Split OpenSSL specific bits of keyraw.hc into keyraw-internal.hc.

All usage is internal to val_secalgo.c, which is already in openssl.
This commit is contained in:
Jim Hague 2018-11-20 16:51:17 +00:00
parent da94b52f74
commit f3e0f2b9e6
5 changed files with 471 additions and 421 deletions

View File

@ -94,7 +94,7 @@ COMPAT_OBJ=$(LIBOBJS:.o=.lo)
UTIL_OBJ=rbtree.lo lruhash.lo lookup3.lo locks.lo UTIL_OBJ=rbtree.lo lruhash.lo lookup3.lo locks.lo
JSMN_OBJ=jsmn.lo JSMN_OBJ=jsmn.lo
TLS_OBJ=tls.lo pubkey-pinning.lo val_secalgo.lo TLS_OBJ=tls.lo pubkey-pinning.lo keyraw-internal.lo val_secalgo.lo
YXML_OBJ=yxml.lo YXML_OBJ=yxml.lo
YAML_OBJ=convert_yaml_to_json.lo YAML_OBJ=convert_yaml_to_json.lo
@ -308,8 +308,8 @@ anchor.lo anchor.o: $(srcdir)/anchor.c config.h \
$(srcdir)/extension/default_eventloop.h $(srcdir)/extension/poll_eventloop.h \ $(srcdir)/extension/default_eventloop.h $(srcdir)/extension/poll_eventloop.h \
$(srcdir)/types-internal.h $(srcdir)/ub_loop.h $(srcdir)/server.h $(srcdir)/tls.h $(srcdir)/openssl/tls-internal.h \ $(srcdir)/types-internal.h $(srcdir)/ub_loop.h $(srcdir)/server.h $(srcdir)/tls.h $(srcdir)/openssl/tls-internal.h \
$(srcdir)/dnssec.h $(srcdir)/gldns/rrdef.h $(srcdir)/yxml/yxml.h $(srcdir)/gldns/parseutil.h $(srcdir)/gldns/str2wire.h \ $(srcdir)/dnssec.h $(srcdir)/gldns/rrdef.h $(srcdir)/yxml/yxml.h $(srcdir)/gldns/parseutil.h $(srcdir)/gldns/str2wire.h \
$(srcdir)/gldns/rrdef.h $(srcdir)/gldns/wire2str.h $(srcdir)/gldns/keyraw.h $(srcdir)/general.h $(srcdir)/util-internal.h \ $(srcdir)/gldns/rrdef.h $(srcdir)/gldns/wire2str.h $(srcdir)/gldns/keyraw.h $(srcdir)/openssl/keyraw-internal.h \
$(srcdir)/platform.h $(srcdir)/general.h $(srcdir)/util-internal.h $(srcdir)/platform.h
const-info.lo const-info.o: $(srcdir)/const-info.c \ const-info.lo const-info.o: $(srcdir)/const-info.c \
getdns/getdns.h \ getdns/getdns.h \
getdns/getdns_extra.h \ getdns/getdns_extra.h \
@ -352,8 +352,8 @@ dnssec.lo dnssec.o: $(srcdir)/dnssec.c config.h \
$(srcdir)/types-internal.h $(srcdir)/ub_loop.h $(srcdir)/server.h $(srcdir)/rr-iter.h $(srcdir)/rr-dict.h $(srcdir)/gldns/gbuffer.h \ $(srcdir)/types-internal.h $(srcdir)/ub_loop.h $(srcdir)/server.h $(srcdir)/rr-iter.h $(srcdir)/rr-dict.h $(srcdir)/gldns/gbuffer.h \
$(srcdir)/gldns/pkthdr.h $(srcdir)/anchor.h $(srcdir)/tls.h $(srcdir)/openssl/tls-internal.h $(srcdir)/util-internal.h \ $(srcdir)/gldns/pkthdr.h $(srcdir)/anchor.h $(srcdir)/tls.h $(srcdir)/openssl/tls-internal.h $(srcdir)/util-internal.h \
$(srcdir)/dnssec.h $(srcdir)/gldns/rrdef.h $(srcdir)/gldns/str2wire.h $(srcdir)/gldns/rrdef.h $(srcdir)/gldns/wire2str.h \ $(srcdir)/dnssec.h $(srcdir)/gldns/rrdef.h $(srcdir)/gldns/str2wire.h $(srcdir)/gldns/rrdef.h $(srcdir)/gldns/wire2str.h \
$(srcdir)/gldns/keyraw.h $(srcdir)/gldns/parseutil.h $(srcdir)/general.h $(srcdir)/dict.h $(srcdir)/list.h \ $(srcdir)/gldns/keyraw.h $(srcdir)/openssl/keyraw-internal.h $(srcdir)/gldns/parseutil.h $(srcdir)/general.h \
$(srcdir)/util/val_secalgo.h $(srcdir)/util/orig-headers/val_secalgo.h $(srcdir)/dict.h $(srcdir)/list.h $(srcdir)/util/val_secalgo.h $(srcdir)/util/orig-headers/val_secalgo.h
general.lo general.o: $(srcdir)/general.c config.h \ general.lo general.o: $(srcdir)/general.c config.h \
$(srcdir)/general.h getdns/getdns.h \ $(srcdir)/general.h getdns/getdns.h \
$(srcdir)/types-internal.h \ $(srcdir)/types-internal.h \
@ -447,7 +447,7 @@ gbuffer.lo gbuffer.o: $(srcdir)/gldns/gbuffer.c \
config.h $(srcdir)/gldns/gbuffer.h config.h $(srcdir)/gldns/gbuffer.h
keyraw.lo keyraw.o: $(srcdir)/gldns/keyraw.c \ keyraw.lo keyraw.o: $(srcdir)/gldns/keyraw.c \
config.h $(srcdir)/gldns/keyraw.h \ config.h $(srcdir)/gldns/keyraw.h \
$(srcdir)/gldns/rrdef.h $(srcdir)/openssl/keyraw-internal.h
parse.lo parse.o: $(srcdir)/gldns/parse.c \ parse.lo parse.o: $(srcdir)/gldns/parse.c \
config.h $(srcdir)/gldns/parse.h \ config.h $(srcdir)/gldns/parse.h \
$(srcdir)/gldns/parseutil.h $(srcdir)/gldns/gbuffer.h $(srcdir)/gldns/parseutil.h $(srcdir)/gldns/gbuffer.h
@ -463,7 +463,7 @@ str2wire.lo str2wire.o: $(srcdir)/gldns/str2wire.c \
wire2str.lo wire2str.o: $(srcdir)/gldns/wire2str.c \ wire2str.lo wire2str.o: $(srcdir)/gldns/wire2str.c \
config.h $(srcdir)/gldns/wire2str.h \ config.h $(srcdir)/gldns/wire2str.h \
$(srcdir)/gldns/str2wire.h $(srcdir)/gldns/rrdef.h $(srcdir)/gldns/pkthdr.h $(srcdir)/gldns/parseutil.h \ $(srcdir)/gldns/str2wire.h $(srcdir)/gldns/rrdef.h $(srcdir)/gldns/pkthdr.h $(srcdir)/gldns/parseutil.h \
$(srcdir)/gldns/gbuffer.h $(srcdir)/gldns/keyraw.h $(srcdir)/gldns/gbuffer.h $(srcdir)/gldns/keyraw.h $(srcdir)/openssl/keyraw-internal.h
arc4_lock.lo arc4_lock.o: $(srcdir)/compat/arc4_lock.c \ arc4_lock.lo arc4_lock.o: $(srcdir)/compat/arc4_lock.c \
config.h config.h
arc4random.lo arc4random.o: $(srcdir)/compat/arc4random.c \ arc4random.lo arc4random.o: $(srcdir)/compat/arc4random.c \
@ -509,6 +509,9 @@ rbtree.lo rbtree.o: $(srcdir)/util/rbtree.c \
$(srcdir)/util/auxiliary/util/fptr_wlist.h $(srcdir)/util/rbtree.h \ $(srcdir)/util/auxiliary/util/fptr_wlist.h $(srcdir)/util/rbtree.h \
$(srcdir)/util/orig-headers/rbtree.h $(srcdir)/util/orig-headers/rbtree.h
jsmn.lo jsmn.o: $(srcdir)/jsmn/jsmn.c $(srcdir)/jsmn/jsmn.h jsmn.lo jsmn.o: $(srcdir)/jsmn/jsmn.c $(srcdir)/jsmn/jsmn.h
keyraw-internal.lo keyraw-internal.o: $(srcdir)/openssl/keyraw-internal.c \
config.h $(srcdir)/gldns/keyraw.h \
$(srcdir)/openssl/keyraw-internal.h $(srcdir)/gldns/rrdef.h
pubkey-pinning.lo pubkey-pinning.o: $(srcdir)/openssl/pubkey-pinning.c \ pubkey-pinning.lo pubkey-pinning.o: $(srcdir)/openssl/pubkey-pinning.c \
config.h $(srcdir)/debug.h \ config.h $(srcdir)/debug.h \
getdns/getdns.h $(srcdir)/context.h \ getdns/getdns.h $(srcdir)/context.h \
@ -533,7 +536,7 @@ val_secalgo.lo val_secalgo.o: $(srcdir)/openssl/val_secalgo.c \
$(srcdir)/util/orig-headers/val_secalgo.h $(srcdir)/util/auxiliary/validator/val_nsec3.h \ $(srcdir)/util/orig-headers/val_secalgo.h $(srcdir)/util/auxiliary/validator/val_nsec3.h \
$(srcdir)/util/auxiliary/util/log.h $(srcdir)/debug.h $(srcdir)/util/auxiliary/sldns/rrdef.h \ $(srcdir)/util/auxiliary/util/log.h $(srcdir)/debug.h $(srcdir)/util/auxiliary/sldns/rrdef.h \
$(srcdir)/gldns/rrdef.h $(srcdir)/util/auxiliary/sldns/keyraw.h $(srcdir)/gldns/keyraw.h \ $(srcdir)/gldns/rrdef.h $(srcdir)/util/auxiliary/sldns/keyraw.h $(srcdir)/gldns/keyraw.h \
$(srcdir)/util/auxiliary/sldns/sbuffer.h $(srcdir)/gldns/gbuffer.h $(srcdir)/openssl/keyraw-internal.h $(srcdir)/util/auxiliary/sldns/sbuffer.h $(srcdir)/gldns/gbuffer.h
yxml.lo yxml.o: $(srcdir)/yxml/yxml.c $(srcdir)/yxml/yxml.h yxml.lo yxml.o: $(srcdir)/yxml/yxml.c $(srcdir)/yxml/yxml.h
libev.lo libev.o: $(srcdir)/extension/libev.c \ libev.lo libev.o: $(srcdir)/extension/libev.c \
config.h $(srcdir)/types-internal.h \ config.h $(srcdir)/types-internal.h \

View File

@ -14,26 +14,6 @@
#include "gldns/keyraw.h" #include "gldns/keyraw.h"
#include "gldns/rrdef.h" #include "gldns/rrdef.h"
#ifdef HAVE_SSL
#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include <openssl/md5.h>
#ifdef HAVE_OPENSSL_ENGINE_H
# include <openssl/engine.h>
#endif
#ifdef HAVE_OPENSSL_BN_H
#include <openssl/bn.h>
#endif
#ifdef HAVE_OPENSSL_RSA_H
#include <openssl/rsa.h>
#endif
#ifdef HAVE_OPENSSL_DSA_H
#include <openssl/dsa.h>
#endif
#endif /* HAVE_SSL */
size_t size_t
gldns_rr_dnskey_key_size_raw(const unsigned char* keydata, gldns_rr_dnskey_key_size_raw(const unsigned char* keydata,
const size_t len, int alg) const size_t len, int alg)
@ -126,315 +106,3 @@ uint16_t gldns_calc_keytag_raw(const uint8_t* key, size_t keysize)
return (uint16_t) (ac32 & 0xFFFF); return (uint16_t) (ac32 & 0xFFFF);
} }
} }
#ifdef HAVE_SSL
#ifdef USE_GOST
/** store GOST engine reference loaded into OpenSSL library */
ENGINE* gldns_gost_engine = NULL;
int
gldns_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 */
gldns_gost_engine = e;
EVP_PKEY_asn1_get0_info(&gost_id, NULL, NULL, NULL, NULL, meth);
return gost_id;
}
void gldns_key_EVP_unload_gost(void)
{
if(gldns_gost_engine) {
ENGINE_finish(gldns_gost_engine);
ENGINE_free(gldns_gost_engine);
gldns_gost_engine = NULL;
}
}
#endif /* USE_GOST */
DSA *
gldns_key_buf2dsa_raw(unsigned char* key, size_t len)
{
uint8_t T;
uint16_t length;
uint16_t offset;
DSA *dsa;
BIGNUM *Q; BIGNUM *P;
BIGNUM *G; BIGNUM *Y;
if(len == 0)
return NULL;
T = (uint8_t)key[0];
length = (64 + T * 8);
offset = 1;
if (T > 8) {
return NULL;
}
if(len < (size_t)1 + SHA_DIGEST_LENGTH + 3*length)
return NULL;
Q = BN_bin2bn(key+offset, SHA_DIGEST_LENGTH, NULL);
offset += SHA_DIGEST_LENGTH;
P = BN_bin2bn(key+offset, (int)length, NULL);
offset += length;
G = BN_bin2bn(key+offset, (int)length, NULL);
offset += length;
Y = BN_bin2bn(key+offset, (int)length, NULL);
/* create the key and set its properties */
if(!Q || !P || !G || !Y || !(dsa = DSA_new())) {
BN_free(Q);
BN_free(P);
BN_free(G);
BN_free(Y);
return NULL;
}
if (!DSA_set0_pqg(dsa, P, Q, G)) {
/* QPG not yet attached, need to free */
BN_free(Q);
BN_free(P);
BN_free(G);
DSA_free(dsa);
BN_free(Y);
return NULL;
}
if (!DSA_set0_key(dsa, Y, NULL)) {
/* QPG attached, cleaned up by DSA_fre() */
DSA_free(dsa);
BN_free(Y);
return NULL;
}
return dsa;
}
RSA *
gldns_key_buf2rsa_raw(unsigned char* key, size_t len)
{
uint16_t offset;
uint16_t exp;
uint16_t int16;
RSA *rsa;
BIGNUM *modulus;
BIGNUM *exponent;
if (len == 0)
return NULL;
if (key[0] == 0) {
if(len < 3)
return NULL;
memmove(&int16, key+1, 2);
exp = ntohs(int16);
offset = 3;
} else {
exp = key[0];
offset = 1;
}
/* key length at least one */
if(len < (size_t)offset + exp + 1)
return NULL;
/* Exponent */
exponent = BN_new();
if(!exponent) return NULL;
(void) BN_bin2bn(key+offset, (int)exp, exponent);
offset += exp;
/* Modulus */
modulus = BN_new();
if(!modulus) {
BN_free(exponent);
return NULL;
}
/* length of the buffer must match the key length! */
(void) BN_bin2bn(key+offset, (int)(len - offset), modulus);
rsa = RSA_new();
if(!rsa) {
BN_free(exponent);
BN_free(modulus);
return NULL;
}
if (!RSA_set0_key(rsa, modulus, exponent, NULL)) {
BN_free(exponent);
BN_free(modulus);
RSA_free(rsa);
return NULL;
}
return rsa;
}
#ifdef USE_GOST
EVP_PKEY*
gldns_gost2pkey_raw(unsigned char* key, size_t keylen)
{
/* prefix header for X509 encoding */
uint8_t asn[37] = { 0x30, 0x63, 0x30, 0x1c, 0x06, 0x06, 0x2a, 0x85,
0x03, 0x02, 0x02, 0x13, 0x30, 0x12, 0x06, 0x07, 0x2a, 0x85,
0x03, 0x02, 0x02, 0x23, 0x01, 0x06, 0x07, 0x2a, 0x85, 0x03,
0x02, 0x02, 0x1e, 0x01, 0x03, 0x43, 0x00, 0x04, 0x40};
unsigned char encoded[37+64];
const unsigned char* pp;
if(keylen != 64) {
/* key wrong size */
return NULL;
}
/* create evp_key */
memmove(encoded, asn, 37);
memmove(encoded+37, key, 64);
pp = (unsigned char*)&encoded[0];
return d2i_PUBKEY(NULL, &pp, (int)sizeof(encoded));
}
#endif /* USE_GOST */
#ifdef USE_ECDSA
EVP_PKEY*
gldns_ecdsa2pkey_raw(unsigned char* key, size_t keylen, uint8_t algo)
{
unsigned char buf[256+2]; /* sufficient for 2*384/8+1 */
const unsigned char* pp = buf;
EVP_PKEY *evp_key;
EC_KEY *ec;
/* check length, which uncompressed must be 2 bignums */
if(algo == GLDNS_ECDSAP256SHA256) {
if(keylen != 2*256/8) return NULL;
ec = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
} else if(algo == GLDNS_ECDSAP384SHA384) {
if(keylen != 2*384/8) return NULL;
ec = EC_KEY_new_by_curve_name(NID_secp384r1);
} else ec = NULL;
if(!ec) return NULL;
if(keylen+1 > sizeof(buf)) { /* sanity check */
EC_KEY_free(ec);
return NULL;
}
/* prepend the 0x02 (from docs) (or actually 0x04 from implementation
* of openssl) for uncompressed data */
buf[0] = POINT_CONVERSION_UNCOMPRESSED;
memmove(buf+1, key, keylen);
if(!o2i_ECPublicKey(&ec, &pp, (int)keylen+1)) {
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 /* USE_ECDSA */
#ifdef USE_ED25519
EVP_PKEY*
gldns_ed255192pkey_raw(const unsigned char* key, size_t keylen)
{
/* ASN1 for ED25519 is 302a300506032b6570032100 <32byteskey> */
uint8_t pre[] = {0x30, 0x2a, 0x30, 0x05, 0x06, 0x03, 0x2b, 0x65,
0x70, 0x03, 0x21, 0x00};
int pre_len = 12;
uint8_t buf[256];
EVP_PKEY *evp_key;
/* pp gets modified by d2i() */
const unsigned char* pp = (unsigned char*)buf;
if(keylen != 32 || keylen + pre_len > sizeof(buf))
return NULL; /* wrong length */
memmove(buf, pre, pre_len);
memmove(buf+pre_len, key, keylen);
evp_key = d2i_PUBKEY(NULL, &pp, (int)(pre_len+keylen));
return evp_key;
}
#endif /* USE_ED25519 */
#ifdef USE_ED448
EVP_PKEY*
gldns_ed4482pkey_raw(const unsigned char* key, size_t keylen)
{
/* ASN1 for ED448 is 3043300506032b6571033a00 <57byteskey> */
uint8_t pre[] = {0x30, 0x43, 0x30, 0x05, 0x06, 0x03, 0x2b, 0x65,
0x71, 0x03, 0x3a, 0x00};
int pre_len = 12;
uint8_t buf[256];
EVP_PKEY *evp_key;
/* pp gets modified by d2i() */
const unsigned char* pp = (unsigned char*)buf;
if(keylen != 57 || keylen + pre_len > sizeof(buf))
return NULL; /* wrong length */
memmove(buf, pre, pre_len);
memmove(buf+pre_len, key, keylen);
evp_key = d2i_PUBKEY(NULL, &pp, (int)(pre_len+keylen));
return evp_key;
}
#endif /* USE_ED448 */
int
gldns_digest_evp(unsigned char* data, unsigned int len, unsigned char* dest,
const EVP_MD* md)
{
EVP_MD_CTX* ctx;
ctx = EVP_MD_CTX_create();
if(!ctx)
return 0;
if(!EVP_DigestInit_ex(ctx, md, NULL) ||
!EVP_DigestUpdate(ctx, data, len) ||
!EVP_DigestFinal_ex(ctx, dest, NULL)) {
EVP_MD_CTX_destroy(ctx);
return 0;
}
EVP_MD_CTX_destroy(ctx);
return 1;
}
#endif /* HAVE_SSL */

View File

@ -20,13 +20,11 @@
#ifndef GLDNS_KEYRAW_H #ifndef GLDNS_KEYRAW_H
#define GLDNS_KEYRAW_H #define GLDNS_KEYRAW_H
#include "keyraw-internal.h"
#ifdef __cplusplus #ifdef __cplusplus
extern "C" { extern "C" {
#endif #endif
#if GLDNS_BUILD_CONFIG_HAVE_SSL
# include <openssl/ssl.h>
# include <openssl/evp.h>
#endif /* GLDNS_BUILD_CONFIG_HAVE_SSL */
/** /**
* get the length of the keydata in bits * get the length of the keydata in bits
@ -46,83 +44,6 @@ size_t gldns_rr_dnskey_key_size_raw(const unsigned char *keydata,
*/ */
uint16_t gldns_calc_keytag_raw(const uint8_t* key, size_t keysize); uint16_t gldns_calc_keytag_raw(const uint8_t* key, size_t keysize);
#if GLDNS_BUILD_CONFIG_HAVE_SSL
/**
* Get the PKEY id for GOST, loads GOST into openssl as a side effect.
* Only available if GOST is compiled into the library and openssl.
* \return the gost id for EVP_CTX creation.
*/
int gldns_key_EVP_load_gost_id(void);
/** Release the engine reference held for the GOST engine. */
void gldns_key_EVP_unload_gost(void);
/**
* Like gldns_key_buf2dsa, but uses raw buffer.
* \param[in] key the uncompressed wireformat of the key.
* \param[in] len length of key data
* \return a DSA * structure with the key material
*/
DSA *gldns_key_buf2dsa_raw(unsigned char* key, size_t len);
/**
* Converts a holding buffer with key material to EVP PKEY in openssl.
* Only available if ldns was compiled with GOST.
* \param[in] key data to convert
* \param[in] keylen length of the key data
* \return the key or NULL on error.
*/
EVP_PKEY* gldns_gost2pkey_raw(unsigned char* key, size_t keylen);
/**
* Converts a holding buffer with key material to EVP PKEY in openssl.
* Only available if ldns was compiled with ECDSA.
* \param[in] key data to convert
* \param[in] keylen length of the key data
* \param[in] algo precise algorithm to initialize ECC group values.
* \return the key or NULL on error.
*/
EVP_PKEY* gldns_ecdsa2pkey_raw(unsigned char* key, size_t keylen, uint8_t algo);
/**
* Like gldns_key_buf2rsa, but uses raw buffer.
* \param[in] key the uncompressed wireformat of the key.
* \param[in] len length of key data
* \return a RSA * structure with the key material
*/
RSA *gldns_key_buf2rsa_raw(unsigned char* key, size_t len);
/**
* Converts a holding buffer with key material to EVP PKEY in openssl.
* Only available if ldns was compiled with ED25519.
* \param[in] key the uncompressed wireformat of the key.
* \param[in] len length of key data
* \return the key or NULL on error.
*/
EVP_PKEY* gldns_ed255192pkey_raw(const unsigned char* key, size_t len);
/**
* Converts a holding buffer with key material to EVP PKEY in openssl.
* Only available if ldns was compiled with ED448.
* \param[in] key the uncompressed wireformat of the key.
* \param[in] len length of key data
* \return the key or NULL on error.
*/
EVP_PKEY* gldns_ed4482pkey_raw(const unsigned char* key, size_t len);
/**
* Utility function to calculate hash using generic EVP_MD pointer.
* \param[in] data the data to hash.
* \param[in] len length of data.
* \param[out] dest the destination of the hash, must be large enough.
* \param[in] md the message digest to use.
* \return true if worked, false on failure.
*/
int gldns_digest_evp(unsigned char* data, unsigned int len,
unsigned char* dest, const EVP_MD* md);
#endif /* GLDNS_BUILD_CONFIG_HAVE_SSL */
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif

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/*
* keyraw.c - raw key operations and conversions - OpenSSL version
*
* (c) NLnet Labs, 2004-2008
*
* See the file LICENSE for the license
*/
/**
* \file
* Implementation of raw DNSKEY functions (work on wire rdata).
*/
#include "config.h"
#include "gldns/keyraw.h"
#include "gldns/rrdef.h"
#ifdef HAVE_SSL
#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include <openssl/md5.h>
#ifdef HAVE_OPENSSL_ENGINE_H
# include <openssl/engine.h>
#endif
#ifdef HAVE_OPENSSL_BN_H
#include <openssl/bn.h>
#endif
#ifdef HAVE_OPENSSL_RSA_H
#include <openssl/rsa.h>
#endif
#ifdef HAVE_OPENSSL_DSA_H
#include <openssl/dsa.h>
#endif
#endif /* HAVE_SSL */
#ifdef HAVE_SSL
#ifdef USE_GOST
/** store GOST engine reference loaded into OpenSSL library */
ENGINE* gldns_gost_engine = NULL;
int
gldns_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 */
gldns_gost_engine = e;
EVP_PKEY_asn1_get0_info(&gost_id, NULL, NULL, NULL, NULL, meth);
return gost_id;
}
void gldns_key_EVP_unload_gost(void)
{
if(gldns_gost_engine) {
ENGINE_finish(gldns_gost_engine);
ENGINE_free(gldns_gost_engine);
gldns_gost_engine = NULL;
}
}
#endif /* USE_GOST */
DSA *
gldns_key_buf2dsa_raw(unsigned char* key, size_t len)
{
uint8_t T;
uint16_t length;
uint16_t offset;
DSA *dsa;
BIGNUM *Q; BIGNUM *P;
BIGNUM *G; BIGNUM *Y;
if(len == 0)
return NULL;
T = (uint8_t)key[0];
length = (64 + T * 8);
offset = 1;
if (T > 8) {
return NULL;
}
if(len < (size_t)1 + SHA_DIGEST_LENGTH + 3*length)
return NULL;
Q = BN_bin2bn(key+offset, SHA_DIGEST_LENGTH, NULL);
offset += SHA_DIGEST_LENGTH;
P = BN_bin2bn(key+offset, (int)length, NULL);
offset += length;
G = BN_bin2bn(key+offset, (int)length, NULL);
offset += length;
Y = BN_bin2bn(key+offset, (int)length, NULL);
/* create the key and set its properties */
if(!Q || !P || !G || !Y || !(dsa = DSA_new())) {
BN_free(Q);
BN_free(P);
BN_free(G);
BN_free(Y);
return NULL;
}
if (!DSA_set0_pqg(dsa, P, Q, G)) {
/* QPG not yet attached, need to free */
BN_free(Q);
BN_free(P);
BN_free(G);
DSA_free(dsa);
BN_free(Y);
return NULL;
}
if (!DSA_set0_key(dsa, Y, NULL)) {
/* QPG attached, cleaned up by DSA_fre() */
DSA_free(dsa);
BN_free(Y);
return NULL;
}
return dsa;
}
RSA *
gldns_key_buf2rsa_raw(unsigned char* key, size_t len)
{
uint16_t offset;
uint16_t exp;
uint16_t int16;
RSA *rsa;
BIGNUM *modulus;
BIGNUM *exponent;
if (len == 0)
return NULL;
if (key[0] == 0) {
if(len < 3)
return NULL;
memmove(&int16, key+1, 2);
exp = ntohs(int16);
offset = 3;
} else {
exp = key[0];
offset = 1;
}
/* key length at least one */
if(len < (size_t)offset + exp + 1)
return NULL;
/* Exponent */
exponent = BN_new();
if(!exponent) return NULL;
(void) BN_bin2bn(key+offset, (int)exp, exponent);
offset += exp;
/* Modulus */
modulus = BN_new();
if(!modulus) {
BN_free(exponent);
return NULL;
}
/* length of the buffer must match the key length! */
(void) BN_bin2bn(key+offset, (int)(len - offset), modulus);
rsa = RSA_new();
if(!rsa) {
BN_free(exponent);
BN_free(modulus);
return NULL;
}
if (!RSA_set0_key(rsa, modulus, exponent, NULL)) {
BN_free(exponent);
BN_free(modulus);
RSA_free(rsa);
return NULL;
}
return rsa;
}
#ifdef USE_GOST
EVP_PKEY*
gldns_gost2pkey_raw(unsigned char* key, size_t keylen)
{
/* prefix header for X509 encoding */
uint8_t asn[37] = { 0x30, 0x63, 0x30, 0x1c, 0x06, 0x06, 0x2a, 0x85,
0x03, 0x02, 0x02, 0x13, 0x30, 0x12, 0x06, 0x07, 0x2a, 0x85,
0x03, 0x02, 0x02, 0x23, 0x01, 0x06, 0x07, 0x2a, 0x85, 0x03,
0x02, 0x02, 0x1e, 0x01, 0x03, 0x43, 0x00, 0x04, 0x40};
unsigned char encoded[37+64];
const unsigned char* pp;
if(keylen != 64) {
/* key wrong size */
return NULL;
}
/* create evp_key */
memmove(encoded, asn, 37);
memmove(encoded+37, key, 64);
pp = (unsigned char*)&encoded[0];
return d2i_PUBKEY(NULL, &pp, (int)sizeof(encoded));
}
#endif /* USE_GOST */
#ifdef USE_ECDSA
EVP_PKEY*
gldns_ecdsa2pkey_raw(unsigned char* key, size_t keylen, uint8_t algo)
{
unsigned char buf[256+2]; /* sufficient for 2*384/8+1 */
const unsigned char* pp = buf;
EVP_PKEY *evp_key;
EC_KEY *ec;
/* check length, which uncompressed must be 2 bignums */
if(algo == GLDNS_ECDSAP256SHA256) {
if(keylen != 2*256/8) return NULL;
ec = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
} else if(algo == GLDNS_ECDSAP384SHA384) {
if(keylen != 2*384/8) return NULL;
ec = EC_KEY_new_by_curve_name(NID_secp384r1);
} else ec = NULL;
if(!ec) return NULL;
if(keylen+1 > sizeof(buf)) { /* sanity check */
EC_KEY_free(ec);
return NULL;
}
/* prepend the 0x02 (from docs) (or actually 0x04 from implementation
* of openssl) for uncompressed data */
buf[0] = POINT_CONVERSION_UNCOMPRESSED;
memmove(buf+1, key, keylen);
if(!o2i_ECPublicKey(&ec, &pp, (int)keylen+1)) {
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 /* USE_ECDSA */
#ifdef USE_ED25519
EVP_PKEY*
gldns_ed255192pkey_raw(const unsigned char* key, size_t keylen)
{
/* ASN1 for ED25519 is 302a300506032b6570032100 <32byteskey> */
uint8_t pre[] = {0x30, 0x2a, 0x30, 0x05, 0x06, 0x03, 0x2b, 0x65,
0x70, 0x03, 0x21, 0x00};
int pre_len = 12;
uint8_t buf[256];
EVP_PKEY *evp_key;
/* pp gets modified by d2i() */
const unsigned char* pp = (unsigned char*)buf;
if(keylen != 32 || keylen + pre_len > sizeof(buf))
return NULL; /* wrong length */
memmove(buf, pre, pre_len);
memmove(buf+pre_len, key, keylen);
evp_key = d2i_PUBKEY(NULL, &pp, (int)(pre_len+keylen));
return evp_key;
}
#endif /* USE_ED25519 */
#ifdef USE_ED448
EVP_PKEY*
gldns_ed4482pkey_raw(const unsigned char* key, size_t keylen)
{
/* ASN1 for ED448 is 3043300506032b6571033a00 <57byteskey> */
uint8_t pre[] = {0x30, 0x43, 0x30, 0x05, 0x06, 0x03, 0x2b, 0x65,
0x71, 0x03, 0x3a, 0x00};
int pre_len = 12;
uint8_t buf[256];
EVP_PKEY *evp_key;
/* pp gets modified by d2i() */
const unsigned char* pp = (unsigned char*)buf;
if(keylen != 57 || keylen + pre_len > sizeof(buf))
return NULL; /* wrong length */
memmove(buf, pre, pre_len);
memmove(buf+pre_len, key, keylen);
evp_key = d2i_PUBKEY(NULL, &pp, (int)(pre_len+keylen));
return evp_key;
}
#endif /* USE_ED448 */
int
gldns_digest_evp(unsigned char* data, unsigned int len, unsigned char* dest,
const EVP_MD* md)
{
EVP_MD_CTX* ctx;
ctx = EVP_MD_CTX_create();
if(!ctx)
return 0;
if(!EVP_DigestInit_ex(ctx, md, NULL) ||
!EVP_DigestUpdate(ctx, data, len) ||
!EVP_DigestFinal_ex(ctx, dest, NULL)) {
EVP_MD_CTX_destroy(ctx);
return 0;
}
EVP_MD_CTX_destroy(ctx);
return 1;
}
#endif /* HAVE_SSL */

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/*
* keyraw.h -- raw key and signature access and conversion - OpenSSL
*
* Copyright (c) 2005-2008, NLnet Labs. All rights reserved.
*
* See LICENSE for the license.
*
*/
/**
* \file
*
* raw key and signature access and conversion
*
* Since those functions heavily rely op cryptographic operations,
* this module is dependent on openssl.
*
*/
#ifndef GLDNS_KEYRAW_INTERNAL_H
#define GLDNS_KEYRAW_INTERNAL_H
#ifdef __cplusplus
extern "C" {
#endif
#if GLDNS_BUILD_CONFIG_HAVE_SSL
# include <openssl/ssl.h>
# include <openssl/evp.h>
/**
* Get the PKEY id for GOST, loads GOST into openssl as a side effect.
* Only available if GOST is compiled into the library and openssl.
* \return the gost id for EVP_CTX creation.
*/
int gldns_key_EVP_load_gost_id(void);
/** Release the engine reference held for the GOST engine. */
void gldns_key_EVP_unload_gost(void);
/**
* Like gldns_key_buf2dsa, but uses raw buffer.
* \param[in] key the uncompressed wireformat of the key.
* \param[in] len length of key data
* \return a DSA * structure with the key material
*/
DSA *gldns_key_buf2dsa_raw(unsigned char* key, size_t len);
/**
* Converts a holding buffer with key material to EVP PKEY in openssl.
* Only available if ldns was compiled with GOST.
* \param[in] key data to convert
* \param[in] keylen length of the key data
* \return the key or NULL on error.
*/
EVP_PKEY* gldns_gost2pkey_raw(unsigned char* key, size_t keylen);
/**
* Converts a holding buffer with key material to EVP PKEY in openssl.
* Only available if ldns was compiled with ECDSA.
* \param[in] key data to convert
* \param[in] keylen length of the key data
* \param[in] algo precise algorithm to initialize ECC group values.
* \return the key or NULL on error.
*/
EVP_PKEY* gldns_ecdsa2pkey_raw(unsigned char* key, size_t keylen, uint8_t algo);
/**
* Like gldns_key_buf2rsa, but uses raw buffer.
* \param[in] key the uncompressed wireformat of the key.
* \param[in] len length of key data
* \return a RSA * structure with the key material
*/
RSA *gldns_key_buf2rsa_raw(unsigned char* key, size_t len);
/**
* Converts a holding buffer with key material to EVP PKEY in openssl.
* Only available if ldns was compiled with ED25519.
* \param[in] key the uncompressed wireformat of the key.
* \param[in] len length of key data
* \return the key or NULL on error.
*/
EVP_PKEY* gldns_ed255192pkey_raw(const unsigned char* key, size_t len);
/**
* Converts a holding buffer with key material to EVP PKEY in openssl.
* Only available if ldns was compiled with ED448.
* \param[in] key the uncompressed wireformat of the key.
* \param[in] len length of key data
* \return the key or NULL on error.
*/
EVP_PKEY* gldns_ed4482pkey_raw(const unsigned char* key, size_t len);
/**
* Utility function to calculate hash using generic EVP_MD pointer.
* \param[in] data the data to hash.
* \param[in] len length of data.
* \param[out] dest the destination of the hash, must be large enough.
* \param[in] md the message digest to use.
* \return true if worked, false on failure.
*/
int gldns_digest_evp(unsigned char* data, unsigned int len,
unsigned char* dest, const EVP_MD* md);
#endif /* GLDNS_BUILD_CONFIG_HAVE_SSL */
#ifdef __cplusplus
}
#endif
#endif /* GLDNS_KEYRAW_INTERNAL_H */