Thanks Steve for pointing out that i posting to the wrong list, sorry my bad
for some reason i didn't read it right. anyways...
lemme give some background
i have a plain text file plain.txt
i call
#> openssl rsautl -sign -inkey ./private/cakey.pem -in plain.txt -out
signature.bin
so my first question
1) what kind of hashing alogrithm would the above command use ? is it
possible to suggest one to use like sha1 or md5 etc ...
in my c code i'm using the EVP_verify interface to verify the signature.bin
here's what i do
* I load the cert
* read the public key into EVP_PKEY
* read the plaintext into a buffer 'plainTextData'
* read the signature.bin into a buffer 'sig_buf'
and then do the followin
EVP_MD_CTX_init(&md_ctx);
EVP_VerifyInit (&md_ctx, EVP_sha1()); <--- here i'm not sure which
hash algo to specify. ???
EVP_VerifyUpdate (&md_ctx, plainTextData, plainTextSize);
err = EVP_VerifyFinal (&md_ctx, sig_buf, sig_len, pkey);
here what i get
11908:error:0D0890A1:asn1 encoding routines:ASN1_verify:unknown message
digest algorithm:a_verify.c:141:
11908:error:0D07209B:asn1 encoding routines:ASN1_get_object:too
long:asn1_lib.c:132:
11908:error:0D068066:asn1 encoding routines:ASN1_CHECK_TLEN:bad object
header:tasn_dec.c:935:
11908:error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1
error:tasn_dec.c:304:Type=X509_SIG
Any lead would appreciated, as i'm out of ideas.
Thanks
KB
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