1 /* $OpenBSD: pvkfmt.c,v 1.15 2016/03/02 05:02:35 beck Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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).
59 /* Support for PVK format keys and related structures (such a PUBLICKEYBLOB
60 * and PRIVATEKEYBLOB).
66 #include <openssl/opensslconf.h>
68 #include <openssl/bn.h>
69 #include <openssl/err.h>
70 #include <openssl/pem.h>
72 #if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)
73 #include <openssl/dsa.h>
74 #include <openssl/rsa.h>
76 /* Utility function: read a DWORD (4 byte unsigned integer) in little endian
81 read_ledword(const unsigned char **in)
83 const unsigned char *p = *in;
94 /* Read a BIGNUM in little endian format. The docs say that this should take up
99 read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r)
101 const unsigned char *p;
102 unsigned char *tmpbuf, *q;
106 tmpbuf = malloc(nbyte);
110 for (i = 0; i < nbyte; i++)
112 *r = BN_bin2bn(tmpbuf, nbyte, NULL);
122 /* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */
124 #define MS_PUBLICKEYBLOB 0x6
125 #define MS_PRIVATEKEYBLOB 0x7
126 #define MS_RSA1MAGIC 0x31415352L
127 #define MS_RSA2MAGIC 0x32415352L
128 #define MS_DSS1MAGIC 0x31535344L
129 #define MS_DSS2MAGIC 0x32535344L
131 #define MS_KEYALG_RSA_KEYX 0xa400
132 #define MS_KEYALG_DSS_SIGN 0x2200
134 #define MS_KEYTYPE_KEYX 0x1
135 #define MS_KEYTYPE_SIGN 0x2
137 /* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */
138 #define MS_PVKMAGIC 0xb0b5f11eL
139 /* Salt length for PVK files */
140 #define PVK_SALTLEN 0x10
142 static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length,
143 unsigned int bitlen, int ispub);
144 static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length,
145 unsigned int bitlen, int ispub);
148 do_blob_header(const unsigned char **in, unsigned int length,
149 unsigned int *pmagic, unsigned int *pbitlen, int *pisdss, int *pispub)
151 const unsigned char *p = *in;
156 if (*p == MS_PUBLICKEYBLOB) {
158 PEMerr(PEM_F_DO_BLOB_HEADER,
159 PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
163 } else if (*p == MS_PRIVATEKEYBLOB) {
165 PEMerr(PEM_F_DO_BLOB_HEADER,
166 PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
175 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);
178 /* Ignore reserved, aiKeyAlg */
180 *pmagic = read_ledword(&p);
181 *pbitlen = read_ledword(&p);
182 if (*pbitlen > 65536) {
183 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_INCONSISTENT_HEADER);
193 PEMerr(PEM_F_DO_BLOB_HEADER,
194 PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
203 PEMerr(PEM_F_DO_BLOB_HEADER,
204 PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
210 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
218 blob_length(unsigned bitlen, int isdss, int ispub)
220 unsigned int nbyte, hnbyte;
222 nbyte = (bitlen + 7) >> 3;
223 hnbyte = (bitlen + 15) >> 4;
226 /* Expected length: 20 for q + 3 components bitlen each + 24
227 * for seed structure.
230 return 44 + 3 * nbyte;
231 /* Expected length: 20 for q, priv, 2 bitlen components + 24
232 * for seed structure.
235 return 64 + 2 * nbyte;
237 /* Expected length: 4 for 'e' + 'n' */
241 /* Expected length: 4 for 'e' and 7 other components.
242 * 2 components are bitlen size, 5 are bitlen/2
244 return 4 + 2*nbyte + 5*hnbyte;
250 do_b2i(const unsigned char **in, unsigned int length, int ispub)
252 const unsigned char *p = *in;
253 unsigned int bitlen, magic;
256 if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0) {
257 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);
261 if (length < blob_length(bitlen, isdss, ispub)) {
262 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);
266 return b2i_dss(&p, length, bitlen, ispub);
268 return b2i_rsa(&p, length, bitlen, ispub);
272 do_b2i_bio(BIO *in, int ispub)
274 const unsigned char *p;
275 unsigned char hdr_buf[16], *buf = NULL;
276 unsigned int bitlen, magic, length;
278 EVP_PKEY *ret = NULL;
280 if (BIO_read(in, hdr_buf, 16) != 16) {
281 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
285 if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)
288 length = blob_length(bitlen, isdss, ispub);
289 buf = malloc(length);
291 PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);
295 if (BIO_read(in, buf, length) != (int)length) {
296 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
301 ret = b2i_dss(&p, length, bitlen, ispub);
303 ret = b2i_rsa(&p, length, bitlen, ispub);
311 b2i_dss(const unsigned char **in, unsigned int length, unsigned int bitlen,
314 const unsigned char *p = *in;
315 EVP_PKEY *ret = NULL;
320 nbyte = (bitlen + 7) >> 3;
323 ret = EVP_PKEY_new();
326 if (!read_lebn(&p, nbyte, &dsa->p))
328 if (!read_lebn(&p, 20, &dsa->q))
330 if (!read_lebn(&p, nbyte, &dsa->g))
333 if (!read_lebn(&p, nbyte, &dsa->pub_key))
336 if (!read_lebn(&p, 20, &dsa->priv_key))
338 /* Calculate public key */
339 if (!(dsa->pub_key = BN_new()))
341 if (!(ctx = BN_CTX_new()))
343 if (!BN_mod_exp(dsa->pub_key, dsa->g,
344 dsa->priv_key, dsa->p, ctx))
349 EVP_PKEY_set1_DSA(ret, dsa);
355 PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
363 b2i_rsa(const unsigned char **in, unsigned int length, unsigned int bitlen,
366 const unsigned char *p = *in;
367 EVP_PKEY *ret = NULL;
369 unsigned int nbyte, hnbyte;
371 nbyte = (bitlen + 7) >> 3;
372 hnbyte = (bitlen + 15) >> 4;
374 ret = EVP_PKEY_new();
380 if (!BN_set_word(rsa->e, read_ledword(&p)))
382 if (!read_lebn(&p, nbyte, &rsa->n))
385 if (!read_lebn(&p, hnbyte, &rsa->p))
387 if (!read_lebn(&p, hnbyte, &rsa->q))
389 if (!read_lebn(&p, hnbyte, &rsa->dmp1))
391 if (!read_lebn(&p, hnbyte, &rsa->dmq1))
393 if (!read_lebn(&p, hnbyte, &rsa->iqmp))
395 if (!read_lebn(&p, nbyte, &rsa->d))
399 EVP_PKEY_set1_RSA(ret, rsa);
405 PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
412 b2i_PrivateKey(const unsigned char **in, long length)
414 return do_b2i(in, length, 0);
418 b2i_PublicKey(const unsigned char **in, long length)
420 return do_b2i(in, length, 1);
424 b2i_PrivateKey_bio(BIO *in)
426 return do_b2i_bio(in, 0);
430 b2i_PublicKey_bio(BIO *in)
432 return do_b2i_bio(in, 1);
436 write_ledword(unsigned char **out, unsigned int dw)
438 unsigned char *p = *out;
441 *p++ = (dw >> 8) & 0xff;
442 *p++ = (dw >> 16) & 0xff;
443 *p++ = (dw >> 24) & 0xff;
448 write_lebn(unsigned char **out, const BIGNUM *bn, int len)
451 unsigned char *p = *out, *q, c;
453 nb = BN_num_bytes(bn);
456 /* In place byte order reversal */
457 for (i = 0; i < nb / 2; i++) {
463 /* Pad with zeroes if we have to */
467 memset(*out, 0, len);
474 static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic);
475 static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic);
477 static void write_rsa(unsigned char **out, RSA *rsa, int ispub);
478 static void write_dsa(unsigned char **out, DSA *dsa, int ispub);
481 do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub)
484 unsigned int bitlen, magic = 0, keyalg;
485 int outlen, noinc = 0;
487 if (pk->type == EVP_PKEY_DSA) {
488 bitlen = check_bitlen_dsa(pk->pkey.dsa, ispub, &magic);
489 keyalg = MS_KEYALG_DSS_SIGN;
490 } else if (pk->type == EVP_PKEY_RSA) {
491 bitlen = check_bitlen_rsa(pk->pkey.rsa, ispub, &magic);
492 keyalg = MS_KEYALG_RSA_KEYX;
497 outlen = 16 + blob_length(bitlen,
498 keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);
511 *p++ = MS_PUBLICKEYBLOB;
513 *p++ = MS_PRIVATEKEYBLOB;
517 write_ledword(&p, keyalg);
518 write_ledword(&p, magic);
519 write_ledword(&p, bitlen);
520 if (keyalg == MS_KEYALG_DSS_SIGN)
521 write_dsa(&p, pk->pkey.dsa, ispub);
523 write_rsa(&p, pk->pkey.rsa, ispub);
530 do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub)
532 unsigned char *tmp = NULL;
535 outlen = do_i2b(&tmp, pk, ispub);
538 wrlen = BIO_write(out, tmp, outlen);
546 check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic)
550 bitlen = BN_num_bits(dsa->p);
551 if ((bitlen & 7) || (BN_num_bits(dsa->q) != 160) ||
552 (BN_num_bits(dsa->g) > bitlen))
555 if (BN_num_bits(dsa->pub_key) > bitlen)
557 *pmagic = MS_DSS1MAGIC;
559 if (BN_num_bits(dsa->priv_key) > 160)
561 *pmagic = MS_DSS2MAGIC;
567 PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
572 check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic)
574 int nbyte, hnbyte, bitlen;
576 if (BN_num_bits(rsa->e) > 32)
578 bitlen = BN_num_bits(rsa->n);
579 nbyte = BN_num_bytes(rsa->n);
580 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
582 *pmagic = MS_RSA1MAGIC;
585 *pmagic = MS_RSA2MAGIC;
586 /* For private key each component must fit within nbyte or
589 if (BN_num_bytes(rsa->d) > nbyte)
591 if ((BN_num_bytes(rsa->iqmp) > hnbyte) ||
592 (BN_num_bytes(rsa->p) > hnbyte) ||
593 (BN_num_bytes(rsa->q) > hnbyte) ||
594 (BN_num_bytes(rsa->dmp1) > hnbyte) ||
595 (BN_num_bytes(rsa->dmq1) > hnbyte))
601 PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
606 write_rsa(unsigned char **out, RSA *rsa, int ispub)
610 nbyte = BN_num_bytes(rsa->n);
611 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
612 write_lebn(out, rsa->e, 4);
613 write_lebn(out, rsa->n, -1);
616 write_lebn(out, rsa->p, hnbyte);
617 write_lebn(out, rsa->q, hnbyte);
618 write_lebn(out, rsa->dmp1, hnbyte);
619 write_lebn(out, rsa->dmq1, hnbyte);
620 write_lebn(out, rsa->iqmp, hnbyte);
621 write_lebn(out, rsa->d, nbyte);
625 write_dsa(unsigned char **out, DSA *dsa, int ispub)
629 nbyte = BN_num_bytes(dsa->p);
630 write_lebn(out, dsa->p, nbyte);
631 write_lebn(out, dsa->q, 20);
632 write_lebn(out, dsa->g, nbyte);
634 write_lebn(out, dsa->pub_key, nbyte);
636 write_lebn(out, dsa->priv_key, 20);
637 /* Set "invalid" for seed structure values */
638 memset(*out, 0xff, 24);
644 i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk)
646 return do_i2b_bio(out, pk, 0);
650 i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk)
652 return do_i2b_bio(out, pk, 1);
655 #ifndef OPENSSL_NO_RC4
658 do_PVK_header(const unsigned char **in, unsigned int length, int skip_magic,
659 unsigned int *psaltlen, unsigned int *pkeylen)
661 const unsigned char *p = *in;
662 unsigned int pvk_magic, is_encrypted;
666 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
672 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
676 pvk_magic = read_ledword(&p);
677 if (pvk_magic != MS_PVKMAGIC) {
678 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER);
684 /*keytype = */read_ledword(&p);
685 is_encrypted = read_ledword(&p);
686 *psaltlen = read_ledword(&p);
687 *pkeylen = read_ledword(&p);
688 if (*psaltlen > 65536 || *pkeylen > 65536) {
689 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
693 if (is_encrypted && !*psaltlen) {
694 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER);
703 derive_pvk_key(unsigned char *key, const unsigned char *salt,
704 unsigned int saltlen, const unsigned char *pass, int passlen)
709 EVP_MD_CTX_init(&mctx);
710 if (!EVP_DigestInit_ex(&mctx, EVP_sha1(), NULL) ||
711 !EVP_DigestUpdate(&mctx, salt, saltlen) ||
712 !EVP_DigestUpdate(&mctx, pass, passlen) ||
713 !EVP_DigestFinal_ex(&mctx, key, NULL))
716 EVP_MD_CTX_cleanup(&mctx);
721 do_PVK_body(const unsigned char **in, unsigned int saltlen,
722 unsigned int keylen, pem_password_cb *cb, void *u)
724 EVP_PKEY *ret = NULL;
725 const unsigned char *p = *in;
727 unsigned char *enctmp = NULL, *q;
730 EVP_CIPHER_CTX_init(&cctx);
732 char psbuf[PEM_BUFSIZE];
733 unsigned char keybuf[20];
734 int enctmplen, inlen;
737 inlen = cb(psbuf, PEM_BUFSIZE, 0, u);
739 inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
741 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_PASSWORD_READ);
744 enctmp = malloc(keylen + 8);
746 PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
749 if (!derive_pvk_key(keybuf, p, saltlen, (unsigned char *)psbuf,
754 /* Copy BLOBHEADER across, decrypt rest */
755 memcpy(enctmp, p, 8);
758 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT);
763 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
765 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
767 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen))
769 magic = read_ledword((const unsigned char **)&q);
770 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
772 memset(keybuf + 5, 0, 11);
773 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf,
776 explicit_bzero(keybuf, 20);
777 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
779 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen,
782 magic = read_ledword((const unsigned char **)&q);
783 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
784 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);
788 explicit_bzero(keybuf, 20);
792 ret = b2i_PrivateKey(&p, keylen);
795 EVP_CIPHER_CTX_cleanup(&cctx);
796 if (enctmp && saltlen)
803 b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u)
805 unsigned char pvk_hdr[24], *buf = NULL;
806 const unsigned char *p;
808 EVP_PKEY *ret = NULL;
809 unsigned int saltlen, keylen;
811 if (BIO_read(in, pvk_hdr, 24) != 24) {
812 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
817 if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen))
819 buflen = keylen + saltlen;
820 buf = malloc(buflen);
822 PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE);
826 if (BIO_read(in, buf, buflen) != buflen) {
827 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
830 ret = do_PVK_body(&p, saltlen, keylen, cb, u);
834 explicit_bzero(buf, buflen);
841 i2b_PVK(unsigned char **out, EVP_PKEY*pk, int enclevel, pem_password_cb *cb,
844 int outlen = 24, pklen;
845 unsigned char *p, *salt = NULL;
848 EVP_CIPHER_CTX_init(&cctx);
850 outlen += PVK_SALTLEN;
851 pklen = do_i2b(NULL, pk, 0);
862 PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE);
868 write_ledword(&p, MS_PVKMAGIC);
869 write_ledword(&p, 0);
870 if (pk->type == EVP_PKEY_DSA)
871 write_ledword(&p, MS_KEYTYPE_SIGN);
873 write_ledword(&p, MS_KEYTYPE_KEYX);
874 write_ledword(&p, enclevel ? 1 : 0);
875 write_ledword(&p, enclevel ? PVK_SALTLEN : 0);
876 write_ledword(&p, pklen);
878 arc4random_buf(p, PVK_SALTLEN);
886 char psbuf[PEM_BUFSIZE];
887 unsigned char keybuf[20];
888 int enctmplen, inlen;
890 inlen = cb(psbuf, PEM_BUFSIZE, 1, u);
892 inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 1, u);
894 PEMerr(PEM_F_I2B_PVK, PEM_R_BAD_PASSWORD_READ);
897 if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,
898 (unsigned char *)psbuf, inlen))
901 memset(keybuf + 5, 0, 11);
902 p = salt + PVK_SALTLEN + 8;
903 if (!EVP_EncryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
905 explicit_bzero(keybuf, 20);
906 if (!EVP_DecryptUpdate(&cctx, p, &enctmplen, p, pklen - 8))
908 if (!EVP_DecryptFinal_ex(&cctx, p + enctmplen, &enctmplen))
911 EVP_CIPHER_CTX_cleanup(&cctx);
915 EVP_CIPHER_CTX_cleanup(&cctx);
920 i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel, pem_password_cb *cb, void *u)
922 unsigned char *tmp = NULL;
925 outlen = i2b_PVK(&tmp, pk, enclevel, cb, u);
928 wrlen = BIO_write(out, tmp, outlen);
930 if (wrlen == outlen) {
931 PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE);