96 lines
2 KiB
C
96 lines
2 KiB
C
/* crypto/dsa/dsa_asn1.c */
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/dsa.h>
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#include <openssl/asn1.h>
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#include <openssl/asn1_mac.h>
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DSA_SIG *DSA_SIG_new(void)
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{
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DSA_SIG *ret;
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ret = Malloc(sizeof(DSA_SIG));
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if (ret == NULL)
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{
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DSAerr(DSA_F_DSA_SIG_NEW,ERR_R_MALLOC_FAILURE);
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return(NULL);
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}
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ret->r = NULL;
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ret->s = NULL;
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return(ret);
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}
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void DSA_SIG_free(DSA_SIG *r)
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{
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if (r == NULL) return;
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if (r->r) BN_clear_free(r->r);
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if (r->s) BN_clear_free(r->s);
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Free(r);
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}
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int i2d_DSA_SIG(DSA_SIG *v, unsigned char **pp)
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{
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int t=0,len;
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ASN1_INTEGER rbs,sbs;
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unsigned char *p;
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rbs.data=Malloc(BN_num_bits(v->r)/8+1);
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if (rbs.data == NULL)
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{
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DSAerr(DSA_F_I2D_DSA_SIG, ERR_R_MALLOC_FAILURE);
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return(0);
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}
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rbs.type=V_ASN1_INTEGER;
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rbs.length=BN_bn2bin(v->r,rbs.data);
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sbs.data=Malloc(BN_num_bits(v->s)/8+1);
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if (sbs.data == NULL)
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{
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Free(rbs.data);
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DSAerr(DSA_F_I2D_DSA_SIG, ERR_R_MALLOC_FAILURE);
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return(0);
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}
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sbs.type=V_ASN1_INTEGER;
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sbs.length=BN_bn2bin(v->s,sbs.data);
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len=i2d_ASN1_INTEGER(&rbs,NULL);
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len+=i2d_ASN1_INTEGER(&sbs,NULL);
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if (pp)
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{
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p=*pp;
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ASN1_put_object(&p,1,len,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
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i2d_ASN1_INTEGER(&rbs,&p);
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i2d_ASN1_INTEGER(&sbs,&p);
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}
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t=ASN1_object_size(1,len,V_ASN1_SEQUENCE);
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Free(rbs.data);
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Free(sbs.data);
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return(t);
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}
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DSA_SIG *d2i_DSA_SIG(DSA_SIG **a, unsigned char **pp, long length)
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{
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int i=ERR_R_NESTED_ASN1_ERROR;
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ASN1_INTEGER *bs=NULL;
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M_ASN1_D2I_vars(a,DSA_SIG *,DSA_SIG_new);
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M_ASN1_D2I_Init();
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M_ASN1_D2I_start_sequence();
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M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER);
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if ((ret->r=BN_bin2bn(bs->data,bs->length,ret->r)) == NULL)
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goto err_bn;
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M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER);
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if ((ret->s=BN_bin2bn(bs->data,bs->length,ret->s)) == NULL)
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goto err_bn;
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M_ASN1_BIT_STRING_free(bs);
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M_ASN1_D2I_Finish_2(a);
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err_bn:
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i=ERR_R_BN_LIB;
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err:
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DSAerr(DSA_F_D2I_DSA_SIG,i);
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if ((ret != NULL) && ((a == NULL) || (*a != ret))) DSA_SIG_free(ret);
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if (bs != NULL) M_ASN1_BIT_STRING_free(bs);
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return(NULL);
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}
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