misc/dmg2img: Patch for openssl-1.1.x.

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>

2 files changed, 222 insertions, 0 deletions

diff --git a/misc/dmg2img/0001-openssl-1.1-compatibility.patch b/misc/dmg2img/0001-openssl-1.1-compatibility.patch
new file mode 100644
index 000000000000..b5ed45d2ff30
--- /dev/null
+++ b/misc/dmg2img/0001-openssl-1.1-compatibility.patch
@@ -0,0 +1,219 @@
+From f16f247d30f868e84f31e24792b4464488f1c009 Mon Sep 17 00:00:00 2001
+From: Peter Wu <peter@lekensteyn.nl>
+Date: Tue, 2 May 2017 15:53:38 +0200
+Subject: [PATCH] vfdecrypt: OpenSSL 1.1 compatibility
+
+Allocate contexts from the heap on all OpenSSL versions, this is needed
+since OpenSSL 1.1.0. No attempt is done at addressing issues like global
+variables and fixing potential memleaks on error paths.
+
+Compile-tested only with OpenSSL 1.1.0e (Arch Linux) and OpenSSL 1.0.2g
+(Ubuntu 16.04), I have no test file.
+
+Fixes https://github.com/Lekensteyn/dmg2img/issues/4
+---
+ vfdecrypt.c | 103 ++++++++++++++++++++++++++++++++++++++++++++++--------------
+ 1 file changed, 80 insertions(+), 23 deletions(-)
+
+diff --git a/vfdecrypt.c b/vfdecrypt.c
+index 56d3530..b1a36d3 100644
+--- a/vfdecrypt.c
++++ b/vfdecrypt.c
+@@ -183,7 +183,7 @@ void adjust_v2_header_byteorder(cencrypted_v2_pwheader *pwhdr) {
+   pwhdr->encrypted_keyblob_size = htonl(pwhdr->encrypted_keyblob_size);
+ }
+
+-HMAC_CTX hmacsha1_ctx;
++HMAC_CTX *hmacsha1_ctx;
+ AES_KEY aes_decrypt_key;
+ int CHUNK_SIZE=4096;  // default
+
+@@ -196,9 +196,9 @@ void compute_iv(uint32_t chunk_no, uint8_t *iv) {
+   unsigned int mdLen;
+
+   chunk_no = OSSwapHostToBigInt32(chunk_no);
+-  HMAC_Init_ex(&hmacsha1_ctx, NULL, 0, NULL, NULL);
+-  HMAC_Update(&hmacsha1_ctx, (void *) &chunk_no, sizeof(uint32_t));
+-  HMAC_Final(&hmacsha1_ctx, mdResult, &mdLen);
++  HMAC_Init_ex(hmacsha1_ctx, NULL, 0, NULL, NULL);
++  HMAC_Update(hmacsha1_ctx, (void *) &chunk_no, sizeof(uint32_t));
++  HMAC_Final(hmacsha1_ctx, mdResult, &mdLen);
+   memcpy(iv, mdResult, CIPHER_BLOCKSIZE);
+ }
+
+@@ -212,52 +212,75 @@ void decrypt_chunk(uint8_t *ctext, uint8_t *ptext, uint32_t chunk_no) {
+ /* DES3-EDE unwrap operation loosely based on to RFC 2630, section 12.6
+  *    wrapped_key has to be 40 bytes in length.  */
+ int apple_des3_ede_unwrap_key(uint8_t *wrapped_key, int wrapped_key_len, uint8_t *decryptKey, uint8_t *unwrapped_key) {
+-  EVP_CIPHER_CTX ctx;
++  EVP_CIPHER_CTX *ctx;
+   uint8_t *TEMP1, *TEMP2, *CEKICV;
+   uint8_t IV[8] = { 0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05 };
+   int outlen, tmplen, i;
+
+-  EVP_CIPHER_CTX_init(&ctx);
++#if OPENSSL_VERSION_NUMBER >= 0x10100000L
++  ctx = EVP_CIPHER_CTX_new();
++#else
++  ctx = malloc(sizeof(*ctx));
++#endif
++  if (!ctx) {
++    fprintf(stderr, "Out of memory: EVP_CIPHER_CTX!\n");
++    return(-1);
++  }
++
++  EVP_CIPHER_CTX_init(ctx);
+   /* result of the decryption operation shouldn't be bigger than ciphertext */
+   TEMP1 = malloc(wrapped_key_len);
+   TEMP2 = malloc(wrapped_key_len);
+   CEKICV = malloc(wrapped_key_len);
+   /* uses PKCS#7 padding for symmetric key operations by default */
+-  EVP_DecryptInit_ex(&ctx, EVP_des_ede3_cbc(), NULL, decryptKey, IV);
++  EVP_DecryptInit_ex(ctx, EVP_des_ede3_cbc(), NULL, decryptKey, IV);
+
+-  if(!EVP_DecryptUpdate(&ctx, TEMP1, &outlen, wrapped_key, wrapped_key_len)) {
++  if(!EVP_DecryptUpdate(ctx, TEMP1, &outlen, wrapped_key, wrapped_key_len)) {
+     fprintf(stderr, "internal error (1) during key unwrap operation!\n");
+     return(-1);
+   }
+-  if(!EVP_DecryptFinal_ex(&ctx, TEMP1 + outlen, &tmplen)) {
++  if(!EVP_DecryptFinal_ex(ctx, TEMP1 + outlen, &tmplen)) {
+     fprintf(stderr, "internal error (2) during key unwrap operation!\n");
+     return(-1);
+   }
+   outlen += tmplen;
+-  EVP_CIPHER_CTX_cleanup(&ctx);
++#if OPENSSL_VERSION_NUMBER >= 0x10100000L
++  EVP_CIPHER_CTX_reset(ctx);
++#else
++  EVP_CIPHER_CTX_cleanup(ctx);
++#endif
+
+   /* reverse order of TEMP3 */
+   for(i = 0; i < outlen; i++) TEMP2[i] = TEMP1[outlen - i - 1];
+
+-  EVP_CIPHER_CTX_init(&ctx);
++  EVP_CIPHER_CTX_init(ctx);
+   /* uses PKCS#7 padding for symmetric key operations by default */
+-  EVP_DecryptInit_ex(&ctx, EVP_des_ede3_cbc(), NULL, decryptKey, TEMP2);
+-  if(!EVP_DecryptUpdate(&ctx, CEKICV, &outlen, TEMP2+8, outlen-8)) {
++  EVP_DecryptInit_ex(ctx, EVP_des_ede3_cbc(), NULL, decryptKey, TEMP2);
++  if(!EVP_DecryptUpdate(ctx, CEKICV, &outlen, TEMP2+8, outlen-8)) {
+     fprintf(stderr, "internal error (3) during key unwrap operation!\n");
+     return(-1);
+   }
+-  if(!EVP_DecryptFinal_ex(&ctx, CEKICV + outlen, &tmplen)) {
++  if(!EVP_DecryptFinal_ex(ctx, CEKICV + outlen, &tmplen)) {
+     fprintf(stderr, "internal error (4) during key unwrap operation!\n");
+     return(-1);
+   }
+
+   outlen += tmplen;
+-  EVP_CIPHER_CTX_cleanup(&ctx);
++#if OPENSSL_VERSION_NUMBER >= 0x10100000L
++  EVP_CIPHER_CTX_reset(ctx);
++#else
++  EVP_CIPHER_CTX_cleanup(ctx);
++#endif
+
+   memcpy(unwrapped_key, CEKICV+4, outlen-4);
+   free(TEMP1);
+   free(TEMP2);
+   free(CEKICV);
++#if OPENSSL_VERSION_NUMBER >= 0x10100000L
++  EVP_CIPHER_CTX_free(ctx);
++#else
++  free(ctx);
++#endif
+   return(0);
+ }
+
+@@ -279,31 +302,46 @@ int unwrap_v1_header(char *passphrase, cencrypted_v1_header *header, uint8_t *ae
+ int unwrap_v2_header(char *passphrase, cencrypted_v2_pwheader *header, uint8_t *aes_key, uint8_t *hmacsha1_key) {
+   /* derived key is a 3DES-EDE key */
+   uint8_t derived_key[192/8];
+-  EVP_CIPHER_CTX ctx;
++  EVP_CIPHER_CTX *ctx;
+   uint8_t *TEMP1;
+   int outlen, tmplen;
+
++#if OPENSSL_VERSION_NUMBER >= 0x10100000L
++  ctx = EVP_CIPHER_CTX_new();
++#else
++  ctx = malloc(sizeof(*ctx));
++#endif
++  if (!ctx) {
++    fprintf(stderr, "Out of memory: EVP_CIPHER_CTX!\n");
++    return(-1);
++  }
++
+   PKCS5_PBKDF2_HMAC_SHA1(passphrase, strlen(passphrase), (unsigned char*)header->kdf_salt, 20,
+ 			 PBKDF2_ITERATION_COUNT, sizeof(derived_key), derived_key);
+
+   print_hex(derived_key, 192/8);
+
+-  EVP_CIPHER_CTX_init(&ctx);
++  EVP_CIPHER_CTX_init(ctx);
+   /* result of the decryption operation shouldn't be bigger than ciphertext */
+   TEMP1 = malloc(header->encrypted_keyblob_size);
+   /* uses PKCS#7 padding for symmetric key operations by default */
+-  EVP_DecryptInit_ex(&ctx, EVP_des_ede3_cbc(), NULL, derived_key, header->blob_enc_iv);
++  EVP_DecryptInit_ex(ctx, EVP_des_ede3_cbc(), NULL, derived_key, header->blob_enc_iv);
+
+-  if(!EVP_DecryptUpdate(&ctx, TEMP1, &outlen, header->encrypted_keyblob, header->encrypted_keyblob_size)) {
++  if(!EVP_DecryptUpdate(ctx, TEMP1, &outlen, header->encrypted_keyblob, header->encrypted_keyblob_size)) {
+     fprintf(stderr, "internal error (1) during key unwrap operation!\n");
+     return(-1);
+   }
+-  if(!EVP_DecryptFinal_ex(&ctx, TEMP1 + outlen, &tmplen)) {
++  if(!EVP_DecryptFinal_ex(ctx, TEMP1 + outlen, &tmplen)) {
+     fprintf(stderr, "internal error (2) during key unwrap operation!\n");
+     return(-1);
+   }
+   outlen += tmplen;
+-  EVP_CIPHER_CTX_cleanup(&ctx);
++#if OPENSSL_VERSION_NUMBER >= 0x10100000L
++  EVP_CIPHER_CTX_free(ctx);
++#else
++  EVP_CIPHER_CTX_cleanup(ctx);
++  free(ctx);
++#endif
+   memcpy(aes_key, TEMP1, 16);
+   memcpy(hmacsha1_key, TEMP1, 20);
+
+@@ -446,8 +484,21 @@ int main(int argc, char *argv[]) {
+     CHUNK_SIZE = v2header.blocksize;
+   }
+
+-  HMAC_CTX_init(&hmacsha1_ctx);
+-  HMAC_Init_ex(&hmacsha1_ctx, hmacsha1_key, sizeof(hmacsha1_key), EVP_sha1(), NULL);
++#if OPENSSL_VERSION_NUMBER >= 0x10100000L
++  hmacsha1_ctx = HMAC_CTX_new();
++#else
++  hmacsha1_ctx = malloc(sizeof(*hmacsha1_ctx));
++#endif
++  if (!hmacsha1_ctx) {
++    fprintf(stderr, "Out of memory: HMAC CTX!\n");
++    exit(1);
++  }
++#if OPENSSL_VERSION_NUMBER >= 0x10100000L
++  HMAC_CTX_reset(hmacsha1_ctx);
++#else
++  HMAC_CTX_init(hmacsha1_ctx);
++#endif
++  HMAC_Init_ex(hmacsha1_ctx, hmacsha1_key, sizeof(hmacsha1_key), EVP_sha1(), NULL);
+   AES_set_decrypt_key(aes_key, CIPHER_KEY_LENGTH * 8, &aes_decrypt_key);
+
+   if (verbose >= 1) {
+@@ -472,5 +523,11 @@ int main(int argc, char *argv[]) {
+   }
+
+   if (verbose)  fprintf(stderr, "%"PRIX32" chunks written\n", chunk_no);
++#if OPENSSL_VERSION_NUMBER >= 0x10100000L
++  HMAC_CTX_free(hmacsha1_ctx);
++#else
++  HMAC_CTX_cleanup(hmacsha1_ctx);
++  free(hmacsha1_ctx);
++#endif
+   return(0);
+ }
diff --git a/misc/dmg2img/dmg2img.SlackBuild b/misc/dmg2img/dmg2img.SlackBuild
index 941b7bae53a5..468aa42a5146 100644
--- a/misc/dmg2img/dmg2img.SlackBuild
+++ b/misc/dmg2img/dmg2img.SlackBuild
@@ -71,6 +71,9 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+# Thanks Archlinux!
+patch -lp1 < $CWD/0001-openssl-1.1-compatibility.patch
+
 make CFLAGS="$SLKCFLAGS"
 make install DESTDIR=$PKG