wbrawner/openssl
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Implement Supported Elliptic Curves Extension.

Browse source 
Submitted by: Douglas Stebila
This commit is contained in:
Bodo Möller 2006-03-30 02:44:56 +00:00
parent bcbe37b716
commit 332737217a
9 changed files with 333 additions and 157 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
CHANGES
View file

@ -4,6 +4,10 @@
Changes between 0.9.8a and 0.9.9 [xx XXX xxxx]
*) Implement the Supported Elliptic Curves Extension for
ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
[Douglas Stebila]
*) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
EVP_CIPHER structures to avoid later problems in EVP_cleanup().
[Steve Henson]

46
ssl/s3_clnt.c
View file

@ -165,7 +165,6 @@ static const SSL_METHOD *ssl3_get_client_method(int ver);
static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
#ifndef OPENSSL_NO_ECDH
static int curve_id2nid(int curve_id);
int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);
#endif
@ -1332,7 +1331,7 @@ int ssl3_get_key_exchange(SSL *s)
param_len=3;
if ((param_len > n) ||
(*p != NAMED_CURVE_TYPE) ||
((curve_nid = curve_id2nid(*(p + 2))) == 0))
((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
{
al=SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
@ -2609,46 +2608,3 @@ f_err:
err:
return(0);
}
#ifndef OPENSSL_NO_ECDH
/* This is the complement of nid2curve_id in s3_srvr.c. */
static int curve_id2nid(int curve_id)
{
/* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
* (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
static int nid_list[26] =
{
0,
NID_sect163k1, /* sect163k1 (1) */
NID_sect163r1, /* sect163r1 (2) */
NID_sect163r2, /* sect163r2 (3) */
NID_sect193r1, /* sect193r1 (4) */
NID_sect193r2, /* sect193r2 (5) */
NID_sect233k1, /* sect233k1 (6) */
NID_sect233r1, /* sect233r1 (7) */
NID_sect239k1, /* sect239k1 (8) */
NID_sect283k1, /* sect283k1 (9) */
NID_sect283r1, /* sect283r1 (10) */
NID_sect409k1, /* sect409k1 (11) */
NID_sect409r1, /* sect409r1 (12) */
NID_sect571k1, /* sect571k1 (13) */
NID_sect571r1, /* sect571r1 (14) */
NID_secp160k1, /* secp160k1 (15) */
NID_secp160r1, /* secp160r1 (16) */
NID_secp160r2, /* secp160r2 (17) */
NID_secp192k1, /* secp192k1 (18) */
NID_X9_62_prime192v1, /* secp192r1 (19) */
NID_secp224k1, /* secp224k1 (20) */
NID_secp224r1, /* secp224r1 (21) */
NID_secp256k1, /* secp256k1 (22) */
NID_X9_62_prime256v1, /* secp256r1 (23) */
NID_secp384r1, /* secp384r1 (24) */
NID_secp521r1 /* secp521r1 (25) */
};
if ((curve_id < 1) || (curve_id > 25)) return 0;
return nid_list[curve_id];
}
#endif

101
ssl/s3_lib.c
View file

@ -2046,7 +2046,9 @@ SSL_CIPHER *ssl3_choose_cipher(SSL *s, STACK_OF(SSL_CIPHER) *clnt,
int i,j,ok;
#ifndef OPENSSL_NO_TLSEXT
#ifndef OPENSSL_NO_EC
int ec_ok;
int ec_ok, ec_nid;
unsigned char ec_search1, ec_search2;
unsigned char *ec_ptr;
#endif /* OPENSSL_NO_EC */
#endif /* OPENSSL_NO_TLSEXT */
CERT *cert;
@ -2188,6 +2190,103 @@ SSL_CIPHER *ssl3_choose_cipher(SSL *s, STACK_OF(SSL_CIPHER) *clnt,
}
ok = ok && ec_ok;
}
if (
/* if we are considering an ECC cipher suite that uses our certificate */
(alg & SSL_aECDSA)
/* and we have an ECC certificate */
&& (s->cert->pkeys[SSL_PKEY_ECC].x509 != NULL)
/* and the client specified an EllipticCurves extension */
&& ((s->session->tlsext_ellipticcurvelist_length > 0) && (s->session->tlsext_ellipticcurvelist != NULL))
)
{
ec_ok = 0;
if (
(s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec != NULL)
&& (s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec->group != NULL)
)
{
ec_nid = EC_GROUP_get_curve_name(s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec->group);
if ((ec_nid == 0)
&& (s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec->group->meth != NULL)
)
{
if (EC_METHOD_get_field_type(s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec->group->meth) == NID_X9_62_prime_field)
{
ec_search1 = 0xFF;
ec_search2 = 0x01;
}
else if (EC_METHOD_get_field_type(s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec->group->meth) == NID_X9_62_characteristic_two_field)
{
ec_search1 = 0xFF;
ec_search2 = 0x02;
}
}
else
{
ec_search1 = 0x00;
ec_search2 = tls1_ec_nid2curve_id(ec_nid);
}
if ((ec_search1 != 0) || (ec_search2 != 0))
{
for (j = 0; j < s->session->tlsext_ellipticcurvelist_length / 2; j++)
{
if ((s->session->tlsext_ellipticcurvelist[2*j] == ec_search1) && (s->session->tlsext_ellipticcurvelist[2*j+1] == ec_search2))
{
ec_ok = 1;
break;
}
}
}
}
ok = ok && ec_ok;
}
if (
/* if we are considering an ECC cipher suite that uses an ephemeral EC key */
((alg & SSL_kECDH) || (alg & SSL_kECDHE))
/* and we have an ephemeral EC key */
&& (s->cert->ecdh_tmp != NULL)
/* and the client specified an EllipticCurves extension */
&& ((s->session->tlsext_ellipticcurvelist_length > 0) && (s->session->tlsext_ellipticcurvelist != NULL))
)
{
ec_ok = 0;
if (s->cert->ecdh_tmp->group != NULL)
{
ec_nid = EC_GROUP_get_curve_name(s->cert->ecdh_tmp->group);
if ((ec_nid == 0)
&& (s->cert->ecdh_tmp->group->meth != NULL)
)
{
if (EC_METHOD_get_field_type(s->cert->ecdh_tmp->group->meth) == NID_X9_62_prime_field)
{
ec_search1 = 0xFF;
ec_search2 = 0x01;
}
else if (EC_METHOD_get_field_type(s->cert->ecdh_tmp->group->meth) == NID_X9_62_characteristic_two_field)
{
ec_search1 = 0xFF;
ec_search2 = 0x02;
}
}
else
{
ec_search1 = 0x00;
ec_search2 = tls1_ec_nid2curve_id(ec_nid);
}
if ((ec_search1 != 0) || (ec_search2 != 0))
{
for (j = 0; j < s->session->tlsext_ellipticcurvelist_length / 2; j++)
{
if ((s->session->tlsext_ellipticcurvelist[2*j] == ec_search1) && (s->session->tlsext_ellipticcurvelist[2*j+1] == ec_search2))
{
ec_ok = 1;
break;
}
}
}
}
ok = ok && ec_ok;
}
#endif /* OPENSSL_NO_EC */
#endif /* OPENSSL_NO_TLSEXT */

70
ssl/s3_srvr.c
View file

@ -170,10 +170,6 @@
static const SSL_METHOD *ssl3_get_server_method(int ver);
#ifndef OPENSSL_NO_ECDH
static int nid2curve_id(int nid);
#endif
static const SSL_METHOD *ssl3_get_server_method(int ver)
{
if (ver == SSL3_VERSION)
@ -1376,7 +1372,7 @@ int ssl3_send_server_key_exchange(SSL *s)
* supported named curves, curve_id is non-zero.
*/
if ((curve_id =
nid2curve_id(EC_GROUP_get_curve_name(group)))
tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
== 0)
{
SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
@ -2696,67 +2692,3 @@ int ssl3_send_server_certificate(SSL *s)
/* SSL3_ST_SW_CERT_B */
return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
}
#ifndef OPENSSL_NO_ECDH
/* This is the complement of curve_id2nid in s3_clnt.c. */
static int nid2curve_id(int nid)
{
/* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
* (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
switch (nid) {
case NID_sect163k1: /* sect163k1 (1) */
return 1;
case NID_sect163r1: /* sect163r1 (2) */
return 2;
case NID_sect163r2: /* sect163r2 (3) */
return 3;
case NID_sect193r1: /* sect193r1 (4) */
return 4;
case NID_sect193r2: /* sect193r2 (5) */
return 5;
case NID_sect233k1: /* sect233k1 (6) */
return 6;
case NID_sect233r1: /* sect233r1 (7) */
return 7;
case NID_sect239k1: /* sect239k1 (8) */
return 8;
case NID_sect283k1: /* sect283k1 (9) */
return 9;
case NID_sect283r1: /* sect283r1 (10) */
return 10;
case NID_sect409k1: /* sect409k1 (11) */
return 11;
case NID_sect409r1: /* sect409r1 (12) */
return 12;
case NID_sect571k1: /* sect571k1 (13) */
return 13;
case NID_sect571r1: /* sect571r1 (14) */
return 14;
case NID_secp160k1: /* secp160k1 (15) */
return 15;
case NID_secp160r1: /* secp160r1 (16) */
return 16;
case NID_secp160r2: /* secp160r2 (17) */
return 17;
case NID_secp192k1: /* secp192k1 (18) */
return 18;
case NID_X9_62_prime192v1: /* secp192r1 (19) */
return 19;
case NID_secp224k1: /* secp224k1 (20) */
return 20;
case NID_secp224r1: /* secp224r1 (21) */
return 21;
case NID_secp256k1: /* secp256k1 (22) */
return 22;
case NID_X9_62_prime256v1: /* secp256r1 (23) */
return 23;
case NID_secp384r1: /* secp384r1 (24) */
return 24;
case NID_secp521r1: /* secp521r1 (25) */
return 25;
default:
return 0;
}
}
#endif

4
ssl/ssl.h
View file

@ -512,6 +512,8 @@ typedef struct ssl_session_st
#ifndef OPENSSL_NO_EC
size_t tlsext_ecpointformatlist_length;
unsigned char *tlsext_ecpointformatlist; /* peer's list */
size_t tlsext_ellipticcurvelist_length;
unsigned char *tlsext_ellipticcurvelist; /* peer's list */
#endif /* OPENSSL_NO_EC */
#endif
} SSL_SESSION;
@ -1066,6 +1068,8 @@ struct ssl_st
#ifndef OPENSSL_NO_EC
size_t tlsext_ecpointformatlist_length;
unsigned char *tlsext_ecpointformatlist; /* our list */
size_t tlsext_ellipticcurvelist_length;
unsigned char *tlsext_ellipticcurvelist; /* our list */
#endif /* OPENSSL_NO_EC */
SSL_CTX * initial_ctx; /* initial ctx, used to store sessions */
#define session_ctx initial_ctx

38
ssl/ssl_asn1.c
View file

@ -108,6 +108,7 @@ typedef struct ssl_session_asn1_st
ASN1_OCTET_STRING tlsext_hostname;
#ifndef OPENSSL_NO_EC
ASN1_OCTET_STRING tlsext_ecpointformatlist;
ASN1_OCTET_STRING tlsext_ellipticcurvelist;
#endif /* OPENSSL_NO_EC */
#endif /* OPENSSL_NO_TLSEXT */
#ifndef OPENSSL_NO_PSK
@ -119,7 +120,7 @@ typedef struct ssl_session_asn1_st
int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
{
#define LSIZE2 (sizeof(long)*2)
int v1=0,v2=0,v3=0,v4=0,v5=0,v6=0,v7=0,v8=0,v9=0;
int v1=0,v2=0,v3=0,v4=0,v5=0,v6=0,v7=0,v8=0,v9=0,v10=0;
unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2];
long l;
@ -228,6 +229,12 @@ int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
a.tlsext_ecpointformatlist.type=V_ASN1_OCTET_STRING;
a.tlsext_ecpointformatlist.data=(unsigned char *)in->tlsext_ecpointformatlist;
}
if (in->tlsext_ellipticcurvelist)
{
a.tlsext_ellipticcurvelist.length=in->tlsext_ellipticcurvelist_length;
a.tlsext_ellipticcurvelist.type=V_ASN1_OCTET_STRING;
a.tlsext_ellipticcurvelist.data=(unsigned char *)in->tlsext_ellipticcurvelist;
}
#endif /* OPENSSL_NO_EC */
#endif /* OPENSSL_NO_TLSEXT */
#ifndef OPENSSL_NO_PSK
@ -272,13 +279,15 @@ int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
#ifndef OPENSSL_NO_EC
if (in->tlsext_ecpointformatlist)
M_ASN1_I2D_len_EXP_opt(&(a.tlsext_ecpointformatlist), i2d_ASN1_OCTET_STRING,7,v7);
if (in->tlsext_ellipticcurvelist)
M_ASN1_I2D_len_EXP_opt(&(a.tlsext_ellipticcurvelist), i2d_ASN1_OCTET_STRING,8,v8);
#endif /* OPENSSL_NO_EC */
#endif /* OPENSSL_NO_TLSEXT */
#ifndef OPENSSL_NO_PSK
if (in->psk_identity_hint)
M_ASN1_I2D_len_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,8,v8);
M_ASN1_I2D_len_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,9,v9);
if (in->psk_identity)
M_ASN1_I2D_len_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING,9,v9);
M_ASN1_I2D_len_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING,10,v10);
#endif /* OPENSSL_NO_PSK */
M_ASN1_I2D_seq_total();
@ -310,13 +319,15 @@ int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
#ifndef OPENSSL_NO_EC
if (in->tlsext_ecpointformatlist)
M_ASN1_I2D_put_EXP_opt(&(a.tlsext_ecpointformatlist), i2d_ASN1_OCTET_STRING,7,v7);
if (in->tlsext_ellipticcurvelist)
M_ASN1_I2D_put_EXP_opt(&(a.tlsext_ellipticcurvelist), i2d_ASN1_OCTET_STRING,8,v8);
#endif /* OPENSSL_NO_EC */
#endif /* OPENSSL_NO_TLSEXT */
#ifndef OPENSSL_NO_PSK
if (in->psk_identity_hint)
M_ASN1_I2D_put_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,8,v8);
M_ASN1_I2D_put_EXP_opt(&(a.psk_identity_hint), i2d_ASN1_OCTET_STRING,9,v9);
if (in->psk_identity)
M_ASN1_I2D_put_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING,9,v9);
M_ASN1_I2D_put_EXP_opt(&(a.psk_identity), i2d_ASN1_OCTET_STRING,10,v10);
#endif /* OPENSSL_NO_PSK */
M_ASN1_I2D_finish();
}
@ -517,13 +528,26 @@ SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
else
ret->tlsext_ecpointformatlist_length=0;
ret->tlsext_ecpointformatlist=NULL;
os.length=0;
M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,8);
if (os.data)
{
ret->tlsext_ellipticcurvelist_length=os.length;
memcpy(ret->tlsext_ellipticcurvelist,os.data,ret->tlsext_ellipticcurvelist_length);
OPENSSL_free(os.data);
os.data = NULL;
os.length = 0;
}
else
ret->tlsext_ellipticcurvelist_length=0;
ret->tlsext_ellipticcurvelist=NULL;
#endif /* OPENSSL_NO_EC */
#endif /* OPENSSL_NO_TLSEXT */
#ifndef OPENSSL_NO_PSK
os.length=0;
os.data=NULL;
M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,8);
M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,9);
if (os.data)
{
ret->psk_identity_hint = BUF_strndup((char *)os.data, os.length);
@ -536,7 +560,7 @@ SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
os.length=0;
os.data=NULL;
M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,9);
M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,10);
if (os.data)
{
ret->psk_identity = BUF_strndup((char *)os.data, os.length);

5
ssl/ssl_locl.h
View file

@ -970,6 +970,11 @@ int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);
SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n);
#ifndef OPENSSL_NO_EC
int tls1_ec_curve_id2nid(int curve_id);
int tls1_ec_nid2curve_id(int nid);
#endif /* OPENSSL_NO_EC */
#ifndef OPENSSL_NO_TLSEXT
unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit);
unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit);

16
ssl/ssl_sess.c
View file

@ -206,6 +206,8 @@ SSL_SESSION *SSL_SESSION_new(void)
#ifndef OPENSSL_NO_EC
ss->tlsext_ecpointformatlist_length = 0;
ss->tlsext_ecpointformatlist = NULL;
ss->tlsext_ellipticcurvelist_length = 0;
ss->tlsext_ellipticcurvelist = NULL;
#endif
#endif
CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
@ -369,6 +371,18 @@ int ssl_get_new_session(SSL *s, int session)
ss->tlsext_ecpointformatlist_length = s->tlsext_ecpointformatlist_length;
memcpy(ss->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
}
if (s->tlsext_ellipticcurvelist)
{
if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(ss->tlsext_ellipticcurvelist);
if ((ss->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
{
SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_FAILURE);
SSL_SESSION_free(ss);
return 0;
}
ss->tlsext_ellipticcurvelist_length = s->tlsext_ellipticcurvelist_length;
memcpy(ss->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
}
#endif
#endif
}
@ -665,6 +679,8 @@ void SSL_SESSION_free(SSL_SESSION *ss)
#ifndef OPENSSL_NO_EC
ss->tlsext_ecpointformatlist_length = 0;
if (ss->tlsext_ecpointformatlist != NULL) OPENSSL_free(ss->tlsext_ecpointformatlist);
ss->tlsext_ellipticcurvelist_length = 0;
if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(ss->tlsext_ellipticcurvelist);
#endif /* OPENSSL_NO_EC */
#endif
#ifndef OPENSSL_NO_PSK

206
ssl/t1_lib.c
View file

@ -201,6 +201,26 @@ unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned cha
memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
ret+=s->tlsext_ecpointformatlist_length;
}
if (s->tlsext_ellipticcurvelist != NULL)
{
/* Add TLS extension EllipticCurves to the ClientHello message */
long lenmax;
if ((lenmax = limit - p - 5) < 0) return NULL;
if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
if (s->tlsext_ellipticcurvelist_length > 255)
{
SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
return NULL;
}
s2n(TLSEXT_TYPE_elliptic_curves,ret);
s2n(s->tlsext_ellipticcurvelist_length + 2,ret);
*(ret++) = (unsigned char) ((s->tlsext_ellipticcurvelist_length >> 8) & 0xFF);
*(ret++) = (unsigned char) (s->tlsext_ellipticcurvelist_length & 0xFF);
memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
ret+=s->tlsext_ellipticcurvelist_length;
}
#endif /* OPENSSL_NO_EC */
if ((extdatalen = ret-p-2)== 0)
@ -245,6 +265,7 @@ unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned cha
memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
ret+=s->tlsext_ecpointformatlist_length;
}
/* Currently the server should not respond with a SupportedCurves extension */
#endif /* OPENSSL_NO_EC */
if ((extdatalen = ret-p-2)== 0)
@ -382,6 +403,34 @@ int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
fprintf(stderr,"%i ",*(sdata++));
fprintf(stderr,"\n");
#endif
}
else if (type == TLSEXT_TYPE_elliptic_curves)
{
unsigned char *sdata = data;
int ellipticcurvelist_length = (*(sdata++) << 8);
ellipticcurvelist_length += (*(sdata++));
if (ellipticcurvelist_length != size - 2)
{
*al = TLS1_AD_DECODE_ERROR;
return 0;
}
s->session->tlsext_ellipticcurvelist_length = 0;
if (s->session->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->session->tlsext_ellipticcurvelist);
if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
{
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
#if 0
fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
sdata = s->session->tlsext_ellipticcurvelist;
for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
fprintf(stderr,"%i ",*(sdata++));
fprintf(stderr,"\n");
#endif
}
#endif /* OPENSSL_NO_EC */
@ -400,9 +449,6 @@ int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
unsigned char *data = *p;
int tlsext_servername = 0;
#ifndef OPENSSL_NO_EC
int tlsext_ecpointformats = 0;
#endif /* OPENSSL_NO_EC */
if (data >= (d+n-2))
return 1;
@ -486,31 +532,6 @@ int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
}
}
#ifndef OPENSSL_NO_EC
if (!s->hit && tlsext_ecpointformats == 1)
{
if (s->tlsext_ecpointformatlist)
{
if (s->session->tlsext_ecpointformatlist == NULL)
{
s->session->tlsext_ecpointformatlist_length = s->tlsext_ecpointformatlist_length;
if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(s->tlsext_ecpointformatlist_length)) == NULL)
{
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
memcpy(s->session->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
}
else
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
}
}
#endif /* OPENSSL_NO_EC */
*p = data;
return 1;
}
@ -518,11 +539,12 @@ int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
int ssl_prepare_clienthello_tlsext(SSL *s)
{
#ifndef OPENSSL_NO_EC
/* If we are client and using an elliptic curve cryptography cipher suite, send the point formats we
* support.
/* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
* and elliptic curves we support.
*/
int using_ecc = 0;
int i;
unsigned char *j;
int algs;
STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
@ -548,6 +570,19 @@ int ssl_prepare_clienthello_tlsext(SSL *s)
s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
/* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(50)) == NULL)
{
SSLerr(SSL_F_TLS1_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
return -1;
}
s->tlsext_ellipticcurvelist_length = 50;
for (i = 1, j = s->tlsext_ellipticcurvelist; i <= 25; i++)
{
*(j++) = 0x00;
*(j++) = i;
}
}
#endif /* OPENSSL_NO_EC */
return 1;
@ -557,7 +592,8 @@ int ssl_prepare_serverhello_tlsext(SSL *s)
{
#ifndef OPENSSL_NO_EC
/* If we are server and using an ECC cipher suite, send the point formats we support
* if the client sent us an ECPointsFormat extension.
* if the client sent us an ECPointsFormat extension. Note that the server is not
* supposed to send an EllipticCurves extension.
*/
int algs = s->s3->tmp.new_cipher->algorithms;
int using_ecc = (algs & SSL_kECDH) || (algs & SSL_kECDHE) || (algs & SSL_aECDSA);
@ -586,10 +622,11 @@ int ssl_check_clienthello_tlsext(SSL *s)
int al = SSL_AD_UNRECOGNIZED_NAME;
#ifndef OPENSSL_NO_EC
/* If we are server and using an elliptic curve cyrptography cipher suite, then we don't
* need to check EC point formats since all clients must support uncompressed and it's the
* only thing we support; we just need to copy the data in. We probably ought to check it
* for validity, but we never use it.
/* The handling of the ECPointFormats extension is done elsewhere, namely in
* ssl3_choose_cipher in s3_lib.c.
*/
/* The handling of the EllipticCurves extension is done elsewhere, namely in
* ssl3_choose_cipher in s3_lib.c.
*/
#endif
@ -675,3 +712,102 @@ int ssl_check_serverhello_tlsext(SSL *s)
}
}
#endif
#ifndef OPENSSL_NO_EC
int tls1_ec_curve_id2nid(int curve_id)
{
/* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
static int nid_list[26] =
{
0,
NID_sect163k1, /* sect163k1 (1) */
NID_sect163r1, /* sect163r1 (2) */
NID_sect163r2, /* sect163r2 (3) */
NID_sect193r1, /* sect193r1 (4) */
NID_sect193r2, /* sect193r2 (5) */
NID_sect233k1, /* sect233k1 (6) */
NID_sect233r1, /* sect233r1 (7) */
NID_sect239k1, /* sect239k1 (8) */
NID_sect283k1, /* sect283k1 (9) */
NID_sect283r1, /* sect283r1 (10) */
NID_sect409k1, /* sect409k1 (11) */
NID_sect409r1, /* sect409r1 (12) */
NID_sect571k1, /* sect571k1 (13) */
NID_sect571r1, /* sect571r1 (14) */
NID_secp160k1, /* secp160k1 (15) */
NID_secp160r1, /* secp160r1 (16) */
NID_secp160r2, /* secp160r2 (17) */
NID_secp192k1, /* secp192k1 (18) */
NID_X9_62_prime192v1, /* secp192r1 (19) */
NID_secp224k1, /* secp224k1 (20) */
NID_secp224r1, /* secp224r1 (21) */
NID_secp256k1, /* secp256k1 (22) */
NID_X9_62_prime256v1, /* secp256r1 (23) */
NID_secp384r1, /* secp384r1 (24) */
NID_secp521r1 /* secp521r1 (25) */
};
if ((curve_id < 1) || (curve_id > 25)) return 0;
return nid_list[curve_id];
}
int tls1_ec_nid2curve_id(int nid)
{
/* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
switch (nid) {
case NID_sect163k1: /* sect163k1 (1) */
return 1;
case NID_sect163r1: /* sect163r1 (2) */
return 2;
case NID_sect163r2: /* sect163r2 (3) */
return 3;
case NID_sect193r1: /* sect193r1 (4) */
return 4;
case NID_sect193r2: /* sect193r2 (5) */
return 5;
case NID_sect233k1: /* sect233k1 (6) */
return 6;
case NID_sect233r1: /* sect233r1 (7) */
return 7;
case NID_sect239k1: /* sect239k1 (8) */
return 8;
case NID_sect283k1: /* sect283k1 (9) */
return 9;
case NID_sect283r1: /* sect283r1 (10) */
return 10;
case NID_sect409k1: /* sect409k1 (11) */
return 11;
case NID_sect409r1: /* sect409r1 (12) */
return 12;
case NID_sect571k1: /* sect571k1 (13) */
return 13;
case NID_sect571r1: /* sect571r1 (14) */
return 14;
case NID_secp160k1: /* secp160k1 (15) */
return 15;
case NID_secp160r1: /* secp160r1 (16) */
return 16;
case NID_secp160r2: /* secp160r2 (17) */
return 17;
case NID_secp192k1: /* secp192k1 (18) */
return 18;
case NID_X9_62_prime192v1: /* secp192r1 (19) */
return 19;
case NID_secp224k1: /* secp224k1 (20) */
return 20;
case NID_secp224r1: /* secp224r1 (21) */
return 21;
case NID_secp256k1: /* secp256k1 (22) */
return 22;
case NID_X9_62_prime256v1: /* secp256r1 (23) */
return 23;
case NID_secp384r1: /* secp384r1 (24) */
return 24;
case NID_secp521r1: /* secp521r1 (25) */
return 25;
default:
return 0;
}
}
#endif /* OPENSSL_NO_EC */