diff options
Diffstat (limited to 'ssh-rsa.c')
| -rw-r--r-- | ssh-rsa.c | 20 |
1 files changed, 7 insertions, 13 deletions
@@ -23,7 +23,7 @@ */ #include "includes.h" -RCSID("$OpenBSD: ssh-rsa.c,v 1.14 2001/12/05 10:06:12 deraadt Exp $"); +RCSID("$OpenBSD: ssh-rsa.c,v 1.15 2002/01/25 21:42:11 markus Exp $"); #include <openssl/evp.h> #include <openssl/err.h> @@ -45,7 +45,7 @@ ssh_rsa_sign( { const EVP_MD *evp_md; EVP_MD_CTX md; - u_char *digest, *sig, *ret; + u_char digest[EVP_MAX_MD_SIZE], *sig, *ret; u_int slen, dlen, len; int ok, nid; Buffer b; @@ -63,18 +63,15 @@ ssh_rsa_sign( error("ssh_rsa_sign: EVP_get_digestbynid %d failed", nid); return -1; } - dlen = evp_md->md_size; - digest = xmalloc(dlen); EVP_DigestInit(&md, evp_md); EVP_DigestUpdate(&md, data, datalen); - EVP_DigestFinal(&md, digest, NULL); + EVP_DigestFinal(&md, digest, &dlen); slen = RSA_size(key->rsa); sig = xmalloc(slen); ok = RSA_sign(nid, digest, dlen, sig, &len, key->rsa); - memset(digest, 'd', dlen); - xfree(digest); + memset(digest, 'd', sizeof(digest)); if (ok != 1) { int ecode = ERR_get_error(); @@ -120,7 +117,7 @@ ssh_rsa_verify( const EVP_MD *evp_md; EVP_MD_CTX md; char *ktype; - u_char *sigblob, *digest; + u_char digest[EVP_MAX_MD_SIZE], *sigblob; u_int len, dlen; int rlen, ret, nid; @@ -161,15 +158,12 @@ ssh_rsa_verify( xfree(sigblob); return -1; } - dlen = evp_md->md_size; - digest = xmalloc(dlen); EVP_DigestInit(&md, evp_md); EVP_DigestUpdate(&md, data, datalen); - EVP_DigestFinal(&md, digest, NULL); + EVP_DigestFinal(&md, digest, &dlen); ret = RSA_verify(nid, digest, dlen, sigblob, len, key->rsa); - memset(digest, 'd', dlen); - xfree(digest); + memset(digest, 'd', sizeof(digest)); memset(sigblob, 's', len); xfree(sigblob); if (ret == 0) { |