diff options
Diffstat (limited to 'openssl-1.1.0h/apps/smime.c')
| -rw-r--r-- | openssl-1.1.0h/apps/smime.c | 656 |
1 files changed, 656 insertions, 0 deletions
diff --git a/openssl-1.1.0h/apps/smime.c b/openssl-1.1.0h/apps/smime.c new file mode 100644 index 0000000..e18d7de --- /dev/null +++ b/openssl-1.1.0h/apps/smime.c @@ -0,0 +1,656 @@ +/* + * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +/* S/MIME utility function */ + +#include <stdio.h> +#include <string.h> +#include "apps.h" +#include <openssl/crypto.h> +#include <openssl/pem.h> +#include <openssl/err.h> +#include <openssl/x509_vfy.h> +#include <openssl/x509v3.h> + +static int save_certs(char *signerfile, STACK_OF(X509) *signers); +static int smime_cb(int ok, X509_STORE_CTX *ctx); + +#define SMIME_OP 0x10 +#define SMIME_IP 0x20 +#define SMIME_SIGNERS 0x40 +#define SMIME_ENCRYPT (1 | SMIME_OP) +#define SMIME_DECRYPT (2 | SMIME_IP) +#define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS) +#define SMIME_VERIFY (4 | SMIME_IP) +#define SMIME_PK7OUT (5 | SMIME_IP | SMIME_OP) +#define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS) + +typedef enum OPTION_choice { + OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, + OPT_ENCRYPT, OPT_DECRYPT, OPT_SIGN, OPT_RESIGN, OPT_VERIFY, + OPT_PK7OUT, OPT_TEXT, OPT_NOINTERN, OPT_NOVERIFY, OPT_NOCHAIN, + OPT_NOCERTS, OPT_NOATTR, OPT_NODETACH, OPT_NOSMIMECAP, + OPT_BINARY, OPT_NOSIGS, OPT_STREAM, OPT_INDEF, OPT_NOINDEF, + OPT_CRLFEOL, OPT_RAND, OPT_ENGINE, OPT_PASSIN, + OPT_TO, OPT_FROM, OPT_SUBJECT, OPT_SIGNER, OPT_RECIP, OPT_MD, + OPT_CIPHER, OPT_INKEY, OPT_KEYFORM, OPT_CERTFILE, OPT_CAFILE, + OPT_V_ENUM, + OPT_CAPATH, OPT_NOCAFILE, OPT_NOCAPATH, OPT_IN, OPT_INFORM, OPT_OUT, + OPT_OUTFORM, OPT_CONTENT +} OPTION_CHOICE; + +OPTIONS smime_options[] = { + {OPT_HELP_STR, 1, '-', "Usage: %s [options] cert.pem...\n"}, + {OPT_HELP_STR, 1, '-', + " cert.pem... recipient certs for encryption\n"}, + {OPT_HELP_STR, 1, '-', "Valid options are:\n"}, + {"help", OPT_HELP, '-', "Display this summary"}, + {"encrypt", OPT_ENCRYPT, '-', "Encrypt message"}, + {"decrypt", OPT_DECRYPT, '-', "Decrypt encrypted message"}, + {"sign", OPT_SIGN, '-', "Sign message"}, + {"verify", OPT_VERIFY, '-', "Verify signed message"}, + {"pk7out", OPT_PK7OUT, '-', "Output PKCS#7 structure"}, + {"nointern", OPT_NOINTERN, '-', + "Don't search certificates in message for signer"}, + {"nosigs", OPT_NOSIGS, '-', "Don't verify message signature"}, + {"noverify", OPT_NOVERIFY, '-', "Don't verify signers certificate"}, + {"nocerts", OPT_NOCERTS, '-', + "Don't include signers certificate when signing"}, + {"nodetach", OPT_NODETACH, '-', "Use opaque signing"}, + {"noattr", OPT_NOATTR, '-', "Don't include any signed attributes"}, + {"binary", OPT_BINARY, '-', "Don't translate message to text"}, + {"certfile", OPT_CERTFILE, '<', "Other certificates file"}, + {"signer", OPT_SIGNER, 's', "Signer certificate file"}, + {"recip", OPT_RECIP, '<', "Recipient certificate file for decryption"}, + {"in", OPT_IN, '<', "Input file"}, + {"inform", OPT_INFORM, 'c', "Input format SMIME (default), PEM or DER"}, + {"inkey", OPT_INKEY, 's', + "Input private key (if not signer or recipient)"}, + {"keyform", OPT_KEYFORM, 'f', "Input private key format (PEM or ENGINE)"}, + {"out", OPT_OUT, '>', "Output file"}, + {"outform", OPT_OUTFORM, 'c', + "Output format SMIME (default), PEM or DER"}, + {"content", OPT_CONTENT, '<', + "Supply or override content for detached signature"}, + {"to", OPT_TO, 's', "To address"}, + {"from", OPT_FROM, 's', "From address"}, + {"subject", OPT_SUBJECT, 's', "Subject"}, + {"text", OPT_TEXT, '-', "Include or delete text MIME headers"}, + {"CApath", OPT_CAPATH, '/', "Trusted certificates directory"}, + {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"}, + {"no-CAfile", OPT_NOCAFILE, '-', + "Do not load the default certificates file"}, + {"no-CApath", OPT_NOCAPATH, '-', + "Do not load certificates from the default certificates directory"}, + {"resign", OPT_RESIGN, '-', "Resign a signed message"}, + {"nochain", OPT_NOCHAIN, '-', + "set PKCS7_NOCHAIN so certificates contained in the message are not used as untrusted CAs" }, + {"nosmimecap", OPT_NOSMIMECAP, '-', "Omit the SMIMECapabilities attribute"}, + {"stream", OPT_STREAM, '-', "Enable CMS streaming" }, + {"indef", OPT_INDEF, '-', "Same as -stream" }, + {"noindef", OPT_NOINDEF, '-', "Disable CMS streaming"}, + {"crlfeol", OPT_CRLFEOL, '-', "Use CRLF as EOL termination instead of CR only"}, + {"rand", OPT_RAND, 's', + "Load the file(s) into the random number generator"}, + {"passin", OPT_PASSIN, 's', "Input file pass phrase source"}, + {"md", OPT_MD, 's', "Digest algorithm to use when signing or resigning"}, + {"", OPT_CIPHER, '-', "Any supported cipher"}, + OPT_V_OPTIONS, +#ifndef OPENSSL_NO_ENGINE + {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, +#endif + {NULL} +}; + +int smime_main(int argc, char **argv) +{ + BIO *in = NULL, *out = NULL, *indata = NULL; + EVP_PKEY *key = NULL; + PKCS7 *p7 = NULL; + STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL; + STACK_OF(X509) *encerts = NULL, *other = NULL; + X509 *cert = NULL, *recip = NULL, *signer = NULL; + X509_STORE *store = NULL; + X509_VERIFY_PARAM *vpm = NULL; + const EVP_CIPHER *cipher = NULL; + const EVP_MD *sign_md = NULL; + const char *CAfile = NULL, *CApath = NULL, *prog = NULL; + char *certfile = NULL, *keyfile = NULL, *contfile = NULL, *inrand = NULL; + char *infile = NULL, *outfile = NULL, *signerfile = NULL, *recipfile = + NULL; + char *passinarg = NULL, *passin = NULL, *to = NULL, *from = + NULL, *subject = NULL; + OPTION_CHOICE o; + int noCApath = 0, noCAfile = 0; + int flags = PKCS7_DETACHED, operation = 0, ret = 0, need_rand = 0, indef = + 0; + int informat = FORMAT_SMIME, outformat = FORMAT_SMIME, keyform = + FORMAT_PEM; + int vpmtouched = 0, rv = 0; + ENGINE *e = NULL; + const char *mime_eol = "\n"; + + if ((vpm = X509_VERIFY_PARAM_new()) == NULL) + return 1; + + prog = opt_init(argc, argv, smime_options); + while ((o = opt_next()) != OPT_EOF) { + switch (o) { + case OPT_EOF: + case OPT_ERR: + opthelp: + BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); + goto end; + case OPT_HELP: + opt_help(smime_options); + ret = 0; + goto end; + case OPT_INFORM: + if (!opt_format(opt_arg(), OPT_FMT_PDS, &informat)) + goto opthelp; + break; + case OPT_IN: + infile = opt_arg(); + break; + case OPT_OUTFORM: + if (!opt_format(opt_arg(), OPT_FMT_PDS, &outformat)) + goto opthelp; + break; + case OPT_OUT: + outfile = opt_arg(); + break; + case OPT_ENCRYPT: + operation = SMIME_ENCRYPT; + break; + case OPT_DECRYPT: + operation = SMIME_DECRYPT; + break; + case OPT_SIGN: + operation = SMIME_SIGN; + break; + case OPT_RESIGN: + operation = SMIME_RESIGN; + break; + case OPT_VERIFY: + operation = SMIME_VERIFY; + break; + case OPT_PK7OUT: + operation = SMIME_PK7OUT; + break; + case OPT_TEXT: + flags |= PKCS7_TEXT; + break; + case OPT_NOINTERN: + flags |= PKCS7_NOINTERN; + break; + case OPT_NOVERIFY: + flags |= PKCS7_NOVERIFY; + break; + case OPT_NOCHAIN: + flags |= PKCS7_NOCHAIN; + break; + case OPT_NOCERTS: + flags |= PKCS7_NOCERTS; + break; + case OPT_NOATTR: + flags |= PKCS7_NOATTR; + break; + case OPT_NODETACH: + flags &= ~PKCS7_DETACHED; + break; + case OPT_NOSMIMECAP: + flags |= PKCS7_NOSMIMECAP; + break; + case OPT_BINARY: + flags |= PKCS7_BINARY; + break; + case OPT_NOSIGS: + flags |= PKCS7_NOSIGS; + break; + case OPT_STREAM: + case OPT_INDEF: + indef = 1; + break; + case OPT_NOINDEF: + indef = 0; + break; + case OPT_CRLFEOL: + flags |= PKCS7_CRLFEOL; + mime_eol = "\r\n"; + break; + case OPT_RAND: + inrand = opt_arg(); + need_rand = 1; + break; + case OPT_ENGINE: + e = setup_engine(opt_arg(), 0); + break; + case OPT_PASSIN: + passinarg = opt_arg(); + break; + case OPT_TO: + to = opt_arg(); + break; + case OPT_FROM: + from = opt_arg(); + break; + case OPT_SUBJECT: + subject = opt_arg(); + break; + case OPT_SIGNER: + /* If previous -signer argument add signer to list */ + if (signerfile) { + if (sksigners == NULL + && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL) + goto end; + sk_OPENSSL_STRING_push(sksigners, signerfile); + if (keyfile == NULL) + keyfile = signerfile; + if (skkeys == NULL + && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL) + goto end; + sk_OPENSSL_STRING_push(skkeys, keyfile); + keyfile = NULL; + } + signerfile = opt_arg(); + break; + case OPT_RECIP: + recipfile = opt_arg(); + break; + case OPT_MD: + if (!opt_md(opt_arg(), &sign_md)) + goto opthelp; + break; + case OPT_CIPHER: + if (!opt_cipher(opt_unknown(), &cipher)) + goto opthelp; + break; + case OPT_INKEY: + /* If previous -inkey argument add signer to list */ + if (keyfile) { + if (signerfile == NULL) { + BIO_printf(bio_err, + "%s: Must have -signer before -inkey\n", prog); + goto opthelp; + } + if (sksigners == NULL + && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL) + goto end; + sk_OPENSSL_STRING_push(sksigners, signerfile); + signerfile = NULL; + if (skkeys == NULL + && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL) + goto end; + sk_OPENSSL_STRING_push(skkeys, keyfile); + } + keyfile = opt_arg(); + break; + case OPT_KEYFORM: + if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform)) + goto opthelp; + break; + case OPT_CERTFILE: + certfile = opt_arg(); + break; + case OPT_CAFILE: + CAfile = opt_arg(); + break; + case OPT_CAPATH: + CApath = opt_arg(); + break; + case OPT_NOCAFILE: + noCAfile = 1; + break; + case OPT_NOCAPATH: + noCApath = 1; + break; + case OPT_CONTENT: + contfile = opt_arg(); + break; + case OPT_V_CASES: + if (!opt_verify(o, vpm)) + goto opthelp; + vpmtouched++; + break; + } + } + argc = opt_num_rest(); + argv = opt_rest(); + + if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners)) { + BIO_puts(bio_err, "Multiple signers or keys not allowed\n"); + goto opthelp; + } + + if (operation & SMIME_SIGNERS) { + /* Check to see if any final signer needs to be appended */ + if (keyfile && !signerfile) { + BIO_puts(bio_err, "Illegal -inkey without -signer\n"); + goto opthelp; + } + if (signerfile) { + if (!sksigners + && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL) + goto end; + sk_OPENSSL_STRING_push(sksigners, signerfile); + if (!skkeys && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL) + goto end; + if (!keyfile) + keyfile = signerfile; + sk_OPENSSL_STRING_push(skkeys, keyfile); + } + if (!sksigners) { + BIO_printf(bio_err, "No signer certificate specified\n"); + goto opthelp; + } + signerfile = NULL; + keyfile = NULL; + need_rand = 1; + } else if (operation == SMIME_DECRYPT) { + if (!recipfile && !keyfile) { + BIO_printf(bio_err, + "No recipient certificate or key specified\n"); + goto opthelp; + } + } else if (operation == SMIME_ENCRYPT) { + if (argc == 0) { + BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n"); + goto opthelp; + } + need_rand = 1; + } else if (!operation) + goto opthelp; + + if (!app_passwd(passinarg, NULL, &passin, NULL)) { + BIO_printf(bio_err, "Error getting password\n"); + goto end; + } + + if (need_rand) { + app_RAND_load_file(NULL, (inrand != NULL)); + if (inrand != NULL) + BIO_printf(bio_err, "%ld semi-random bytes loaded\n", + app_RAND_load_files(inrand)); + } + + ret = 2; + + if (!(operation & SMIME_SIGNERS)) + flags &= ~PKCS7_DETACHED; + + if (!(operation & SMIME_OP)) { + if (flags & PKCS7_BINARY) + outformat = FORMAT_BINARY; + } + + if (!(operation & SMIME_IP)) { + if (flags & PKCS7_BINARY) + informat = FORMAT_BINARY; + } + + if (operation == SMIME_ENCRYPT) { + if (!cipher) { +#ifndef OPENSSL_NO_DES + cipher = EVP_des_ede3_cbc(); +#else + BIO_printf(bio_err, "No cipher selected\n"); + goto end; +#endif + } + encerts = sk_X509_new_null(); + if (!encerts) + goto end; + while (*argv) { + cert = load_cert(*argv, FORMAT_PEM, + "recipient certificate file"); + if (cert == NULL) + goto end; + sk_X509_push(encerts, cert); + cert = NULL; + argv++; + } + } + + if (certfile) { + if (!load_certs(certfile, &other, FORMAT_PEM, NULL, + "certificate file")) { + ERR_print_errors(bio_err); + goto end; + } + } + + if (recipfile && (operation == SMIME_DECRYPT)) { + if ((recip = load_cert(recipfile, FORMAT_PEM, + "recipient certificate file")) == NULL) { + ERR_print_errors(bio_err); + goto end; + } + } + + if (operation == SMIME_DECRYPT) { + if (!keyfile) + keyfile = recipfile; + } else if (operation == SMIME_SIGN) { + if (!keyfile) + keyfile = signerfile; + } else + keyfile = NULL; + + if (keyfile) { + key = load_key(keyfile, keyform, 0, passin, e, "signing key file"); + if (!key) + goto end; + } + + in = bio_open_default(infile, 'r', informat); + if (in == NULL) + goto end; + + if (operation & SMIME_IP) { + if (informat == FORMAT_SMIME) + p7 = SMIME_read_PKCS7(in, &indata); + else if (informat == FORMAT_PEM) + p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL); + else if (informat == FORMAT_ASN1) + p7 = d2i_PKCS7_bio(in, NULL); + else { + BIO_printf(bio_err, "Bad input format for PKCS#7 file\n"); + goto end; + } + + if (!p7) { + BIO_printf(bio_err, "Error reading S/MIME message\n"); + goto end; + } + if (contfile) { + BIO_free(indata); + if ((indata = BIO_new_file(contfile, "rb")) == NULL) { + BIO_printf(bio_err, "Can't read content file %s\n", contfile); + goto end; + } + } + } + + out = bio_open_default(outfile, 'w', outformat); + if (out == NULL) + goto end; + + if (operation == SMIME_VERIFY) { + if ((store = setup_verify(CAfile, CApath, noCAfile, noCApath)) == NULL) + goto end; + X509_STORE_set_verify_cb(store, smime_cb); + if (vpmtouched) + X509_STORE_set1_param(store, vpm); + } + + ret = 3; + + if (operation == SMIME_ENCRYPT) { + if (indef) + flags |= PKCS7_STREAM; + p7 = PKCS7_encrypt(encerts, in, cipher, flags); + } else if (operation & SMIME_SIGNERS) { + int i; + /* + * If detached data content we only enable streaming if S/MIME output + * format. + */ + if (operation == SMIME_SIGN) { + if (flags & PKCS7_DETACHED) { + if (outformat == FORMAT_SMIME) + flags |= PKCS7_STREAM; + } else if (indef) + flags |= PKCS7_STREAM; + flags |= PKCS7_PARTIAL; + p7 = PKCS7_sign(NULL, NULL, other, in, flags); + if (!p7) + goto end; + if (flags & PKCS7_NOCERTS) { + for (i = 0; i < sk_X509_num(other); i++) { + X509 *x = sk_X509_value(other, i); + PKCS7_add_certificate(p7, x); + } + } + } else + flags |= PKCS7_REUSE_DIGEST; + for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++) { + signerfile = sk_OPENSSL_STRING_value(sksigners, i); + keyfile = sk_OPENSSL_STRING_value(skkeys, i); + signer = load_cert(signerfile, FORMAT_PEM, + "signer certificate"); + if (!signer) + goto end; + key = load_key(keyfile, keyform, 0, passin, e, "signing key file"); + if (!key) + goto end; + if (!PKCS7_sign_add_signer(p7, signer, key, sign_md, flags)) + goto end; + X509_free(signer); + signer = NULL; + EVP_PKEY_free(key); + key = NULL; + } + /* If not streaming or resigning finalize structure */ + if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM)) { + if (!PKCS7_final(p7, in, flags)) + goto end; + } + } + + if (!p7) { + BIO_printf(bio_err, "Error creating PKCS#7 structure\n"); + goto end; + } + + ret = 4; + if (operation == SMIME_DECRYPT) { + if (!PKCS7_decrypt(p7, key, recip, out, flags)) { + BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n"); + goto end; + } + } else if (operation == SMIME_VERIFY) { + STACK_OF(X509) *signers; + if (PKCS7_verify(p7, other, store, indata, out, flags)) + BIO_printf(bio_err, "Verification successful\n"); + else { + BIO_printf(bio_err, "Verification failure\n"); + goto end; + } + signers = PKCS7_get0_signers(p7, other, flags); + if (!save_certs(signerfile, signers)) { + BIO_printf(bio_err, "Error writing signers to %s\n", signerfile); + ret = 5; + goto end; + } + sk_X509_free(signers); + } else if (operation == SMIME_PK7OUT) + PEM_write_bio_PKCS7(out, p7); + else { + if (to) + BIO_printf(out, "To: %s%s", to, mime_eol); + if (from) + BIO_printf(out, "From: %s%s", from, mime_eol); + if (subject) + BIO_printf(out, "Subject: %s%s", subject, mime_eol); + if (outformat == FORMAT_SMIME) { + if (operation == SMIME_RESIGN) + rv = SMIME_write_PKCS7(out, p7, indata, flags); + else + rv = SMIME_write_PKCS7(out, p7, in, flags); + } else if (outformat == FORMAT_PEM) + rv = PEM_write_bio_PKCS7_stream(out, p7, in, flags); + else if (outformat == FORMAT_ASN1) + rv = i2d_PKCS7_bio_stream(out, p7, in, flags); + else { + BIO_printf(bio_err, "Bad output format for PKCS#7 file\n"); + goto end; + } + if (rv == 0) { + BIO_printf(bio_err, "Error writing output\n"); + ret = 3; + goto end; + } + } + ret = 0; + end: + if (need_rand) + app_RAND_write_file(NULL); + if (ret) + ERR_print_errors(bio_err); + sk_X509_pop_free(encerts, X509_free); + sk_X509_pop_free(other, X509_free); + X509_VERIFY_PARAM_free(vpm); + sk_OPENSSL_STRING_free(sksigners); + sk_OPENSSL_STRING_free(skkeys); + X509_STORE_free(store); + X509_free(cert); + X509_free(recip); + X509_free(signer); + EVP_PKEY_free(key); + PKCS7_free(p7); + release_engine(e); + BIO_free(in); + BIO_free(indata); + BIO_free_all(out); + OPENSSL_free(passin); + return (ret); +} + +static int save_certs(char *signerfile, STACK_OF(X509) *signers) +{ + int i; + BIO *tmp; + if (!signerfile) + return 1; + tmp = BIO_new_file(signerfile, "w"); + if (!tmp) + return 0; + for (i = 0; i < sk_X509_num(signers); i++) + PEM_write_bio_X509(tmp, sk_X509_value(signers, i)); + BIO_free(tmp); + return 1; +} + +/* Minimal callback just to output policy info (if any) */ + +static int smime_cb(int ok, X509_STORE_CTX *ctx) +{ + int error; + + error = X509_STORE_CTX_get_error(ctx); + + if ((error != X509_V_ERR_NO_EXPLICIT_POLICY) + && ((error != X509_V_OK) || (ok != 2))) + return ok; + + policies_print(ctx); + + return ok; + +} |