Move DSA_sign, DSA_verify to dsa_asn1.c and include separate versions of

DSA_SIG_new() and DSA_SIG_free() to remove ASN1 dependencies from DSA_do_sign()
and DSA_do_verify().

3 files changed, 62 insertions, 37 deletions

diff --git a/crypto/dsa/dsa_asn1.c b/crypto/dsa/dsa_asn1.c
index c37460b2d6..6058534374 100644
--- a/crypto/dsa/dsa_asn1.c
+++ b/crypto/dsa/dsa_asn1.c
@@ -61,6 +61,7 @@
 #include <openssl/dsa.h>
 #include <openssl/asn1.h>
 #include <openssl/asn1t.h>
+#include <openssl/rand.h>
 
 /* Override the default new methods */
 static int sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
@@ -87,7 +88,7 @@ ASN1_SEQUENCE_cb(DSA_SIG, sig_cb) = {
 	ASN1_SIMPLE(DSA_SIG, s, CBIGNUM)
 } ASN1_SEQUENCE_END_cb(DSA_SIG, DSA_SIG)
 
-IMPLEMENT_ASN1_FUNCTIONS_const(DSA_SIG)
+IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA_SIG, DSA_SIG, DSA_SIG)
 
 /* Override the default free and new methods */
 static int dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
@@ -148,3 +149,40 @@ DSA *DSAparams_dup(DSA *dsa)
 	{
 	return ASN1_item_dup(ASN1_ITEM_rptr(DSAparams), dsa);
 	}
+
+int DSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char *sig,
+	     unsigned int *siglen, DSA *dsa)
+	{
+	DSA_SIG *s;
+	RAND_seed(dgst, dlen);
+	s=DSA_do_sign(dgst,dlen,dsa);
+	if (s == NULL)
+		{
+		*siglen=0;
+		return(0);
+		}
+	*siglen=i2d_DSA_SIG(s,&sig);
+	DSA_SIG_free(s);
+	return(1);
+	}
+
+/* data has already been hashed (probably with SHA or SHA-1). */
+/* returns
+ *      1: correct signature
+ *      0: incorrect signature
+ *     -1: error
+ */
+int DSA_verify(int type, const unsigned char *dgst, int dgst_len,
+	     const unsigned char *sigbuf, int siglen, DSA *dsa)
+	{
+	DSA_SIG *s;
+	int ret=-1;
+
+	s = DSA_SIG_new();
+	if (s == NULL) return(ret);
+	if (d2i_DSA_SIG(&s,&sigbuf,siglen) == NULL) goto err;
+	ret=DSA_do_verify(dgst,dgst_len,s,dsa);
+err:
+	DSA_SIG_free(s);
+	return(ret);
+	}
diff --git a/crypto/dsa/dsa_sign.c b/crypto/dsa/dsa_sign.c
index 17555e5892..e02365a8b1 100644
--- a/crypto/dsa/dsa_sign.c
+++ b/crypto/dsa/dsa_sign.c
@@ -61,30 +61,38 @@
 #include "cryptlib.h"
 #include <openssl/dsa.h>
 #include <openssl/rand.h>
+#include <openssl/bn.h>
 
 DSA_SIG * DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
 	{
 	return dsa->meth->dsa_do_sign(dgst, dlen, dsa);
 	}
 
-int DSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char *sig,
-	     unsigned int *siglen, DSA *dsa)
+int DSA_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
 	{
-	DSA_SIG *s;
-	RAND_seed(dgst, dlen);
-	s=DSA_do_sign(dgst,dlen,dsa);
-	if (s == NULL)
-		{
-		*siglen=0;
-		return(0);
-		}
-	*siglen=i2d_DSA_SIG(s,&sig);
-	DSA_SIG_free(s);
-	return(1);
+	return dsa->meth->dsa_sign_setup(dsa, ctx_in, kinvp, rp);
 	}
 
-int DSA_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
+DSA_SIG *DSA_SIG_new(void)
 	{
-	return dsa->meth->dsa_sign_setup(dsa, ctx_in, kinvp, rp);
+	DSA_SIG *sig;
+	sig = OPENSSL_malloc(sizeof(DSA_SIG));
+	if (!sig)
+		return NULL;
+	sig->r = NULL;
+	sig->s = NULL;
+	return sig;
+	}
+
+void DSA_SIG_free(DSA_SIG *sig)
+	{
+	if (sig)
+		{
+		if (sig->r)
+			BN_free(sig->r);
+		if (sig->s)
+			BN_free(sig->s);
+		OPENSSL_free(sig);
+		}
 	}
 
diff --git a/crypto/dsa/dsa_vrf.c b/crypto/dsa/dsa_vrf.c
index 226a75ff3f..286ed28cfa 100644
--- a/crypto/dsa/dsa_vrf.c
+++ b/crypto/dsa/dsa_vrf.c
@@ -66,24 +66,3 @@ int DSA_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig,
 	{
 	return dsa->meth->dsa_do_verify(dgst, dgst_len, sig, dsa);
 	}
-
-/* data has already been hashed (probably with SHA or SHA-1). */
-/* returns
- *      1: correct signature
- *      0: incorrect signature
- *     -1: error
- */
-int DSA_verify(int type, const unsigned char *dgst, int dgst_len,
-	     const unsigned char *sigbuf, int siglen, DSA *dsa)
-	{
-	DSA_SIG *s;
-	int ret=-1;
-
-	s = DSA_SIG_new();
-	if (s == NULL) return(ret);
-	if (d2i_DSA_SIG(&s,&sigbuf,siglen) == NULL) goto err;
-	ret=DSA_do_verify(dgst,dgst_len,s,dsa);
-err:
-	DSA_SIG_free(s);
-	return(ret);
-	}