2 Bacula® - The Network Backup Solution
4 Copyright (C) 2005-2007 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version two of the GNU General Public
10 License as published by the Free Software Foundation plus additions
11 that are listed in the file LICENSE.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 Bacula® is a registered trademark of John Walker.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
29 * crypto.c Encryption support functions
31 * Author: Landon Fuller <landonf@opendarwin.org>
35 * This file was contributed to the Bacula project by Landon Fuller.
37 * Landon Fuller has been granted a perpetual, worldwide, non-exclusive,
38 * no-charge, royalty-free, irrevocable copyright license to reproduce,
39 * prepare derivative works of, publicly display, publicly perform,
40 * sublicense, and distribute the original work contributed by Landon Fuller
41 * to the Bacula project in source or object form.
43 * If you wish to license these contributions under an alternate open source
44 * license please contact Landon Fuller <landonf@opendarwin.org>.
56 * Prefix: iso.org.dod.internet.private.enterprise.threerings.external.bacula (1.3.6.1.4.1.22054.500.2)
57 * Organization: Bacula Project
58 * Contact Name: Kern Sibbald
59 * Contact E-mail: kern@sibbald.com
61 * Top Level Allocations - 500.2
62 * 1 - Published Allocations
63 * 1.1 - Bacula Encryption
65 * Bacula Encryption - 500.2.1.1
68 * 2 - ASN.1 Object Identifiers
74 * BaculaCrypto { iso(1) identified-organization(3) usdod(6)
75 * internet(1) private(4) enterprises(1) three-rings(22054)
76 * external(500) bacula(2) published(1) bacula-encryption(1)
77 * asn1-modules(1) bacula-crypto(1) }
79 * DEFINITIONS AUTOMATIC TAGS ::=
82 * SignatureData ::= SEQUENCE {
83 * version Version DEFAULT v0,
84 * signerInfo SignerInfo }
86 * CryptoData ::= SEQUENCE {
87 * version Version DEFAULT v0,
88 * contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier,
89 * iv InitializationVector,
90 * recipientInfo RecipientInfo
93 * SignerInfo ::= SET OF SignerInfo
94 * RecipientInfo ::= SET OF RecipientInfo
96 * Version ::= INTEGER { v0(0) }
98 * SignerInfo ::= SEQUENCE {
100 * subjectKeyIdentifier SubjectKeyIdentifier,
101 * digestAlgorithm DigestAlgorithmIdentifier,
102 * signatureAlgorithm SignatureAlgorithmIdentifier,
103 * signature SignatureValue }
105 * RecipientInfo ::= SEQUENCE {
107 * subjectKeyIdentifier SubjectKeyIdentifier
108 * keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier
109 * encryptedKey EncryptedKey
112 * SubjectKeyIdentifier ::= OCTET STRING
114 * DigestAlgorithmIdentifier ::= AlgorithmIdentifier
116 * SignatureAlgorithmIdentifier ::= AlgorithmIdentifier
118 * KeyEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
120 * ContentEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
122 * InitializationVector ::= OCTET STRING
124 * SignatureValue ::= OCTET STRING
126 * EncryptedKey ::= OCTET STRING
128 * AlgorithmIdentifier ::= OBJECT IDENTIFIER
133 #ifdef HAVE_CRYPTO /* Is encryption enabled? */
134 #ifdef HAVE_OPENSSL /* How about OpenSSL? */
136 /* Are we initialized? */
137 static int crypto_initialized = false;
139 /* ASN.1 Declarations */
140 #define BACULA_ASN1_VERSION 0
143 ASN1_INTEGER *version;
144 ASN1_OCTET_STRING *subjectKeyIdentifier;
145 ASN1_OBJECT *digestAlgorithm;
146 ASN1_OBJECT *signatureAlgorithm;
147 ASN1_OCTET_STRING *signature;
151 ASN1_INTEGER *version;
152 ASN1_OCTET_STRING *subjectKeyIdentifier;
153 ASN1_OBJECT *keyEncryptionAlgorithm;
154 ASN1_OCTET_STRING *encryptedKey;
157 ASN1_SEQUENCE(SignerInfo) = {
158 ASN1_SIMPLE(SignerInfo, version, ASN1_INTEGER),
159 ASN1_SIMPLE(SignerInfo, subjectKeyIdentifier, ASN1_OCTET_STRING),
160 ASN1_SIMPLE(SignerInfo, digestAlgorithm, ASN1_OBJECT),
161 ASN1_SIMPLE(SignerInfo, signatureAlgorithm, ASN1_OBJECT),
162 ASN1_SIMPLE(SignerInfo, signature, ASN1_OCTET_STRING)
163 } ASN1_SEQUENCE_END(SignerInfo);
165 ASN1_SEQUENCE(RecipientInfo) = {
166 ASN1_SIMPLE(RecipientInfo, version, ASN1_INTEGER),
167 ASN1_SIMPLE(RecipientInfo, subjectKeyIdentifier, ASN1_OCTET_STRING),
168 ASN1_SIMPLE(RecipientInfo, keyEncryptionAlgorithm, ASN1_OBJECT),
169 ASN1_SIMPLE(RecipientInfo, encryptedKey, ASN1_OCTET_STRING),
170 } ASN1_SEQUENCE_END(RecipientInfo);
173 ASN1_INTEGER *version;
174 STACK_OF(SignerInfo) *signerInfo;
178 ASN1_INTEGER *version;
179 ASN1_OBJECT *contentEncryptionAlgorithm;
180 ASN1_OCTET_STRING *iv;
181 STACK_OF(RecipientInfo) *recipientInfo;
184 ASN1_SEQUENCE(SignatureData) = {
185 ASN1_SIMPLE(SignatureData, version, ASN1_INTEGER),
186 ASN1_SET_OF(SignatureData, signerInfo, SignerInfo),
187 } ASN1_SEQUENCE_END(SignatureData);
189 ASN1_SEQUENCE(CryptoData) = {
190 ASN1_SIMPLE(CryptoData, version, ASN1_INTEGER),
191 ASN1_SIMPLE(CryptoData, contentEncryptionAlgorithm, ASN1_OBJECT),
192 ASN1_SIMPLE(CryptoData, iv, ASN1_OCTET_STRING),
193 ASN1_SET_OF(CryptoData, recipientInfo, RecipientInfo)
194 } ASN1_SEQUENCE_END(CryptoData);
196 IMPLEMENT_ASN1_FUNCTIONS(SignerInfo)
197 IMPLEMENT_ASN1_FUNCTIONS(RecipientInfo)
198 IMPLEMENT_ASN1_FUNCTIONS(SignatureData)
199 IMPLEMENT_ASN1_FUNCTIONS(CryptoData)
200 IMPLEMENT_STACK_OF(SignerInfo)
201 IMPLEMENT_STACK_OF(RecipientInfo)
204 * SignerInfo and RecipientInfo stack macros, generated by OpenSSL's util/mkstack.pl.
206 #define sk_SignerInfo_new(st) SKM_sk_new(SignerInfo, (st))
207 #define sk_SignerInfo_new_null() SKM_sk_new_null(SignerInfo)
208 #define sk_SignerInfo_free(st) SKM_sk_free(SignerInfo, (st))
209 #define sk_SignerInfo_num(st) SKM_sk_num(SignerInfo, (st))
210 #define sk_SignerInfo_value(st, i) SKM_sk_value(SignerInfo, (st), (i))
211 #define sk_SignerInfo_set(st, i, val) SKM_sk_set(SignerInfo, (st), (i), (val))
212 #define sk_SignerInfo_zero(st) SKM_sk_zero(SignerInfo, (st))
213 #define sk_SignerInfo_push(st, val) SKM_sk_push(SignerInfo, (st), (val))
214 #define sk_SignerInfo_unshift(st, val) SKM_sk_unshift(SignerInfo, (st), (val))
215 #define sk_SignerInfo_find(st, val) SKM_sk_find(SignerInfo, (st), (val))
216 #define sk_SignerInfo_delete(st, i) SKM_sk_delete(SignerInfo, (st), (i))
217 #define sk_SignerInfo_delete_ptr(st, ptr) SKM_sk_delete_ptr(SignerInfo, (st), (ptr))
218 #define sk_SignerInfo_insert(st, val, i) SKM_sk_insert(SignerInfo, (st), (val), (i))
219 #define sk_SignerInfo_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(SignerInfo, (st), (cmp))
220 #define sk_SignerInfo_dup(st) SKM_sk_dup(SignerInfo, st)
221 #define sk_SignerInfo_pop_free(st, free_func) SKM_sk_pop_free(SignerInfo, (st), (free_func))
222 #define sk_SignerInfo_shift(st) SKM_sk_shift(SignerInfo, (st))
223 #define sk_SignerInfo_pop(st) SKM_sk_pop(SignerInfo, (st))
224 #define sk_SignerInfo_sort(st) SKM_sk_sort(SignerInfo, (st))
225 #define sk_SignerInfo_is_sorted(st) SKM_sk_is_sorted(SignerInfo, (st))
227 #define d2i_ASN1_SET_OF_SignerInfo(st, pp, length, d2i_func, free_func, ex_tag, ex_class) \
228 SKM_ASN1_SET_OF_d2i(SignerInfo, (st), (pp), (length), (d2i_func), (free_func), (ex_tag), (ex_class))
229 #define i2d_ASN1_SET_OF_SignerInfo(st, pp, i2d_func, ex_tag, ex_class, is_set) \
230 SKM_ASN1_SET_OF_i2d(SignerInfo, (st), (pp), (i2d_func), (ex_tag), (ex_class), (is_set))
231 #define ASN1_seq_pack_SignerInfo(st, i2d_func, buf, len) \
232 SKM_ASN1_seq_pack(SignerInfo, (st), (i2d_func), (buf), (len))
233 #define ASN1_seq_unpack_SignerInfo(buf, len, d2i_func, free_func) \
234 SKM_ASN1_seq_unpack(SignerInfo, (buf), (len), (d2i_func), (free_func))
236 #define sk_RecipientInfo_new(st) SKM_sk_new(RecipientInfo, (st))
237 #define sk_RecipientInfo_new_null() SKM_sk_new_null(RecipientInfo)
238 #define sk_RecipientInfo_free(st) SKM_sk_free(RecipientInfo, (st))
239 #define sk_RecipientInfo_num(st) SKM_sk_num(RecipientInfo, (st))
240 #define sk_RecipientInfo_value(st, i) SKM_sk_value(RecipientInfo, (st), (i))
241 #define sk_RecipientInfo_set(st, i, val) SKM_sk_set(RecipientInfo, (st), (i), (val))
242 #define sk_RecipientInfo_zero(st) SKM_sk_zero(RecipientInfo, (st))
243 #define sk_RecipientInfo_push(st, val) SKM_sk_push(RecipientInfo, (st), (val))
244 #define sk_RecipientInfo_unshift(st, val) SKM_sk_unshift(RecipientInfo, (st), (val))
245 #define sk_RecipientInfo_find(st, val) SKM_sk_find(RecipientInfo, (st), (val))
246 #define sk_RecipientInfo_delete(st, i) SKM_sk_delete(RecipientInfo, (st), (i))
247 #define sk_RecipientInfo_delete_ptr(st, ptr) SKM_sk_delete_ptr(RecipientInfo, (st), (ptr))
248 #define sk_RecipientInfo_insert(st, val, i) SKM_sk_insert(RecipientInfo, (st), (val), (i))
249 #define sk_RecipientInfo_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(RecipientInfo, (st), (cmp))
250 #define sk_RecipientInfo_dup(st) SKM_sk_dup(RecipientInfo, st)
251 #define sk_RecipientInfo_pop_free(st, free_func) SKM_sk_pop_free(RecipientInfo, (st), (free_func))
252 #define sk_RecipientInfo_shift(st) SKM_sk_shift(RecipientInfo, (st))
253 #define sk_RecipientInfo_pop(st) SKM_sk_pop(RecipientInfo, (st))
254 #define sk_RecipientInfo_sort(st) SKM_sk_sort(RecipientInfo, (st))
255 #define sk_RecipientInfo_is_sorted(st) SKM_sk_is_sorted(RecipientInfo, (st))
257 #define d2i_ASN1_SET_OF_RecipientInfo(st, pp, length, d2i_func, free_func, ex_tag, ex_class) \
258 SKM_ASN1_SET_OF_d2i(RecipientInfo, (st), (pp), (length), (d2i_func), (free_func), (ex_tag), (ex_class))
259 #define i2d_ASN1_SET_OF_RecipientInfo(st, pp, i2d_func, ex_tag, ex_class, is_set) \
260 SKM_ASN1_SET_OF_i2d(RecipientInfo, (st), (pp), (i2d_func), (ex_tag), (ex_class), (is_set))
261 #define ASN1_seq_pack_RecipientInfo(st, i2d_func, buf, len) \
262 SKM_ASN1_seq_pack(RecipientInfo, (st), (i2d_func), (buf), (len))
263 #define ASN1_seq_unpack_RecipientInfo(buf, len, d2i_func, free_func) \
264 SKM_ASN1_seq_unpack(RecipientInfo, (buf), (len), (d2i_func), (free_func))
265 /* End of util/mkstack.pl block */
267 /* X509 Public/Private Key Pair Structure */
268 struct X509_Keypair {
269 ASN1_OCTET_STRING *keyid;
274 /* Message Digest Structure */
276 crypto_digest_t type;
281 /* Message Signature Structure */
283 SignatureData *sigData;
287 /* Encryption Session Data */
288 struct Crypto_Session {
289 CryptoData *cryptoData; /* ASN.1 Structure */
290 unsigned char *session_key; /* Private symmetric session key */
291 size_t session_key_len; /* Symmetric session key length */
294 /* Symmetric Cipher Context */
295 struct Cipher_Context {
299 /* PEM Password Dispatch Context */
300 typedef struct PEM_CB_Context {
301 CRYPTO_PEM_PASSWD_CB *pem_callback;
302 const void *pem_userdata;
306 * Extract subjectKeyIdentifier from x509 certificate.
307 * Returns: On success, an ASN1_OCTET_STRING that must be freed via M_ASN1_OCTET_STRING_free().
310 static ASN1_OCTET_STRING *openssl_cert_keyid(X509 *cert) {
312 X509V3_EXT_METHOD *method;
313 ASN1_OCTET_STRING *keyid;
315 #if (OPENSSL_VERSION_NUMBER >= 0x0090800FL)
316 const unsigned char *ext_value_data;
318 unsigned char *ext_value_data;
322 /* Find the index to the subjectKeyIdentifier extension */
323 i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
329 /* Grab the extension */
330 ext = X509_get_ext(cert, i);
332 /* Get x509 extension method structure */
333 if (!(method = X509V3_EXT_get(ext))) {
337 ext_value_data = ext->value->data;
339 #if (OPENSSL_VERSION_NUMBER > 0x00907000L)
343 /* Decode ASN1 item in data */
344 keyid = (ASN1_OCTET_STRING *) ASN1_item_d2i(NULL, &ext_value_data, ext->value->length,
345 ASN1_ITEM_ptr(method->it));
349 /* Decode ASN1 item in data */
350 keyid = (ASN1_OCTET_STRING *) method->d2i(NULL, &ext_value_data, ext->value->length);
354 keyid = (ASN1_OCTET_STRING *) method->d2i(NULL, &ext_value_data, ext->value->length);
361 * Create a new keypair object.
362 * Returns: A pointer to a X509 KEYPAIR object on success.
365 X509_KEYPAIR *crypto_keypair_new(void)
367 X509_KEYPAIR *keypair;
369 /* Allocate our keypair structure */
370 keypair = (X509_KEYPAIR *)malloc(sizeof(X509_KEYPAIR));
372 /* Initialize our keypair structure */
373 keypair->keyid = NULL;
374 keypair->pubkey = NULL;
375 keypair->privkey = NULL;
381 * Create a copy of a keypair object. The underlying
382 * EVP objects are not duplicated, as no EVP_PKEY_dup()
383 * API is available. Instead, the reference count is
386 X509_KEYPAIR *crypto_keypair_dup(X509_KEYPAIR *keypair)
388 X509_KEYPAIR *newpair;
390 newpair = crypto_keypair_new();
393 /* Allocation failed */
397 /* Increment the public key ref count */
398 if (keypair->pubkey) {
399 CRYPTO_add(&(keypair->pubkey->references), 1, CRYPTO_LOCK_EVP_PKEY);
400 newpair->pubkey = keypair->pubkey;
403 /* Increment the private key ref count */
404 if (keypair->privkey) {
405 CRYPTO_add(&(keypair->privkey->references), 1, CRYPTO_LOCK_EVP_PKEY);
406 newpair->privkey = keypair->privkey;
409 /* Duplicate the keyid */
410 if (keypair->keyid) {
411 newpair->keyid = M_ASN1_OCTET_STRING_dup(keypair->keyid);
412 if (!newpair->keyid) {
413 /* Allocation failed */
414 crypto_keypair_free(newpair);
424 * Load a public key from a PEM-encoded x509 certificate.
425 * Returns: true on success
428 int crypto_keypair_load_cert(X509_KEYPAIR *keypair, const char *file)
434 if (!(bio = BIO_new_file(file, "r"))) {
435 openssl_post_errors(M_ERROR, _("Unable to open certificate file"));
439 cert = PEM_read_bio_X509(bio, NULL, NULL, NULL);
442 openssl_post_errors(M_ERROR, _("Unable to read certificate from file"));
446 /* Extract the public key */
447 if (!(keypair->pubkey = X509_get_pubkey(cert))) {
448 openssl_post_errors(M_ERROR, _("Unable to extract public key from certificate"));
452 /* Extract the subjectKeyIdentifier extension field */
453 if ((keypair->keyid = openssl_cert_keyid(cert)) == NULL) {
454 Emsg0(M_ERROR, 0, _("Provided certificate does not include the required subjectKeyIdentifier extension."));
458 /* Validate the public key type (only RSA is supported) */
459 if (EVP_PKEY_type(keypair->pubkey->type) != EVP_PKEY_RSA) {
460 Emsg1(M_ERROR, 0, _("Unsupported key type provided: %d\n"), EVP_PKEY_type(keypair->pubkey->type));
469 if (keypair->pubkey) {
470 EVP_PKEY_free(keypair->pubkey);
475 /* Dispatch user PEM encryption callbacks */
476 static int crypto_pem_callback_dispatch (char *buf, int size, int rwflag, void *userdata)
478 PEM_CB_CONTEXT *ctx = (PEM_CB_CONTEXT *) userdata;
479 return (ctx->pem_callback(buf, size, ctx->pem_userdata));
483 * Check a PEM-encoded file
484 * for the existence of a private key.
485 * Returns: true if a private key is found
488 bool crypto_keypair_has_key(const char *file) {
492 unsigned char *data = NULL;
496 if (!(bio = BIO_new_file(file, "r"))) {
497 openssl_post_errors(M_ERROR, _("Unable to open private key file"));
501 while (PEM_read_bio(bio, &name, &header, &data, &len)) {
502 /* We don't care what the data is, just that it's there */
503 OPENSSL_free(header);
507 * PEM Header Found, check for a private key
508 * Due to OpenSSL limitations, we must specifically
509 * list supported PEM private key encodings.
511 if (strcmp(name, PEM_STRING_RSA) == 0
512 || strcmp(name, PEM_STRING_DSA) == 0
513 || strcmp(name, PEM_STRING_PKCS8) == 0
514 || strcmp(name, PEM_STRING_PKCS8INF) == 0) {
526 /* Post PEM-decoding error messages, if any */
527 openssl_post_errors(M_ERROR, _("Unable to read private key from file"));
532 * Load a PEM-encoded private key.
533 * Returns: true on success
536 int crypto_keypair_load_key(X509_KEYPAIR *keypair, const char *file,
537 CRYPTO_PEM_PASSWD_CB *pem_callback,
538 const void *pem_userdata)
544 if (!(bio = BIO_new_file(file, "r"))) {
545 openssl_post_errors(M_ERROR, _("Unable to open private key file"));
549 /* Set up PEM encryption callback */
551 ctx.pem_callback = pem_callback;
552 ctx.pem_userdata = pem_userdata;
554 ctx.pem_callback = crypto_default_pem_callback;
555 ctx.pem_userdata = NULL;
558 keypair->privkey = PEM_read_bio_PrivateKey(bio, NULL, crypto_pem_callback_dispatch, &ctx);
560 if (!keypair->privkey) {
561 openssl_post_errors(M_ERROR, _("Unable to read private key from file"));
569 * Free memory associated with a keypair object.
571 void crypto_keypair_free(X509_KEYPAIR *keypair)
573 if (keypair->pubkey) {
574 EVP_PKEY_free(keypair->pubkey);
576 if (keypair->privkey) {
577 EVP_PKEY_free(keypair->privkey);
579 if (keypair->keyid) {
580 M_ASN1_OCTET_STRING_free(keypair->keyid);
586 * Create a new message digest context of the specified type
587 * Returns: A pointer to a DIGEST object on success.
590 DIGEST *crypto_digest_new(JCR *jcr, crypto_digest_t type)
593 const EVP_MD *md = NULL; /* Quell invalid uninitialized warnings */
595 digest = (DIGEST *)malloc(sizeof(DIGEST));
598 Dmsg1(50, "crypto_digest_new jcr=%p\n", jcr);
600 /* Initialize the OpenSSL message digest context */
601 EVP_MD_CTX_init(&digest->ctx);
603 /* Determine the correct OpenSSL message digest type */
605 case CRYPTO_DIGEST_MD5:
608 case CRYPTO_DIGEST_SHA1:
612 case CRYPTO_DIGEST_SHA256:
615 case CRYPTO_DIGEST_SHA512:
620 Jmsg1(jcr, M_ERROR, 0, _("Unsupported digest type: %d\n"), type);
624 /* Initialize the backing OpenSSL context */
625 if (EVP_DigestInit_ex(&digest->ctx, md, NULL) == 0) {
632 /* This should not happen, but never say never ... */
633 Dmsg0(50, "Digest init failed.\n");
634 openssl_post_errors(jcr, M_ERROR, _("OpenSSL digest initialization failed"));
635 crypto_digest_free(digest);
640 * Hash length bytes of data into the provided digest context.
641 * Returns: true on success
644 bool crypto_digest_update(DIGEST *digest, const uint8_t *data, uint32_t length)
646 if (EVP_DigestUpdate(&digest->ctx, data, length) == 0) {
647 Dmsg0(50, "digest update failed\n");
648 openssl_post_errors(digest->jcr, M_ERROR, _("OpenSSL digest update failed"));
656 * Finalize the data in digest, storing the result in dest and the result size
657 * in length. The result size can be determined with crypto_digest_size().
659 * Returns: true on success
662 bool crypto_digest_finalize(DIGEST *digest, uint8_t *dest, uint32_t *length)
664 if (!EVP_DigestFinal(&digest->ctx, dest, (unsigned int *)length)) {
665 Dmsg0(50, "digest finalize failed\n");
666 openssl_post_errors(digest->jcr, M_ERROR, _("OpenSSL digest finalize failed"));
674 * Free memory associated with a digest object.
676 void crypto_digest_free(DIGEST *digest)
678 EVP_MD_CTX_cleanup(&digest->ctx);
683 * Create a new message signature context.
684 * Returns: A pointer to a SIGNATURE object on success.
687 SIGNATURE *crypto_sign_new(JCR *jcr)
691 sig = (SIGNATURE *)malloc(sizeof(SIGNATURE));
696 sig->sigData = SignatureData_new();
698 Dmsg1(50, "crypto_sign_new jcr=%p\n", jcr);
701 /* Allocation failed in OpenSSL */
706 /* Set the ASN.1 structure version number */
707 ASN1_INTEGER_set(sig->sigData->version, BACULA_ASN1_VERSION);
713 * For a given public key, find the associated SignatureInfo record
714 * and create a digest context for signature validation
715 * Returns: CRYPTO_ERROR_NONE on success, with the newly allocated DIGEST in digest.
716 * A crypto_error_t value on failure.
718 crypto_error_t crypto_sign_get_digest(SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST **digest)
720 STACK_OF(SignerInfo) *signers;
724 signers = sig->sigData->signerInfo;
726 for (i = 0; i < sk_SignerInfo_num(signers); i++) {
727 si = sk_SignerInfo_value(signers, i);
728 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, si->subjectKeyIdentifier) == 0) {
729 /* Get the digest algorithm and allocate a digest context */
730 Dmsg1(50, "crypto_sign_get_digest jcr=%p\n", sig->jcr);
731 switch (OBJ_obj2nid(si->digestAlgorithm)) {
733 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_MD5);
736 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA1);
740 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA256);
743 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA512);
748 return CRYPTO_ERROR_INVALID_DIGEST;
751 /* Shouldn't happen */
752 if (*digest == NULL) {
753 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest_new failed"));
754 return CRYPTO_ERROR_INVALID_DIGEST;
756 return CRYPTO_ERROR_NONE;
759 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL sign get digest failed"));
764 return CRYPTO_ERROR_NOSIGNER;
768 * For a given signature, public key, and digest, verify the SIGNATURE.
769 * Returns: CRYPTO_ERROR_NONE on success.
770 * A crypto_error_t value on failure.
772 crypto_error_t crypto_sign_verify(SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST *digest)
774 STACK_OF(SignerInfo) *signers;
778 #if (OPENSSL_VERSION_NUMBER >= 0x0090800FL)
779 const unsigned char *sigData;
781 unsigned char *sigData;
784 signers = sig->sigData->signerInfo;
786 /* Find the signer */
787 for (i = 0; i < sk_SignerInfo_num(signers); i++) {
788 si = sk_SignerInfo_value(signers, i);
789 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, si->subjectKeyIdentifier) == 0) {
790 /* Extract the signature data */
791 sigLen = M_ASN1_STRING_length(si->signature);
792 sigData = M_ASN1_STRING_data(si->signature);
794 ok = EVP_VerifyFinal(&digest->ctx, sigData, sigLen, keypair->pubkey);
796 return CRYPTO_ERROR_NONE;
797 } else if (ok == 0) {
798 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest Verify final failed"));
799 return CRYPTO_ERROR_BAD_SIGNATURE;
801 /* Shouldn't happen */
802 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest Verify final failed"));
803 return CRYPTO_ERROR_INTERNAL;
807 Jmsg(sig->jcr, M_ERROR, 0, _("No signers found for crypto verify.\n"));
808 /* Signer wasn't found. */
809 return CRYPTO_ERROR_NOSIGNER;
815 * Returns: true on success
818 int crypto_sign_add_signer(SIGNATURE *sig, DIGEST *digest, X509_KEYPAIR *keypair)
820 SignerInfo *si = NULL;
821 unsigned char *buf = NULL;
824 si = SignerInfo_new();
827 /* Allocation failed in OpenSSL */
831 /* Set the ASN.1 structure version number */
832 ASN1_INTEGER_set(si->version, BACULA_ASN1_VERSION);
834 /* Set the digest algorithm identifier */
835 switch (digest->type) {
836 case CRYPTO_DIGEST_MD5:
837 si->digestAlgorithm = OBJ_nid2obj(NID_md5);
839 case CRYPTO_DIGEST_SHA1:
840 si->digestAlgorithm = OBJ_nid2obj(NID_sha1);
843 case CRYPTO_DIGEST_SHA256:
844 si->digestAlgorithm = OBJ_nid2obj(NID_sha256);
846 case CRYPTO_DIGEST_SHA512:
847 si->digestAlgorithm = OBJ_nid2obj(NID_sha512);
851 /* This should never happen */
855 /* Drop the string allocated by OpenSSL, and add our subjectKeyIdentifier */
856 M_ASN1_OCTET_STRING_free(si->subjectKeyIdentifier);
857 si->subjectKeyIdentifier = M_ASN1_OCTET_STRING_dup(keypair->keyid);
859 /* Set our signature algorithm. We currently require RSA */
860 assert(EVP_PKEY_type(keypair->pubkey->type) == EVP_PKEY_RSA);
861 /* This is slightly evil. Reach into the MD structure and grab the key type */
862 si->signatureAlgorithm = OBJ_nid2obj(digest->ctx.digest->pkey_type);
864 /* Finalize/Sign our Digest */
865 len = EVP_PKEY_size(keypair->privkey);
866 buf = (unsigned char *) malloc(len);
867 if (!EVP_SignFinal(&digest->ctx, buf, &len, keypair->privkey)) {
868 openssl_post_errors(M_ERROR, _("Signature creation failed"));
872 /* Add the signature to the SignerInfo structure */
873 if (!M_ASN1_OCTET_STRING_set(si->signature, buf, len)) {
874 /* Allocation failed in OpenSSL */
878 /* No longer needed */
881 /* Push the new SignerInfo structure onto the stack */
882 sk_SignerInfo_push(sig->sigData->signerInfo, si);
898 * Encodes the SignatureData structure. The length argument is used to specify the
899 * size of dest. A length of 0 will cause no data to be written to dest, and the
900 * required length to be written to length. The caller can then allocate sufficient
901 * space for the output.
903 * Returns: true on success, stores the encoded data in dest, and the size in length.
906 int crypto_sign_encode(SIGNATURE *sig, uint8_t *dest, uint32_t *length)
909 *length = i2d_SignatureData(sig->sigData, NULL);
913 *length = i2d_SignatureData(sig->sigData, (unsigned char **)&dest);
918 * Decodes the SignatureData structure. The length argument is used to specify the
921 * Returns: SIGNATURE instance on success.
926 SIGNATURE *crypto_sign_decode(JCR *jcr, const uint8_t *sigData, uint32_t length)
929 #if (OPENSSL_VERSION_NUMBER >= 0x0090800FL)
930 const unsigned char *p = (const unsigned char *) sigData;
932 unsigned char *p = (unsigned char *)sigData;
935 sig = (SIGNATURE *)malloc(sizeof(SIGNATURE));
941 /* d2i_SignatureData modifies the supplied pointer */
942 sig->sigData = d2i_SignatureData(NULL, &p, length);
945 /* Allocation / Decoding failed in OpenSSL */
946 openssl_post_errors(jcr, M_ERROR, _("Signature decoding failed"));
955 * Free memory associated with a signature object.
957 void crypto_sign_free(SIGNATURE *sig)
959 SignatureData_free(sig->sigData);
964 * Create a new encryption session.
965 * Returns: A pointer to a CRYPTO_SESSION object on success.
968 * Note! Bacula malloc() fails if out of memory.
970 CRYPTO_SESSION *crypto_session_new (crypto_cipher_t cipher, alist *pubkeys)
973 X509_KEYPAIR *keypair;
974 const EVP_CIPHER *ec;
978 /* Allocate our session description structures */
979 cs = (CRYPTO_SESSION *)malloc(sizeof(CRYPTO_SESSION));
981 /* Initialize required fields */
982 cs->session_key = NULL;
984 /* Allocate a CryptoData structure */
985 cs->cryptoData = CryptoData_new();
987 if (!cs->cryptoData) {
988 /* Allocation failed in OpenSSL */
993 /* Set the ASN.1 structure version number */
994 ASN1_INTEGER_set(cs->cryptoData->version, BACULA_ASN1_VERSION);
997 * Acquire a cipher instance and set the ASN.1 cipher NID
1000 case CRYPTO_CIPHER_AES_128_CBC:
1001 /* AES 128 bit CBC */
1002 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_aes_128_cbc);
1003 ec = EVP_aes_128_cbc();
1006 case CRYPTO_CIPHER_AES_192_CBC:
1007 /* AES 192 bit CBC */
1008 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_aes_192_cbc);
1009 ec = EVP_aes_192_cbc();
1011 case CRYPTO_CIPHER_AES_256_CBC:
1012 /* AES 256 bit CBC */
1013 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_aes_256_cbc);
1014 ec = EVP_aes_256_cbc();
1017 case CRYPTO_CIPHER_BLOWFISH_CBC:
1019 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_bf_cbc);
1023 Emsg0(M_ERROR, 0, _("Unsupported cipher type specified\n"));
1024 crypto_session_free(cs);
1028 /* Generate a symmetric session key */
1029 cs->session_key_len = EVP_CIPHER_key_length(ec);
1030 cs->session_key = (unsigned char *) malloc(cs->session_key_len);
1031 if (RAND_bytes(cs->session_key, cs->session_key_len) <= 0) {
1032 /* OpenSSL failure */
1033 crypto_session_free(cs);
1037 /* Generate an IV if possible */
1038 if ((iv_len = EVP_CIPHER_iv_length(ec))) {
1039 iv = (unsigned char *)malloc(iv_len);
1041 /* Generate random IV */
1042 if (RAND_bytes(iv, iv_len) <= 0) {
1043 /* OpenSSL failure */
1044 crypto_session_free(cs);
1049 /* Store it in our ASN.1 structure */
1050 if (!M_ASN1_OCTET_STRING_set(cs->cryptoData->iv, iv, iv_len)) {
1051 /* Allocation failed in OpenSSL */
1052 crypto_session_free(cs);
1060 * Create RecipientInfo structures for supplied
1063 foreach_alist(keypair, pubkeys) {
1065 unsigned char *ekey;
1068 ri = RecipientInfo_new();
1070 /* Allocation failed in OpenSSL */
1071 crypto_session_free(cs);
1075 /* Set the ASN.1 structure version number */
1076 ASN1_INTEGER_set(ri->version, BACULA_ASN1_VERSION);
1078 /* Drop the string allocated by OpenSSL, and add our subjectKeyIdentifier */
1079 M_ASN1_OCTET_STRING_free(ri->subjectKeyIdentifier);
1080 ri->subjectKeyIdentifier = M_ASN1_OCTET_STRING_dup(keypair->keyid);
1082 /* Set our key encryption algorithm. We currently require RSA */
1083 assert(keypair->pubkey && EVP_PKEY_type(keypair->pubkey->type) == EVP_PKEY_RSA);
1084 ri->keyEncryptionAlgorithm = OBJ_nid2obj(NID_rsaEncryption);
1086 /* Encrypt the session key */
1087 ekey = (unsigned char *)malloc(EVP_PKEY_size(keypair->pubkey));
1089 if ((ekey_len = EVP_PKEY_encrypt(ekey, cs->session_key, cs->session_key_len, keypair->pubkey)) <= 0) {
1090 /* OpenSSL failure */
1091 RecipientInfo_free(ri);
1092 crypto_session_free(cs);
1097 /* Store it in our ASN.1 structure */
1098 if (!M_ASN1_OCTET_STRING_set(ri->encryptedKey, ekey, ekey_len)) {
1099 /* Allocation failed in OpenSSL */
1100 RecipientInfo_free(ri);
1101 crypto_session_free(cs);
1106 /* Free the encrypted key buffer */
1109 /* Push the new RecipientInfo structure onto the stack */
1110 sk_RecipientInfo_push(cs->cryptoData->recipientInfo, ri);
1117 * Encodes the CryptoData structure. The length argument is used to specify the
1118 * size of dest. A length of 0 will cause no data to be written to dest, and the
1119 * required length to be written to length. The caller can then allocate sufficient
1120 * space for the output.
1122 * Returns: true on success, stores the encoded data in dest, and the size in length.
1125 bool crypto_session_encode(CRYPTO_SESSION *cs, uint8_t *dest, uint32_t *length)
1128 *length = i2d_CryptoData(cs->cryptoData, NULL);
1132 *length = i2d_CryptoData(cs->cryptoData, &dest);
1137 * Decodes the CryptoData structure. The length argument is
1138 * used to specify the size of data.
1140 * Returns: CRYPTO_SESSION instance on success.
1142 * Returns: CRYPTO_ERROR_NONE and a pointer to a newly allocated CRYPTO_SESSION structure in *session on success.
1143 * A crypto_error_t value on failure.
1145 crypto_error_t crypto_session_decode(const uint8_t *data, uint32_t length, alist *keypairs, CRYPTO_SESSION **session)
1148 X509_KEYPAIR *keypair;
1149 STACK_OF(RecipientInfo) *recipients;
1150 crypto_error_t retval = CRYPTO_ERROR_NONE;
1151 #if (OPENSSL_VERSION_NUMBER >= 0x0090800FL)
1152 const unsigned char *p = (const unsigned char *)data;
1154 unsigned char *p = (unsigned char *)data;
1157 /* bacula-fd.conf doesn't contains any key */
1159 return CRYPTO_ERROR_NORECIPIENT;
1162 cs = (CRYPTO_SESSION *)malloc(sizeof(CRYPTO_SESSION));
1164 /* Initialize required fields */
1165 cs->session_key = NULL;
1167 /* d2i_CryptoData modifies the supplied pointer */
1168 cs->cryptoData = d2i_CryptoData(NULL, &p, length);
1170 if (!cs->cryptoData) {
1171 /* Allocation / Decoding failed in OpenSSL */
1172 openssl_post_errors(M_ERROR, _("CryptoData decoding failed"));
1173 retval = CRYPTO_ERROR_INTERNAL;
1177 recipients = cs->cryptoData->recipientInfo;
1180 * Find a matching RecipientInfo structure for a supplied
1183 foreach_alist(keypair, keypairs) {
1187 /* Private key available? */
1188 if (keypair->privkey == NULL) {
1192 for (i = 0; i < sk_RecipientInfo_num(recipients); i++) {
1193 ri = sk_RecipientInfo_value(recipients, i);
1195 /* Match against the subjectKeyIdentifier */
1196 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, ri->subjectKeyIdentifier) == 0) {
1197 /* Match found, extract symmetric encryption session data */
1199 /* RSA is required. */
1200 assert(EVP_PKEY_type(keypair->privkey->type) == EVP_PKEY_RSA);
1202 /* If we recieve a RecipientInfo structure that does not use
1203 * RSA, return an error */
1204 if (OBJ_obj2nid(ri->keyEncryptionAlgorithm) != NID_rsaEncryption) {
1205 retval = CRYPTO_ERROR_INVALID_CRYPTO;
1209 /* Decrypt the session key */
1210 /* Allocate sufficient space for the largest possible decrypted data */
1211 cs->session_key = (unsigned char *)malloc(EVP_PKEY_size(keypair->privkey));
1212 cs->session_key_len = EVP_PKEY_decrypt(cs->session_key, M_ASN1_STRING_data(ri->encryptedKey),
1213 M_ASN1_STRING_length(ri->encryptedKey), keypair->privkey);
1215 if (cs->session_key_len <= 0) {
1216 openssl_post_errors(M_ERROR, _("Failure decrypting the session key"));
1217 retval = CRYPTO_ERROR_DECRYPTION;
1221 /* Session key successfully extracted, return the CRYPTO_SESSION structure */
1223 return CRYPTO_ERROR_NONE;
1228 /* No matching recipient found */
1229 return CRYPTO_ERROR_NORECIPIENT;
1232 crypto_session_free(cs);
1237 * Free memory associated with a crypto session object.
1239 void crypto_session_free(CRYPTO_SESSION *cs)
1241 if (cs->cryptoData) {
1242 CryptoData_free(cs->cryptoData);
1244 if (cs->session_key){
1245 free(cs->session_key);
1251 * Create a new crypto cipher context with the specified session object
1252 * Returns: A pointer to a CIPHER_CONTEXT object on success. The cipher block size is returned in blocksize.
1255 CIPHER_CONTEXT *crypto_cipher_new(CRYPTO_SESSION *cs, bool encrypt, uint32_t *blocksize)
1257 CIPHER_CONTEXT *cipher_ctx;
1258 const EVP_CIPHER *ec;
1260 cipher_ctx = (CIPHER_CONTEXT *)malloc(sizeof(CIPHER_CONTEXT));
1263 * Acquire a cipher instance for the given ASN.1 cipher NID
1265 if ((ec = EVP_get_cipherbyobj(cs->cryptoData->contentEncryptionAlgorithm)) == NULL) {
1266 Emsg1(M_ERROR, 0, _("Unsupported contentEncryptionAlgorithm: %d\n"), OBJ_obj2nid(cs->cryptoData->contentEncryptionAlgorithm));
1271 /* Initialize the OpenSSL cipher context */
1272 EVP_CIPHER_CTX_init(&cipher_ctx->ctx);
1274 /* Initialize for encryption */
1275 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, ec, NULL, NULL, NULL, 1)) {
1276 openssl_post_errors(M_ERROR, _("OpenSSL cipher context initialization failed"));
1280 /* Initialize for decryption */
1281 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, ec, NULL, NULL, NULL, 0)) {
1282 openssl_post_errors(M_ERROR, _("OpenSSL cipher context initialization failed"));
1287 /* Set the key size */
1288 if (!EVP_CIPHER_CTX_set_key_length(&cipher_ctx->ctx, cs->session_key_len)) {
1289 openssl_post_errors(M_ERROR, _("Encryption session provided an invalid symmetric key"));
1293 /* Validate the IV length */
1294 if (EVP_CIPHER_iv_length(ec) != M_ASN1_STRING_length(cs->cryptoData->iv)) {
1295 openssl_post_errors(M_ERROR, _("Encryption session provided an invalid IV"));
1299 /* Add the key and IV to the cipher context */
1300 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, NULL, NULL, cs->session_key, M_ASN1_STRING_data(cs->cryptoData->iv), -1)) {
1301 openssl_post_errors(M_ERROR, _("OpenSSL cipher context key/IV initialization failed"));
1305 *blocksize = EVP_CIPHER_CTX_block_size(&cipher_ctx->ctx);
1309 crypto_cipher_free(cipher_ctx);
1315 * Encrypt/Decrypt length bytes of data using the provided cipher context
1316 * Returns: true on success, number of bytes output in written
1319 bool crypto_cipher_update(CIPHER_CONTEXT *cipher_ctx, const uint8_t *data, uint32_t length, const uint8_t *dest, uint32_t *written)
1321 if (!EVP_CipherUpdate(&cipher_ctx->ctx, (unsigned char *)dest, (int *)written, (const unsigned char *)data, length)) {
1322 /* This really shouldn't fail */
1330 * Finalize the cipher context, writing any remaining data and necessary padding
1331 * to dest, and the size in written.
1332 * The result size will either be one block of data or zero.
1334 * Returns: true on success
1337 bool crypto_cipher_finalize (CIPHER_CONTEXT *cipher_ctx, uint8_t *dest, uint32_t *written)
1339 if (!EVP_CipherFinal_ex(&cipher_ctx->ctx, (unsigned char *)dest, (int *) written)) {
1340 /* This really shouldn't fail */
1349 * Free memory associated with a cipher context.
1351 void crypto_cipher_free (CIPHER_CONTEXT *cipher_ctx)
1353 EVP_CIPHER_CTX_cleanup(&cipher_ctx->ctx);
1359 * Perform global initialization of OpenSSL
1360 * This function is not thread safe.
1361 * Returns: 0 on success
1364 int init_crypto (void)
1368 if ((stat = openssl_init_threads()) != 0) {
1369 Emsg1(M_ABORT, 0, _("Unable to init OpenSSL threading: ERR=%s\n"), strerror(stat));
1372 /* Load libssl and libcrypto human-readable error strings */
1373 SSL_load_error_strings();
1375 /* Initialize OpenSSL SSL library */
1378 /* Register OpenSSL ciphers and digests */
1379 OpenSSL_add_all_algorithms();
1381 if (!openssl_seed_prng()) {
1382 Emsg0(M_ERROR_TERM, 0, _("Failed to seed OpenSSL PRNG\n"));
1385 crypto_initialized = true;
1391 * Perform global cleanup of OpenSSL
1392 * All cryptographic operations must be completed before calling this function.
1393 * This function is not thread safe.
1394 * Returns: 0 on success
1397 int cleanup_crypto (void)
1400 * Ensure that we've actually been initialized; Doing this here decreases the
1401 * complexity of client's termination/cleanup code.
1403 if (!crypto_initialized) {
1407 if (!openssl_save_prng()) {
1408 Emsg0(M_ERROR, 0, _("Failed to save OpenSSL PRNG\n"));
1411 openssl_cleanup_threads();
1413 /* Free libssl and libcrypto error strings */
1416 /* Free all ciphers and digests */
1419 /* Free memory used by PRNG */
1422 crypto_initialized = false;
1428 #else /* HAVE_OPENSSL */
1429 # error No encryption library available
1430 #endif /* HAVE_OPENSSL */
1432 #else /* HAVE_CRYPTO */
1435 * Cryptography Support Disabled
1438 /* Message Digest Structure */
1440 crypto_digest_t type;
1448 /* Dummy Signature Structure */
1453 DIGEST *crypto_digest_new(JCR *jcr, crypto_digest_t type)
1457 digest = (DIGEST *)malloc(sizeof(DIGEST));
1458 digest->type = type;
1462 case CRYPTO_DIGEST_MD5:
1463 MD5Init(&digest->md5);
1465 case CRYPTO_DIGEST_SHA1:
1466 SHA1Init(&digest->sha1);
1469 Jmsg1(jcr, M_ERROR, 0, _("Unsupported digest type=%d specified\n"), type);
1477 bool crypto_digest_update(DIGEST *digest, const uint8_t *data, uint32_t length)
1479 switch (digest->type) {
1480 case CRYPTO_DIGEST_MD5:
1481 /* Doesn't return anything ... */
1482 MD5Update(&digest->md5, (unsigned char *) data, length);
1484 case CRYPTO_DIGEST_SHA1:
1486 if ((ret = SHA1Update(&digest->sha1, (const u_int8_t *) data, length)) == shaSuccess) {
1489 Emsg1(M_ERROR, 0, _("SHA1Update() returned an error: %d\n"), ret);
1498 bool crypto_digest_finalize(DIGEST *digest, uint8_t *dest, uint32_t *length)
1500 switch (digest->type) {
1501 case CRYPTO_DIGEST_MD5:
1502 /* Guard against programmer error by either the API client or
1503 * an out-of-sync CRYPTO_DIGEST_MAX_SIZE */
1504 assert(*length >= CRYPTO_DIGEST_MD5_SIZE);
1505 *length = CRYPTO_DIGEST_MD5_SIZE;
1506 /* Doesn't return anything ... */
1507 MD5Final((unsigned char *)dest, &digest->md5);
1509 case CRYPTO_DIGEST_SHA1:
1510 /* Guard against programmer error by either the API client or
1511 * an out-of-sync CRYPTO_DIGEST_MAX_SIZE */
1512 assert(*length >= CRYPTO_DIGEST_SHA1_SIZE);
1513 *length = CRYPTO_DIGEST_SHA1_SIZE;
1514 if (SHA1Final(&digest->sha1, (u_int8_t *) dest) == shaSuccess) {
1527 void crypto_digest_free(DIGEST *digest)
1532 /* Dummy routines */
1533 int init_crypto (void) { return 0; }
1534 int cleanup_crypto (void) { return 0; }
1536 SIGNATURE *crypto_sign_new(JCR *jcr) { return NULL; }
1538 crypto_error_t crypto_sign_get_digest (SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST **digest) { return CRYPTO_ERROR_INTERNAL; }
1539 crypto_error_t crypto_sign_verify (SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST *digest) { return CRYPTO_ERROR_INTERNAL; }
1541 int crypto_sign_add_signer (SIGNATURE *sig, DIGEST *digest, X509_KEYPAIR *keypair) { return false; }
1542 int crypto_sign_encode (SIGNATURE *sig, uint8_t *dest, uint32_t *length) { return false; }
1544 SIGNATURE *crypto_sign_decode (JCR *jcr, const uint8_t *sigData, uint32_t length) { return NULL; }
1545 void crypto_sign_free (SIGNATURE *sig) { }
1548 X509_KEYPAIR *crypto_keypair_new(void) { return NULL; }
1549 X509_KEYPAIR *crypto_keypair_dup (X509_KEYPAIR *keypair) { return NULL; }
1550 int crypto_keypair_load_cert (X509_KEYPAIR *keypair, const char *file) { return false; }
1551 bool crypto_keypair_has_key (const char *file) { return false; }
1552 int crypto_keypair_load_key (X509_KEYPAIR *keypair, const char *file, CRYPTO_PEM_PASSWD_CB *pem_callback, const void *pem_userdata) { return false; }
1553 void crypto_keypair_free (X509_KEYPAIR *keypair) { }
1555 CRYPTO_SESSION *crypto_session_new (crypto_cipher_t cipher, alist *pubkeys) { return NULL; }
1556 void crypto_session_free (CRYPTO_SESSION *cs) { }
1557 bool crypto_session_encode (CRYPTO_SESSION *cs, uint8_t *dest, uint32_t *length) { return false; }
1558 crypto_error_t crypto_session_decode(const uint8_t *data, uint32_t length, alist *keypairs, CRYPTO_SESSION **session) { return CRYPTO_ERROR_INTERNAL; }
1560 CIPHER_CONTEXT *crypto_cipher_new (CRYPTO_SESSION *cs, bool encrypt, uint32_t *blocksize) { return NULL; }
1561 bool crypto_cipher_update (CIPHER_CONTEXT *cipher_ctx, const uint8_t *data, uint32_t length, const uint8_t *dest, uint32_t *written) { return false; }
1562 bool crypto_cipher_finalize (CIPHER_CONTEXT *cipher_ctx, uint8_t *dest, uint32_t *written) { return false; }
1563 void crypto_cipher_free (CIPHER_CONTEXT *cipher_ctx) { }
1565 #endif /* HAVE_CRYPTO */
1570 * Default PEM encryption passphrase callback.
1571 * Returns an empty password.
1573 int crypto_default_pem_callback(char *buf, int size, const void *userdata)
1575 bstrncpy(buf, "", size);
1576 return (strlen(buf));
1580 * Returns the ASCII name of the digest type.
1581 * Returns: ASCII name of digest type.
1583 const char *crypto_digest_name(DIGEST *digest)
1585 switch (digest->type) {
1586 case CRYPTO_DIGEST_MD5:
1588 case CRYPTO_DIGEST_SHA1:
1590 case CRYPTO_DIGEST_SHA256:
1592 case CRYPTO_DIGEST_SHA512:
1594 case CRYPTO_DIGEST_NONE:
1597 return "Invalid Digest Type";
1603 * Given a stream type, returns the associated
1604 * crypto_digest_t value.
1606 crypto_digest_t crypto_digest_stream_type(int stream)
1609 case STREAM_MD5_DIGEST:
1610 return CRYPTO_DIGEST_MD5;
1611 case STREAM_SHA1_DIGEST:
1612 return CRYPTO_DIGEST_SHA1;
1613 case STREAM_SHA256_DIGEST:
1614 return CRYPTO_DIGEST_SHA256;
1615 case STREAM_SHA512_DIGEST:
1616 return CRYPTO_DIGEST_SHA512;
1618 return CRYPTO_DIGEST_NONE;
1623 * * Given a crypto_error_t value, return the associated
1626 const char *crypto_strerror(crypto_error_t error) {
1628 case CRYPTO_ERROR_NONE:
1629 return _("No error");
1630 case CRYPTO_ERROR_NOSIGNER:
1631 return _("Signer not found");
1632 case CRYPTO_ERROR_NORECIPIENT:
1633 return _("Recipient not found");
1634 case CRYPTO_ERROR_INVALID_DIGEST:
1635 return _("Unsupported digest algorithm");
1636 case CRYPTO_ERROR_INVALID_CRYPTO:
1637 return _("Unsupported encryption algorithm");
1638 case CRYPTO_ERROR_BAD_SIGNATURE:
1639 return _("Signature is invalid");
1640 case CRYPTO_ERROR_DECRYPTION:
1641 return _("Decryption error");
1642 case CRYPTO_ERROR_INTERNAL:
1643 /* This shouldn't happen */
1644 return _("Internal error");
1646 return _("Unknown error");