/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL * project 1999. */ /* ==================================================================== * Copyright (c) 1999 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). */ #include #include #include #include #include #include #include #include #include "../evp/internal.h" #define PKCS12_KEY_ID 1 #define PKCS12_IV_ID 2 static int ascii_to_ucs2(const char *ascii, size_t ascii_len, uint8_t **out, size_t *out_len) { uint8_t *unitmp; size_t ulen, i; ulen = ascii_len * 2 + 2; if (ulen < ascii_len) { return 0; } unitmp = OPENSSL_malloc(ulen); if (unitmp == NULL) { return 0; } for (i = 0; i < ulen - 2; i += 2) { unitmp[i] = 0; unitmp[i + 1] = ascii[i >> 1]; } /* Make result double null terminated */ unitmp[ulen - 2] = 0; unitmp[ulen - 1] = 0; *out_len = ulen; *out = unitmp; return 1; } static int pkcs12_key_gen_raw(const uint8_t *pass_raw, size_t pass_raw_len, uint8_t *salt, size_t salt_len, int id, int iterations, size_t out_len, uint8_t *out, const EVP_MD *md_type) { uint8_t *B, *D, *I, *p, *Ai; int Slen, Plen, Ilen, Ijlen; int i, j, v; size_t u; int ret = 0; BIGNUM *Ij, *Bpl1; /* These hold Ij and B + 1 */ EVP_MD_CTX ctx; EVP_MD_CTX_init(&ctx); v = EVP_MD_block_size(md_type); u = EVP_MD_size(md_type); D = OPENSSL_malloc(v); Ai = OPENSSL_malloc(u); B = OPENSSL_malloc(v + 1); Slen = v * ((salt_len + v - 1) / v); if (pass_raw_len) Plen = v * ((pass_raw_len + v - 1) / v); else Plen = 0; Ilen = Slen + Plen; I = OPENSSL_malloc(Ilen); Ij = BN_new(); Bpl1 = BN_new(); if (!D || !Ai || !B || !I || !Ij || !Bpl1) goto err; for (i = 0; i < v; i++) D[i] = id; p = I; for (i = 0; i < Slen; i++) *p++ = salt[i % salt_len]; for (i = 0; i < Plen; i++) *p++ = pass_raw[i % pass_raw_len]; for (;;) { if (!EVP_DigestInit_ex(&ctx, md_type, NULL) || !EVP_DigestUpdate(&ctx, D, v) || !EVP_DigestUpdate(&ctx, I, Ilen) || !EVP_DigestFinal_ex(&ctx, Ai, NULL)) { goto err; } for (j = 1; j < iterations; j++) { if (!EVP_DigestInit_ex(&ctx, md_type, NULL) || !EVP_DigestUpdate(&ctx, Ai, u) || !EVP_DigestFinal_ex(&ctx, Ai, NULL)) { goto err; } } memcpy(out, Ai, out_len < u ? out_len : u); if (u >= out_len) { ret = 1; goto end; } out_len -= u; out += u; for (j = 0; j < v; j++) B[j] = Ai[j % u]; /* Work out B + 1 first then can use B as tmp space */ if (!BN_bin2bn(B, v, Bpl1)) goto err; if (!BN_add_word(Bpl1, 1)) goto err; for (j = 0; j < Ilen; j += v) { if (!BN_bin2bn(I + j, v, Ij)) goto err; if (!BN_add(Ij, Ij, Bpl1)) goto err; if (!BN_bn2bin(Ij, B)) goto err; Ijlen = BN_num_bytes(Ij); /* If more than 2^(v*8) - 1 cut off MSB */ if (Ijlen > v) { if (!BN_bn2bin(Ij, B)) goto err; memcpy(I + j, B + 1, v); /* If less than v bytes pad with zeroes */ } else if (Ijlen < v) { memset(I + j, 0, v - Ijlen); if (!BN_bn2bin(Ij, I + j + v - Ijlen)) goto err; } else if (!BN_bn2bin(Ij, I + j)) { goto err; } } } err: OPENSSL_PUT_ERROR(PKCS8, pkcs12_key_gen_raw, ERR_R_MALLOC_FAILURE); end: OPENSSL_free(Ai); OPENSSL_free(B); OPENSSL_free(D); OPENSSL_free(I); BN_free(Ij); BN_free(Bpl1); EVP_MD_CTX_cleanup(&ctx); return ret; } static int pkcs12_pbe_keyivgen(EVP_CIPHER_CTX *ctx, const uint8_t *pass_raw, size_t pass_raw_len, ASN1_TYPE *param, const EVP_CIPHER *cipher, const EVP_MD *md, int is_encrypt) { PBEPARAM *pbe; int salt_len, iterations, ret; uint8_t *salt; const uint8_t *pbuf; uint8_t key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH]; /* Extract useful info from parameter */ if (param == NULL || param->type != V_ASN1_SEQUENCE || param->value.sequence == NULL) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_pbe_keyivgen, PKCS8_R_DECODE_ERROR); return 0; } pbuf = param->value.sequence->data; pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length); if (pbe == NULL) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_pbe_keyivgen, PKCS8_R_DECODE_ERROR); return 0; } if (!pbe->iter) { iterations = 1; } else { iterations = ASN1_INTEGER_get(pbe->iter); } salt = pbe->salt->data; salt_len = pbe->salt->length; if (!pkcs12_key_gen_raw(pass_raw, pass_raw_len, salt, salt_len, PKCS12_KEY_ID, iterations, EVP_CIPHER_key_length(cipher), key, md)) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_pbe_keyivgen, PKCS8_R_KEY_GEN_ERROR); PBEPARAM_free(pbe); return 0; } if (!pkcs12_key_gen_raw(pass_raw, pass_raw_len, salt, salt_len, PKCS12_IV_ID, iterations, EVP_CIPHER_iv_length(cipher), iv, md)) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_pbe_keyivgen, PKCS8_R_KEY_GEN_ERROR); PBEPARAM_free(pbe); return 0; } PBEPARAM_free(pbe); ret = EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, is_encrypt); OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH); OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH); return ret; } typedef int (*keygen_func)(EVP_CIPHER_CTX *ctx, const uint8_t *pass_raw, size_t pass_raw_len, ASN1_TYPE *param, const EVP_CIPHER *cipher, const EVP_MD *md, int is_encrypt); struct pbe_suite { int pbe_nid; int cipher_nid; int md_nid; keygen_func keygen; }; static const struct pbe_suite kBuiltinPBE[] = { { NID_pbe_WithSHA1And128BitRC4, NID_rc4, NID_sha1, pkcs12_pbe_keyivgen, }, { NID_pbe_WithSHA1And3_Key_TripleDES_CBC, NID_des_ede3_cbc, NID_sha1, pkcs12_pbe_keyivgen, }, }; static int pbe_cipher_init(ASN1_OBJECT *pbe_obj, const uint8_t *pass_raw, size_t pass_raw_len, ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int is_encrypt) { const EVP_CIPHER *cipher; const EVP_MD *md; unsigned i; const struct pbe_suite *suite = NULL; const int pbe_nid = OBJ_obj2nid(pbe_obj); for (i = 0; i < sizeof(kBuiltinPBE) / sizeof(struct pbe_suite); i++) { suite = &kBuiltinPBE[i]; if (suite->pbe_nid == pbe_nid) { break; } } if (suite == NULL) { char obj_str[80]; OPENSSL_PUT_ERROR(PKCS8, pbe_cipher_init, PKCS8_R_UNKNOWN_ALGORITHM); if (!pbe_obj) { strncpy(obj_str, "NULL", sizeof(obj_str)); } else { i2t_ASN1_OBJECT(obj_str, sizeof(obj_str), pbe_obj); } ERR_add_error_data(2, "TYPE=", obj_str); return 0; } if (suite->cipher_nid == -1) { cipher = NULL; } else { cipher = EVP_get_cipherbynid(suite->cipher_nid); if (!cipher) { OPENSSL_PUT_ERROR(PKCS8, pbe_cipher_init, PKCS8_R_UNKNOWN_CIPHER); return 0; } } if (suite->md_nid == -1) { md = NULL; } else { md = EVP_get_digestbynid(suite->md_nid); if (!md) { OPENSSL_PUT_ERROR(PKCS8, pbe_cipher_init, PKCS8_R_UNKNOWN_DIGEST); return 0; } } if (!suite->keygen(ctx, pass_raw, pass_raw_len, param, cipher, md, is_encrypt)) { OPENSSL_PUT_ERROR(PKCS8, pbe_cipher_init, PKCS8_R_KEYGEN_FAILURE); return 0; } return 1; } static int pbe_crypt(const X509_ALGOR *algor, const uint8_t *pass_raw, size_t pass_raw_len, uint8_t *in, size_t in_len, uint8_t **out, size_t *out_len, int is_encrypt) { uint8_t *buf; int n, ret = 0; EVP_CIPHER_CTX ctx; unsigned block_size; EVP_CIPHER_CTX_init(&ctx); if (!pbe_cipher_init(algor->algorithm, pass_raw, pass_raw_len, algor->parameter, &ctx, is_encrypt)) { OPENSSL_PUT_ERROR(PKCS8, pbe_crypt, PKCS8_R_UNKNOWN_CIPHER_ALGORITHM); return 0; } block_size = EVP_CIPHER_CTX_block_size(&ctx); if (in_len + block_size < in_len) { OPENSSL_PUT_ERROR(PKCS8, pbe_crypt, PKCS8_R_TOO_LONG); goto err; } buf = OPENSSL_malloc(in_len + block_size); if (buf == NULL) { OPENSSL_PUT_ERROR(PKCS8, pbe_crypt, ERR_R_MALLOC_FAILURE); goto err; } if (!EVP_CipherUpdate(&ctx, buf, &n, in, in_len)) { OPENSSL_free(buf); OPENSSL_PUT_ERROR(PKCS8, pbe_crypt, ERR_R_EVP_LIB); goto err; } *out_len = n; if (!EVP_CipherFinal_ex(&ctx, buf + n, &n)) { OPENSSL_free(buf); OPENSSL_PUT_ERROR(PKCS8, pbe_crypt, ERR_R_EVP_LIB); goto err; } *out_len += n; *out = buf; ret = 1; err: EVP_CIPHER_CTX_cleanup(&ctx); return ret; } static void *pkcs12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it, const uint8_t *pass_raw, size_t pass_raw_len, ASN1_OCTET_STRING *oct) { uint8_t *out; const uint8_t *p; void *ret; size_t out_len; if (!pbe_crypt(algor, pass_raw, pass_raw_len, oct->data, oct->length, &out, &out_len, 0 /* decrypt */)) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_item_decrypt_d2i, PKCS8_R_CRYPT_ERROR); return NULL; } p = out; ret = ASN1_item_d2i(NULL, &p, out_len, it); OPENSSL_cleanse(out, out_len); if (!ret) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_item_decrypt_d2i, PKCS8_R_DECODE_ERROR); } OPENSSL_free(out); return ret; } PKCS8_PRIV_KEY_INFO *PKCS8_decrypt(X509_SIG *pkcs8, const char *pass, int pass_len) { uint8_t *pass_raw = NULL; size_t pass_raw_len = 0; PKCS8_PRIV_KEY_INFO *ret; if (pass) { if (pass_len == -1) { pass_len = strlen(pass); } if (!ascii_to_ucs2(pass, pass_len, &pass_raw, &pass_raw_len)) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_key_gen_asc, PKCS8_R_DECODE_ERROR); return NULL; } } ret = PKCS8_decrypt_pbe(pkcs8, pass_raw, pass_raw_len); if (pass_raw) { OPENSSL_cleanse(pass_raw, pass_raw_len); OPENSSL_free(pass_raw); } return ret; } PKCS8_PRIV_KEY_INFO *PKCS8_decrypt_pbe(X509_SIG *pkcs8, const uint8_t *pass_raw, size_t pass_raw_len) { return pkcs12_item_decrypt_d2i(pkcs8->algor, ASN1_ITEM_rptr(PKCS8_PRIV_KEY_INFO), pass_raw, pass_raw_len, pkcs8->digest); } static ASN1_OCTET_STRING *pkcs12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it, const uint8_t *pass_raw, size_t pass_raw_len, void *obj) { ASN1_OCTET_STRING *oct; uint8_t *in = NULL; int in_len; size_t crypt_len; oct = M_ASN1_OCTET_STRING_new(); if (oct == NULL) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_item_i2d_encrypt, ERR_R_MALLOC_FAILURE); return NULL; } in_len = ASN1_item_i2d(obj, &in, it); if (!in) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_item_i2d_encrypt, PKCS8_R_ENCODE_ERROR); return NULL; } if (!pbe_crypt(algor, pass_raw, pass_raw_len, in, in_len, &oct->data, &crypt_len, 1 /* encrypt */)) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_item_i2d_encrypt, PKCS8_R_ENCRYPT_ERROR); OPENSSL_free(in); return NULL; } oct->length = crypt_len; OPENSSL_cleanse(in, in_len); OPENSSL_free(in); return oct; } X509_SIG *PKCS8_encrypt(int pbe_nid, const EVP_CIPHER *cipher, const char *pass, int pass_len, uint8_t *salt, size_t salt_len, int iterations, PKCS8_PRIV_KEY_INFO *p8inf) { uint8_t *pass_raw = NULL; size_t pass_raw_len = 0; X509_SIG *ret; if (pass) { if (pass_len == -1) { pass_len = strlen(pass); } if (!ascii_to_ucs2(pass, pass_len, &pass_raw, &pass_raw_len)) { OPENSSL_PUT_ERROR(PKCS8, pkcs12_key_gen_asc, PKCS8_R_DECODE_ERROR); return NULL; } } ret = PKCS8_encrypt_pbe(pbe_nid, pass_raw, pass_raw_len, salt, salt_len, iterations, p8inf); if (pass_raw) { OPENSSL_cleanse(pass_raw, pass_raw_len); OPENSSL_free(pass_raw); } return ret; } X509_SIG *PKCS8_encrypt_pbe(int pbe_nid, const uint8_t *pass_raw, size_t pass_raw_len, uint8_t *salt, size_t salt_len, int iterations, PKCS8_PRIV_KEY_INFO *p8inf) { X509_SIG *pkcs8 = NULL; X509_ALGOR *pbe; pkcs8 = X509_SIG_new(); if (pkcs8 == NULL) { OPENSSL_PUT_ERROR(PKCS8, PKCS8_encrypt_pbe, ERR_R_MALLOC_FAILURE); goto err; } pbe = PKCS5_pbe_set(pbe_nid, iterations, salt, salt_len); if (!pbe) { OPENSSL_PUT_ERROR(PKCS8, PKCS8_encrypt_pbe, ERR_R_ASN1_LIB); goto err; } X509_ALGOR_free(pkcs8->algor); pkcs8->algor = pbe; M_ASN1_OCTET_STRING_free(pkcs8->digest); pkcs8->digest = pkcs12_item_i2d_encrypt( pbe, ASN1_ITEM_rptr(PKCS8_PRIV_KEY_INFO), pass_raw, pass_raw_len, p8inf); if (!pkcs8->digest) { OPENSSL_PUT_ERROR(PKCS8, PKCS8_encrypt_pbe, PKCS8_R_ENCRYPT_ERROR); goto err; } return pkcs8; err: X509_SIG_free(pkcs8); return NULL; } EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8) { EVP_PKEY *pkey = NULL; ASN1_OBJECT *algoid; char obj_tmp[80]; if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8)) return NULL; pkey = EVP_PKEY_new(); if (pkey == NULL) { OPENSSL_PUT_ERROR(PKCS8, EVP_PKCS82PKEY, ERR_R_MALLOC_FAILURE); return NULL; } if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) { OPENSSL_PUT_ERROR(PKCS8, EVP_PKCS82PKEY, PKCS8_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM); i2t_ASN1_OBJECT(obj_tmp, 80, algoid); ERR_add_error_data(2, "TYPE=", obj_tmp); goto error; } if (pkey->ameth->priv_decode) { if (!pkey->ameth->priv_decode(pkey, p8)) { OPENSSL_PUT_ERROR(PKCS8, EVP_PKCS82PKEY, PKCS8_R_PRIVATE_KEY_DECODE_ERROR); goto error; } } else { OPENSSL_PUT_ERROR(PKCS8, EVP_PKCS82PKEY, PKCS8_R_METHOD_NOT_SUPPORTED); goto error; } return pkey; error: EVP_PKEY_free(pkey); return NULL; } PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey) { PKCS8_PRIV_KEY_INFO *p8; p8 = PKCS8_PRIV_KEY_INFO_new(); if (p8 == NULL) { OPENSSL_PUT_ERROR(PKCS8, EVP_PKEY2PKCS8, ERR_R_MALLOC_FAILURE); return NULL; } p8->broken = PKCS8_OK; if (pkey->ameth) { if (pkey->ameth->priv_encode) { if (!pkey->ameth->priv_encode(p8, pkey)) { OPENSSL_PUT_ERROR(PKCS8, EVP_PKEY2PKCS8, PKCS8_R_PRIVATE_KEY_ENCODE_ERROR); goto error; } } else { OPENSSL_PUT_ERROR(PKCS8, EVP_PKEY2PKCS8, PKCS8_R_METHOD_NOT_SUPPORTED); goto error; } } else { OPENSSL_PUT_ERROR(PKCS8, EVP_PKEY2PKCS8, PKCS8_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM); goto error; } return p8; error: PKCS8_PRIV_KEY_INFO_free(p8); return NULL; }