diff options
Diffstat (limited to 'crypto/pkcs7/bio_pk7.c')
| -rw-r--r-- | crypto/pkcs7/bio_pk7.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/crypto/pkcs7/bio_pk7.c b/crypto/pkcs7/bio_pk7.c new file mode 100644 index 0000000000..831a4e23b8 --- /dev/null +++ b/crypto/pkcs7/bio_pk7.c @@ -0,0 +1,200 @@ +/* bio_pk7.c */ +/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL + * project. + */ +/* ==================================================================== + * Copyright (c) 2006 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <openssl/asn1.h> +#include <openssl/pkcs7.h> +#include <openssl/bio.h> + +#include <memory.h> +#include <stdio.h> + +/* Highly experiemental PKCS#7 BIO support routines */ + +/* The usage is quite simple, initialize a PKCS7 structure, + * get a BIO from it then any data written through the BIO + * will end up translated to PKCS#7 format on the fly. + * The data is streamed out and does *not* need to be + * all held in memory at once. + * + * When the BIO is flushed the output is finalized and any + * signatures etc written out. + * + * The BIO is a 'proper' BIO and can handle non blocking I/O + * correctly. + * + * The usage is simple. The implementation is *not*... + */ + +/* BIO support data stored in the ASN1 BIO ex_arg */ + +typedef struct pkcs7_aux_st + { + /* PKCS7 structure this BIO refers to */ + PKCS7 *p7; + /* Top of the BIO chain */ + BIO *p7bio; + /* Output BIO */ + BIO *out; + /* Boundary where content is inserted */ + unsigned char **boundary; + /* DER buffer start */ + unsigned char *derbuf; + } PKCS7_SUPPORT; + +static int pkcs7_prefix(BIO *b, unsigned char **pbuf, int *plen, void *parg); +static int pkcs7_psfix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg); +static int pkcs7_suffix(BIO *b, unsigned char **pbuf, int *plen, void *parg); + +BIO *BIO_new_PKCS7(BIO *out, PKCS7 *p7) + { + PKCS7_SUPPORT *p7aux = NULL; + BIO *p7bio = NULL; + BIO *asn_bio = NULL; + unsigned char **boundary; + p7aux = OPENSSL_malloc(sizeof(PKCS7_SUPPORT)); + asn_bio = BIO_new(BIO_f_asn1()); + + /* ASN1 bio needs to be next to output BIO */ + + out = BIO_push(asn_bio, out); + + BIO_asn1_set_prefix(asn_bio, pkcs7_prefix, pkcs7_psfix_free); + BIO_asn1_set_suffix(asn_bio, pkcs7_suffix, pkcs7_psfix_free); + + /* Now initialize BIO for PKCS#7 output */ + + p7bio = PKCS7_dataInit(p7, out); + PKCS7_stream(&boundary, p7); + + p7aux->p7 = p7; + p7aux->p7bio = p7bio; + p7aux->boundary = boundary; + p7aux->out = out; + + BIO_ctrl(asn_bio, BIO_C_SET_EX_ARG, 0, p7aux); + + return p7bio; + + } + + +static int pkcs7_prefix(BIO *b, unsigned char **pbuf, int *plen, void *parg) + { + PKCS7_SUPPORT *p7aux; + unsigned char *p; + int derlen; + + if (!parg) + return 0; + + p7aux = *(PKCS7_SUPPORT **)parg; + + derlen = i2d_PKCS7_NDEF(p7aux->p7, NULL); + p = OPENSSL_malloc(derlen); + p7aux->derbuf = p; + *pbuf = p; + i2d_PKCS7_NDEF(p7aux->p7, &p); + + *plen = *p7aux->boundary - *pbuf; + + return 1; + } + +static int pkcs7_psfix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg) + { + PKCS7_SUPPORT *p7aux; + + if (!parg) + return 0; + + p7aux = *(PKCS7_SUPPORT **)parg; + + if (p7aux->derbuf) + OPENSSL_free(p7aux->derbuf); + + p7aux->derbuf = NULL; + *pbuf = NULL; + *plen = 0; + return 1; + } + +static int pkcs7_suffix(BIO *b, unsigned char **pbuf, int *plen, void *parg) + { + PKCS7_SUPPORT *p7aux; + unsigned char *p; + int derlen; + + if (!parg) + return 0; + + p7aux = *(PKCS7_SUPPORT **)parg; + + /* Finalize structures */ + PKCS7_dataFinal(p7aux->p7, p7aux->p7bio); + + derlen = i2d_PKCS7_NDEF(p7aux->p7, NULL); + p = OPENSSL_malloc(derlen); + p7aux->derbuf = p; + i2d_PKCS7_NDEF(p7aux->p7, &p); + *pbuf = *p7aux->boundary; + *plen = derlen - (*p7aux->boundary - p7aux->derbuf); + + return 1; + } + + |