/* $OpenBSD: n_pkey.c,v 1.32 2018/08/05 13:35:45 bcook Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * 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 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 acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS 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 AUTHOR OR 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. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <stdio.h> #include <string.h> #include <openssl/opensslconf.h> #ifndef OPENSSL_NO_RSA #include <openssl/asn1t.h> #include <openssl/err.h> #include <openssl/evp.h> #include <openssl/objects.h> #include <openssl/rsa.h> #include <openssl/x509.h> #ifndef OPENSSL_NO_RC4 typedef struct netscape_pkey_st { long version; X509_ALGOR *algor; ASN1_OCTET_STRING *private_key; } NETSCAPE_PKEY; typedef struct netscape_encrypted_pkey_st { ASN1_OCTET_STRING *os; /* This is the same structure as DigestInfo so use it: * although this isn't really anything to do with * digests. */ X509_SIG *enckey; } NETSCAPE_ENCRYPTED_PKEY; static const ASN1_AUX NETSCAPE_ENCRYPTED_PKEY_aux = { .flags = ASN1_AFLG_BROKEN, }; static const ASN1_TEMPLATE NETSCAPE_ENCRYPTED_PKEY_seq_tt[] = { { .offset = offsetof(NETSCAPE_ENCRYPTED_PKEY, os), .field_name = "os", .item = &ASN1_OCTET_STRING_it, }, { .offset = offsetof(NETSCAPE_ENCRYPTED_PKEY, enckey), .field_name = "enckey", .item = &X509_SIG_it, }, }; const ASN1_ITEM NETSCAPE_ENCRYPTED_PKEY_it = { .itype = ASN1_ITYPE_SEQUENCE, .utype = V_ASN1_SEQUENCE, .templates = NETSCAPE_ENCRYPTED_PKEY_seq_tt, .tcount = sizeof(NETSCAPE_ENCRYPTED_PKEY_seq_tt) / sizeof(ASN1_TEMPLATE), .funcs = &NETSCAPE_ENCRYPTED_PKEY_aux, .size = sizeof(NETSCAPE_ENCRYPTED_PKEY), .sname = "NETSCAPE_ENCRYPTED_PKEY", }; NETSCAPE_ENCRYPTED_PKEY *NETSCAPE_ENCRYPTED_PKEY_new(void); void NETSCAPE_ENCRYPTED_PKEY_free(NETSCAPE_ENCRYPTED_PKEY *a); NETSCAPE_ENCRYPTED_PKEY *d2i_NETSCAPE_ENCRYPTED_PKEY(NETSCAPE_ENCRYPTED_PKEY **a, const unsigned char **in, long len); int i2d_NETSCAPE_ENCRYPTED_PKEY(const NETSCAPE_ENCRYPTED_PKEY *a, unsigned char **out); NETSCAPE_ENCRYPTED_PKEY * d2i_NETSCAPE_ENCRYPTED_PKEY(NETSCAPE_ENCRYPTED_PKEY **a, const unsigned char **in, long len) { return (NETSCAPE_ENCRYPTED_PKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, &NETSCAPE_ENCRYPTED_PKEY_it); } int i2d_NETSCAPE_ENCRYPTED_PKEY(const NETSCAPE_ENCRYPTED_PKEY *a, unsigned char **out) { return ASN1_item_i2d((ASN1_VALUE *)a, out, &NETSCAPE_ENCRYPTED_PKEY_it); } NETSCAPE_ENCRYPTED_PKEY * NETSCAPE_ENCRYPTED_PKEY_new(void) { return (NETSCAPE_ENCRYPTED_PKEY *)ASN1_item_new(&NETSCAPE_ENCRYPTED_PKEY_it); } void NETSCAPE_ENCRYPTED_PKEY_free(NETSCAPE_ENCRYPTED_PKEY *a) { ASN1_item_free((ASN1_VALUE *)a, &NETSCAPE_ENCRYPTED_PKEY_it); } static const ASN1_TEMPLATE NETSCAPE_PKEY_seq_tt[] = { { .offset = offsetof(NETSCAPE_PKEY, version), .field_name = "version", .item = &LONG_it, }, { .offset = offsetof(NETSCAPE_PKEY, algor), .field_name = "algor", .item = &X509_ALGOR_it, }, { .offset = offsetof(NETSCAPE_PKEY, private_key), .field_name = "private_key", .item = &ASN1_OCTET_STRING_it, }, }; const ASN1_ITEM NETSCAPE_PKEY_it = { .itype = ASN1_ITYPE_SEQUENCE, .utype = V_ASN1_SEQUENCE, .templates = NETSCAPE_PKEY_seq_tt, .tcount = sizeof(NETSCAPE_PKEY_seq_tt) / sizeof(ASN1_TEMPLATE), .size = sizeof(NETSCAPE_PKEY), .sname = "NETSCAPE_PKEY", }; NETSCAPE_PKEY *NETSCAPE_PKEY_new(void); void NETSCAPE_PKEY_free(NETSCAPE_PKEY *a); NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a, const unsigned char **in, long len); int i2d_NETSCAPE_PKEY(const NETSCAPE_PKEY *a, unsigned char **out); NETSCAPE_PKEY * d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a, const unsigned char **in, long len) { return (NETSCAPE_PKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, &NETSCAPE_PKEY_it); } int i2d_NETSCAPE_PKEY(const NETSCAPE_PKEY *a, unsigned char **out) { return ASN1_item_i2d((ASN1_VALUE *)a, out, &NETSCAPE_PKEY_it); } NETSCAPE_PKEY * NETSCAPE_PKEY_new(void) { return (NETSCAPE_PKEY *)ASN1_item_new(&NETSCAPE_PKEY_it); } void NETSCAPE_PKEY_free(NETSCAPE_PKEY *a) { ASN1_item_free((ASN1_VALUE *)a, &NETSCAPE_PKEY_it); } static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey); int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, int (*cb)(char *buf, int len, const char *prompt, int verify)) { return i2d_RSA_NET(a, pp, cb, 0); } int i2d_RSA_NET(const RSA *a, unsigned char **pp, int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey) { int i, j, ret = 0; int rsalen, pkeylen, olen; NETSCAPE_PKEY *pkey = NULL; NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; unsigned char buf[256], *zz; unsigned char key[EVP_MAX_KEY_LENGTH]; EVP_CIPHER_CTX ctx; EVP_CIPHER_CTX_init(&ctx); if (a == NULL) return (0); if ((pkey = NETSCAPE_PKEY_new()) == NULL) goto err; if ((enckey = NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) goto err; pkey->version = 0; pkey->algor->algorithm = OBJ_nid2obj(NID_rsaEncryption); if ((pkey->algor->parameter = ASN1_TYPE_new()) == NULL) goto err; pkey->algor->parameter->type = V_ASN1_NULL; rsalen = i2d_RSAPrivateKey(a, NULL); /* Fake some octet strings just for the initial length * calculation. */ pkey->private_key->length = rsalen; pkeylen = i2d_NETSCAPE_PKEY(pkey, NULL); enckey->enckey->digest->length = pkeylen; enckey->os->length = 11; /* "private-key" */ enckey->enckey->algor->algorithm = OBJ_nid2obj(NID_rc4); if ((enckey->enckey->algor->parameter = ASN1_TYPE_new()) == NULL) goto err; enckey->enckey->algor->parameter->type = V_ASN1_NULL; if (pp == NULL) { olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL); NETSCAPE_PKEY_free(pkey); NETSCAPE_ENCRYPTED_PKEY_free(enckey); return olen; } /* Since its RC4 encrypted length is actual length */ if ((zz = malloc(rsalen)) == NULL) { ASN1error(ERR_R_MALLOC_FAILURE); goto err; } pkey->private_key->data = zz; /* Write out private key encoding */ i2d_RSAPrivateKey(a, &zz); if ((zz = malloc(pkeylen)) == NULL) { ASN1error(ERR_R_MALLOC_FAILURE); goto err; } enckey->enckey->digest->data = zz; if (!ASN1_STRING_set(enckey->os, "private-key", -1)) { ASN1error(ERR_R_MALLOC_FAILURE); goto err; } i2d_NETSCAPE_PKEY(pkey, &zz); /* Wipe the private key encoding */ explicit_bzero(pkey->private_key->data, rsalen); if (cb == NULL) cb = EVP_read_pw_string; i = cb((char *)buf, sizeof(buf), "Enter Private Key password:", 1); if (i != 0) { ASN1error(ASN1_R_BAD_PASSWORD_READ); goto err; } i = strlen((char *)buf); /* If the key is used for SGC the algorithm is modified a little. */ if (sgckey) { if (!EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL)) goto err; memcpy(buf + 16, "SGCKEYSALT", 10); i = 26; } if (!EVP_BytesToKey(EVP_rc4(), EVP_md5(), NULL, buf, i,1, key, NULL)) goto err; explicit_bzero(buf, sizeof(buf)); /* Encrypt private key in place */ zz = enckey->enckey->digest->data; if (!EVP_EncryptInit_ex(&ctx, EVP_rc4(), NULL, key, NULL)) goto err; if (!EVP_EncryptUpdate(&ctx, zz, &i, zz, pkeylen)) goto err; if (!EVP_EncryptFinal_ex(&ctx, zz + i, &j)) goto err; ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp); err: EVP_CIPHER_CTX_cleanup(&ctx); NETSCAPE_ENCRYPTED_PKEY_free(enckey); NETSCAPE_PKEY_free(pkey); return (ret); } RSA * d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, int (*cb)(char *buf, int len, const char *prompt, int verify)) { return d2i_RSA_NET(a, pp, length, cb, 0); } RSA * d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey) { RSA *ret = NULL; const unsigned char *p; NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; p = *pp; enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length); if (!enckey) { ASN1error(ASN1_R_DECODING_ERROR); return NULL; } /* XXX 11 == strlen("private-key") */ if (enckey->os->length != 11 || memcmp("private-key", enckey->os->data, 11) != 0) { ASN1error(ASN1_R_PRIVATE_KEY_HEADER_MISSING); goto err; } if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4) { ASN1error(ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM); goto err; } if (cb == NULL) cb = EVP_read_pw_string; if ((ret = d2i_RSA_NET_2(a, enckey->enckey->digest, cb, sgckey)) == NULL) goto err; *pp = p; err: NETSCAPE_ENCRYPTED_PKEY_free(enckey); return ret; } static RSA * d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey) { NETSCAPE_PKEY *pkey = NULL; RSA *ret = NULL; int i, j; unsigned char buf[256]; const unsigned char *zz; unsigned char key[EVP_MAX_KEY_LENGTH]; EVP_CIPHER_CTX ctx; EVP_CIPHER_CTX_init(&ctx); i=cb((char *)buf, sizeof(buf), "Enter Private Key password:",0); if (i != 0) { ASN1error(ASN1_R_BAD_PASSWORD_READ); goto err; } i = strlen((char *)buf); if (sgckey){ if (!EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL)) goto err; memcpy(buf + 16, "SGCKEYSALT", 10); i = 26; } if (!EVP_BytesToKey(EVP_rc4(), EVP_md5(), NULL, buf, i,1, key, NULL)) goto err; explicit_bzero(buf, sizeof(buf)); if (!EVP_DecryptInit_ex(&ctx, EVP_rc4(), NULL, key, NULL)) goto err; if (!EVP_DecryptUpdate(&ctx, os->data, &i, os->data, os->length)) goto err; if (!EVP_DecryptFinal_ex(&ctx, &(os->data[i]), &j)) goto err; os->length = i + j; zz = os->data; if ((pkey = d2i_NETSCAPE_PKEY(NULL, &zz, os->length)) == NULL) { ASN1error(ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY); goto err; } zz = pkey->private_key->data; if ((ret = d2i_RSAPrivateKey(a, &zz, pkey->private_key->length)) == NULL) { ASN1error(ASN1_R_UNABLE_TO_DECODE_RSA_KEY); goto err; } err: EVP_CIPHER_CTX_cleanup(&ctx); NETSCAPE_PKEY_free(pkey); return (ret); } #endif /* OPENSSL_NO_RC4 */ #endif