diff options
| author | Dr. Stephen Henson <steve@openssl.org> | 2010-03-06 18:05:05 +0000 |
|---|---|---|
| committer | Dr. Stephen Henson <steve@openssl.org> | 2010-03-06 18:05:05 +0000 |
| commit | fa1ba589f3feab2c1d8c87109d18978238a9877f (patch) | |
| tree | 15c7aeba40a8354dd80c5bd83bd8f2ac3b383b89 /crypto/dsa | |
| parent | 8c4ce7bab2dd880696d78f19336e3cabacbccb4a (diff) | |
| download | openssl-fa1ba589f3feab2c1d8c87109d18978238a9877f.tar.gz | |
Add algorithm specific signature printing. An individual ASN1 method can
now print out signatures instead of the standard hex dump.
More complex signatures (e.g. PSS) can print out more meaningful information.
Sample DSA version included that prints out the signature parameters r, s.
[Note EVP_PKEY_ASN1_METHOD is an application opaque structure so adding
new fields in the middle has no compatibility issues]
Diffstat (limited to 'crypto/dsa')
| -rw-r--r-- | crypto/dsa/dsa_ameth.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/crypto/dsa/dsa_ameth.c b/crypto/dsa/dsa_ameth.c index 5482330c84..539b51f951 100644 --- a/crypto/dsa/dsa_ameth.c +++ b/crypto/dsa/dsa_ameth.c @@ -542,6 +542,44 @@ static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) return i2d_DSAPrivateKey(pkey->pkey.dsa, pder); } +static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, + const ASN1_STRING *sig, + int indent, ASN1_PCTX *pctx) + { + DSA_SIG *dsa_sig; + const unsigned char *p = sig->data; + dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length); + if (dsa_sig) + { + int rv = 0; + size_t buf_len = 0; + unsigned char *m=NULL; + update_buflen(dsa_sig->r, &buf_len); + update_buflen(dsa_sig->s, &buf_len); + m = OPENSSL_malloc(buf_len+10); + if (m == NULL) + { + DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE); + goto err; + } + + if (BIO_write(bp, "\n", 1) != 1) + goto err; + + if (!ASN1_bn_print(bp,"r: ",dsa_sig->r,m,indent)) + goto err; + if (!ASN1_bn_print(bp,"s: ",dsa_sig->s,m,indent)) + goto err; + rv = 1; + err: + if (m) + OPENSSL_free(m); + DSA_SIG_free(dsa_sig); + return rv; + } + return X509_signature_dump(bp, sig, indent); + } + static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) { switch (op) @@ -647,6 +685,7 @@ const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = dsa_copy_parameters, dsa_cmp_parameters, dsa_param_print, + dsa_sig_print, int_dsa_free, dsa_pkey_ctrl, |