X-Git-Url: https://git.llucax.com/software/mutt-debian.git/blobdiff_plain/44c01adf506b1087bff724dcb65b92a12b012836..5f2a574d6c8989bc7f90612704e3e5f255b5cb58:/mutt_ssl.c diff --git a/mutt_ssl.c b/mutt_ssl.c index cb1b0cc..616a068 100644 --- a/mutt_ssl.c +++ b/mutt_ssl.c @@ -64,11 +64,12 @@ static int entropy_byte_count = 0; * open up another connection to the same server in this session */ static STACK_OF(X509) *SslSessionCerts = NULL; -typedef struct _sslsockdata +typedef struct { SSL_CTX *ctx; SSL *ssl; X509 *cert; + unsigned char isopen; } sslsockdata; @@ -80,6 +81,7 @@ static int ssl_socket_write (CONNECTION* conn, const char* buf, size_t len); static int ssl_socket_open (CONNECTION * conn); static int ssl_socket_close (CONNECTION * conn); static int tls_close (CONNECTION* conn); +static void ssl_err (sslsockdata *data, int err); static int ssl_cache_trusted_cert (X509 *cert); static int ssl_check_certificate (CONNECTION *conn, sslsockdata * data); static int interactive_check_cert (X509 *cert, int idx, int len); @@ -122,6 +124,8 @@ int mutt_ssl_starttls (CONNECTION* conn) if (ssl_negotiate (conn, ssldata)) goto bail_ssl; + ssldata->isopen = 1; + /* hmm. watch out if we're starting TLS over any method other than raw. */ conn->sockdata = ssldata; conn->conn_read = ssl_socket_read; @@ -257,13 +261,28 @@ int mutt_ssl_socket_setup (CONNECTION * conn) static int ssl_socket_read (CONNECTION* conn, char* buf, size_t len) { sslsockdata *data = conn->sockdata; - return SSL_read (data->ssl, buf, len); + int rc; + + rc = SSL_read (data->ssl, buf, len); + if (rc <= 0) + { + data->isopen = 0; + ssl_err (data, rc); + } + + return rc; } static int ssl_socket_write (CONNECTION* conn, const char* buf, size_t len) { sslsockdata *data = conn->sockdata; - return SSL_write (data->ssl, buf, len); + int rc; + + rc = SSL_write (data->ssl, buf, len); + if (rc <= 0) + ssl_err (data, rc); + + return rc; } static int ssl_socket_open (CONNECTION * conn) @@ -304,6 +323,8 @@ static int ssl_socket_open (CONNECTION * conn) return -1; } + data->isopen = 1; + conn->ssf = SSL_CIPHER_get_bits (SSL_get_current_cipher (data->ssl), &maxbits); @@ -366,7 +387,8 @@ static int ssl_socket_close (CONNECTION * conn) sslsockdata *data = conn->sockdata; if (data) { - SSL_shutdown (data->ssl); + if (data->isopen) + SSL_shutdown (data->ssl); /* hold onto this for the life of mutt, in case we want to reconnect. * The purist in me wants a mutt_exit hook. */ @@ -393,6 +415,63 @@ static int tls_close (CONNECTION* conn) return rc; } +static void ssl_err (sslsockdata *data, int err) +{ + const char* errmsg; + unsigned long sslerr; + + switch (SSL_get_error (data->ssl, err)) + { + case SSL_ERROR_NONE: + return; + case SSL_ERROR_ZERO_RETURN: + errmsg = "SSL connection closed"; + data->isopen = 0; + break; + case SSL_ERROR_WANT_READ: + errmsg = "retry read"; + break; + case SSL_ERROR_WANT_WRITE: + errmsg = "retry write"; + break; + case SSL_ERROR_WANT_CONNECT: + errmsg = "retry connect"; + break; + case SSL_ERROR_WANT_ACCEPT: + errmsg = "retry accept"; + break; + case SSL_ERROR_WANT_X509_LOOKUP: + errmsg = "retry x509 lookup"; + break; + case SSL_ERROR_SYSCALL: + errmsg = "I/O error"; + data->isopen = 0; + break; + case SSL_ERROR_SSL: + sslerr = ERR_get_error (); + switch (sslerr) + { + case 0: + switch (err) + { + case 0: + errmsg = "EOF"; + break; + default: + errmsg = strerror(errno); + } + break; + default: + errmsg = ERR_error_string (sslerr, NULL); + } + break; + default: + errmsg = "unknown error"; + } + + dprint (1, (debugfile, "SSL error: %s\n", errmsg)); +} + static char *x509_get_part (char *line, const char *ndx) { static char ret[SHORT_STRING]; @@ -474,7 +553,7 @@ static int check_certificate_by_signer (X509 *peercert) if (X509_STORE_load_locations (ctx, SslCertFile, NULL)) pass++; else - dprint (2, (debugfile, "X509_STORE_load_locations_failed\n")); + dprint (2, (debugfile, "X509_STORE_load_locations failed\n")); for (i = 0; i < sk_X509_num (SslSessionCerts); i++) pass += (X509_STORE_add_cert (ctx, sk_X509_value (SslSessionCerts, i)) != 0); @@ -652,7 +731,7 @@ static int check_host (X509 *x509cert, const char *hostname, char *err, size_t e char *buf = NULL; int bufsize; /* needed to get the DNS subjectAltNames: */ - STACK *subj_alt_names; + STACK_OF(GENERAL_NAME) *subj_alt_names; int subj_alt_names_count; GENERAL_NAME *subj_alt_name; /* did we find a name matching hostname? */ @@ -681,7 +760,9 @@ static int check_host (X509 *x509cert, const char *hostname, char *err, size_t e subj_alt_name = sk_GENERAL_NAME_value(subj_alt_names, i); if (subj_alt_name->type == GEN_DNS) { - if ((match_found = hostname_match(hostname_ascii, + if (subj_alt_name->d.ia5->length >= 0 && + mutt_strlen((char *)subj_alt_name->d.ia5->data) == (size_t)subj_alt_name->d.ia5->length && + (match_found = hostname_match(hostname_ascii, (char *)(subj_alt_name->d.ia5->data)))) { break; @@ -700,9 +781,16 @@ static int check_host (X509 *x509cert, const char *hostname, char *err, size_t e goto out; } + /* first get the space requirements */ bufsize = X509_NAME_get_text_by_NID(x509_subject, NID_commonName, NULL, 0); - bufsize++; + if (bufsize == -1) + { + if (err && errlen) + strfcpy (err, _("cannot get certificate common name"), errlen); + goto out; + } + bufsize++; /* space for the terminal nul char */ buf = safe_malloc((size_t)bufsize); if (X509_NAME_get_text_by_NID(x509_subject, NID_commonName, buf, bufsize) == -1) @@ -711,7 +799,12 @@ static int check_host (X509 *x509cert, const char *hostname, char *err, size_t e strfcpy (err, _("cannot get certificate common name"), errlen); goto out; } - match_found = hostname_match(hostname_ascii, buf); + /* cast is safe since bufsize is incremented above, so bufsize-1 is always + * zero or greater. + */ + if (mutt_strlen(buf) == (size_t)bufsize - 1) { + match_found = hostname_match(hostname_ascii, buf); + } } if (!match_found) @@ -735,7 +828,7 @@ static int ssl_cache_trusted_cert (X509 *c) { dprint (1, (debugfile, "trusted: %s\n", c->name)); if (!SslSessionCerts) - SslSessionCerts = sk_new_null(); + SslSessionCerts = sk_X509_new_null(); return (sk_X509_push (SslSessionCerts, X509_dup(c))); }