| 1 | /*
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| 2 | * Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /* S/MIME utility function */
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| 11 |
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| 12 | #include <stdio.h>
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| 13 | #include <string.h>
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| 14 | #include "apps.h"
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| 15 | #include "progs.h"
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| 16 | #include <openssl/crypto.h>
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| 17 | #include <openssl/pem.h>
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| 18 | #include <openssl/err.h>
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| 19 | #include <openssl/x509_vfy.h>
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| 20 | #include <openssl/x509v3.h>
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| 21 |
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| 22 | static int save_certs(char *signerfile, STACK_OF(X509) *signers);
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| 23 | static int smime_cb(int ok, X509_STORE_CTX *ctx);
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| 24 |
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| 25 | #define SMIME_OP 0x10
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| 26 | #define SMIME_IP 0x20
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| 27 | #define SMIME_SIGNERS 0x40
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| 28 | #define SMIME_ENCRYPT (1 | SMIME_OP)
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| 29 | #define SMIME_DECRYPT (2 | SMIME_IP)
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| 30 | #define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS)
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| 31 | #define SMIME_VERIFY (4 | SMIME_IP)
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| 32 | #define SMIME_PK7OUT (5 | SMIME_IP | SMIME_OP)
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| 33 | #define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
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| 34 |
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| 35 | typedef enum OPTION_choice {
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| 36 | OPT_COMMON,
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| 37 | OPT_ENCRYPT, OPT_DECRYPT, OPT_SIGN, OPT_RESIGN, OPT_VERIFY,
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| 38 | OPT_PK7OUT, OPT_TEXT, OPT_NOINTERN, OPT_NOVERIFY, OPT_NOCHAIN,
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| 39 | OPT_NOCERTS, OPT_NOATTR, OPT_NODETACH, OPT_NOSMIMECAP,
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| 40 | OPT_BINARY, OPT_NOSIGS, OPT_STREAM, OPT_INDEF, OPT_NOINDEF,
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| 41 | OPT_CRLFEOL, OPT_ENGINE, OPT_PASSIN,
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| 42 | OPT_TO, OPT_FROM, OPT_SUBJECT, OPT_SIGNER, OPT_RECIP, OPT_MD,
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| 43 | OPT_CIPHER, OPT_INKEY, OPT_KEYFORM, OPT_CERTFILE, OPT_CAFILE,
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| 44 | OPT_CAPATH, OPT_CASTORE, OPT_NOCAFILE, OPT_NOCAPATH, OPT_NOCASTORE,
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| 45 | OPT_R_ENUM, OPT_PROV_ENUM, OPT_CONFIG,
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| 46 | OPT_V_ENUM,
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| 47 | OPT_IN, OPT_INFORM, OPT_OUT,
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| 48 | OPT_OUTFORM, OPT_CONTENT
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| 49 | } OPTION_CHOICE;
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| 50 |
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| 51 | const OPTIONS smime_options[] = {
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| 52 | {OPT_HELP_STR, 1, '-', "Usage: %s [options] [cert...]\n"},
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| 53 |
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| 54 | OPT_SECTION("General"),
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| 55 | {"help", OPT_HELP, '-', "Display this summary"},
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| 56 | {"in", OPT_IN, '<', "Input file"},
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| 57 | {"inform", OPT_INFORM, 'c', "Input format SMIME (default), PEM or DER"},
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| 58 | {"out", OPT_OUT, '>', "Output file"},
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| 59 | {"outform", OPT_OUTFORM, 'c',
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| 60 | "Output format SMIME (default), PEM or DER"},
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| 61 | {"inkey", OPT_INKEY, 's',
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| 62 | "Input private key (if not signer or recipient)"},
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| 63 | {"keyform", OPT_KEYFORM, 'f', "Input private key format (ENGINE, other values ignored)"},
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| 64 | #ifndef OPENSSL_NO_ENGINE
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| 65 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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| 66 | #endif
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| 67 | {"stream", OPT_STREAM, '-', "Enable CMS streaming" },
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| 68 | {"indef", OPT_INDEF, '-', "Same as -stream" },
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| 69 | {"noindef", OPT_NOINDEF, '-', "Disable CMS streaming"},
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| 70 | OPT_CONFIG_OPTION,
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| 71 |
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| 72 | OPT_SECTION("Action"),
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| 73 | {"encrypt", OPT_ENCRYPT, '-', "Encrypt message"},
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| 74 | {"decrypt", OPT_DECRYPT, '-', "Decrypt encrypted message"},
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| 75 | {"sign", OPT_SIGN, '-', "Sign message"},
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| 76 | {"resign", OPT_RESIGN, '-', "Resign a signed message"},
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| 77 | {"verify", OPT_VERIFY, '-', "Verify signed message"},
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| 78 |
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| 79 | OPT_SECTION("Signing/Encryption"),
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| 80 | {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
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| 81 | {"md", OPT_MD, 's', "Digest algorithm to use when signing or resigning"},
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| 82 | {"", OPT_CIPHER, '-', "Any supported cipher"},
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| 83 | {"pk7out", OPT_PK7OUT, '-', "Output PKCS#7 structure"},
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| 84 | {"nointern", OPT_NOINTERN, '-',
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| 85 | "Don't search certificates in message for signer"},
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| 86 | {"nodetach", OPT_NODETACH, '-', "Use opaque signing"},
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| 87 | {"noattr", OPT_NOATTR, '-', "Don't include any signed attributes"},
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| 88 | {"binary", OPT_BINARY, '-', "Don't translate message to text"},
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| 89 | {"signer", OPT_SIGNER, 's', "Signer certificate file"},
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| 90 | {"content", OPT_CONTENT, '<',
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| 91 | "Supply or override content for detached signature"},
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| 92 | {"nocerts", OPT_NOCERTS, '-',
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| 93 | "Don't include signers certificate when signing"},
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| 94 |
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| 95 | OPT_SECTION("Verification/Decryption"),
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| 96 | {"nosigs", OPT_NOSIGS, '-', "Don't verify message signature"},
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| 97 | {"noverify", OPT_NOVERIFY, '-', "Don't verify signers certificate"},
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| 98 |
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| 99 | {"certfile", OPT_CERTFILE, '<', "Other certificates file"},
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| 100 | {"recip", OPT_RECIP, '<', "Recipient certificate file for decryption"},
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| 101 |
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| 102 | OPT_SECTION("Email"),
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| 103 | {"to", OPT_TO, 's', "To address"},
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| 104 | {"from", OPT_FROM, 's', "From address"},
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| 105 | {"subject", OPT_SUBJECT, 's', "Subject"},
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| 106 | {"text", OPT_TEXT, '-', "Include or delete text MIME headers"},
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| 107 | {"nosmimecap", OPT_NOSMIMECAP, '-', "Omit the SMIMECapabilities attribute"},
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| 108 |
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| 109 | OPT_SECTION("Certificate chain"),
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| 110 | {"CApath", OPT_CAPATH, '/', "Trusted certificates directory"},
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| 111 | {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
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| 112 | {"CAstore", OPT_CASTORE, ':', "Trusted certificates store URI"},
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| 113 | {"no-CAfile", OPT_NOCAFILE, '-',
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| 114 | "Do not load the default certificates file"},
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| 115 | {"no-CApath", OPT_NOCAPATH, '-',
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| 116 | "Do not load certificates from the default certificates directory"},
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| 117 | {"no-CAstore", OPT_NOCASTORE, '-',
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| 118 | "Do not load certificates from the default certificates store"},
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| 119 | {"nochain", OPT_NOCHAIN, '-',
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| 120 | "set PKCS7_NOCHAIN so certificates contained in the message are not used as untrusted CAs" },
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| 121 | {"crlfeol", OPT_CRLFEOL, '-', "Use CRLF as EOL termination instead of CR only"},
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| 122 |
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| 123 | OPT_R_OPTIONS,
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| 124 | OPT_V_OPTIONS,
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| 125 | OPT_PROV_OPTIONS,
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| 126 |
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| 127 | OPT_PARAMETERS(),
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| 128 | {"cert", 0, 0, "Recipient certs, used when encrypting"},
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| 129 | {NULL}
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| 130 | };
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| 131 |
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| 132 | int smime_main(int argc, char **argv)
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| 133 | {
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| 134 | CONF *conf = NULL;
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| 135 | BIO *in = NULL, *out = NULL, *indata = NULL;
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| 136 | EVP_PKEY *key = NULL;
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| 137 | PKCS7 *p7 = NULL;
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| 138 | STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL;
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| 139 | STACK_OF(X509) *encerts = NULL, *other = NULL;
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| 140 | X509 *cert = NULL, *recip = NULL, *signer = NULL;
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| 141 | X509_STORE *store = NULL;
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| 142 | X509_VERIFY_PARAM *vpm = NULL;
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| 143 | EVP_CIPHER *cipher = NULL;
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| 144 | EVP_MD *sign_md = NULL;
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| 145 | const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL, *prog = NULL;
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| 146 | char *certfile = NULL, *keyfile = NULL, *contfile = NULL;
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| 147 | char *infile = NULL, *outfile = NULL, *signerfile = NULL, *recipfile = NULL;
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| 148 | char *passinarg = NULL, *passin = NULL, *to = NULL, *from = NULL;
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| 149 | char *subject = NULL, *digestname = NULL, *ciphername = NULL;
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| 150 | OPTION_CHOICE o;
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| 151 | int noCApath = 0, noCAfile = 0, noCAstore = 0;
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| 152 | int flags = PKCS7_DETACHED, operation = 0, ret = 0, indef = 0;
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| 153 | int informat = FORMAT_SMIME, outformat = FORMAT_SMIME, keyform =
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| 154 | FORMAT_UNDEF;
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| 155 | int vpmtouched = 0, rv = 0;
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| 156 | ENGINE *e = NULL;
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| 157 | const char *mime_eol = "\n";
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| 158 | OSSL_LIB_CTX *libctx = app_get0_libctx();
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| 159 |
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| 160 | if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
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| 161 | return 1;
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| 162 |
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| 163 | prog = opt_init(argc, argv, smime_options);
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| 164 | while ((o = opt_next()) != OPT_EOF) {
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| 165 | switch (o) {
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| 166 | case OPT_EOF:
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| 167 | case OPT_ERR:
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| 168 | opthelp:
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| 169 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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| 170 | goto end;
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| 171 | case OPT_HELP:
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| 172 | opt_help(smime_options);
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| 173 | ret = 0;
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| 174 | goto end;
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| 175 | case OPT_INFORM:
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| 176 | if (!opt_format(opt_arg(), OPT_FMT_PDS, &informat))
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| 177 | goto opthelp;
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| 178 | break;
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| 179 | case OPT_IN:
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| 180 | infile = opt_arg();
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| 181 | break;
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| 182 | case OPT_OUTFORM:
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| 183 | if (!opt_format(opt_arg(), OPT_FMT_PDS, &outformat))
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| 184 | goto opthelp;
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| 185 | break;
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| 186 | case OPT_OUT:
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| 187 | outfile = opt_arg();
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| 188 | break;
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| 189 | case OPT_ENCRYPT:
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| 190 | operation = SMIME_ENCRYPT;
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| 191 | break;
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| 192 | case OPT_DECRYPT:
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| 193 | operation = SMIME_DECRYPT;
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| 194 | break;
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| 195 | case OPT_SIGN:
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| 196 | operation = SMIME_SIGN;
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| 197 | break;
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| 198 | case OPT_RESIGN:
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| 199 | operation = SMIME_RESIGN;
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| 200 | break;
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| 201 | case OPT_VERIFY:
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| 202 | operation = SMIME_VERIFY;
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| 203 | break;
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| 204 | case OPT_PK7OUT:
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| 205 | operation = SMIME_PK7OUT;
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| 206 | break;
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| 207 | case OPT_TEXT:
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| 208 | flags |= PKCS7_TEXT;
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| 209 | break;
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| 210 | case OPT_NOINTERN:
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| 211 | flags |= PKCS7_NOINTERN;
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| 212 | break;
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| 213 | case OPT_NOVERIFY:
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| 214 | flags |= PKCS7_NOVERIFY;
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| 215 | break;
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| 216 | case OPT_NOCHAIN:
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| 217 | flags |= PKCS7_NOCHAIN;
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| 218 | break;
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| 219 | case OPT_NOCERTS:
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| 220 | flags |= PKCS7_NOCERTS;
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| 221 | break;
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| 222 | case OPT_NOATTR:
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| 223 | flags |= PKCS7_NOATTR;
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| 224 | break;
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| 225 | case OPT_NODETACH:
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| 226 | flags &= ~PKCS7_DETACHED;
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| 227 | break;
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| 228 | case OPT_NOSMIMECAP:
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| 229 | flags |= PKCS7_NOSMIMECAP;
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| 230 | break;
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| 231 | case OPT_BINARY:
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| 232 | flags |= PKCS7_BINARY;
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| 233 | break;
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| 234 | case OPT_NOSIGS:
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| 235 | flags |= PKCS7_NOSIGS;
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| 236 | break;
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| 237 | case OPT_STREAM:
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| 238 | case OPT_INDEF:
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| 239 | indef = 1;
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| 240 | break;
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| 241 | case OPT_NOINDEF:
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| 242 | indef = 0;
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| 243 | break;
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| 244 | case OPT_CRLFEOL:
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| 245 | flags |= PKCS7_CRLFEOL;
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| 246 | mime_eol = "\r\n";
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| 247 | break;
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| 248 | case OPT_R_CASES:
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| 249 | if (!opt_rand(o))
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| 250 | goto end;
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| 251 | break;
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| 252 | case OPT_PROV_CASES:
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| 253 | if (!opt_provider(o))
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| 254 | goto end;
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| 255 | break;
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| 256 | case OPT_CONFIG:
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| 257 | conf = app_load_config_modules(opt_arg());
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| 258 | if (conf == NULL)
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| 259 | goto end;
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| 260 | break;
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| 261 | case OPT_ENGINE:
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| 262 | e = setup_engine(opt_arg(), 0);
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| 263 | break;
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| 264 | case OPT_PASSIN:
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| 265 | passinarg = opt_arg();
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| 266 | break;
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| 267 | case OPT_TO:
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| 268 | to = opt_arg();
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| 269 | break;
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| 270 | case OPT_FROM:
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| 271 | from = opt_arg();
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| 272 | break;
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| 273 | case OPT_SUBJECT:
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| 274 | subject = opt_arg();
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| 275 | break;
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| 276 | case OPT_SIGNER:
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| 277 | /* If previous -signer argument add signer to list */
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| 278 | if (signerfile != NULL) {
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| 279 | if (sksigners == NULL
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| 280 | && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)
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| 281 | goto end;
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| 282 | sk_OPENSSL_STRING_push(sksigners, signerfile);
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| 283 | if (keyfile == NULL)
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| 284 | keyfile = signerfile;
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| 285 | if (skkeys == NULL
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| 286 | && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
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| 287 | goto end;
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| 288 | sk_OPENSSL_STRING_push(skkeys, keyfile);
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| 289 | keyfile = NULL;
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| 290 | }
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| 291 | signerfile = opt_arg();
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| 292 | break;
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| 293 | case OPT_RECIP:
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| 294 | recipfile = opt_arg();
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| 295 | break;
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| 296 | case OPT_MD:
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| 297 | digestname = opt_arg();
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| 298 | break;
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| 299 | case OPT_CIPHER:
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| 300 | ciphername = opt_unknown();
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| 301 | break;
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| 302 | case OPT_INKEY:
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| 303 | /* If previous -inkey argument add signer to list */
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| 304 | if (keyfile != NULL) {
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| 305 | if (signerfile == NULL) {
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| 306 | BIO_printf(bio_err,
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| 307 | "%s: Must have -signer before -inkey\n", prog);
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| 308 | goto opthelp;
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| 309 | }
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| 310 | if (sksigners == NULL
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| 311 | && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)
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| 312 | goto end;
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| 313 | sk_OPENSSL_STRING_push(sksigners, signerfile);
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| 314 | signerfile = NULL;
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| 315 | if (skkeys == NULL
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| 316 | && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
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| 317 | goto end;
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| 318 | sk_OPENSSL_STRING_push(skkeys, keyfile);
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| 319 | }
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| 320 | keyfile = opt_arg();
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| 321 | break;
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| 322 | case OPT_KEYFORM:
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| 323 | if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))
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| 324 | goto opthelp;
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| 325 | break;
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| 326 | case OPT_CERTFILE:
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| 327 | certfile = opt_arg();
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| 328 | break;
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| 329 | case OPT_CAFILE:
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| 330 | CAfile = opt_arg();
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| 331 | break;
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| 332 | case OPT_CAPATH:
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| 333 | CApath = opt_arg();
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| 334 | break;
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| 335 | case OPT_CASTORE:
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| 336 | CAstore = opt_arg();
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| 337 | break;
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| 338 | case OPT_NOCAFILE:
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| 339 | noCAfile = 1;
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| 340 | break;
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| 341 | case OPT_NOCAPATH:
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| 342 | noCApath = 1;
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| 343 | break;
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| 344 | case OPT_NOCASTORE:
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| 345 | noCAstore = 1;
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| 346 | break;
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| 347 | case OPT_CONTENT:
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| 348 | contfile = opt_arg();
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| 349 | break;
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| 350 | case OPT_V_CASES:
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| 351 | if (!opt_verify(o, vpm))
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| 352 | goto opthelp;
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| 353 | vpmtouched++;
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| 354 | break;
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| 355 | }
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| 356 | }
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| 357 |
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| 358 | /* Extra arguments are files with recipient keys. */
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| 359 | argc = opt_num_rest();
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| 360 | argv = opt_rest();
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| 361 |
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| 362 | if (!app_RAND_load())
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| 363 | goto end;
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| 364 |
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| 365 | if (digestname != NULL) {
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| 366 | if (!opt_md(digestname, &sign_md))
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| 367 | goto opthelp;
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| 368 | }
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| 369 | if (ciphername != NULL) {
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| 370 | if (!opt_cipher_any(ciphername, &cipher))
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| 371 | goto opthelp;
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| 372 | }
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| 373 | if (!(operation & SMIME_SIGNERS) && (skkeys != NULL || sksigners != NULL)) {
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| 374 | BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
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| 375 | goto opthelp;
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| 376 | }
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| 377 | if (!operation) {
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| 378 | BIO_puts(bio_err,
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| 379 | "No operation (-encrypt|-sign|...) specified\n");
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| 380 | goto opthelp;
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| 381 | }
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| 382 |
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| 383 | if (operation & SMIME_SIGNERS) {
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| 384 | /* Check to see if any final signer needs to be appended */
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| 385 | if (keyfile && !signerfile) {
|
|---|
| 386 | BIO_puts(bio_err, "Illegal -inkey without -signer\n");
|
|---|
| 387 | goto opthelp;
|
|---|
| 388 | }
|
|---|
| 389 | if (signerfile != NULL) {
|
|---|
| 390 | if (sksigners == NULL
|
|---|
| 391 | && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)
|
|---|
| 392 | goto end;
|
|---|
| 393 | sk_OPENSSL_STRING_push(sksigners, signerfile);
|
|---|
| 394 | if (!skkeys && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
|
|---|
| 395 | goto end;
|
|---|
| 396 | if (!keyfile)
|
|---|
| 397 | keyfile = signerfile;
|
|---|
| 398 | sk_OPENSSL_STRING_push(skkeys, keyfile);
|
|---|
| 399 | }
|
|---|
| 400 | if (sksigners == NULL) {
|
|---|
| 401 | BIO_printf(bio_err, "No signer certificate specified\n");
|
|---|
| 402 | goto opthelp;
|
|---|
| 403 | }
|
|---|
| 404 | signerfile = NULL;
|
|---|
| 405 | keyfile = NULL;
|
|---|
| 406 | } else if (operation == SMIME_DECRYPT) {
|
|---|
| 407 | if (recipfile == NULL && keyfile == NULL) {
|
|---|
| 408 | BIO_printf(bio_err,
|
|---|
| 409 | "No recipient certificate or key specified\n");
|
|---|
| 410 | goto opthelp;
|
|---|
| 411 | }
|
|---|
| 412 | } else if (operation == SMIME_ENCRYPT) {
|
|---|
| 413 | if (argc == 0) {
|
|---|
| 414 | BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
|
|---|
| 415 | goto opthelp;
|
|---|
| 416 | }
|
|---|
| 417 | }
|
|---|
| 418 |
|
|---|
| 419 | if (!app_passwd(passinarg, NULL, &passin, NULL)) {
|
|---|
| 420 | BIO_printf(bio_err, "Error getting password\n");
|
|---|
| 421 | goto end;
|
|---|
| 422 | }
|
|---|
| 423 |
|
|---|
| 424 | ret = 2;
|
|---|
| 425 |
|
|---|
| 426 | if (!(operation & SMIME_SIGNERS))
|
|---|
| 427 | flags &= ~PKCS7_DETACHED;
|
|---|
| 428 |
|
|---|
| 429 | if (!(operation & SMIME_OP)) {
|
|---|
| 430 | if (flags & PKCS7_BINARY)
|
|---|
| 431 | outformat = FORMAT_BINARY;
|
|---|
| 432 | }
|
|---|
| 433 |
|
|---|
| 434 | if (!(operation & SMIME_IP)) {
|
|---|
| 435 | if (flags & PKCS7_BINARY)
|
|---|
| 436 | informat = FORMAT_BINARY;
|
|---|
| 437 | }
|
|---|
| 438 |
|
|---|
| 439 | if (operation == SMIME_ENCRYPT) {
|
|---|
| 440 | if (cipher == NULL) {
|
|---|
| 441 | #ifndef OPENSSL_NO_DES
|
|---|
| 442 | cipher = (EVP_CIPHER *)EVP_des_ede3_cbc();
|
|---|
| 443 | #else
|
|---|
| 444 | BIO_printf(bio_err, "No cipher selected\n");
|
|---|
| 445 | goto end;
|
|---|
| 446 | #endif
|
|---|
| 447 | }
|
|---|
| 448 | encerts = sk_X509_new_null();
|
|---|
| 449 | if (encerts == NULL)
|
|---|
| 450 | goto end;
|
|---|
| 451 | while (*argv != NULL) {
|
|---|
| 452 | cert = load_cert(*argv, FORMAT_UNDEF,
|
|---|
| 453 | "recipient certificate file");
|
|---|
| 454 | if (cert == NULL)
|
|---|
| 455 | goto end;
|
|---|
| 456 | sk_X509_push(encerts, cert);
|
|---|
| 457 | cert = NULL;
|
|---|
| 458 | argv++;
|
|---|
| 459 | }
|
|---|
| 460 | }
|
|---|
| 461 |
|
|---|
| 462 | if (certfile != NULL) {
|
|---|
| 463 | if (!load_certs(certfile, 0, &other, NULL, "certificates")) {
|
|---|
| 464 | ERR_print_errors(bio_err);
|
|---|
| 465 | goto end;
|
|---|
| 466 | }
|
|---|
| 467 | }
|
|---|
| 468 |
|
|---|
| 469 | if (recipfile != NULL && (operation == SMIME_DECRYPT)) {
|
|---|
| 470 | if ((recip = load_cert(recipfile, FORMAT_UNDEF,
|
|---|
| 471 | "recipient certificate file")) == NULL) {
|
|---|
| 472 | ERR_print_errors(bio_err);
|
|---|
| 473 | goto end;
|
|---|
| 474 | }
|
|---|
| 475 | }
|
|---|
| 476 |
|
|---|
| 477 | if (operation == SMIME_DECRYPT) {
|
|---|
| 478 | if (keyfile == NULL)
|
|---|
| 479 | keyfile = recipfile;
|
|---|
| 480 | } else if (operation == SMIME_SIGN) {
|
|---|
| 481 | if (keyfile == NULL)
|
|---|
| 482 | keyfile = signerfile;
|
|---|
| 483 | } else {
|
|---|
| 484 | keyfile = NULL;
|
|---|
| 485 | }
|
|---|
| 486 |
|
|---|
| 487 | if (keyfile != NULL) {
|
|---|
| 488 | key = load_key(keyfile, keyform, 0, passin, e, "signing key");
|
|---|
| 489 | if (key == NULL)
|
|---|
| 490 | goto end;
|
|---|
| 491 | }
|
|---|
| 492 |
|
|---|
| 493 | in = bio_open_default(infile, 'r', informat);
|
|---|
| 494 | if (in == NULL)
|
|---|
| 495 | goto end;
|
|---|
| 496 |
|
|---|
| 497 | if (operation & SMIME_IP) {
|
|---|
| 498 | PKCS7 *p7_in = NULL;
|
|---|
| 499 |
|
|---|
| 500 | p7 = PKCS7_new_ex(libctx, app_get0_propq());
|
|---|
| 501 | if (p7 == NULL) {
|
|---|
| 502 | BIO_printf(bio_err, "Error allocating PKCS7 object\n");
|
|---|
| 503 | goto end;
|
|---|
| 504 | }
|
|---|
| 505 | if (informat == FORMAT_SMIME) {
|
|---|
| 506 | p7_in = SMIME_read_PKCS7_ex(in, &indata, &p7);
|
|---|
| 507 | } else if (informat == FORMAT_PEM) {
|
|---|
| 508 | p7_in = PEM_read_bio_PKCS7(in, &p7, NULL, NULL);
|
|---|
| 509 | } else if (informat == FORMAT_ASN1) {
|
|---|
| 510 | p7_in = d2i_PKCS7_bio(in, &p7);
|
|---|
| 511 | } else {
|
|---|
| 512 | BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
|
|---|
| 513 | goto end;
|
|---|
| 514 | }
|
|---|
| 515 |
|
|---|
| 516 | if (p7_in == NULL) {
|
|---|
| 517 | BIO_printf(bio_err, "Error reading S/MIME message\n");
|
|---|
| 518 | goto end;
|
|---|
| 519 | }
|
|---|
| 520 | if (contfile != NULL) {
|
|---|
| 521 | BIO_free(indata);
|
|---|
| 522 | if ((indata = BIO_new_file(contfile, "rb")) == NULL) {
|
|---|
| 523 | BIO_printf(bio_err, "Can't read content file %s\n", contfile);
|
|---|
| 524 | goto end;
|
|---|
| 525 | }
|
|---|
| 526 | }
|
|---|
| 527 | }
|
|---|
| 528 |
|
|---|
| 529 | out = bio_open_default(outfile, 'w', outformat);
|
|---|
| 530 | if (out == NULL)
|
|---|
| 531 | goto end;
|
|---|
| 532 |
|
|---|
| 533 | if (operation == SMIME_VERIFY) {
|
|---|
| 534 | if ((store = setup_verify(CAfile, noCAfile, CApath, noCApath,
|
|---|
| 535 | CAstore, noCAstore)) == NULL)
|
|---|
| 536 | goto end;
|
|---|
| 537 | X509_STORE_set_verify_cb(store, smime_cb);
|
|---|
| 538 | if (vpmtouched)
|
|---|
| 539 | X509_STORE_set1_param(store, vpm);
|
|---|
| 540 | }
|
|---|
| 541 |
|
|---|
| 542 | ret = 3;
|
|---|
| 543 |
|
|---|
| 544 | if (operation == SMIME_ENCRYPT) {
|
|---|
| 545 | if (indef)
|
|---|
| 546 | flags |= PKCS7_STREAM;
|
|---|
| 547 | p7 = PKCS7_encrypt_ex(encerts, in, cipher, flags, libctx, app_get0_propq());
|
|---|
| 548 | } else if (operation & SMIME_SIGNERS) {
|
|---|
| 549 | int i;
|
|---|
| 550 | /*
|
|---|
| 551 | * If detached data content we only enable streaming if S/MIME output
|
|---|
| 552 | * format.
|
|---|
| 553 | */
|
|---|
| 554 | if (operation == SMIME_SIGN) {
|
|---|
| 555 | if (flags & PKCS7_DETACHED) {
|
|---|
| 556 | if (outformat == FORMAT_SMIME)
|
|---|
| 557 | flags |= PKCS7_STREAM;
|
|---|
| 558 | } else if (indef) {
|
|---|
| 559 | flags |= PKCS7_STREAM;
|
|---|
| 560 | }
|
|---|
| 561 | flags |= PKCS7_PARTIAL;
|
|---|
| 562 | p7 = PKCS7_sign_ex(NULL, NULL, other, in, flags, libctx, app_get0_propq());
|
|---|
| 563 | if (p7 == NULL)
|
|---|
| 564 | goto end;
|
|---|
| 565 | if (flags & PKCS7_NOCERTS) {
|
|---|
| 566 | for (i = 0; i < sk_X509_num(other); i++) {
|
|---|
| 567 | X509 *x = sk_X509_value(other, i);
|
|---|
| 568 | PKCS7_add_certificate(p7, x);
|
|---|
| 569 | }
|
|---|
| 570 | }
|
|---|
| 571 | } else {
|
|---|
| 572 | flags |= PKCS7_REUSE_DIGEST;
|
|---|
| 573 | }
|
|---|
| 574 | for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++) {
|
|---|
| 575 | signerfile = sk_OPENSSL_STRING_value(sksigners, i);
|
|---|
| 576 | keyfile = sk_OPENSSL_STRING_value(skkeys, i);
|
|---|
| 577 | signer = load_cert(signerfile, FORMAT_UNDEF, "signer certificate");
|
|---|
| 578 | if (signer == NULL)
|
|---|
| 579 | goto end;
|
|---|
| 580 | key = load_key(keyfile, keyform, 0, passin, e, "signing key");
|
|---|
| 581 | if (key == NULL)
|
|---|
| 582 | goto end;
|
|---|
| 583 |
|
|---|
| 584 | if (!PKCS7_sign_add_signer(p7, signer, key, sign_md, flags))
|
|---|
| 585 | goto end;
|
|---|
| 586 | X509_free(signer);
|
|---|
| 587 | signer = NULL;
|
|---|
| 588 | EVP_PKEY_free(key);
|
|---|
| 589 | key = NULL;
|
|---|
| 590 | }
|
|---|
| 591 | /* If not streaming or resigning finalize structure */
|
|---|
| 592 | if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM)) {
|
|---|
| 593 | if (!PKCS7_final(p7, in, flags))
|
|---|
| 594 | goto end;
|
|---|
| 595 | }
|
|---|
| 596 | }
|
|---|
| 597 |
|
|---|
| 598 | if (p7 == NULL) {
|
|---|
| 599 | BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
|
|---|
| 600 | goto end;
|
|---|
| 601 | }
|
|---|
| 602 |
|
|---|
| 603 | ret = 4;
|
|---|
| 604 | if (operation == SMIME_DECRYPT) {
|
|---|
| 605 | if (!PKCS7_decrypt(p7, key, recip, out, flags)) {
|
|---|
| 606 | BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
|
|---|
| 607 | goto end;
|
|---|
| 608 | }
|
|---|
| 609 | } else if (operation == SMIME_VERIFY) {
|
|---|
| 610 | STACK_OF(X509) *signers;
|
|---|
| 611 | if (PKCS7_verify(p7, other, store, indata, out, flags))
|
|---|
| 612 | BIO_printf(bio_err, "Verification successful\n");
|
|---|
| 613 | else {
|
|---|
| 614 | BIO_printf(bio_err, "Verification failure\n");
|
|---|
| 615 | goto end;
|
|---|
| 616 | }
|
|---|
| 617 | signers = PKCS7_get0_signers(p7, other, flags);
|
|---|
| 618 | if (!save_certs(signerfile, signers)) {
|
|---|
| 619 | BIO_printf(bio_err, "Error writing signers to %s\n", signerfile);
|
|---|
| 620 | ret = 5;
|
|---|
| 621 | goto end;
|
|---|
| 622 | }
|
|---|
| 623 | sk_X509_free(signers);
|
|---|
| 624 | } else if (operation == SMIME_PK7OUT) {
|
|---|
| 625 | PEM_write_bio_PKCS7(out, p7);
|
|---|
| 626 | } else {
|
|---|
| 627 | if (to)
|
|---|
| 628 | BIO_printf(out, "To: %s%s", to, mime_eol);
|
|---|
| 629 | if (from)
|
|---|
| 630 | BIO_printf(out, "From: %s%s", from, mime_eol);
|
|---|
| 631 | if (subject)
|
|---|
| 632 | BIO_printf(out, "Subject: %s%s", subject, mime_eol);
|
|---|
| 633 | if (outformat == FORMAT_SMIME) {
|
|---|
| 634 | if (operation == SMIME_RESIGN)
|
|---|
| 635 | rv = SMIME_write_PKCS7(out, p7, indata, flags);
|
|---|
| 636 | else
|
|---|
| 637 | rv = SMIME_write_PKCS7(out, p7, in, flags);
|
|---|
| 638 | } else if (outformat == FORMAT_PEM) {
|
|---|
| 639 | rv = PEM_write_bio_PKCS7_stream(out, p7, in, flags);
|
|---|
| 640 | } else if (outformat == FORMAT_ASN1) {
|
|---|
| 641 | rv = i2d_PKCS7_bio_stream(out, p7, in, flags);
|
|---|
| 642 | } else {
|
|---|
| 643 | BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
|
|---|
| 644 | goto end;
|
|---|
| 645 | }
|
|---|
| 646 | if (rv == 0) {
|
|---|
| 647 | BIO_printf(bio_err, "Error writing output\n");
|
|---|
| 648 | ret = 3;
|
|---|
| 649 | goto end;
|
|---|
| 650 | }
|
|---|
| 651 | }
|
|---|
| 652 | ret = 0;
|
|---|
| 653 | end:
|
|---|
| 654 | if (ret)
|
|---|
| 655 | ERR_print_errors(bio_err);
|
|---|
| 656 | sk_X509_pop_free(encerts, X509_free);
|
|---|
| 657 | sk_X509_pop_free(other, X509_free);
|
|---|
| 658 | X509_VERIFY_PARAM_free(vpm);
|
|---|
| 659 | sk_OPENSSL_STRING_free(sksigners);
|
|---|
| 660 | sk_OPENSSL_STRING_free(skkeys);
|
|---|
| 661 | X509_STORE_free(store);
|
|---|
| 662 | X509_free(cert);
|
|---|
| 663 | X509_free(recip);
|
|---|
| 664 | X509_free(signer);
|
|---|
| 665 | EVP_PKEY_free(key);
|
|---|
| 666 | EVP_MD_free(sign_md);
|
|---|
| 667 | EVP_CIPHER_free(cipher);
|
|---|
| 668 | PKCS7_free(p7);
|
|---|
| 669 | release_engine(e);
|
|---|
| 670 | BIO_free(in);
|
|---|
| 671 | BIO_free(indata);
|
|---|
| 672 | BIO_free_all(out);
|
|---|
| 673 | OPENSSL_free(passin);
|
|---|
| 674 | NCONF_free(conf);
|
|---|
| 675 | return ret;
|
|---|
| 676 | }
|
|---|
| 677 |
|
|---|
| 678 | static int save_certs(char *signerfile, STACK_OF(X509) *signers)
|
|---|
| 679 | {
|
|---|
| 680 | int i;
|
|---|
| 681 | BIO *tmp;
|
|---|
| 682 |
|
|---|
| 683 | if (signerfile == NULL)
|
|---|
| 684 | return 1;
|
|---|
| 685 | tmp = BIO_new_file(signerfile, "w");
|
|---|
| 686 | if (tmp == NULL)
|
|---|
| 687 | return 0;
|
|---|
| 688 | for (i = 0; i < sk_X509_num(signers); i++)
|
|---|
| 689 | PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
|
|---|
| 690 | BIO_free(tmp);
|
|---|
| 691 | return 1;
|
|---|
| 692 | }
|
|---|
| 693 |
|
|---|
| 694 | /* Minimal callback just to output policy info (if any) */
|
|---|
| 695 |
|
|---|
| 696 | static int smime_cb(int ok, X509_STORE_CTX *ctx)
|
|---|
| 697 | {
|
|---|
| 698 | int error;
|
|---|
| 699 |
|
|---|
| 700 | error = X509_STORE_CTX_get_error(ctx);
|
|---|
| 701 |
|
|---|
| 702 | if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
|
|---|
| 703 | && ((error != X509_V_OK) || (ok != 2)))
|
|---|
| 704 | return ok;
|
|---|
| 705 |
|
|---|
| 706 | policies_print(ctx);
|
|---|
| 707 |
|
|---|
| 708 | return ok;
|
|---|
| 709 | }
|
|---|
