diff options
Diffstat (limited to 'ext/openssl/ossl_ssl.c')
-rw-r--r-- | ext/openssl/ossl_ssl.c | 43 |
1 files changed, 31 insertions, 12 deletions
diff --git a/ext/openssl/ossl_ssl.c b/ext/openssl/ossl_ssl.c index 75e26a4639..6e777c9119 100644 --- a/ext/openssl/ossl_ssl.c +++ b/ext/openssl/ossl_ssl.c @@ -622,29 +622,48 @@ ssl_npn_advertise_cb(SSL *ssl, const unsigned char **out, unsigned int *outlen, } static int -ssl_npn_select_cb(SSL *s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg) +ssl_npn_select_cb_common(VALUE cb, const unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen) { - int i = 0; - VALUE sslctx_obj, cb, protocols, selected; - - sslctx_obj = (VALUE) arg; - cb = rb_iv_get(sslctx_obj, "@npn_select_cb"); - protocols = rb_ary_new(); + VALUE selected; + long len; + unsigned char l; + VALUE protocols = rb_ary_new(); /* The format is len_1|proto_1|...|len_n|proto_n\0 */ - while (in[i]) { - VALUE protocol = rb_str_new((const char *) &in[i + 1], in[i]); + while (l = *in++) { + VALUE protocol; + if (l > inlen) { + ossl_raise(eSSLError, "Invalid protocol name list"); + } + protocol = rb_str_new((const char *)in, l); rb_ary_push(protocols, protocol); - i += in[i] + 1; + in += l; + inlen -= l; } selected = rb_funcall(cb, rb_intern("call"), 1, protocols); StringValue(selected); - *out = (unsigned char *) StringValuePtr(selected); - *outlen = RSTRING_LENINT(selected); + len = RSTRING_LEN(selected); + if (len < 1 || len >= 256) { + ossl_raise(eSSLError, "Selected protocol name must have length 1..255"); + } + *out = (unsigned char *)RSTRING_PTR(selected); + *outlen = (unsigned char)len; return SSL_TLSEXT_ERR_OK; } + +static int +ssl_npn_select_cb(SSL *s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg) +{ + VALUE sslctx_obj, cb; + + sslctx_obj = (VALUE) arg; + cb = rb_iv_get(sslctx_obj, "@npn_select_cb"); + + return ssl_npn_select_cb_common(cb, (const unsigned char **)out, outlen, in, inlen); +} + #endif /* This function may serve as the entry point to support further |