSA_EVP_WORKAROUND
/* openssl before 1.0.0 fixes RSA with the SHA384
* hash in EVP. We create one for ecdsa_sha384 */
{
static int md_ecdsa_384_done = 0;
static EVP_MD md;
if(!md_ecdsa_384_done) {
EVP_MD m = *EVP_sha384();
md_ecdsa_384_done = 1;
m.required_pkey_type[0] = (*evp_key)->type;
m.verify = (void*)ECDSA_verify;
md = m;
}
*digest_type = &md;
}
#else
*digest_type = EVP_sha384();
#endif
break;
#endif /* USE_ECDSA */
default:
verbose(VERB_QUERY, "verify: unknown algorithm %d",
algo);
return 0;
}
return 1;
}
