2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 2005 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
60 * Support for PVK format keys and related structures (such a PUBLICKEYBLOB
61 * and PRIVATEKEYBLOB).
65 #include <openssl/pem.h>
66 #include <openssl/rand.h>
67 #include <openssl/bn.h>
68 #if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)
69 # include <openssl/dsa.h>
70 # include <openssl/rsa.h>
73 * Utility function: read a DWORD (4 byte unsigned integer) in little endian
77 static unsigned int read_ledword(const unsigned char **in)
79 const unsigned char *p = *in;
90 * Read a BIGNUM in little endian format. The docs say that this should take
94 static int read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r)
96 const unsigned char *p;
97 unsigned char *tmpbuf, *q;
100 tmpbuf = OPENSSL_malloc(nbyte);
104 for (i = 0; i < nbyte; i++)
106 *r = BN_bin2bn(tmpbuf, nbyte, NULL);
107 OPENSSL_free(tmpbuf);
115 /* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */
117 # define MS_PUBLICKEYBLOB 0x6
118 # define MS_PRIVATEKEYBLOB 0x7
119 # define MS_RSA1MAGIC 0x31415352L
120 # define MS_RSA2MAGIC 0x32415352L
121 # define MS_DSS1MAGIC 0x31535344L
122 # define MS_DSS2MAGIC 0x32535344L
124 # define MS_KEYALG_RSA_KEYX 0xa400
125 # define MS_KEYALG_DSS_SIGN 0x2200
127 # define MS_KEYTYPE_KEYX 0x1
128 # define MS_KEYTYPE_SIGN 0x2
130 /* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */
131 # define MS_PVKMAGIC 0xb0b5f11eL
132 /* Salt length for PVK files */
133 # define PVK_SALTLEN 0x10
135 static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length,
136 unsigned int bitlen, int ispub);
137 static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length,
138 unsigned int bitlen, int ispub);
140 static int do_blob_header(const unsigned char **in, unsigned int length,
141 unsigned int *pmagic, unsigned int *pbitlen,
142 int *pisdss, int *pispub)
144 const unsigned char *p = *in;
148 if (*p == MS_PUBLICKEYBLOB) {
150 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
154 } else if (*p == MS_PRIVATEKEYBLOB) {
156 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
165 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);
168 /* Ignore reserved, aiKeyAlg */
170 *pmagic = read_ledword(&p);
171 *pbitlen = read_ledword(&p);
179 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
188 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
194 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
201 static unsigned int blob_length(unsigned bitlen, int isdss, int ispub)
203 unsigned int nbyte, hnbyte;
204 nbyte = (bitlen + 7) >> 3;
205 hnbyte = (bitlen + 15) >> 4;
209 * Expected length: 20 for q + 3 components bitlen each + 24 for seed
213 return 44 + 3 * nbyte;
215 * Expected length: 20 for q, priv, 2 bitlen components + 24 for seed
219 return 64 + 2 * nbyte;
221 /* Expected length: 4 for 'e' + 'n' */
226 * Expected length: 4 for 'e' and 7 other components. 2
227 * components are bitlen size, 5 are bitlen/2
229 return 4 + 2 * nbyte + 5 * hnbyte;
234 static EVP_PKEY *do_b2i(const unsigned char **in, unsigned int length,
237 const unsigned char *p = *in;
238 unsigned int bitlen, magic;
240 if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0) {
241 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);
245 if (length < blob_length(bitlen, isdss, ispub)) {
246 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);
250 return b2i_dss(&p, length, bitlen, ispub);
252 return b2i_rsa(&p, length, bitlen, ispub);
255 static EVP_PKEY *do_b2i_bio(BIO *in, int ispub)
257 const unsigned char *p;
258 unsigned char hdr_buf[16], *buf = NULL;
259 unsigned int bitlen, magic, length;
261 EVP_PKEY *ret = NULL;
262 if (BIO_read(in, hdr_buf, 16) != 16) {
263 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
267 if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)
270 length = blob_length(bitlen, isdss, ispub);
271 buf = OPENSSL_malloc(length);
273 PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);
277 if (BIO_read(in, buf, length) != (int)length) {
278 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
283 ret = b2i_dss(&p, length, bitlen, ispub);
285 ret = b2i_rsa(&p, length, bitlen, ispub);
293 static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length,
294 unsigned int bitlen, int ispub)
296 const unsigned char *p = *in;
297 EVP_PKEY *ret = NULL;
301 nbyte = (bitlen + 7) >> 3;
304 ret = EVP_PKEY_new();
307 if (!read_lebn(&p, nbyte, &dsa->p))
309 if (!read_lebn(&p, 20, &dsa->q))
311 if (!read_lebn(&p, nbyte, &dsa->g))
314 if (!read_lebn(&p, nbyte, &dsa->pub_key))
317 if (!read_lebn(&p, 20, &dsa->priv_key))
319 /* Calculate public key */
320 if (!(dsa->pub_key = BN_new()))
322 if (!(ctx = BN_CTX_new()))
325 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
331 EVP_PKEY_set1_DSA(ret, dsa);
337 PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
344 static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length,
345 unsigned int bitlen, int ispub)
347 const unsigned char *p = *in;
348 EVP_PKEY *ret = NULL;
350 unsigned int nbyte, hnbyte;
351 nbyte = (bitlen + 7) >> 3;
352 hnbyte = (bitlen + 15) >> 4;
354 ret = EVP_PKEY_new();
360 if (!BN_set_word(rsa->e, read_ledword(&p)))
362 if (!read_lebn(&p, nbyte, &rsa->n))
365 if (!read_lebn(&p, hnbyte, &rsa->p))
367 if (!read_lebn(&p, hnbyte, &rsa->q))
369 if (!read_lebn(&p, hnbyte, &rsa->dmp1))
371 if (!read_lebn(&p, hnbyte, &rsa->dmq1))
373 if (!read_lebn(&p, hnbyte, &rsa->iqmp))
375 if (!read_lebn(&p, nbyte, &rsa->d))
379 EVP_PKEY_set1_RSA(ret, rsa);
384 PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
390 EVP_PKEY *b2i_PrivateKey(const unsigned char **in, long length)
392 return do_b2i(in, length, 0);
395 EVP_PKEY *b2i_PublicKey(const unsigned char **in, long length)
397 return do_b2i(in, length, 1);
400 EVP_PKEY *b2i_PrivateKey_bio(BIO *in)
402 return do_b2i_bio(in, 0);
405 EVP_PKEY *b2i_PublicKey_bio(BIO *in)
407 return do_b2i_bio(in, 1);
410 static void write_ledword(unsigned char **out, unsigned int dw)
412 unsigned char *p = *out;
414 *p++ = (dw >> 8) & 0xff;
415 *p++ = (dw >> 16) & 0xff;
416 *p++ = (dw >> 24) & 0xff;
420 static void write_lebn(unsigned char **out, const BIGNUM *bn, int len)
423 unsigned char *p = *out, *q, c;
424 nb = BN_num_bytes(bn);
427 /* In place byte order reversal */
428 for (i = 0; i < nb / 2; i++) {
434 /* Pad with zeroes if we have to */
438 memset(*out, 0, len);
444 static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic);
445 static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic);
447 static void write_rsa(unsigned char **out, RSA *rsa, int ispub);
448 static void write_dsa(unsigned char **out, DSA *dsa, int ispub);
450 static int do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub)
453 unsigned int bitlen, magic = 0, keyalg;
454 int outlen, noinc = 0;
455 if (pk->type == EVP_PKEY_DSA) {
456 bitlen = check_bitlen_dsa(pk->pkey.dsa, ispub, &magic);
457 keyalg = MS_KEYALG_DSS_SIGN;
458 } else if (pk->type == EVP_PKEY_RSA) {
459 bitlen = check_bitlen_rsa(pk->pkey.rsa, ispub, &magic);
460 keyalg = MS_KEYALG_RSA_KEYX;
465 outlen = 16 + blob_length(bitlen,
466 keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);
472 p = OPENSSL_malloc(outlen);
479 *p++ = MS_PUBLICKEYBLOB;
481 *p++ = MS_PRIVATEKEYBLOB;
485 write_ledword(&p, keyalg);
486 write_ledword(&p, magic);
487 write_ledword(&p, bitlen);
488 if (keyalg == MS_KEYALG_DSS_SIGN)
489 write_dsa(&p, pk->pkey.dsa, ispub);
491 write_rsa(&p, pk->pkey.rsa, ispub);
497 static int do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub)
499 unsigned char *tmp = NULL;
501 outlen = do_i2b(&tmp, pk, ispub);
504 wrlen = BIO_write(out, tmp, outlen);
511 static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic)
514 bitlen = BN_num_bits(dsa->p);
515 if ((bitlen & 7) || (BN_num_bits(dsa->q) != 160)
516 || (BN_num_bits(dsa->g) > bitlen))
519 if (BN_num_bits(dsa->pub_key) > bitlen)
521 *pmagic = MS_DSS1MAGIC;
523 if (BN_num_bits(dsa->priv_key) > 160)
525 *pmagic = MS_DSS2MAGIC;
530 PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
534 static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic)
536 int nbyte, hnbyte, bitlen;
537 if (BN_num_bits(rsa->e) > 32)
539 bitlen = BN_num_bits(rsa->n);
540 nbyte = BN_num_bytes(rsa->n);
541 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
543 *pmagic = MS_RSA1MAGIC;
546 *pmagic = MS_RSA2MAGIC;
548 * For private key each component must fit within nbyte or hnbyte.
550 if (BN_num_bytes(rsa->d) > nbyte)
552 if ((BN_num_bytes(rsa->iqmp) > hnbyte)
553 || (BN_num_bytes(rsa->p) > hnbyte)
554 || (BN_num_bytes(rsa->q) > hnbyte)
555 || (BN_num_bytes(rsa->dmp1) > hnbyte)
556 || (BN_num_bytes(rsa->dmq1) > hnbyte))
561 PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
565 static void write_rsa(unsigned char **out, RSA *rsa, int ispub)
568 nbyte = BN_num_bytes(rsa->n);
569 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
570 write_lebn(out, rsa->e, 4);
571 write_lebn(out, rsa->n, -1);
574 write_lebn(out, rsa->p, hnbyte);
575 write_lebn(out, rsa->q, hnbyte);
576 write_lebn(out, rsa->dmp1, hnbyte);
577 write_lebn(out, rsa->dmq1, hnbyte);
578 write_lebn(out, rsa->iqmp, hnbyte);
579 write_lebn(out, rsa->d, nbyte);
582 static void write_dsa(unsigned char **out, DSA *dsa, int ispub)
585 nbyte = BN_num_bytes(dsa->p);
586 write_lebn(out, dsa->p, nbyte);
587 write_lebn(out, dsa->q, 20);
588 write_lebn(out, dsa->g, nbyte);
590 write_lebn(out, dsa->pub_key, nbyte);
592 write_lebn(out, dsa->priv_key, 20);
593 /* Set "invalid" for seed structure values */
594 memset(*out, 0xff, 24);
599 int i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk)
601 return do_i2b_bio(out, pk, 0);
604 int i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk)
606 return do_i2b_bio(out, pk, 1);
609 # ifndef OPENSSL_NO_RC4
611 static int do_PVK_header(const unsigned char **in, unsigned int length,
613 unsigned int *psaltlen, unsigned int *pkeylen)
615 const unsigned char *p = *in;
616 unsigned int pvk_magic, is_encrypted;
619 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
625 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
629 pvk_magic = read_ledword(&p);
630 if (pvk_magic != MS_PVKMAGIC) {
631 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER);
640 is_encrypted = read_ledword(&p);
641 *psaltlen = read_ledword(&p);
642 *pkeylen = read_ledword(&p);
644 if (is_encrypted && !*psaltlen) {
645 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER);
653 static int derive_pvk_key(unsigned char *key,
654 const unsigned char *salt, unsigned int saltlen,
655 const unsigned char *pass, int passlen)
659 EVP_MD_CTX_init(&mctx);
660 if (!EVP_DigestInit_ex(&mctx, EVP_sha1(), NULL)
661 || !EVP_DigestUpdate(&mctx, salt, saltlen)
662 || !EVP_DigestUpdate(&mctx, pass, passlen)
663 || !EVP_DigestFinal_ex(&mctx, key, NULL))
666 EVP_MD_CTX_cleanup(&mctx);
670 static EVP_PKEY *do_PVK_body(const unsigned char **in,
671 unsigned int saltlen, unsigned int keylen,
672 pem_password_cb *cb, void *u)
674 EVP_PKEY *ret = NULL;
675 const unsigned char *p = *in;
677 unsigned char *enctmp = NULL, *q;
679 EVP_CIPHER_CTX_init(&cctx);
681 char psbuf[PEM_BUFSIZE];
682 unsigned char keybuf[20];
683 int enctmplen, inlen;
685 inlen = cb(psbuf, PEM_BUFSIZE, 0, u);
687 inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
689 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_PASSWORD_READ);
692 enctmp = OPENSSL_malloc(keylen + 8);
694 PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
697 if (!derive_pvk_key(keybuf, p, saltlen,
698 (unsigned char *)psbuf, inlen))
701 /* Copy BLOBHEADER across, decrypt rest */
702 memcpy(enctmp, p, 8);
705 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT);
710 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
712 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
714 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen))
716 magic = read_ledword((const unsigned char **)&q);
717 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
719 memset(keybuf + 5, 0, 11);
720 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
722 OPENSSL_cleanse(keybuf, 20);
723 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
725 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen))
727 magic = read_ledword((const unsigned char **)&q);
728 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
729 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);
733 OPENSSL_cleanse(keybuf, 20);
737 ret = b2i_PrivateKey(&p, keylen);
739 EVP_CIPHER_CTX_cleanup(&cctx);
740 if (enctmp && saltlen)
741 OPENSSL_free(enctmp);
745 EVP_PKEY *b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u)
747 unsigned char pvk_hdr[24], *buf = NULL;
748 const unsigned char *p;
750 EVP_PKEY *ret = NULL;
751 unsigned int saltlen, keylen;
752 if (BIO_read(in, pvk_hdr, 24) != 24) {
753 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
758 if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen))
760 buflen = (int)keylen + saltlen;
761 buf = OPENSSL_malloc(buflen);
763 PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE);
767 if (BIO_read(in, buf, buflen) != buflen) {
768 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
771 ret = do_PVK_body(&p, saltlen, keylen, cb, u);
774 OPENSSL_clear_free(buf, buflen);
778 static int i2b_PVK(unsigned char **out, EVP_PKEY *pk, int enclevel,
779 pem_password_cb *cb, void *u)
781 int outlen = 24, pklen;
782 unsigned char *p, *salt = NULL;
784 EVP_CIPHER_CTX_init(&cctx);
786 outlen += PVK_SALTLEN;
787 pklen = do_i2b(NULL, pk, 0);
796 p = OPENSSL_malloc(outlen);
798 PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE);
804 write_ledword(&p, MS_PVKMAGIC);
805 write_ledword(&p, 0);
806 if (pk->type == EVP_PKEY_DSA)
807 write_ledword(&p, MS_KEYTYPE_SIGN);
809 write_ledword(&p, MS_KEYTYPE_KEYX);
810 write_ledword(&p, enclevel ? 1 : 0);
811 write_ledword(&p, enclevel ? PVK_SALTLEN : 0);
812 write_ledword(&p, pklen);
814 if (RAND_bytes(p, PVK_SALTLEN) <= 0)
823 char psbuf[PEM_BUFSIZE];
824 unsigned char keybuf[20];
825 int enctmplen, inlen;
827 inlen = cb(psbuf, PEM_BUFSIZE, 1, u);
829 inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 1, u);
831 PEMerr(PEM_F_I2B_PVK, PEM_R_BAD_PASSWORD_READ);
834 if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,
835 (unsigned char *)psbuf, inlen))
838 memset(keybuf + 5, 0, 11);
839 p = salt + PVK_SALTLEN + 8;
840 if (!EVP_EncryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
842 OPENSSL_cleanse(keybuf, 20);
843 if (!EVP_DecryptUpdate(&cctx, p, &enctmplen, p, pklen - 8))
845 if (!EVP_DecryptFinal_ex(&cctx, p + enctmplen, &enctmplen))
848 EVP_CIPHER_CTX_cleanup(&cctx);
852 EVP_CIPHER_CTX_cleanup(&cctx);
856 int i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel,
857 pem_password_cb *cb, void *u)
859 unsigned char *tmp = NULL;
861 outlen = i2b_PVK(&tmp, pk, enclevel, cb, u);
864 wrlen = BIO_write(out, tmp, outlen);
866 if (wrlen == outlen) {
867 PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE);