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) {
366 X509_KEYPAIR *keypair;
368 /* Allocate our keypair structure */
369 keypair = (X509_KEYPAIR *) malloc(sizeof(X509_KEYPAIR));
374 /* Initialize our keypair structure */
375 keypair->keyid = NULL;
376 keypair->pubkey = NULL;
377 keypair->privkey = NULL;
383 * Create a copy of a keypair object. The underlying
384 * EVP objects are not duplicated, as no EVP_PKEY_dup()
385 * API is available. Instead, the reference count is
388 X509_KEYPAIR *crypto_keypair_dup(X509_KEYPAIR *keypair)
390 X509_KEYPAIR *newpair;
392 newpair = crypto_keypair_new();
395 /* Allocation failed */
399 /* Increment the public key ref count */
400 if (keypair->pubkey) {
401 CRYPTO_add(&(keypair->pubkey->references), 1, CRYPTO_LOCK_EVP_PKEY);
402 newpair->pubkey = keypair->pubkey;
405 /* Increment the private key ref count */
406 if (keypair->privkey) {
407 CRYPTO_add(&(keypair->privkey->references), 1, CRYPTO_LOCK_EVP_PKEY);
408 newpair->privkey = keypair->privkey;
411 /* Duplicate the keyid */
412 if (keypair->keyid) {
413 newpair->keyid = M_ASN1_OCTET_STRING_dup(keypair->keyid);
414 if (!newpair->keyid) {
415 /* Allocation failed */
416 crypto_keypair_free(newpair);
426 * Load a public key from a PEM-encoded x509 certificate.
427 * Returns: true on success
430 int crypto_keypair_load_cert(X509_KEYPAIR *keypair, const char *file)
436 if (!(bio = BIO_new_file(file, "r"))) {
437 openssl_post_errors(M_ERROR, _("Unable to open certificate file"));
441 cert = PEM_read_bio_X509(bio, NULL, NULL, NULL);
444 openssl_post_errors(M_ERROR, _("Unable to read certificate from file"));
448 /* Extract the public key */
449 if (!(keypair->pubkey = X509_get_pubkey(cert))) {
450 openssl_post_errors(M_ERROR, _("Unable to extract public key from certificate"));
454 /* Extract the subjectKeyIdentifier extension field */
455 if ((keypair->keyid = openssl_cert_keyid(cert)) == NULL) {
456 Emsg0(M_ERROR, 0, _("Provided certificate does not include the required subjectKeyIdentifier extension."));
460 /* Validate the public key type (only RSA is supported) */
461 if (EVP_PKEY_type(keypair->pubkey->type) != EVP_PKEY_RSA) {
462 Emsg1(M_ERROR, 0, _("Unsupported key type provided: %d\n"), EVP_PKEY_type(keypair->pubkey->type));
471 if (keypair->pubkey) {
472 EVP_PKEY_free(keypair->pubkey);
477 /* Dispatch user PEM encryption callbacks */
478 static int crypto_pem_callback_dispatch (char *buf, int size, int rwflag, void *userdata)
480 PEM_CB_CONTEXT *ctx = (PEM_CB_CONTEXT *) userdata;
481 return (ctx->pem_callback(buf, size, ctx->pem_userdata));
485 * Check a PEM-encoded file
486 * for the existence of a private key.
487 * Returns: true if a private key is found
490 bool crypto_keypair_has_key(const char *file) {
494 unsigned char *data = NULL;
498 if (!(bio = BIO_new_file(file, "r"))) {
499 openssl_post_errors(M_ERROR, _("Unable to open private key file"));
503 while (PEM_read_bio(bio, &name, &header, &data, &len)) {
504 /* We don't care what the data is, just that it's there */
505 OPENSSL_free(header);
509 * PEM Header Found, check for a private key
510 * Due to OpenSSL limitations, we must specifically
511 * list supported PEM private key encodings.
513 if (strcmp(name, PEM_STRING_RSA) == 0
514 || strcmp(name, PEM_STRING_DSA) == 0
515 || strcmp(name, PEM_STRING_PKCS8) == 0
516 || strcmp(name, PEM_STRING_PKCS8INF) == 0) {
528 /* Post PEM-decoding error messages, if any */
529 openssl_post_errors(M_ERROR, _("Unable to read private key from file"));
534 * Load a PEM-encoded private key.
535 * Returns: true on success
538 int crypto_keypair_load_key(X509_KEYPAIR *keypair, const char *file,
539 CRYPTO_PEM_PASSWD_CB *pem_callback,
540 const void *pem_userdata)
546 if (!(bio = BIO_new_file(file, "r"))) {
547 openssl_post_errors(M_ERROR, _("Unable to open private key file"));
551 /* Set up PEM encryption callback */
553 ctx.pem_callback = pem_callback;
554 ctx.pem_userdata = pem_userdata;
556 ctx.pem_callback = crypto_default_pem_callback;
557 ctx.pem_userdata = NULL;
560 keypair->privkey = PEM_read_bio_PrivateKey(bio, NULL, crypto_pem_callback_dispatch, &ctx);
562 if (!keypair->privkey) {
563 openssl_post_errors(M_ERROR, _("Unable to read private key from file"));
571 * Free memory associated with a keypair object.
573 void crypto_keypair_free(X509_KEYPAIR *keypair)
575 if (keypair->pubkey) {
576 EVP_PKEY_free(keypair->pubkey);
578 if (keypair->privkey) {
579 EVP_PKEY_free(keypair->privkey);
581 if (keypair->keyid) {
582 M_ASN1_OCTET_STRING_free(keypair->keyid);
588 * Create a new message digest context of the specified type
589 * Returns: A pointer to a DIGEST object on success.
592 DIGEST *crypto_digest_new(JCR *jcr, crypto_digest_t type)
595 const EVP_MD *md = NULL; /* Quell invalid uninitialized warnings */
597 digest = (DIGEST *)malloc(sizeof(DIGEST));
601 /* Initialize the OpenSSL message digest context */
602 EVP_MD_CTX_init(&digest->ctx);
604 /* Determine the correct OpenSSL message digest type */
606 case CRYPTO_DIGEST_MD5:
609 case CRYPTO_DIGEST_SHA1:
613 case CRYPTO_DIGEST_SHA256:
616 case CRYPTO_DIGEST_SHA512:
621 Jmsg1(jcr, M_ERROR, 0, _("Unsupported digest type: %d\n"), type);
625 /* Initialize the backing OpenSSL context */
626 if (EVP_DigestInit_ex(&digest->ctx, md, NULL) == 0) {
633 /* This should not happen, but never say never ... */
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 openssl_post_errors(digest->jcr, M_ERROR, _("OpenSSL digest update failed"));
655 * Finalize the data in digest, storing the result in dest and the result size
656 * in length. The result size can be determined with crypto_digest_size().
658 * Returns: true on success
661 bool crypto_digest_finalize(DIGEST *digest, uint8_t *dest, uint32_t *length)
663 if (!EVP_DigestFinal(&digest->ctx, dest, (unsigned int *)length)) {
664 openssl_post_errors(digest->jcr, M_ERROR, _("OpenSSL digest finalize failed"));
672 * Free memory associated with a digest object.
674 void crypto_digest_free(DIGEST *digest)
676 EVP_MD_CTX_cleanup(&digest->ctx);
681 * Create a new message signature context.
682 * Returns: A pointer to a SIGNATURE object on success.
685 SIGNATURE *crypto_sign_new(JCR *jcr)
689 sig = (SIGNATURE *)malloc(sizeof(SIGNATURE));
694 sig->sigData = SignatureData_new();
698 /* Allocation failed in OpenSSL */
703 /* Set the ASN.1 structure version number */
704 ASN1_INTEGER_set(sig->sigData->version, BACULA_ASN1_VERSION);
710 * For a given public key, find the associated SignatureInfo record
711 * and create a digest context for signature validation
712 * Returns: CRYPTO_ERROR_NONE on success, with the newly allocated DIGEST in digest.
713 * A crypto_error_t value on failure.
715 crypto_error_t crypto_sign_get_digest(SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST **digest)
717 STACK_OF(SignerInfo) *signers;
721 signers = sig->sigData->signerInfo;
723 for (i = 0; i < sk_SignerInfo_num(signers); i++) {
724 si = sk_SignerInfo_value(signers, i);
725 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, si->subjectKeyIdentifier) == 0) {
726 /* Get the digest algorithm and allocate a digest context */
727 switch (OBJ_obj2nid(si->digestAlgorithm)) {
729 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_MD5);
732 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA1);
736 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA256);
739 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA512);
744 return CRYPTO_ERROR_INVALID_DIGEST;
747 /* Shouldn't happen */
748 if (*digest == NULL) {
749 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest_new failed"));
750 return CRYPTO_ERROR_INVALID_DIGEST;
752 return CRYPTO_ERROR_NONE;
755 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL sign get digest failed"));
760 return CRYPTO_ERROR_NOSIGNER;
764 * For a given signature, public key, and digest, verify the SIGNATURE.
765 * Returns: CRYPTO_ERROR_NONE on success.
766 * A crypto_error_t value on failure.
768 crypto_error_t crypto_sign_verify(SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST *digest)
770 STACK_OF(SignerInfo) *signers;
774 #if (OPENSSL_VERSION_NUMBER >= 0x0090800FL)
775 const unsigned char *sigData;
777 unsigned char *sigData;
780 signers = sig->sigData->signerInfo;
782 /* Find the signer */
783 for (i = 0; i < sk_SignerInfo_num(signers); i++) {
784 si = sk_SignerInfo_value(signers, i);
785 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, si->subjectKeyIdentifier) == 0) {
786 /* Extract the signature data */
787 sigLen = M_ASN1_STRING_length(si->signature);
788 sigData = M_ASN1_STRING_data(si->signature);
790 ok = EVP_VerifyFinal(&digest->ctx, sigData, sigLen, keypair->pubkey);
792 return CRYPTO_ERROR_NONE;
793 } else if (ok == 0) {
794 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest Verify final failed"));
795 return CRYPTO_ERROR_BAD_SIGNATURE;
797 /* Shouldn't happen */
798 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest Verify final failed"));
799 return CRYPTO_ERROR_INTERNAL;
803 Jmsg(sig->jcr, M_ERROR, 0, _("No signers found for crypto verify.\n"));
804 /* Signer wasn't found. */
805 return CRYPTO_ERROR_NOSIGNER;
811 * Returns: true on success
814 int crypto_sign_add_signer(SIGNATURE *sig, DIGEST *digest, X509_KEYPAIR *keypair)
816 SignerInfo *si = NULL;
817 unsigned char *buf = NULL;
820 si = SignerInfo_new();
823 /* Allocation failed in OpenSSL */
827 /* Set the ASN.1 structure version number */
828 ASN1_INTEGER_set(si->version, BACULA_ASN1_VERSION);
830 /* Set the digest algorithm identifier */
831 switch (digest->type) {
832 case CRYPTO_DIGEST_MD5:
833 si->digestAlgorithm = OBJ_nid2obj(NID_md5);
835 case CRYPTO_DIGEST_SHA1:
836 si->digestAlgorithm = OBJ_nid2obj(NID_sha1);
839 case CRYPTO_DIGEST_SHA256:
840 si->digestAlgorithm = OBJ_nid2obj(NID_sha256);
842 case CRYPTO_DIGEST_SHA512:
843 si->digestAlgorithm = OBJ_nid2obj(NID_sha512);
847 /* This should never happen */
851 /* Drop the string allocated by OpenSSL, and add our subjectKeyIdentifier */
852 M_ASN1_OCTET_STRING_free(si->subjectKeyIdentifier);
853 si->subjectKeyIdentifier = M_ASN1_OCTET_STRING_dup(keypair->keyid);
855 /* Set our signature algorithm. We currently require RSA */
856 assert(EVP_PKEY_type(keypair->pubkey->type) == EVP_PKEY_RSA);
857 /* This is slightly evil. Reach into the MD structure and grab the key type */
858 si->signatureAlgorithm = OBJ_nid2obj(digest->ctx.digest->pkey_type);
860 /* Finalize/Sign our Digest */
861 len = EVP_PKEY_size(keypair->privkey);
862 buf = (unsigned char *) malloc(len);
863 if (!EVP_SignFinal(&digest->ctx, buf, &len, keypair->privkey)) {
864 openssl_post_errors(M_ERROR, _("Signature creation failed"));
868 /* Add the signature to the SignerInfo structure */
869 if (!M_ASN1_OCTET_STRING_set(si->signature, buf, len)) {
870 /* Allocation failed in OpenSSL */
874 /* No longer needed */
877 /* Push the new SignerInfo structure onto the stack */
878 sk_SignerInfo_push(sig->sigData->signerInfo, si);
894 * Encodes the SignatureData structure. The length argument is used to specify the
895 * size of dest. A length of 0 will cause no data to be written to dest, and the
896 * required length to be written to length. The caller can then allocate sufficient
897 * space for the output.
899 * Returns: true on success, stores the encoded data in dest, and the size in length.
902 int crypto_sign_encode(SIGNATURE *sig, uint8_t *dest, uint32_t *length)
905 *length = i2d_SignatureData(sig->sigData, NULL);
909 *length = i2d_SignatureData(sig->sigData, (unsigned char **)&dest);
914 * Decodes the SignatureData structure. The length argument is used to specify the
917 * Returns: SIGNATURE instance on success.
922 SIGNATURE *crypto_sign_decode(const uint8_t *sigData, uint32_t length)
925 #if (OPENSSL_VERSION_NUMBER >= 0x0090800FL)
926 const unsigned char *p = (const unsigned char *) sigData;
928 unsigned char *p = (unsigned char *)sigData;
931 sig = (SIGNATURE *)malloc(sizeof(SIGNATURE));
936 /* d2i_SignatureData modifies the supplied pointer */
937 sig->sigData = d2i_SignatureData(NULL, &p, length);
940 /* Allocation / Decoding failed in OpenSSL */
941 openssl_post_errors(M_ERROR, _("Signature decoding failed"));
950 * Free memory associated with a signature object.
952 void crypto_sign_free(SIGNATURE *sig)
954 SignatureData_free(sig->sigData);
959 * Create a new encryption session.
960 * Returns: A pointer to a CRYPTO_SESSION object on success.
963 CRYPTO_SESSION *crypto_session_new (crypto_cipher_t cipher, alist *pubkeys)
966 X509_KEYPAIR *keypair;
967 const EVP_CIPHER *ec;
971 /* Allocate our session description structures */
972 cs = (CRYPTO_SESSION *) malloc(sizeof(CRYPTO_SESSION));
977 /* Initialize required fields */
978 cs->session_key = NULL;
980 /* Allocate a CryptoData structure */
981 cs->cryptoData = CryptoData_new();
983 if (!cs->cryptoData) {
984 /* Allocation failed in OpenSSL */
989 /* Set the ASN.1 structure version number */
990 ASN1_INTEGER_set(cs->cryptoData->version, BACULA_ASN1_VERSION);
993 * Acquire a cipher instance and set the ASN.1 cipher NID
996 case CRYPTO_CIPHER_AES_128_CBC:
997 /* AES 128 bit CBC */
998 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_aes_128_cbc);
999 ec = EVP_aes_128_cbc();
1001 case CRYPTO_CIPHER_AES_192_CBC:
1002 /* AES 192 bit CBC */
1003 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_aes_192_cbc);
1004 ec = EVP_aes_192_cbc();
1006 case CRYPTO_CIPHER_AES_256_CBC:
1007 /* AES 256 bit CBC */
1008 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_aes_256_cbc);
1009 ec = EVP_aes_256_cbc();
1011 case CRYPTO_CIPHER_BLOWFISH_CBC:
1013 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_bf_cbc);
1017 Emsg0(M_ERROR, 0, _("Unsupported cipher type specified\n"));
1018 crypto_session_free(cs);
1022 /* Generate a symmetric session key */
1023 cs->session_key_len = EVP_CIPHER_key_length(ec);
1024 cs->session_key = (unsigned char *) malloc(cs->session_key_len);
1025 if (RAND_bytes(cs->session_key, cs->session_key_len) <= 0) {
1026 /* OpenSSL failure */
1027 crypto_session_free(cs);
1031 /* Generate an IV if possible */
1032 if ((iv_len = EVP_CIPHER_iv_length(ec))) {
1033 iv = (unsigned char *) malloc(iv_len);
1035 /* Malloc failure */
1036 crypto_session_free(cs);
1040 /* Generate random IV */
1041 if (RAND_bytes(iv, iv_len) <= 0) {
1042 /* OpenSSL failure */
1043 crypto_session_free(cs);
1048 /* Store it in our ASN.1 structure */
1049 if (!M_ASN1_OCTET_STRING_set(cs->cryptoData->iv, iv, iv_len)) {
1050 /* Allocation failed in OpenSSL */
1051 crypto_session_free(cs);
1059 * Create RecipientInfo structures for supplied
1062 foreach_alist(keypair, pubkeys) {
1064 unsigned char *ekey;
1067 ri = RecipientInfo_new();
1069 /* Allocation failed in OpenSSL */
1070 crypto_session_free(cs);
1074 /* Set the ASN.1 structure version number */
1075 ASN1_INTEGER_set(ri->version, BACULA_ASN1_VERSION);
1077 /* Drop the string allocated by OpenSSL, and add our subjectKeyIdentifier */
1078 M_ASN1_OCTET_STRING_free(ri->subjectKeyIdentifier);
1079 ri->subjectKeyIdentifier = M_ASN1_OCTET_STRING_dup(keypair->keyid);
1081 /* Set our key encryption algorithm. We currently require RSA */
1082 assert(keypair->pubkey && EVP_PKEY_type(keypair->pubkey->type) == EVP_PKEY_RSA);
1083 ri->keyEncryptionAlgorithm = OBJ_nid2obj(NID_rsaEncryption);
1085 /* Encrypt the session key */
1086 ekey = (unsigned char *) malloc(EVP_PKEY_size(keypair->pubkey));
1088 RecipientInfo_free(ri);
1089 crypto_session_free(cs);
1093 if ((ekey_len = EVP_PKEY_encrypt(ekey, cs->session_key, cs->session_key_len, keypair->pubkey)) <= 0) {
1094 /* OpenSSL failure */
1095 RecipientInfo_free(ri);
1096 crypto_session_free(cs);
1101 /* Store it in our ASN.1 structure */
1102 if (!M_ASN1_OCTET_STRING_set(ri->encryptedKey, ekey, ekey_len)) {
1103 /* Allocation failed in OpenSSL */
1104 RecipientInfo_free(ri);
1105 crypto_session_free(cs);
1110 /* Free the encrypted key buffer */
1113 /* Push the new RecipientInfo structure onto the stack */
1114 sk_RecipientInfo_push(cs->cryptoData->recipientInfo, ri);
1121 * Encodes the CryptoData structure. The length argument is used to specify the
1122 * size of dest. A length of 0 will cause no data to be written to dest, and the
1123 * required length to be written to length. The caller can then allocate sufficient
1124 * space for the output.
1126 * Returns: true on success, stores the encoded data in dest, and the size in length.
1129 bool crypto_session_encode(CRYPTO_SESSION *cs, uint8_t *dest, uint32_t *length)
1132 *length = i2d_CryptoData(cs->cryptoData, NULL);
1136 *length = i2d_CryptoData(cs->cryptoData, &dest);
1141 * Decodes the CryptoData structure. The length argument is
1142 * used to specify the size of data.
1144 * Returns: CRYPTO_SESSION instance on success.
1146 * Returns: CRYPTO_ERROR_NONE and a pointer to a newly allocated CRYPTO_SESSION structure in *session on success.
1147 * A crypto_error_t value on failure.
1149 crypto_error_t crypto_session_decode(const uint8_t *data, uint32_t length, alist *keypairs, CRYPTO_SESSION **session)
1152 X509_KEYPAIR *keypair;
1153 STACK_OF(RecipientInfo) *recipients;
1154 crypto_error_t retval = CRYPTO_ERROR_NONE;
1155 #if (OPENSSL_VERSION_NUMBER >= 0x0090800FL)
1156 const unsigned char *p = (const unsigned char *)data;
1158 unsigned char *p = (unsigned char *)data;
1161 /* bacula-fd.conf doesn't contains any key */
1163 return CRYPTO_ERROR_NORECIPIENT;
1166 cs = (CRYPTO_SESSION *) malloc(sizeof(CRYPTO_SESSION));
1168 return CRYPTO_ERROR_INTERNAL;
1171 /* Initialize required fields */
1172 cs->session_key = NULL;
1174 /* d2i_CryptoData modifies the supplied pointer */
1175 cs->cryptoData = d2i_CryptoData(NULL, &p, length);
1177 if (!cs->cryptoData) {
1178 /* Allocation / Decoding failed in OpenSSL */
1179 openssl_post_errors(M_ERROR, _("CryptoData decoding failed"));
1180 retval = CRYPTO_ERROR_INTERNAL;
1184 recipients = cs->cryptoData->recipientInfo;
1187 * Find a matching RecipientInfo structure for a supplied
1190 foreach_alist(keypair, keypairs) {
1194 /* Private key available? */
1195 if (keypair->privkey == NULL) {
1199 for (i = 0; i < sk_RecipientInfo_num(recipients); i++) {
1200 ri = sk_RecipientInfo_value(recipients, i);
1202 /* Match against the subjectKeyIdentifier */
1203 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, ri->subjectKeyIdentifier) == 0) {
1204 /* Match found, extract symmetric encryption session data */
1206 /* RSA is required. */
1207 assert(EVP_PKEY_type(keypair->privkey->type) == EVP_PKEY_RSA);
1209 /* If we recieve a RecipientInfo structure that does not use
1210 * RSA, return an error */
1211 if (OBJ_obj2nid(ri->keyEncryptionAlgorithm) != NID_rsaEncryption) {
1212 retval = CRYPTO_ERROR_INVALID_CRYPTO;
1216 /* Decrypt the session key */
1217 /* Allocate sufficient space for the largest possible decrypted data */
1218 cs->session_key = (unsigned char *) malloc(EVP_PKEY_size(keypair->privkey));
1219 cs->session_key_len = EVP_PKEY_decrypt(cs->session_key, M_ASN1_STRING_data(ri->encryptedKey),
1220 M_ASN1_STRING_length(ri->encryptedKey), keypair->privkey);
1222 if (cs->session_key_len <= 0) {
1223 openssl_post_errors(M_ERROR, _("Failure decrypting the session key"));
1224 retval = CRYPTO_ERROR_DECRYPTION;
1228 /* Session key successfully extracted, return the CRYPTO_SESSION structure */
1230 return CRYPTO_ERROR_NONE;
1235 /* No matching recipient found */
1236 return CRYPTO_ERROR_NORECIPIENT;
1239 crypto_session_free(cs);
1244 * Free memory associated with a crypto session object.
1246 void crypto_session_free (CRYPTO_SESSION *cs)
1248 if (cs->cryptoData) {
1249 CryptoData_free(cs->cryptoData);
1251 if (cs->session_key){
1252 free(cs->session_key);
1258 * Create a new crypto cipher context with the specified session object
1259 * Returns: A pointer to a CIPHER_CONTEXT object on success. The cipher block size is returned in blocksize.
1262 CIPHER_CONTEXT *crypto_cipher_new(CRYPTO_SESSION *cs, bool encrypt, uint32_t *blocksize)
1264 CIPHER_CONTEXT *cipher_ctx;
1265 const EVP_CIPHER *ec;
1267 cipher_ctx = (CIPHER_CONTEXT *) malloc(sizeof(CIPHER_CONTEXT));
1273 * Acquire a cipher instance for the given ASN.1 cipher NID
1275 if ((ec = EVP_get_cipherbyobj(cs->cryptoData->contentEncryptionAlgorithm)) == NULL) {
1276 Emsg1(M_ERROR, 0, _("Unsupported contentEncryptionAlgorithm: %d\n"), OBJ_obj2nid(cs->cryptoData->contentEncryptionAlgorithm));
1281 /* Initialize the OpenSSL cipher context */
1282 EVP_CIPHER_CTX_init(&cipher_ctx->ctx);
1284 /* Initialize for encryption */
1285 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, ec, NULL, NULL, NULL, 1)) {
1286 openssl_post_errors(M_ERROR, _("OpenSSL cipher context initialization failed"));
1290 /* Initialize for decryption */
1291 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, ec, NULL, NULL, NULL, 0)) {
1292 openssl_post_errors(M_ERROR, _("OpenSSL cipher context initialization failed"));
1297 /* Set the key size */
1298 if (!EVP_CIPHER_CTX_set_key_length(&cipher_ctx->ctx, cs->session_key_len)) {
1299 openssl_post_errors(M_ERROR, _("Encryption session provided an invalid symmetric key"));
1303 /* Validate the IV length */
1304 if (EVP_CIPHER_iv_length(ec) != M_ASN1_STRING_length(cs->cryptoData->iv)) {
1305 openssl_post_errors(M_ERROR, _("Encryption session provided an invalid IV"));
1309 /* Add the key and IV to the cipher context */
1310 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, NULL, NULL, cs->session_key, M_ASN1_STRING_data(cs->cryptoData->iv), -1)) {
1311 openssl_post_errors(M_ERROR, _("OpenSSL cipher context key/IV initialization failed"));
1315 *blocksize = EVP_CIPHER_CTX_block_size(&cipher_ctx->ctx);
1319 crypto_cipher_free(cipher_ctx);
1325 * Encrypt/Decrypt length bytes of data using the provided cipher context
1326 * Returns: true on success, number of bytes output in written
1329 bool crypto_cipher_update(CIPHER_CONTEXT *cipher_ctx, const uint8_t *data, uint32_t length, const uint8_t *dest, uint32_t *written)
1331 if (!EVP_CipherUpdate(&cipher_ctx->ctx, (unsigned char *)dest, (int *)written, (const unsigned char *)data, length)) {
1332 /* This really shouldn't fail */
1340 * Finalize the cipher context, writing any remaining data and necessary padding
1341 * to dest, and the size in written.
1342 * The result size will either be one block of data or zero.
1344 * Returns: true on success
1347 bool crypto_cipher_finalize (CIPHER_CONTEXT *cipher_ctx, uint8_t *dest, uint32_t *written)
1349 if (!EVP_CipherFinal_ex(&cipher_ctx->ctx, (unsigned char *)dest, (int *) written)) {
1350 /* This really shouldn't fail */
1359 * Free memory associated with a cipher context.
1361 void crypto_cipher_free (CIPHER_CONTEXT *cipher_ctx)
1363 EVP_CIPHER_CTX_cleanup(&cipher_ctx->ctx);
1369 * Perform global initialization of OpenSSL
1370 * This function is not thread safe.
1371 * Returns: 0 on success
1374 int init_crypto (void)
1378 if ((stat = openssl_init_threads()) != 0) {
1379 Emsg1(M_ABORT, 0, _("Unable to init OpenSSL threading: ERR=%s\n"), strerror(stat));
1382 /* Load libssl and libcrypto human-readable error strings */
1383 SSL_load_error_strings();
1385 /* Initialize OpenSSL SSL library */
1388 /* Register OpenSSL ciphers and digests */
1389 OpenSSL_add_all_algorithms();
1391 if (!openssl_seed_prng()) {
1392 Emsg0(M_ERROR_TERM, 0, _("Failed to seed OpenSSL PRNG\n"));
1395 crypto_initialized = true;
1401 * Perform global cleanup of OpenSSL
1402 * All cryptographic operations must be completed before calling this function.
1403 * This function is not thread safe.
1404 * Returns: 0 on success
1407 int cleanup_crypto (void)
1410 * Ensure that we've actually been initialized; Doing this here decreases the
1411 * complexity of client's termination/cleanup code.
1413 if (!crypto_initialized) {
1417 if (!openssl_save_prng()) {
1418 Emsg0(M_ERROR, 0, _("Failed to save OpenSSL PRNG\n"));
1421 openssl_cleanup_threads();
1423 /* Free libssl and libcrypto error strings */
1426 /* Free all ciphers and digests */
1429 /* Free memory used by PRNG */
1432 crypto_initialized = false;
1438 #else /* HAVE_OPENSSL */
1439 # error No encryption library available
1440 #endif /* HAVE_OPENSSL */
1442 #else /* HAVE_CRYPTO */
1445 * Cryptography Support Disabled
1448 /* Message Digest Structure */
1450 crypto_digest_t type;
1457 /* Dummy Signature Structure */
1461 DIGEST *crypto_digest_new(JCR *jcr, crypto_digest_t type)
1465 digest = (DIGEST *)malloc(sizeof(DIGEST));
1466 digest->type = type;
1470 case CRYPTO_DIGEST_MD5:
1471 MD5Init(&digest->md5);
1473 case CRYPTO_DIGEST_SHA1:
1474 SHA1Init(&digest->sha1);
1477 Jmsg1(jcr, M_ERROR, 0, _("Unsupported digest type=%d specified\n"), type);
1485 bool crypto_digest_update(DIGEST *digest, const uint8_t *data, uint32_t length)
1487 switch (digest->type) {
1488 case CRYPTO_DIGEST_MD5:
1489 /* Doesn't return anything ... */
1490 MD5Update(&digest->md5, (unsigned char *) data, length);
1492 case CRYPTO_DIGEST_SHA1:
1494 if ((ret = SHA1Update(&digest->sha1, (const u_int8_t *) data, length)) == shaSuccess) {
1497 Emsg1(M_ERROR, 0, _("SHA1Update() returned an error: %d\n"), ret);
1506 bool crypto_digest_finalize(DIGEST *digest, uint8_t *dest, uint32_t *length)
1508 switch (digest->type) {
1509 case CRYPTO_DIGEST_MD5:
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_MD5_SIZE);
1513 *length = CRYPTO_DIGEST_MD5_SIZE;
1514 /* Doesn't return anything ... */
1515 MD5Final((unsigned char *)dest, &digest->md5);
1517 case CRYPTO_DIGEST_SHA1:
1518 /* Guard against programmer error by either the API client or
1519 * an out-of-sync CRYPTO_DIGEST_MAX_SIZE */
1520 assert(*length >= CRYPTO_DIGEST_SHA1_SIZE);
1521 *length = CRYPTO_DIGEST_SHA1_SIZE;
1522 if (SHA1Final(&digest->sha1, (u_int8_t *) dest) == shaSuccess) {
1535 void crypto_digest_free(DIGEST *digest)
1540 /* Dummy routines */
1541 int init_crypto (void) { return 0; }
1542 int cleanup_crypto (void) { return 0; }
1544 SIGNATURE *crypto_sign_new(JCR *jcr) { return NULL; }
1546 crypto_error_t crypto_sign_get_digest (SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST **digest) { return CRYPTO_ERROR_INTERNAL; }
1547 crypto_error_t crypto_sign_verify (SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST *digest) { return CRYPTO_ERROR_INTERNAL; }
1549 int crypto_sign_add_signer (SIGNATURE *sig, DIGEST *digest, X509_KEYPAIR *keypair) { return false; }
1550 int crypto_sign_encode (SIGNATURE *sig, uint8_t *dest, uint32_t *length) { return false; }
1552 SIGNATURE *crypto_sign_decode (const uint8_t *sigData, uint32_t length) { return NULL; }
1553 void crypto_sign_free (SIGNATURE *sig) { }
1556 X509_KEYPAIR *crypto_keypair_new(void) { return NULL; }
1557 X509_KEYPAIR *crypto_keypair_dup (X509_KEYPAIR *keypair) { return NULL; }
1558 int crypto_keypair_load_cert (X509_KEYPAIR *keypair, const char *file) { return false; }
1559 bool crypto_keypair_has_key (const char *file) { return false; }
1560 int crypto_keypair_load_key (X509_KEYPAIR *keypair, const char *file, CRYPTO_PEM_PASSWD_CB *pem_callback, const void *pem_userdata) { return false; }
1561 void crypto_keypair_free (X509_KEYPAIR *keypair) { }
1563 CRYPTO_SESSION *crypto_session_new (crypto_cipher_t cipher, alist *pubkeys) { return NULL; }
1564 void crypto_session_free (CRYPTO_SESSION *cs) { }
1565 bool crypto_session_encode (CRYPTO_SESSION *cs, uint8_t *dest, uint32_t *length) { return false; }
1566 crypto_error_t crypto_session_decode(const uint8_t *data, uint32_t length, alist *keypairs, CRYPTO_SESSION **session) { return CRYPTO_ERROR_INTERNAL; }
1568 CIPHER_CONTEXT *crypto_cipher_new (CRYPTO_SESSION *cs, bool encrypt, uint32_t *blocksize) { return NULL; }
1569 bool crypto_cipher_update (CIPHER_CONTEXT *cipher_ctx, const uint8_t *data, uint32_t length, const uint8_t *dest, uint32_t *written) { return false; }
1570 bool crypto_cipher_finalize (CIPHER_CONTEXT *cipher_ctx, uint8_t *dest, uint32_t *written) { return false; }
1571 void crypto_cipher_free (CIPHER_CONTEXT *cipher_ctx) { }
1573 #endif /* HAVE_CRYPTO */
1578 * Default PEM encryption passphrase callback.
1579 * Returns an empty password.
1581 int crypto_default_pem_callback(char *buf, int size, const void *userdata)
1583 bstrncpy(buf, "", size);
1584 return (strlen(buf));
1588 * Returns the ASCII name of the digest type.
1589 * Returns: ASCII name of digest type.
1591 const char *crypto_digest_name (DIGEST *digest) {
1592 switch (digest->type) {
1593 case CRYPTO_DIGEST_MD5:
1595 case CRYPTO_DIGEST_SHA1:
1597 case CRYPTO_DIGEST_SHA256:
1599 case CRYPTO_DIGEST_SHA512:
1601 case CRYPTO_DIGEST_NONE:
1604 return "Invalid Digest Type";
1610 * Given a stream type, returns the associated
1611 * crypto_digest_t value.
1613 crypto_digest_t crypto_digest_stream_type (int stream) {
1615 case STREAM_MD5_DIGEST:
1616 return CRYPTO_DIGEST_MD5;
1617 case STREAM_SHA1_DIGEST:
1618 return CRYPTO_DIGEST_SHA1;
1619 case STREAM_SHA256_DIGEST:
1620 return CRYPTO_DIGEST_SHA256;
1621 case STREAM_SHA512_DIGEST:
1622 return CRYPTO_DIGEST_SHA512;
1624 return CRYPTO_DIGEST_NONE;
1629 * * Given a crypto_error_t value, return the associated
1632 const char *crypto_strerror(crypto_error_t error) {
1634 case CRYPTO_ERROR_NONE:
1636 case CRYPTO_ERROR_NOSIGNER:
1637 return "Signer not found";
1638 case CRYPTO_ERROR_NORECIPIENT:
1639 return "Recipient not found";
1640 case CRYPTO_ERROR_INVALID_DIGEST:
1641 return "Unsupported digest algorithm";
1642 case CRYPTO_ERROR_INVALID_CRYPTO:
1643 return "Unsupported encryption algorithm";
1644 case CRYPTO_ERROR_BAD_SIGNATURE:
1645 return "Signature is invalid";
1646 case CRYPTO_ERROR_DECRYPTION:
1647 return "Decryption error";
1648 case CRYPTO_ERROR_INTERNAL:
1649 /* This shouldn't happen */
1650 return "Internal error";
1652 return "Unknown error";