330 lines
8 KiB
C
330 lines
8 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/pkcs7.h>
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#include <openssl/asn1_mac.h>
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#include <openssl/x509.h>
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int add_signed_time(PKCS7_SIGNER_INFO *si)
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{
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ASN1_UTCTIME *sign_time;
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/* The last parameter is the amount to add/subtract from the current
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* time (in seconds) */
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sign_time=X509_gmtime_adj(NULL,0);
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PKCS7_add_signed_attribute(si,NID_pkcs9_signingTime,
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V_ASN1_UTCTIME,(char *)sign_time);
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return(1);
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}
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ASN1_UTCTIME *get_signed_time(PKCS7_SIGNER_INFO *si)
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{
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ASN1_TYPE *so;
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so=PKCS7_get_signed_attribute(si,NID_pkcs9_signingTime);
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if (so->type == V_ASN1_UTCTIME)
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return so->value.utctime;
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return NULL;
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}
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static int signed_string_nid= -1;
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void add_signed_string(PKCS7_SIGNER_INFO *si, char *str)
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{
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ASN1_OCTET_STRING *os;
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/* To a an object of OID 1.2.3.4.5, which is an octet string */
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if (signed_string_nid == -1)
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signed_string_nid=
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OBJ_create("1.2.3.4.5","OID_example","Our example OID");
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os=ASN1_OCTET_STRING_new();
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ASN1_OCTET_STRING_set(os,(unsigned char*)str,strlen(str));
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/* When we add, we do not free */
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PKCS7_add_signed_attribute(si,signed_string_nid,
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V_ASN1_OCTET_STRING,(char *)os);
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}
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int get_signed_string(PKCS7_SIGNER_INFO *si, char *buf, int len)
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{
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ASN1_TYPE *so;
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ASN1_OCTET_STRING *os;
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int i;
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if (signed_string_nid == -1)
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signed_string_nid=
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OBJ_create("1.2.3.4.5","OID_example","Our example OID");
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/* To retrieve */
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so=PKCS7_get_signed_attribute(si,signed_string_nid);
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if (so != NULL)
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{
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if (so->type == V_ASN1_OCTET_STRING)
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{
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os=so->value.octet_string;
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i=os->length;
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if ((i+1) > len)
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i=len-1;
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memcpy(buf,os->data,i);
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return(i);
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}
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}
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return(0);
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}
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static int signed_seq2string_nid= -1;
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/* ########################################### */
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int add_signed_seq2string(PKCS7_SIGNER_INFO *si, char *str1, char *str2)
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{
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/* To add an object of OID 1.9.999, which is a sequence containing
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* 2 octet strings */
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unsigned char *p;
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ASN1_OCTET_STRING *os1,*os2;
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ASN1_STRING *seq;
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unsigned char *data;
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int i,total;
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if (signed_seq2string_nid == -1)
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signed_seq2string_nid=
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OBJ_create("1.9.9999","OID_example","Our example OID");
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os1=ASN1_OCTET_STRING_new();
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os2=ASN1_OCTET_STRING_new();
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ASN1_OCTET_STRING_set(os1,(unsigned char*)str1,strlen(str1));
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ASN1_OCTET_STRING_set(os2,(unsigned char*)str1,strlen(str1));
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i =i2d_ASN1_OCTET_STRING(os1,NULL);
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i+=i2d_ASN1_OCTET_STRING(os2,NULL);
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total=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
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data=malloc(total);
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p=data;
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ASN1_put_object(&p,1,i,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
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i2d_ASN1_OCTET_STRING(os1,&p);
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i2d_ASN1_OCTET_STRING(os2,&p);
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seq=ASN1_STRING_new();
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ASN1_STRING_set(seq,data,total);
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free(data);
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ASN1_OCTET_STRING_free(os1);
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ASN1_OCTET_STRING_free(os2);
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PKCS7_add_signed_attribute(si,signed_seq2string_nid,
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V_ASN1_SEQUENCE,(char *)seq);
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return(1);
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}
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/* For this case, I will malloc the return strings */
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int get_signed_seq2string(PKCS7_SIGNER_INFO *si, char **str1, char **str2)
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{
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ASN1_TYPE *so;
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if (signed_seq2string_nid == -1)
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signed_seq2string_nid=
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OBJ_create("1.9.9999","OID_example","Our example OID");
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/* To retrieve */
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so=PKCS7_get_signed_attribute(si,signed_seq2string_nid);
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if (so && (so->type == V_ASN1_SEQUENCE))
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{
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ASN1_const_CTX c;
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ASN1_STRING *s;
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long length;
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ASN1_OCTET_STRING *os1,*os2;
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s=so->value.sequence;
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c.p=ASN1_STRING_data(s);
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c.max=c.p+ASN1_STRING_length(s);
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if (!asn1_GetSequence(&c,&length)) goto err;
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/* Length is the length of the seqence */
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c.q=c.p;
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if ((os1=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL)
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goto err;
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c.slen-=(c.p-c.q);
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c.q=c.p;
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if ((os2=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL)
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goto err;
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c.slen-=(c.p-c.q);
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if (!asn1_const_Finish(&c)) goto err;
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*str1=malloc(os1->length+1);
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*str2=malloc(os2->length+1);
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memcpy(*str1,os1->data,os1->length);
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memcpy(*str2,os2->data,os2->length);
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(*str1)[os1->length]='\0';
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(*str2)[os2->length]='\0';
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ASN1_OCTET_STRING_free(os1);
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ASN1_OCTET_STRING_free(os2);
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return(1);
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}
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err:
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return(0);
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}
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/* #######################################
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* THE OTHER WAY TO DO THINGS
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* #######################################
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*/
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X509_ATTRIBUTE *create_time(void)
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{
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ASN1_UTCTIME *sign_time;
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X509_ATTRIBUTE *ret;
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/* The last parameter is the amount to add/subtract from the current
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* time (in seconds) */
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sign_time=X509_gmtime_adj(NULL,0);
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ret=X509_ATTRIBUTE_create(NID_pkcs9_signingTime,
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V_ASN1_UTCTIME,(char *)sign_time);
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return(ret);
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}
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ASN1_UTCTIME *sk_get_time(STACK_OF(X509_ATTRIBUTE) *sk)
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{
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ASN1_TYPE *so;
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PKCS7_SIGNER_INFO si;
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si.auth_attr=sk;
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so=PKCS7_get_signed_attribute(&si,NID_pkcs9_signingTime);
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if (so->type == V_ASN1_UTCTIME)
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return so->value.utctime;
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return NULL;
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}
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X509_ATTRIBUTE *create_string(char *str)
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{
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ASN1_OCTET_STRING *os;
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X509_ATTRIBUTE *ret;
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/* To a an object of OID 1.2.3.4.5, which is an octet string */
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if (signed_string_nid == -1)
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signed_string_nid=
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OBJ_create("1.2.3.4.5","OID_example","Our example OID");
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os=ASN1_OCTET_STRING_new();
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ASN1_OCTET_STRING_set(os,(unsigned char*)str,strlen(str));
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/* When we add, we do not free */
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ret=X509_ATTRIBUTE_create(signed_string_nid,
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V_ASN1_OCTET_STRING,(char *)os);
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return(ret);
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}
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int sk_get_string(STACK_OF(X509_ATTRIBUTE) *sk, char *buf, int len)
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{
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ASN1_TYPE *so;
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ASN1_OCTET_STRING *os;
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int i;
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PKCS7_SIGNER_INFO si;
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si.auth_attr=sk;
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if (signed_string_nid == -1)
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signed_string_nid=
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OBJ_create("1.2.3.4.5","OID_example","Our example OID");
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/* To retrieve */
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so=PKCS7_get_signed_attribute(&si,signed_string_nid);
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if (so != NULL)
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{
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if (so->type == V_ASN1_OCTET_STRING)
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{
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os=so->value.octet_string;
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i=os->length;
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if ((i+1) > len)
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i=len-1;
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memcpy(buf,os->data,i);
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return(i);
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}
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}
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return(0);
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}
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X509_ATTRIBUTE *add_seq2string(PKCS7_SIGNER_INFO *si, char *str1, char *str2)
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{
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/* To add an object of OID 1.9.999, which is a sequence containing
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* 2 octet strings */
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unsigned char *p;
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ASN1_OCTET_STRING *os1,*os2;
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ASN1_STRING *seq;
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X509_ATTRIBUTE *ret;
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unsigned char *data;
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int i,total;
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if (signed_seq2string_nid == -1)
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signed_seq2string_nid=
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OBJ_create("1.9.9999","OID_example","Our example OID");
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os1=ASN1_OCTET_STRING_new();
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os2=ASN1_OCTET_STRING_new();
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ASN1_OCTET_STRING_set(os1,(unsigned char*)str1,strlen(str1));
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ASN1_OCTET_STRING_set(os2,(unsigned char*)str1,strlen(str1));
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i =i2d_ASN1_OCTET_STRING(os1,NULL);
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i+=i2d_ASN1_OCTET_STRING(os2,NULL);
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total=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
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data=malloc(total);
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p=data;
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ASN1_put_object(&p,1,i,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
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i2d_ASN1_OCTET_STRING(os1,&p);
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i2d_ASN1_OCTET_STRING(os2,&p);
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seq=ASN1_STRING_new();
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ASN1_STRING_set(seq,data,total);
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free(data);
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ASN1_OCTET_STRING_free(os1);
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ASN1_OCTET_STRING_free(os2);
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ret=X509_ATTRIBUTE_create(signed_seq2string_nid,
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V_ASN1_SEQUENCE,(char *)seq);
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return(ret);
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}
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/* For this case, I will malloc the return strings */
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int sk_get_seq2string(STACK_OF(X509_ATTRIBUTE) *sk, char **str1, char **str2)
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{
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ASN1_TYPE *so;
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PKCS7_SIGNER_INFO si;
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if (signed_seq2string_nid == -1)
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signed_seq2string_nid=
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OBJ_create("1.9.9999","OID_example","Our example OID");
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si.auth_attr=sk;
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/* To retrieve */
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so=PKCS7_get_signed_attribute(&si,signed_seq2string_nid);
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if (so->type == V_ASN1_SEQUENCE)
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{
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ASN1_const_CTX c;
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ASN1_STRING *s;
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long length;
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ASN1_OCTET_STRING *os1,*os2;
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s=so->value.sequence;
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c.p=ASN1_STRING_data(s);
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c.max=c.p+ASN1_STRING_length(s);
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if (!asn1_GetSequence(&c,&length)) goto err;
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/* Length is the length of the seqence */
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c.q=c.p;
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if ((os1=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL)
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goto err;
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c.slen-=(c.p-c.q);
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c.q=c.p;
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if ((os2=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL)
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goto err;
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c.slen-=(c.p-c.q);
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if (!asn1_const_Finish(&c)) goto err;
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*str1=malloc(os1->length+1);
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*str2=malloc(os2->length+1);
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memcpy(*str1,os1->data,os1->length);
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memcpy(*str2,os2->data,os2->length);
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(*str1)[os1->length]='\0';
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(*str2)[os2->length]='\0';
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ASN1_OCTET_STRING_free(os1);
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ASN1_OCTET_STRING_free(os2);
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return(1);
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}
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err:
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return(0);
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}
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