crypto/evp/p5_crpt2.c - third_party/openssl - Git at Google

 /*
  * Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (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
  */

 #include <stdio.h>
 #include <stdlib.h>
 #include "internal/cryptlib.h"
 #include <openssl/x509.h>
 #include <openssl/evp.h>
 #include <openssl/kdf.h>
 #include <openssl/hmac.h>
 #include <openssl/trace.h>
 #include <openssl/core_names.h>
 #include "crypto/evp.h"
 #include "evp_local.h"

 int ossl_pkcs5_pbkdf2_hmac_ex(const char *pass, int passlen,
                               const unsigned char *salt, int saltlen, int iter,
                               const EVP_MD *digest, int keylen, unsigned char *out,
                               OSSL_LIB_CTX *libctx, const char *propq)
 {
     const char *empty = "";
     int rv = 1, mode = 1;
     EVP_KDF *kdf;
     EVP_KDF_CTX *kctx;
     const char *mdname = EVP_MD_get0_name(digest);
     OSSL_PARAM params[6], *p = params;

     /* Keep documented behaviour. */
     if (pass == NULL) {
         pass = empty;
         passlen = 0;
     } else if (passlen == -1) {
         passlen = strlen(pass);
     }
     if (salt == NULL && saltlen == 0)
         salt = (unsigned char *)empty;

     kdf = EVP_KDF_fetch(libctx, OSSL_KDF_NAME_PBKDF2, propq);
     if (kdf == NULL)
          return 0;
     kctx = EVP_KDF_CTX_new(kdf);
     EVP_KDF_free(kdf);
     if (kctx == NULL)
         return 0;
     *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_PASSWORD,
                                              (char *)pass, (size_t)passlen);
     *p++ = OSSL_PARAM_construct_int(OSSL_KDF_PARAM_PKCS5, &mode);
     *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT,
                                              (unsigned char *)salt, saltlen);
     *p++ = OSSL_PARAM_construct_int(OSSL_KDF_PARAM_ITER, &iter);
     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
                                             (char *)mdname, 0);
     *p = OSSL_PARAM_construct_end();
     if (EVP_KDF_derive(kctx, out, keylen, params) != 1)
         rv = 0;

     EVP_KDF_CTX_free(kctx);

     OSSL_TRACE_BEGIN(PKCS5V2) {
         BIO_printf(trc_out, "Password:\n");
         BIO_hex_string(trc_out,
                        0, passlen, pass, passlen);
         BIO_printf(trc_out, "\n");
         BIO_printf(trc_out, "Salt:\n");
         BIO_hex_string(trc_out,
                        0, saltlen, salt, saltlen);
         BIO_printf(trc_out, "\n");
         BIO_printf(trc_out, "Iteration count %d\n", iter);
         BIO_printf(trc_out, "Key:\n");
         BIO_hex_string(trc_out,
                        0, keylen, out, keylen);
         BIO_printf(trc_out, "\n");
     } OSSL_TRACE_END(PKCS5V2);
     return rv;
 }

 int PKCS5_PBKDF2_HMAC(const char *pass, int passlen, const unsigned char *salt,
                       int saltlen, int iter, const EVP_MD *digest, int keylen,
                       unsigned char *out)
 {
     return ossl_pkcs5_pbkdf2_hmac_ex(pass, passlen, salt, saltlen, iter, digest,
                                      keylen, out, NULL, NULL);
 }


 int PKCS5_PBKDF2_HMAC_SHA1(const char *pass, int passlen,
                            const unsigned char *salt, int saltlen, int iter,
                            int keylen, unsigned char *out)
 {
     EVP_MD *digest;
     int r = 0;

     if ((digest = EVP_MD_fetch(NULL, SN_sha1, NULL)) != NULL)
         r = ossl_pkcs5_pbkdf2_hmac_ex(pass, passlen, salt, saltlen, iter,
                                       digest, keylen, out, NULL, NULL);
     EVP_MD_free(digest);
     return r;
 }

 /*
  * Now the key derivation function itself. This is a bit evil because it has
  * to check the ASN1 parameters are valid: and there are quite a few of
  * them...
  */

 int PKCS5_v2_PBE_keyivgen_ex(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
                              ASN1_TYPE *param, const EVP_CIPHER *c,
                              const EVP_MD *md, int en_de,
                              OSSL_LIB_CTX *libctx, const char *propq)
 {
     PBE2PARAM *pbe2 = NULL;
     char ciph_name[80];
     const EVP_CIPHER *cipher = NULL;
     EVP_CIPHER *cipher_fetch = NULL;
     EVP_PBE_KEYGEN_EX *kdf;

     int rv = 0;

     pbe2 = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBE2PARAM), param);
     if (pbe2 == NULL) {
         ERR_raise(ERR_LIB_EVP, EVP_R_DECODE_ERROR);
         goto err;
     }

     /* See if we recognise the key derivation function */
     if (!EVP_PBE_find_ex(EVP_PBE_TYPE_KDF, OBJ_obj2nid(pbe2->keyfunc->algorithm),
                          NULL, NULL, NULL, &kdf)) {
         ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_KEY_DERIVATION_FUNCTION);
         goto err;
     }

     /*
      * lets see if we recognise the encryption algorithm.
      */
     if (OBJ_obj2txt(ciph_name, sizeof(ciph_name), pbe2->encryption->algorithm, 0) <= 0) {
         ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_CIPHER);
         goto err;
     }

     (void)ERR_set_mark();
     cipher = cipher_fetch = EVP_CIPHER_fetch(libctx, ciph_name, propq);
     /* Fallback to legacy method */
     if (cipher == NULL)
         cipher = EVP_get_cipherbyname(ciph_name);

     if (cipher == NULL) {
         (void)ERR_clear_last_mark();
         ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_CIPHER);
         goto err;
     }
     (void)ERR_pop_to_mark();

     /* Fixup cipher based on AlgorithmIdentifier */
     if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, en_de))
         goto err;
     if (EVP_CIPHER_asn1_to_param(ctx, pbe2->encryption->parameter) < 0) {
         ERR_raise(ERR_LIB_EVP, EVP_R_CIPHER_PARAMETER_ERROR);
         goto err;
     }
     rv = kdf(ctx, pass, passlen, pbe2->keyfunc->parameter, NULL, NULL, en_de, libctx, propq);
  err:
     EVP_CIPHER_free(cipher_fetch);
     PBE2PARAM_free(pbe2);
     return rv;
 }

 int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
                           ASN1_TYPE *param, const EVP_CIPHER *c,
                           const EVP_MD *md, int en_de)
 {
     return PKCS5_v2_PBE_keyivgen_ex(ctx, pass, passlen, param, c, md, en_de, NULL, NULL);
 }

 int PKCS5_v2_PBKDF2_keyivgen_ex(EVP_CIPHER_CTX *ctx, const char *pass,
                                 int passlen, ASN1_TYPE *param,
                                 const EVP_CIPHER *c, const EVP_MD *md, int en_de,
                                 OSSL_LIB_CTX *libctx, const char *propq)
 {
     unsigned char *salt, key[EVP_MAX_KEY_LENGTH];
     int saltlen, iter, t;
     int rv = 0;
     unsigned int keylen = 0;
     int prf_nid, hmac_md_nid;
     PBKDF2PARAM *kdf = NULL;
     const EVP_MD *prfmd = NULL;
     EVP_MD *prfmd_fetch = NULL;

     if (EVP_CIPHER_CTX_get0_cipher(ctx) == NULL) {
         ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
         goto err;
     }
     keylen = EVP_CIPHER_CTX_get_key_length(ctx);
     OPENSSL_assert(keylen <= sizeof(key));

     /* Decode parameter */

     kdf = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBKDF2PARAM), param);

     if (kdf == NULL) {
         ERR_raise(ERR_LIB_EVP, EVP_R_DECODE_ERROR);
         goto err;
     }

     t = EVP_CIPHER_CTX_get_key_length(ctx);
     if (t < 0) {
         ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
         goto err;
     }
     keylen = t;

     /* Now check the parameters of the kdf */

     if (kdf->keylength && (ASN1_INTEGER_get(kdf->keylength) != (int)keylen)) {
         ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_KEYLENGTH);
         goto err;
     }

     if (kdf->prf)
         prf_nid = OBJ_obj2nid(kdf->prf->algorithm);
     else
         prf_nid = NID_hmacWithSHA1;

     if (!EVP_PBE_find(EVP_PBE_TYPE_PRF, prf_nid, NULL, &hmac_md_nid, 0)) {
         ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_PRF);
         goto err;
     }

     prfmd = prfmd_fetch = EVP_MD_fetch(libctx, OBJ_nid2sn(hmac_md_nid), propq);
     if (prfmd == NULL)
         prfmd = EVP_get_digestbynid(hmac_md_nid);
     if (prfmd == NULL) {
         ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_PRF);
         goto err;
     }

     if (kdf->salt->type != V_ASN1_OCTET_STRING) {
         ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_SALT_TYPE);
         goto err;
     }

     /* it seems that its all OK */
     salt = kdf->salt->value.octet_string->data;
     saltlen = kdf->salt->value.octet_string->length;
     iter = ASN1_INTEGER_get(kdf->iter);
     if (!ossl_pkcs5_pbkdf2_hmac_ex(pass, passlen, salt, saltlen, iter, prfmd,
                                    keylen, key, libctx, propq))
         goto err;
     rv = EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de);
  err:
     OPENSSL_cleanse(key, keylen);
     PBKDF2PARAM_free(kdf);
     EVP_MD_free(prfmd_fetch);
     return rv;
 }

 int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
                              int passlen, ASN1_TYPE *param,
                              const EVP_CIPHER *c, const EVP_MD *md, int en_de)
 {
     return PKCS5_v2_PBKDF2_keyivgen_ex(ctx, pass, passlen, param, c, md, en_de,
                                        NULL, NULL);
 }
	/*
	* Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
	*
	* Licensed under the Apache License 2.0 (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
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include "internal/cryptlib.h"
	#include <openssl/x509.h>
	#include <openssl/evp.h>
	#include <openssl/kdf.h>
	#include <openssl/hmac.h>
	#include <openssl/trace.h>
	#include <openssl/core_names.h>
	#include "crypto/evp.h"
	#include "evp_local.h"

	int ossl_pkcs5_pbkdf2_hmac_ex(const char *pass, int passlen,
	const unsigned char *salt, int saltlen, int iter,
	const EVP_MD digest, int keylen, unsigned char out,
	OSSL_LIB_CTX libctx, const char propq)
	{
	const char *empty = "";
	int rv = 1, mode = 1;
	EVP_KDF *kdf;
	EVP_KDF_CTX *kctx;
	const char *mdname = EVP_MD_get0_name(digest);
	OSSL_PARAM params[6], *p = params;

	/* Keep documented behaviour. */
	if (pass == NULL) {
	pass = empty;
	passlen = 0;
	} else if (passlen == -1) {
	passlen = strlen(pass);
	}
	if (salt == NULL && saltlen == 0)
	salt = (unsigned char *)empty;

	kdf = EVP_KDF_fetch(libctx, OSSL_KDF_NAME_PBKDF2, propq);
	if (kdf == NULL)
	return 0;
	kctx = EVP_KDF_CTX_new(kdf);
	EVP_KDF_free(kdf);
	if (kctx == NULL)
	return 0;
	*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_PASSWORD,
	(char *)pass, (size_t)passlen);
	*p++ = OSSL_PARAM_construct_int(OSSL_KDF_PARAM_PKCS5, &mode);
	*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT,
	(unsigned char *)salt, saltlen);
	*p++ = OSSL_PARAM_construct_int(OSSL_KDF_PARAM_ITER, &iter);
	*p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
	(char *)mdname, 0);
	*p = OSSL_PARAM_construct_end();
	if (EVP_KDF_derive(kctx, out, keylen, params) != 1)
	rv = 0;

	EVP_KDF_CTX_free(kctx);

	OSSL_TRACE_BEGIN(PKCS5V2) {
	BIO_printf(trc_out, "Password:\n");
	BIO_hex_string(trc_out,
	0, passlen, pass, passlen);
	BIO_printf(trc_out, "\n");
	BIO_printf(trc_out, "Salt:\n");
	BIO_hex_string(trc_out,
	0, saltlen, salt, saltlen);
	BIO_printf(trc_out, "\n");
	BIO_printf(trc_out, "Iteration count %d\n", iter);
	BIO_printf(trc_out, "Key:\n");
	BIO_hex_string(trc_out,
	0, keylen, out, keylen);
	BIO_printf(trc_out, "\n");
	} OSSL_TRACE_END(PKCS5V2);
	return rv;
	}

	int PKCS5_PBKDF2_HMAC(const char pass, int passlen, const unsigned char salt,
	int saltlen, int iter, const EVP_MD *digest, int keylen,
	unsigned char *out)
	{
	return ossl_pkcs5_pbkdf2_hmac_ex(pass, passlen, salt, saltlen, iter, digest,
	keylen, out, NULL, NULL);
	}


	int PKCS5_PBKDF2_HMAC_SHA1(const char *pass, int passlen,
	const unsigned char *salt, int saltlen, int iter,
	int keylen, unsigned char *out)
	{
	EVP_MD *digest;
	int r = 0;

	if ((digest = EVP_MD_fetch(NULL, SN_sha1, NULL)) != NULL)
	r = ossl_pkcs5_pbkdf2_hmac_ex(pass, passlen, salt, saltlen, iter,
	digest, keylen, out, NULL, NULL);
	EVP_MD_free(digest);
	return r;
	}

	/*
	* Now the key derivation function itself. This is a bit evil because it has
	* to check the ASN1 parameters are valid: and there are quite a few of
	* them...
	*/

	int PKCS5_v2_PBE_keyivgen_ex(EVP_CIPHER_CTX ctx, const char pass, int passlen,
	ASN1_TYPE param, const EVP_CIPHER c,
	const EVP_MD *md, int en_de,
	OSSL_LIB_CTX libctx, const char propq)
	{
	PBE2PARAM *pbe2 = NULL;
	char ciph_name[80];
	const EVP_CIPHER *cipher = NULL;
	EVP_CIPHER *cipher_fetch = NULL;
	EVP_PBE_KEYGEN_EX *kdf;

	int rv = 0;

	pbe2 = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBE2PARAM), param);
	if (pbe2 == NULL) {
	ERR_raise(ERR_LIB_EVP, EVP_R_DECODE_ERROR);
	goto err;
	}

	/* See if we recognise the key derivation function */
	if (!EVP_PBE_find_ex(EVP_PBE_TYPE_KDF, OBJ_obj2nid(pbe2->keyfunc->algorithm),
	NULL, NULL, NULL, &kdf)) {
	ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_KEY_DERIVATION_FUNCTION);
	goto err;
	}

	/*
	* lets see if we recognise the encryption algorithm.
	*/
	if (OBJ_obj2txt(ciph_name, sizeof(ciph_name), pbe2->encryption->algorithm, 0) <= 0) {
	ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_CIPHER);
	goto err;
	}

	(void)ERR_set_mark();
	cipher = cipher_fetch = EVP_CIPHER_fetch(libctx, ciph_name, propq);
	/* Fallback to legacy method */
	if (cipher == NULL)
	cipher = EVP_get_cipherbyname(ciph_name);

	if (cipher == NULL) {
	(void)ERR_clear_last_mark();
	ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_CIPHER);
	goto err;
	}
	(void)ERR_pop_to_mark();

	/* Fixup cipher based on AlgorithmIdentifier */
	if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, en_de))
	goto err;
	if (EVP_CIPHER_asn1_to_param(ctx, pbe2->encryption->parameter) < 0) {
	ERR_raise(ERR_LIB_EVP, EVP_R_CIPHER_PARAMETER_ERROR);
	goto err;
	}
	rv = kdf(ctx, pass, passlen, pbe2->keyfunc->parameter, NULL, NULL, en_de, libctx, propq);
	err:
	EVP_CIPHER_free(cipher_fetch);
	PBE2PARAM_free(pbe2);
	return rv;
	}

	int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX ctx, const char pass, int passlen,
	ASN1_TYPE param, const EVP_CIPHER c,
	const EVP_MD *md, int en_de)
	{
	return PKCS5_v2_PBE_keyivgen_ex(ctx, pass, passlen, param, c, md, en_de, NULL, NULL);
	}

	int PKCS5_v2_PBKDF2_keyivgen_ex(EVP_CIPHER_CTX ctx, const char pass,
	int passlen, ASN1_TYPE *param,
	const EVP_CIPHER c, const EVP_MD md, int en_de,
	OSSL_LIB_CTX libctx, const char propq)
	{
	unsigned char *salt, key[EVP_MAX_KEY_LENGTH];
	int saltlen, iter, t;
	int rv = 0;
	unsigned int keylen = 0;
	int prf_nid, hmac_md_nid;
	PBKDF2PARAM *kdf = NULL;
	const EVP_MD *prfmd = NULL;
	EVP_MD *prfmd_fetch = NULL;

	if (EVP_CIPHER_CTX_get0_cipher(ctx) == NULL) {
	ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
	goto err;
	}
	keylen = EVP_CIPHER_CTX_get_key_length(ctx);
	OPENSSL_assert(keylen <= sizeof(key));

	/* Decode parameter */

	kdf = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBKDF2PARAM), param);

	if (kdf == NULL) {
	ERR_raise(ERR_LIB_EVP, EVP_R_DECODE_ERROR);
	goto err;
	}

	t = EVP_CIPHER_CTX_get_key_length(ctx);
	if (t < 0) {
	ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
	goto err;
	}
	keylen = t;

	/* Now check the parameters of the kdf */

	if (kdf->keylength && (ASN1_INTEGER_get(kdf->keylength) != (int)keylen)) {
	ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_KEYLENGTH);
	goto err;
	}

	if (kdf->prf)
	prf_nid = OBJ_obj2nid(kdf->prf->algorithm);
	else
	prf_nid = NID_hmacWithSHA1;

	if (!EVP_PBE_find(EVP_PBE_TYPE_PRF, prf_nid, NULL, &hmac_md_nid, 0)) {
	ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_PRF);
	goto err;
	}

	prfmd = prfmd_fetch = EVP_MD_fetch(libctx, OBJ_nid2sn(hmac_md_nid), propq);
	if (prfmd == NULL)
	prfmd = EVP_get_digestbynid(hmac_md_nid);
	if (prfmd == NULL) {
	ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_PRF);
	goto err;
	}

	if (kdf->salt->type != V_ASN1_OCTET_STRING) {
	ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_SALT_TYPE);
	goto err;
	}

	/* it seems that its all OK */
	salt = kdf->salt->value.octet_string->data;
	saltlen = kdf->salt->value.octet_string->length;
	iter = ASN1_INTEGER_get(kdf->iter);
	if (!ossl_pkcs5_pbkdf2_hmac_ex(pass, passlen, salt, saltlen, iter, prfmd,
	keylen, key, libctx, propq))
	goto err;
	rv = EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de);
	err:
	OPENSSL_cleanse(key, keylen);
	PBKDF2PARAM_free(kdf);
	EVP_MD_free(prfmd_fetch);
	return rv;
	}

	int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX ctx, const char pass,
	int passlen, ASN1_TYPE *param,
	const EVP_CIPHER c, const EVP_MD md, int en_de)
	{
	return PKCS5_v2_PBKDF2_keyivgen_ex(ctx, pass, passlen, param, c, md, en_de,
	NULL, NULL);
	}