diff options
Diffstat (limited to 'ssl/s3_srvr.c')
| -rw-r--r-- | ssl/s3_srvr.c | 158 |
1 files changed, 155 insertions, 3 deletions
diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c index 44b9c9cdac..8859540fa8 100644 --- a/ssl/s3_srvr.c +++ b/ssl/s3_srvr.c @@ -121,6 +121,32 @@ * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. * */ +/* ==================================================================== + * Copyright 2005 Nokia. All rights reserved. + * + * The portions of the attached software ("Contribution") is developed by + * Nokia Corporation and is licensed pursuant to the OpenSSL open source + * license. + * + * The Contribution, originally written by Mika Kousa and Pasi Eronen of + * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites + * support (see RFC 4279) to OpenSSL. + * + * No patent licenses or other rights except those expressly stated in + * the OpenSSL open source license shall be deemed granted or received + * expressly, by implication, estoppel, or otherwise. + * + * No assurances are provided by Nokia that the Contribution does not + * infringe the patent or other intellectual property rights of any third + * party or that the license provides you with all the necessary rights + * to make use of the Contribution. + * + * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN + * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA + * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY + * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR + * OTHERWISE. + */ #define REUSE_CIPHER_BUG #define NETSCAPE_HANG_BUG @@ -302,7 +328,9 @@ int ssl3_accept(SSL *s) case SSL3_ST_SW_CERT_A: case SSL3_ST_SW_CERT_B: /* Check if it is anon DH or anon ECDH */ - if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) + /* or normal PSK */ + if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL) + && !(s->s3->tmp.new_cipher->algorithms & SSL_kPSK)) { ret=ssl3_send_server_certificate(s); if (ret <= 0) goto end; @@ -336,6 +364,8 @@ int ssl3_accept(SSL *s) /* only send if a DH key exchange, fortezza or * RSA but we have a sign only certificate * + * PSK: may send PSK identity hints + * * For ECC ciphersuites, we send a serverKeyExchange * message only if the cipher suite is either * ECDH-anon or ECDHE. In other cases, the @@ -343,6 +373,11 @@ int ssl3_accept(SSL *s) * public key for key exchange. */ if (s->s3->tmp.use_rsa_tmp + /* PSK: send ServerKeyExchange if PSK identity + * hint if provided */ +#ifndef OPENSSL_NO_PSK + || ((l & SSL_kPSK) && s->ctx->psk_identity_hint) +#endif || (l & SSL_kECDHE) || (l & (SSL_DH|SSL_kFZA)) || ((l & SSL_kRSA) @@ -380,7 +415,10 @@ int ssl3_accept(SSL *s) * (against the specs, but s3_clnt.c accepts this for SSL 3) */ !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || /* never request cert in Kerberos ciphersuites */ - (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5)) + (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) + /* With normal PSK Certificates and + * Certificate Requests are omitted */ + || (s->s3->tmp.new_cipher->algorithms & SSL_kPSK)) { /* no cert request */ skip=1; @@ -1390,6 +1428,14 @@ int ssl3_send_server_key_exchange(SSL *s) } else #endif /* !OPENSSL_NO_ECDH */ +#ifndef OPENSSL_NO_PSK + if (type & SSL_kPSK) + { + /* reserve size for record length and PSK identity hint*/ + n+=2+strlen(s->ctx->psk_identity_hint); + } + else +#endif /* !OPENSSL_NO_PSK */ { al=SSL_AD_HANDSHAKE_FAILURE; SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); @@ -1401,7 +1447,8 @@ int ssl3_send_server_key_exchange(SSL *s) n+=2+nr[i]; } - if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) + if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL) + && !(s->s3->tmp.new_cipher->algorithms & SSL_kPSK)) { if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) == NULL) @@ -1457,6 +1504,16 @@ int ssl3_send_server_key_exchange(SSL *s) } #endif +#ifndef OPENSSL_NO_PSK + if (type & SSL_kPSK) + { + /* copy PSK identity hint */ + s2n(strlen(s->ctx->psk_identity_hint), p); + strncpy(p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint)); + p+=strlen(s->ctx->psk_identity_hint); + } +#endif + /* not anonymous */ if (pkey != NULL) { @@ -2178,6 +2235,101 @@ int ssl3_get_client_key_exchange(SSL *s) } else #endif +#ifndef OPENSSL_NO_PSK + if (l & SSL_kPSK) + { + unsigned char *t = NULL; + unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; + unsigned int pre_ms_len = 0, psk_len = 0; + int psk_err = 1; + char tmp_id[PSK_MAX_IDENTITY_LEN+1]; + + al=SSL_AD_HANDSHAKE_FAILURE; + + n2s(p,i); + if (n != i+2) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_LENGTH_MISMATCH); + goto psk_err; + } + if (i > PSK_MAX_IDENTITY_LEN) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DATA_LENGTH_TOO_LONG); + goto psk_err; + } + if (s->psk_server_callback == NULL) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_PSK_NO_SERVER_CB); + goto psk_err; + } + + /* Create guaranteed NULL-terminated identity + * string for the callback */ + memcpy(tmp_id, p, i); + memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i); + psk_len = s->psk_server_callback(s, tmp_id, + psk_or_pre_ms, sizeof(psk_or_pre_ms)); + OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1); + + if (psk_len > PSK_MAX_PSK_LEN) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto psk_err; + } + else if (psk_len == 0) + { + /* PSK related to the given identity not found */ + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_PSK_IDENTITY_NOT_FOUND); + al=SSL_AD_UNKNOWN_PSK_IDENTITY; + goto psk_err; + } + + /* create PSK pre_master_secret */ + pre_ms_len=2+psk_len+2+psk_len; + t = psk_or_pre_ms; + memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); + s2n(psk_len, t); + memset(t, 0, psk_len); + t+=psk_len; + s2n(psk_len, t); + + if (s->session->psk_identity != NULL) + OPENSSL_free(s->session->psk_identity); + s->session->psk_identity = BUF_strdup(p); + if (s->session->psk_identity == NULL) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_MALLOC_FAILURE); + goto psk_err; + } + + if (s->session->psk_identity_hint != NULL) + OPENSSL_free(s->session->psk_identity_hint); + s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); + if (s->ctx->psk_identity_hint != NULL && + s->session->psk_identity_hint == NULL) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_MALLOC_FAILURE); + goto psk_err; + } + + s->session->master_key_length= + s->method->ssl3_enc->generate_master_secret(s, + s->session->master_key, psk_or_pre_ms, pre_ms_len); + psk_err = 0; + psk_err: + OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); + if (psk_err != 0) + goto f_err; + } + else +#endif { al=SSL_AD_HANDSHAKE_FAILURE; SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |