#endif
};
-int tls12_get_req_sig_algs(SSL *s, unsigned char *p)
+size_t tls12_get_sig_algs(SSL *s, unsigned char *p)
{
- size_t slen = sizeof(tls12_sigalgs);
+ const unsigned char *sigs;
+ size_t sigslen;
+ sigs = s->cert->conf_sigalgs;
+
+ if (sigs)
+ sigslen = s->cert->conf_sigalgslen;
+ else
+ {
+ sigs = tls12_sigalgs;
+ sigslen = sizeof(tls12_sigalgs);
#ifdef OPENSSL_FIPS
- /* If FIPS mode don't include MD5 which is last */
- if (FIPS_mode())
- slen -= 2;
+ /* If FIPS mode don't include MD5 which is last */
+ if (FIPS_mode())
+ sigslen -= 2;
#endif
+ }
+
if (p)
- memcpy(p, tls12_sigalgs, slen);
- return (int)slen;
+ memcpy(p, sigs, sigslen);
+ return sigslen;
}
/* byte_compare is a compare function for qsort(3) that compares bytes. */
if (TLS1_get_client_version(s) >= TLS1_2_VERSION)
{
- if ((size_t)(limit - ret) < sizeof(tls12_sigalgs) + 6)
+ size_t salglen;
+ salglen = tls12_get_sig_algs(s, NULL);
+ if ((size_t)(limit - ret) < salglen + 6)
return NULL;
s2n(TLSEXT_TYPE_signature_algorithms,ret);
- s2n(sizeof(tls12_sigalgs) + 2, ret);
- s2n(sizeof(tls12_sigalgs), ret);
- memcpy(ret, tls12_sigalgs, sizeof(tls12_sigalgs));
- ret += sizeof(tls12_sigalgs);
+ s2n(salglen + 2, ret);
+ s2n(salglen, ret);
+ tls12_get_sig_algs(s, ret);
+ ret += salglen;
}
#ifdef TLSEXT_TYPE_opaque_prf_input
unsigned short len;
unsigned char *data = *p;
int renegotiate_seen = 0;
- int sigalg_seen = 0;
s->servername_done = 0;
s->tlsext_status_type = -1;
s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
#endif
+ /* Clear any signature algorithms extension received */
+ if (s->cert->peer_sigalgs)
+ {
+ OPENSSL_free(s->cert->peer_sigalgs);
+ s->cert->peer_sigalgs = NULL;
+ }
+ /* Clear any shared sigtnature algorithms */
+ if (s->cert->shared_sigalgs)
+ {
+ OPENSSL_free(s->cert->shared_sigalgs);
+ s->cert->shared_sigalgs = NULL;
+ }
if (data >= (d+n-2))
goto ri_check;
else if (type == TLSEXT_TYPE_signature_algorithms)
{
int dsize;
- if (sigalg_seen || size < 2)
+ if (s->cert->peer_sigalgs || size < 2)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
- sigalg_seen = 1;
n2s(data,dsize);
size -= 2;
- if (dsize != size || dsize & 1)
+ if (dsize != size || dsize & 1 || !dsize)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
*al = SSL_AD_DECODE_ERROR;
return 0;
}
+ /* If sigalgs received and no shared algorithms fatal
+ * error.
+ */
+ if (s->cert->peer_sigalgs && !s->cert->shared_sigalgs)
+ {
+ SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
+ SSL_R_NO_SHARED_SIGATURE_ALGORITHMS);
+ *al = SSL_AD_ILLEGAL_PARAMETER;
+ return 0;
+ }
}
else if (type == TLSEXT_TYPE_status_request &&
s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
return 0;
}
+ /* If no signature algorithms extension set default values */
+ if (!s->cert->peer_sigalgs)
+ ssl_cert_set_default_md(s->cert);
return 1;
}
}
}
+static int tls12_get_pkey_idx(unsigned char sig_alg)
+ {
+ switch(sig_alg)
+ {
+#ifndef OPENSSL_NO_RSA
+ case TLSEXT_signature_rsa:
+ return SSL_PKEY_RSA_SIGN;
+#endif
+#ifndef OPENSSL_NO_DSA
+ case TLSEXT_signature_dsa:
+ return SSL_PKEY_DSA_SIGN;
+#endif
+#ifndef OPENSSL_NO_ECDSA
+ case TLSEXT_signature_ecdsa:
+ return SSL_PKEY_ECC;
+#endif
+ }
+ return -1;
+ }
+
+/* Convert TLS 1.2 signature algorithm extension values into NIDs */
+static void tls1_lookup_sigalg(int *phash_nid, int *psign_nid,
+ int *psignhash_nid, const unsigned char *data)
+ {
+ int sign_nid, hash_nid;
+ if (!phash_nid && !psign_nid && !psignhash_nid)
+ return;
+ if (phash_nid || psignhash_nid)
+ {
+ hash_nid = tls12_find_nid(data[0], tls12_md,
+ sizeof(tls12_md)/sizeof(tls12_lookup));
+ if (phash_nid)
+ *phash_nid = hash_nid;
+ }
+ if (psign_nid || psignhash_nid)
+ {
+ sign_nid = tls12_find_nid(data[1], tls12_sig,
+ sizeof(tls12_sig)/sizeof(tls12_lookup));
+ if (psign_nid)
+ *psign_nid = sign_nid;
+ }
+ if (psignhash_nid)
+ {
+ if (sign_nid && hash_nid)
+ OBJ_find_sigid_by_algs(psignhash_nid,
+ hash_nid, sign_nid);
+ else
+ *psignhash_nid = NID_undef;
+ }
+ }
+/* Given preference and allowed sigalgs set shared sigalgs */
+static int tls12_do_shared_sigalgs(TLS_SIGALGS *shsig,
+ const unsigned char *pref, size_t preflen,
+ const unsigned char *allow, size_t allowlen)
+ {
+ const unsigned char *ptmp, *atmp;
+ size_t i, j, nmatch = 0;
+ for (i = 0, ptmp = pref; i < preflen; i+=2, ptmp+=2)
+ {
+ /* Skip disabled hashes or signature algorithms */
+ if (tls12_get_hash(ptmp[0]) == NULL)
+ continue;
+ if (tls12_get_pkey_idx(ptmp[1]) == -1)
+ continue;
+ for (j = 0, atmp = allow; j < allowlen; j+=2, atmp+=2)
+ {
+ if (ptmp[0] == atmp[0] && ptmp[1] == atmp[1])
+ {
+ nmatch++;
+ if (shsig)
+ {
+ shsig->rhash = ptmp[0];
+ shsig->rsign = ptmp[1];
+ tls1_lookup_sigalg(&shsig->hash_nid,
+ &shsig->sign_nid,
+ &shsig->signandhash_nid,
+ ptmp);
+ shsig++;
+ }
+ break;
+ }
+ }
+ }
+ return nmatch;
+ }
+
+/* Set shared signature algorithms for SSL structures */
+static int tls1_set_shared_sigalgs(SSL *s)
+ {
+ const unsigned char *pref, *allow, *conf;
+ size_t preflen, allowlen, conflen;
+ size_t nmatch;
+ TLS_SIGALGS *salgs = NULL;
+ CERT *c = s->cert;
+ conf = c->conf_sigalgs;
+ if (conf)
+ conflen = c->conf_sigalgslen;
+ else
+ {
+ conf = tls12_sigalgs;
+ conflen = sizeof(tls12_sigalgs);
+#ifdef OPENSSL_FIPS
+ if (FIPS_mode())
+ conflen -= 2;
+#endif
+ }
+ if(s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
+ {
+ pref = conf;
+ preflen = conflen;
+ allow = c->peer_sigalgs;
+ allowlen = c->peer_sigalgslen;
+ }
+ else
+ {
+ allow = conf;
+ allowlen = conflen;
+ pref = c->peer_sigalgs;
+ preflen = c->peer_sigalgslen;
+ }
+ nmatch = tls12_do_shared_sigalgs(NULL, pref, preflen, allow, allowlen);
+ if (!nmatch)
+ return 1;
+ salgs = OPENSSL_malloc(nmatch * sizeof(TLS_SIGALGS));
+ if (!salgs)
+ return 0;
+ nmatch = tls12_do_shared_sigalgs(salgs, pref, preflen, allow, allowlen);
+ c->shared_sigalgs = salgs;
+ c->shared_sigalgslen = nmatch;
+ return 1;
+ }
+
+
/* Set preferred digest for each key type */
int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
{
- int i, idx;
+ int idx;
+ size_t i;
const EVP_MD *md;
CERT *c = s->cert;
TLS_SIGALGS *sigptr;
c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL;
c->pkeys[SSL_PKEY_ECC].digest = NULL;
- if (c->sigalgs)
- OPENSSL_free(c->sigalgs);
- c->sigalgs = OPENSSL_malloc((dsize/2) * sizeof(TLS_SIGALGS));
- if (!c->sigalgs)
+ c->peer_sigalgs = OPENSSL_malloc(dsize);
+ if (!c->peer_sigalgs)
return 0;
- c->sigalgslen = dsize/2;
+ c->peer_sigalgslen = dsize;
+ memcpy(c->peer_sigalgs, data, dsize);
- for (i = 0, sigptr = c->sigalgs; i < dsize; i += 2, sigptr++)
- {
- sigptr->rhash = data[i];
- sigptr->rsign = data[i + 1];
- sigptr->hash_nid = tls12_find_nid(sigptr->rhash, tls12_md,
- sizeof(tls12_md)/sizeof(tls12_lookup));
- sigptr->sign_nid = tls12_find_nid(sigptr->rsign, tls12_sig,
- sizeof(tls12_sig)/sizeof(tls12_lookup));
- if (!OBJ_find_sigid_by_algs(&sigptr->signandhash_nid,
- sigptr->hash_nid,
- sigptr->sign_nid))
- sigptr->signandhash_nid = NID_undef;
- switch(sigptr->rsign)
- {
-#ifndef OPENSSL_NO_RSA
- case TLSEXT_signature_rsa:
- idx = SSL_PKEY_RSA_SIGN;
- break;
-#endif
-#ifndef OPENSSL_NO_DSA
- case TLSEXT_signature_dsa:
- idx = SSL_PKEY_DSA_SIGN;
- break;
-#endif
-#ifndef OPENSSL_NO_ECDSA
- case TLSEXT_signature_ecdsa:
- idx = SSL_PKEY_ECC;
- break;
-#endif
- default:
- continue;
- }
+ tls1_set_shared_sigalgs(s);
- if (c->pkeys[idx].digest == NULL)
+ for (i = 0, sigptr = c->shared_sigalgs;
+ i < c->shared_sigalgslen; i++, sigptr++)
+ {
+ idx = tls12_get_pkey_idx(sigptr->rsign);
+ if (idx > 0 && c->pkeys[idx].digest == NULL)
{
md = tls12_get_hash(sigptr->rhash);
- if (md)
- {
- c->pkeys[idx].digest = md;
- if (idx == SSL_PKEY_RSA_SIGN)
- c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
- }
+ c->pkeys[idx].digest = md;
+ if (idx == SSL_PKEY_RSA_SIGN)
+ c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
}
}
-
-
/* Set any remaining keys to default values. NOTE: if alg is not
* supported it stays as NULL.
*/
#ifndef OPENSSL_NO_DSA
if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
- c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_dss1();
+ c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
#endif
#ifndef OPENSSL_NO_RSA
if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest)
#endif
#ifndef OPENSSL_NO_ECDSA
if (!c->pkeys[SSL_PKEY_ECC].digest)
- c->pkeys[SSL_PKEY_ECC].digest = EVP_ecdsa();
+ c->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
#endif
return 1;
}
-#endif
int SSL_get_sigalgs(SSL *s, int idx,
- int *psign, int *phash, int *psignandhash,
+ int *psign, int *phash, int *psignhash,
unsigned char *rsig, unsigned char *rhash)
{
- if (s->cert->sigalgs == NULL)
+ const unsigned char *psig = s->cert->peer_sigalgs;
+ if (psig == NULL)
return 0;
if (idx >= 0)
{
- TLS_SIGALGS *psig;
- if (idx >= (int)s->cert->sigalgslen)
+ idx <<= 1;
+ if (idx >= (int)s->cert->peer_sigalgslen)
return 0;
- psig = s->cert->sigalgs + idx;
- if (psign)
- *psign = psig->sign_nid;
- if (phash)
- *phash = psig->hash_nid;
- if (psignandhash)
- *psignandhash = psig->signandhash_nid;
- if (rsig)
- *rsig = psig->rsign;
+ psig += idx;
if (rhash)
- *rhash = psig->rhash;
+ *rhash = psig[0];
+ if (rsig)
+ *rsig = psig[1];
+ tls1_lookup_sigalg(phash, psign, psignhash, psig);
}
- return s->cert->sigalgslen;
+ return s->cert->peer_sigalgslen / 2;
+ }
+
+int SSL_get_shared_sigalgs(SSL *s, int idx,
+ int *psign, int *phash, int *psignhash,
+ unsigned char *rsig, unsigned char *rhash)
+ {
+ TLS_SIGALGS *shsigalgs = s->cert->shared_sigalgs;
+ if (!shsigalgs || idx >= (int)s->cert->shared_sigalgslen)
+ return 0;
+ shsigalgs += idx;
+ if (phash)
+ *phash = shsigalgs->hash_nid;
+ if (psign)
+ *psign = shsigalgs->sign_nid;
+ if (psignhash)
+ *psignhash = shsigalgs->signandhash_nid;
+ if (rsig)
+ *rsig = shsigalgs->rsign;
+ if (rhash)
+ *rhash = shsigalgs->rhash;
+ return s->cert->shared_sigalgslen;
}
return ret;
}
#endif
+
+#define MAX_SIGALGLEN (TLSEXT_hash_num * TLSEXT_signature_num * 2)
+
+typedef struct
+ {
+ size_t sigalgcnt;
+ int sigalgs[MAX_SIGALGLEN];
+ } sig_cb_st;
+
+static int sig_cb(const char *elem, int len, void *arg)
+ {
+ sig_cb_st *sarg = arg;
+ size_t i;
+ char etmp[20], *p;
+ int sig_alg, hash_alg;
+ if (sarg->sigalgcnt == MAX_SIGALGLEN)
+ return 0;
+ if (len > (int)(sizeof(etmp) - 1))
+ return 0;
+ memcpy(etmp, elem, len);
+ etmp[len] = 0;
+ p = strchr(etmp, '+');
+ if (!p)
+ return 0;
+ *p = 0;
+ p++;
+ if (!*p)
+ return 0;
+
+ if (!strcmp(etmp, "RSA"))
+ sig_alg = EVP_PKEY_RSA;
+ else if (!strcmp(etmp, "DSA"))
+ sig_alg = EVP_PKEY_DSA;
+ else if (!strcmp(etmp, "ECDSA"))
+ sig_alg = EVP_PKEY_EC;
+ else return 0;
+
+ hash_alg = OBJ_sn2nid(p);
+ if (hash_alg == NID_undef)
+ hash_alg = OBJ_ln2nid(p);
+ if (hash_alg == NID_undef)
+ return 0;
+
+ for (i = 0; i < sarg->sigalgcnt; i+=2)
+ {
+ if (sarg->sigalgs[i] == sig_alg
+ && sarg->sigalgs[i + 1] == hash_alg)
+ return 0;
+ }
+ sarg->sigalgs[sarg->sigalgcnt++] = hash_alg;
+ sarg->sigalgs[sarg->sigalgcnt++] = sig_alg;
+ return 1;
+ }
+
+/* Set suppored signature algorithms based on a colon separated list
+ * of the form sig+hash e.g. RSA+SHA512:DSA+SHA512 */
+int tls1_set_sigalgs_list(CERT *c, const char *str)
+ {
+ sig_cb_st sig;
+ sig.sigalgcnt = 0;
+ if (!CONF_parse_list(str, ':', 1, sig_cb, &sig))
+ return 0;
+ return tls1_set_sigalgs(c, sig.sigalgs, sig.sigalgcnt);
+ }
+
+int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen)
+ {
+ unsigned char *sigalgs, *sptr;
+ int rhash, rsign;
+ size_t i;
+ if (salglen & 1)
+ return 0;
+ sigalgs = OPENSSL_malloc(salglen);
+ if (sigalgs == NULL)
+ return 0;
+ for (i = 0, sptr = sigalgs; i < salglen; i+=2)
+ {
+ rhash = tls12_find_id(*psig_nids++, tls12_md,
+ sizeof(tls12_md)/sizeof(tls12_lookup));
+ rsign = tls12_find_id(*psig_nids++, tls12_sig,
+ sizeof(tls12_sig)/sizeof(tls12_lookup));
+
+ if (rhash == -1 || rsign == -1)
+ goto err;
+ *sptr++ = rhash;
+ *sptr++ = rsign;
+ }
+
+ if (c->conf_sigalgs)
+ OPENSSL_free(c->conf_sigalgs);
+
+ c->conf_sigalgs = sigalgs;
+ c->conf_sigalgslen = salglen;
+ return 1;
+
+ err:
+ OPENSSL_free(sigalgs);
+ return 0;
+ }
+
+#endif
projects / openssl.git / blobdiff