/* p12_key.c */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 1999.
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 1999.
*/
/* ====================================================================
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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
*/
#include <stdio.h>
-#include "cryptlib.h"
-#include "pkcs12.h"
-
+#include "internal/cryptlib.h"
+#include <openssl/pkcs12.h>
+#include <openssl/bn.h>
/* Uncomment out this line to get debugging info about key generation */
-/*#define DEBUG_KEYGEN*/
+/*
+ * #define DEBUG_KEYGEN
+ */
#ifdef DEBUG_KEYGEN
-#include <bio.h>
+# include <openssl/bio.h>
extern BIO *bio_err;
-void h__dump (unsigned char *p, int len);
+void h__dump(unsigned char *p, int len);
#endif
/* PKCS12 compatible key/IV generation */
#ifndef min
-#define min(a,b) ((a) < (b) ? (a) : (b))
+# define min(a,b) ((a) < (b) ? (a) : (b))
#endif
-int PKCS12_key_gen_asc (pass, passlen, salt, saltlen, id, iter, n, out, md_type)
-unsigned char *pass, *salt, *out;
-int passlen, saltlen, id, iter, n;
-EVP_MD *md_type;
+int PKCS12_key_gen_asc(const char *pass, int passlen, unsigned char *salt,
+ int saltlen, int id, int iter, int n,
+ unsigned char *out, const EVP_MD *md_type)
{
- int ret;
- unsigned char *unipass;
- int uniplen;
- if (!asc2uni (pass, &unipass, &uniplen)) {
- PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- ret = PKCS12_key_gen_uni (unipass, uniplen, salt, saltlen,
- id, iter, n, out, md_type);
- memset(unipass, 0, uniplen); /* Clear password from memory */
- Free(unipass);
- return ret;
+ int ret;
+ unsigned char *unipass;
+ int uniplen;
+
+ if (!pass) {
+ unipass = NULL;
+ uniplen = 0;
+ } else if (!OPENSSL_asc2uni(pass, passlen, &unipass, &uniplen)) {
+ PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen,
+ id, iter, n, out, md_type);
+ if (ret <= 0)
+ return 0;
+ OPENSSL_clear_free(unipass, uniplen);
+ return ret;
}
-int PKCS12_key_gen_uni (pass, passlen, salt, saltlen, id, iter, n, out, md_type)
-unsigned char *pass, *salt, *out;
-int passlen, saltlen, id, iter, n;
-EVP_MD *md_type;
+int PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt,
+ int saltlen, int id, int iter, int n,
+ unsigned char *out, const EVP_MD *md_type)
{
- unsigned char *B, *D, *I, *p, *Ai;
- int Slen, Plen, Ilen;
- int i, j, u, v;
- BIGNUM *Ij, *Bpl1; /* These hold Ij and B + 1 */
- EVP_MD_CTX ctx;
+ unsigned char *B = NULL, *D = NULL, *I = NULL, *p = NULL, *Ai = NULL;
+ int Slen, Plen, Ilen, Ijlen;
+ int i, j, u, v;
+ int ret = 0;
+ BIGNUM *Ij = NULL, *Bpl1 = NULL; /* These hold Ij and B + 1 */
+ EVP_MD_CTX *ctx = NULL;
#ifdef DEBUG_KEYGEN
- unsigned char *tmpout = out;
- int tmpn = n;
- BIO_printf (bio_err, "KEYGEN DEBUG\n");
- BIO_printf (bio_err, "ID %d, ITER %d\n", id, iter);
- BIO_printf (bio_err, "Password (length %d):\n", passlen);
- h__dump (pass, passlen);
- BIO_printf (bio_err, "Salt (length %d):\n", saltlen);
- h__dump (salt, saltlen);
- BIO_printf (bio_err, "ID %d, ITER %d\n\n", id, iter);
+ unsigned char *tmpout = out;
+ int tmpn = n;
#endif
- v = EVP_MD_block_size (md_type);
- u = EVP_MD_size (md_type);
- D = Malloc (v);
- Ai = Malloc (u);
- B = Malloc (v + 1);
- Slen = v * ((saltlen+v-1)/v);
- Plen = v * ((passlen+v-1)/v);
- Ilen = Slen + Plen;
- I = Malloc (Ilen);
- Ij = BN_new();
- Bpl1 = BN_new();
- if (!D || !Ai || !B || !I || !Ij || !Bpl1) {
- PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- for (i = 0; i < v; i++) D[i] = id;
- p = I;
- for (i = 0; i < Slen; i++) *p++ = salt[i % saltlen];
- for (i = 0; i < Plen; i++) *p++ = pass[i % passlen];
- for (;;) {
- EVP_DigestInit (&ctx, md_type);
- EVP_DigestUpdate (&ctx, D, v);
- EVP_DigestUpdate (&ctx, I, Ilen);
- EVP_DigestFinal (&ctx, Ai, NULL);
- for (j = 1; j < iter; j++) {
- EVP_DigestInit (&ctx, md_type);
- EVP_DigestUpdate (&ctx, Ai, u);
- EVP_DigestFinal (&ctx, Ai, NULL);
- }
- memcpy (out, Ai, min (n, u));
- if (u >= n) {
- Free (Ai);
- Free (B);
- Free (D);
- Free (I);
- BN_free (Ij);
- BN_free (Bpl1);
+
+ ctx = EVP_MD_CTX_new();
+ if (ctx == NULL)
+ goto err;
+
+#ifdef DEBUG_KEYGEN
+ fprintf(stderr, "KEYGEN DEBUG\n");
+ fprintf(stderr, "ID %d, ITER %d\n", id, iter);
+ fprintf(stderr, "Password (length %d):\n", passlen);
+ h__dump(pass, passlen);
+ fprintf(stderr, "Salt (length %d):\n", saltlen);
+ h__dump(salt, saltlen);
+#endif
+ v = EVP_MD_block_size(md_type);
+ u = EVP_MD_size(md_type);
+ if (u < 0)
+ return 0;
+ D = OPENSSL_malloc(v);
+ Ai = OPENSSL_malloc(u);
+ B = OPENSSL_malloc(v + 1);
+ Slen = v * ((saltlen + v - 1) / v);
+ if (passlen)
+ Plen = v * ((passlen + v - 1) / v);
+ else
+ Plen = 0;
+ Ilen = Slen + Plen;
+ I = OPENSSL_malloc(Ilen);
+ Ij = BN_new();
+ Bpl1 = BN_new();
+ if (D == NULL || Ai == NULL || B == NULL || I == NULL || Ij == NULL
+ || Bpl1 == NULL)
+ goto err;
+ for (i = 0; i < v; i++)
+ D[i] = id;
+ p = I;
+ for (i = 0; i < Slen; i++)
+ *p++ = salt[i % saltlen];
+ for (i = 0; i < Plen; i++)
+ *p++ = pass[i % passlen];
+ 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 < iter; 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, min(n, u));
+ if (u >= n) {
#ifdef DEBUG_KEYGEN
- BIO_printf (bio_err, "Output KEY (length %d)\n", tmpn);
- h__dump (tmpout, tmpn);
+ fprintf(stderr, "Output KEY (length %d)\n", tmpn);
+ h__dump(tmpout, tmpn);
+#endif
+ ret = 1;
+ goto end;
+ }
+ n -= 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);
+#ifndef PKCS12_BROKEN_KEYGEN
+ /* 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;
#endif
- return 1;
- }
- n -= 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 */
- BN_bin2bn (B, v, Bpl1);
- BN_add_word (Bpl1, 1);
- for (j = 0; j < Ilen ; j+=v) {
- BN_bin2bn (I + j, v, Ij);
- BN_add (Ij, Ij, Bpl1);
- BN_bn2bin (Ij, B);
- /* If more than 2^(v*8) - 1 cut off MSB */
- if (BN_num_bytes (Ij) > v) {
- BN_bn2bin (Ij, B);
- memcpy (I + j, B + 1, v);
- } else BN_bn2bin (Ij, I + j);
- }
- }
- return 0; /* This can't happen */
+ } else if (!BN_bn2bin(Ij, I + j))
+ goto err;
+ }
+ }
+
+ err:
+ PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI, 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_free(ctx);
+ return ret;
}
+
#ifdef DEBUG_KEYGEN
-void h__dump (p, len)
-unsigned char *p;
-int len;
+void h__dump(unsigned char *p, int len)
{
- for (; len --; p++) BIO_printf (bio_err, "%02X", *p);
- BIO_printf (bio_err, "\n");
+ for (; len--; p++)
+ fprintf(stderr, "%02X", *p);
+ fprintf(stderr, "\n");
}
#endif
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