In cases where we ask PEM_def_callback for minimum 0 length, accept 0 length

Fixes #4716

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6173)

diff --git a/CHANGES b/CHANGES
index e8b92ccc0267a5cd4a5d72d69ce9213b02d98992..c67a9c61ec0a4f3d71fa20a801101f38febde8b1 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -9,6 +9,10 @@
 
  Changes between 1.1.0h and 1.1.1 [xx XXX xxxx]
 
+  *) When unlocking a pass phrase protected PEM file or PKCS#8 container, we
+     now allow empty (zero character) pass phrases.
+     [Richard Levitte]
+
   *) Apply blinding to binary field modular inversion and remove patent
      pending (OPENSSL_SUN_GF2M_DIV) BN_GF2m_mod_div implementation.
      [Billy Bob Brumley]

diff --git a/crypto/pem/pem_lib.c b/crypto/pem/pem_lib.c
index 5000f268b9be580046ebb9a3cc437ce289af45b1..7c82561ba40ee53031aab3af03325a904675e1fc 100644 (file)
--- a/crypto/pem/pem_lib.c
+++ b/crypto/pem/pem_lib.c
@@ -430,7 +430,7 @@ int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
         keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
     else
         keylen = callback(buf, PEM_BUFSIZE, 0, u);
-    if (keylen <= 0) {
+    if (keylen < 0) {
         PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
         return 0;
     }

diff --git a/crypto/pem/pem_pk8.c b/crypto/pem/pem_pk8.c
index e2c0f3de1d226c88050f0c14d39b00b83ab8e03b..ebc7fadc5733db627069811c247cd629ed5192e2 100644 (file)
--- a/crypto/pem/pem_pk8.c
+++ b/crypto/pem/pem_pk8.c
@@ -124,7 +124,7 @@ EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
         klen = cb(psbuf, PEM_BUFSIZE, 0, u);
     else
         klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
-    if (klen <= 0) {
+    if (klen < 0) {
         PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);
         X509_SIG_free(p8);
         return NULL;

diff --git a/crypto/pem/pem_pkey.c b/crypto/pem/pem_pkey.c
index 8730a78913ec1a0f2f742c58e1fcff4fbee592fd..aa032d2b1cac2822738b2f54e60e4ea79d0407f9 100644 (file)
--- a/crypto/pem/pem_pkey.c
+++ b/crypto/pem/pem_pkey.c
@@ -60,7 +60,7 @@ EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
             klen = cb(psbuf, PEM_BUFSIZE, 0, u);
         else
             klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
-        if (klen <= 0) {
+        if (klen < 0) {
             PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, PEM_R_BAD_PASSWORD_READ);
             X509_SIG_free(p8);
             goto err;

diff --git a/crypto/pem/pvkfmt.c b/crypto/pem/pvkfmt.c
index 72ae5ab2573b5923803d58d469b75eb9d990aa39..281c6cd95a154c171f3bdaf17a450b767ed8465d 100644 (file)
--- a/crypto/pem/pvkfmt.c
+++ b/crypto/pem/pvkfmt.c
@@ -686,7 +686,7 @@ static EVP_PKEY *do_PVK_body(const unsigned char **in,
             inlen = cb(psbuf, PEM_BUFSIZE, 0, u);
         else
             inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
-        if (inlen <= 0) {
+        if (inlen < 0) {
             PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_PASSWORD_READ);
             goto err;
         }