mirror of
https://github.com/openssl/openssl.git
synced 2024-12-03 05:41:46 +08:00
f41ac0eeab
Use of the low level DSA functions has been informally discouraged for a long time. We now formally deprecate them. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/10977)
894 lines
24 KiB
C
894 lines
24 KiB
C
/*
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* Copyright 2005-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* Support for PVK format keys and related structures (such a PUBLICKEYBLOB
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* and PRIVATEKEYBLOB).
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*/
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/*
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* DSA low level APIs are deprecated for public use, but still ok for
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* internal use.
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*/
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#include "internal/deprecated.h"
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#include "internal/cryptlib.h"
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#include <openssl/pem.h>
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#include <openssl/rand.h>
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#include <openssl/bn.h>
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#if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)
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# include <openssl/dsa.h>
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# include <openssl/rsa.h>
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/*
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* Utility function: read a DWORD (4 byte unsigned integer) in little endian
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* format
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*/
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static unsigned int read_ledword(const unsigned char **in)
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{
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const unsigned char *p = *in;
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unsigned int ret;
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ret = *p++;
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ret |= (*p++ << 8);
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ret |= (*p++ << 16);
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ret |= (*p++ << 24);
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*in = p;
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return ret;
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}
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/*
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* Read a BIGNUM in little endian format. The docs say that this should take
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* up bitlen/8 bytes.
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*/
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static int read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r)
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{
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*r = BN_lebin2bn(*in, nbyte, NULL);
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if (*r == NULL)
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return 0;
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*in += nbyte;
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return 1;
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}
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/* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */
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# define MS_PUBLICKEYBLOB 0x6
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# define MS_PRIVATEKEYBLOB 0x7
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# define MS_RSA1MAGIC 0x31415352L
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# define MS_RSA2MAGIC 0x32415352L
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# define MS_DSS1MAGIC 0x31535344L
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# define MS_DSS2MAGIC 0x32535344L
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# define MS_KEYALG_RSA_KEYX 0xa400
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# define MS_KEYALG_DSS_SIGN 0x2200
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# define MS_KEYTYPE_KEYX 0x1
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# define MS_KEYTYPE_SIGN 0x2
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/* Maximum length of a blob after header */
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# define BLOB_MAX_LENGTH 102400
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/* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */
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# define MS_PVKMAGIC 0xb0b5f11eL
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/* Salt length for PVK files */
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# define PVK_SALTLEN 0x10
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/* Maximum length in PVK header */
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# define PVK_MAX_KEYLEN 102400
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/* Maximum salt length */
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# define PVK_MAX_SALTLEN 10240
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static EVP_PKEY *b2i_rsa(const unsigned char **in,
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unsigned int bitlen, int ispub);
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static EVP_PKEY *b2i_dss(const unsigned char **in,
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unsigned int bitlen, int ispub);
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static int do_blob_header(const unsigned char **in, unsigned int length,
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unsigned int *pmagic, unsigned int *pbitlen,
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int *pisdss, int *pispub)
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{
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const unsigned char *p = *in;
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if (length < 16)
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return 0;
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/* bType */
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if (*p == MS_PUBLICKEYBLOB) {
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if (*pispub == 0) {
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PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
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return 0;
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}
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*pispub = 1;
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} else if (*p == MS_PRIVATEKEYBLOB) {
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if (*pispub == 1) {
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PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
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return 0;
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}
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*pispub = 0;
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} else
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return 0;
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p++;
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/* Version */
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if (*p++ != 0x2) {
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PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);
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return 0;
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}
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/* Ignore reserved, aiKeyAlg */
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p += 6;
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*pmagic = read_ledword(&p);
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*pbitlen = read_ledword(&p);
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*pisdss = 0;
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switch (*pmagic) {
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case MS_DSS1MAGIC:
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*pisdss = 1;
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/* fall thru */
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case MS_RSA1MAGIC:
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if (*pispub == 0) {
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PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
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return 0;
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}
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break;
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case MS_DSS2MAGIC:
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*pisdss = 1;
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/* fall thru */
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case MS_RSA2MAGIC:
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if (*pispub == 1) {
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PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
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return 0;
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}
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break;
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default:
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PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
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return -1;
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}
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*in = p;
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return 1;
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}
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static unsigned int blob_length(unsigned bitlen, int isdss, int ispub)
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{
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unsigned int nbyte, hnbyte;
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nbyte = (bitlen + 7) >> 3;
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hnbyte = (bitlen + 15) >> 4;
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if (isdss) {
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/*
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* Expected length: 20 for q + 3 components bitlen each + 24 for seed
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* structure.
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*/
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if (ispub)
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return 44 + 3 * nbyte;
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/*
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* Expected length: 20 for q, priv, 2 bitlen components + 24 for seed
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* structure.
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*/
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else
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return 64 + 2 * nbyte;
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} else {
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/* Expected length: 4 for 'e' + 'n' */
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if (ispub)
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return 4 + nbyte;
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else
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/*
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* Expected length: 4 for 'e' and 7 other components. 2
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* components are bitlen size, 5 are bitlen/2
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*/
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return 4 + 2 * nbyte + 5 * hnbyte;
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}
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}
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static EVP_PKEY *do_b2i(const unsigned char **in, unsigned int length,
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int ispub)
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{
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const unsigned char *p = *in;
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unsigned int bitlen, magic;
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int isdss;
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if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0) {
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PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);
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return NULL;
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}
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length -= 16;
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if (length < blob_length(bitlen, isdss, ispub)) {
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PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);
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return NULL;
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}
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if (isdss)
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return b2i_dss(&p, bitlen, ispub);
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else
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return b2i_rsa(&p, bitlen, ispub);
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}
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static EVP_PKEY *do_b2i_bio(BIO *in, int ispub)
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{
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const unsigned char *p;
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unsigned char hdr_buf[16], *buf = NULL;
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unsigned int bitlen, magic, length;
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int isdss;
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EVP_PKEY *ret = NULL;
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if (BIO_read(in, hdr_buf, 16) != 16) {
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PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
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return NULL;
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}
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p = hdr_buf;
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if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)
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return NULL;
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length = blob_length(bitlen, isdss, ispub);
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if (length > BLOB_MAX_LENGTH) {
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PEMerr(PEM_F_DO_B2I_BIO, PEM_R_HEADER_TOO_LONG);
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return NULL;
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}
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buf = OPENSSL_malloc(length);
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if (buf == NULL) {
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PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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p = buf;
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if (BIO_read(in, buf, length) != (int)length) {
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PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
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goto err;
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}
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if (isdss)
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ret = b2i_dss(&p, bitlen, ispub);
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else
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ret = b2i_rsa(&p, bitlen, ispub);
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err:
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OPENSSL_free(buf);
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return ret;
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}
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static EVP_PKEY *b2i_dss(const unsigned char **in,
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unsigned int bitlen, int ispub)
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{
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const unsigned char *p = *in;
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EVP_PKEY *ret = NULL;
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DSA *dsa = NULL;
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BN_CTX *ctx = NULL;
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unsigned int nbyte;
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BIGNUM *pbn = NULL, *qbn = NULL, *gbn = NULL, *priv_key = NULL;
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BIGNUM *pub_key = NULL;
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nbyte = (bitlen + 7) >> 3;
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dsa = DSA_new();
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ret = EVP_PKEY_new();
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if (dsa == NULL || ret == NULL)
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goto memerr;
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if (!read_lebn(&p, nbyte, &pbn))
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goto memerr;
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if (!read_lebn(&p, 20, &qbn))
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goto memerr;
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if (!read_lebn(&p, nbyte, &gbn))
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goto memerr;
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if (ispub) {
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if (!read_lebn(&p, nbyte, &pub_key))
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goto memerr;
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} else {
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if (!read_lebn(&p, 20, &priv_key))
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goto memerr;
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/* Set constant time flag before public key calculation */
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BN_set_flags(priv_key, BN_FLG_CONSTTIME);
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/* Calculate public key */
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pub_key = BN_new();
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if (pub_key == NULL)
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goto memerr;
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if ((ctx = BN_CTX_new()) == NULL)
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goto memerr;
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if (!BN_mod_exp(pub_key, gbn, priv_key, pbn, ctx))
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goto memerr;
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BN_CTX_free(ctx);
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ctx = NULL;
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}
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if (!DSA_set0_pqg(dsa, pbn, qbn, gbn))
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goto memerr;
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pbn = qbn = gbn = NULL;
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if (!DSA_set0_key(dsa, pub_key, priv_key))
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goto memerr;
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pub_key = priv_key = NULL;
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if (!EVP_PKEY_set1_DSA(ret, dsa))
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goto memerr;
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DSA_free(dsa);
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*in = p;
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return ret;
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memerr:
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PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
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DSA_free(dsa);
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BN_free(pbn);
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BN_free(qbn);
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BN_free(gbn);
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BN_free(pub_key);
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BN_free(priv_key);
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EVP_PKEY_free(ret);
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BN_CTX_free(ctx);
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return NULL;
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}
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static EVP_PKEY *b2i_rsa(const unsigned char **in,
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unsigned int bitlen, int ispub)
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{
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const unsigned char *pin = *in;
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EVP_PKEY *ret = NULL;
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BIGNUM *e = NULL, *n = NULL, *d = NULL;
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BIGNUM *p = NULL, *q = NULL, *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL;
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RSA *rsa = NULL;
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unsigned int nbyte, hnbyte;
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nbyte = (bitlen + 7) >> 3;
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hnbyte = (bitlen + 15) >> 4;
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rsa = RSA_new();
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ret = EVP_PKEY_new();
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if (rsa == NULL || ret == NULL)
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goto memerr;
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e = BN_new();
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if (e == NULL)
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goto memerr;
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if (!BN_set_word(e, read_ledword(&pin)))
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goto memerr;
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if (!read_lebn(&pin, nbyte, &n))
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goto memerr;
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if (!ispub) {
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if (!read_lebn(&pin, hnbyte, &p))
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goto memerr;
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if (!read_lebn(&pin, hnbyte, &q))
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goto memerr;
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if (!read_lebn(&pin, hnbyte, &dmp1))
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goto memerr;
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if (!read_lebn(&pin, hnbyte, &dmq1))
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goto memerr;
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if (!read_lebn(&pin, hnbyte, &iqmp))
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goto memerr;
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if (!read_lebn(&pin, nbyte, &d))
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goto memerr;
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if (!RSA_set0_factors(rsa, p, q))
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goto memerr;
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p = q = NULL;
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if (!RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp))
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goto memerr;
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dmp1 = dmq1 = iqmp = NULL;
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}
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if (!RSA_set0_key(rsa, n, e, d))
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goto memerr;
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n = e = d = NULL;
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if (!EVP_PKEY_set1_RSA(ret, rsa))
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goto memerr;
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RSA_free(rsa);
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*in = pin;
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return ret;
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memerr:
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PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
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BN_free(e);
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BN_free(n);
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BN_free(p);
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BN_free(q);
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BN_free(dmp1);
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BN_free(dmq1);
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BN_free(iqmp);
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BN_free(d);
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RSA_free(rsa);
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EVP_PKEY_free(ret);
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return NULL;
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}
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EVP_PKEY *b2i_PrivateKey(const unsigned char **in, long length)
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{
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return do_b2i(in, length, 0);
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}
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EVP_PKEY *b2i_PublicKey(const unsigned char **in, long length)
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{
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return do_b2i(in, length, 1);
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}
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EVP_PKEY *b2i_PrivateKey_bio(BIO *in)
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{
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return do_b2i_bio(in, 0);
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}
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EVP_PKEY *b2i_PublicKey_bio(BIO *in)
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{
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return do_b2i_bio(in, 1);
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}
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static void write_ledword(unsigned char **out, unsigned int dw)
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{
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unsigned char *p = *out;
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*p++ = dw & 0xff;
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*p++ = (dw >> 8) & 0xff;
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*p++ = (dw >> 16) & 0xff;
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*p++ = (dw >> 24) & 0xff;
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*out = p;
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}
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static void write_lebn(unsigned char **out, const BIGNUM *bn, int len)
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{
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BN_bn2lebinpad(bn, *out, len);
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*out += len;
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}
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static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic);
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static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic);
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static void write_rsa(unsigned char **out, RSA *rsa, int ispub);
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static void write_dsa(unsigned char **out, DSA *dsa, int ispub);
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static int do_i2b(unsigned char **out, const EVP_PKEY *pk, int ispub)
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{
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unsigned char *p;
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unsigned int bitlen, magic = 0, keyalg;
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int outlen, noinc = 0;
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int pktype = EVP_PKEY_id(pk);
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if (pktype == EVP_PKEY_DSA) {
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bitlen = check_bitlen_dsa(EVP_PKEY_get0_DSA(pk), ispub, &magic);
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keyalg = MS_KEYALG_DSS_SIGN;
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} else if (pktype == EVP_PKEY_RSA) {
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bitlen = check_bitlen_rsa(EVP_PKEY_get0_RSA(pk), ispub, &magic);
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keyalg = MS_KEYALG_RSA_KEYX;
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} else
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return -1;
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if (bitlen == 0)
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return -1;
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outlen = 16 + blob_length(bitlen,
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keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);
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if (out == NULL)
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return outlen;
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if (*out)
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p = *out;
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else {
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if ((p = OPENSSL_malloc(outlen)) == NULL) {
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PEMerr(PEM_F_DO_I2B, ERR_R_MALLOC_FAILURE);
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return -1;
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}
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*out = p;
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noinc = 1;
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}
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if (ispub)
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*p++ = MS_PUBLICKEYBLOB;
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else
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*p++ = MS_PRIVATEKEYBLOB;
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*p++ = 0x2;
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*p++ = 0;
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*p++ = 0;
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write_ledword(&p, keyalg);
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write_ledword(&p, magic);
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write_ledword(&p, bitlen);
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if (keyalg == MS_KEYALG_DSS_SIGN)
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write_dsa(&p, EVP_PKEY_get0_DSA(pk), ispub);
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else
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write_rsa(&p, EVP_PKEY_get0_RSA(pk), ispub);
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if (!noinc)
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*out += outlen;
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return outlen;
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}
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static int do_i2b_bio(BIO *out, const EVP_PKEY *pk, int ispub)
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{
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unsigned char *tmp = NULL;
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int outlen, wrlen;
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outlen = do_i2b(&tmp, pk, ispub);
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if (outlen < 0)
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return -1;
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wrlen = BIO_write(out, tmp, outlen);
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OPENSSL_free(tmp);
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if (wrlen == outlen)
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return outlen;
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return -1;
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}
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static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic)
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{
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int bitlen;
|
|
const BIGNUM *p = NULL, *q = NULL, *g = NULL;
|
|
const BIGNUM *pub_key = NULL, *priv_key = NULL;
|
|
|
|
DSA_get0_pqg(dsa, &p, &q, &g);
|
|
DSA_get0_key(dsa, &pub_key, &priv_key);
|
|
bitlen = BN_num_bits(p);
|
|
if ((bitlen & 7) || (BN_num_bits(q) != 160)
|
|
|| (BN_num_bits(g) > bitlen))
|
|
goto badkey;
|
|
if (ispub) {
|
|
if (BN_num_bits(pub_key) > bitlen)
|
|
goto badkey;
|
|
*pmagic = MS_DSS1MAGIC;
|
|
} else {
|
|
if (BN_num_bits(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;
|
|
const BIGNUM *e;
|
|
|
|
RSA_get0_key(rsa, NULL, &e, NULL);
|
|
if (BN_num_bits(e) > 32)
|
|
goto badkey;
|
|
bitlen = RSA_bits(rsa);
|
|
nbyte = RSA_size(rsa);
|
|
hnbyte = (bitlen + 15) >> 4;
|
|
if (ispub) {
|
|
*pmagic = MS_RSA1MAGIC;
|
|
return bitlen;
|
|
} else {
|
|
const BIGNUM *d, *p, *q, *iqmp, *dmp1, *dmq1;
|
|
|
|
*pmagic = MS_RSA2MAGIC;
|
|
|
|
/*
|
|
* For private key each component must fit within nbyte or hnbyte.
|
|
*/
|
|
RSA_get0_key(rsa, NULL, NULL, &d);
|
|
if (BN_num_bytes(d) > nbyte)
|
|
goto badkey;
|
|
RSA_get0_factors(rsa, &p, &q);
|
|
RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp);
|
|
if ((BN_num_bytes(iqmp) > hnbyte)
|
|
|| (BN_num_bytes(p) > hnbyte)
|
|
|| (BN_num_bytes(q) > hnbyte)
|
|
|| (BN_num_bytes(dmp1) > hnbyte)
|
|
|| (BN_num_bytes(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;
|
|
const BIGNUM *n, *d, *e, *p, *q, *iqmp, *dmp1, *dmq1;
|
|
|
|
nbyte = RSA_size(rsa);
|
|
hnbyte = (RSA_bits(rsa) + 15) >> 4;
|
|
RSA_get0_key(rsa, &n, &e, &d);
|
|
write_lebn(out, e, 4);
|
|
write_lebn(out, n, nbyte);
|
|
if (ispub)
|
|
return;
|
|
RSA_get0_factors(rsa, &p, &q);
|
|
RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp);
|
|
write_lebn(out, p, hnbyte);
|
|
write_lebn(out, q, hnbyte);
|
|
write_lebn(out, dmp1, hnbyte);
|
|
write_lebn(out, dmq1, hnbyte);
|
|
write_lebn(out, iqmp, hnbyte);
|
|
write_lebn(out, d, nbyte);
|
|
}
|
|
|
|
static void write_dsa(unsigned char **out, DSA *dsa, int ispub)
|
|
{
|
|
int nbyte;
|
|
const BIGNUM *p = NULL, *q = NULL, *g = NULL;
|
|
const BIGNUM *pub_key = NULL, *priv_key = NULL;
|
|
|
|
DSA_get0_pqg(dsa, &p, &q, &g);
|
|
DSA_get0_key(dsa, &pub_key, &priv_key);
|
|
nbyte = BN_num_bytes(p);
|
|
write_lebn(out, p, nbyte);
|
|
write_lebn(out, q, 20);
|
|
write_lebn(out, g, nbyte);
|
|
if (ispub)
|
|
write_lebn(out, pub_key, nbyte);
|
|
else
|
|
write_lebn(out, priv_key, 20);
|
|
/* Set "invalid" for seed structure values */
|
|
memset(*out, 0xff, 24);
|
|
*out += 24;
|
|
return;
|
|
}
|
|
|
|
int i2b_PrivateKey_bio(BIO *out, const EVP_PKEY *pk)
|
|
{
|
|
return do_i2b_bio(out, pk, 0);
|
|
}
|
|
|
|
int i2b_PublicKey_bio(BIO *out, const 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;
|
|
}
|
|
} else {
|
|
if (length < 24) {
|
|
PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
|
|
return 0;
|
|
}
|
|
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 (*pkeylen > PVK_MAX_KEYLEN || *psaltlen > PVK_MAX_SALTLEN)
|
|
return 0;
|
|
|
|
if (is_encrypted && *psaltlen == 0) {
|
|
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 = EVP_MD_CTX_new();
|
|
int rv = 1;
|
|
if (mctx == NULL
|
|
|| !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_free(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;
|
|
unsigned char keybuf[20];
|
|
|
|
EVP_CIPHER_CTX *cctx = EVP_CIPHER_CTX_new();
|
|
if (saltlen) {
|
|
char psbuf[PEM_BUFSIZE];
|
|
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);
|
|
goto err;
|
|
}
|
|
enctmp = OPENSSL_malloc(keylen + 8);
|
|
if (enctmp == NULL) {
|
|
PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (!derive_pvk_key(keybuf, p, saltlen,
|
|
(unsigned char *)psbuf, inlen))
|
|
goto err;
|
|
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);
|
|
goto err;
|
|
}
|
|
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;
|
|
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;
|
|
}
|
|
}
|
|
p = enctmp;
|
|
}
|
|
|
|
ret = b2i_PrivateKey(&p, keylen);
|
|
err:
|
|
EVP_CIPHER_CTX_free(cctx);
|
|
if (enctmp != NULL) {
|
|
OPENSSL_cleanse(keybuf, sizeof(keybuf));
|
|
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 == NULL) {
|
|
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:
|
|
OPENSSL_clear_free(buf, buflen);
|
|
return ret;
|
|
}
|
|
|
|
static int i2b_PVK(unsigned char **out, const EVP_PKEY *pk, int enclevel,
|
|
pem_password_cb *cb, void *u)
|
|
{
|
|
int outlen = 24, pklen;
|
|
unsigned char *p = NULL, *start = NULL, *salt = NULL;
|
|
EVP_CIPHER_CTX *cctx = NULL;
|
|
if (enclevel)
|
|
outlen += PVK_SALTLEN;
|
|
pklen = do_i2b(NULL, pk, 0);
|
|
if (pklen < 0)
|
|
return -1;
|
|
outlen += pklen;
|
|
if (out == NULL)
|
|
return outlen;
|
|
if (*out != NULL) {
|
|
p = *out;
|
|
} else {
|
|
start = p = OPENSSL_malloc(outlen);
|
|
if (p == NULL) {
|
|
PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
cctx = EVP_CIPHER_CTX_new();
|
|
if (cctx == NULL)
|
|
goto error;
|
|
|
|
write_ledword(&p, MS_PVKMAGIC);
|
|
write_ledword(&p, 0);
|
|
if (EVP_PKEY_id(pk) == 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) {
|
|
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_free(cctx);
|
|
|
|
if (*out == NULL)
|
|
*out = start;
|
|
|
|
return outlen;
|
|
|
|
error:
|
|
EVP_CIPHER_CTX_free(cctx);
|
|
if (*out == NULL)
|
|
OPENSSL_free(start);
|
|
return -1;
|
|
}
|
|
|
|
int i2b_PVK_bio(BIO *out, const 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
|