diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/pem/pvkfmt.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/pem/pvkfmt.c | 881 |
1 files changed, 881 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/pem/pvkfmt.c b/openssl-1.1.0h/crypto/pem/pvkfmt.c new file mode 100644 index 0000000..d0a4239 --- /dev/null +++ b/openssl-1.1.0h/crypto/pem/pvkfmt.c @@ -0,0 +1,881 @@ +/* + * Copyright 2005-2018 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 = *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) +{ + *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; + + /* 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 { + p = OPENSSL_malloc(outlen); + if (p == NULL) + 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; + + EVP_CIPHER_CTX *cctx = EVP_CIPHER_CTX_new(); + 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); + 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; + 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_free(cctx); + 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_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, 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 |