diff options
author | Dr. Stephen Henson <steve@openssl.org> | 1999-12-05 00:40:59 +0000 |
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committer | Dr. Stephen Henson <steve@openssl.org> | 1999-12-05 00:40:59 +0000 |
commit | 5a9a4b299c0140ccdd5cc61fef701935a5931842 (patch) | |
tree | 40ce1ddb052cd8309ef67f338e803aafdf7694dc /crypto/pkcs7/pk7_smime.c | |
parent | bc3baeaccafe289f06c8bce1d3eeac661ebc15c4 (diff) |
Merge in my S/MIME library and utility.
Diffstat (limited to 'crypto/pkcs7/pk7_smime.c')
-rw-r--r-- | crypto/pkcs7/pk7_smime.c | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/crypto/pkcs7/pk7_smime.c b/crypto/pkcs7/pk7_smime.c new file mode 100644 index 0000000000..58bf2d7d28 --- /dev/null +++ b/crypto/pkcs7/pk7_smime.c @@ -0,0 +1,392 @@ +/* pk7_smime.c */ +/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL + * project 1999. + */ +/* ==================================================================== + * Copyright (c) 1999 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> + +PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs, + BIO *data, int flags) +{ + PKCS7 *p7; + PKCS7_SIGNER_INFO *si; + BIO *p7bio; + STACK *smcap; + int i; + + if(!X509_check_private_key(signcert, pkey)) { + PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); + return NULL; + } + + if(!(p7 = PKCS7_new())) { + PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE); + return NULL; + } + + PKCS7_set_type(p7, NID_pkcs7_signed); + + PKCS7_content_new(p7, NID_pkcs7_data); + + if (!(si = PKCS7_add_signature(p7,signcert,pkey,EVP_sha1()))) { + PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR); + return NULL; + } + + if(!(flags & PKCS7_NOCERTS)) { + PKCS7_add_certificate(p7, signcert); + if(certs) for(i = 0; i < sk_X509_num(certs); i++) + PKCS7_add_certificate(p7, sk_X509_value(certs, i)); + } + + if(!(p7bio = PKCS7_dataInit(p7, NULL))) { + PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE); + return NULL; + } + + + SMIME_crlf_copy(data, p7bio, flags); + + if(!(flags & PKCS7_NOATTR)) { + PKCS7_add_signed_attribute(si, NID_pkcs9_contentType, + V_ASN1_OBJECT, OBJ_nid2obj(NID_pkcs7_data)); + /* Add SMIMECapabilities */ + if(!(smcap = sk_new(NULL))) { + PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE); + return NULL; + } +#ifndef NO_DES + PKCS7_simple_smimecap (smcap, NID_des_ede3_cbc, -1); + PKCS7_simple_smimecap (smcap, NID_des_cbc, -1); +#endif +#ifndef NO_RC2 + PKCS7_simple_smimecap (smcap, NID_rc2_cbc, 40); + PKCS7_simple_smimecap (smcap, NID_rc2_cbc, 128); + PKCS7_simple_smimecap (smcap, NID_rc2_cbc, 64); +#endif + PKCS7_add_attrib_smimecap (si, smcap); + sk_pop_free(smcap, X509_ALGOR_free); + } + + if(flags & PKCS7_DETACHED)PKCS7_set_detached(p7, 1); + + if (!PKCS7_dataFinal(p7,p7bio)) { + PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_DATASIGN); + return NULL; + } + + BIO_free_all(p7bio); + return p7; +} + +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; + PKCS7_ISSUER_AND_SERIAL *ias; + X509_STORE_CTX cert_ctx; + char buf[4096]; + int i, j=0; + BIO *p7bio; + BIO *tmpout; + + if(OBJ_obj2nid(p7->type) != NID_pkcs7_signed) { + 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; + } + + /* 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; + } + + 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; + } + + + if(!(signers = sk_X509_new(NULL))) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE); + return 0; + } + + /* Collect all the signers together */ + + 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_VERIFY,PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND); + sk_X509_free(signers); + return 0; + } + + sk_X509_push(signers, signer); + } + + + /* Now verify the certificates */ + + if (!(flags & PKCS7_NOVERIFY)) for (i = 0; i < sk_X509_num(signers); i++) { + signer = sk_X509_value (signers, i); + if (!(flags & PKCS7_NOCHAIN)) { + X509_STORE_CTX_init(&cert_ctx, store, signer, + p7->d.sign->cert); + X509_STORE_CTX_set_purpose(&cert_ctx, + X509_PURPOSE_SMIME_SIGN); + } else X509_STORE_CTX_init (&cert_ctx, store, signer, NULL); + 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 */ + } + + p7bio=PKCS7_dataInit(p7,indata); + + if(flags & PKCS7_TEXT) { + if(!(tmpout = BIO_new(BIO_s_mem()))) { + PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE); + goto err; + } + } 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; + } + } + + sk_X509_free(signers); + if(indata) BIO_pop(p7bio); + BIO_free_all(p7bio); + + return 1; + + err: + + sk_X509_free(signers); + BIO_free(p7bio); + + return 0; +} + +/* Build a complete PKCS#7 enveloped data */ + +PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, EVP_CIPHER *cipher, + int flags) +{ + PKCS7 *p7; + BIO *p7bio = NULL; + int i; + X509 *x509; + char inbuf[4096]; + static char txthdr[] = "Content-type: text/plain\r\n\r\n"; + if(!(p7 = PKCS7_new())) { + PKCS7err(PKCS7_F_PKCS7_ENCRYPT,ERR_R_MALLOC_FAILURE); + return NULL; + } + + PKCS7_set_type(p7, NID_pkcs7_enveloped); + 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(!(p7bio = PKCS7_dataInit(p7, NULL))) { + PKCS7err(PKCS7_F_PKCS7_ENCRYPT,ERR_R_MALLOC_FAILURE); + goto err; + } + + if(flags & PKCS7_TEXT) { + if(BIO_write(p7bio, txthdr, sizeof(txthdr) - 1) < 0) { + goto err; + } + } + + for (;;) { + i = BIO_read(in, inbuf, sizeof(inbuf)); + if (i <= 0) break; + BIO_write(p7bio, inbuf, i); + } + BIO_flush(p7bio); + + if (!PKCS7_dataFinal(p7,p7bio)) { + PKCS7err(PKCS7_F_PKCS7_ENCRYPT,PKCS7_R_PKCS7_DATAFINAL_ERROR); + goto err; + } + BIO_free_all(p7bio); + + return p7; + + err: + + BIO_free(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(!PKCS7_type_is_enveloped(p7)) { + PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_WRONG_CONTENT_TYPE); + return 0; + } + if(!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); + return 0; + } + if(!(bread = BIO_push(tmpbuf, tmpmem))) { + PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE); + 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; + } +} |