2 Bacula(R) - The Network Backup Solution
4 Copyright (C) 2000-2016 Kern Sibbald
6 The original author of Bacula is Kern Sibbald, with contributions
7 from many others, a complete list can be found in the file AUTHORS.
9 You may use this file and others of this release according to the
10 license defined in the LICENSE file, which includes the Affero General
11 Public License, v3.0 ("AGPLv3") and some additional permissions and
12 terms pursuant to its AGPLv3 Section 7.
14 This notice must be preserved when any source code is
15 conveyed and/or propagated.
17 Bacula(R) is a registered trademark of Kern Sibbald.
20 * crypto.c Encryption support functions
22 * Author: Landon Fuller <landonf@opendarwin.org>
24 * This file was contributed to the Bacula project by Landon Fuller.
26 * Landon Fuller has been granted a perpetual, worldwide, non-exclusive,
27 * no-charge, royalty-free, irrevocable copyright license to reproduce,
28 * prepare derivative works of, publicly display, publicly perform,
29 * sublicense, and distribute the original work contributed by Landon Fuller
30 * to the Bacula project in source or object form.
32 * If you wish to license these contributions under an alternate open source
33 * license please contact Landon Fuller <landonf@opendarwin.org>.
42 * For OpenSSL version 1.x, EVP_PKEY_encrypt no longer
43 * exists. It was not an official API.
46 #define EVP_PKEY_encrypt EVP_PKEY_encrypt_old
47 #define EVP_PKEY_decrypt EVP_PKEY_decrypt_old
54 * Prefix: iso.org.dod.internet.private.enterprise.threerings.external.bacula (1.3.6.1.4.1.22054.500.2)
55 * Organization: Bacula Project
56 * Contact Name: Kern Sibbald
57 * Contact E-mail: kern@sibbald.com
59 * Top Level Allocations - 500.2
60 * 1 - Published Allocations
61 * 1.1 - Bacula Encryption
63 * Bacula Encryption - 500.2.1.1
66 * 2 - ASN.1 Object Identifiers
72 * BaculaCrypto { iso(1) identified-organization(3) usdod(6)
73 * internet(1) private(4) enterprises(1) three-rings(22054)
74 * external(500) bacula(2) published(1) bacula-encryption(1)
75 * asn1-modules(1) bacula-crypto(1) }
77 * DEFINITIONS AUTOMATIC TAGS ::=
80 * SignatureData ::= SEQUENCE {
81 * version Version DEFAULT v0,
82 * signerInfo SignerInfo }
84 * CryptoData ::= SEQUENCE {
85 * version Version DEFAULT v0,
86 * contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier,
87 * iv InitializationVector,
88 * recipientInfo RecipientInfo
91 * SignerInfo ::= SET OF SignerInfo
92 * RecipientInfo ::= SET OF RecipientInfo
94 * Version ::= INTEGER { v0(0) }
96 * SignerInfo ::= SEQUENCE {
98 * subjectKeyIdentifier SubjectKeyIdentifier,
99 * digestAlgorithm DigestAlgorithmIdentifier,
100 * signatureAlgorithm SignatureAlgorithmIdentifier,
101 * signature SignatureValue }
103 * RecipientInfo ::= SEQUENCE {
105 * subjectKeyIdentifier SubjectKeyIdentifier
106 * keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier
107 * encryptedKey EncryptedKey
110 * SubjectKeyIdentifier ::= OCTET STRING
112 * DigestAlgorithmIdentifier ::= AlgorithmIdentifier
114 * SignatureAlgorithmIdentifier ::= AlgorithmIdentifier
116 * KeyEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
118 * ContentEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
120 * InitializationVector ::= OCTET STRING
122 * SignatureValue ::= OCTET STRING
124 * EncryptedKey ::= OCTET STRING
126 * AlgorithmIdentifier ::= OBJECT IDENTIFIER
131 #ifdef HAVE_CRYPTO /* Is encryption enabled? */
132 #ifdef HAVE_OPENSSL /* How about OpenSSL? */
134 /* ASN.1 Declarations */
135 #define BACULA_ASN1_VERSION 0
138 ASN1_INTEGER *version;
139 ASN1_OCTET_STRING *subjectKeyIdentifier;
140 ASN1_OBJECT *digestAlgorithm;
141 ASN1_OBJECT *signatureAlgorithm;
142 ASN1_OCTET_STRING *signature;
146 ASN1_INTEGER *version;
147 ASN1_OCTET_STRING *subjectKeyIdentifier;
148 ASN1_OBJECT *keyEncryptionAlgorithm;
149 ASN1_OCTET_STRING *encryptedKey;
152 ASN1_SEQUENCE(SignerInfo) = {
153 ASN1_SIMPLE(SignerInfo, version, ASN1_INTEGER),
154 ASN1_SIMPLE(SignerInfo, subjectKeyIdentifier, ASN1_OCTET_STRING),
155 ASN1_SIMPLE(SignerInfo, digestAlgorithm, ASN1_OBJECT),
156 ASN1_SIMPLE(SignerInfo, signatureAlgorithm, ASN1_OBJECT),
157 ASN1_SIMPLE(SignerInfo, signature, ASN1_OCTET_STRING)
158 } ASN1_SEQUENCE_END(SignerInfo);
160 ASN1_SEQUENCE(RecipientInfo) = {
161 ASN1_SIMPLE(RecipientInfo, version, ASN1_INTEGER),
162 ASN1_SIMPLE(RecipientInfo, subjectKeyIdentifier, ASN1_OCTET_STRING),
163 ASN1_SIMPLE(RecipientInfo, keyEncryptionAlgorithm, ASN1_OBJECT),
164 ASN1_SIMPLE(RecipientInfo, encryptedKey, ASN1_OCTET_STRING),
165 } ASN1_SEQUENCE_END(RecipientInfo);
168 ASN1_INTEGER *version;
169 STACK_OF(SignerInfo) *signerInfo;
173 ASN1_INTEGER *version;
174 ASN1_OBJECT *contentEncryptionAlgorithm;
175 ASN1_OCTET_STRING *iv;
176 STACK_OF(RecipientInfo) *recipientInfo;
179 ASN1_SEQUENCE(SignatureData) = {
180 ASN1_SIMPLE(SignatureData, version, ASN1_INTEGER),
181 ASN1_SET_OF(SignatureData, signerInfo, SignerInfo),
182 } ASN1_SEQUENCE_END(SignatureData);
184 ASN1_SEQUENCE(CryptoData) = {
185 ASN1_SIMPLE(CryptoData, version, ASN1_INTEGER),
186 ASN1_SIMPLE(CryptoData, contentEncryptionAlgorithm, ASN1_OBJECT),
187 ASN1_SIMPLE(CryptoData, iv, ASN1_OCTET_STRING),
188 ASN1_SET_OF(CryptoData, recipientInfo, RecipientInfo)
189 } ASN1_SEQUENCE_END(CryptoData);
191 IMPLEMENT_ASN1_FUNCTIONS(SignerInfo)
192 IMPLEMENT_ASN1_FUNCTIONS(RecipientInfo)
193 IMPLEMENT_ASN1_FUNCTIONS(SignatureData)
194 IMPLEMENT_ASN1_FUNCTIONS(CryptoData)
195 IMPLEMENT_STACK_OF(SignerInfo)
196 IMPLEMENT_STACK_OF(RecipientInfo)
199 * SignerInfo and RecipientInfo stack macros, generated by OpenSSL's util/mkstack.pl.
201 #define sk_SignerInfo_new(st) SKM_sk_new(SignerInfo, (st))
202 #define sk_SignerInfo_new_null() SKM_sk_new_null(SignerInfo)
203 #define sk_SignerInfo_free(st) SKM_sk_free(SignerInfo, (st))
204 #define sk_SignerInfo_num(st) SKM_sk_num(SignerInfo, (st))
205 #define sk_SignerInfo_value(st, i) SKM_sk_value(SignerInfo, (st), (i))
206 #define sk_SignerInfo_set(st, i, val) SKM_sk_set(SignerInfo, (st), (i), (val))
207 #define sk_SignerInfo_zero(st) SKM_sk_zero(SignerInfo, (st))
208 #define sk_SignerInfo_push(st, val) SKM_sk_push(SignerInfo, (st), (val))
209 #define sk_SignerInfo_unshift(st, val) SKM_sk_unshift(SignerInfo, (st), (val))
210 #define sk_SignerInfo_find(st, val) SKM_sk_find(SignerInfo, (st), (val))
211 #define sk_SignerInfo_delete(st, i) SKM_sk_delete(SignerInfo, (st), (i))
212 #define sk_SignerInfo_delete_ptr(st, ptr) SKM_sk_delete_ptr(SignerInfo, (st), (ptr))
213 #define sk_SignerInfo_insert(st, val, i) SKM_sk_insert(SignerInfo, (st), (val), (i))
214 #define sk_SignerInfo_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(SignerInfo, (st), (cmp))
215 #define sk_SignerInfo_dup(st) SKM_sk_dup(SignerInfo, st)
216 #define sk_SignerInfo_pop_free(st, free_func) SKM_sk_pop_free(SignerInfo, (st), (free_func))
217 #define sk_SignerInfo_shift(st) SKM_sk_shift(SignerInfo, (st))
218 #define sk_SignerInfo_pop(st) SKM_sk_pop(SignerInfo, (st))
219 #define sk_SignerInfo_sort(st) SKM_sk_sort(SignerInfo, (st))
220 #define sk_SignerInfo_is_sorted(st) SKM_sk_is_sorted(SignerInfo, (st))
222 #define d2i_ASN1_SET_OF_SignerInfo(st, pp, length, d2i_func, free_func, ex_tag, ex_class) \
223 SKM_ASN1_SET_OF_d2i(SignerInfo, (st), (pp), (length), (d2i_func), (free_func), (ex_tag), (ex_class))
224 #define i2d_ASN1_SET_OF_SignerInfo(st, pp, i2d_func, ex_tag, ex_class, is_set) \
225 SKM_ASN1_SET_OF_i2d(SignerInfo, (st), (pp), (i2d_func), (ex_tag), (ex_class), (is_set))
226 #define ASN1_seq_pack_SignerInfo(st, i2d_func, buf, len) \
227 SKM_ASN1_seq_pack(SignerInfo, (st), (i2d_func), (buf), (len))
228 #define ASN1_seq_unpack_SignerInfo(buf, len, d2i_func, free_func) \
229 SKM_ASN1_seq_unpack(SignerInfo, (buf), (len), (d2i_func), (free_func))
231 #define sk_RecipientInfo_new(st) SKM_sk_new(RecipientInfo, (st))
232 #define sk_RecipientInfo_new_null() SKM_sk_new_null(RecipientInfo)
233 #define sk_RecipientInfo_free(st) SKM_sk_free(RecipientInfo, (st))
234 #define sk_RecipientInfo_num(st) SKM_sk_num(RecipientInfo, (st))
235 #define sk_RecipientInfo_value(st, i) SKM_sk_value(RecipientInfo, (st), (i))
236 #define sk_RecipientInfo_set(st, i, val) SKM_sk_set(RecipientInfo, (st), (i), (val))
237 #define sk_RecipientInfo_zero(st) SKM_sk_zero(RecipientInfo, (st))
238 #define sk_RecipientInfo_push(st, val) SKM_sk_push(RecipientInfo, (st), (val))
239 #define sk_RecipientInfo_unshift(st, val) SKM_sk_unshift(RecipientInfo, (st), (val))
240 #define sk_RecipientInfo_find(st, val) SKM_sk_find(RecipientInfo, (st), (val))
241 #define sk_RecipientInfo_delete(st, i) SKM_sk_delete(RecipientInfo, (st), (i))
242 #define sk_RecipientInfo_delete_ptr(st, ptr) SKM_sk_delete_ptr(RecipientInfo, (st), (ptr))
243 #define sk_RecipientInfo_insert(st, val, i) SKM_sk_insert(RecipientInfo, (st), (val), (i))
244 #define sk_RecipientInfo_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(RecipientInfo, (st), (cmp))
245 #define sk_RecipientInfo_dup(st) SKM_sk_dup(RecipientInfo, st)
246 #define sk_RecipientInfo_pop_free(st, free_func) SKM_sk_pop_free(RecipientInfo, (st), (free_func))
247 #define sk_RecipientInfo_shift(st) SKM_sk_shift(RecipientInfo, (st))
248 #define sk_RecipientInfo_pop(st) SKM_sk_pop(RecipientInfo, (st))
249 #define sk_RecipientInfo_sort(st) SKM_sk_sort(RecipientInfo, (st))
250 #define sk_RecipientInfo_is_sorted(st) SKM_sk_is_sorted(RecipientInfo, (st))
252 #define d2i_ASN1_SET_OF_RecipientInfo(st, pp, length, d2i_func, free_func, ex_tag, ex_class) \
253 SKM_ASN1_SET_OF_d2i(RecipientInfo, (st), (pp), (length), (d2i_func), (free_func), (ex_tag), (ex_class))
254 #define i2d_ASN1_SET_OF_RecipientInfo(st, pp, i2d_func, ex_tag, ex_class, is_set) \
255 SKM_ASN1_SET_OF_i2d(RecipientInfo, (st), (pp), (i2d_func), (ex_tag), (ex_class), (is_set))
256 #define ASN1_seq_pack_RecipientInfo(st, i2d_func, buf, len) \
257 SKM_ASN1_seq_pack(RecipientInfo, (st), (i2d_func), (buf), (len))
258 #define ASN1_seq_unpack_RecipientInfo(buf, len, d2i_func, free_func) \
259 SKM_ASN1_seq_unpack(RecipientInfo, (buf), (len), (d2i_func), (free_func))
260 /* End of util/mkstack.pl block */
262 /* X509 Public/Private Key Pair Structure */
263 struct X509_Keypair {
264 ASN1_OCTET_STRING *keyid;
269 /* Message Digest Structure */
271 crypto_digest_t type;
276 /* Message Signature Structure */
278 SignatureData *sigData;
282 /* Encryption Session Data */
283 struct Crypto_Session {
284 CryptoData *cryptoData; /* ASN.1 Structure */
285 unsigned char *session_key; /* Private symmetric session key */
286 size_t session_key_len; /* Symmetric session key length */
289 /* Symmetric Cipher Context */
290 struct Cipher_Context {
294 /* PEM Password Dispatch Context */
295 typedef struct PEM_CB_Context {
296 CRYPTO_PEM_PASSWD_CB *pem_callback;
297 const void *pem_userdata;
301 * Extract subjectKeyIdentifier from x509 certificate.
302 * Returns: On success, an ASN1_OCTET_STRING that must be freed via M_ASN1_OCTET_STRING_free().
305 static ASN1_OCTET_STRING *openssl_cert_keyid(X509 *cert) {
307 const X509V3_EXT_METHOD *method;
308 ASN1_OCTET_STRING *keyid;
310 const unsigned char *ext_value_data;
312 /* Find the index to the subjectKeyIdentifier extension */
313 i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
319 /* Grab the extension */
320 ext = X509_get_ext(cert, i);
322 /* Get x509 extension method structure */
323 if (!(method = X509V3_EXT_get(ext))) {
327 ext_value_data = ext->value->data;
332 /* Decode ASN1 item in data */
333 keyid = (ASN1_OCTET_STRING *) ASN1_item_d2i(NULL, &ext_value_data, ext->value->length,
334 ASN1_ITEM_ptr(method->it));
338 /* Decode ASN1 item in data */
339 keyid = (ASN1_OCTET_STRING *) method->d2i(NULL, &ext_value_data, ext->value->length);
346 * Create a new keypair object.
347 * Returns: A pointer to a X509 KEYPAIR object on success.
350 X509_KEYPAIR *crypto_keypair_new(void)
352 X509_KEYPAIR *keypair;
354 /* Allocate our keypair structure */
355 keypair = (X509_KEYPAIR *)malloc(sizeof(X509_KEYPAIR));
357 /* Initialize our keypair structure */
358 keypair->keyid = NULL;
359 keypair->pubkey = NULL;
360 keypair->privkey = NULL;
366 * Create a copy of a keypair object. The underlying
367 * EVP objects are not duplicated, as no EVP_PKEY_dup()
368 * API is available. Instead, the reference count is
371 X509_KEYPAIR *crypto_keypair_dup(X509_KEYPAIR *keypair)
373 X509_KEYPAIR *newpair;
375 newpair = crypto_keypair_new();
378 /* Allocation failed */
382 /* Increment the public key ref count */
383 if (keypair->pubkey) {
384 CRYPTO_add(&(keypair->pubkey->references), 1, CRYPTO_LOCK_EVP_PKEY);
385 newpair->pubkey = keypair->pubkey;
388 /* Increment the private key ref count */
389 if (keypair->privkey) {
390 CRYPTO_add(&(keypair->privkey->references), 1, CRYPTO_LOCK_EVP_PKEY);
391 newpair->privkey = keypair->privkey;
394 /* Duplicate the keyid */
395 if (keypair->keyid) {
396 newpair->keyid = M_ASN1_OCTET_STRING_dup(keypair->keyid);
397 if (!newpair->keyid) {
398 /* Allocation failed */
399 crypto_keypair_free(newpair);
409 * Load a public key from a PEM-encoded x509 certificate.
410 * Returns: true on success
413 int crypto_keypair_load_cert(X509_KEYPAIR *keypair, const char *file)
419 if (!(bio = BIO_new_file(file, "r"))) {
420 openssl_post_errors(M_ERROR, _("Unable to open certificate file"));
424 cert = PEM_read_bio_X509(bio, NULL, NULL, NULL);
427 openssl_post_errors(M_ERROR, _("Unable to read certificate from file"));
431 /* Extract the public key */
432 if (!(keypair->pubkey = X509_get_pubkey(cert))) {
433 openssl_post_errors(M_ERROR, _("Unable to extract public key from certificate"));
437 /* Extract the subjectKeyIdentifier extension field */
438 if ((keypair->keyid = openssl_cert_keyid(cert)) == NULL) {
439 Jmsg0(NULL, M_ERROR, 0,
440 _("Provided certificate does not include the required subjectKeyIdentifier extension."));
444 /* Validate the public key type (only RSA is supported) */
445 if (EVP_PKEY_type(keypair->pubkey->type) != EVP_PKEY_RSA) {
446 Jmsg1(NULL, M_ERROR, 0,
447 _("Unsupported key type provided: %d\n"), EVP_PKEY_type(keypair->pubkey->type));
456 if (keypair->pubkey) {
457 EVP_PKEY_free(keypair->pubkey);
462 /* Dispatch user PEM encryption callbacks */
463 static int crypto_pem_callback_dispatch (char *buf, int size, int rwflag, void *userdata)
465 PEM_CB_CONTEXT *ctx = (PEM_CB_CONTEXT *) userdata;
466 return (ctx->pem_callback(buf, size, ctx->pem_userdata));
470 * Check a PEM-encoded file
471 * for the existence of a private key.
472 * Returns: true if a private key is found
475 bool crypto_keypair_has_key(const char *file) {
479 unsigned char *data = NULL;
483 if (!(bio = BIO_new_file(file, "r"))) {
484 openssl_post_errors(M_ERROR, _("Unable to open private key file"));
488 while (PEM_read_bio(bio, &name, &header, &data, &len)) {
489 /* We don't care what the data is, just that it's there */
490 OPENSSL_free(header);
494 * PEM Header Found, check for a private key
495 * Due to OpenSSL limitations, we must specifically
496 * list supported PEM private key encodings.
498 if (strcmp(name, PEM_STRING_RSA) == 0
499 || strcmp(name, PEM_STRING_DSA) == 0
500 || strcmp(name, PEM_STRING_PKCS8) == 0
501 || strcmp(name, PEM_STRING_PKCS8INF) == 0) {
513 /* Post PEM-decoding error messages, if any */
514 openssl_post_errors(M_ERROR, _("Unable to read private key from file"));
519 * Load a PEM-encoded private key.
520 * Returns: true on success
523 int crypto_keypair_load_key(X509_KEYPAIR *keypair, const char *file,
524 CRYPTO_PEM_PASSWD_CB *pem_callback,
525 const void *pem_userdata)
531 if (!(bio = BIO_new_file(file, "r"))) {
532 openssl_post_errors(M_ERROR, _("Unable to open private key file"));
536 /* Set up PEM encryption callback */
538 ctx.pem_callback = pem_callback;
539 ctx.pem_userdata = pem_userdata;
541 ctx.pem_callback = crypto_default_pem_callback;
542 ctx.pem_userdata = NULL;
545 keypair->privkey = PEM_read_bio_PrivateKey(bio, NULL, crypto_pem_callback_dispatch, &ctx);
547 if (!keypair->privkey) {
548 openssl_post_errors(M_ERROR, _("Unable to read private key from file"));
556 * Free memory associated with a keypair object.
558 void crypto_keypair_free(X509_KEYPAIR *keypair)
560 if (keypair->pubkey) {
561 EVP_PKEY_free(keypair->pubkey);
563 if (keypair->privkey) {
564 EVP_PKEY_free(keypair->privkey);
566 if (keypair->keyid) {
567 M_ASN1_OCTET_STRING_free(keypair->keyid);
573 * Create a new message digest context of the specified type
574 * Returns: A pointer to a DIGEST object on success.
577 DIGEST *crypto_digest_new(JCR *jcr, crypto_digest_t type)
580 const EVP_MD *md = NULL; /* Quell invalid uninitialized warnings */
582 digest = (DIGEST *)malloc(sizeof(DIGEST));
585 Dmsg1(150, "crypto_digest_new jcr=%p\n", jcr);
587 /* Initialize the OpenSSL message digest context */
588 EVP_MD_CTX_init(&digest->ctx);
590 /* Determine the correct OpenSSL message digest type */
592 case CRYPTO_DIGEST_MD5:
595 case CRYPTO_DIGEST_SHA1:
599 case CRYPTO_DIGEST_SHA256:
602 case CRYPTO_DIGEST_SHA512:
607 Jmsg1(jcr, M_ERROR, 0, _("Unsupported digest type: %d\n"), type);
611 /* Initialize the backing OpenSSL context */
612 if (EVP_DigestInit_ex(&digest->ctx, md, NULL) == 0) {
619 /* This should not happen, but never say never ... */
620 Dmsg0(150, "Digest init failed.\n");
621 openssl_post_errors(jcr, M_ERROR, _("OpenSSL digest initialization failed"));
622 crypto_digest_free(digest);
627 * Hash length bytes of data into the provided digest context.
628 * Returns: true on success
631 bool crypto_digest_update(DIGEST *digest, const uint8_t *data, uint32_t length)
633 if (EVP_DigestUpdate(&digest->ctx, data, length) == 0) {
634 Dmsg0(150, "digest update failed\n");
635 openssl_post_errors(digest->jcr, M_ERROR, _("OpenSSL digest update failed"));
643 * Finalize the data in digest, storing the result in dest and the result size
644 * in length. The result size can be determined with crypto_digest_size().
646 * Returns: true on success
649 bool crypto_digest_finalize(DIGEST *digest, uint8_t *dest, uint32_t *length)
651 if (!EVP_DigestFinal(&digest->ctx, dest, (unsigned int *)length)) {
652 Dmsg0(150, "digest finalize failed\n");
653 openssl_post_errors(digest->jcr, M_ERROR, _("OpenSSL digest finalize failed"));
661 * Free memory associated with a digest object.
663 void crypto_digest_free(DIGEST *digest)
665 EVP_MD_CTX_cleanup(&digest->ctx);
670 * Create a new message signature context.
671 * Returns: A pointer to a SIGNATURE object on success.
674 SIGNATURE *crypto_sign_new(JCR *jcr)
678 sig = (SIGNATURE *)malloc(sizeof(SIGNATURE));
683 sig->sigData = SignatureData_new();
685 Dmsg1(150, "crypto_sign_new jcr=%p\n", jcr);
688 /* Allocation failed in OpenSSL */
693 /* Set the ASN.1 structure version number */
694 ASN1_INTEGER_set(sig->sigData->version, BACULA_ASN1_VERSION);
700 * For a given public key, find the associated SignatureInfo record
701 * and create a digest context for signature validation
703 * Returns: CRYPTO_ERROR_NONE on success, with the newly allocated DIGEST in digest.
704 * A crypto_error_t value on failure.
706 crypto_error_t crypto_sign_get_digest(SIGNATURE *sig, X509_KEYPAIR *keypair,
707 crypto_digest_t &type, DIGEST **digest)
709 STACK_OF(SignerInfo) *signers;
713 signers = sig->sigData->signerInfo;
715 for (i = 0; i < sk_SignerInfo_num(signers); i++) {
716 si = sk_SignerInfo_value(signers, i);
717 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, si->subjectKeyIdentifier) == 0) {
718 /* Get the digest algorithm and allocate a digest context */
719 Dmsg1(150, "crypto_sign_get_digest jcr=%p\n", sig->jcr);
720 switch (OBJ_obj2nid(si->digestAlgorithm)) {
722 Dmsg0(100, "sign digest algorithm is MD5\n");
723 type = CRYPTO_DIGEST_MD5;
724 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_MD5);
727 Dmsg0(100, "sign digest algorithm is SHA1\n");
728 type = CRYPTO_DIGEST_SHA1;
729 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA1);
733 Dmsg0(100, "sign digest algorithm is SHA256\n");
734 type = CRYPTO_DIGEST_SHA256;
735 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA256);
738 Dmsg0(100, "sign digest algorithm is SHA512\n");
739 type = CRYPTO_DIGEST_SHA512;
740 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA512);
744 type = CRYPTO_DIGEST_NONE;
746 return CRYPTO_ERROR_INVALID_DIGEST;
749 /* Shouldn't happen */
750 if (*digest == NULL) {
751 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest_new failed"));
752 return CRYPTO_ERROR_INVALID_DIGEST;
754 return CRYPTO_ERROR_NONE;
757 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL sign get digest failed"));
762 return CRYPTO_ERROR_NOSIGNER;
766 * For a given signature, public key, and digest, verify the SIGNATURE.
767 * Returns: CRYPTO_ERROR_NONE on success.
768 * A crypto_error_t value on failure.
770 crypto_error_t crypto_sign_verify(SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST *digest)
772 STACK_OF(SignerInfo) *signers;
776 const unsigned char *sigData;
778 signers = sig->sigData->signerInfo;
780 /* Find the signer */
781 for (i = 0; i < sk_SignerInfo_num(signers); i++) {
782 si = sk_SignerInfo_value(signers, i);
783 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, si->subjectKeyIdentifier) == 0) {
784 /* Extract the signature data */
785 sigLen = M_ASN1_STRING_length(si->signature);
786 sigData = M_ASN1_STRING_data(si->signature);
788 ok = EVP_VerifyFinal(&digest->ctx, sigData, sigLen, keypair->pubkey);
790 return CRYPTO_ERROR_NONE;
791 } else if (ok == 0) {
792 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest Verify final failed"));
793 return CRYPTO_ERROR_BAD_SIGNATURE;
795 /* Shouldn't happen */
796 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest Verify final failed"));
797 return CRYPTO_ERROR_INTERNAL;
801 Jmsg(sig->jcr, M_ERROR, 0, _("No signers found for crypto verify.\n"));
802 /* Signer wasn't found. */
803 return CRYPTO_ERROR_NOSIGNER;
809 * Returns: true on success
812 int crypto_sign_add_signer(SIGNATURE *sig, DIGEST *digest, X509_KEYPAIR *keypair)
814 SignerInfo *si = NULL;
815 unsigned char *buf = NULL;
818 si = SignerInfo_new();
821 /* Allocation failed in OpenSSL */
825 /* Set the ASN.1 structure version number */
826 ASN1_INTEGER_set(si->version, BACULA_ASN1_VERSION);
828 /* Set the digest algorithm identifier */
829 switch (digest->type) {
830 case CRYPTO_DIGEST_MD5:
831 si->digestAlgorithm = OBJ_nid2obj(NID_md5);
833 case CRYPTO_DIGEST_SHA1:
834 si->digestAlgorithm = OBJ_nid2obj(NID_sha1);
837 case CRYPTO_DIGEST_SHA256:
838 si->digestAlgorithm = OBJ_nid2obj(NID_sha256);
840 case CRYPTO_DIGEST_SHA512:
841 si->digestAlgorithm = OBJ_nid2obj(NID_sha512);
845 /* This should never happen */
849 /* Drop the string allocated by OpenSSL, and add our subjectKeyIdentifier */
850 M_ASN1_OCTET_STRING_free(si->subjectKeyIdentifier);
851 si->subjectKeyIdentifier = M_ASN1_OCTET_STRING_dup(keypair->keyid);
853 /* Set our signature algorithm. We currently require RSA */
854 assert(EVP_PKEY_type(keypair->pubkey->type) == EVP_PKEY_RSA);
855 /* This is slightly evil. Reach into the MD structure and grab the key type */
856 si->signatureAlgorithm = OBJ_nid2obj(digest->ctx.digest->pkey_type);
858 /* Finalize/Sign our Digest */
859 len = EVP_PKEY_size(keypair->privkey);
860 buf = (unsigned char *) malloc(len);
861 if (!EVP_SignFinal(&digest->ctx, buf, &len, keypair->privkey)) {
862 openssl_post_errors(M_ERROR, _("Signature creation failed"));
866 /* Add the signature to the SignerInfo structure */
867 if (!M_ASN1_OCTET_STRING_set(si->signature, buf, len)) {
868 /* Allocation failed in OpenSSL */
872 /* No longer needed */
875 /* Push the new SignerInfo structure onto the stack */
876 sk_SignerInfo_push(sig->sigData->signerInfo, si);
892 * Encodes the SignatureData structure. The length argument is used to specify the
893 * size of dest. A length of 0 will cause no data to be written to dest, and the
894 * required length to be written to length. The caller can then allocate sufficient
895 * space for the output.
897 * Returns: true on success, stores the encoded data in dest, and the size in length.
900 int crypto_sign_encode(SIGNATURE *sig, uint8_t *dest, uint32_t *length)
903 *length = i2d_SignatureData(sig->sigData, NULL);
907 *length = i2d_SignatureData(sig->sigData, (unsigned char **)&dest);
912 * Decodes the SignatureData structure. The length argument is used to specify the
915 * Returns: SIGNATURE instance on success.
920 SIGNATURE *crypto_sign_decode(JCR *jcr, const uint8_t *sigData, uint32_t length)
923 const unsigned char *p = (const unsigned char *) sigData;
925 sig = (SIGNATURE *)malloc(sizeof(SIGNATURE));
931 /* d2i_SignatureData modifies the supplied pointer */
932 sig->sigData = d2i_SignatureData(NULL, &p, length);
935 /* Allocation / Decoding failed in OpenSSL */
936 openssl_post_errors(jcr, M_ERROR, _("Signature decoding failed"));
945 * Free memory associated with a signature object.
947 void crypto_sign_free(SIGNATURE *sig)
949 SignatureData_free(sig->sigData);
954 * Create a new encryption session.
955 * Returns: A pointer to a CRYPTO_SESSION object on success.
958 * Note! Bacula malloc() fails if out of memory.
960 CRYPTO_SESSION *crypto_session_new (crypto_cipher_t cipher, alist *pubkeys)
963 X509_KEYPAIR *keypair;
964 const EVP_CIPHER *ec;
968 /* Allocate our session description structures */
969 cs = (CRYPTO_SESSION *)malloc(sizeof(CRYPTO_SESSION));
971 /* Initialize required fields */
972 cs->session_key = NULL;
974 /* Allocate a CryptoData structure */
975 cs->cryptoData = CryptoData_new();
977 if (!cs->cryptoData) {
978 /* Allocation failed in OpenSSL */
983 /* Set the ASN.1 structure version number */
984 ASN1_INTEGER_set(cs->cryptoData->version, BACULA_ASN1_VERSION);
987 * Acquire a cipher instance and set the ASN.1 cipher NID
990 case CRYPTO_CIPHER_AES_128_CBC:
991 /* AES 128 bit CBC */
992 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_aes_128_cbc);
993 ec = EVP_aes_128_cbc();
995 #ifndef HAVE_OPENSSL_EXPORT_LIBRARY
996 case CRYPTO_CIPHER_AES_192_CBC:
997 /* AES 192 bit CBC */
998 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_aes_192_cbc);
999 ec = EVP_aes_192_cbc();
1001 case CRYPTO_CIPHER_AES_256_CBC:
1002 /* AES 256 bit CBC */
1003 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_aes_256_cbc);
1004 ec = EVP_aes_256_cbc();
1007 case CRYPTO_CIPHER_BLOWFISH_CBC:
1009 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_bf_cbc);
1013 Jmsg0(NULL, M_ERROR, 0, _("Unsupported cipher type specified\n"));
1014 crypto_session_free(cs);
1018 /* Generate a symmetric session key */
1019 cs->session_key_len = EVP_CIPHER_key_length(ec);
1020 cs->session_key = (unsigned char *) malloc(cs->session_key_len);
1021 if (RAND_bytes(cs->session_key, cs->session_key_len) <= 0) {
1022 /* OpenSSL failure */
1023 crypto_session_free(cs);
1027 /* Generate an IV if possible */
1028 if ((iv_len = EVP_CIPHER_iv_length(ec))) {
1029 iv = (unsigned char *)malloc(iv_len);
1031 /* Generate random IV */
1032 if (RAND_bytes(iv, iv_len) <= 0) {
1033 /* OpenSSL failure */
1034 crypto_session_free(cs);
1039 /* Store it in our ASN.1 structure */
1040 if (!M_ASN1_OCTET_STRING_set(cs->cryptoData->iv, iv, iv_len)) {
1041 /* Allocation failed in OpenSSL */
1042 crypto_session_free(cs);
1050 * Create RecipientInfo structures for supplied
1053 foreach_alist(keypair, pubkeys) {
1055 unsigned char *ekey;
1058 ri = RecipientInfo_new();
1060 /* Allocation failed in OpenSSL */
1061 crypto_session_free(cs);
1065 /* Set the ASN.1 structure version number */
1066 ASN1_INTEGER_set(ri->version, BACULA_ASN1_VERSION);
1068 /* Drop the string allocated by OpenSSL, and add our subjectKeyIdentifier */
1069 M_ASN1_OCTET_STRING_free(ri->subjectKeyIdentifier);
1070 ri->subjectKeyIdentifier = M_ASN1_OCTET_STRING_dup(keypair->keyid);
1072 /* Set our key encryption algorithm. We currently require RSA */
1073 assert(keypair->pubkey && EVP_PKEY_type(keypair->pubkey->type) == EVP_PKEY_RSA);
1074 ri->keyEncryptionAlgorithm = OBJ_nid2obj(NID_rsaEncryption);
1076 /* Encrypt the session key */
1077 ekey = (unsigned char *)malloc(EVP_PKEY_size(keypair->pubkey));
1079 if ((ekey_len = EVP_PKEY_encrypt(ekey, cs->session_key, cs->session_key_len, keypair->pubkey)) <= 0) {
1080 /* OpenSSL failure */
1081 RecipientInfo_free(ri);
1082 crypto_session_free(cs);
1087 /* Store it in our ASN.1 structure */
1088 if (!M_ASN1_OCTET_STRING_set(ri->encryptedKey, ekey, ekey_len)) {
1089 /* Allocation failed in OpenSSL */
1090 RecipientInfo_free(ri);
1091 crypto_session_free(cs);
1096 /* Free the encrypted key buffer */
1099 /* Push the new RecipientInfo structure onto the stack */
1100 sk_RecipientInfo_push(cs->cryptoData->recipientInfo, ri);
1107 * Encodes the CryptoData structure. The length argument is used to specify the
1108 * size of dest. A length of 0 will cause no data to be written to dest, and the
1109 * required length to be written to length. The caller can then allocate sufficient
1110 * space for the output.
1112 * Returns: true on success, stores the encoded data in dest, and the size in length.
1115 bool crypto_session_encode(CRYPTO_SESSION *cs, uint8_t *dest, uint32_t *length)
1118 *length = i2d_CryptoData(cs->cryptoData, NULL);
1122 *length = i2d_CryptoData(cs->cryptoData, &dest);
1127 * Decodes the CryptoData structure. The length argument is
1128 * used to specify the size of data.
1130 * Returns: CRYPTO_SESSION instance on success.
1132 * Returns: CRYPTO_ERROR_NONE and a pointer to a newly allocated CRYPTO_SESSION structure in *session on success.
1133 * A crypto_error_t value on failure.
1135 crypto_error_t crypto_session_decode(const uint8_t *data, uint32_t length, alist *keypairs, CRYPTO_SESSION **session)
1138 X509_KEYPAIR *keypair;
1139 STACK_OF(RecipientInfo) *recipients;
1140 crypto_error_t retval = CRYPTO_ERROR_NONE;
1141 const unsigned char *p = (const unsigned char *)data;
1143 /* bacula-fd.conf doesn't contains any key */
1145 return CRYPTO_ERROR_NORECIPIENT;
1148 cs = (CRYPTO_SESSION *)malloc(sizeof(CRYPTO_SESSION));
1150 /* Initialize required fields */
1151 cs->session_key = NULL;
1153 /* d2i_CryptoData modifies the supplied pointer */
1154 cs->cryptoData = d2i_CryptoData(NULL, &p, length);
1156 if (!cs->cryptoData) {
1157 /* Allocation / Decoding failed in OpenSSL */
1158 openssl_post_errors(M_ERROR, _("CryptoData decoding failed"));
1159 retval = CRYPTO_ERROR_INTERNAL;
1163 recipients = cs->cryptoData->recipientInfo;
1166 * Find a matching RecipientInfo structure for a supplied
1169 foreach_alist(keypair, keypairs) {
1173 /* Private key available? */
1174 if (keypair->privkey == NULL) {
1178 for (i = 0; i < sk_RecipientInfo_num(recipients); i++) {
1179 ri = sk_RecipientInfo_value(recipients, i);
1181 /* Match against the subjectKeyIdentifier */
1182 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, ri->subjectKeyIdentifier) == 0) {
1183 /* Match found, extract symmetric encryption session data */
1185 /* RSA is required. */
1186 assert(EVP_PKEY_type(keypair->privkey->type) == EVP_PKEY_RSA);
1188 /* If we recieve a RecipientInfo structure that does not use
1189 * RSA, return an error */
1190 if (OBJ_obj2nid(ri->keyEncryptionAlgorithm) != NID_rsaEncryption) {
1191 retval = CRYPTO_ERROR_INVALID_CRYPTO;
1195 /* Decrypt the session key */
1196 /* Allocate sufficient space for the largest possible decrypted data */
1197 cs->session_key = (unsigned char *)malloc(EVP_PKEY_size(keypair->privkey));
1198 cs->session_key_len = EVP_PKEY_decrypt(cs->session_key, M_ASN1_STRING_data(ri->encryptedKey),
1199 M_ASN1_STRING_length(ri->encryptedKey), keypair->privkey);
1201 if (cs->session_key_len <= 0) {
1202 openssl_post_errors(M_ERROR, _("Failure decrypting the session key"));
1203 retval = CRYPTO_ERROR_DECRYPTION;
1207 /* Session key successfully extracted, return the CRYPTO_SESSION structure */
1209 return CRYPTO_ERROR_NONE;
1214 /* No matching recipient found */
1215 return CRYPTO_ERROR_NORECIPIENT;
1218 crypto_session_free(cs);
1223 * Free memory associated with a crypto session object.
1225 void crypto_session_free(CRYPTO_SESSION *cs)
1227 if (cs->cryptoData) {
1228 CryptoData_free(cs->cryptoData);
1230 if (cs->session_key){
1231 free(cs->session_key);
1237 * Create a new crypto cipher context with the specified session object
1238 * Returns: A pointer to a CIPHER_CONTEXT object on success. The cipher block size is returned in blocksize.
1241 CIPHER_CONTEXT *crypto_cipher_new(CRYPTO_SESSION *cs, bool encrypt, uint32_t *blocksize)
1243 CIPHER_CONTEXT *cipher_ctx;
1244 const EVP_CIPHER *ec;
1246 cipher_ctx = (CIPHER_CONTEXT *)malloc(sizeof(CIPHER_CONTEXT));
1249 * Acquire a cipher instance for the given ASN.1 cipher NID
1251 if ((ec = EVP_get_cipherbyobj(cs->cryptoData->contentEncryptionAlgorithm)) == NULL) {
1252 Jmsg1(NULL, M_ERROR, 0,
1253 _("Unsupported contentEncryptionAlgorithm: %d\n"), OBJ_obj2nid(cs->cryptoData->contentEncryptionAlgorithm));
1258 /* Initialize the OpenSSL cipher context */
1259 EVP_CIPHER_CTX_init(&cipher_ctx->ctx);
1261 /* Initialize for encryption */
1262 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, ec, NULL, NULL, NULL, 1)) {
1263 openssl_post_errors(M_ERROR, _("OpenSSL cipher context initialization failed"));
1267 /* Initialize for decryption */
1268 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, ec, NULL, NULL, NULL, 0)) {
1269 openssl_post_errors(M_ERROR, _("OpenSSL cipher context initialization failed"));
1274 /* Set the key size */
1275 if (!EVP_CIPHER_CTX_set_key_length(&cipher_ctx->ctx, cs->session_key_len)) {
1276 openssl_post_errors(M_ERROR, _("Encryption session provided an invalid symmetric key"));
1280 /* Validate the IV length */
1281 if (EVP_CIPHER_iv_length(ec) != M_ASN1_STRING_length(cs->cryptoData->iv)) {
1282 openssl_post_errors(M_ERROR, _("Encryption session provided an invalid IV"));
1286 /* Add the key and IV to the cipher context */
1287 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, NULL, NULL, cs->session_key, M_ASN1_STRING_data(cs->cryptoData->iv), -1)) {
1288 openssl_post_errors(M_ERROR, _("OpenSSL cipher context key/IV initialization failed"));
1292 *blocksize = EVP_CIPHER_CTX_block_size(&cipher_ctx->ctx);
1296 crypto_cipher_free(cipher_ctx);
1302 * Encrypt/Decrypt length bytes of data using the provided cipher context
1303 * Returns: true on success, number of bytes output in written
1306 bool crypto_cipher_update(CIPHER_CONTEXT *cipher_ctx, const uint8_t *data, uint32_t length, const uint8_t *dest, uint32_t *written)
1308 if (!EVP_CipherUpdate(&cipher_ctx->ctx, (unsigned char *)dest, (int *)written, (const unsigned char *)data, length)) {
1309 /* This really shouldn't fail */
1317 * Finalize the cipher context, writing any remaining data and necessary padding
1318 * to dest, and the size in written.
1319 * The result size will either be one block of data or zero.
1321 * Returns: true on success
1324 bool crypto_cipher_finalize (CIPHER_CONTEXT *cipher_ctx, uint8_t *dest, uint32_t *written)
1326 if (!EVP_CipherFinal_ex(&cipher_ctx->ctx, (unsigned char *)dest, (int *) written)) {
1327 /* This really shouldn't fail */
1336 * Free memory associated with a cipher context.
1338 void crypto_cipher_free (CIPHER_CONTEXT *cipher_ctx)
1340 EVP_CIPHER_CTX_cleanup(&cipher_ctx->ctx);
1346 #else /* HAVE_OPENSSL */
1347 # error No encryption library available
1348 #endif /* HAVE_OPENSSL */
1350 #else /* HAVE_CRYPTO */
1353 * Cryptography Support Disabled
1356 /* Message Digest Structure */
1358 crypto_digest_t type;
1366 /* Dummy Signature Structure */
1371 DIGEST *crypto_digest_new(JCR *jcr, crypto_digest_t type)
1375 digest = (DIGEST *)malloc(sizeof(DIGEST));
1376 digest->type = type;
1380 case CRYPTO_DIGEST_MD5:
1381 MD5Init(&digest->md5);
1383 case CRYPTO_DIGEST_SHA1:
1384 SHA1Init(&digest->sha1);
1387 Jmsg1(jcr, M_ERROR, 0, _("Unsupported digest type=%d specified\n"), type);
1395 bool crypto_digest_update(DIGEST *digest, const uint8_t *data, uint32_t length)
1397 switch (digest->type) {
1398 case CRYPTO_DIGEST_MD5:
1399 /* Doesn't return anything ... */
1400 MD5Update(&digest->md5, (unsigned char *) data, length);
1402 case CRYPTO_DIGEST_SHA1:
1404 if ((ret = SHA1Update(&digest->sha1, (const u_int8_t *) data, length)) == shaSuccess) {
1407 Jmsg1(NULL, M_ERROR, 0, _("SHA1Update() returned an error: %d\n"), ret);
1416 bool crypto_digest_finalize(DIGEST *digest, uint8_t *dest, uint32_t *length)
1418 switch (digest->type) {
1419 case CRYPTO_DIGEST_MD5:
1420 /* Guard against programmer error by either the API client or
1421 * an out-of-sync CRYPTO_DIGEST_MAX_SIZE */
1422 assert(*length >= CRYPTO_DIGEST_MD5_SIZE);
1423 *length = CRYPTO_DIGEST_MD5_SIZE;
1424 /* Doesn't return anything ... */
1425 MD5Final((unsigned char *)dest, &digest->md5);
1427 case CRYPTO_DIGEST_SHA1:
1428 /* Guard against programmer error by either the API client or
1429 * an out-of-sync CRYPTO_DIGEST_MAX_SIZE */
1430 assert(*length >= CRYPTO_DIGEST_SHA1_SIZE);
1431 *length = CRYPTO_DIGEST_SHA1_SIZE;
1432 if (SHA1Final(&digest->sha1, (u_int8_t *) dest) == shaSuccess) {
1445 void crypto_digest_free(DIGEST *digest)
1450 SIGNATURE *crypto_sign_new(JCR *jcr) { return NULL; }
1452 crypto_error_t crypto_sign_get_digest (SIGNATURE *sig, X509_KEYPAIR *keypair,
1453 crypto_digest_t &type, DIGEST **digest)
1454 { return CRYPTO_ERROR_INTERNAL; }
1456 crypto_error_t crypto_sign_verify (SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST *digest) { return CRYPTO_ERROR_INTERNAL; }
1458 int crypto_sign_add_signer (SIGNATURE *sig, DIGEST *digest, X509_KEYPAIR *keypair) { return false; }
1459 int crypto_sign_encode (SIGNATURE *sig, uint8_t *dest, uint32_t *length) { return false; }
1461 SIGNATURE *crypto_sign_decode (JCR *jcr, const uint8_t *sigData, uint32_t length) { return NULL; }
1462 void crypto_sign_free (SIGNATURE *sig) { }
1465 X509_KEYPAIR *crypto_keypair_new(void) { return NULL; }
1466 X509_KEYPAIR *crypto_keypair_dup (X509_KEYPAIR *keypair) { return NULL; }
1467 int crypto_keypair_load_cert (X509_KEYPAIR *keypair, const char *file) { return false; }
1468 bool crypto_keypair_has_key (const char *file) { return false; }
1469 int crypto_keypair_load_key (X509_KEYPAIR *keypair, const char *file, CRYPTO_PEM_PASSWD_CB *pem_callback, const void *pem_userdata) { return false; }
1470 void crypto_keypair_free (X509_KEYPAIR *keypair) { }
1472 CRYPTO_SESSION *crypto_session_new (crypto_cipher_t cipher, alist *pubkeys) { return NULL; }
1473 void crypto_session_free (CRYPTO_SESSION *cs) { }
1474 bool crypto_session_encode (CRYPTO_SESSION *cs, uint8_t *dest, uint32_t *length) { return false; }
1475 crypto_error_t crypto_session_decode(const uint8_t *data, uint32_t length, alist *keypairs, CRYPTO_SESSION **session) { return CRYPTO_ERROR_INTERNAL; }
1477 CIPHER_CONTEXT *crypto_cipher_new (CRYPTO_SESSION *cs, bool encrypt, uint32_t *blocksize) { return NULL; }
1478 bool crypto_cipher_update (CIPHER_CONTEXT *cipher_ctx, const uint8_t *data, uint32_t length, const uint8_t *dest, uint32_t *written) { return false; }
1479 bool crypto_cipher_finalize (CIPHER_CONTEXT *cipher_ctx, uint8_t *dest, uint32_t *written) { return false; }
1480 void crypto_cipher_free (CIPHER_CONTEXT *cipher_ctx) { }
1482 #endif /* HAVE_CRYPTO */
1487 * Default PEM encryption passphrase callback.
1488 * Returns an empty password.
1490 int crypto_default_pem_callback(char *buf, int size, const void *userdata)
1492 bstrncpy(buf, "", size);
1493 return (strlen(buf));
1497 * Returns the ASCII name of the digest type.
1498 * Returns: ASCII name of digest type.
1500 const char *crypto_digest_name(DIGEST *digest)
1502 switch (digest->type) {
1503 case CRYPTO_DIGEST_MD5:
1505 case CRYPTO_DIGEST_SHA1:
1507 case CRYPTO_DIGEST_SHA256:
1509 case CRYPTO_DIGEST_SHA512:
1511 case CRYPTO_DIGEST_NONE:
1514 return "Invalid Digest Type";
1520 * Given a stream type, returns the associated
1521 * crypto_digest_t value.
1523 crypto_digest_t crypto_digest_stream_type(int stream)
1526 case STREAM_MD5_DIGEST:
1527 return CRYPTO_DIGEST_MD5;
1528 case STREAM_SHA1_DIGEST:
1529 return CRYPTO_DIGEST_SHA1;
1530 case STREAM_SHA256_DIGEST:
1531 return CRYPTO_DIGEST_SHA256;
1532 case STREAM_SHA512_DIGEST:
1533 return CRYPTO_DIGEST_SHA512;
1535 return CRYPTO_DIGEST_NONE;
1540 * * Given a crypto_error_t value, return the associated
1543 const char *crypto_strerror(crypto_error_t error) {
1545 case CRYPTO_ERROR_NONE:
1546 return _("No error");
1547 case CRYPTO_ERROR_NOSIGNER:
1548 return _("Signer not found");
1549 case CRYPTO_ERROR_NORECIPIENT:
1550 return _("Recipient not found");
1551 case CRYPTO_ERROR_INVALID_DIGEST:
1552 return _("Unsupported digest algorithm");
1553 case CRYPTO_ERROR_INVALID_CRYPTO:
1554 return _("Unsupported encryption algorithm");
1555 case CRYPTO_ERROR_BAD_SIGNATURE:
1556 return _("Signature is invalid");
1557 case CRYPTO_ERROR_DECRYPTION:
1558 return _("Decryption error");
1559 case CRYPTO_ERROR_INTERNAL:
1560 /* This shouldn't happen */
1561 return _("Internal error");
1563 return _("Unknown error");