Import of SSLeay-0.9.0b with RSA and IDEA stubbed + OpenBSD build

functionality for shared libs.

Note that routines such as sslv2_init and friends that use RSA will
not work due to lack of RSA in this library.

Needs documentation and help from ports for easy upgrade to full
functionality where legally possible.

1 files changed, 215 insertions, 0 deletions

diff --git a/src/lib/libcrypto/dsa/dsa_sign.c b/src/lib/libcrypto/dsa/dsa_sign.c
new file mode 100644
index 0000000000..6ca1c318f2
--- /dev/null
+++ b/src/lib/libcrypto/dsa/dsa_sign.c
@@ -0,0 +1,215 @@
+/* crypto/dsa/dsa_sign.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    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 the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+/* Origional version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include "bn.h"
+#include "dsa.h"
+#include "rand.h"
+#include "asn1.h"
+
+/* data has already been hashed (probably with SHA or SHA-1). */
+/*      DSAerr(DSA_F_DSA_SIGN,DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE); */
+
+int DSA_sign(type,dgst,dlen,sig,siglen,dsa)
+int type;
+unsigned char *dgst;
+int dlen;
+unsigned char *sig;     /* out */
+unsigned int *siglen;   /* out */
+DSA *dsa;
+        {
+        BIGNUM *kinv=NULL,*r=NULL;
+        BIGNUM *m=NULL;
+        BIGNUM *xr=NULL,*s=NULL;
+        BN_CTX *ctx=NULL;
+        unsigned char *p;
+        int i,len=0,ret=0,reason=ERR_R_BN_LIB;
+        ASN1_INTEGER rbs,sbs;
+        MS_STATIC unsigned char rbuf[50]; /* assuming r is 20 bytes +extra */
+        MS_STATIC unsigned char sbuf[50]; /* assuming s is 20 bytes +extra */
+
+        i=BN_num_bytes(dsa->q); /* should be 20 */
+        if ((dlen > i) || (dlen > 50))
+                {
+                reason=DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE;
+                goto err;
+                }
+
+        ctx=BN_CTX_new();
+        if (ctx == NULL) goto err;
+
+        if ((dsa->kinv == NULL) || (dsa->r == NULL))
+                {
+                if (!DSA_sign_setup(dsa,ctx,&kinv,&r)) goto err;
+                }
+        else
+                {
+                kinv=dsa->kinv;
+                dsa->kinv=NULL;
+                r=dsa->r;
+                dsa->r=NULL;
+                }
+
+        m=BN_new();
+        xr=BN_new();
+        s=BN_new();
+        if (m == NULL || xr == NULL || s == NULL) goto err;
+
+        if (BN_bin2bn(dgst,dlen,m) == NULL) goto err;
+
+        /* Compute  s = inv(k) (m + xr) mod q */
+        if (!BN_mul(xr, dsa->priv_key, r)) goto err;    /* s = xr */
+        if (!BN_add(s, xr, m)) goto err;                /* s = m + xr */
+        if (!BN_mod_mul(s,s,kinv,dsa->q,ctx)) goto err;
+
+        /*
+         * Now create a ASN.1 sequence of the integers R and S.
+         */
+        rbs.data=rbuf;
+        sbs.data=sbuf;
+        rbs.type = V_ASN1_INTEGER;
+        sbs.type = V_ASN1_INTEGER;
+        rbs.length=BN_bn2bin(r,rbs.data);
+        sbs.length=BN_bn2bin(s,sbs.data);
+
+        len =i2d_ASN1_INTEGER(&rbs,NULL);
+        len+=i2d_ASN1_INTEGER(&sbs,NULL);
+
+        p=sig;
+        ASN1_put_object(&p,1,len,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
+        i2d_ASN1_INTEGER(&rbs,&p);
+        i2d_ASN1_INTEGER(&sbs,&p);
+        *siglen=(p-sig);
+        ret=1;
+err:
+        if (!ret) DSAerr(DSA_F_DSA_SIGN,reason);
+                
+#if 1 /* do the right thing :-) */
+        if (kinv != NULL) BN_clear_free(kinv);
+        if (r != NULL) BN_clear_free(r);
+#endif
+        if (ctx != NULL) BN_CTX_free(ctx);
+        if (m != NULL) BN_clear_free(m);
+        if (xr != NULL) BN_clear_free(xr);
+        if (s != NULL) BN_clear_free(s);
+        return(ret);
+        }
+
+int DSA_sign_setup(dsa,ctx_in,kinvp,rp)
+DSA *dsa;
+BN_CTX *ctx_in;
+BIGNUM **kinvp;
+BIGNUM **rp;
+        {
+        BN_CTX *ctx;
+        BIGNUM *k=NULL,*kinv=NULL,*r=NULL;
+        int ret=0;
+
+        if (ctx_in == NULL)
+                {
+                if ((ctx=BN_CTX_new()) == NULL) goto err;
+                }
+        else
+                ctx=ctx_in;
+
+        r=BN_new();
+        k=BN_new();
+        if ((r == NULL) || (k == NULL))
+                goto err;
+        kinv=NULL;
+
+        if (r == NULL) goto err;
+
+        /* Get random k */
+        for (;;)
+                {
+                if (!BN_rand(k, BN_num_bits(dsa->q), 1, 0)) goto err;
+                if (BN_cmp(k,dsa->q) >= 0)
+                        BN_sub(k,k,dsa->q);
+                if (!BN_is_zero(k)) break;
+                }
+
+        /* Compute r = (g^k mod p) mod q */
+        if (!BN_mod_exp(r,dsa->g,k,dsa->p,ctx)) goto err;
+        if (!BN_mod(r,r,dsa->q,ctx)) goto err;
+
+        /* Compute  part of 's = inv(k) (m + xr) mod q' */
+        if ((kinv=BN_mod_inverse(k,dsa->q,ctx)) == NULL) goto err;
+
+        if (*kinvp != NULL) BN_clear_free(*kinvp);
+        *kinvp=kinv;
+        kinv=NULL;
+        if (*rp != NULL) BN_clear_free(*rp);
+        *rp=r;
+        ret=1;
+err:
+        if (!ret)
+                {
+                DSAerr(DSA_F_DSA_SIGN_SETUP,ERR_R_BN_LIB);
+                if (kinv != NULL) BN_clear_free(kinv);
+                if (r != NULL) BN_clear_free(r);
+                }
+        if (ctx_in == NULL) BN_CTX_free(ctx);
+        if (k != NULL) BN_clear_free(k);
+        if (kinv != NULL) BN_clear_free(kinv);
+        return(ret);
+        }
+