| /* |
| * Copyright 2005-2020 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| /* |
| * Support for PVK format keys and related structures (such a PUBLICKEYBLOB |
| * and PRIVATEKEYBLOB). |
| */ |
| |
| #include "internal/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 = (unsigned int)*p++; |
| ret |= (unsigned int)*p++ << 8; |
| ret |= (unsigned int)*p++ << 16; |
| ret |= (unsigned int)*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) |
| { |
| *r = BN_lebin2bn(*in, nbyte, NULL); |
| if (*r == NULL) |
| return 0; |
| *in += nbyte; |
| return 1; |
| } |
| |
| /* 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 |
| |
| /* Maximum length of a blob after header */ |
| # define BLOB_MAX_LENGTH 102400 |
| |
| /* 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 |
| /* Maximum length in PVK header */ |
| # define PVK_MAX_KEYLEN 102400 |
| /* Maximum salt length */ |
| # define PVK_MAX_SALTLEN 10240 |
| |
| static EVP_PKEY *b2i_rsa(const unsigned char **in, |
| unsigned int bitlen, int ispub); |
| static EVP_PKEY *b2i_dss(const unsigned char **in, |
| 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; |
| /* fall thru */ |
| 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; |
| /* fall thru */ |
| 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, bitlen, ispub); |
| else |
| return b2i_rsa(&p, 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); |
| if (length > BLOB_MAX_LENGTH) { |
| PEMerr(PEM_F_DO_B2I_BIO, PEM_R_HEADER_TOO_LONG); |
| return NULL; |
| } |
| buf = OPENSSL_malloc(length); |
| if (buf == NULL) { |
| 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, bitlen, ispub); |
| else |
| ret = b2i_rsa(&p, bitlen, ispub); |
| |
| err: |
| OPENSSL_free(buf); |
| return ret; |
| } |
| |
| static EVP_PKEY *b2i_dss(const unsigned char **in, |
| unsigned int bitlen, int ispub) |
| { |
| const unsigned char *p = *in; |
| EVP_PKEY *ret = NULL; |
| DSA *dsa = NULL; |
| BN_CTX *ctx = NULL; |
| unsigned int nbyte; |
| BIGNUM *pbn = NULL, *qbn = NULL, *gbn = NULL, *priv_key = NULL; |
| BIGNUM *pub_key = NULL; |
| |
| nbyte = (bitlen + 7) >> 3; |
| |
| dsa = DSA_new(); |
| ret = EVP_PKEY_new(); |
| if (dsa == NULL || ret == NULL) |
| goto memerr; |
| if (!read_lebn(&p, nbyte, &pbn)) |
| goto memerr; |
| |
| if (!read_lebn(&p, 20, &qbn)) |
| goto memerr; |
| |
| if (!read_lebn(&p, nbyte, &gbn)) |
| goto memerr; |
| |
| if (ispub) { |
| if (!read_lebn(&p, nbyte, &pub_key)) |
| goto memerr; |
| } else { |
| if (!read_lebn(&p, 20, &priv_key)) |
| goto memerr; |
| |
| /* Set constant time flag before public key calculation */ |
| BN_set_flags(priv_key, BN_FLG_CONSTTIME); |
| |
| /* Calculate public key */ |
| pub_key = BN_new(); |
| if (pub_key == NULL) |
| goto memerr; |
| if ((ctx = BN_CTX_new()) == NULL) |
| goto memerr; |
| |
| if (!BN_mod_exp(pub_key, gbn, priv_key, pbn, ctx)) |
| goto memerr; |
| |
| BN_CTX_free(ctx); |
| ctx = NULL; |
| } |
| if (!DSA_set0_pqg(dsa, pbn, qbn, gbn)) |
| goto memerr; |
| pbn = qbn = gbn = NULL; |
| if (!DSA_set0_key(dsa, pub_key, priv_key)) |
| goto memerr; |
| pub_key = priv_key = NULL; |
| |
| if (!EVP_PKEY_set1_DSA(ret, dsa)) |
| goto memerr; |
| DSA_free(dsa); |
| *in = p; |
| return ret; |
| |
| memerr: |
| PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE); |
| DSA_free(dsa); |
| BN_free(pbn); |
| BN_free(qbn); |
| BN_free(gbn); |
| BN_free(pub_key); |
| BN_free(priv_key); |
| EVP_PKEY_free(ret); |
| BN_CTX_free(ctx); |
| return NULL; |
| } |
| |
| static EVP_PKEY *b2i_rsa(const unsigned char **in, |
| unsigned int bitlen, int ispub) |
| { |
| const unsigned char *pin = *in; |
| EVP_PKEY *ret = NULL; |
| BIGNUM *e = NULL, *n = NULL, *d = NULL; |
| BIGNUM *p = NULL, *q = NULL, *dmp1 = NULL, *dmq1 = NULL, *iqmp = 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 == NULL || ret == NULL) |
| goto memerr; |
| e = BN_new(); |
| if (e == NULL) |
| goto memerr; |
| if (!BN_set_word(e, read_ledword(&pin))) |
| goto memerr; |
| if (!read_lebn(&pin, nbyte, &n)) |
| goto memerr; |
| if (!ispub) { |
| if (!read_lebn(&pin, hnbyte, &p)) |
| goto memerr; |
| if (!read_lebn(&pin, hnbyte, &q)) |
| goto memerr; |
| if (!read_lebn(&pin, hnbyte, &dmp1)) |
| goto memerr; |
| if (!read_lebn(&pin, hnbyte, &dmq1)) |
| goto memerr; |
| if (!read_lebn(&pin, hnbyte, &iqmp)) |
| goto memerr; |
| if (!read_lebn(&pin, nbyte, &d)) |
| goto memerr; |
| if (!RSA_set0_factors(rsa, p, q)) |
| goto memerr; |
| p = q = NULL; |
| if (!RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp)) |
| goto memerr; |
| dmp1 = dmq1 = iqmp = NULL; |
| } |
| if (!RSA_set0_key(rsa, n, e, d)) |
| goto memerr; |
| n = e = d = NULL; |
| |
| if (!EVP_PKEY_set1_RSA(ret, rsa)) |
| goto memerr; |
| RSA_free(rsa); |
| *in = pin; |
| return ret; |
| memerr: |
| PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE); |
| BN_free(e); |
| BN_free(n); |
| BN_free(p); |
| BN_free(q); |
| BN_free(dmp1); |
| BN_free(dmq1); |
| BN_free(iqmp); |
| BN_free(d); |
| RSA_free(rsa); |
| 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) |
| { |
| BN_bn2lebinpad(bn, *out, 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; |
| int pktype = EVP_PKEY_id(pk); |
| if (pktype == EVP_PKEY_DSA) { |
| bitlen = check_bitlen_dsa(EVP_PKEY_get0_DSA(pk), ispub, &magic); |
| keyalg = MS_KEYALG_DSS_SIGN; |
| } else if (pktype == EVP_PKEY_RSA) { |
| bitlen = check_bitlen_rsa(EVP_PKEY_get0_RSA(pk), 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 { |
| if ((p = OPENSSL_malloc(outlen)) == NULL) { |
| PEMerr(PEM_F_DO_I2B, ERR_R_MALLOC_FAILURE); |
| 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, EVP_PKEY_get0_DSA(pk), ispub); |
| else |
| write_rsa(&p, EVP_PKEY_get0_RSA(pk), 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; |
| 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, 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; |
| } |
| } 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) { |
| 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, 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_EncryptUpdate(cctx, p, &enctmplen, p, pklen - 8)) |
| goto error; |
| if (!EVP_EncryptFinal_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, 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) { |
| return outlen; |
| } |
| PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE); |
| return -1; |
| } |
| |
| # endif |
| |
| #endif |