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t1_lib.c
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t1_lib.c
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/*
* Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <stdlib.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/core_names.h>
#include <openssl/ocsp.h>
#include <openssl/conf.h>
#include <openssl/x509v3.h>
#include <openssl/dh.h>
#include <openssl/bn.h>
#include <openssl/provider.h>
#include <openssl/param_build.h>
#include "internal/nelem.h"
#include "internal/sizes.h"
#include "internal/tlsgroups.h"
#include "ssl_local.h"
#include <openssl/ct.h>
static const SIGALG_LOOKUP *find_sig_alg(SSL_CONNECTION *s, X509 *x, EVP_PKEY *pkey);
static int tls12_sigalg_allowed(const SSL_CONNECTION *s, int op, const SIGALG_LOOKUP *lu);
SSL3_ENC_METHOD const TLSv1_enc_data = {
tls1_setup_key_block,
tls1_generate_master_secret,
tls1_change_cipher_state,
tls1_final_finish_mac,
TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
tls1_alert_code,
tls1_export_keying_material,
0,
ssl3_set_handshake_header,
tls_close_construct_packet,
ssl3_handshake_write
};
SSL3_ENC_METHOD const TLSv1_1_enc_data = {
tls1_setup_key_block,
tls1_generate_master_secret,
tls1_change_cipher_state,
tls1_final_finish_mac,
TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
tls1_alert_code,
tls1_export_keying_material,
SSL_ENC_FLAG_EXPLICIT_IV,
ssl3_set_handshake_header,
tls_close_construct_packet,
ssl3_handshake_write
};
SSL3_ENC_METHOD const TLSv1_2_enc_data = {
tls1_setup_key_block,
tls1_generate_master_secret,
tls1_change_cipher_state,
tls1_final_finish_mac,
TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
tls1_alert_code,
tls1_export_keying_material,
SSL_ENC_FLAG_EXPLICIT_IV | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF
| SSL_ENC_FLAG_TLS1_2_CIPHERS,
ssl3_set_handshake_header,
tls_close_construct_packet,
ssl3_handshake_write
};
SSL3_ENC_METHOD const TLSv1_3_enc_data = {
tls13_setup_key_block,
tls13_generate_master_secret,
tls13_change_cipher_state,
tls13_final_finish_mac,
TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
tls13_alert_code,
tls13_export_keying_material,
SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF,
ssl3_set_handshake_header,
tls_close_construct_packet,
ssl3_handshake_write
};
OSSL_TIME tls1_default_timeout(void)
{
/*
* 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for
* http, the cache would over fill
*/
return ossl_seconds2time(60 * 60 * 2);
}
int tls1_new(SSL *s)
{
if (!ssl3_new(s))
return 0;
if (!s->method->ssl_clear(s))
return 0;
return 1;
}
void tls1_free(SSL *s)
{
SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
if (sc == NULL)
return;
OPENSSL_free(sc->ext.session_ticket);
ssl3_free(s);
}
int tls1_clear(SSL *s)
{
SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
if (sc == NULL)
return 0;
if (!ssl3_clear(s))
return 0;
if (s->method->version == TLS_ANY_VERSION)
sc->version = TLS_MAX_VERSION_INTERNAL;
else
sc->version = s->method->version;
return 1;
}
/* Legacy NID to group_id mapping. Only works for groups we know about */
static struct {
int nid;
uint16_t group_id;
} nid_to_group[] = {
{NID_sect163k1, OSSL_TLS_GROUP_ID_sect163k1},
{NID_sect163r1, OSSL_TLS_GROUP_ID_sect163r1},
{NID_sect163r2, OSSL_TLS_GROUP_ID_sect163r2},
{NID_sect193r1, OSSL_TLS_GROUP_ID_sect193r1},
{NID_sect193r2, OSSL_TLS_GROUP_ID_sect193r2},
{NID_sect233k1, OSSL_TLS_GROUP_ID_sect233k1},
{NID_sect233r1, OSSL_TLS_GROUP_ID_sect233r1},
{NID_sect239k1, OSSL_TLS_GROUP_ID_sect239k1},
{NID_sect283k1, OSSL_TLS_GROUP_ID_sect283k1},
{NID_sect283r1, OSSL_TLS_GROUP_ID_sect283r1},
{NID_sect409k1, OSSL_TLS_GROUP_ID_sect409k1},
{NID_sect409r1, OSSL_TLS_GROUP_ID_sect409r1},
{NID_sect571k1, OSSL_TLS_GROUP_ID_sect571k1},
{NID_sect571r1, OSSL_TLS_GROUP_ID_sect571r1},
{NID_secp160k1, OSSL_TLS_GROUP_ID_secp160k1},
{NID_secp160r1, OSSL_TLS_GROUP_ID_secp160r1},
{NID_secp160r2, OSSL_TLS_GROUP_ID_secp160r2},
{NID_secp192k1, OSSL_TLS_GROUP_ID_secp192k1},
{NID_X9_62_prime192v1, OSSL_TLS_GROUP_ID_secp192r1},
{NID_secp224k1, OSSL_TLS_GROUP_ID_secp224k1},
{NID_secp224r1, OSSL_TLS_GROUP_ID_secp224r1},
{NID_secp256k1, OSSL_TLS_GROUP_ID_secp256k1},
{NID_X9_62_prime256v1, OSSL_TLS_GROUP_ID_secp256r1},
{NID_secp384r1, OSSL_TLS_GROUP_ID_secp384r1},
{NID_secp521r1, OSSL_TLS_GROUP_ID_secp521r1},
{NID_brainpoolP256r1, OSSL_TLS_GROUP_ID_brainpoolP256r1},
{NID_brainpoolP384r1, OSSL_TLS_GROUP_ID_brainpoolP384r1},
{NID_brainpoolP512r1, OSSL_TLS_GROUP_ID_brainpoolP512r1},
{EVP_PKEY_X25519, OSSL_TLS_GROUP_ID_x25519},
{EVP_PKEY_X448, OSSL_TLS_GROUP_ID_x448},
{NID_brainpoolP256r1tls13, OSSL_TLS_GROUP_ID_brainpoolP256r1_tls13},
{NID_brainpoolP384r1tls13, OSSL_TLS_GROUP_ID_brainpoolP384r1_tls13},
{NID_brainpoolP512r1tls13, OSSL_TLS_GROUP_ID_brainpoolP512r1_tls13},
{NID_id_tc26_gost_3410_2012_256_paramSetA, OSSL_TLS_GROUP_ID_gc256A},
{NID_id_tc26_gost_3410_2012_256_paramSetB, OSSL_TLS_GROUP_ID_gc256B},
{NID_id_tc26_gost_3410_2012_256_paramSetC, OSSL_TLS_GROUP_ID_gc256C},
{NID_id_tc26_gost_3410_2012_256_paramSetD, OSSL_TLS_GROUP_ID_gc256D},
{NID_id_tc26_gost_3410_2012_512_paramSetA, OSSL_TLS_GROUP_ID_gc512A},
{NID_id_tc26_gost_3410_2012_512_paramSetB, OSSL_TLS_GROUP_ID_gc512B},
{NID_id_tc26_gost_3410_2012_512_paramSetC, OSSL_TLS_GROUP_ID_gc512C},
{NID_ffdhe2048, OSSL_TLS_GROUP_ID_ffdhe2048},
{NID_ffdhe3072, OSSL_TLS_GROUP_ID_ffdhe3072},
{NID_ffdhe4096, OSSL_TLS_GROUP_ID_ffdhe4096},
{NID_ffdhe6144, OSSL_TLS_GROUP_ID_ffdhe6144},
{NID_ffdhe8192, OSSL_TLS_GROUP_ID_ffdhe8192}
};
static const unsigned char ecformats_default[] = {
TLSEXT_ECPOINTFORMAT_uncompressed,
TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime,
TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2
};
/* The default curves */
static const uint16_t supported_groups_default[] = {
OSSL_TLS_GROUP_ID_x25519, /* X25519 (29) */
OSSL_TLS_GROUP_ID_secp256r1, /* secp256r1 (23) */
OSSL_TLS_GROUP_ID_x448, /* X448 (30) */
OSSL_TLS_GROUP_ID_secp521r1, /* secp521r1 (25) */
OSSL_TLS_GROUP_ID_secp384r1, /* secp384r1 (24) */
OSSL_TLS_GROUP_ID_gc256A, /* GC256A (34) */
OSSL_TLS_GROUP_ID_gc256B, /* GC256B (35) */
OSSL_TLS_GROUP_ID_gc256C, /* GC256C (36) */
OSSL_TLS_GROUP_ID_gc256D, /* GC256D (37) */
OSSL_TLS_GROUP_ID_gc512A, /* GC512A (38) */
OSSL_TLS_GROUP_ID_gc512B, /* GC512B (39) */
OSSL_TLS_GROUP_ID_gc512C, /* GC512C (40) */
OSSL_TLS_GROUP_ID_ffdhe2048, /* ffdhe2048 (0x100) */
OSSL_TLS_GROUP_ID_ffdhe3072, /* ffdhe3072 (0x101) */
OSSL_TLS_GROUP_ID_ffdhe4096, /* ffdhe4096 (0x102) */
OSSL_TLS_GROUP_ID_ffdhe6144, /* ffdhe6144 (0x103) */
OSSL_TLS_GROUP_ID_ffdhe8192, /* ffdhe8192 (0x104) */
};
static const uint16_t suiteb_curves[] = {
OSSL_TLS_GROUP_ID_secp256r1,
OSSL_TLS_GROUP_ID_secp384r1,
};
struct provider_ctx_data_st {
SSL_CTX *ctx;
OSSL_PROVIDER *provider;
};
#define TLS_GROUP_LIST_MALLOC_BLOCK_SIZE 10
static OSSL_CALLBACK add_provider_groups;
static int add_provider_groups(const OSSL_PARAM params[], void *data)
{
struct provider_ctx_data_st *pgd = data;
SSL_CTX *ctx = pgd->ctx;
OSSL_PROVIDER *provider = pgd->provider;
const OSSL_PARAM *p;
TLS_GROUP_INFO *ginf = NULL;
EVP_KEYMGMT *keymgmt;
unsigned int gid;
unsigned int is_kem = 0;
int ret = 0;
if (ctx->group_list_max_len == ctx->group_list_len) {
TLS_GROUP_INFO *tmp = NULL;
if (ctx->group_list_max_len == 0)
tmp = OPENSSL_malloc(sizeof(TLS_GROUP_INFO)
* TLS_GROUP_LIST_MALLOC_BLOCK_SIZE);
else
tmp = OPENSSL_realloc(ctx->group_list,
(ctx->group_list_max_len
+ TLS_GROUP_LIST_MALLOC_BLOCK_SIZE)
* sizeof(TLS_GROUP_INFO));
if (tmp == NULL)
return 0;
ctx->group_list = tmp;
memset(tmp + ctx->group_list_max_len,
0,
sizeof(TLS_GROUP_INFO) * TLS_GROUP_LIST_MALLOC_BLOCK_SIZE);
ctx->group_list_max_len += TLS_GROUP_LIST_MALLOC_BLOCK_SIZE;
}
ginf = &ctx->group_list[ctx->group_list_len];
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME);
if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
ginf->tlsname = OPENSSL_strdup(p->data);
if (ginf->tlsname == NULL)
goto err;
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_NAME_INTERNAL);
if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
ginf->realname = OPENSSL_strdup(p->data);
if (ginf->realname == NULL)
goto err;
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_ID);
if (p == NULL || !OSSL_PARAM_get_uint(p, &gid) || gid > UINT16_MAX) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
ginf->group_id = (uint16_t)gid;
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_ALG);
if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
ginf->algorithm = OPENSSL_strdup(p->data);
if (ginf->algorithm == NULL)
goto err;
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_SECURITY_BITS);
if (p == NULL || !OSSL_PARAM_get_uint(p, &ginf->secbits)) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_IS_KEM);
if (p != NULL && (!OSSL_PARAM_get_uint(p, &is_kem) || is_kem > 1)) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
ginf->is_kem = 1 & is_kem;
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_TLS);
if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mintls)) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_TLS);
if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxtls)) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MIN_DTLS);
if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->mindtls)) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_GROUP_MAX_DTLS);
if (p == NULL || !OSSL_PARAM_get_int(p, &ginf->maxdtls)) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
/*
* Now check that the algorithm is actually usable for our property query
* string. Regardless of the result we still return success because we have
* successfully processed this group, even though we may decide not to use
* it.
*/
ret = 1;
ERR_set_mark();
keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, ginf->algorithm, ctx->propq);
if (keymgmt != NULL) {
/*
* We have successfully fetched the algorithm - however if the provider
* doesn't match this one then we ignore it.
*
* Note: We're cheating a little here. Technically if the same algorithm
* is available from more than one provider then it is undefined which
* implementation you will get back. Theoretically this could be
* different every time...we assume here that you'll always get the
* same one back if you repeat the exact same fetch. Is this a reasonable
* assumption to make (in which case perhaps we should document this
* behaviour)?
*/
if (EVP_KEYMGMT_get0_provider(keymgmt) == provider) {
/* We have a match - so we will use this group */
ctx->group_list_len++;
ginf = NULL;
}
EVP_KEYMGMT_free(keymgmt);
}
ERR_pop_to_mark();
err:
if (ginf != NULL) {
OPENSSL_free(ginf->tlsname);
OPENSSL_free(ginf->realname);
OPENSSL_free(ginf->algorithm);
ginf->algorithm = ginf->tlsname = ginf->realname = NULL;
}
return ret;
}
static int discover_provider_groups(OSSL_PROVIDER *provider, void *vctx)
{
struct provider_ctx_data_st pgd;
pgd.ctx = vctx;
pgd.provider = provider;
return OSSL_PROVIDER_get_capabilities(provider, "TLS-GROUP",
add_provider_groups, &pgd);
}
int ssl_load_groups(SSL_CTX *ctx)
{
size_t i, j, num_deflt_grps = 0;
uint16_t tmp_supp_groups[OSSL_NELEM(supported_groups_default)];
if (!OSSL_PROVIDER_do_all(ctx->libctx, discover_provider_groups, ctx))
return 0;
for (i = 0; i < OSSL_NELEM(supported_groups_default); i++) {
for (j = 0; j < ctx->group_list_len; j++) {
if (ctx->group_list[j].group_id == supported_groups_default[i]) {
tmp_supp_groups[num_deflt_grps++] = ctx->group_list[j].group_id;
break;
}
}
}
if (num_deflt_grps == 0)
return 1;
ctx->ext.supported_groups_default
= OPENSSL_malloc(sizeof(uint16_t) * num_deflt_grps);
if (ctx->ext.supported_groups_default == NULL)
return 0;
memcpy(ctx->ext.supported_groups_default,
tmp_supp_groups,
num_deflt_grps * sizeof(tmp_supp_groups[0]));
ctx->ext.supported_groups_default_len = num_deflt_grps;
return 1;
}
#define TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE 10
static OSSL_CALLBACK add_provider_sigalgs;
static int add_provider_sigalgs(const OSSL_PARAM params[], void *data)
{
struct provider_ctx_data_st *pgd = data;
SSL_CTX *ctx = pgd->ctx;
OSSL_PROVIDER *provider = pgd->provider;
const OSSL_PARAM *p;
TLS_SIGALG_INFO *sinf = NULL;
EVP_KEYMGMT *keymgmt;
const char *keytype;
unsigned int code_point = 0;
int ret = 0;
if (ctx->sigalg_list_max_len == ctx->sigalg_list_len) {
TLS_SIGALG_INFO *tmp = NULL;
if (ctx->sigalg_list_max_len == 0)
tmp = OPENSSL_malloc(sizeof(TLS_SIGALG_INFO)
* TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE);
else
tmp = OPENSSL_realloc(ctx->sigalg_list,
(ctx->sigalg_list_max_len
+ TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE)
* sizeof(TLS_SIGALG_INFO));
if (tmp == NULL)
return 0;
ctx->sigalg_list = tmp;
memset(tmp + ctx->sigalg_list_max_len, 0,
sizeof(TLS_SIGALG_INFO) * TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE);
ctx->sigalg_list_max_len += TLS_SIGALG_LIST_MALLOC_BLOCK_SIZE;
}
sinf = &ctx->sigalg_list[ctx->sigalg_list_len];
/* First, mandatory parameters */
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_NAME);
if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
OPENSSL_free(sinf->sigalg_name);
sinf->sigalg_name = OPENSSL_strdup(p->data);
if (sinf->sigalg_name == NULL)
goto err;
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_IANA_NAME);
if (p == NULL || p->data_type != OSSL_PARAM_UTF8_STRING) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
OPENSSL_free(sinf->name);
sinf->name = OPENSSL_strdup(p->data);
if (sinf->name == NULL)
goto err;
p = OSSL_PARAM_locate_const(params,
OSSL_CAPABILITY_TLS_SIGALG_CODE_POINT);
if (p == NULL
|| !OSSL_PARAM_get_uint(p, &code_point)
|| code_point > UINT16_MAX) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
sinf->code_point = (uint16_t)code_point;
p = OSSL_PARAM_locate_const(params,
OSSL_CAPABILITY_TLS_SIGALG_SECURITY_BITS);
if (p == NULL || !OSSL_PARAM_get_uint(p, &sinf->secbits)) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
/* Now, optional parameters */
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_OID);
if (p == NULL) {
sinf->sigalg_oid = NULL;
} else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
goto err;
} else {
OPENSSL_free(sinf->sigalg_oid);
sinf->sigalg_oid = OPENSSL_strdup(p->data);
if (sinf->sigalg_oid == NULL)
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_SIG_NAME);
if (p == NULL) {
sinf->sig_name = NULL;
} else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
goto err;
} else {
OPENSSL_free(sinf->sig_name);
sinf->sig_name = OPENSSL_strdup(p->data);
if (sinf->sig_name == NULL)
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_SIG_OID);
if (p == NULL) {
sinf->sig_oid = NULL;
} else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
goto err;
} else {
OPENSSL_free(sinf->sig_oid);
sinf->sig_oid = OPENSSL_strdup(p->data);
if (sinf->sig_oid == NULL)
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_HASH_NAME);
if (p == NULL) {
sinf->hash_name = NULL;
} else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
goto err;
} else {
OPENSSL_free(sinf->hash_name);
sinf->hash_name = OPENSSL_strdup(p->data);
if (sinf->hash_name == NULL)
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_HASH_OID);
if (p == NULL) {
sinf->hash_oid = NULL;
} else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
goto err;
} else {
OPENSSL_free(sinf->hash_oid);
sinf->hash_oid = OPENSSL_strdup(p->data);
if (sinf->hash_oid == NULL)
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_KEYTYPE);
if (p == NULL) {
sinf->keytype = NULL;
} else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
goto err;
} else {
OPENSSL_free(sinf->keytype);
sinf->keytype = OPENSSL_strdup(p->data);
if (sinf->keytype == NULL)
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_KEYTYPE_OID);
if (p == NULL) {
sinf->keytype_oid = NULL;
} else if (p->data_type != OSSL_PARAM_UTF8_STRING) {
goto err;
} else {
OPENSSL_free(sinf->keytype_oid);
sinf->keytype_oid = OPENSSL_strdup(p->data);
if (sinf->keytype_oid == NULL)
goto err;
}
/* The remaining parameters below are mandatory again */
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_MIN_TLS);
if (p == NULL || !OSSL_PARAM_get_int(p, &sinf->mintls)) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
if ((sinf->mintls != 0) && (sinf->mintls != -1) &&
((sinf->mintls < TLS1_3_VERSION))) {
/* ignore this sigalg as this OpenSSL doesn't know how to handle it */
ret = 1;
goto err;
}
p = OSSL_PARAM_locate_const(params, OSSL_CAPABILITY_TLS_SIGALG_MAX_TLS);
if (p == NULL || !OSSL_PARAM_get_int(p, &sinf->maxtls)) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
if ((sinf->maxtls != 0) && (sinf->maxtls != -1) &&
((sinf->maxtls < sinf->mintls))) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
if ((sinf->maxtls != 0) && (sinf->maxtls != -1) &&
((sinf->maxtls < TLS1_3_VERSION))) {
/* ignore this sigalg as this OpenSSL doesn't know how to handle it */
ret = 1;
goto err;
}
/*
* Now check that the algorithm is actually usable for our property query
* string. Regardless of the result we still return success because we have
* successfully processed this signature, even though we may decide not to
* use it.
*/
ret = 1;
ERR_set_mark();
keytype = (sinf->keytype != NULL
? sinf->keytype
: (sinf->sig_name != NULL
? sinf->sig_name
: sinf->sigalg_name));
keymgmt = EVP_KEYMGMT_fetch(ctx->libctx, keytype, ctx->propq);
if (keymgmt != NULL) {
/*
* We have successfully fetched the algorithm - however if the provider
* doesn't match this one then we ignore it.
*
* Note: We're cheating a little here. Technically if the same algorithm
* is available from more than one provider then it is undefined which
* implementation you will get back. Theoretically this could be
* different every time...we assume here that you'll always get the
* same one back if you repeat the exact same fetch. Is this a reasonable
* assumption to make (in which case perhaps we should document this
* behaviour)?
*/
if (EVP_KEYMGMT_get0_provider(keymgmt) == provider) {
/*
* We have a match - so we could use this signature;
* Check proper object registration first, though.
* Don't care about return value as this may have been
* done within providers or previous calls to
* add_provider_sigalgs.
*/
OBJ_create(sinf->sigalg_oid, sinf->sigalg_name, NULL);
/* sanity check: Without successful registration don't use alg */
if ((OBJ_txt2nid(sinf->sigalg_name) == NID_undef) ||
(OBJ_nid2obj(OBJ_txt2nid(sinf->sigalg_name)) == NULL)) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
goto err;
}
if (sinf->sig_name != NULL)
OBJ_create(sinf->sig_oid, sinf->sig_name, NULL);
if (sinf->keytype != NULL)
OBJ_create(sinf->keytype_oid, sinf->keytype, NULL);
if (sinf->hash_name != NULL)
OBJ_create(sinf->hash_oid, sinf->hash_name, NULL);
OBJ_add_sigid(OBJ_txt2nid(sinf->sigalg_name),
(sinf->hash_name != NULL
? OBJ_txt2nid(sinf->hash_name)
: NID_undef),
OBJ_txt2nid(keytype));
ctx->sigalg_list_len++;
sinf = NULL;
}
EVP_KEYMGMT_free(keymgmt);
}
ERR_pop_to_mark();
err:
if (sinf != NULL) {
OPENSSL_free(sinf->name);
sinf->name = NULL;
OPENSSL_free(sinf->sigalg_name);
sinf->sigalg_name = NULL;
OPENSSL_free(sinf->sigalg_oid);
sinf->sigalg_oid = NULL;
OPENSSL_free(sinf->sig_name);
sinf->sig_name = NULL;
OPENSSL_free(sinf->sig_oid);
sinf->sig_oid = NULL;
OPENSSL_free(sinf->hash_name);
sinf->hash_name = NULL;
OPENSSL_free(sinf->hash_oid);
sinf->hash_oid = NULL;
OPENSSL_free(sinf->keytype);
sinf->keytype = NULL;
OPENSSL_free(sinf->keytype_oid);
sinf->keytype_oid = NULL;
}
return ret;
}
static int discover_provider_sigalgs(OSSL_PROVIDER *provider, void *vctx)
{
struct provider_ctx_data_st pgd;
pgd.ctx = vctx;
pgd.provider = provider;
OSSL_PROVIDER_get_capabilities(provider, "TLS-SIGALG",
add_provider_sigalgs, &pgd);
/*
* Always OK, even if provider doesn't support the capability:
* Reconsider testing retval when legacy sigalgs are also loaded this way.
*/
return 1;
}
int ssl_load_sigalgs(SSL_CTX *ctx)
{
size_t i;
SSL_CERT_LOOKUP lu;
if (!OSSL_PROVIDER_do_all(ctx->libctx, discover_provider_sigalgs, ctx))
return 0;
/* now populate ctx->ssl_cert_info */
if (ctx->sigalg_list_len > 0) {
ctx->ssl_cert_info = OPENSSL_zalloc(sizeof(lu) * ctx->sigalg_list_len);
if (ctx->ssl_cert_info == NULL)
return 0;
for(i = 0; i < ctx->sigalg_list_len; i++) {
ctx->ssl_cert_info[i].nid = OBJ_txt2nid(ctx->sigalg_list[i].sigalg_name);
ctx->ssl_cert_info[i].amask = SSL_aANY;
}
}
/*
* For now, leave it at this: legacy sigalgs stay in their own
* data structures until "legacy cleanup" occurs.
*/
return 1;
}
static uint16_t tls1_group_name2id(SSL_CTX *ctx, const char *name)
{
size_t i;
for (i = 0; i < ctx->group_list_len; i++) {
if (strcmp(ctx->group_list[i].tlsname, name) == 0
|| strcmp(ctx->group_list[i].realname, name) == 0)
return ctx->group_list[i].group_id;
}
return 0;
}
const TLS_GROUP_INFO *tls1_group_id_lookup(SSL_CTX *ctx, uint16_t group_id)
{
size_t i;
for (i = 0; i < ctx->group_list_len; i++) {
if (ctx->group_list[i].group_id == group_id)
return &ctx->group_list[i];
}
return NULL;
}
const char *tls1_group_id2name(SSL_CTX *ctx, uint16_t group_id)
{
const TLS_GROUP_INFO *tls_group_info = tls1_group_id_lookup(ctx, group_id);
if (tls_group_info == NULL)
return NULL;
return tls_group_info->tlsname;
}
int tls1_group_id2nid(uint16_t group_id, int include_unknown)
{
size_t i;
if (group_id == 0)
return NID_undef;
/*
* Return well known Group NIDs - for backwards compatibility. This won't
* work for groups we don't know about.
*/
for (i = 0; i < OSSL_NELEM(nid_to_group); i++)
{
if (nid_to_group[i].group_id == group_id)
return nid_to_group[i].nid;
}
if (!include_unknown)
return NID_undef;
return TLSEXT_nid_unknown | (int)group_id;
}
uint16_t tls1_nid2group_id(int nid)
{
size_t i;
/*
* Return well known Group ids - for backwards compatibility. This won't
* work for groups we don't know about.
*/
for (i = 0; i < OSSL_NELEM(nid_to_group); i++)
{
if (nid_to_group[i].nid == nid)
return nid_to_group[i].group_id;
}
return 0;
}
/*
* Set *pgroups to the supported groups list and *pgroupslen to
* the number of groups supported.
*/
void tls1_get_supported_groups(SSL_CONNECTION *s, const uint16_t **pgroups,
size_t *pgroupslen)
{
SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
/* For Suite B mode only include P-256, P-384 */
switch (tls1_suiteb(s)) {
case SSL_CERT_FLAG_SUITEB_128_LOS:
*pgroups = suiteb_curves;
*pgroupslen = OSSL_NELEM(suiteb_curves);
break;
case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
*pgroups = suiteb_curves;
*pgroupslen = 1;
break;
case SSL_CERT_FLAG_SUITEB_192_LOS:
*pgroups = suiteb_curves + 1;
*pgroupslen = 1;
break;
default:
if (s->ext.supportedgroups == NULL) {
*pgroups = sctx->ext.supported_groups_default;
*pgroupslen = sctx->ext.supported_groups_default_len;
} else {
*pgroups = s->ext.supportedgroups;
*pgroupslen = s->ext.supportedgroups_len;
}
break;
}
}
int tls_valid_group(SSL_CONNECTION *s, uint16_t group_id,
int minversion, int maxversion,
int isec, int *okfortls13)
{
const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(SSL_CONNECTION_GET_CTX(s),
group_id);
int ret;
if (okfortls13 != NULL)
*okfortls13 = 0;
if (ginfo == NULL)
return 0;
if (SSL_CONNECTION_IS_DTLS(s)) {
if (ginfo->mindtls < 0 || ginfo->maxdtls < 0)
return 0;
if (ginfo->maxdtls == 0)
ret = 1;
else
ret = DTLS_VERSION_LE(minversion, ginfo->maxdtls);
if (ginfo->mindtls > 0)
ret &= DTLS_VERSION_GE(maxversion, ginfo->mindtls);
} else {
if (ginfo->mintls < 0 || ginfo->maxtls < 0)
return 0;
if (ginfo->maxtls == 0)
ret = 1;
else
ret = (minversion <= ginfo->maxtls);
if (ginfo->mintls > 0)
ret &= (maxversion >= ginfo->mintls);
if (ret && okfortls13 != NULL && maxversion == TLS1_3_VERSION)
*okfortls13 = (ginfo->maxtls == 0)
|| (ginfo->maxtls >= TLS1_3_VERSION);
}
ret &= !isec
|| strcmp(ginfo->algorithm, "EC") == 0
|| strcmp(ginfo->algorithm, "X25519") == 0
|| strcmp(ginfo->algorithm, "X448") == 0;
return ret;
}
/* See if group is allowed by security callback */
int tls_group_allowed(SSL_CONNECTION *s, uint16_t group, int op)
{
const TLS_GROUP_INFO *ginfo = tls1_group_id_lookup(SSL_CONNECTION_GET_CTX(s),
group);
unsigned char gtmp[2];
if (ginfo == NULL)
return 0;
gtmp[0] = group >> 8;
gtmp[1] = group & 0xff;
return ssl_security(s, op, ginfo->secbits,
tls1_group_id2nid(ginfo->group_id, 0), (void *)gtmp);
}
/* Return 1 if "id" is in "list" */
static int tls1_in_list(uint16_t id, const uint16_t *list, size_t listlen)
{
size_t i;
for (i = 0; i < listlen; i++)
if (list[i] == id)
return 1;
return 0;
}
/*-
* For nmatch >= 0, return the id of the |nmatch|th shared group or 0
* if there is no match.
* For nmatch == -1, return number of matches
* For nmatch == -2, return the id of the group to use for
* a tmp key, or 0 if there is no match.
*/
uint16_t tls1_shared_group(SSL_CONNECTION *s, int nmatch)
{
const uint16_t *pref, *supp;
size_t num_pref, num_supp, i;
int k;
SSL_CTX *ctx = SSL_CONNECTION_GET_CTX(s);
/* Can't do anything on client side */
if (s->server == 0)
return 0;
if (nmatch == -2) {
if (tls1_suiteb(s)) {
/*
* For Suite B ciphersuite determines curve: we already know
* these are acceptable due to previous checks.
*/
unsigned long cid = s->s3.tmp.new_cipher->id;
if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
return OSSL_TLS_GROUP_ID_secp256r1;
if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
return OSSL_TLS_GROUP_ID_secp384r1;
/* Should never happen */
return 0;
}
/* If not Suite B just return first preference shared curve */
nmatch = 0;
}
/*
* If server preference set, our groups are the preference order
* otherwise peer decides.
*/
if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
tls1_get_supported_groups(s, &pref, &num_pref);
tls1_get_peer_groups(s, &supp, &num_supp);
} else {
tls1_get_peer_groups(s, &pref, &num_pref);
tls1_get_supported_groups(s, &supp, &num_supp);
}
for (k = 0, i = 0; i < num_pref; i++) {
uint16_t id = pref[i];
const TLS_GROUP_INFO *inf;
if (!tls1_in_list(id, supp, num_supp)
|| !tls_group_allowed(s, id, SSL_SECOP_CURVE_SHARED))
continue;
inf = tls1_group_id_lookup(ctx, id);
if (!ossl_assert(inf != NULL))
return 0;
if (SSL_CONNECTION_IS_DTLS(s)) {
if (inf->maxdtls == -1)
continue;
if ((inf->mindtls != 0 && DTLS_VERSION_LT(s->version, inf->mindtls))
|| (inf->maxdtls != 0
&& DTLS_VERSION_GT(s->version, inf->maxdtls)))
continue;
} else {
if (inf->maxtls == -1)
continue;
if ((inf->mintls != 0 && s->version < inf->mintls)
|| (inf->maxtls != 0 && s->version > inf->maxtls))
continue;
}
if (nmatch == k)
return id;
k++;
}
if (nmatch == -1)
return k;
/* Out of range (nmatch > k). */
return 0;
}
int tls1_set_groups(uint16_t **pext, size_t *pextlen,
int *groups, size_t ngroups)
{
uint16_t *glist;
size_t i;