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

structures using HTTP. Add wrapper function to handle CRL download.
This commit is contained in:
Dr. Stephen Henson 2012-11-28 16:22:53 +00:00
parent 904732f68b
commit 6f9076ff37
5 changed files with 147 additions and 43 deletions
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7
CHANGES
View File

@ -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]

9
crypto/ocsp/ocsp.h
View File

@ -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);

157
crypto/ocsp/ocsp_ht.c
View File

@ -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)
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;
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 */

1
crypto/x509/x509.h
View File

@ -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,

8
crypto/x509/x_all.c
View File

@ -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,