diff options
Diffstat (limited to 'main/openssl/crypto/pkcs7/pk7_smime.c')
| -rw-r--r-- | main/openssl/crypto/pkcs7/pk7_smime.c | 587 |
1 files changed, 587 insertions, 0 deletions
diff --git a/main/openssl/crypto/pkcs7/pk7_smime.c b/main/openssl/crypto/pkcs7/pk7_smime.c new file mode 100644 index 00000000..86742d0d --- /dev/null +++ b/main/openssl/crypto/pkcs7/pk7_smime.c @@ -0,0 +1,587 @@ +/* pk7_smime.c */ +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project. + */ +/* ==================================================================== + * Copyright (c) 1999-2004 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). + * + */ + +/* Simple PKCS#7 processing functions */ + +#include <stdio.h> +#include "cryptlib.h" +#include <openssl/x509.h> +#include <openssl/x509v3.h> + +static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si); + +PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs, + BIO *data, int flags) +{ + PKCS7 *p7; + int i; + + if(!(p7 = PKCS7_new())) + { + PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE); + return NULL; + } + + if (!PKCS7_set_type(p7, NID_pkcs7_signed)) + goto err; + + if (!PKCS7_content_new(p7, NID_pkcs7_data)) + goto err; + + if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) + { + PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_ADD_SIGNER_ERROR); + goto err; + } + + if(!(flags & PKCS7_NOCERTS)) + { + for(i = 0; i < sk_X509_num(certs); i++) + { + if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i))) + goto err; + } + } + + if(flags & PKCS7_DETACHED) + PKCS7_set_detached(p7, 1); + + if (flags & (PKCS7_STREAM|PKCS7_PARTIAL)) + return p7; + + if (PKCS7_final(p7, data, flags)) + return p7; + + err: + PKCS7_free(p7); + return NULL; +} + +int PKCS7_final(PKCS7 *p7, BIO *data, int flags) + { + BIO *p7bio; + int ret = 0; + if (!(p7bio = PKCS7_dataInit(p7, NULL))) + { + PKCS7err(PKCS7_F_PKCS7_FINAL,ERR_R_MALLOC_FAILURE); + return 0; + } + + SMIME_crlf_copy(data, p7bio, flags); + + (void)BIO_flush(p7bio); + + + if (!PKCS7_dataFinal(p7,p7bio)) + { + PKCS7err(PKCS7_F_PKCS7_FINAL,PKCS7_R_PKCS7_DATASIGN); + goto err; + } + + ret = 1; + + err: + BIO_free_all(p7bio); + + return ret; + + } + +/* Check to see if a cipher exists and if so add S/MIME capabilities */ + +static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg) + { + if (EVP_get_cipherbynid(nid)) + return PKCS7_simple_smimecap(sk, nid, arg); + return 1; + } + +static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg) + { + if (EVP_get_digestbynid(nid)) + return PKCS7_simple_smimecap(sk, nid, arg); + return 1; + } + +PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert, + EVP_PKEY *pkey, const EVP_MD *md, + int flags) + { + PKCS7_SIGNER_INFO *si = NULL; + STACK_OF(X509_ALGOR) *smcap = NULL; + if(!X509_check_private_key(signcert, pkey)) + { + PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, + PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); + return NULL; + } + + if (!(si = PKCS7_add_signature(p7,signcert,pkey, md))) + { + PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, + PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR); + return NULL; + } + + if(!(flags & PKCS7_NOCERTS)) + { + if (!PKCS7_add_certificate(p7, signcert)) + goto err; + } + + if(!(flags & PKCS7_NOATTR)) + { + if (!PKCS7_add_attrib_content_type(si, NULL)) + goto err; + /* Add SMIMECapabilities */ + if(!(flags & PKCS7_NOSMIMECAP)) + { + if(!(smcap = sk_X509_ALGOR_new_null())) + { + PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, + ERR_R_MALLOC_FAILURE); + goto err; + } + if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1) + || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1) + || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1) + || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1) + || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1) + || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1) + || !add_cipher_smcap(smcap, NID_rc2_cbc, 128) + || !add_cipher_smcap(smcap, NID_rc2_cbc, 64) + || !add_cipher_smcap(smcap, NID_des_cbc, -1) + || !add_cipher_smcap(smcap, NID_rc2_cbc, 40) + || !PKCS7_add_attrib_smimecap (si, smcap)) + goto err; + sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free); + smcap = NULL; + } + if (flags & PKCS7_REUSE_DIGEST) + { + if (!pkcs7_copy_existing_digest(p7, si)) + goto err; + if (!(flags & PKCS7_PARTIAL) && + !PKCS7_SIGNER_INFO_sign(si)) + goto err; + } + } + return si; + err: + if (smcap) + sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free); + return NULL; + } + +/* Search for a digest matching SignerInfo digest type and if found + * copy across. + */ + +static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si) + { + int i; + STACK_OF(PKCS7_SIGNER_INFO) *sinfos; + PKCS7_SIGNER_INFO *sitmp; + ASN1_OCTET_STRING *osdig = NULL; + sinfos = PKCS7_get_signer_info(p7); + for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) + { + sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i); + if (si == sitmp) + break; + if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0) + continue; + if (!OBJ_cmp(si->digest_alg->algorithm, + sitmp->digest_alg->algorithm)) + { + osdig = PKCS7_digest_from_attributes(sitmp->auth_attr); + break; + } + + } + + if (osdig) + return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length); + + PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST, + PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND); + return 0; + } + +int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store, + BIO *indata, BIO *out, int flags) +{ + STACK_OF(X509) *signers; + X509 *signer; + STACK_OF(PKCS7_SIGNER_INFO) *sinfos; + PKCS7_SIGNER_INFO *si; + X509_STORE_CTX cert_ctx; + char buf[4096]; + int i, j=0, k, ret = 0; + BIO *p7bio; + BIO *tmpin, *tmpout; + + if(!p7) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_INVALID_NULL_POINTER); + return 0; + } + + if(!PKCS7_type_is_signed(p7)) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_WRONG_CONTENT_TYPE); + return 0; + } + + /* Check for no data and no content: no data to verify signature */ + if(PKCS7_get_detached(p7) && !indata) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_CONTENT); + return 0; + } +#if 0 + /* NB: this test commented out because some versions of Netscape + * illegally include zero length content when signing data. + */ + + /* Check for data and content: two sets of data */ + if(!PKCS7_get_detached(p7) && indata) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CONTENT_AND_DATA_PRESENT); + return 0; + } +#endif + + sinfos = PKCS7_get_signer_info(p7); + + if(!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_SIGNATURES_ON_DATA); + return 0; + } + + + signers = PKCS7_get0_signers(p7, certs, flags); + + if(!signers) return 0; + + /* Now verify the certificates */ + + if (!(flags & PKCS7_NOVERIFY)) for (k = 0; k < sk_X509_num(signers); k++) { + signer = sk_X509_value (signers, k); + if (!(flags & PKCS7_NOCHAIN)) { + if(!X509_STORE_CTX_init(&cert_ctx, store, signer, + p7->d.sign->cert)) + { + PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB); + sk_X509_free(signers); + return 0; + } + X509_STORE_CTX_set_default(&cert_ctx, "smime_sign"); + } else if(!X509_STORE_CTX_init (&cert_ctx, store, signer, NULL)) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB); + sk_X509_free(signers); + return 0; + } + if (!(flags & PKCS7_NOCRL)) + X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl); + i = X509_verify_cert(&cert_ctx); + if (i <= 0) j = X509_STORE_CTX_get_error(&cert_ctx); + X509_STORE_CTX_cleanup(&cert_ctx); + if (i <= 0) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CERTIFICATE_VERIFY_ERROR); + ERR_add_error_data(2, "Verify error:", + X509_verify_cert_error_string(j)); + sk_X509_free(signers); + return 0; + } + /* Check for revocation status here */ + } + + /* 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 (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) + { + char *ptr; + long len; + len = BIO_get_mem_data(indata, &ptr); + tmpin = BIO_new_mem_buf(ptr, len); + if (tmpin == NULL) + { + PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE); + return 0; + } + } + else + tmpin = indata; + + + if (!(p7bio=PKCS7_dataInit(p7,tmpin))) + goto err; + + if(flags & PKCS7_TEXT) { + if(!(tmpout = BIO_new(BIO_s_mem()))) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE); + goto err; + } + BIO_set_mem_eof_return(tmpout, 0); + } else tmpout = out; + + /* We now have to 'read' from p7bio to calculate digests etc. */ + for (;;) + { + i=BIO_read(p7bio,buf,sizeof(buf)); + if (i <= 0) break; + if (tmpout) BIO_write(tmpout, buf, i); + } + + if(flags & PKCS7_TEXT) { + if(!SMIME_text(tmpout, out)) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_SMIME_TEXT_ERROR); + BIO_free(tmpout); + goto err; + } + BIO_free(tmpout); + } + + /* Now Verify All Signatures */ + if (!(flags & PKCS7_NOSIGS)) + for (i=0; i<sk_PKCS7_SIGNER_INFO_num(sinfos); i++) + { + si=sk_PKCS7_SIGNER_INFO_value(sinfos,i); + signer = sk_X509_value (signers, i); + j=PKCS7_signatureVerify(p7bio,p7,si, signer); + if (j <= 0) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_SIGNATURE_FAILURE); + goto err; + } + } + + ret = 1; + + err: + + if (tmpin == indata) + { + if (indata) BIO_pop(p7bio); + } + BIO_free_all(p7bio); + + sk_X509_free(signers); + + return ret; +} + +STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags) +{ + STACK_OF(X509) *signers; + STACK_OF(PKCS7_SIGNER_INFO) *sinfos; + PKCS7_SIGNER_INFO *si; + PKCS7_ISSUER_AND_SERIAL *ias; + X509 *signer; + int i; + + if(!p7) { + PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_INVALID_NULL_POINTER); + return NULL; + } + + if(!PKCS7_type_is_signed(p7)) { + PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_WRONG_CONTENT_TYPE); + return NULL; + } + + /* Collect all the signers together */ + + sinfos = PKCS7_get_signer_info(p7); + + if(sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) { + PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_NO_SIGNERS); + return 0; + } + + if(!(signers = sk_X509_new_null())) { + PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,ERR_R_MALLOC_FAILURE); + return NULL; + } + + for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) + { + si = sk_PKCS7_SIGNER_INFO_value(sinfos, i); + ias = si->issuer_and_serial; + signer = NULL; + /* If any certificates passed they take priority */ + if (certs) signer = X509_find_by_issuer_and_serial (certs, + ias->issuer, ias->serial); + if (!signer && !(flags & PKCS7_NOINTERN) + && p7->d.sign->cert) signer = + X509_find_by_issuer_and_serial (p7->d.sign->cert, + ias->issuer, ias->serial); + if (!signer) { + PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND); + sk_X509_free(signers); + return 0; + } + + if (!sk_X509_push(signers, signer)) { + sk_X509_free(signers); + return NULL; + } + } + return signers; +} + + +/* Build a complete PKCS#7 enveloped data */ + +PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher, + int flags) +{ + PKCS7 *p7; + BIO *p7bio = NULL; + int i; + X509 *x509; + if(!(p7 = PKCS7_new())) { + PKCS7err(PKCS7_F_PKCS7_ENCRYPT,ERR_R_MALLOC_FAILURE); + return NULL; + } + + if (!PKCS7_set_type(p7, NID_pkcs7_enveloped)) + goto err; + if (!PKCS7_set_cipher(p7, cipher)) { + PKCS7err(PKCS7_F_PKCS7_ENCRYPT,PKCS7_R_ERROR_SETTING_CIPHER); + goto err; + } + + for(i = 0; i < sk_X509_num(certs); i++) { + x509 = sk_X509_value(certs, i); + if(!PKCS7_add_recipient(p7, x509)) { + PKCS7err(PKCS7_F_PKCS7_ENCRYPT, + PKCS7_R_ERROR_ADDING_RECIPIENT); + goto err; + } + } + + if (flags & PKCS7_STREAM) + return p7; + + if (PKCS7_final(p7, in, flags)) + return p7; + + err: + + BIO_free_all(p7bio); + PKCS7_free(p7); + return NULL; + +} + +int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags) +{ + BIO *tmpmem; + int ret, i; + char buf[4096]; + + if(!p7) { + PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_INVALID_NULL_POINTER); + return 0; + } + + if(!PKCS7_type_is_enveloped(p7)) { + PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_WRONG_CONTENT_TYPE); + return 0; + } + + if(cert && !X509_check_private_key(cert, pkey)) { + PKCS7err(PKCS7_F_PKCS7_DECRYPT, + PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); + return 0; + } + + if(!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) { + PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR); + return 0; + } + + if (flags & PKCS7_TEXT) { + BIO *tmpbuf, *bread; + /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */ + if(!(tmpbuf = BIO_new(BIO_f_buffer()))) { + PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE); + BIO_free_all(tmpmem); + return 0; + } + if(!(bread = BIO_push(tmpbuf, tmpmem))) { + PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE); + BIO_free_all(tmpbuf); + BIO_free_all(tmpmem); + return 0; + } + ret = SMIME_text(bread, data); + BIO_free_all(bread); + return ret; + } else { + for(;;) { + i = BIO_read(tmpmem, buf, sizeof(buf)); + if(i <= 0) break; + BIO_write(data, buf, i); + } + BIO_free_all(tmpmem); + return 1; + } +} |