Change default RSA, DSA and DH size to 2048 bit

Fixes: #8737

Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Reviewed-by: Richard Levitte <levitte@openssl.org>
GH: #8741
(cherry picked from commit 70b0b977f73cd70e17538af3095d18e0cf59132e)

5 files changed, 16 insertions, 10 deletions

diff --git a/CHANGES b/CHANGES
index 78c7b596b0..38864c1ca2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -9,6 +9,12 @@
 
  Changes between 1.0.2r and 1.0.2s [xx XXX xxxx]
 
+  *) Change the default RSA, DSA and DH size to 2048 bit instead of 1024.
+     This changes the size when using the genpkey app when no size is given. It
+     fixes an omission in earlier changes that changed all RSA, DSA and DH
+     generation apps to use 2048 bits by default.
+     [Kurt Roeckx]
+
   *) Add FIPS support for Android Arm 64-bit
 
      Support for Android Arm 64-bit was added to the OpenSSL FIPS Object Module in
diff --git a/crypto/dh/dh_pmeth.c b/crypto/dh/dh_pmeth.c
index 162753af07..30777c8a5f 100644
--- a/crypto/dh/dh_pmeth.c
+++ b/crypto/dh/dh_pmeth.c
@@ -101,7 +101,7 @@ static int pkey_dh_init(EVP_PKEY_CTX *ctx)
     dctx = OPENSSL_malloc(sizeof(DH_PKEY_CTX));
     if (!dctx)
         return 0;
-    dctx->prime_len = 1024;
+    dctx->prime_len = 2048;
     dctx->subprime_len = -1;
     dctx->generator = 2;
     dctx->use_dsa = 0;
diff --git a/crypto/dsa/dsa_pmeth.c b/crypto/dsa/dsa_pmeth.c
index 7f00e97036..51e382d552 100644
--- a/crypto/dsa/dsa_pmeth.c
+++ b/crypto/dsa/dsa_pmeth.c
@@ -69,8 +69,8 @@
 
 typedef struct {
     /* Parameter gen parameters */
-    int nbits;                  /* size of p in bits (default: 1024) */
-    int qbits;                  /* size of q in bits (default: 160) */
+    int nbits;                  /* size of p in bits (default: 2048) */
+    int qbits;                  /* size of q in bits (default: 224) */
     const EVP_MD *pmd;          /* MD for parameter generation */
     /* Keygen callback info */
     int gentmp[2];
@@ -84,8 +84,8 @@ static int pkey_dsa_init(EVP_PKEY_CTX *ctx)
     dctx = OPENSSL_malloc(sizeof(DSA_PKEY_CTX));
     if (!dctx)
         return 0;
-    dctx->nbits = 1024;
-    dctx->qbits = 160;
+    dctx->nbits = 2048;
+    dctx->qbits = 224;
     dctx->pmd = NULL;
     dctx->md = NULL;
 
diff --git a/crypto/rsa/rsa_pmeth.c b/crypto/rsa/rsa_pmeth.c
index 00e730ffa9..b0a51ee532 100644
--- a/crypto/rsa/rsa_pmeth.c
+++ b/crypto/rsa/rsa_pmeth.c
@@ -103,7 +103,7 @@ static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
     rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
     if (!rctx)
         return 0;
-    rctx->nbits = 1024;
+    rctx->nbits = 2048;
     rctx->pub_exp = NULL;
     rctx->pad_mode = RSA_PKCS1_PADDING;
     rctx->md = NULL;
diff --git a/doc/apps/genpkey.pod b/doc/apps/genpkey.pod
index 2e2440056f..2a86c680c5 100644
--- a/doc/apps/genpkey.pod
+++ b/doc/apps/genpkey.pod
@@ -111,7 +111,7 @@ below.
 
 =item B<rsa_keygen_bits:numbits>
 
-The number of bits in the generated key. If not specified 1024 is used.
+The number of bits in the generated key. If not specified 2048 is used.
 
 =item B<rsa_keygen_pubexp:value>
 
@@ -149,12 +149,12 @@ below.
 
 =item B<dsa_paramgen_bits:numbits>
 
-The number of bits in the generated prime. If not specified 1024 is used.
+The number of bits in the generated prime. If not specified 2048 is used.
 
 =item B<dsa_paramgen_q_bits:numbits>
 
 The number of bits in the q parameter. Must be one of 160, 224 or 256. If not
-specified 160 is used.
+specified 224 is used.
 
 =item B<dsa_paramgen_md:digest>
 
@@ -173,7 +173,7 @@ or B<sha256> if it is 256.
 
 =item B<dh_paramgen_prime_len:numbits>
 
-The number of bits in the prime parameter B<p>. The default is 1024.
+The number of bits in the prime parameter B<p>. The default is 2048.
 
 =item B<dh_paramgen_subprime_len:numbits>