diff options
author | Ulf Möller <ulf@openssl.org> | 1999-04-09 16:24:32 +0000 |
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committer | Ulf Möller <ulf@openssl.org> | 1999-04-09 16:24:32 +0000 |
commit | a8da89186c447932b9f5abced708330a3bff313b (patch) | |
tree | 0a2db3e074643271b2300dbd19fc0c93f86fd9d9 /crypto/dsa/dsa_asn1.c | |
parent | dae08db4a0d8bb972315988150187c9f091c557e (diff) |
Separate DSA functionality from ASN.1 encoding.
New functions DSA_do_sign and DSA_do_verify to provide access to
the raw DSA values.
Diffstat (limited to 'crypto/dsa/dsa_asn1.c')
-rw-r--r-- | crypto/dsa/dsa_asn1.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/crypto/dsa/dsa_asn1.c b/crypto/dsa/dsa_asn1.c new file mode 100644 index 0000000000..b7fa7eda4f --- /dev/null +++ b/crypto/dsa/dsa_asn1.c @@ -0,0 +1,102 @@ +/* crypto/dsa/dsa_asn1.c */ + +#include <stdio.h> +#include "cryptlib.h" +#include "dsa.h" +#include "asn1.h" +#include "asn1_mac.h" + +DSA_SIG *DSA_SIG_new(void) +{ + DSA_SIG *ret; + + ret = Malloc(sizeof(DSA_SIG)); + if (ret == NULL) + { + DSAerr(DSA_F_DSA_SIG_NEW,ERR_R_MALLOC_FAILURE); + return(NULL); + } + ret->r = NULL; + ret->s = NULL; + return(ret); +} + +void DSA_SIG_free(r) +DSA_SIG *r; +{ + if (r == NULL) return; + if (r->r) BN_clear_free(r->r); + if (r->s) BN_clear_free(r->s); + Free(r); +} + +int i2d_DSA_SIG(v,pp) +DSA_SIG *v; +unsigned char **pp; +{ + int t=0,len; + ASN1_INTEGER rbs,sbs; + unsigned char *p; + + rbs.data=Malloc(BN_num_bits(v->r)/8+1); + if (rbs.data == NULL) + { + DSAerr(DSA_F_I2D_DSA_SIG, ERR_R_MALLOC_FAILURE); + return(0); + } + rbs.type=V_ASN1_INTEGER; + rbs.length=BN_bn2bin(v->r,rbs.data); + sbs.data=Malloc(BN_num_bits(v->s)/8+1); + if (sbs.data == NULL) + { + Free(rbs.data); + DSAerr(DSA_F_I2D_DSA_SIG, ERR_R_MALLOC_FAILURE); + return(0); + } + sbs.type=V_ASN1_INTEGER; + sbs.length=BN_bn2bin(v->s,sbs.data); + + len=i2d_ASN1_INTEGER(&rbs,NULL); + len+=i2d_ASN1_INTEGER(&sbs,NULL); + + if (pp) + { + p=*pp; + ASN1_put_object(&p,1,len,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL); + i2d_ASN1_INTEGER(&rbs,&p); + i2d_ASN1_INTEGER(&sbs,&p); + } + t=ASN1_object_size(1,len,V_ASN1_SEQUENCE); + Free(rbs.data); + Free(sbs.data); + return(t); +} + +DSA_SIG *d2i_DSA_SIG(a,pp,length) +DSA_SIG **a; +unsigned char **pp; +long length; +{ + int i=ERR_R_NESTED_ASN1_ERROR; + ASN1_INTEGER *bs=NULL; + M_ASN1_D2I_vars(a,DSA_SIG *,DSA_SIG_new); + + M_ASN1_D2I_Init(); + M_ASN1_D2I_start_sequence(); + M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER); + if ((ret->r=BN_bin2bn(bs->data,bs->length,ret->r)) == NULL) + goto err_bn; + M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER); + if ((ret->s=BN_bin2bn(bs->data,bs->length,ret->s)) == NULL) + goto err_bn; + ASN1_BIT_STRING_free(bs); + M_ASN1_D2I_Finish_2(a); + +err_bn: + i=ERR_R_BN_LIB; +err: + DSAerr(DSA_F_D2I_DSA_SIG,i); + if ((ret != NULL) && ((a == NULL) || (*a != ret))) DSA_SIG_free(ret); + if (bs != NULL) ASN1_BIT_STRING_free(bs); + return(NULL); +} |