1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 /* ====================================================================
5 * Copyright (c) 2005 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com).
58 /* Support for PVK format keys and related structures (such a PUBLICKEYBLOB
59 * and PRIVATEKEYBLOB).
63 #include <openssl/pem.h>
64 #include <openssl/rand.h>
65 #include <openssl/bn.h>
66 #if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)
67 #include <openssl/dsa.h>
68 #include <openssl/rsa.h>
70 /* Utility function: read a DWORD (4 byte unsigned integer) in little endian
74 static unsigned int read_ledword(const unsigned char **in)
76 const unsigned char *p = *in;
86 /* Read a BIGNUM in little endian format. The docs say that this should take up
90 static int read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r)
92 const unsigned char *p;
93 unsigned char *tmpbuf, *q;
96 tmpbuf = OPENSSL_malloc(nbyte);
100 for (i = 0; i < nbyte; i++)
102 *r = BN_bin2bn(tmpbuf, nbyte, NULL);
103 OPENSSL_free(tmpbuf);
114 /* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */
116 #define MS_PUBLICKEYBLOB 0x6
117 #define MS_PRIVATEKEYBLOB 0x7
118 #define MS_RSA1MAGIC 0x31415352L
119 #define MS_RSA2MAGIC 0x32415352L
120 #define MS_DSS1MAGIC 0x31535344L
121 #define MS_DSS2MAGIC 0x32535344L
123 #define MS_KEYALG_RSA_KEYX 0xa400
124 #define MS_KEYALG_DSS_SIGN 0x2200
126 #define MS_KEYTYPE_KEYX 0x1
127 #define MS_KEYTYPE_SIGN 0x2
129 /* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */
130 #define MS_PVKMAGIC 0xb0b5f11eL
131 /* Salt length for PVK files */
132 #define PVK_SALTLEN 0x10
134 static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length,
135 unsigned int bitlen, int ispub);
136 static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length,
137 unsigned int bitlen, int ispub);
139 static int do_blob_header(const unsigned char **in, unsigned int length,
140 unsigned int *pmagic, unsigned int *pbitlen,
141 int *pisdss, int *pispub)
143 const unsigned char *p = *in;
147 if (*p == MS_PUBLICKEYBLOB)
151 PEMerr(PEM_F_DO_BLOB_HEADER,
152 PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
157 else if (*p == MS_PRIVATEKEYBLOB)
161 PEMerr(PEM_F_DO_BLOB_HEADER,
162 PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
173 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);
176 /* Ignore reserved, aiKeyAlg */
178 *pmagic = read_ledword(&p);
179 *pbitlen = read_ledword(&p);
189 PEMerr(PEM_F_DO_BLOB_HEADER,
190 PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
200 PEMerr(PEM_F_DO_BLOB_HEADER,
201 PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
207 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
214 static unsigned int blob_length(unsigned bitlen, int isdss, int ispub)
216 unsigned int nbyte, hnbyte;
217 nbyte = (bitlen + 7) >> 3;
218 hnbyte = (bitlen + 15) >> 4;
222 /* Expected length: 20 for q + 3 components bitlen each + 24
223 * for seed structure.
226 return 44 + 3 * nbyte;
227 /* Expected length: 20 for q, priv, 2 bitlen components + 24
228 * for seed structure.
231 return 64 + 2 * nbyte;
235 /* Expected length: 4 for 'e' + 'n' */
239 /* Expected length: 4 for 'e' and 7 other components.
240 * 2 components are bitlen size, 5 are bitlen/2
242 return 4 + 2*nbyte + 5*hnbyte;
247 static EVP_PKEY *do_b2i(const unsigned char **in, unsigned int length,
250 const unsigned char *p = *in;
251 unsigned int bitlen, magic;
253 if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0)
255 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);
259 if (length < blob_length(bitlen, isdss, ispub))
261 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);
265 return b2i_dss(&p, length, bitlen, ispub);
267 return b2i_rsa(&p, length, bitlen, ispub);
270 static EVP_PKEY *do_b2i_bio(BIO *in, int ispub)
272 const unsigned char *p;
273 unsigned char hdr_buf[16], *buf = NULL;
274 unsigned int bitlen, magic, length;
276 EVP_PKEY *ret = NULL;
277 if (BIO_read(in, hdr_buf, 16) != 16)
279 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
283 if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)
286 length = blob_length(bitlen, isdss, ispub);
287 buf = OPENSSL_malloc(length);
290 PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);
294 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 static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length,
312 unsigned int bitlen, int ispub)
314 const unsigned char *p = *in;
315 EVP_PKEY *ret = NULL;
319 nbyte = (bitlen + 7) >> 3;
322 ret = EVP_PKEY_new();
325 if (!read_lebn(&p, nbyte, &dsa->p))
327 if (!read_lebn(&p, 20, &dsa->q))
329 if (!read_lebn(&p, nbyte, &dsa->g))
333 if (!read_lebn(&p, nbyte, &dsa->pub_key))
338 if (!read_lebn(&p, 20, &dsa->priv_key))
340 /* Calculate public key */
341 if (!(dsa->pub_key = BN_new()))
343 if (!(ctx = BN_CTX_new()))
346 if (!BN_mod_exp(dsa->pub_key, dsa->g,
347 dsa->priv_key, dsa->p, ctx))
353 EVP_PKEY_set1_DSA(ret, dsa);
359 PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
369 static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length,
370 unsigned int bitlen, int ispub)
373 const unsigned char *p = *in;
374 EVP_PKEY *ret = NULL;
376 unsigned int nbyte, hnbyte;
377 nbyte = (bitlen + 7) >> 3;
378 hnbyte = (bitlen + 15) >> 4;
380 ret = EVP_PKEY_new();
386 if (!BN_set_word(rsa->e, read_ledword(&p)))
388 if (!read_lebn(&p, nbyte, &rsa->n))
392 if (!read_lebn(&p, hnbyte, &rsa->p))
394 if (!read_lebn(&p, hnbyte, &rsa->q))
396 if (!read_lebn(&p, hnbyte, &rsa->dmp1))
398 if (!read_lebn(&p, hnbyte, &rsa->dmq1))
400 if (!read_lebn(&p, hnbyte, &rsa->iqmp))
402 if (!read_lebn(&p, nbyte, &rsa->d))
406 EVP_PKEY_set1_RSA(ret, rsa);
411 PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
419 EVP_PKEY *b2i_PrivateKey(const unsigned char **in, long length)
421 return do_b2i(in, length, 0);
424 EVP_PKEY *b2i_PublicKey(const unsigned char **in, long length)
426 return do_b2i(in, length, 1);
430 EVP_PKEY *b2i_PrivateKey_bio(BIO *in)
432 return do_b2i_bio(in, 0);
435 EVP_PKEY *b2i_PublicKey_bio(BIO *in)
437 return do_b2i_bio(in, 1);
440 static void write_ledword(unsigned char **out, unsigned int dw)
442 unsigned char *p = *out;
444 *p++ = (dw>>8) & 0xff;
445 *p++ = (dw>>16) & 0xff;
446 *p++ = (dw>>24) & 0xff;
450 static void write_lebn(unsigned char **out, const BIGNUM *bn, int len)
453 unsigned char *p = *out, *q, c;
454 nb = BN_num_bytes(bn);
457 /* In place byte order reversal */
458 for (i = 0; i < nb/2; i++)
465 /* Pad with zeroes if we have to */
471 memset(*out, 0, len);
478 static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic);
479 static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic);
481 static void write_rsa(unsigned char **out, RSA *rsa, int ispub);
482 static void write_dsa(unsigned char **out, DSA *dsa, int ispub);
484 static int do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub)
487 unsigned int bitlen, magic = 0, keyalg;
488 int outlen, noinc = 0;
489 if (pk->type == EVP_PKEY_DSA)
491 bitlen = check_bitlen_dsa(pk->pkey.dsa, ispub, &magic);
492 keyalg = MS_KEYALG_DSS_SIGN;
494 else if (pk->type == EVP_PKEY_RSA)
496 bitlen = check_bitlen_rsa(pk->pkey.rsa, ispub, &magic);
497 keyalg = MS_KEYALG_RSA_KEYX;
503 outlen = 16 + blob_length(bitlen,
504 keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);
511 p = OPENSSL_malloc(outlen);
518 *p++ = MS_PUBLICKEYBLOB;
520 *p++ = MS_PRIVATEKEYBLOB;
524 write_ledword(&p, keyalg);
525 write_ledword(&p, magic);
526 write_ledword(&p, bitlen);
527 if (keyalg == MS_KEYALG_DSS_SIGN)
528 write_dsa(&p, pk->pkey.dsa, ispub);
530 write_rsa(&p, pk->pkey.rsa, ispub);
536 static int do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub)
538 unsigned char *tmp = NULL;
540 outlen = do_i2b(&tmp, pk, ispub);
543 wrlen = BIO_write(out, tmp, outlen);
550 static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic)
553 bitlen = BN_num_bits(dsa->p);
554 if ((bitlen & 7) || (BN_num_bits(dsa->q) != 160)
555 || (BN_num_bits(dsa->g) > bitlen))
559 if (BN_num_bits(dsa->pub_key) > bitlen)
561 *pmagic = MS_DSS1MAGIC;
565 if (BN_num_bits(dsa->priv_key) > 160)
567 *pmagic = MS_DSS2MAGIC;
572 PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
576 static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic)
578 int nbyte, hnbyte, bitlen;
579 if (BN_num_bits(rsa->e) > 32)
581 bitlen = BN_num_bits(rsa->n);
582 nbyte = BN_num_bytes(rsa->n);
583 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
586 *pmagic = MS_RSA1MAGIC;
591 *pmagic = MS_RSA2MAGIC;
592 /* For private key each component must fit within nbyte or
595 if (BN_num_bytes(rsa->d) > nbyte)
597 if ((BN_num_bytes(rsa->iqmp) > hnbyte)
598 || (BN_num_bytes(rsa->p) > hnbyte)
599 || (BN_num_bytes(rsa->q) > hnbyte)
600 || (BN_num_bytes(rsa->dmp1) > hnbyte)
601 || (BN_num_bytes(rsa->dmq1) > hnbyte))
606 PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
611 static void write_rsa(unsigned char **out, RSA *rsa, int ispub)
614 nbyte = BN_num_bytes(rsa->n);
615 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
616 write_lebn(out, rsa->e, 4);
617 write_lebn(out, rsa->n, -1);
620 write_lebn(out, rsa->p, hnbyte);
621 write_lebn(out, rsa->q, hnbyte);
622 write_lebn(out, rsa->dmp1, hnbyte);
623 write_lebn(out, rsa->dmq1, hnbyte);
624 write_lebn(out, rsa->iqmp, hnbyte);
625 write_lebn(out, rsa->d, nbyte);
629 static void write_dsa(unsigned char **out, DSA *dsa, int ispub)
632 nbyte = BN_num_bytes(dsa->p);
633 write_lebn(out, dsa->p, nbyte);
634 write_lebn(out, dsa->q, 20);
635 write_lebn(out, dsa->g, nbyte);
637 write_lebn(out, dsa->pub_key, nbyte);
639 write_lebn(out, dsa->priv_key, 20);
640 /* Set "invalid" for seed structure values */
641 memset(*out, 0xff, 24);
647 int i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk)
649 return do_i2b_bio(out, pk, 0);
652 int i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk)
654 return do_i2b_bio(out, pk, 1);
657 #ifndef OPENSSL_NO_RC4
659 static int do_PVK_header(const unsigned char **in, unsigned int length,
661 unsigned int *psaltlen, unsigned int *pkeylen)
664 const unsigned char *p = *in;
665 unsigned int pvk_magic, is_encrypted;
670 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
679 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
683 pvk_magic = read_ledword(&p);
684 if (pvk_magic != MS_PVKMAGIC)
686 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER);
692 /*keytype = */read_ledword(&p);
693 is_encrypted = read_ledword(&p);
694 *psaltlen = read_ledword(&p);
695 *pkeylen = read_ledword(&p);
697 if (is_encrypted && !*psaltlen)
699 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER);
707 static int derive_pvk_key(unsigned char *key,
708 const unsigned char *salt, unsigned int saltlen,
709 const unsigned char *pass, int passlen)
713 EVP_MD_CTX_init(&mctx);
714 if (!EVP_DigestInit_ex(&mctx, EVP_sha1(), NULL)
715 || !EVP_DigestUpdate(&mctx, salt, saltlen)
716 || !EVP_DigestUpdate(&mctx, pass, passlen)
717 || !EVP_DigestFinal_ex(&mctx, key, NULL))
720 EVP_MD_CTX_cleanup(&mctx);
725 static EVP_PKEY *do_PVK_body(const unsigned char **in,
726 unsigned int saltlen, unsigned int keylen,
727 pem_password_cb *cb, void *u)
729 EVP_PKEY *ret = NULL;
730 const unsigned char *p = *in;
732 unsigned char *enctmp = NULL, *q;
734 EVP_CIPHER_CTX_init(&cctx);
737 char psbuf[PEM_BUFSIZE];
738 unsigned char keybuf[20];
739 int enctmplen, inlen;
741 inlen=cb(psbuf,PEM_BUFSIZE,0,u);
743 inlen=PEM_def_callback(psbuf,PEM_BUFSIZE,0,u);
746 PEMerr(PEM_F_DO_PVK_BODY,PEM_R_BAD_PASSWORD_READ);
749 enctmp = OPENSSL_malloc(keylen + 8);
752 PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
755 if (!derive_pvk_key(keybuf, p, saltlen,
756 (unsigned char *)psbuf, inlen))
759 /* Copy BLOBHEADER across, decrypt rest */
760 memcpy(enctmp, p, 8);
764 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
766 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
768 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen))
770 magic = read_ledword((const unsigned char **)&q);
771 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC)
774 memset(keybuf + 5, 0, 11);
775 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf,
778 OPENSSL_cleanse(keybuf, 20);
779 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
781 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen,
784 magic = read_ledword((const unsigned char **)&q);
785 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC)
787 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);
792 OPENSSL_cleanse(keybuf, 20);
796 ret = b2i_PrivateKey(&p, keylen);
798 EVP_CIPHER_CTX_cleanup(&cctx);
799 if (enctmp && saltlen)
800 OPENSSL_free(enctmp);
805 EVP_PKEY *b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u)
807 unsigned char pvk_hdr[24], *buf = NULL;
808 const unsigned char *p;
810 EVP_PKEY *ret = NULL;
811 unsigned int saltlen, keylen;
812 if (BIO_read(in, pvk_hdr, 24) != 24)
814 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
819 if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen))
821 buflen = (int) keylen + saltlen;
822 buf = OPENSSL_malloc(buflen);
825 PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE);
829 if (BIO_read(in, buf, buflen) != buflen)
831 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
834 ret = do_PVK_body(&p, saltlen, keylen, cb, u);
839 OPENSSL_cleanse(buf, buflen);
847 static int i2b_PVK(unsigned char **out, EVP_PKEY*pk, int enclevel,
848 pem_password_cb *cb, void *u)
850 int outlen = 24, pklen;
851 unsigned char *p, *salt = NULL;
853 EVP_CIPHER_CTX_init(&cctx);
855 outlen += PVK_SALTLEN;
856 pklen = do_i2b(NULL, pk, 0);
866 p = OPENSSL_malloc(outlen);
869 PEMerr(PEM_F_I2B_PVK,ERR_R_MALLOC_FAILURE);
875 write_ledword(&p, MS_PVKMAGIC);
876 write_ledword(&p, 0);
877 if (pk->type == EVP_PKEY_DSA)
878 write_ledword(&p, MS_KEYTYPE_SIGN);
880 write_ledword(&p, MS_KEYTYPE_KEYX);
881 write_ledword(&p, enclevel ? 1 : 0);
882 write_ledword(&p, enclevel ? PVK_SALTLEN: 0);
883 write_ledword(&p, pklen);
886 if (RAND_bytes(p, PVK_SALTLEN) <= 0)
896 char psbuf[PEM_BUFSIZE];
897 unsigned char keybuf[20];
898 int enctmplen, inlen;
900 inlen=cb(psbuf,PEM_BUFSIZE,1,u);
902 inlen=PEM_def_callback(psbuf,PEM_BUFSIZE,1,u);
905 PEMerr(PEM_F_I2B_PVK,PEM_R_BAD_PASSWORD_READ);
908 if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,
909 (unsigned char *)psbuf, inlen))
912 memset(keybuf + 5, 0, 11);
913 p = salt + PVK_SALTLEN + 8;
914 if (!EVP_EncryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
916 OPENSSL_cleanse(keybuf, 20);
917 if (!EVP_DecryptUpdate(&cctx, p, &enctmplen, p, pklen - 8))
919 if (!EVP_DecryptFinal_ex(&cctx, p + enctmplen, &enctmplen))
922 EVP_CIPHER_CTX_cleanup(&cctx);
926 EVP_CIPHER_CTX_cleanup(&cctx);
930 int i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel,
931 pem_password_cb *cb, void *u)
933 unsigned char *tmp = NULL;
935 outlen = i2b_PVK(&tmp, pk, enclevel, cb, u);
938 wrlen = BIO_write(out, tmp, outlen);
942 PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE);