crypto: Fix BIO's usage.

Fixes #1612.
Fixes #1296.

src/node_crypto.cc

@@ -1090,17 +1090,11 @@ Handle<Value> Connection::GetPeerCertificate(const Arguments& args) {
     }
     (void) BIO_reset(bio);
 
-    char buf[256];
-    bio = NULL;
-
     int index = X509_get_ext_by_NID(peer_cert, NID_subject_alt_name, -1);
     if (index >= 0) {
       X509_EXTENSION* ext;
-      BUF_MEM* mem;
       int rv;
 
-      bio = BIO_new(BIO_s_mem());
-
       ext = X509_get_ext(peer_cert, index);
       assert(ext != NULL);
 
@@ -1110,29 +1104,23 @@ Handle<Value> Connection::GetPeerCertificate(const Arguments& args) {
       BIO_get_mem_ptr(bio, &mem);
       info->Set(subjectaltname_symbol, String::New(mem->data, mem->length));
 
-      BIO_free(bio);
+      (void) BIO_reset(bio);
     }
-    (void) BIO_reset(bio);
 
     EVP_PKEY *pkey = NULL;
     RSA *rsa = NULL;
     if( NULL != (pkey = X509_get_pubkey(peer_cert))
         && NULL != (rsa = EVP_PKEY_get1_RSA(pkey)) ) {
-        bio = BIO_new(BIO_s_mem());
         BN_print(bio, rsa->n);
-        memset(buf, 0, sizeof(buf));
-        BIO_read(bio, buf, sizeof(buf) - 1);
-        info->Set(modulus_symbol, String::New(buf) );
-        BIO_free(bio);
+        BIO_get_mem_ptr(bio, &mem);
+        info->Set(modulus_symbol, String::New(mem->data, mem->length) );
+        (void) BIO_reset(bio);
 
-        bio = BIO_new(BIO_s_mem());
         BN_print(bio, rsa->e);
-        memset(buf, 0, sizeof(buf));
-        BIO_read(bio, buf, sizeof(buf) - 1);
-        info->Set(exponent_symbol, String::New(buf) );
-        BIO_free(bio);
+        BIO_get_mem_ptr(bio, &mem);
+        info->Set(exponent_symbol, String::New(mem->data, mem->length) );
+        (void) BIO_reset(bio);
     }
-    (void) BIO_reset(bio);
 
     ASN1_TIME_print(bio, X509_get_notBefore(peer_cert));
     BIO_get_mem_ptr(bio, &mem);

test/simple/test-https-foafssl.js

@@ -80,6 +80,9 @@ process.on('exit', function () {
   assert.equal(modulus, 'A6F44A9C25791431214F5C87AF9E040177A8BB89AC803F7E09BBC\
 3A5519F349CD9B9C40BE436D0AA823A94147E26C89248ADA2BE3DD4D34E8C28964694B2047D217\
 B4F1299371EA93A83C89AB9440724131E65F2B0161DE9560CDE9C13455552B2F49CF0FB00D8D77\
-532324913F6F80FF29D0A131D29DB06AFF8BE191B7920D');
+532324913F6F80FF29D0A131D29DB06AFF8BE191B7920DC2DAE1C26EA82A47847A10391EF3BF6A\
+ABB3CC40FF82100B03A4F0FF1809278E4DDFDA7DE954ED56DC7AD9A47EEBC37D771A366FC60A5B\
+CB72373BEC180649B3EFA0E9092707210B41B90032BB18BC91F2046EBDAF1191F4A4E26D71879C\
+4C7867B62FCD508E8CE66E82D128A71E915809FCF44E8DE774067F1DE5D70B9C03687');
   assert.equal(exponent, '10001');
 });