--- /dev/null
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2005.
+ */
+/* ====================================================================
+ * Copyright (c) 2005 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+/* Support for PVK format keys and related structures (such a PUBLICKEYBLOB
+ * and PRIVATEKEYBLOB).
+ */
+
+#include "cryptlib.h"
+#include <openssl/pem.h>
+#include <openssl/rand.h>
+#include <openssl/bn.h>
+#if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)
+#include <openssl/dsa.h>
+#include <openssl/rsa.h>
+
+/* Utility function: read a DWORD (4 byte unsigned integer) in little endian
+ * format
+ */
+
+static unsigned int read_ledword(const unsigned char **in)
+ {
+ const unsigned char *p = *in;
+ unsigned int ret;
+ ret = *p++;
+ ret |= (*p++ << 8);
+ ret |= (*p++ << 16);
+ ret |= (*p++ << 24);
+ *in = p;
+ return ret;
+ }
+
+/* Read a BIGNUM in little endian format. The docs say that this should take up
+ * bitlen/8 bytes.
+ */
+
+static int read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r)
+ {
+ const unsigned char *p;
+ unsigned char *tmpbuf, *q;
+ unsigned int i;
+ p = *in + nbyte - 1;
+ tmpbuf = OPENSSL_malloc(nbyte);
+ if (!tmpbuf)
+ return 0;
+ q = tmpbuf;
+ for (i = 0; i < nbyte; i++)
+ *q++ = *p--;
+ *r = BN_bin2bn(tmpbuf, nbyte, NULL);
+ OPENSSL_free(tmpbuf);
+ if (*r)
+ {
+ *in += nbyte;
+ return 1;
+ }
+ else
+ return 0;
+ }
+
+
+/* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */
+
+#define MS_PUBLICKEYBLOB 0x6
+#define MS_PRIVATEKEYBLOB 0x7
+#define MS_RSA1MAGIC 0x31415352L
+#define MS_RSA2MAGIC 0x32415352L
+#define MS_DSS1MAGIC 0x31535344L
+#define MS_DSS2MAGIC 0x32535344L
+
+#define MS_KEYALG_RSA_KEYX 0xa400
+#define MS_KEYALG_DSS_SIGN 0x2200
+
+#define MS_KEYTYPE_KEYX 0x1
+#define MS_KEYTYPE_SIGN 0x2
+
+/* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */
+#define MS_PVKMAGIC 0xb0b5f11eL
+/* Salt length for PVK files */
+#define PVK_SALTLEN 0x10
+
+static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length,
+ unsigned int bitlen, int ispub);
+static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length,
+ unsigned int bitlen, int ispub);
+
+static int do_blob_header(const unsigned char **in, unsigned int length,
+ unsigned int *pmagic, unsigned int *pbitlen,
+ int *pisdss, int *pispub)
+ {
+ const unsigned char *p = *in;
+ if (length < 16)
+ return 0;
+ /* bType */
+ if (*p == MS_PUBLICKEYBLOB)
+ {
+ if (*pispub == 0)
+ {
+ PEMerr(PEM_F_DO_BLOB_HEADER,
+ PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
+ return 0;
+ }
+ *pispub = 1;
+ }
+ else if (*p == MS_PRIVATEKEYBLOB)
+ {
+ if (*pispub == 1)
+ {
+ PEMerr(PEM_F_DO_BLOB_HEADER,
+ PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
+ return 0;
+ }
+ *pispub = 0;
+ }
+ else
+ return 0;
+ p++;
+ /* Version */
+ if (*p++ != 0x2)
+ {
+ PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);
+ return 0;
+ }
+ /* Ignore reserved, aiKeyAlg */
+ p+= 6;
+ *pmagic = read_ledword(&p);
+ *pbitlen = read_ledword(&p);
+ *pisdss = 0;
+ switch (*pmagic)
+ {
+
+ case MS_DSS1MAGIC:
+ *pisdss = 1;
+ case MS_RSA1MAGIC:
+ if (*pispub == 0)
+ {
+ PEMerr(PEM_F_DO_BLOB_HEADER,
+ PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
+ return 0;
+ }
+ break;
+
+ case MS_DSS2MAGIC:
+ *pisdss = 1;
+ case MS_RSA2MAGIC:
+ if (*pispub == 1)
+ {
+ PEMerr(PEM_F_DO_BLOB_HEADER,
+ PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
+ return 0;
+ }
+ break;
+
+ default:
+ PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
+ return -1;
+ }
+ *in = p;
+ return 1;
+ }
+
+static unsigned int blob_length(unsigned bitlen, int isdss, int ispub)
+ {
+ unsigned int nbyte, hnbyte;
+ nbyte = (bitlen + 7) >> 3;
+ hnbyte = (bitlen + 15) >> 4;
+ if (isdss)
+ {
+
+ /* Expected length: 20 for q + 3 components bitlen each + 24
+ * for seed structure.
+ */
+ if (ispub)
+ return 44 + 3 * nbyte;
+ /* Expected length: 20 for q, priv, 2 bitlen components + 24
+ * for seed structure.
+ */
+ else
+ return 64 + 2 * nbyte;
+ }
+ else
+ {
+ /* Expected length: 4 for 'e' + 'n' */
+ if (ispub)
+ return 4 + nbyte;
+ else
+ /* Expected length: 4 for 'e' and 7 other components.
+ * 2 components are bitlen size, 5 are bitlen/2
+ */
+ return 4 + 2*nbyte + 5*hnbyte;
+ }
+
+ }
+
+static EVP_PKEY *do_b2i(const unsigned char **in, unsigned int length,
+ int ispub)
+ {
+ const unsigned char *p = *in;
+ unsigned int bitlen, magic;
+ int isdss;
+ if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0)
+ {
+ PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);
+ return NULL;
+ }
+ length -= 16;
+ if (length < blob_length(bitlen, isdss, ispub))
+ {
+ PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);
+ return NULL;
+ }
+ if (isdss)
+ return b2i_dss(&p, length, bitlen, ispub);
+ else
+ return b2i_rsa(&p, length, bitlen, ispub);
+ }
+
+static EVP_PKEY *do_b2i_bio(BIO *in, int ispub)
+ {
+ const unsigned char *p;
+ unsigned char hdr_buf[16], *buf = NULL;
+ unsigned int bitlen, magic, length;
+ int isdss;
+ EVP_PKEY *ret = NULL;
+ if (BIO_read(in, hdr_buf, 16) != 16)
+ {
+ PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
+ return NULL;
+ }
+ p = hdr_buf;
+ if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)
+ return NULL;
+
+ length = blob_length(bitlen, isdss, ispub);
+ buf = OPENSSL_malloc(length);
+ if (!buf)
+ {
+ PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ p = buf;
+ if (BIO_read(in, buf, length) != (int)length)
+ {
+ PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
+ goto err;
+ }
+
+ if (isdss)
+ ret = b2i_dss(&p, length, bitlen, ispub);
+ else
+ ret = b2i_rsa(&p, length, bitlen, ispub);
+
+ err:
+ if (buf)
+ OPENSSL_free(buf);
+ return ret;
+ }
+
+static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length,
+ unsigned int bitlen, int ispub)
+ {
+ const unsigned char *p = *in;
+ EVP_PKEY *ret = NULL;
+ DSA *dsa = NULL;
+ BN_CTX *ctx = NULL;
+ unsigned int nbyte;
+ nbyte = (bitlen + 7) >> 3;
+
+ dsa = DSA_new();
+ ret = EVP_PKEY_new();
+ if (!dsa || !ret)
+ goto memerr;
+ if (!read_lebn(&p, nbyte, &dsa->p))
+ goto memerr;
+ if (!read_lebn(&p, 20, &dsa->q))
+ goto memerr;
+ if (!read_lebn(&p, nbyte, &dsa->g))
+ goto memerr;
+ if (ispub)
+ {
+ if (!read_lebn(&p, nbyte, &dsa->pub_key))
+ goto memerr;
+ }
+ else
+ {
+ if (!read_lebn(&p, 20, &dsa->priv_key))
+ goto memerr;
+ /* Calculate public key */
+ if (!(dsa->pub_key = BN_new()))
+ goto memerr;
+ if (!(ctx = BN_CTX_new()))
+ goto memerr;
+
+ if (!BN_mod_exp(dsa->pub_key, dsa->g,
+ dsa->priv_key, dsa->p, ctx))
+
+ goto memerr;
+ BN_CTX_free(ctx);
+ }
+
+ EVP_PKEY_set1_DSA(ret, dsa);
+ DSA_free(dsa);
+ *in = p;
+ return ret;
+
+ memerr:
+ PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
+ if (dsa)
+ DSA_free(dsa);
+ if (ret)
+ EVP_PKEY_free(ret);
+ if (ctx)
+ BN_CTX_free(ctx);
+ return NULL;
+ }
+
+static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length,
+ unsigned int bitlen, int ispub)
+
+ {
+ const unsigned char *p = *in;
+ EVP_PKEY *ret = NULL;
+ RSA *rsa = NULL;
+ unsigned int nbyte, hnbyte;
+ nbyte = (bitlen + 7) >> 3;
+ hnbyte = (bitlen + 15) >> 4;
+ rsa = RSA_new();
+ ret = EVP_PKEY_new();
+ if (!rsa || !ret)
+ goto memerr;
+ rsa->e = BN_new();
+ if (!rsa->e)
+ goto memerr;
+ if (!BN_set_word(rsa->e, read_ledword(&p)))
+ goto memerr;
+ if (!read_lebn(&p, nbyte, &rsa->n))
+ goto memerr;
+ if (!ispub)
+ {
+ if (!read_lebn(&p, hnbyte, &rsa->p))
+ goto memerr;
+ if (!read_lebn(&p, hnbyte, &rsa->q))
+ goto memerr;
+ if (!read_lebn(&p, hnbyte, &rsa->dmp1))
+ goto memerr;
+ if (!read_lebn(&p, hnbyte, &rsa->dmq1))
+ goto memerr;
+ if (!read_lebn(&p, hnbyte, &rsa->iqmp))
+ goto memerr;
+ if (!read_lebn(&p, nbyte, &rsa->d))
+ goto memerr;
+ }
+
+ EVP_PKEY_set1_RSA(ret, rsa);
+ RSA_free(rsa);
+ *in = p;
+ return ret;
+ memerr:
+ PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
+ if (rsa)
+ RSA_free(rsa);
+ if (ret)
+ EVP_PKEY_free(ret);
+ return NULL;
+ }
+
+EVP_PKEY *b2i_PrivateKey(const unsigned char **in, long length)
+ {
+ return do_b2i(in, length, 0);
+ }
+
+EVP_PKEY *b2i_PublicKey(const unsigned char **in, long length)
+ {
+ return do_b2i(in, length, 1);
+ }
+
+
+EVP_PKEY *b2i_PrivateKey_bio(BIO *in)
+ {
+ return do_b2i_bio(in, 0);
+ }
+
+EVP_PKEY *b2i_PublicKey_bio(BIO *in)
+ {
+ return do_b2i_bio(in, 1);
+ }
+
+static void write_ledword(unsigned char **out, unsigned int dw)
+ {
+ unsigned char *p = *out;
+ *p++ = dw & 0xff;
+ *p++ = (dw>>8) & 0xff;
+ *p++ = (dw>>16) & 0xff;
+ *p++ = (dw>>24) & 0xff;
+ *out = p;
+ }
+
+static void write_lebn(unsigned char **out, const BIGNUM *bn, int len)
+ {
+ int nb, i;
+ unsigned char *p = *out, *q, c;
+ nb = BN_num_bytes(bn);
+ BN_bn2bin(bn, p);
+ q = p + nb - 1;
+ /* In place byte order reversal */
+ for (i = 0; i < nb/2; i++)
+ {
+ c = *p;
+ *p++ = *q;
+ *q-- = c;
+ }
+ *out += nb;
+ /* Pad with zeroes if we have to */
+ if (len > 0)
+ {
+ len -= nb;
+ if (len > 0)
+ {
+ memset(*out, 0, len);
+ *out += len;
+ }
+ }
+ }
+
+
+static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic);
+static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic);
+
+static void write_rsa(unsigned char **out, RSA *rsa, int ispub);
+static void write_dsa(unsigned char **out, DSA *dsa, int ispub);
+
+static int do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub)
+ {
+ unsigned char *p;
+ unsigned int bitlen, magic = 0, keyalg;
+ int outlen, noinc = 0;
+ if (pk->type == EVP_PKEY_DSA)
+ {
+ bitlen = check_bitlen_dsa(pk->pkey.dsa, ispub, &magic);
+ keyalg = MS_KEYALG_DSS_SIGN;
+ }
+ else if (pk->type == EVP_PKEY_RSA)
+ {
+ bitlen = check_bitlen_rsa(pk->pkey.rsa, ispub, &magic);
+ keyalg = MS_KEYALG_RSA_KEYX;
+ }
+ else
+ return -1;
+ if (bitlen == 0)
+ return -1;
+ outlen = 16 + blob_length(bitlen,
+ keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);
+ if (out == NULL)
+ return outlen;
+ if (*out)
+ p = *out;
+ else
+ {
+ p = OPENSSL_malloc(outlen);
+ if (!p)
+ return -1;
+ *out = p;
+ noinc = 1;
+ }
+ if (ispub)
+ *p++ = MS_PUBLICKEYBLOB;
+ else
+ *p++ = MS_PRIVATEKEYBLOB;
+ *p++ = 0x2;
+ *p++ = 0;
+ *p++ = 0;
+ write_ledword(&p, keyalg);
+ write_ledword(&p, magic);
+ write_ledword(&p, bitlen);
+ if (keyalg == MS_KEYALG_DSS_SIGN)
+ write_dsa(&p, pk->pkey.dsa, ispub);
+ else
+ write_rsa(&p, pk->pkey.rsa, ispub);
+ if (!noinc)
+ *out += outlen;
+ return outlen;
+ }
+
+static int do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub)
+ {
+ unsigned char *tmp = NULL;
+ int outlen, wrlen;
+ outlen = do_i2b(&tmp, pk, ispub);
+ if (outlen < 0)
+ return -1;
+ wrlen = BIO_write(out, tmp, outlen);
+ OPENSSL_free(tmp);
+ if (wrlen == outlen)
+ return outlen;
+ return -1;
+ }
+
+static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic)
+ {
+ int bitlen;
+ bitlen = BN_num_bits(dsa->p);
+ if ((bitlen & 7) || (BN_num_bits(dsa->q) != 160)
+ || (BN_num_bits(dsa->g) > bitlen))
+ goto badkey;
+ if (ispub)
+ {
+ if (BN_num_bits(dsa->pub_key) > bitlen)
+ goto badkey;
+ *pmagic = MS_DSS1MAGIC;
+ }
+ else
+ {
+ if (BN_num_bits(dsa->priv_key) > 160)
+ goto badkey;
+ *pmagic = MS_DSS2MAGIC;
+ }
+
+ return bitlen;
+ badkey:
+ PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
+ return 0;
+ }
+
+static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic)
+ {
+ int nbyte, hnbyte, bitlen;
+ if (BN_num_bits(rsa->e) > 32)
+ goto badkey;
+ bitlen = BN_num_bits(rsa->n);
+ nbyte = BN_num_bytes(rsa->n);
+ hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
+ if (ispub)
+ {
+ *pmagic = MS_RSA1MAGIC;
+ return bitlen;
+ }
+ else
+ {
+ *pmagic = MS_RSA2MAGIC;
+ /* For private key each component must fit within nbyte or
+ * hnbyte.
+ */
+ if (BN_num_bytes(rsa->d) > nbyte)
+ goto badkey;
+ if ((BN_num_bytes(rsa->iqmp) > hnbyte)
+ || (BN_num_bytes(rsa->p) > hnbyte)
+ || (BN_num_bytes(rsa->q) > hnbyte)
+ || (BN_num_bytes(rsa->dmp1) > hnbyte)
+ || (BN_num_bytes(rsa->dmq1) > hnbyte))
+ goto badkey;
+ }
+ return bitlen;
+ badkey:
+ PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
+ return 0;
+ }
+
+
+static void write_rsa(unsigned char **out, RSA *rsa, int ispub)
+ {
+ int nbyte, hnbyte;
+ nbyte = BN_num_bytes(rsa->n);
+ hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
+ write_lebn(out, rsa->e, 4);
+ write_lebn(out, rsa->n, -1);
+ if (ispub)
+ return;
+ write_lebn(out, rsa->p, hnbyte);
+ write_lebn(out, rsa->q, hnbyte);
+ write_lebn(out, rsa->dmp1, hnbyte);
+ write_lebn(out, rsa->dmq1, hnbyte);
+ write_lebn(out, rsa->iqmp, hnbyte);
+ write_lebn(out, rsa->d, nbyte);
+ }
+
+
+static void write_dsa(unsigned char **out, DSA *dsa, int ispub)
+ {
+ int nbyte;
+ nbyte = BN_num_bytes(dsa->p);
+ write_lebn(out, dsa->p, nbyte);
+ write_lebn(out, dsa->q, 20);
+ write_lebn(out, dsa->g, nbyte);
+ if (ispub)
+ write_lebn(out, dsa->pub_key, nbyte);
+ else
+ write_lebn(out, dsa->priv_key, 20);
+ /* Set "invalid" for seed structure values */
+ memset(*out, 0xff, 24);
+ *out += 24;
+ return;
+ }
+
+
+int i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk)
+ {
+ return do_i2b_bio(out, pk, 0);
+ }
+
+int i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk)
+ {
+ return do_i2b_bio(out, pk, 1);
+ }
+
+#ifndef OPENSSL_NO_RC4
+
+static int do_PVK_header(const unsigned char **in, unsigned int length,
+ int skip_magic,
+ unsigned int *psaltlen, unsigned int *pkeylen)
+
+ {
+ const unsigned char *p = *in;
+ unsigned int pvk_magic, is_encrypted;
+ if (skip_magic)
+ {
+ if (length < 20)
+ {
+ PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
+ return 0;
+ }
+ length -= 20;
+ }
+ else
+ {
+ if (length < 24)
+ {
+ PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
+ return 0;
+ }
+ length -= 24;
+ pvk_magic = read_ledword(&p);
+ if (pvk_magic != MS_PVKMAGIC)
+ {
+ PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER);
+ return 0;
+ }
+ }
+ /* Skip reserved */
+ p += 4;
+ /*keytype = */read_ledword(&p);
+ is_encrypted = read_ledword(&p);
+ *psaltlen = read_ledword(&p);
+ *pkeylen = read_ledword(&p);
+
+ if (is_encrypted && !*psaltlen)
+ {
+ PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER);
+ return 0;
+ }
+
+ *in = p;
+ return 1;
+ }
+
+static int derive_pvk_key(unsigned char *key,
+ const unsigned char *salt, unsigned int saltlen,
+ const unsigned char *pass, int passlen)
+ {
+ EVP_MD_CTX mctx;
+ int rv = 1;
+ EVP_MD_CTX_init(&mctx);
+ if (!EVP_DigestInit_ex(&mctx, EVP_sha1(), NULL)
+ || !EVP_DigestUpdate(&mctx, salt, saltlen)
+ || !EVP_DigestUpdate(&mctx, pass, passlen)
+ || !EVP_DigestFinal_ex(&mctx, key, NULL))
+ rv = 0;
+
+ EVP_MD_CTX_cleanup(&mctx);
+ return rv;
+ }
+
+
+static EVP_PKEY *do_PVK_body(const unsigned char **in,
+ unsigned int saltlen, unsigned int keylen,
+ pem_password_cb *cb, void *u)
+ {
+ EVP_PKEY *ret = NULL;
+ const unsigned char *p = *in;
+ unsigned int magic;
+ unsigned char *enctmp = NULL, *q;
+ EVP_CIPHER_CTX cctx;
+ EVP_CIPHER_CTX_init(&cctx);
+ if (saltlen)
+ {
+ char psbuf[PEM_BUFSIZE];
+ unsigned char keybuf[20];
+ int enctmplen, inlen;
+ if (cb)
+ inlen=cb(psbuf,PEM_BUFSIZE,0,u);
+ else
+ inlen=PEM_def_callback(psbuf,PEM_BUFSIZE,0,u);
+ if (inlen <= 0)
+ {
+ PEMerr(PEM_F_DO_PVK_BODY,PEM_R_BAD_PASSWORD_READ);
+ return NULL;
+ }
+ enctmp = OPENSSL_malloc(keylen + 8);
+ if (!enctmp)
+ {
+ PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+ if (!derive_pvk_key(keybuf, p, saltlen,
+ (unsigned char *)psbuf, inlen))
+ return NULL;
+ p += saltlen;
+ /* Copy BLOBHEADER across, decrypt rest */
+ memcpy(enctmp, p, 8);
+ p += 8;
+ if (keylen < 8)
+ {
+ PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT);
+ return NULL;
+ }
+ inlen = keylen - 8;
+ q = enctmp + 8;
+ if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
+ goto err;
+ if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
+ goto err;
+ if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen))
+ goto err;
+ magic = read_ledword((const unsigned char **)&q);
+ if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC)
+ {
+ q = enctmp + 8;
+ memset(keybuf + 5, 0, 11);
+ if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf,
+ NULL))
+ goto err;
+ OPENSSL_cleanse(keybuf, 20);
+ if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
+ goto err;
+ if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen,
+ &enctmplen))
+ goto err;
+ magic = read_ledword((const unsigned char **)&q);
+ if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC)
+ {
+ PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);
+ goto err;
+ }
+ }
+ else
+ OPENSSL_cleanse(keybuf, 20);
+ p = enctmp;
+ }
+
+ ret = b2i_PrivateKey(&p, keylen);
+ err:
+ EVP_CIPHER_CTX_cleanup(&cctx);
+ if (enctmp && saltlen)
+ OPENSSL_free(enctmp);
+ return ret;
+ }
+
+
+EVP_PKEY *b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u)
+ {
+ unsigned char pvk_hdr[24], *buf = NULL;
+ const unsigned char *p;
+ int buflen;
+ EVP_PKEY *ret = NULL;
+ unsigned int saltlen, keylen;
+ if (BIO_read(in, pvk_hdr, 24) != 24)
+ {
+ PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
+ return NULL;
+ }
+ p = pvk_hdr;
+
+ if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen))
+ return 0;
+ buflen = (int) keylen + saltlen;
+ buf = OPENSSL_malloc(buflen);
+ if (!buf)
+ {
+ PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ p = buf;
+ if (BIO_read(in, buf, buflen) != buflen)
+ {
+ PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
+ goto err;
+ }
+ ret = do_PVK_body(&p, saltlen, keylen, cb, u);
+
+ err:
+ if (buf)
+ {
+ OPENSSL_cleanse(buf, buflen);
+ OPENSSL_free(buf);
+ }
+ return ret;
+ }
+
+
+
+static int i2b_PVK(unsigned char **out, EVP_PKEY*pk, int enclevel,
+ pem_password_cb *cb, void *u)
+ {
+ int outlen = 24, pklen;
+ unsigned char *p, *salt = NULL;
+ EVP_CIPHER_CTX cctx;
+ EVP_CIPHER_CTX_init(&cctx);
+ if (enclevel)
+ outlen += PVK_SALTLEN;
+ pklen = do_i2b(NULL, pk, 0);
+ if (pklen < 0)
+ return -1;
+ outlen += pklen;
+ if (!out)
+ return outlen;
+ if (*out)
+ p = *out;
+ else
+ {
+ p = OPENSSL_malloc(outlen);
+ if (!p)
+ {
+ PEMerr(PEM_F_I2B_PVK,ERR_R_MALLOC_FAILURE);
+ return -1;
+ }
+ *out = p;
+ }
+
+ write_ledword(&p, MS_PVKMAGIC);
+ write_ledword(&p, 0);
+ if (pk->type == EVP_PKEY_DSA)
+ write_ledword(&p, MS_KEYTYPE_SIGN);
+ else
+ write_ledword(&p, MS_KEYTYPE_KEYX);
+ write_ledword(&p, enclevel ? 1 : 0);
+ write_ledword(&p, enclevel ? PVK_SALTLEN: 0);
+ write_ledword(&p, pklen);
+ if (enclevel)
+ {
+ if (RAND_bytes(p, PVK_SALTLEN) <= 0)
+ goto error;
+ salt = p;
+ p += PVK_SALTLEN;
+ }
+ do_i2b(&p, pk, 0);
+ if (enclevel == 0)
+ return outlen;
+ else
+ {
+ char psbuf[PEM_BUFSIZE];
+ unsigned char keybuf[20];
+ int enctmplen, inlen;
+ if (cb)
+ inlen=cb(psbuf,PEM_BUFSIZE,1,u);
+ else
+ inlen=PEM_def_callback(psbuf,PEM_BUFSIZE,1,u);
+ if (inlen <= 0)
+ {
+ PEMerr(PEM_F_I2B_PVK,PEM_R_BAD_PASSWORD_READ);
+ goto error;
+ }
+ if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,
+ (unsigned char *)psbuf, inlen))
+ goto error;
+ if (enclevel == 1)
+ memset(keybuf + 5, 0, 11);
+ p = salt + PVK_SALTLEN + 8;
+ if (!EVP_EncryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
+ goto error;
+ OPENSSL_cleanse(keybuf, 20);
+ if (!EVP_DecryptUpdate(&cctx, p, &enctmplen, p, pklen - 8))
+ goto error;
+ if (!EVP_DecryptFinal_ex(&cctx, p + enctmplen, &enctmplen))
+ goto error;
+ }
+ EVP_CIPHER_CTX_cleanup(&cctx);
+ return outlen;
+
+ error:
+ EVP_CIPHER_CTX_cleanup(&cctx);
+ return -1;
+ }
+
+int i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel,
+ pem_password_cb *cb, void *u)
+ {
+ unsigned char *tmp = NULL;
+ int outlen, wrlen;
+ outlen = i2b_PVK(&tmp, pk, enclevel, cb, u);
+ if (outlen < 0)
+ return -1;
+ wrlen = BIO_write(out, tmp, outlen);
+ OPENSSL_free(tmp);
+ if (wrlen == outlen)
+ {
+ PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE);
+ return outlen;
+ }
+ return -1;
+ }
+
+#endif
+
+#endif
projects / cassiopeia.git / blobdiff