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keys.c
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keys.c
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/*
* keys.c handle private keys for use in DNSSEC
*
* This module should hide some of the openSSL complexities
* and give a general interface for private keys and hmac
* handling
*
* (c) NLnet Labs, 2004-2006
*
* See the file LICENSE for the license
*/
#include <ldns/config.h>
#include <ldns/ldns.h>
#ifdef HAVE_SSL
#include <openssl/ssl.h>
#include <openssl/rand.h>
#include <openssl/bn.h>
#include <openssl/rsa.h>
#ifdef USE_DSA
#include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#endif /* HAVE_SSL */
ldns_lookup_table ldns_signing_algorithms[] = {
{ LDNS_SIGN_RSAMD5, "RSAMD5" },
{ LDNS_SIGN_RSASHA1, "RSASHA1" },
{ LDNS_SIGN_RSASHA1_NSEC3, "RSASHA1-NSEC3-SHA1" },
#ifdef USE_SHA2
{ LDNS_SIGN_RSASHA256, "RSASHA256" },
{ LDNS_SIGN_RSASHA512, "RSASHA512" },
#endif
#ifdef USE_GOST
{ LDNS_SIGN_ECC_GOST, "ECC-GOST" },
#endif
#ifdef USE_ECDSA
{ LDNS_SIGN_ECDSAP256SHA256, "ECDSAP256SHA256" },
{ LDNS_SIGN_ECDSAP384SHA384, "ECDSAP384SHA384" },
#endif
#ifdef USE_ED25519
{ LDNS_SIGN_ED25519, "ED25519" },
#endif
#ifdef USE_ED448
{ LDNS_SIGN_ED448, "ED448" },
#endif
#ifdef USE_DSA
{ LDNS_SIGN_DSA, "DSA" },
{ LDNS_SIGN_DSA_NSEC3, "DSA-NSEC3-SHA1" },
#endif
{ LDNS_SIGN_HMACMD5, "hmac-md5.sig-alg.reg.int" },
{ LDNS_SIGN_HMACSHA1, "hmac-sha1" },
{ LDNS_SIGN_HMACSHA256, "hmac-sha256" },
{ LDNS_SIGN_HMACSHA224, "hmac-sha224" },
{ LDNS_SIGN_HMACSHA384, "hmac-sha384" },
{ LDNS_SIGN_HMACSHA512, "hmac-sha512" },
{ 0, NULL }
};
ldns_key_list *
ldns_key_list_new(void)
{
ldns_key_list *key_list = LDNS_MALLOC(ldns_key_list);
if (!key_list) {
return NULL;
} else {
key_list->_key_count = 0;
key_list->_keys = NULL;
return key_list;
}
}
ldns_key *
ldns_key_new(void)
{
ldns_key *newkey;
newkey = LDNS_MALLOC(ldns_key);
if (!newkey) {
return NULL;
} else {
/* some defaults - not sure wether to do this */
ldns_key_set_use(newkey, true);
ldns_key_set_flags(newkey, LDNS_KEY_ZONE_KEY);
ldns_key_set_origttl(newkey, 0);
ldns_key_set_keytag(newkey, 0);
ldns_key_set_inception(newkey, 0);
ldns_key_set_expiration(newkey, 0);
ldns_key_set_pubkey_owner(newkey, NULL);
#ifdef HAVE_SSL
ldns_key_set_evp_key(newkey, NULL);
#endif /* HAVE_SSL */
ldns_key_set_hmac_key(newkey, NULL);
ldns_key_set_external_key(newkey, NULL);
return newkey;
}
}
ldns_status
ldns_key_new_frm_fp(ldns_key **k, FILE *fp)
{
return ldns_key_new_frm_fp_l(k, fp, NULL);
}
#if defined(HAVE_SSL) && !defined(OPENSSL_NO_ENGINE)
ldns_status
ldns_key_new_frm_engine(ldns_key **key, ENGINE *e, char *key_id, ldns_algorithm alg)
{
ldns_key *k;
k = ldns_key_new();
if(!k) return LDNS_STATUS_MEM_ERR;
#ifndef S_SPLINT_S
k->_key.key = ENGINE_load_private_key(e, key_id, UI_OpenSSL(), NULL);
if(!k->_key.key) {
ldns_key_free(k);
return LDNS_STATUS_ERR;
}
ldns_key_set_algorithm(k, (ldns_signing_algorithm) alg);
if (!k->_key.key) {
ldns_key_free(k);
return LDNS_STATUS_ENGINE_KEY_NOT_LOADED;
}
#endif /* splint */
*key = k;
return LDNS_STATUS_OK;
}
#endif
#ifdef USE_GOST
/** store GOST engine reference loaded into OpenSSL library */
ENGINE* ldns_gost_engine = NULL;
int
ldns_key_EVP_load_gost_id(void)
{
static int gost_id = 0;
const EVP_PKEY_ASN1_METHOD* meth;
ENGINE* e;
if(gost_id) return gost_id;
/* see if configuration loaded gost implementation from other engine*/
meth = EVP_PKEY_asn1_find_str(NULL, "gost2001", -1);
if(meth) {
EVP_PKEY_asn1_get0_info(&gost_id, NULL, NULL, NULL, NULL, meth);
return gost_id;
}
/* see if engine can be loaded already */
e = ENGINE_by_id("gost");
if(!e) {
/* load it ourself, in case statically linked */
ENGINE_load_builtin_engines();
ENGINE_load_dynamic();
e = ENGINE_by_id("gost");
}
if(!e) {
/* no gost engine in openssl */
return 0;
}
if(!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
ENGINE_finish(e);
ENGINE_free(e);
return 0;
}
meth = EVP_PKEY_asn1_find_str(&e, "gost2001", -1);
if(!meth) {
/* algo not found */
ENGINE_finish(e);
ENGINE_free(e);
return 0;
}
/* Note: do not ENGINE_finish and ENGINE_free the acquired engine
* on some platforms this frees up the meth and unloads gost stuff */
ldns_gost_engine = e;
EVP_PKEY_asn1_get0_info(&gost_id, NULL, NULL, NULL, NULL, meth);
return gost_id;
}
void ldns_key_EVP_unload_gost(void)
{
if(ldns_gost_engine) {
ENGINE_finish(ldns_gost_engine);
ENGINE_free(ldns_gost_engine);
ldns_gost_engine = NULL;
}
}
/** read GOST private key */
static EVP_PKEY*
ldns_key_new_frm_fp_gost_l(FILE* fp, int* line_nr)
{
char token[16384];
const unsigned char* pp;
int gost_id;
EVP_PKEY* pkey;
ldns_rdf* b64rdf = NULL;
gost_id = ldns_key_EVP_load_gost_id();
if(!gost_id)
return NULL;
if (ldns_fget_keyword_data_l(fp, "GostAsn1", ": ", token, "\n",
sizeof(token), line_nr) == -1)
return NULL;
while(strlen(token) < 96) {
/* read more b64 from the file, b64 split on multiple lines */
if(ldns_fget_token_l(fp, token+strlen(token), "\n",
sizeof(token)-strlen(token), line_nr) == -1)
return NULL;
}
if(ldns_str2rdf_b64(&b64rdf, token) != LDNS_STATUS_OK)
return NULL;
pp = (unsigned char*)ldns_rdf_data(b64rdf);
pkey = d2i_PrivateKey(gost_id, NULL, &pp, (int)ldns_rdf_size(b64rdf));
ldns_rdf_deep_free(b64rdf);
return pkey;
}
#endif
#ifdef USE_ECDSA
/** calculate public key from private key */
static int
ldns_EC_KEY_calc_public(EC_KEY* ec)
{
EC_POINT* pub_key;
const EC_GROUP* group;
group = EC_KEY_get0_group(ec);
pub_key = EC_POINT_new(group);
if(!pub_key) return 0;
if(!EC_POINT_copy(pub_key, EC_GROUP_get0_generator(group))) {
EC_POINT_free(pub_key);
return 0;
}
if(!EC_POINT_mul(group, pub_key, EC_KEY_get0_private_key(ec),
NULL, NULL, NULL)) {
EC_POINT_free(pub_key);
return 0;
}
if(EC_KEY_set_public_key(ec, pub_key) == 0) {
EC_POINT_free(pub_key);
return 0;
}
EC_POINT_free(pub_key);
return 1;
}
/** read ECDSA private key */
static EVP_PKEY*
ldns_key_new_frm_fp_ecdsa_l(FILE* fp, ldns_algorithm alg, int* line_nr)
{
char token[16384];
ldns_rdf* b64rdf = NULL;
unsigned char* pp;
BIGNUM* bn;
EVP_PKEY* evp_key;
EC_KEY* ec;
if (ldns_fget_keyword_data_l(fp, "PrivateKey", ": ", token, "\n",
sizeof(token), line_nr) == -1)
return NULL;
if(ldns_str2rdf_b64(&b64rdf, token) != LDNS_STATUS_OK)
return NULL;
pp = (unsigned char*)ldns_rdf_data(b64rdf);
if(alg == LDNS_ECDSAP256SHA256)
ec = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
else if(alg == LDNS_ECDSAP384SHA384)
ec = EC_KEY_new_by_curve_name(NID_secp384r1);
else ec = NULL;
if(!ec) {
ldns_rdf_deep_free(b64rdf);
return NULL;
}
bn = BN_bin2bn(pp, (int)ldns_rdf_size(b64rdf), NULL);
ldns_rdf_deep_free(b64rdf);
if(!bn) {
EC_KEY_free(ec);
return NULL;
}
EC_KEY_set_private_key(ec, bn);
BN_free(bn);
if(!ldns_EC_KEY_calc_public(ec)) {
EC_KEY_free(ec);
return NULL;
}
evp_key = EVP_PKEY_new();
if(!evp_key) {
EC_KEY_free(ec);
return NULL;
}
if (!EVP_PKEY_assign_EC_KEY(evp_key, ec)) {
EVP_PKEY_free(evp_key);
EC_KEY_free(ec);
return NULL;
}
return evp_key;
}
#endif
#ifdef USE_ED25519
/** turn private key buffer into EC_KEY structure */
static EVP_PKEY*
ldns_ed25519_priv_raw(uint8_t* pkey, int plen)
{
const unsigned char* pp;
uint8_t buf[256];
int buflen = 0;
uint8_t pre[] = {0x30, 0x2e, 0x02, 0x01, 0x00, 0x30, 0x05, 0x06,
0x03, 0x2b, 0x65, 0x70, 0x04, 0x22, 0x04, 0x20};
int pre_len = 16;
/* ASN looks like this for ED25519 public key
* 302a300506032b6570032100 <32byteskey>
* for ED25519 private key
* 302e020100300506032b657004220420 <32bytes>
*
* for X25519 this was
* 30320201010420 <32byteskey>
* andparameters a00b06092b06010401da470f01
* (noparameters, preamble is 30250201010420).
* the key is reversed (little endian).
*/
buflen = pre_len + plen;
if((size_t)buflen > sizeof(buf))
return NULL;
memmove(buf, pre, pre_len);
memmove(buf+pre_len, pkey, plen);
/* reverse the pkey into the buf - key is not reversed it seems */
/* for(i=0; i<plen; i++)
buf[pre_len+i] = pkey[plen-1-i]; */
pp = buf;
return d2i_PrivateKey(NID_ED25519, NULL, &pp, buflen);
}
/** read ED25519 private key */
static EVP_PKEY*
ldns_key_new_frm_fp_ed25519_l(FILE* fp, int* line_nr)
{
char token[16384];
ldns_rdf* b64rdf = NULL;
EVP_PKEY* evp_key;
if (ldns_fget_keyword_data_l(fp, "PrivateKey", ": ", token, "\n",
sizeof(token), line_nr) == -1)
return NULL;
if(ldns_str2rdf_b64(&b64rdf, token) != LDNS_STATUS_OK)
return NULL;
/* we use d2i_ECPrivateKey because it calculates the public key
* from the private part, which others, EC_KEY_set_private_key,
* and o2i methods, do not do */
/* for that the private key has to be encoded in ASN1 notation
* with a ED25519 prefix on it */
evp_key = ldns_ed25519_priv_raw(ldns_rdf_data(b64rdf),
(int)ldns_rdf_size(b64rdf));
ldns_rdf_deep_free(b64rdf);
return evp_key;
}
#endif
#ifdef USE_ED448
/** turn private key buffer into EC_KEY structure */
static EVP_PKEY*
ldns_ed448_priv_raw(uint8_t* pkey, int plen)
{
const unsigned char* pp;
uint8_t buf[256];
int buflen = 0;
uint8_t pre[] = {0x30, 0x47, 0x02, 0x01, 0x00, 0x30, 0x05, 0x06, 0x03, 0x2b, 0x65, 0x71, 0x04, 0x3b, 0x04, 0x39};
int pre_len = 16;
/* ASN looks like this for ED448
* 3047020100300506032b6571043b0439 <57bytekey>
* the key is reversed (little endian).
*/
buflen = pre_len + plen;
if((size_t)buflen > sizeof(buf))
return NULL;
memmove(buf, pre, pre_len);
memmove(buf+pre_len, pkey, plen);
/* reverse the pkey into the buf - key is not reversed it seems */
/* for(i=0; i<plen; i++)
buf[pre_len+i] = pkey[plen-1-i]; */
pp = buf;
return d2i_PrivateKey(NID_ED448, NULL, &pp, buflen);
}
/** read ED448 private key */
static EVP_PKEY*
ldns_key_new_frm_fp_ed448_l(FILE* fp, int* line_nr)
{
char token[16384];
ldns_rdf* b64rdf = NULL;
EVP_PKEY* evp_key;
if (ldns_fget_keyword_data_l(fp, "PrivateKey", ": ", token, "\n",
sizeof(token), line_nr) == -1)
return NULL;
if(ldns_str2rdf_b64(&b64rdf, token) != LDNS_STATUS_OK)
return NULL;
/* convert private key into ASN notation and then convert that */
evp_key = ldns_ed448_priv_raw(ldns_rdf_data(b64rdf),
(int)ldns_rdf_size(b64rdf));
ldns_rdf_deep_free(b64rdf);
return evp_key;
}
#endif
ldns_status
ldns_key_new_frm_fp_l(ldns_key **key, FILE *fp, int *line_nr)
{
ldns_key *k;
char *d;
ldns_signing_algorithm alg;
ldns_rr *key_rr;
#ifdef HAVE_SSL
RSA *rsa;
#ifdef USE_DSA
DSA *dsa;
#endif
unsigned char *hmac;
size_t hmac_size;
#endif /* HAVE_SSL */
k = ldns_key_new();
d = LDNS_XMALLOC(char, LDNS_MAX_LINELEN);
if (!k || !d) {
ldns_key_free(k);
LDNS_FREE(d);
return LDNS_STATUS_MEM_ERR;
}
alg = 0;
/* the file is highly structured. Do this in sequence */
/* RSA:
* Private-key-format: v1.x.
* Algorithm: 1 (RSA)
*/
/* get the key format version number */
if (ldns_fget_keyword_data_l(fp, "Private-key-format", ": ", d, "\n",
LDNS_MAX_LINELEN, line_nr) == -1) {
/* no version information */
ldns_key_free(k);
LDNS_FREE(d);
return LDNS_STATUS_SYNTAX_ERR;
}
if (strncmp(d, "v1.", 3) != 0) {
ldns_key_free(k);
LDNS_FREE(d);
return LDNS_STATUS_SYNTAX_VERSION_ERR;
}
/* get the algorithm type, our file function strip ( ) so there are
* not in the return string! */
if (ldns_fget_keyword_data_l(fp, "Algorithm", ": ", d, "\n",
LDNS_MAX_LINELEN, line_nr) == -1) {
/* no alg information */
ldns_key_free(k);
LDNS_FREE(d);
return LDNS_STATUS_SYNTAX_ALG_ERR;
}
if (strncmp(d, "1 RSA", 2) == 0) {
alg = LDNS_SIGN_RSAMD5;
}
if (strncmp(d, "2 DH", 2) == 0) {
alg = (ldns_signing_algorithm)LDNS_DH;
}
if (strncmp(d, "3 DSA", 2) == 0) {
#ifdef USE_DSA
alg = LDNS_SIGN_DSA;
#else
# ifdef STDERR_MSGS
fprintf(stderr, "Warning: DSA not compiled into this ");
fprintf(stderr, "version of ldns\n");
# endif
#endif
}
if (strncmp(d, "4 ECC", 2) == 0) {
alg = (ldns_signing_algorithm)LDNS_ECC;
}
if (strncmp(d, "5 RSASHA1", 2) == 0) {
alg = LDNS_SIGN_RSASHA1;
}
if (strncmp(d, "6 DSA", 2) == 0) {
#ifdef USE_DSA
alg = LDNS_SIGN_DSA_NSEC3;
#else
# ifdef STDERR_MSGS
fprintf(stderr, "Warning: DSA not compiled into this ");
fprintf(stderr, "version of ldns\n");
# endif
#endif
}
if (strncmp(d, "7 RSASHA1", 2) == 0) {
alg = LDNS_SIGN_RSASHA1_NSEC3;
}
if (strncmp(d, "8 RSASHA256", 2) == 0) {
#ifdef USE_SHA2
alg = LDNS_SIGN_RSASHA256;
#else
# ifdef STDERR_MSGS
fprintf(stderr, "Warning: SHA256 not compiled into this ");
fprintf(stderr, "version of ldns\n");
# endif
#endif
}
if (strncmp(d, "10 RSASHA512", 3) == 0) {
#ifdef USE_SHA2
alg = LDNS_SIGN_RSASHA512;
#else
# ifdef STDERR_MSGS
fprintf(stderr, "Warning: SHA512 not compiled into this ");
fprintf(stderr, "version of ldns\n");
# endif
#endif
}
if (strncmp(d, "12 ECC-GOST", 3) == 0) {
#ifdef USE_GOST
alg = LDNS_SIGN_ECC_GOST;
#else
# ifdef STDERR_MSGS
fprintf(stderr, "Warning: ECC-GOST not compiled into this ");
fprintf(stderr, "version of ldns, use --enable-gost\n");
# endif
#endif
}
if (strncmp(d, "13 ECDSAP256SHA256", 3) == 0) {
#ifdef USE_ECDSA
alg = LDNS_SIGN_ECDSAP256SHA256;
#else
# ifdef STDERR_MSGS
fprintf(stderr, "Warning: ECDSA not compiled into this ");
fprintf(stderr, "version of ldns, use --enable-ecdsa\n");
# endif
#endif
}
if (strncmp(d, "14 ECDSAP384SHA384", 3) == 0) {
#ifdef USE_ECDSA
alg = LDNS_SIGN_ECDSAP384SHA384;
#else
# ifdef STDERR_MSGS
fprintf(stderr, "Warning: ECDSA not compiled into this ");
fprintf(stderr, "version of ldns, use --enable-ecdsa\n");
# endif
#endif
}
if (strncmp(d, "15 ED25519", 3) == 0) {
#ifdef USE_ED25519
alg = LDNS_SIGN_ED25519;
#else
# ifdef STDERR_MSGS
fprintf(stderr, "Warning: ED25519 not compiled into this ");
fprintf(stderr, "version of ldns, use --enable-ed25519\n");
# endif
#endif
}
if (strncmp(d, "16 ED448", 3) == 0) {
#ifdef USE_ED448
alg = LDNS_SIGN_ED448;
#else
# ifdef STDERR_MSGS
fprintf(stderr, "Warning: ED448 not compiled into this ");
fprintf(stderr, "version of ldns, use --enable-ed448\n");
# endif
#endif
}
if (strncmp(d, "157 HMAC-MD5", 4) == 0) {
alg = LDNS_SIGN_HMACMD5;
}
if (strncmp(d, "158 HMAC-SHA1", 4) == 0) {
alg = LDNS_SIGN_HMACSHA1;
}
if (strncmp(d, "159 HMAC-SHA256", 4) == 0) {
alg = LDNS_SIGN_HMACSHA256;
}
/* For compatibility with dnssec-keygen */
if (strncmp(d, "161 ", 4) == 0) {
alg = LDNS_SIGN_HMACSHA1;
}
if (strncmp(d, "162 HMAC-SHA224", 4) == 0) {
alg = LDNS_SIGN_HMACSHA224;
}
/* For compatibility with dnssec-keygen */
if (strncmp(d, "163 ", 4) == 0) {
alg = LDNS_SIGN_HMACSHA256;
}
if (strncmp(d, "164 HMAC-SHA384", 4) == 0) {
alg = LDNS_SIGN_HMACSHA384;
}
if (strncmp(d, "165 HMAC-SHA512", 4) == 0) {
alg = LDNS_SIGN_HMACSHA512;
}
LDNS_FREE(d);
switch(alg) {
case LDNS_SIGN_RSAMD5:
case LDNS_SIGN_RSASHA1:
case LDNS_SIGN_RSASHA1_NSEC3:
#ifdef USE_SHA2
case LDNS_SIGN_RSASHA256:
case LDNS_SIGN_RSASHA512:
#endif
ldns_key_set_algorithm(k, alg);
#ifdef HAVE_SSL
rsa = ldns_key_new_frm_fp_rsa_l(fp, line_nr);
if (!rsa) {
ldns_key_free(k);
return LDNS_STATUS_ERR;
}
ldns_key_assign_rsa_key(k, rsa);
#endif /* HAVE_SSL */
break;
#ifdef USE_DSA
case LDNS_SIGN_DSA:
case LDNS_SIGN_DSA_NSEC3:
ldns_key_set_algorithm(k, alg);
#ifdef HAVE_SSL
dsa = ldns_key_new_frm_fp_dsa_l(fp, line_nr);
if (!dsa) {
ldns_key_free(k);
return LDNS_STATUS_ERR;
}
ldns_key_assign_dsa_key(k, dsa);
#endif /* HAVE_SSL */
break;
#endif /* USE_DSA */
case LDNS_SIGN_HMACMD5:
case LDNS_SIGN_HMACSHA1:
case LDNS_SIGN_HMACSHA224:
case LDNS_SIGN_HMACSHA256:
case LDNS_SIGN_HMACSHA384:
case LDNS_SIGN_HMACSHA512:
ldns_key_set_algorithm(k, alg);
#ifdef HAVE_SSL
hmac = ldns_key_new_frm_fp_hmac_l(fp, line_nr, &hmac_size);
if (!hmac) {
ldns_key_free(k);
return LDNS_STATUS_ERR;
}
ldns_key_set_hmac_size(k, hmac_size);
ldns_key_set_hmac_key(k, hmac);
#endif /* HAVE_SSL */
break;
case LDNS_SIGN_ECC_GOST:
ldns_key_set_algorithm(k, alg);
#if defined(HAVE_SSL) && defined(USE_GOST)
if(!ldns_key_EVP_load_gost_id()) {
ldns_key_free(k);
return LDNS_STATUS_CRYPTO_ALGO_NOT_IMPL;
}
ldns_key_set_evp_key(k,
ldns_key_new_frm_fp_gost_l(fp, line_nr));
#ifndef S_SPLINT_S
if(!k->_key.key) {
ldns_key_free(k);
return LDNS_STATUS_ERR;
}
#endif /* splint */
#endif
break;
#ifdef USE_ECDSA
case LDNS_SIGN_ECDSAP256SHA256:
case LDNS_SIGN_ECDSAP384SHA384:
ldns_key_set_algorithm(k, alg);
ldns_key_set_evp_key(k,
ldns_key_new_frm_fp_ecdsa_l(fp, (ldns_algorithm)alg, line_nr));
#ifndef S_SPLINT_S
if(!k->_key.key) {
ldns_key_free(k);
return LDNS_STATUS_ERR;
}
#endif /* splint */
break;
#endif
#ifdef USE_ED25519
case LDNS_SIGN_ED25519:
ldns_key_set_algorithm(k, alg);
ldns_key_set_evp_key(k,
ldns_key_new_frm_fp_ed25519_l(fp, line_nr));
#ifndef S_SPLINT_S
if(!k->_key.key) {
ldns_key_free(k);
return LDNS_STATUS_ERR;
}
#endif /* splint */
break;
#endif
#ifdef USE_ED448
case LDNS_SIGN_ED448:
ldns_key_set_algorithm(k, alg);
ldns_key_set_evp_key(k,
ldns_key_new_frm_fp_ed448_l(fp, line_nr));
#ifndef S_SPLINT_S
if(!k->_key.key) {
ldns_key_free(k);
return LDNS_STATUS_ERR;
}
#endif /* splint */
break;
#endif
default:
ldns_key_free(k);
return LDNS_STATUS_SYNTAX_ALG_ERR;
}
key_rr = ldns_key2rr(k);
ldns_key_set_keytag(k, ldns_calc_keytag(key_rr));
ldns_rr_free(key_rr);
if (key) {
*key = k;
return LDNS_STATUS_OK;
}
ldns_key_free(k);
return LDNS_STATUS_ERR;
}
#ifdef HAVE_SSL
RSA *
ldns_key_new_frm_fp_rsa(FILE *f)
{
return ldns_key_new_frm_fp_rsa_l(f, NULL);
}
RSA *
ldns_key_new_frm_fp_rsa_l(FILE *f, int *line_nr)
{
/* we parse
* Modulus:
* PublicExponent:
* PrivateExponent:
* Prime1:
* Prime2:
* Exponent1:
* Exponent2:
* Coefficient:
*
* man 3 RSA:
*
* struct
* {
* BIGNUM *n; // public modulus
* BIGNUM *e; // public exponent
* BIGNUM *d; // private exponent
* BIGNUM *p; // secret prime factor
* BIGNUM *q; // secret prime factor
* BIGNUM *dmp1; // d mod (p-1)
* BIGNUM *dmq1; // d mod (q-1)
* BIGNUM *iqmp; // q^-1 mod p
* // ...
*
*/
char *b;
RSA *rsa;
uint8_t *buf;
int i;
BIGNUM *n=NULL, *e=NULL, *d=NULL, *p=NULL, *q=NULL,
*dmp1=NULL, *dmq1=NULL, *iqmp=NULL;
b = LDNS_XMALLOC(char, LDNS_MAX_LINELEN);
buf = LDNS_XMALLOC(uint8_t, LDNS_MAX_LINELEN);
rsa = RSA_new();
if (!b || !rsa || !buf) {
goto error;
}
/* I could use functions again, but that seems an overkill,
* allthough this also looks tedious
*/
/* Modules, rsa->n */
if (ldns_fget_keyword_data_l(f, "Modulus", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
#ifndef S_SPLINT_S
n = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!n) {
goto error;
}
/* PublicExponent, rsa->e */
if (ldns_fget_keyword_data_l(f, "PublicExponent", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
e = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!e) {
goto error;
}
/* PrivateExponent, rsa->d */
if (ldns_fget_keyword_data_l(f, "PrivateExponent", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
d = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!d) {
goto error;
}
/* Prime1, rsa->p */
if (ldns_fget_keyword_data_l(f, "Prime1", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
p = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!p) {
goto error;
}
/* Prime2, rsa->q */
if (ldns_fget_keyword_data_l(f, "Prime2", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
q = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!q) {
goto error;
}
/* Exponent1, rsa->dmp1 */
if (ldns_fget_keyword_data_l(f, "Exponent1", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
dmp1 = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!dmp1) {
goto error;
}
/* Exponent2, rsa->dmq1 */
if (ldns_fget_keyword_data_l(f, "Exponent2", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
dmq1 = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!dmq1) {
goto error;
}
/* Coefficient, rsa->iqmp */
if (ldns_fget_keyword_data_l(f, "Coefficient", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
iqmp = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!iqmp) {
goto error;
}
#endif /* splint */
#if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL)
# ifndef S_SPLINT_S
rsa->n = n;
rsa->e = e;
rsa->d = d;
rsa->p = p;
rsa->q = q;
rsa->dmp1 = dmp1;
rsa->dmq1 = dmq1;
rsa->iqmp = iqmp;
# endif
#else
if(!RSA_set0_key(rsa, n, e, d))
goto error;
n = NULL;
e = NULL;
d = NULL;
if(!RSA_set0_factors(rsa, p, q))
goto error;
p = NULL;
q = NULL;
if(!RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp))
goto error;
#endif
LDNS_FREE(buf);
LDNS_FREE(b);
return rsa;
error:
RSA_free(rsa);
LDNS_FREE(b);
LDNS_FREE(buf);
BN_free(n);
BN_free(e);
BN_free(d);
BN_free(p);
BN_free(q);
BN_free(dmp1);
BN_free(dmq1);
BN_free(iqmp);
return NULL;
}
DSA *
ldns_key_new_frm_fp_dsa(FILE *f)
{
return ldns_key_new_frm_fp_dsa_l(f, NULL);
}
DSA *
ldns_key_new_frm_fp_dsa_l(FILE *f, ATTR_UNUSED(int *line_nr))
{
int i;
char *d;
DSA *dsa;
uint8_t *buf;
BIGNUM *p=NULL, *q=NULL, *g=NULL, *priv_key=NULL, *pub_key=NULL;
d = LDNS_XMALLOC(char, LDNS_MAX_LINELEN);
buf = LDNS_XMALLOC(uint8_t, LDNS_MAX_LINELEN);
dsa = DSA_new();
if (!d || !dsa || !buf) {
goto error;
}
/* the line parser removes the () from the input... */
/* Prime, dsa->p */
if (ldns_fget_keyword_data_l(f, "Primep", ": ", d, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)d, buf, ldns_b64_ntop_calculate_size(strlen(d)));
#ifndef S_SPLINT_S
p = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!p) {
goto error;
}
/* Subprime, dsa->q */
if (ldns_fget_keyword_data_l(f, "Subprimeq", ": ", d, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)d, buf, ldns_b64_ntop_calculate_size(strlen(d)));
q = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!q) {
goto error;
}
/* Base, dsa->g */
if (ldns_fget_keyword_data_l(f, "Baseg", ": ", d, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)d, buf, ldns_b64_ntop_calculate_size(strlen(d)));
g = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!g) {
goto error;
}
/* Private key, dsa->priv_key */
if (ldns_fget_keyword_data_l(f, "Private_valuex", ": ", d, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)d, buf, ldns_b64_ntop_calculate_size(strlen(d)));
priv_key = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!priv_key) {
goto error;
}
/* Public key, dsa->priv_key */
if (ldns_fget_keyword_data_l(f, "Public_valuey", ": ", d, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
goto error;
}
i = ldns_b64_pton((const char*)d, buf, ldns_b64_ntop_calculate_size(strlen(d)));
pub_key = BN_bin2bn((const char unsigned*)buf, i, NULL);
if (!pub_key) {
goto error;
}
#endif /* splint */
#if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL)
# ifndef S_SPLINT_S
dsa->p = p;
dsa->q = q;
dsa->g = g;
dsa->priv_key = priv_key;
dsa->pub_key = pub_key;
# endif
#else
if(!DSA_set0_pqg(dsa, p, q, g))
goto error;
p = NULL;
q = NULL;
g = NULL;
if(!DSA_set0_key(dsa, pub_key, priv_key))
goto error;
#endif