Generalise OCSP I/O functions to support dowloading of other ASN1

structures using HTTP. Add wrapper function to handle CRL download.

diff --git a/CHANGES b/CHANGES
index 9c8f298d5c55912c986159f718a85ca2a80d2438..3f6afc8020233d839335ea5a2f2bf9f906fb2c07 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -4,7 +4,12 @@
 
  Changes between 1.0.x and 1.1.0  [xx XXX xxxx]
 
-  *) New functions to set lookup_crls function and to retrieve
+  *) Extend OCSP I/O functions so they can be used for simple general purpose
+     HTTP as well as OCSP. New wrapper function which can be used to download
+     CRLs using the OCSP API.
+     [Steve Henson]
+
+  *) New functions to set lookup_crls callback and to retrieve
      X509_STORE from X509_STORE_CTX.
      [Steve Henson]
 

diff --git a/crypto/ocsp/ocsp.h b/crypto/ocsp/ocsp.h
index 31e45744bac4f976629cefc4d90680b73cbb51c2..2ad7cf2d26c7c6f970c17cf7db37e51f948a3559 100644 (file)
--- a/crypto/ocsp/ocsp.h
+++ b/crypto/ocsp/ocsp.h
@@ -404,8 +404,17 @@ OCSP_CERTID *OCSP_CERTID_dup(OCSP_CERTID *id);
 OCSP_RESPONSE *OCSP_sendreq_bio(BIO *b, char *path, OCSP_REQUEST *req);
 OCSP_REQ_CTX *OCSP_sendreq_new(BIO *io, char *path, OCSP_REQUEST *req,
                                                                int maxline);
+int OCSP_REQ_CTX_nbio(OCSP_REQ_CTX *rctx);
 int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx);
+OCSP_REQ_CTX *OCSP_REQ_CTX_new(BIO *io, int maxline);
 void OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx);
+void OCSP_set_max_response_length(OCSP_REQ_CTX *rctx, unsigned long len);
+int OCSP_REQ_CTX_i2d(OCSP_REQ_CTX *rctx, const ASN1_ITEM *it, ASN1_VALUE *val);
+int OCSP_REQ_CTX_nbio_d2i(OCSP_REQ_CTX *rctx,
+                                       ASN1_VALUE **pval, const ASN1_ITEM *it);
+BIO *OCSP_REQ_CTX_get0_mem_bio(OCSP_REQ_CTX *rctx);
+int OCSP_REQ_CTX_i2d(OCSP_REQ_CTX *rctx, const ASN1_ITEM *it, ASN1_VALUE *val);
+int OCSP_REQ_CTX_http(OCSP_REQ_CTX *rctx, const char *op, const char *path);
 int OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, OCSP_REQUEST *req);
 int OCSP_REQ_CTX_add1_header(OCSP_REQ_CTX *rctx,
                const char *name, const char *value);

diff --git a/crypto/ocsp/ocsp_ht.c b/crypto/ocsp/ocsp_ht.c
index af5fc16691d432d4969126a5e64640e4a1775a14..de34a91c5398867e8c1e26547b7d2de1774be1db 100644 (file)
--- a/crypto/ocsp/ocsp_ht.c
+++ b/crypto/ocsp/ocsp_ht.c
@@ -80,9 +80,10 @@ struct ocsp_req_ctx_st {
        BIO *io;                /* BIO to perform I/O with */
        BIO *mem;               /* Memory BIO response is built into */
        unsigned long asn1_len; /* ASN1 length of response */
+       unsigned long max_resp_len; /* Maximum length of response */
        };
 
-#define OCSP_MAX_REQUEST_LENGTH        (100 * 1024)
+#define OCSP_MAX_RESP_LENGTH   (100 * 1024)
 #define OCSP_MAX_LINE_LEN      4096;
 
 /* OCSP states */
@@ -99,16 +100,44 @@ struct ocsp_req_ctx_st {
 #define OHS_ASN1_HEADER                3
 /* OCSP content octets being read */
 #define OHS_ASN1_CONTENT       4
+/* First call: ready to start I/O */
+#define OHS_ASN1_WRITE_INIT    (5 | OHS_NOREAD)
 /* Request being sent */
 #define OHS_ASN1_WRITE         (6 | OHS_NOREAD)
 /* Request being flushed */
 #define OHS_ASN1_FLUSH         (7 | OHS_NOREAD)
 /* Completed */
 #define OHS_DONE               (8 | OHS_NOREAD)
+/* Headers set, no final \r\n included */
+#define OHS_HTTP_HEADER                (9 | OHS_NOREAD)
 
 
 static int parse_http_line1(char *line);
 
+OCSP_REQ_CTX *OCSP_REQ_CTX_new(BIO *io, int maxline)
+       {
+       OCSP_REQ_CTX *rctx;
+       rctx = OPENSSL_malloc(sizeof(OCSP_REQ_CTX));
+       if (!rctx)
+               return NULL;
+       rctx->state = OHS_ERROR;
+       rctx->max_resp_len = OCSP_MAX_RESP_LENGTH;
+       rctx->mem = BIO_new(BIO_s_mem());
+       rctx->io = io;
+       rctx->asn1_len = 0;
+       if (maxline > 0)
+               rctx->iobuflen = maxline;
+       else
+               rctx->iobuflen = OCSP_MAX_LINE_LEN;
+       rctx->iobuf = OPENSSL_malloc(rctx->iobuflen);
+       if (!rctx->iobuf || !rctx->mem)
+               {
+               OCSP_REQ_CTX_free(rctx);
+               return NULL;
+               }
+       return rctx;
+       }
+
 void OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx)
        {
        if (rctx->mem)
@@ -118,20 +147,72 @@ void OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx)
        OPENSSL_free(rctx);
        }
 
-int OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, OCSP_REQUEST *req)
+BIO *OCSP_REQ_CTX_get0_mem_bio(OCSP_REQ_CTX *rctx)
+       {
+       return rctx->mem;
+       }
+
+void OCSP_set_max_response_length(OCSP_REQ_CTX *rctx, unsigned long len)
+       {
+       if (len == 0)
+               rctx->max_resp_len = OCSP_MAX_RESP_LENGTH;
+       else
+               rctx->max_resp_len = len;
+       }
+
+int OCSP_REQ_CTX_i2d(OCSP_REQ_CTX *rctx, const ASN1_ITEM *it, ASN1_VALUE *val)
        {
        static const char req_hdr[] =
-       "Content-Type: application/ocsp-request\r\n"
-       "Content-Length: %d\r\n\r\n";
-        if (BIO_printf(rctx->mem, req_hdr, i2d_OCSP_REQUEST(req, NULL)) <= 0)
+                       "Content-Type: application/ocsp-request\r\n"
+                       "Content-Length: %d\r\n\r\n";
+       int reqlen = ASN1_item_i2d(val, NULL, it);
+        if (BIO_printf(rctx->mem, req_hdr, reqlen) <= 0)
                return 0;
-        if (i2d_OCSP_REQUEST_bio(rctx->mem, req) <= 0)
+        if (ASN1_item_i2d_bio(it, rctx->mem, val) <= 0)
                return 0;
-       rctx->state = OHS_ASN1_WRITE;
-       rctx->asn1_len = BIO_get_mem_data(rctx->mem, NULL);
+       rctx->state = OHS_ASN1_WRITE_INIT;
        return 1;
        }
 
+int OCSP_REQ_CTX_nbio_d2i(OCSP_REQ_CTX *rctx,
+                                       ASN1_VALUE **pval, const ASN1_ITEM *it)
+       {
+       int rv, len;
+       const unsigned char *p;
+
+       rv = OCSP_REQ_CTX_nbio(rctx);
+       if (rv != 1)
+               return rv;
+
+       len = BIO_get_mem_data(rctx->mem, &p);
+       *pval = ASN1_item_d2i(NULL, &p, len, it);
+       if (*pval == NULL)
+               {
+               rctx->state = OHS_ERROR;
+               return 0;
+               }
+       return 1;
+       }
+
+int OCSP_REQ_CTX_http(OCSP_REQ_CTX *rctx, const char *op, const char *path)
+       {
+       static const char http_hdr[] = "%s %s HTTP/1.0\r\n";
+
+       if (!path)
+               path = "/";
+
+        if (BIO_printf(rctx->mem, http_hdr, op, path) <= 0)
+               return 0;
+       rctx->state = OHS_HTTP_HEADER;
+       return 1;
+       }
+
+int OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, OCSP_REQUEST *req)
+       {
+       return OCSP_REQ_CTX_i2d(rctx, ASN1_ITEM_rptr(OCSP_REQUEST),
+                                                       (ASN1_VALUE *)req);
+       }
+
 int OCSP_REQ_CTX_add1_header(OCSP_REQ_CTX *rctx,
                const char *name, const char *value)
        {
@@ -148,37 +229,30 @@ int OCSP_REQ_CTX_add1_header(OCSP_REQ_CTX *rctx,
                }
        if (BIO_write(rctx->mem, "\r\n", 2) != 2)
                return 0;
+       rctx->state = OHS_HTTP_HEADER;
        return 1;
        }
 
 OCSP_REQ_CTX *OCSP_sendreq_new(BIO *io, char *path, OCSP_REQUEST *req,
                                                                int maxline)
        {
-       static const char post_hdr[] = "POST %s HTTP/1.0\r\n";
 
-       OCSP_REQ_CTX *rctx;
-       rctx = OPENSSL_malloc(sizeof(OCSP_REQ_CTX));
-       rctx->state = OHS_ERROR;
-       rctx->mem = BIO_new(BIO_s_mem());
-       rctx->io = io;
-       rctx->asn1_len = 0;
-       if (maxline > 0)
-               rctx->iobuflen = maxline;
-       else
-               rctx->iobuflen = OCSP_MAX_LINE_LEN;
-       rctx->iobuf = OPENSSL_malloc(rctx->iobuflen);
-       if (!rctx->iobuf)
-               return 0;
-       if (!path)
-               path = "/";
+       OCSP_REQ_CTX *rctx = NULL;
+       rctx = OCSP_REQ_CTX_new(io, maxline);
+       if (!rctx)
+               return NULL;
 
-        if (BIO_printf(rctx->mem, post_hdr, path) <= 0)
-               return 0;
+       if (!OCSP_REQ_CTX_http(rctx, "POST", path))
+               goto err;
 
        if (req && !OCSP_REQ_CTX_set1_req(rctx, req))
-               return 0;
+               goto err;
 
        return rctx;
+       
+       err:
+       OCSP_REQ_CTX_free(rctx);
+       return NULL;
        }
 
 /* Parse the HTTP response. This will look like this:
@@ -260,7 +334,7 @@ static int parse_http_line1(char *line)
 
        }
 
-int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx)
+int OCSP_REQ_CTX_nbio(OCSP_REQ_CTX *rctx)
        {
        int i, n;
        const unsigned char *p;
@@ -284,6 +358,18 @@ int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx)
 
        switch(rctx->state)
                {
+               case OHS_HTTP_HEADER:
+               /* Last operation was adding headers: need a final \r\n */
+               if (BIO_write(rctx->mem, "\r\n", 2) != 2)
+                       {
+                       rctx->state = OHS_ERROR;
+                       return 0;
+                       }
+               rctx->state = OHS_ASN1_WRITE_INIT;
+
+               case OHS_ASN1_WRITE_INIT:
+               rctx->asn1_len = BIO_get_mem_data(rctx->mem, NULL);
+               rctx->state = OHS_ASN1_WRITE;
 
                case OHS_ASN1_WRITE:
                n = BIO_get_mem_data(rctx->mem, &p);
@@ -435,7 +521,7 @@ int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx)
                                rctx->asn1_len |= *p++;
                                }
 
-                       if (rctx->asn1_len > OCSP_MAX_REQUEST_LENGTH)
+                       if (rctx->asn1_len > rctx->max_resp_len)
                                {
                                rctx->state = OHS_ERROR;
                                return 0;
@@ -451,20 +537,12 @@ int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx)
                /* Fall thru */
                
                case OHS_ASN1_CONTENT:
-               n = BIO_get_mem_data(rctx->mem, &p);
+               n = BIO_get_mem_data(rctx->mem, NULL);
                if (n < (int)rctx->asn1_len)
                        goto next_io;
 
-
-               *presp = d2i_OCSP_RESPONSE(NULL, &p, rctx->asn1_len);
-               if (*presp)
-                       {
-                       rctx->state = OHS_DONE;
-                       return 1;
-                       }
-
-               rctx->state = OHS_ERROR;
-               return 0;
+               rctx->state = OHS_DONE;
+               return 1;
 
                break;
 
@@ -473,11 +551,14 @@ int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx)
 
                }
 
-
-
        return 0;
 
+       }
 
+int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx)
+       {
+       return OCSP_REQ_CTX_nbio_d2i(rctx,
+                       (ASN1_VALUE **)presp, ASN1_ITEM_rptr(OCSP_RESPONSE));
        }
 
 /* Blocking OCSP request handler: now a special case of non-blocking I/O */

diff --git a/crypto/x509/x509.h b/crypto/x509/x509.h
index 078ced8b4c3de9bdf8d5c666440b3ece205f1c53..3805ab1b426260521ac87eca50aec05ce31b1b57 100644 (file)
--- a/crypto/x509/x509.h
+++ b/crypto/x509/x509.h
@@ -667,6 +667,7 @@ int X509_REQ_sign(X509_REQ *x, EVP_PKEY *pkey, const EVP_MD *md);
 int X509_REQ_sign_ctx(X509_REQ *x, EVP_MD_CTX *ctx);
 int X509_CRL_sign(X509_CRL *x, EVP_PKEY *pkey, const EVP_MD *md);
 int X509_CRL_sign_ctx(X509_CRL *x, EVP_MD_CTX *ctx);
+int X509_CRL_http_nbio(OCSP_REQ_CTX *rctx, X509_CRL **pcrl);
 int NETSCAPE_SPKI_sign(NETSCAPE_SPKI *x, EVP_PKEY *pkey, const EVP_MD *md);
 
 int X509_pubkey_digest(const X509 *data,const EVP_MD *type,

diff --git a/crypto/x509/x_all.c b/crypto/x509/x_all.c
index b94aeeb873fddf4408129e2d269bf9111478a508..e62cd313949b0f6fde88e512fb8b0dd94715428f 100644 (file)
--- a/crypto/x509/x_all.c
+++ b/crypto/x509/x_all.c
@@ -63,6 +63,7 @@
 #include <openssl/asn1.h>
 #include <openssl/evp.h>
 #include <openssl/x509.h>
+#include <openssl/ocsp.h>
 #ifndef OPENSSL_NO_RSA
 #include <openssl/rsa.h>
 #endif
@@ -127,6 +128,13 @@ int X509_CRL_sign_ctx(X509_CRL *x, EVP_MD_CTX *ctx)
                x->crl->sig_alg, x->sig_alg, x->signature, x->crl, ctx);
        }
 
+int X509_CRL_http_nbio(OCSP_REQ_CTX *rctx, X509_CRL **pcrl)
+       {
+       return OCSP_REQ_CTX_nbio_d2i(rctx,
+                               (ASN1_VALUE **)pcrl, ASN1_ITEM_rptr(X509_CRL));
+       }
+
+
 int NETSCAPE_SPKI_sign(NETSCAPE_SPKI *x, EVP_PKEY *pkey, const EVP_MD *md)
        {
        return(ASN1_item_sign(ASN1_ITEM_rptr(NETSCAPE_SPKAC), x->sig_algor,NULL,