diff options
Diffstat (limited to 'openssl/crypto/cms/cms_smime.c')
| -rw-r--r-- | openssl/crypto/cms/cms_smime.c | 811 |
1 files changed, 811 insertions, 0 deletions
diff --git a/openssl/crypto/cms/cms_smime.c b/openssl/crypto/cms/cms_smime.c new file mode 100644 index 000000000..f35883aa2 --- /dev/null +++ b/openssl/crypto/cms/cms_smime.c @@ -0,0 +1,811 @@ +/* crypto/cms/cms_smime.c */ +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project. + */ +/* ==================================================================== + * Copyright (c) 2008 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. + * ==================================================================== + */ + +#include "cryptlib.h" +#include <openssl/asn1t.h> +#include <openssl/x509.h> +#include <openssl/x509v3.h> +#include <openssl/err.h> +#include <openssl/cms.h> +#include "cms_lcl.h" + +static int cms_copy_content(BIO *out, BIO *in, unsigned int flags) + { + unsigned char buf[4096]; + int r = 0, i; + BIO *tmpout = NULL; + + if (out == NULL) + tmpout = BIO_new(BIO_s_null()); + else if (flags & CMS_TEXT) + { + tmpout = BIO_new(BIO_s_mem()); + BIO_set_mem_eof_return(tmpout, 0); + } + else + tmpout = out; + + if(!tmpout) + { + CMSerr(CMS_F_CMS_COPY_CONTENT,ERR_R_MALLOC_FAILURE); + goto err; + } + + /* Read all content through chain to process digest, decrypt etc */ + for (;;) + { + i=BIO_read(in,buf,sizeof(buf)); + if (i <= 0) + { + if (BIO_method_type(in) == BIO_TYPE_CIPHER) + { + if (!BIO_get_cipher_status(in)) + goto err; + } + if (i < 0) + goto err; + break; + } + + if (tmpout && (BIO_write(tmpout, buf, i) != i)) + goto err; + } + + if(flags & CMS_TEXT) + { + if(!SMIME_text(tmpout, out)) + { + CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR); + goto err; + } + } + + r = 1; + + err: + if (tmpout && (tmpout != out)) + BIO_free(tmpout); + return r; + + } + +static int check_content(CMS_ContentInfo *cms) + { + ASN1_OCTET_STRING **pos = CMS_get0_content(cms); + if (!pos || !*pos) + { + CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT); + return 0; + } + return 1; + } + +static void do_free_upto(BIO *f, BIO *upto) + { + if (upto) + { + BIO *tbio; + do + { + tbio = BIO_pop(f); + BIO_free(f); + f = tbio; + } + while (f != upto); + } + else + BIO_free_all(f); + } + +int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags) + { + BIO *cont; + int r; + if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data) + { + CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA); + return 0; + } + cont = CMS_dataInit(cms, NULL); + if (!cont) + return 0; + r = cms_copy_content(out, cont, flags); + BIO_free_all(cont); + return r; + } + +CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags) + { + CMS_ContentInfo *cms; + cms = cms_Data_create(); + if (!cms) + return NULL; + + if (CMS_final(cms, in, NULL, flags)) + return cms; + + CMS_ContentInfo_free(cms); + + return NULL; + } + +int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out, + unsigned int flags) + { + BIO *cont; + int r; + if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest) + { + CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA); + return 0; + } + + if (!dcont && !check_content(cms)) + return 0; + + cont = CMS_dataInit(cms, dcont); + if (!cont) + return 0; + r = cms_copy_content(out, cont, flags); + if (r) + r = cms_DigestedData_do_final(cms, cont, 1); + do_free_upto(cont, dcont); + return r; + } + +CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md, + unsigned int flags) + { + CMS_ContentInfo *cms; + if (!md) + md = EVP_sha1(); + cms = cms_DigestedData_create(md); + if (!cms) + return NULL; + + if(!(flags & CMS_DETACHED)) + { + flags &= ~CMS_STREAM; + CMS_set_detached(cms, 0); + } + + if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags)) + return cms; + + CMS_ContentInfo_free(cms); + return NULL; + } + +int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms, + const unsigned char *key, size_t keylen, + BIO *dcont, BIO *out, unsigned int flags) + { + BIO *cont; + int r; + if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted) + { + CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT, + CMS_R_TYPE_NOT_ENCRYPTED_DATA); + return 0; + } + + if (!dcont && !check_content(cms)) + return 0; + + if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0) + return 0; + cont = CMS_dataInit(cms, dcont); + if (!cont) + return 0; + r = cms_copy_content(out, cont, flags); + do_free_upto(cont, dcont); + return r; + } + +CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher, + const unsigned char *key, size_t keylen, + unsigned int flags) + { + CMS_ContentInfo *cms; + if (!cipher) + { + CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER); + return NULL; + } + cms = CMS_ContentInfo_new(); + if (!cms) + return NULL; + if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen)) + return NULL; + + if(!(flags & CMS_DETACHED)) + { + flags &= ~CMS_STREAM; + CMS_set_detached(cms, 0); + } + + if ((flags & (CMS_STREAM|CMS_PARTIAL)) + || CMS_final(cms, in, NULL, flags)) + return cms; + + CMS_ContentInfo_free(cms); + return NULL; + } + +static int cms_signerinfo_verify_cert(CMS_SignerInfo *si, + X509_STORE *store, + STACK_OF(X509) *certs, + STACK_OF(X509_CRL) *crls, + unsigned int flags) + { + X509_STORE_CTX ctx; + X509 *signer; + int i, j, r = 0; + CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL); + if (!X509_STORE_CTX_init(&ctx, store, signer, certs)) + { + CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, + CMS_R_STORE_INIT_ERROR); + goto err; + } + X509_STORE_CTX_set_default(&ctx, "smime_sign"); + if (crls) + X509_STORE_CTX_set0_crls(&ctx, crls); + + i = X509_verify_cert(&ctx); + if (i <= 0) + { + j = X509_STORE_CTX_get_error(&ctx); + CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, + CMS_R_CERTIFICATE_VERIFY_ERROR); + ERR_add_error_data(2, "Verify error:", + X509_verify_cert_error_string(j)); + goto err; + } + r = 1; + err: + X509_STORE_CTX_cleanup(&ctx); + return r; + + } + +int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs, + X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags) + { + CMS_SignerInfo *si; + STACK_OF(CMS_SignerInfo) *sinfos; + STACK_OF(X509) *cms_certs = NULL; + STACK_OF(X509_CRL) *crls = NULL; + X509 *signer; + int i, scount = 0, ret = 0; + BIO *cmsbio = NULL, *tmpin = NULL; + + if (!dcont && !check_content(cms)) + return 0; + + /* Attempt to find all signer certificates */ + + sinfos = CMS_get0_SignerInfos(cms); + + if (sk_CMS_SignerInfo_num(sinfos) <= 0) + { + CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS); + goto err; + } + + for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) + { + si = sk_CMS_SignerInfo_value(sinfos, i); + CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL); + if (signer) + scount++; + } + + if (scount != sk_CMS_SignerInfo_num(sinfos)) + scount += CMS_set1_signers_certs(cms, certs, flags); + + if (scount != sk_CMS_SignerInfo_num(sinfos)) + { + CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND); + goto err; + } + + /* Attempt to verify all signers certs */ + + if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) + { + cms_certs = CMS_get1_certs(cms); + if (!(flags & CMS_NOCRL)) + crls = CMS_get1_crls(cms); + for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) + { + si = sk_CMS_SignerInfo_value(sinfos, i); + if (!cms_signerinfo_verify_cert(si, store, + cms_certs, crls, flags)) + goto err; + } + } + + /* Attempt to verify all SignerInfo signed attribute signatures */ + + if (!(flags & CMS_NO_ATTR_VERIFY)) + { + for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) + { + si = sk_CMS_SignerInfo_value(sinfos, i); + if (CMS_signed_get_attr_count(si) < 0) + continue; + if (CMS_SignerInfo_verify(si) <= 0) + goto err; + } + } + + /* Performance optimization: if the content is a memory BIO then + * store its contents in a temporary read only memory BIO. This + * avoids potentially large numbers of slow copies of data which will + * occur when reading from a read write memory BIO when signatures + * are calculated. + */ + + if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) + { + char *ptr; + long len; + len = BIO_get_mem_data(dcont, &ptr); + tmpin = BIO_new_mem_buf(ptr, len); + if (tmpin == NULL) + { + CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE); + return 0; + } + } + else + tmpin = dcont; + + + cmsbio=CMS_dataInit(cms, tmpin); + if (!cmsbio) + goto err; + + if (!cms_copy_content(out, cmsbio, flags)) + goto err; + + if (!(flags & CMS_NO_CONTENT_VERIFY)) + { + for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) + { + si = sk_CMS_SignerInfo_value(sinfos, i); + if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) + { + CMSerr(CMS_F_CMS_VERIFY, + CMS_R_CONTENT_VERIFY_ERROR); + goto err; + } + } + } + + ret = 1; + + err: + + if (dcont && (tmpin == dcont)) + do_free_upto(cmsbio, dcont); + else + BIO_free_all(cmsbio); + + if (cms_certs) + sk_X509_pop_free(cms_certs, X509_free); + if (crls) + sk_X509_CRL_pop_free(crls, X509_CRL_free); + + return ret; + } + +int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms, + STACK_OF(X509) *certs, + X509_STORE *store, unsigned int flags) + { + int r; + r = CMS_verify(rcms, certs, store, NULL, NULL, flags); + if (r <= 0) + return r; + return cms_Receipt_verify(rcms, ocms); + } + +CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs, + BIO *data, unsigned int flags) + { + CMS_ContentInfo *cms; + int i; + + cms = CMS_ContentInfo_new(); + if (!cms || !CMS_SignedData_init(cms)) + goto merr; + + if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) + { + CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR); + goto err; + } + + for (i = 0; i < sk_X509_num(certs); i++) + { + X509 *x = sk_X509_value(certs, i); + if (!CMS_add1_cert(cms, x)) + goto merr; + } + + if(!(flags & CMS_DETACHED)) + { + flags &= ~CMS_STREAM; + CMS_set_detached(cms, 0); + } + + if ((flags & (CMS_STREAM|CMS_PARTIAL)) + || CMS_final(cms, data, NULL, flags)) + return cms; + else + goto err; + + merr: + CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE); + + err: + if (cms) + CMS_ContentInfo_free(cms); + return NULL; + } + +CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si, + X509 *signcert, EVP_PKEY *pkey, + STACK_OF(X509) *certs, + unsigned int flags) + { + CMS_SignerInfo *rct_si; + CMS_ContentInfo *cms = NULL; + ASN1_OCTET_STRING **pos, *os; + BIO *rct_cont = NULL; + int r = 0; + + flags &= ~CMS_STREAM; + /* Not really detached but avoids content being allocated */ + flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED; + if (!pkey || !signcert) + { + CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT); + return NULL; + } + + /* Initialize signed data */ + + cms = CMS_sign(NULL, NULL, certs, NULL, flags); + if (!cms) + goto err; + + /* Set inner content type to signed receipt */ + if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt))) + goto err; + + rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags); + if (!rct_si) + { + CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR); + goto err; + } + + os = cms_encode_Receipt(si); + + if (!os) + goto err; + + /* Set content to digest */ + rct_cont = BIO_new_mem_buf(os->data, os->length); + if (!rct_cont) + goto err; + + /* Add msgSigDigest attribute */ + + if (!cms_msgSigDigest_add1(rct_si, si)) + goto err; + + /* Finalize structure */ + if (!CMS_final(cms, rct_cont, NULL, flags)) + goto err; + + /* Set embedded content */ + pos = CMS_get0_content(cms); + *pos = os; + + r = 1; + + err: + if (rct_cont) + BIO_free(rct_cont); + if (r) + return cms; + CMS_ContentInfo_free(cms); + return NULL; + + } + +CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data, + const EVP_CIPHER *cipher, unsigned int flags) + { + CMS_ContentInfo *cms; + int i; + X509 *recip; + cms = CMS_EnvelopedData_create(cipher); + if (!cms) + goto merr; + for (i = 0; i < sk_X509_num(certs); i++) + { + recip = sk_X509_value(certs, i); + if (!CMS_add1_recipient_cert(cms, recip, flags)) + { + CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR); + goto err; + } + } + + if(!(flags & CMS_DETACHED)) + { + flags &= ~CMS_STREAM; + CMS_set_detached(cms, 0); + } + + if ((flags & (CMS_STREAM|CMS_PARTIAL)) + || CMS_final(cms, data, NULL, flags)) + return cms; + else + goto err; + + merr: + CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE); + err: + if (cms) + CMS_ContentInfo_free(cms); + return NULL; + } + +int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert) + { + STACK_OF(CMS_RecipientInfo) *ris; + CMS_RecipientInfo *ri; + int i, r; + ris = CMS_get0_RecipientInfos(cms); + for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) + { + ri = sk_CMS_RecipientInfo_value(ris, i); + if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS) + continue; + /* If we have a cert try matching RecipientInfo + * otherwise try them all. + */ + if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0)) + { + CMS_RecipientInfo_set0_pkey(ri, pk); + r = CMS_RecipientInfo_decrypt(cms, ri); + CMS_RecipientInfo_set0_pkey(ri, NULL); + if (r > 0) + return 1; + if (cert) + { + CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, + CMS_R_DECRYPT_ERROR); + return 0; + } + ERR_clear_error(); + } + } + + CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT); + return 0; + + } + +int CMS_decrypt_set1_key(CMS_ContentInfo *cms, + unsigned char *key, size_t keylen, + unsigned char *id, size_t idlen) + { + STACK_OF(CMS_RecipientInfo) *ris; + CMS_RecipientInfo *ri; + int i, r; + ris = CMS_get0_RecipientInfos(cms); + for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) + { + ri = sk_CMS_RecipientInfo_value(ris, i); + if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK) + continue; + + /* If we have an id try matching RecipientInfo + * otherwise try them all. + */ + if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) + { + CMS_RecipientInfo_set0_key(ri, key, keylen); + r = CMS_RecipientInfo_decrypt(cms, ri); + CMS_RecipientInfo_set0_key(ri, NULL, 0); + if (r > 0) + return 1; + if (id) + { + CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, + CMS_R_DECRYPT_ERROR); + return 0; + } + ERR_clear_error(); + } + } + + CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT); + return 0; + + } + +int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert, + BIO *dcont, BIO *out, + unsigned int flags) + { + int r; + BIO *cont; + if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) + { + CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA); + return 0; + } + if (!dcont && !check_content(cms)) + return 0; + if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert)) + return 0; + + cont = CMS_dataInit(cms, dcont); + if (!cont) + return 0; + r = cms_copy_content(out, cont, flags); + do_free_upto(cont, dcont); + return r; + } + +int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags) + { + BIO *cmsbio; + int ret = 0; + if (!(cmsbio = CMS_dataInit(cms, dcont))) + { + CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE); + return 0; + } + + SMIME_crlf_copy(data, cmsbio, flags); + + (void)BIO_flush(cmsbio); + + + if (!CMS_dataFinal(cms, cmsbio)) + { + CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR); + goto err; + } + + ret = 1; + + err: + do_free_upto(cmsbio, dcont); + + return ret; + + } + +#ifdef ZLIB + +int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, + unsigned int flags) + { + BIO *cont; + int r; + if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData) + { + CMSerr(CMS_F_CMS_UNCOMPRESS, + CMS_R_TYPE_NOT_COMPRESSED_DATA); + return 0; + } + + if (!dcont && !check_content(cms)) + return 0; + + cont = CMS_dataInit(cms, dcont); + if (!cont) + return 0; + r = cms_copy_content(out, cont, flags); + do_free_upto(cont, dcont); + return r; + } + +CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags) + { + CMS_ContentInfo *cms; + if (comp_nid <= 0) + comp_nid = NID_zlib_compression; + cms = cms_CompressedData_create(comp_nid); + if (!cms) + return NULL; + + if(!(flags & CMS_DETACHED)) + { + flags &= ~CMS_STREAM; + CMS_set_detached(cms, 0); + } + + if (CMS_final(cms, in, NULL, flags)) + return cms; + + CMS_ContentInfo_free(cms); + return NULL; + } + +#else + +int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, + unsigned int flags) + { + CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM); + return 0; + } + +CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags) + { + CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM); + return NULL; + } + +#endif |