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 #include "openssl-compat.h"
136 /* ASN.1 Declarations */
137 #define BACULA_ASN1_VERSION 0
140 ASN1_INTEGER *version;
141 ASN1_OCTET_STRING *subjectKeyIdentifier;
142 ASN1_OBJECT *digestAlgorithm;
143 ASN1_OBJECT *signatureAlgorithm;
144 ASN1_OCTET_STRING *signature;
148 ASN1_INTEGER *version;
149 ASN1_OCTET_STRING *subjectKeyIdentifier;
150 ASN1_OBJECT *keyEncryptionAlgorithm;
151 ASN1_OCTET_STRING *encryptedKey;
154 ASN1_SEQUENCE(SignerInfo) = {
155 ASN1_SIMPLE(SignerInfo, version, ASN1_INTEGER),
156 ASN1_SIMPLE(SignerInfo, subjectKeyIdentifier, ASN1_OCTET_STRING),
157 ASN1_SIMPLE(SignerInfo, digestAlgorithm, ASN1_OBJECT),
158 ASN1_SIMPLE(SignerInfo, signatureAlgorithm, ASN1_OBJECT),
159 ASN1_SIMPLE(SignerInfo, signature, ASN1_OCTET_STRING)
160 } ASN1_SEQUENCE_END(SignerInfo);
162 ASN1_SEQUENCE(RecipientInfo) = {
163 ASN1_SIMPLE(RecipientInfo, version, ASN1_INTEGER),
164 ASN1_SIMPLE(RecipientInfo, subjectKeyIdentifier, ASN1_OCTET_STRING),
165 ASN1_SIMPLE(RecipientInfo, keyEncryptionAlgorithm, ASN1_OBJECT),
166 ASN1_SIMPLE(RecipientInfo, encryptedKey, ASN1_OCTET_STRING),
167 } ASN1_SEQUENCE_END(RecipientInfo);
170 ASN1_INTEGER *version;
171 STACK_OF(SignerInfo) *signerInfo;
175 ASN1_INTEGER *version;
176 ASN1_OBJECT *contentEncryptionAlgorithm;
177 ASN1_OCTET_STRING *iv;
178 STACK_OF(RecipientInfo) *recipientInfo;
181 ASN1_SEQUENCE(SignatureData) = {
182 ASN1_SIMPLE(SignatureData, version, ASN1_INTEGER),
183 ASN1_SET_OF(SignatureData, signerInfo, SignerInfo),
184 } ASN1_SEQUENCE_END(SignatureData);
186 ASN1_SEQUENCE(CryptoData) = {
187 ASN1_SIMPLE(CryptoData, version, ASN1_INTEGER),
188 ASN1_SIMPLE(CryptoData, contentEncryptionAlgorithm, ASN1_OBJECT),
189 ASN1_SIMPLE(CryptoData, iv, ASN1_OCTET_STRING),
190 ASN1_SET_OF(CryptoData, recipientInfo, RecipientInfo)
191 } ASN1_SEQUENCE_END(CryptoData);
193 IMPLEMENT_ASN1_FUNCTIONS(SignerInfo)
194 IMPLEMENT_ASN1_FUNCTIONS(RecipientInfo)
195 IMPLEMENT_ASN1_FUNCTIONS(SignatureData)
196 IMPLEMENT_ASN1_FUNCTIONS(CryptoData)
198 #if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
199 DEFINE_STACK_OF(SignerInfo);
200 DEFINE_STACK_OF(RecipientInfo);
203 * SignerInfo and RecipientInfo stack macros, generated by OpenSSL's util/mkstack.pl.
205 #define sk_SignerInfo_new(st) SKM_sk_new(SignerInfo, (st))
206 #define sk_SignerInfo_new_null() SKM_sk_new_null(SignerInfo)
207 #define sk_SignerInfo_free(st) SKM_sk_free(SignerInfo, (st))
208 #define sk_SignerInfo_num(st) SKM_sk_num(SignerInfo, (st))
209 #define sk_SignerInfo_value(st, i) SKM_sk_value(SignerInfo, (st), (i))
210 #define sk_SignerInfo_set(st, i, val) SKM_sk_set(SignerInfo, (st), (i), (val))
211 #define sk_SignerInfo_zero(st) SKM_sk_zero(SignerInfo, (st))
212 #define sk_SignerInfo_push(st, val) SKM_sk_push(SignerInfo, (st), (val))
213 #define sk_SignerInfo_unshift(st, val) SKM_sk_unshift(SignerInfo, (st), (val))
214 #define sk_SignerInfo_find(st, val) SKM_sk_find(SignerInfo, (st), (val))
215 #define sk_SignerInfo_delete(st, i) SKM_sk_delete(SignerInfo, (st), (i))
216 #define sk_SignerInfo_delete_ptr(st, ptr) SKM_sk_delete_ptr(SignerInfo, (st), (ptr))
217 #define sk_SignerInfo_insert(st, val, i) SKM_sk_insert(SignerInfo, (st), (val), (i))
218 #define sk_SignerInfo_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(SignerInfo, (st), (cmp))
219 #define sk_SignerInfo_dup(st) SKM_sk_dup(SignerInfo, st)
220 #define sk_SignerInfo_pop_free(st, free_func) SKM_sk_pop_free(SignerInfo, (st), (free_func))
221 #define sk_SignerInfo_shift(st) SKM_sk_shift(SignerInfo, (st))
222 #define sk_SignerInfo_pop(st) SKM_sk_pop(SignerInfo, (st))
223 #define sk_SignerInfo_sort(st) SKM_sk_sort(SignerInfo, (st))
224 #define sk_SignerInfo_is_sorted(st) SKM_sk_is_sorted(SignerInfo, (st))
226 #define d2i_ASN1_SET_OF_SignerInfo(st, pp, length, d2i_func, free_func, ex_tag, ex_class) \
227 SKM_ASN1_SET_OF_d2i(SignerInfo, (st), (pp), (length), (d2i_func), (free_func), (ex_tag), (ex_class))
228 #define i2d_ASN1_SET_OF_SignerInfo(st, pp, i2d_func, ex_tag, ex_class, is_set) \
229 SKM_ASN1_SET_OF_i2d(SignerInfo, (st), (pp), (i2d_func), (ex_tag), (ex_class), (is_set))
230 #define ASN1_seq_pack_SignerInfo(st, i2d_func, buf, len) \
231 SKM_ASN1_seq_pack(SignerInfo, (st), (i2d_func), (buf), (len))
232 #define ASN1_seq_unpack_SignerInfo(buf, len, d2i_func, free_func) \
233 SKM_ASN1_seq_unpack(SignerInfo, (buf), (len), (d2i_func), (free_func))
235 #define sk_RecipientInfo_new(st) SKM_sk_new(RecipientInfo, (st))
236 #define sk_RecipientInfo_new_null() SKM_sk_new_null(RecipientInfo)
237 #define sk_RecipientInfo_free(st) SKM_sk_free(RecipientInfo, (st))
238 #define sk_RecipientInfo_num(st) SKM_sk_num(RecipientInfo, (st))
239 #define sk_RecipientInfo_value(st, i) SKM_sk_value(RecipientInfo, (st), (i))
240 #define sk_RecipientInfo_set(st, i, val) SKM_sk_set(RecipientInfo, (st), (i), (val))
241 #define sk_RecipientInfo_zero(st) SKM_sk_zero(RecipientInfo, (st))
242 #define sk_RecipientInfo_push(st, val) SKM_sk_push(RecipientInfo, (st), (val))
243 #define sk_RecipientInfo_unshift(st, val) SKM_sk_unshift(RecipientInfo, (st), (val))
244 #define sk_RecipientInfo_find(st, val) SKM_sk_find(RecipientInfo, (st), (val))
245 #define sk_RecipientInfo_delete(st, i) SKM_sk_delete(RecipientInfo, (st), (i))
246 #define sk_RecipientInfo_delete_ptr(st, ptr) SKM_sk_delete_ptr(RecipientInfo, (st), (ptr))
247 #define sk_RecipientInfo_insert(st, val, i) SKM_sk_insert(RecipientInfo, (st), (val), (i))
248 #define sk_RecipientInfo_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(RecipientInfo, (st), (cmp))
249 #define sk_RecipientInfo_dup(st) SKM_sk_dup(RecipientInfo, st)
250 #define sk_RecipientInfo_pop_free(st, free_func) SKM_sk_pop_free(RecipientInfo, (st), (free_func))
251 #define sk_RecipientInfo_shift(st) SKM_sk_shift(RecipientInfo, (st))
252 #define sk_RecipientInfo_pop(st) SKM_sk_pop(RecipientInfo, (st))
253 #define sk_RecipientInfo_sort(st) SKM_sk_sort(RecipientInfo, (st))
254 #define sk_RecipientInfo_is_sorted(st) SKM_sk_is_sorted(RecipientInfo, (st))
256 #define d2i_ASN1_SET_OF_RecipientInfo(st, pp, length, d2i_func, free_func, ex_tag, ex_class) \
257 SKM_ASN1_SET_OF_d2i(RecipientInfo, (st), (pp), (length), (d2i_func), (free_func), (ex_tag), (ex_class))
258 #define i2d_ASN1_SET_OF_RecipientInfo(st, pp, i2d_func, ex_tag, ex_class, is_set) \
259 SKM_ASN1_SET_OF_i2d(RecipientInfo, (st), (pp), (i2d_func), (ex_tag), (ex_class), (is_set))
260 #define ASN1_seq_pack_RecipientInfo(st, i2d_func, buf, len) \
261 SKM_ASN1_seq_pack(RecipientInfo, (st), (i2d_func), (buf), (len))
262 #define ASN1_seq_unpack_RecipientInfo(buf, len, d2i_func, free_func) \
263 SKM_ASN1_seq_unpack(RecipientInfo, (buf), (len), (d2i_func), (free_func))
264 /* 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 const X509V3_EXT_METHOD *method;
313 ASN1_OCTET_STRING *keyid;
315 const unsigned char *ext_value_data;
317 /* Find the index to the subjectKeyIdentifier extension */
318 i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
324 /* Grab the extension */
325 ext = X509_get_ext(cert, i);
327 /* Get x509 extension method structure */
328 if (!(method = X509V3_EXT_get(ext))) {
332 ext_value_data = ext->value->data;
337 /* Decode ASN1 item in data */
338 keyid = (ASN1_OCTET_STRING *) ASN1_item_d2i(NULL, &ext_value_data, ext->value->length,
339 ASN1_ITEM_ptr(method->it));
343 /* Decode ASN1 item in data */
344 keyid = (ASN1_OCTET_STRING *) method->d2i(NULL, &ext_value_data, ext->value->length);
351 * Create a new keypair object.
352 * Returns: A pointer to a X509 KEYPAIR object on success.
355 X509_KEYPAIR *crypto_keypair_new(void)
357 X509_KEYPAIR *keypair;
359 /* Allocate our keypair structure */
360 keypair = (X509_KEYPAIR *)malloc(sizeof(X509_KEYPAIR));
362 /* Initialize our keypair structure */
363 keypair->keyid = NULL;
364 keypair->pubkey = NULL;
365 keypair->privkey = NULL;
371 * Create a copy of a keypair object. The underlying
372 * EVP objects are not duplicated, as no EVP_PKEY_dup()
373 * API is available. Instead, the reference count is
376 X509_KEYPAIR *crypto_keypair_dup(X509_KEYPAIR *keypair)
378 X509_KEYPAIR *newpair;
380 newpair = crypto_keypair_new();
383 /* Allocation failed */
387 /* Increment the public key ref count */
388 if (keypair->pubkey) {
389 CRYPTO_add(&(keypair->pubkey->references), 1, CRYPTO_LOCK_EVP_PKEY);
390 newpair->pubkey = keypair->pubkey;
393 /* Increment the private key ref count */
394 if (keypair->privkey) {
395 CRYPTO_add(&(keypair->privkey->references), 1, CRYPTO_LOCK_EVP_PKEY);
396 newpair->privkey = keypair->privkey;
399 /* Duplicate the keyid */
400 if (keypair->keyid) {
401 newpair->keyid = M_ASN1_OCTET_STRING_dup(keypair->keyid);
402 if (!newpair->keyid) {
403 /* Allocation failed */
404 crypto_keypair_free(newpair);
414 * Load a public key from a PEM-encoded x509 certificate.
415 * Returns: true on success
418 int crypto_keypair_load_cert(X509_KEYPAIR *keypair, const char *file)
424 if (!(bio = BIO_new_file(file, "r"))) {
425 openssl_post_errors(M_ERROR, _("Unable to open certificate file"));
429 cert = PEM_read_bio_X509(bio, NULL, NULL, NULL);
432 openssl_post_errors(M_ERROR, _("Unable to read certificate from file"));
436 /* Extract the public key */
437 if (!(keypair->pubkey = X509_get_pubkey(cert))) {
438 openssl_post_errors(M_ERROR, _("Unable to extract public key from certificate"));
442 /* Extract the subjectKeyIdentifier extension field */
443 if ((keypair->keyid = openssl_cert_keyid(cert)) == NULL) {
444 Jmsg0(NULL, M_ERROR, 0,
445 _("Provided certificate does not include the required subjectKeyIdentifier extension."));
449 /* Validate the public key type (only RSA is supported) */
450 if (EVP_PKEY_type(keypair->pubkey->type) != EVP_PKEY_RSA) {
451 Jmsg1(NULL, M_ERROR, 0,
452 _("Unsupported key type provided: %d\n"), EVP_PKEY_type(keypair->pubkey->type));
461 if (keypair->pubkey) {
462 EVP_PKEY_free(keypair->pubkey);
467 /* Dispatch user PEM encryption callbacks */
468 static int crypto_pem_callback_dispatch (char *buf, int size, int rwflag, void *userdata)
470 PEM_CB_CONTEXT *ctx = (PEM_CB_CONTEXT *) userdata;
471 return (ctx->pem_callback(buf, size, ctx->pem_userdata));
475 * Check a PEM-encoded file
476 * for the existence of a private key.
477 * Returns: true if a private key is found
480 bool crypto_keypair_has_key(const char *file) {
484 unsigned char *data = NULL;
488 if (!(bio = BIO_new_file(file, "r"))) {
489 openssl_post_errors(M_ERROR, _("Unable to open private key file"));
493 while (PEM_read_bio(bio, &name, &header, &data, &len)) {
494 /* We don't care what the data is, just that it's there */
495 OPENSSL_free(header);
499 * PEM Header Found, check for a private key
500 * Due to OpenSSL limitations, we must specifically
501 * list supported PEM private key encodings.
503 if (strcmp(name, PEM_STRING_RSA) == 0
504 || strcmp(name, PEM_STRING_DSA) == 0
505 || strcmp(name, PEM_STRING_PKCS8) == 0
506 || strcmp(name, PEM_STRING_PKCS8INF) == 0) {
518 /* Post PEM-decoding error messages, if any */
519 openssl_post_errors(M_ERROR, _("Unable to read private key from file"));
524 * Load a PEM-encoded private key.
525 * Returns: true on success
528 int crypto_keypair_load_key(X509_KEYPAIR *keypair, const char *file,
529 CRYPTO_PEM_PASSWD_CB *pem_callback,
530 const void *pem_userdata)
536 if (!(bio = BIO_new_file(file, "r"))) {
537 openssl_post_errors(M_ERROR, _("Unable to open private key file"));
541 /* Set up PEM encryption callback */
543 ctx.pem_callback = pem_callback;
544 ctx.pem_userdata = pem_userdata;
546 ctx.pem_callback = crypto_default_pem_callback;
547 ctx.pem_userdata = NULL;
550 keypair->privkey = PEM_read_bio_PrivateKey(bio, NULL, crypto_pem_callback_dispatch, &ctx);
552 if (!keypair->privkey) {
553 openssl_post_errors(M_ERROR, _("Unable to read private key from file"));
561 * Free memory associated with a keypair object.
563 void crypto_keypair_free(X509_KEYPAIR *keypair)
565 if (keypair->pubkey) {
566 EVP_PKEY_free(keypair->pubkey);
568 if (keypair->privkey) {
569 EVP_PKEY_free(keypair->privkey);
571 if (keypair->keyid) {
572 M_ASN1_OCTET_STRING_free(keypair->keyid);
578 * Create a new message digest context of the specified type
579 * Returns: A pointer to a DIGEST object on success.
582 DIGEST *crypto_digest_new(JCR *jcr, crypto_digest_t type)
585 const EVP_MD *md = NULL; /* Quell invalid uninitialized warnings */
587 digest = (DIGEST *)malloc(sizeof(DIGEST));
590 Dmsg1(150, "crypto_digest_new jcr=%p\n", jcr);
592 /* Initialize the OpenSSL message digest context */
593 EVP_MD_CTX_init(&digest->ctx);
595 /* Determine the correct OpenSSL message digest type */
597 case CRYPTO_DIGEST_MD5:
600 case CRYPTO_DIGEST_SHA1:
604 case CRYPTO_DIGEST_SHA256:
607 case CRYPTO_DIGEST_SHA512:
612 Jmsg1(jcr, M_ERROR, 0, _("Unsupported digest type: %d\n"), type);
616 /* Initialize the backing OpenSSL context */
617 if (EVP_DigestInit_ex(&digest->ctx, md, NULL) == 0) {
624 /* This should not happen, but never say never ... */
625 Dmsg0(150, "Digest init failed.\n");
626 openssl_post_errors(jcr, M_ERROR, _("OpenSSL digest initialization failed"));
627 crypto_digest_free(digest);
632 * Hash length bytes of data into the provided digest context.
633 * Returns: true on success
636 bool crypto_digest_update(DIGEST *digest, const uint8_t *data, uint32_t length)
638 if (EVP_DigestUpdate(&digest->ctx, data, length) == 0) {
639 Dmsg0(150, "digest update failed\n");
640 openssl_post_errors(digest->jcr, M_ERROR, _("OpenSSL digest update failed"));
648 * Finalize the data in digest, storing the result in dest and the result size
649 * in length. The result size can be determined with crypto_digest_size().
651 * Returns: true on success
654 bool crypto_digest_finalize(DIGEST *digest, uint8_t *dest, uint32_t *length)
656 if (!EVP_DigestFinal(&digest->ctx, dest, (unsigned int *)length)) {
657 Dmsg0(150, "digest finalize failed\n");
658 openssl_post_errors(digest->jcr, M_ERROR, _("OpenSSL digest finalize failed"));
666 * Free memory associated with a digest object.
668 void crypto_digest_free(DIGEST *digest)
670 EVP_MD_CTX_cleanup(&digest->ctx);
675 * Create a new message signature context.
676 * Returns: A pointer to a SIGNATURE object on success.
679 SIGNATURE *crypto_sign_new(JCR *jcr)
683 sig = (SIGNATURE *)malloc(sizeof(SIGNATURE));
688 sig->sigData = SignatureData_new();
690 Dmsg1(150, "crypto_sign_new jcr=%p\n", jcr);
693 /* Allocation failed in OpenSSL */
698 /* Set the ASN.1 structure version number */
699 ASN1_INTEGER_set(sig->sigData->version, BACULA_ASN1_VERSION);
705 * For a given public key, find the associated SignatureInfo record
706 * and create a digest context for signature validation
708 * Returns: CRYPTO_ERROR_NONE on success, with the newly allocated DIGEST in digest.
709 * A crypto_error_t value on failure.
711 crypto_error_t crypto_sign_get_digest(SIGNATURE *sig, X509_KEYPAIR *keypair,
712 crypto_digest_t &type, DIGEST **digest)
714 STACK_OF(SignerInfo) *signers;
718 signers = sig->sigData->signerInfo;
720 for (i = 0; i < sk_SignerInfo_num(signers); i++) {
721 si = sk_SignerInfo_value(signers, i);
722 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, si->subjectKeyIdentifier) == 0) {
723 /* Get the digest algorithm and allocate a digest context */
724 Dmsg1(150, "crypto_sign_get_digest jcr=%p\n", sig->jcr);
725 switch (OBJ_obj2nid(si->digestAlgorithm)) {
727 Dmsg0(100, "sign digest algorithm is MD5\n");
728 type = CRYPTO_DIGEST_MD5;
729 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_MD5);
732 Dmsg0(100, "sign digest algorithm is SHA1\n");
733 type = CRYPTO_DIGEST_SHA1;
734 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA1);
738 Dmsg0(100, "sign digest algorithm is SHA256\n");
739 type = CRYPTO_DIGEST_SHA256;
740 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA256);
743 Dmsg0(100, "sign digest algorithm is SHA512\n");
744 type = CRYPTO_DIGEST_SHA512;
745 *digest = crypto_digest_new(sig->jcr, CRYPTO_DIGEST_SHA512);
749 type = CRYPTO_DIGEST_NONE;
751 return CRYPTO_ERROR_INVALID_DIGEST;
754 /* Shouldn't happen */
755 if (*digest == NULL) {
756 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest_new failed"));
757 return CRYPTO_ERROR_INVALID_DIGEST;
759 return CRYPTO_ERROR_NONE;
762 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL sign get digest failed"));
767 return CRYPTO_ERROR_NOSIGNER;
771 * For a given signature, public key, and digest, verify the SIGNATURE.
772 * Returns: CRYPTO_ERROR_NONE on success.
773 * A crypto_error_t value on failure.
775 crypto_error_t crypto_sign_verify(SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST *digest)
777 STACK_OF(SignerInfo) *signers;
781 const unsigned char *sigData;
783 signers = sig->sigData->signerInfo;
785 /* Find the signer */
786 for (i = 0; i < sk_SignerInfo_num(signers); i++) {
787 si = sk_SignerInfo_value(signers, i);
788 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, si->subjectKeyIdentifier) == 0) {
789 /* Extract the signature data */
790 sigLen = M_ASN1_STRING_length(si->signature);
791 sigData = M_ASN1_STRING_data(si->signature);
793 ok = EVP_VerifyFinal(&digest->ctx, sigData, sigLen, keypair->pubkey);
795 return CRYPTO_ERROR_NONE;
796 } else if (ok == 0) {
797 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest Verify final failed"));
798 return CRYPTO_ERROR_BAD_SIGNATURE;
800 /* Shouldn't happen */
801 openssl_post_errors(sig->jcr, M_ERROR, _("OpenSSL digest Verify final failed"));
802 return CRYPTO_ERROR_INTERNAL;
806 Jmsg(sig->jcr, M_ERROR, 0, _("No signers found for crypto verify.\n"));
807 /* Signer wasn't found. */
808 return CRYPTO_ERROR_NOSIGNER;
814 * Returns: true on success
817 int crypto_sign_add_signer(SIGNATURE *sig, DIGEST *digest, X509_KEYPAIR *keypair)
819 SignerInfo *si = NULL;
820 unsigned char *buf = NULL;
823 si = SignerInfo_new();
826 /* Allocation failed in OpenSSL */
830 /* Set the ASN.1 structure version number */
831 ASN1_INTEGER_set(si->version, BACULA_ASN1_VERSION);
833 /* Set the digest algorithm identifier */
834 switch (digest->type) {
835 case CRYPTO_DIGEST_MD5:
836 si->digestAlgorithm = OBJ_nid2obj(NID_md5);
838 case CRYPTO_DIGEST_SHA1:
839 si->digestAlgorithm = OBJ_nid2obj(NID_sha1);
842 case CRYPTO_DIGEST_SHA256:
843 si->digestAlgorithm = OBJ_nid2obj(NID_sha256);
845 case CRYPTO_DIGEST_SHA512:
846 si->digestAlgorithm = OBJ_nid2obj(NID_sha512);
850 /* This should never happen */
854 /* Drop the string allocated by OpenSSL, and add our subjectKeyIdentifier */
855 M_ASN1_OCTET_STRING_free(si->subjectKeyIdentifier);
856 si->subjectKeyIdentifier = M_ASN1_OCTET_STRING_dup(keypair->keyid);
858 /* Set our signature algorithm. We currently require RSA */
859 assert(EVP_PKEY_type(keypair->pubkey->type) == EVP_PKEY_RSA);
860 /* This is slightly evil. Reach into the MD structure and grab the key type */
861 si->signatureAlgorithm = OBJ_nid2obj(digest->ctx.digest->pkey_type);
863 /* Finalize/Sign our Digest */
864 len = EVP_PKEY_size(keypair->privkey);
865 buf = (unsigned char *) malloc(len);
866 if (!EVP_SignFinal(&digest->ctx, buf, &len, keypair->privkey)) {
867 openssl_post_errors(M_ERROR, _("Signature creation failed"));
871 /* Add the signature to the SignerInfo structure */
872 if (!M_ASN1_OCTET_STRING_set(si->signature, buf, len)) {
873 /* Allocation failed in OpenSSL */
877 /* No longer needed */
880 /* Push the new SignerInfo structure onto the stack */
881 sk_SignerInfo_push(sig->sigData->signerInfo, si);
897 * Encodes the SignatureData structure. The length argument is used to specify the
898 * size of dest. A length of 0 will cause no data to be written to dest, and the
899 * required length to be written to length. The caller can then allocate sufficient
900 * space for the output.
902 * Returns: true on success, stores the encoded data in dest, and the size in length.
905 int crypto_sign_encode(SIGNATURE *sig, uint8_t *dest, uint32_t *length)
908 *length = i2d_SignatureData(sig->sigData, NULL);
912 *length = i2d_SignatureData(sig->sigData, (unsigned char **)&dest);
917 * Decodes the SignatureData structure. The length argument is used to specify the
920 * Returns: SIGNATURE instance on success.
925 SIGNATURE *crypto_sign_decode(JCR *jcr, const uint8_t *sigData, uint32_t length)
928 const unsigned char *p = (const unsigned char *) sigData;
930 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(jcr, 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 * Note! Bacula malloc() fails if out of memory.
965 CRYPTO_SESSION *crypto_session_new (crypto_cipher_t cipher, alist *pubkeys)
968 X509_KEYPAIR *keypair;
969 const EVP_CIPHER *ec;
973 /* Allocate our session description structures */
974 cs = (CRYPTO_SESSION *)malloc(sizeof(CRYPTO_SESSION));
976 /* Initialize required fields */
977 cs->session_key = NULL;
979 /* Allocate a CryptoData structure */
980 cs->cryptoData = CryptoData_new();
982 if (!cs->cryptoData) {
983 /* Allocation failed in OpenSSL */
988 /* Set the ASN.1 structure version number */
989 ASN1_INTEGER_set(cs->cryptoData->version, BACULA_ASN1_VERSION);
992 * Acquire a cipher instance and set the ASN.1 cipher NID
995 case CRYPTO_CIPHER_AES_128_CBC:
996 /* AES 128 bit CBC */
997 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_aes_128_cbc);
998 ec = EVP_aes_128_cbc();
1000 #ifndef HAVE_OPENSSL_EXPORT_LIBRARY
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();
1012 case CRYPTO_CIPHER_BLOWFISH_CBC:
1014 cs->cryptoData->contentEncryptionAlgorithm = OBJ_nid2obj(NID_bf_cbc);
1018 Jmsg0(NULL, M_ERROR, 0, _("Unsupported cipher type specified\n"));
1019 crypto_session_free(cs);
1023 /* Generate a symmetric session key */
1024 cs->session_key_len = EVP_CIPHER_key_length(ec);
1025 cs->session_key = (unsigned char *) malloc(cs->session_key_len);
1026 if (RAND_bytes(cs->session_key, cs->session_key_len) <= 0) {
1027 /* OpenSSL failure */
1028 crypto_session_free(cs);
1032 /* Generate an IV if possible */
1033 if ((iv_len = EVP_CIPHER_iv_length(ec))) {
1034 iv = (unsigned char *)malloc(iv_len);
1036 /* Generate random IV */
1037 if (RAND_bytes(iv, iv_len) <= 0) {
1038 /* OpenSSL failure */
1039 crypto_session_free(cs);
1044 /* Store it in our ASN.1 structure */
1045 if (!M_ASN1_OCTET_STRING_set(cs->cryptoData->iv, iv, iv_len)) {
1046 /* Allocation failed in OpenSSL */
1047 crypto_session_free(cs);
1055 * Create RecipientInfo structures for supplied
1058 foreach_alist(keypair, pubkeys) {
1060 unsigned char *ekey;
1063 ri = RecipientInfo_new();
1065 /* Allocation failed in OpenSSL */
1066 crypto_session_free(cs);
1070 /* Set the ASN.1 structure version number */
1071 ASN1_INTEGER_set(ri->version, BACULA_ASN1_VERSION);
1073 /* Drop the string allocated by OpenSSL, and add our subjectKeyIdentifier */
1074 M_ASN1_OCTET_STRING_free(ri->subjectKeyIdentifier);
1075 ri->subjectKeyIdentifier = M_ASN1_OCTET_STRING_dup(keypair->keyid);
1077 /* Set our key encryption algorithm. We currently require RSA */
1078 assert(keypair->pubkey && EVP_PKEY_type(keypair->pubkey->type) == EVP_PKEY_RSA);
1079 ri->keyEncryptionAlgorithm = OBJ_nid2obj(NID_rsaEncryption);
1081 /* Encrypt the session key */
1082 ekey = (unsigned char *)malloc(EVP_PKEY_size(keypair->pubkey));
1084 if ((ekey_len = EVP_PKEY_encrypt(ekey, cs->session_key, cs->session_key_len, keypair->pubkey)) <= 0) {
1085 /* OpenSSL failure */
1086 RecipientInfo_free(ri);
1087 crypto_session_free(cs);
1092 /* Store it in our ASN.1 structure */
1093 if (!M_ASN1_OCTET_STRING_set(ri->encryptedKey, ekey, ekey_len)) {
1094 /* Allocation failed in OpenSSL */
1095 RecipientInfo_free(ri);
1096 crypto_session_free(cs);
1101 /* Free the encrypted key buffer */
1104 /* Push the new RecipientInfo structure onto the stack */
1105 sk_RecipientInfo_push(cs->cryptoData->recipientInfo, ri);
1112 * Encodes the CryptoData structure. The length argument is used to specify the
1113 * size of dest. A length of 0 will cause no data to be written to dest, and the
1114 * required length to be written to length. The caller can then allocate sufficient
1115 * space for the output.
1117 * Returns: true on success, stores the encoded data in dest, and the size in length.
1120 bool crypto_session_encode(CRYPTO_SESSION *cs, uint8_t *dest, uint32_t *length)
1123 *length = i2d_CryptoData(cs->cryptoData, NULL);
1127 *length = i2d_CryptoData(cs->cryptoData, &dest);
1132 * Decodes the CryptoData structure. The length argument is
1133 * used to specify the size of data.
1135 * Returns: CRYPTO_SESSION instance on success.
1137 * Returns: CRYPTO_ERROR_NONE and a pointer to a newly allocated CRYPTO_SESSION structure in *session on success.
1138 * A crypto_error_t value on failure.
1140 crypto_error_t crypto_session_decode(const uint8_t *data, uint32_t length, alist *keypairs, CRYPTO_SESSION **session)
1143 X509_KEYPAIR *keypair;
1144 STACK_OF(RecipientInfo) *recipients;
1145 crypto_error_t retval = CRYPTO_ERROR_NONE;
1146 const unsigned char *p = (const unsigned char *)data;
1148 /* bacula-fd.conf doesn't contains any key */
1150 return CRYPTO_ERROR_NORECIPIENT;
1153 cs = (CRYPTO_SESSION *)malloc(sizeof(CRYPTO_SESSION));
1155 /* Initialize required fields */
1156 cs->session_key = NULL;
1158 /* d2i_CryptoData modifies the supplied pointer */
1159 cs->cryptoData = d2i_CryptoData(NULL, &p, length);
1161 if (!cs->cryptoData) {
1162 /* Allocation / Decoding failed in OpenSSL */
1163 openssl_post_errors(M_ERROR, _("CryptoData decoding failed"));
1164 retval = CRYPTO_ERROR_INTERNAL;
1168 recipients = cs->cryptoData->recipientInfo;
1171 * Find a matching RecipientInfo structure for a supplied
1174 foreach_alist(keypair, keypairs) {
1178 /* Private key available? */
1179 if (keypair->privkey == NULL) {
1183 for (i = 0; i < sk_RecipientInfo_num(recipients); i++) {
1184 ri = sk_RecipientInfo_value(recipients, i);
1186 /* Match against the subjectKeyIdentifier */
1187 if (M_ASN1_OCTET_STRING_cmp(keypair->keyid, ri->subjectKeyIdentifier) == 0) {
1188 /* Match found, extract symmetric encryption session data */
1190 /* RSA is required. */
1191 assert(EVP_PKEY_type(keypair->privkey->type) == EVP_PKEY_RSA);
1193 /* If we recieve a RecipientInfo structure that does not use
1194 * RSA, return an error */
1195 if (OBJ_obj2nid(ri->keyEncryptionAlgorithm) != NID_rsaEncryption) {
1196 retval = CRYPTO_ERROR_INVALID_CRYPTO;
1200 /* Decrypt the session key */
1201 /* Allocate sufficient space for the largest possible decrypted data */
1202 cs->session_key = (unsigned char *)malloc(EVP_PKEY_size(keypair->privkey));
1203 cs->session_key_len = EVP_PKEY_decrypt(cs->session_key, M_ASN1_STRING_data(ri->encryptedKey),
1204 M_ASN1_STRING_length(ri->encryptedKey), keypair->privkey);
1206 if (cs->session_key_len <= 0) {
1207 openssl_post_errors(M_ERROR, _("Failure decrypting the session key"));
1208 retval = CRYPTO_ERROR_DECRYPTION;
1212 /* Session key successfully extracted, return the CRYPTO_SESSION structure */
1214 return CRYPTO_ERROR_NONE;
1219 /* No matching recipient found */
1220 return CRYPTO_ERROR_NORECIPIENT;
1223 crypto_session_free(cs);
1228 * Free memory associated with a crypto session object.
1230 void crypto_session_free(CRYPTO_SESSION *cs)
1232 if (cs->cryptoData) {
1233 CryptoData_free(cs->cryptoData);
1235 if (cs->session_key){
1236 free(cs->session_key);
1242 * Create a new crypto cipher context with the specified session object
1243 * Returns: A pointer to a CIPHER_CONTEXT object on success. The cipher block size is returned in blocksize.
1246 CIPHER_CONTEXT *crypto_cipher_new(CRYPTO_SESSION *cs, bool encrypt, uint32_t *blocksize)
1248 CIPHER_CONTEXT *cipher_ctx;
1249 const EVP_CIPHER *ec;
1251 cipher_ctx = (CIPHER_CONTEXT *)malloc(sizeof(CIPHER_CONTEXT));
1254 * Acquire a cipher instance for the given ASN.1 cipher NID
1256 if ((ec = EVP_get_cipherbyobj(cs->cryptoData->contentEncryptionAlgorithm)) == NULL) {
1257 Jmsg1(NULL, M_ERROR, 0,
1258 _("Unsupported contentEncryptionAlgorithm: %d\n"), OBJ_obj2nid(cs->cryptoData->contentEncryptionAlgorithm));
1263 /* Initialize the OpenSSL cipher context */
1264 EVP_CIPHER_CTX_init(&cipher_ctx->ctx);
1266 /* Initialize for encryption */
1267 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, ec, NULL, NULL, NULL, 1)) {
1268 openssl_post_errors(M_ERROR, _("OpenSSL cipher context initialization failed"));
1272 /* Initialize for decryption */
1273 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, ec, NULL, NULL, NULL, 0)) {
1274 openssl_post_errors(M_ERROR, _("OpenSSL cipher context initialization failed"));
1279 /* Set the key size */
1280 if (!EVP_CIPHER_CTX_set_key_length(&cipher_ctx->ctx, cs->session_key_len)) {
1281 openssl_post_errors(M_ERROR, _("Encryption session provided an invalid symmetric key"));
1285 /* Validate the IV length */
1286 if (EVP_CIPHER_iv_length(ec) != M_ASN1_STRING_length(cs->cryptoData->iv)) {
1287 openssl_post_errors(M_ERROR, _("Encryption session provided an invalid IV"));
1291 /* Add the key and IV to the cipher context */
1292 if (!EVP_CipherInit_ex(&cipher_ctx->ctx, NULL, NULL, cs->session_key, M_ASN1_STRING_data(cs->cryptoData->iv), -1)) {
1293 openssl_post_errors(M_ERROR, _("OpenSSL cipher context key/IV initialization failed"));
1297 *blocksize = EVP_CIPHER_CTX_block_size(&cipher_ctx->ctx);
1301 crypto_cipher_free(cipher_ctx);
1307 * Encrypt/Decrypt length bytes of data using the provided cipher context
1308 * Returns: true on success, number of bytes output in written
1311 bool crypto_cipher_update(CIPHER_CONTEXT *cipher_ctx, const uint8_t *data, uint32_t length, const uint8_t *dest, uint32_t *written)
1313 if (!EVP_CipherUpdate(&cipher_ctx->ctx, (unsigned char *)dest, (int *)written, (const unsigned char *)data, length)) {
1314 /* This really shouldn't fail */
1322 * Finalize the cipher context, writing any remaining data and necessary padding
1323 * to dest, and the size in written.
1324 * The result size will either be one block of data or zero.
1326 * Returns: true on success
1329 bool crypto_cipher_finalize (CIPHER_CONTEXT *cipher_ctx, uint8_t *dest, uint32_t *written)
1331 if (!EVP_CipherFinal_ex(&cipher_ctx->ctx, (unsigned char *)dest, (int *) written)) {
1332 /* This really shouldn't fail */
1341 * Free memory associated with a cipher context.
1343 void crypto_cipher_free (CIPHER_CONTEXT *cipher_ctx)
1345 EVP_CIPHER_CTX_cleanup(&cipher_ctx->ctx);
1351 #else /* HAVE_OPENSSL */
1352 # error No encryption library available
1353 #endif /* HAVE_OPENSSL */
1355 #else /* HAVE_CRYPTO */
1358 * Cryptography Support Disabled
1361 /* Message Digest Structure */
1363 crypto_digest_t type;
1371 /* Dummy Signature Structure */
1376 DIGEST *crypto_digest_new(JCR *jcr, crypto_digest_t type)
1380 digest = (DIGEST *)malloc(sizeof(DIGEST));
1381 digest->type = type;
1385 case CRYPTO_DIGEST_MD5:
1386 MD5Init(&digest->md5);
1388 case CRYPTO_DIGEST_SHA1:
1389 SHA1Init(&digest->sha1);
1392 Jmsg1(jcr, M_ERROR, 0, _("Unsupported digest type=%d specified\n"), type);
1400 bool crypto_digest_update(DIGEST *digest, const uint8_t *data, uint32_t length)
1402 switch (digest->type) {
1403 case CRYPTO_DIGEST_MD5:
1404 /* Doesn't return anything ... */
1405 MD5Update(&digest->md5, (unsigned char *) data, length);
1407 case CRYPTO_DIGEST_SHA1:
1409 if ((ret = SHA1Update(&digest->sha1, (const u_int8_t *) data, length)) == shaSuccess) {
1412 Jmsg1(NULL, M_ERROR, 0, _("SHA1Update() returned an error: %d\n"), ret);
1421 bool crypto_digest_finalize(DIGEST *digest, uint8_t *dest, uint32_t *length)
1423 switch (digest->type) {
1424 case CRYPTO_DIGEST_MD5:
1425 /* Guard against programmer error by either the API client or
1426 * an out-of-sync CRYPTO_DIGEST_MAX_SIZE */
1427 assert(*length >= CRYPTO_DIGEST_MD5_SIZE);
1428 *length = CRYPTO_DIGEST_MD5_SIZE;
1429 /* Doesn't return anything ... */
1430 MD5Final((unsigned char *)dest, &digest->md5);
1432 case CRYPTO_DIGEST_SHA1:
1433 /* Guard against programmer error by either the API client or
1434 * an out-of-sync CRYPTO_DIGEST_MAX_SIZE */
1435 assert(*length >= CRYPTO_DIGEST_SHA1_SIZE);
1436 *length = CRYPTO_DIGEST_SHA1_SIZE;
1437 if (SHA1Final(&digest->sha1, (u_int8_t *) dest) == shaSuccess) {
1450 void crypto_digest_free(DIGEST *digest)
1455 SIGNATURE *crypto_sign_new(JCR *jcr) { return NULL; }
1457 crypto_error_t crypto_sign_get_digest (SIGNATURE *sig, X509_KEYPAIR *keypair,
1458 crypto_digest_t &type, DIGEST **digest)
1459 { return CRYPTO_ERROR_INTERNAL; }
1461 crypto_error_t crypto_sign_verify (SIGNATURE *sig, X509_KEYPAIR *keypair, DIGEST *digest) { return CRYPTO_ERROR_INTERNAL; }
1463 int crypto_sign_add_signer (SIGNATURE *sig, DIGEST *digest, X509_KEYPAIR *keypair) { return false; }
1464 int crypto_sign_encode (SIGNATURE *sig, uint8_t *dest, uint32_t *length) { return false; }
1466 SIGNATURE *crypto_sign_decode (JCR *jcr, const uint8_t *sigData, uint32_t length) { return NULL; }
1467 void crypto_sign_free (SIGNATURE *sig) { }
1470 X509_KEYPAIR *crypto_keypair_new(void) { return NULL; }
1471 X509_KEYPAIR *crypto_keypair_dup (X509_KEYPAIR *keypair) { return NULL; }
1472 int crypto_keypair_load_cert (X509_KEYPAIR *keypair, const char *file) { return false; }
1473 bool crypto_keypair_has_key (const char *file) { return false; }
1474 int crypto_keypair_load_key (X509_KEYPAIR *keypair, const char *file, CRYPTO_PEM_PASSWD_CB *pem_callback, const void *pem_userdata) { return false; }
1475 void crypto_keypair_free (X509_KEYPAIR *keypair) { }
1477 CRYPTO_SESSION *crypto_session_new (crypto_cipher_t cipher, alist *pubkeys) { return NULL; }
1478 void crypto_session_free (CRYPTO_SESSION *cs) { }
1479 bool crypto_session_encode (CRYPTO_SESSION *cs, uint8_t *dest, uint32_t *length) { return false; }
1480 crypto_error_t crypto_session_decode(const uint8_t *data, uint32_t length, alist *keypairs, CRYPTO_SESSION **session) { return CRYPTO_ERROR_INTERNAL; }
1482 CIPHER_CONTEXT *crypto_cipher_new (CRYPTO_SESSION *cs, bool encrypt, uint32_t *blocksize) { return NULL; }
1483 bool crypto_cipher_update (CIPHER_CONTEXT *cipher_ctx, const uint8_t *data, uint32_t length, const uint8_t *dest, uint32_t *written) { return false; }
1484 bool crypto_cipher_finalize (CIPHER_CONTEXT *cipher_ctx, uint8_t *dest, uint32_t *written) { return false; }
1485 void crypto_cipher_free (CIPHER_CONTEXT *cipher_ctx) { }
1487 #endif /* HAVE_CRYPTO */
1492 * Default PEM encryption passphrase callback.
1493 * Returns an empty password.
1495 int crypto_default_pem_callback(char *buf, int size, const void *userdata)
1497 bstrncpy(buf, "", size);
1498 return (strlen(buf));
1502 * Returns the ASCII name of the digest type.
1503 * Returns: ASCII name of digest type.
1505 const char *crypto_digest_name(DIGEST *digest)
1507 switch (digest->type) {
1508 case CRYPTO_DIGEST_MD5:
1510 case CRYPTO_DIGEST_SHA1:
1512 case CRYPTO_DIGEST_SHA256:
1514 case CRYPTO_DIGEST_SHA512:
1516 case CRYPTO_DIGEST_NONE:
1519 return "Invalid Digest Type";
1525 * Given a stream type, returns the associated
1526 * crypto_digest_t value.
1528 crypto_digest_t crypto_digest_stream_type(int stream)
1531 case STREAM_MD5_DIGEST:
1532 return CRYPTO_DIGEST_MD5;
1533 case STREAM_SHA1_DIGEST:
1534 return CRYPTO_DIGEST_SHA1;
1535 case STREAM_SHA256_DIGEST:
1536 return CRYPTO_DIGEST_SHA256;
1537 case STREAM_SHA512_DIGEST:
1538 return CRYPTO_DIGEST_SHA512;
1540 return CRYPTO_DIGEST_NONE;
1545 * * Given a crypto_error_t value, return the associated
1548 const char *crypto_strerror(crypto_error_t error) {
1550 case CRYPTO_ERROR_NONE:
1551 return _("No error");
1552 case CRYPTO_ERROR_NOSIGNER:
1553 return _("Signer not found");
1554 case CRYPTO_ERROR_NORECIPIENT:
1555 return _("Recipient not found");
1556 case CRYPTO_ERROR_INVALID_DIGEST:
1557 return _("Unsupported digest algorithm");
1558 case CRYPTO_ERROR_INVALID_CRYPTO:
1559 return _("Unsupported encryption algorithm");
1560 case CRYPTO_ERROR_BAD_SIGNATURE:
1561 return _("Signature is invalid");
1562 case CRYPTO_ERROR_DECRYPTION:
1563 return _("Decryption error");
1564 case CRYPTO_ERROR_INTERNAL:
1565 /* This shouldn't happen */
1566 return _("Internal error");
1568 return _("Unknown error");