diff options
Diffstat (limited to 'crypto/asn1/a_sign.c')
-rw-r--r-- | crypto/asn1/a_sign.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/crypto/asn1/a_sign.c b/crypto/asn1/a_sign.c index 4c651706d2..5be077ddfc 100644 --- a/crypto/asn1/a_sign.c +++ b/crypto/asn1/a_sign.c @@ -146,3 +146,76 @@ err: { memset((char *)buf_out,0,outll); OPENSSL_free(buf_out); } return(outl); } + +int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2, + ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey, + const EVP_MD *type) + { + EVP_MD_CTX ctx; + unsigned char *buf_in=NULL,*buf_out=NULL; + int i,inl=0,outl=0,outll=0; + X509_ALGOR *a; + + for (i=0; i<2; i++) + { + if (i == 0) + a=algor1; + else + a=algor2; + if (a == NULL) continue; + if ( (a->parameter == NULL) || + (a->parameter->type != V_ASN1_NULL)) + { + ASN1_TYPE_free(a->parameter); + if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err; + a->parameter->type=V_ASN1_NULL; + } + ASN1_OBJECT_free(a->algorithm); + a->algorithm=OBJ_nid2obj(type->pkey_type); + if (a->algorithm == NULL) + { + ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE); + goto err; + } + if (a->algorithm->length == 0) + { + ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); + goto err; + } + } + inl=ASN1_item_i2d(asn,&buf_in, it); + outll=outl=EVP_PKEY_size(pkey); + buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl); + if ((buf_in == NULL) || (buf_out == NULL)) + { + outl=0; + ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE); + goto err; + } + + EVP_SignInit(&ctx,type); + EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl); + if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out, + (unsigned int *)&outl,pkey)) + { + outl=0; + ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB); + goto err; + } + if (signature->data != NULL) OPENSSL_free(signature->data); + signature->data=buf_out; + buf_out=NULL; + signature->length=outl; + /* In the interests of compatibility, I'll make sure that + * the bit string has a 'not-used bits' value of 0 + */ + signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); + signature->flags|=ASN1_STRING_FLAG_BITS_LEFT; +err: + memset(&ctx,0,sizeof(ctx)); + if (buf_in != NULL) + { memset((char *)buf_in,0,(unsigned int)inl); OPENSSL_free(buf_in); } + if (buf_out != NULL) + { memset((char *)buf_out,0,outll); OPENSSL_free(buf_out); } + return(outl); + } |