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path: root/crypto/rsa/rsa_eay.c
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Diffstat (limited to 'crypto/rsa/rsa_eay.c')
-rw-r--r--crypto/rsa/rsa_eay.c124
1 files changed, 64 insertions, 60 deletions
diff --git a/crypto/rsa/rsa_eay.c b/crypto/rsa/rsa_eay.c
index 00f8ea9341..7623189e41 100644
--- a/crypto/rsa/rsa_eay.c
+++ b/crypto/rsa/rsa_eay.c
@@ -110,11 +110,13 @@ unsigned char *to;
RSA *rsa;
int padding;
{
- BIGNUM *f=NULL,*ret=NULL;
+ BIGNUM f,ret;
int i,j,k,num=0,r= -1;
unsigned char *buf=NULL;
BN_CTX *ctx=NULL;
+ BN_init(&f);
+ BN_init(&ret);
if ((ctx=BN_CTX_new()) == NULL) goto err;
num=BN_num_bytes(rsa->n);
if ((buf=(unsigned char *)Malloc(num)) == NULL)
@@ -140,9 +142,7 @@ int padding;
}
if (i <= 0) goto err;
- if (((f=BN_new()) == NULL) || ((ret=BN_new()) == NULL)) goto err;
-
- if (BN_bin2bn(buf,num,f) == NULL) goto err;
+ if (BN_bin2bn(buf,num,&f) == NULL) goto err;
if ((rsa->method_mod_n == NULL) && (rsa->flags & RSA_FLAG_CACHE_PUBLIC))
{
@@ -151,21 +151,21 @@ int padding;
rsa->n,ctx)) goto err;
}
- if (!rsa->meth->bn_mod_exp(ret,f,rsa->e,rsa->n,ctx,
+ if (!rsa->meth->bn_mod_exp(&ret,&f,rsa->e,rsa->n,ctx,
rsa->method_mod_n)) goto err;
/* put in leading 0 bytes if the number is less than the
* length of the modulus */
- j=BN_num_bytes(ret);
- i=BN_bn2bin(ret,&(to[num-j]));
+ j=BN_num_bytes(&ret);
+ i=BN_bn2bin(&ret,&(to[num-j]));
for (k=0; k<(num-i); k++)
to[k]=0;
r=num;
err:
if (ctx != NULL) BN_CTX_free(ctx);
- if (f != NULL) BN_free(f);
- if (ret != NULL) BN_free(ret);
+ BN_clear_free(&f);
+ BN_clear_free(&ret);
if (buf != NULL)
{
memset(buf,0,num);
@@ -181,11 +181,14 @@ unsigned char *to;
RSA *rsa;
int padding;
{
- BIGNUM *f=NULL,*ret=NULL;
+ BIGNUM f,ret;
int i,j,k,num=0,r= -1;
unsigned char *buf=NULL;
BN_CTX *ctx=NULL;
+ BN_init(&f);
+ BN_init(&ret);
+
if ((ctx=BN_CTX_new()) == NULL) goto err;
num=BN_num_bytes(rsa->n);
if ((buf=(unsigned char *)Malloc(num)) == NULL)
@@ -209,40 +212,39 @@ int padding;
}
if (i <= 0) goto err;
- if (((f=BN_new()) == NULL) || ((ret=BN_new()) == NULL)) goto err;
- if (BN_bin2bn(buf,num,f) == NULL) goto err;
+ if (BN_bin2bn(buf,num,&f) == NULL) goto err;
if ((rsa->flags & RSA_FLAG_BLINDING) && (rsa->blinding == NULL))
RSA_blinding_on(rsa,ctx);
if (rsa->flags & RSA_FLAG_BLINDING)
- if (!BN_BLINDING_convert(f,rsa->blinding,ctx)) goto err;
+ if (!BN_BLINDING_convert(&f,rsa->blinding,ctx)) goto err;
if ( (rsa->p != NULL) &&
(rsa->q != NULL) &&
(rsa->dmp1 != NULL) &&
(rsa->dmq1 != NULL) &&
(rsa->iqmp != NULL))
- { if (!rsa->meth->rsa_mod_exp(ret,f,rsa)) goto err; }
+ { if (!rsa->meth->rsa_mod_exp(&ret,&f,rsa)) goto err; }
else
{
- if (!rsa->meth->bn_mod_exp(ret,f,rsa->d,rsa->n,ctx)) goto err;
+ if (!rsa->meth->bn_mod_exp(&ret,&f,rsa->d,rsa->n,ctx,NULL)) goto err;
}
if (rsa->flags & RSA_FLAG_BLINDING)
- if (!BN_BLINDING_invert(ret,rsa->blinding,ctx)) goto err;
+ if (!BN_BLINDING_invert(&ret,rsa->blinding,ctx)) goto err;
/* put in leading 0 bytes if the number is less than the
* length of the modulus */
- j=BN_num_bytes(ret);
- i=BN_bn2bin(ret,&(to[num-j]));
+ j=BN_num_bytes(&ret);
+ i=BN_bn2bin(&ret,&(to[num-j]));
for (k=0; k<(num-i); k++)
to[k]=0;
r=num;
err:
if (ctx != NULL) BN_CTX_free(ctx);
- if (ret != NULL) BN_free(ret);
- if (f != NULL) BN_free(f);
+ BN_clear_free(&ret);
+ BN_clear_free(&f);
if (buf != NULL)
{
memset(buf,0,num);
@@ -258,12 +260,14 @@ unsigned char *to;
RSA *rsa;
int padding;
{
- BIGNUM *f=NULL,*ret=NULL;
+ BIGNUM f,ret;
int j,num=0,r= -1;
unsigned char *p;
unsigned char *buf=NULL;
BN_CTX *ctx=NULL;
+ BN_init(&f);
+ BN_init(&ret);
ctx=BN_CTX_new();
if (ctx == NULL) goto err;
@@ -284,13 +288,12 @@ int padding;
}
/* make data into a big number */
- if (((ret=BN_new()) == NULL) || ((f=BN_new()) == NULL)) goto err;
- if (BN_bin2bn(from,(int)flen,f) == NULL) goto err;
+ if (BN_bin2bn(from,(int)flen,&f) == NULL) goto err;
if ((rsa->flags & RSA_FLAG_BLINDING) && (rsa->blinding == NULL))
RSA_blinding_on(rsa,ctx);
if (rsa->flags & RSA_FLAG_BLINDING)
- if (!BN_BLINDING_convert(f,rsa->blinding,ctx)) goto err;
+ if (!BN_BLINDING_convert(&f,rsa->blinding,ctx)) goto err;
/* do the decrypt */
if ( (rsa->p != NULL) &&
@@ -298,29 +301,29 @@ int padding;
(rsa->dmp1 != NULL) &&
(rsa->dmq1 != NULL) &&
(rsa->iqmp != NULL))
- { if (!rsa->meth->rsa_mod_exp(ret,f,rsa)) goto err; }
+ { if (!rsa->meth->rsa_mod_exp(&ret,&f,rsa)) goto err; }
else
{
- if (!rsa->meth->bn_mod_exp(ret,f,rsa->d,rsa->n,ctx))
+ if (!rsa->meth->bn_mod_exp(&ret,&f,rsa->d,rsa->n,ctx,NULL))
goto err;
}
if (rsa->flags & RSA_FLAG_BLINDING)
- if (!BN_BLINDING_invert(ret,rsa->blinding,ctx)) goto err;
+ if (!BN_BLINDING_invert(&ret,rsa->blinding,ctx)) goto err;
p=buf;
- j=BN_bn2bin(ret,p); /* j is only used with no-padding mode */
+ j=BN_bn2bin(&ret,p); /* j is only used with no-padding mode */
switch (padding)
{
case RSA_PKCS1_PADDING:
- r=RSA_padding_check_PKCS1_type_2(to,num,buf,j);
+ r=RSA_padding_check_PKCS1_type_2(to,num,buf,j,num);
break;
case RSA_SSLV23_PADDING:
- r=RSA_padding_check_SSLv23(to,num,buf,j);
+ r=RSA_padding_check_SSLv23(to,num,buf,j,num);
break;
case RSA_NO_PADDING:
- r=RSA_padding_check_none(to,num,buf,j);
+ r=RSA_padding_check_none(to,num,buf,j,num);
break;
default:
RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,RSA_R_UNKNOWN_PADDING_TYPE);
@@ -331,8 +334,8 @@ int padding;
err:
if (ctx != NULL) BN_CTX_free(ctx);
- if (f != NULL) BN_free(f);
- if (ret != NULL) BN_free(ret);
+ BN_clear_free(&f);
+ BN_clear_free(&ret);
if (buf != NULL)
{
memset(buf,0,num);
@@ -348,12 +351,14 @@ unsigned char *to;
RSA *rsa;
int padding;
{
- BIGNUM *f=NULL,*ret=NULL;
+ BIGNUM f,ret;
int i,num=0,r= -1;
unsigned char *p;
unsigned char *buf=NULL;
BN_CTX *ctx=NULL;
+ BN_init(&f);
+ BN_init(&ret);
ctx=BN_CTX_new();
if (ctx == NULL) goto err;
@@ -373,10 +378,7 @@ int padding;
goto err;
}
- /* make data into a big number */
- if (((ret=BN_new()) == NULL) || ((f=BN_new()) == NULL)) goto err;
-
- if (BN_bin2bn(from,flen,f) == NULL) goto err;
+ if (BN_bin2bn(from,flen,&f) == NULL) goto err;
/* do the decrypt */
if ((rsa->method_mod_n == NULL) && (rsa->flags & RSA_FLAG_CACHE_PUBLIC))
{
@@ -385,19 +387,19 @@ int padding;
rsa->n,ctx)) goto err;
}
- if (!rsa->meth->bn_mod_exp(ret,f,rsa->e,rsa->n,ctx,
+ if (!rsa->meth->bn_mod_exp(&ret,&f,rsa->e,rsa->n,ctx,
rsa->method_mod_n)) goto err;
p=buf;
- i=BN_bn2bin(ret,p);
+ i=BN_bn2bin(&ret,p);
switch (padding)
{
case RSA_PKCS1_PADDING:
- r=RSA_padding_check_PKCS1_type_1(to,num,buf,i);
+ r=RSA_padding_check_PKCS1_type_1(to,num,buf,i,num);
break;
case RSA_NO_PADDING:
- r=RSA_padding_check_none(to,num,buf,i);
+ r=RSA_padding_check_none(to,num,buf,i,num);
break;
default:
RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT,RSA_R_UNKNOWN_PADDING_TYPE);
@@ -408,8 +410,8 @@ int padding;
err:
if (ctx != NULL) BN_CTX_free(ctx);
- if (f != NULL) BN_free(f);
- if (ret != NULL) BN_free(ret);
+ BN_clear_free(&f);
+ BN_clear_free(&ret);
if (buf != NULL)
{
memset(buf,0,num);
@@ -423,14 +425,13 @@ BIGNUM *r0;
BIGNUM *I;
RSA *rsa;
{
- BIGNUM *r1=NULL,*m1=NULL;
+ BIGNUM r1,m1;
int ret=0;
BN_CTX *ctx;
if ((ctx=BN_CTX_new()) == NULL) goto err;
- m1=BN_new();
- r1=BN_new();
- if ((m1 == NULL) || (r1 == NULL)) goto err;
+ BN_init(&m1);
+ BN_init(&r1);
if (rsa->flags & RSA_FLAG_CACHE_PRIVATE)
{
@@ -452,26 +453,29 @@ RSA *rsa;
}
}
- if (!BN_mod(r1,I,rsa->q,ctx)) goto err;
- if (!rsa->meth->bn_mod_exp(m1,r1,rsa->dmq1,rsa->q,ctx,
+ if (!BN_mod(&r1,I,rsa->q,ctx)) goto err;
+ if (!rsa->meth->bn_mod_exp(&m1,&r1,rsa->dmq1,rsa->q,ctx,
rsa->method_mod_q)) goto err;
- if (!BN_mod(r1,I,rsa->p,ctx)) goto err;
- if (!rsa->meth->bn_mod_exp(r0,r1,rsa->dmp1,rsa->p,ctx,
+ if (!BN_mod(&r1,I,rsa->p,ctx)) goto err;
+ if (!rsa->meth->bn_mod_exp(r0,&r1,rsa->dmp1,rsa->p,ctx,
rsa->method_mod_p)) goto err;
- if (!BN_add(r1,r0,rsa->p)) goto err;
- if (!BN_sub(r0,r1,m1)) goto err;
+ if (!BN_sub(r0,r0,&m1)) goto err;
+ /* This will help stop the size of r0 increasing, which does
+ * affect the multiply if it optimised for a power of 2 size */
+ if (r0->neg)
+ if (!BN_add(r0,r0,rsa->p)) goto err;
- if (!BN_mul(r1,r0,rsa->iqmp)) goto err;
- if (!BN_mod(r0,r1,rsa->p,ctx)) goto err;
- if (!BN_mul(r1,r0,rsa->q)) goto err;
- if (!BN_add(r0,r1,m1)) goto err;
+ if (!BN_mul(&r1,r0,rsa->iqmp,ctx)) goto err;
+ if (!BN_mod(r0,&r1,rsa->p,ctx)) goto err;
+ if (!BN_mul(&r1,r0,rsa->q,ctx)) goto err;
+ if (!BN_add(r0,&r1,&m1)) goto err;
ret=1;
err:
- if (m1 != NULL) BN_free(m1);
- if (r1 != NULL) BN_free(r1);
+ BN_clear_free(&m1);
+ BN_clear_free(&r1);
BN_CTX_free(ctx);
return(ret);
}
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