1 /* crypto/dsa/dsa_asn1.c */ 2 3 #include <stdio.h> 4 #include "cryptlib.h" 5 #include <openssl/dsa.h> 6 #include <openssl/asn1.h> 7 #include <openssl/asn1_mac.h> 8 9 DSA_SIG *DSA_SIG_new(void) 10 { 11 DSA_SIG *ret; 12 13 ret = OPENSSL_malloc(sizeof(DSA_SIG)); 14 if (ret == NULL) 15 { 16 DSAerr(DSA_F_DSA_SIG_NEW,ERR_R_MALLOC_FAILURE); 17 return(NULL); 18 } 19 ret->r = NULL; 20 ret->s = NULL; 21 return(ret); 22 } 23 24 void DSA_SIG_free(DSA_SIG *r) 25 { 26 if (r == NULL) return; 27 if (r->r) BN_clear_free(r->r); 28 if (r->s) BN_clear_free(r->s); 29 OPENSSL_free(r); 30 } 31 32 int i2d_DSA_SIG(DSA_SIG *v, unsigned char **pp) 33 { 34 int t=0,len; 35 ASN1_INTEGER rbs,sbs; 36 unsigned char *p; 37 38 rbs.data=OPENSSL_malloc(BN_num_bits(v->r)/8+1); 39 if (rbs.data == NULL) 40 { 41 DSAerr(DSA_F_I2D_DSA_SIG, ERR_R_MALLOC_FAILURE); 42 return(0); 43 } 44 rbs.type=V_ASN1_INTEGER; 45 rbs.length=BN_bn2bin(v->r,rbs.data); 46 sbs.data=OPENSSL_malloc(BN_num_bits(v->s)/8+1); 47 if (sbs.data == NULL) 48 { 49 OPENSSL_free(rbs.data); 50 DSAerr(DSA_F_I2D_DSA_SIG, ERR_R_MALLOC_FAILURE); 51 return(0); 52 } 53 sbs.type=V_ASN1_INTEGER; 54 sbs.length=BN_bn2bin(v->s,sbs.data); 55 56 len=i2d_ASN1_INTEGER(&rbs,NULL); 57 len+=i2d_ASN1_INTEGER(&sbs,NULL); 58 59 if (pp) 60 { 61 p=*pp; 62 ASN1_put_object(&p,1,len,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL); 63 i2d_ASN1_INTEGER(&rbs,&p); 64 i2d_ASN1_INTEGER(&sbs,&p); 65 } 66 t=ASN1_object_size(1,len,V_ASN1_SEQUENCE); 67 OPENSSL_free(rbs.data); 68 OPENSSL_free(sbs.data); 69 return(t); 70 } 71 72 DSA_SIG *d2i_DSA_SIG(DSA_SIG **a, unsigned char **pp, long length) 73 { 74 int i=ERR_R_NESTED_ASN1_ERROR; 75 ASN1_INTEGER *bs=NULL; 76 M_ASN1_D2I_vars(a,DSA_SIG *,DSA_SIG_new); 77 78 M_ASN1_D2I_Init(); 79 M_ASN1_D2I_start_sequence(); 80 M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER); 81 if ((ret->r=BN_bin2bn(bs->data,bs->length,ret->r)) == NULL) 82 goto err_bn; 83 M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER); 84 if ((ret->s=BN_bin2bn(bs->data,bs->length,ret->s)) == NULL) 85 goto err_bn; 86 M_ASN1_BIT_STRING_free(bs); 87 M_ASN1_D2I_Finish_2(a); 88 89 err_bn: 90 i=ERR_R_BN_LIB; 91 err: 92 DSAerr(DSA_F_D2I_DSA_SIG,i); 93 if ((ret != NULL) && ((a == NULL) || (*a != ret))) DSA_SIG_free(ret); 94 if (bs != NULL) M_ASN1_BIT_STRING_free(bs); 95 return(NULL); 96 } 97