Merge commit '3c49837d05b6fad0f1212a27e81e8ffc868eedfb'

This contains portions of #90

3 files changed, 103 insertions, 2 deletions

diff --git a/doc/luaossl.pdf b/doc/luaossl.pdf
index 6a20f27..b015a6a 100644
--- a/doc/luaossl.pdf
+++ b/doc/luaossl.pdf
diff --git a/doc/luaossl.tex b/doc/luaossl.tex
index 7db7463..0675e62 100644
--- a/doc/luaossl.tex
+++ b/doc/luaossl.tex
@@ -286,8 +286,13 @@ field & type:default & description\\\hline
 
 .exp & number:65537 & RSA or Diffie-Hellman exponent \\
 
+.dhparam & string & PEM encoded string with precomputed DH parameters \\
+
 .curve & string:prime192v1 & for elliptic curve keys, the OpenSSL string identifier of the curve
 \end{ctabular}
+
+The DH parameters ``dhparam'' will be generated on the fly, ``bits'' wide. This is a slow process, and especially for larger sizes, you would precompute those; for example: ``openssl dhparam -2 -out dh-2048.pem -outform PEM 2048''. Using the field ``dhparam'' overrides the ``bits'' field.
+
 \subsubsection[\fn{pkey.interpose}]{\fn{pkey.interpose($name$, $function$)}}
 
 Add or interpose a pkey class method. Returns the previous method, if any.
@@ -688,6 +693,10 @@ Returns the integer count of the number of extensions.
 
 Signs the instance CRL using the \module{openssl.pkey} $key$.
 
+\subsubsection[\fn{crl:verify}]{\fn{crl:verify($publickey$)}}
+
+Verifies the instance CRL using a public key.
+
 \subsubsection[\fn{crl:text}]{\fn{crl:text()}}
 
 Returns a human-readable textual representation of the instance CRL.
@@ -763,6 +772,10 @@ Add or interpose a store class method. Returns the previous method, if any.
 
 Returns a PKCS \#12 binary encoded string.
 
+\subsubsection[\fn{pkcs12.parse}]{\fn{pkcs12.parse($bag$[, $passphrase$])}}
+
+Parses a PKCS\#12 bag, presented as a binary string $bag$. The second parameter $passphrase$ is the passphrase required to decrypt the PKCS\#12 bag. The function returns three items; namely the key, certificate and the CA chain, as their respective objects. If an item is absent, it will be substituted with nil.
+
 \end{Module}
 
 
diff --git a/src/openssl.c b/src/openssl.c
index fa7dd79..0ba7825 100644
--- a/src/openssl.c
+++ b/src/openssl.c
@@ -3062,6 +3062,7 @@ static int pk_new(lua_State *L) {
                 unsigned exp = 65537;
                 int curve = NID_X9_62_prime192v1;
                 const char *id;
+                const char *dhparam = NULL;
                 lua_Number n;
 
                 if (!lua_istable(L, 1))
@@ -3103,6 +3104,9 @@ static int pk_new(lua_State *L) {
                                 luaL_argerror(L, 1, lua_pushfstring(L, "%s: invalid curve", id));
                 }
 
+                /* dhparam field can contain a PEM encoded string. */
+                loadfield(L, 1, "dhparam", LUA_TSTRING, &dhparam);
+
 creat:
                 if (!(*ud = EVP_PKEY_new()))
                         return auxL_error(L, auxL_EOPENSSL, "pkey.new");
@@ -3140,9 +3144,23 @@ creat:
                 case EVP_PKEY_DH: {
                         DH *dh;
 
-                        if (!(dh = DH_generate_parameters(bits, exp, 0, 0)))
+                        /* DH Parameter Generation can take a long time, therefore we look
+                         * at the "dhparam" field, provided by the user.
+                         * The "dhparam" field takes precedence over "bits"
+                         */
+                        if (dhparam) {
+                                BIO *bio = BIO_new_mem_buf((void*)dhparam, strlen(dhparam));
+                                if (!bio)
+                                        return auxL_error(L, auxL_EOPENSSL, "pkey.new");
+
+                                dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
+                                BIO_free(bio);
+                                if (!dh)
+                                        return auxL_error(L, auxL_EOPENSSL, "pkey.new");
+                        } else if (!(dh = DH_generate_parameters(bits, exp, 0, 0)))
                                 return auxL_error(L, auxL_EOPENSSL, "pkey.new");
 
+
                         if (!DH_generate_key(dh)) {
                                 DH_free(dh);
                                 return auxL_error(L, auxL_EOPENSSL, "pkey.new");
@@ -6630,7 +6648,7 @@ static int xx_getNextUpdate(lua_State *L) {
                 updateby = timeutc(time);
 
         if (isfinite(updateby))
-                lua_pushnumber(L, 1);
+                lua_pushnumber(L, updateby);
         else
                 lua_pushnil(L);
 
@@ -6820,6 +6838,19 @@ static int xx_sign(lua_State *L) {
 } /* xx_sign() */
 
 
+static int xx_verify(lua_State *L) {
+        X509_CRL *crl = checksimple(L, 1, X509_CRL_CLASS);
+        EVP_PKEY *key = checksimple(L, 2, PKEY_CLASS);
+
+        if (!X509_CRL_verify(crl, key))
+                return auxL_error(L, auxL_EOPENSSL, "x509.crl:verify");
+
+        lua_pushboolean(L, 1);
+
+        return 1;
+} /* xx_verify() */
+
+
 static int xx_text(lua_State *L) {
         X509_CRL *crl = checksimple(L, 1, X509_CRL_CLASS);
 
@@ -6889,6 +6920,7 @@ static const auxL_Reg xx_methods[] = {
         { "getExtension",   &xx_getExtension },
         { "getExtensionCount", &xx_getExtensionCount },
         { "sign",           &xx_sign },
+        { "verify",         &xx_verify },
         { "text",           &xx_text },
         { "tostring",       &xx__tostring },
         { NULL,             NULL },
@@ -7416,6 +7448,61 @@ static int p12_interpose(lua_State *L) {
 } /* p12_interpose() */
 
 
+static int p12_parse(lua_State *L) {
+        /* parse a p12 binary string and return the parts */
+
+        EVP_PKEY *pkey;
+        X509 *cert;
+        STACK_OF(X509) *ca = NULL;
+        PKCS12 *p12;
+
+        /* gather input parameters */
+        size_t len;
+        const char *blob = luaL_checklstring(L, 1, &len);
+        const char *passphrase = luaL_optstring(L, 2, NULL);
+
+        /* prepare return values */
+        EVP_PKEY **ud_pkey = prepsimple(L, PKEY_CLASS);
+        X509 **ud_cert = prepsimple(L, X509_CERT_CLASS);
+        STACK_OF(X509) **ud_chain = prepsimple(L, X509_CHAIN_CLASS);
+        /* Note: *ud_chain must be initialised to NULL, which prepsimple does. */
+
+        /* read PKCS#12 data into OpenSSL memory buffer */
+        BIO *bio = BIO_new_mem_buf((void*)blob, len);
+        if (!bio)
+                return auxL_error(L, auxL_EOPENSSL, "pkcs12.parse");
+        p12 = d2i_PKCS12_bio(bio, NULL);
+        BIO_free(bio);
+        if (!p12)
+                return auxL_error(L, auxL_EOPENSSL, "pkcs12.parse");
+
+        /* the p12 pointer holds the data we're interested in */
+        int rc = PKCS12_parse(p12, passphrase, ud_pkey, ud_cert, ud_chain);
+        PKCS12_free(p12);
+        if (!rc)
+                auxL_error(L, auxL_EOPENSSL, "pkcs12.parse");
+
+        /* replace the return values by nil if the ud pointers are NULL */
+        if (*ud_pkey == NULL) {
+                lua_pushnil(L);
+                lua_replace(L, -4);
+        }
+
+        if (*ud_cert == NULL) {
+                lua_pushnil(L);
+                lua_replace(L, -3);
+        }
+
+        /* other certificates (a chain, STACK_OF(X509) *) */
+        if (*ud_chain == NULL) {
+                lua_pop(L, 1);
+                lua_pushnil(L);
+        }
+
+        return 3;
+} /* p12_parse() */
+
+
 static int p12__tostring(lua_State *L) {
         PKCS12 *p12 = checksimple(L, 1, PKCS12_CLASS);
         BIO *bio = getbio(L);
@@ -7459,6 +7546,7 @@ static const auxL_Reg p12_metatable[] = {
 static const auxL_Reg p12_globals[] = {
         { "new",       &p12_new },
         { "interpose", &p12_interpose },
+        { "parse",     &p12_parse },
         { NULL,        NULL },
 };