#include <openssl/rsa.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
+#include "rsa_locl.h"
/* Size of an SSL signature: MD5+SHA1 */
#define SSL_SIG_LENGTH 36
return(ret);
}
-int RSA_verify(int dtype, const unsigned char *m, unsigned int m_len,
- unsigned char *sigbuf, unsigned int siglen, RSA *rsa)
+int int_rsa_verify(int dtype, const unsigned char *m,
+ unsigned int m_len,
+ unsigned char *rm, size_t *prm_len,
+ const unsigned char *sigbuf, size_t siglen,
+ RSA *rsa)
{
int i,ret=0,sigtype;
unsigned char *s;
if (siglen != (unsigned int)RSA_size(rsa))
{
- RSAerr(RSA_F_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
+ RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
return(0);
}
- if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify)
+ if((dtype == NID_md5_sha1) && rm)
{
- return rsa->meth->rsa_verify(dtype, m, m_len,
- sigbuf, siglen, rsa);
+ i = RSA_public_decrypt((int)siglen,
+ sigbuf,rm,rsa,RSA_PKCS1_PADDING);
+ if (i <= 0)
+ return 0;
+ *prm_len = i;
+ return 1;
}
s=(unsigned char *)OPENSSL_malloc((unsigned int)siglen);
if (s == NULL)
{
- RSAerr(RSA_F_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
+ RSAerr(RSA_F_INT_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
goto err;
}
if((dtype == NID_md5_sha1) && (m_len != SSL_SIG_LENGTH) ) {
- RSAerr(RSA_F_RSA_VERIFY,RSA_R_INVALID_MESSAGE_LENGTH);
+ RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_INVALID_MESSAGE_LENGTH);
goto err;
}
i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING);
/* Special case: SSL signature */
if(dtype == NID_md5_sha1) {
if((i != SSL_SIG_LENGTH) || memcmp(s, m, SSL_SIG_LENGTH))
- RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
else ret = 1;
} else {
const unsigned char *p=s;
sig=d2i_X509_SIG(NULL,&p,(long)i);
if (sig == NULL) goto err;
+
+ /* Excess data can be used to create forgeries */
+ if(p != s+i)
+ {
+ RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ goto err;
+ }
+
+ /* Parameters to the signature algorithm can also be used to
+ create forgeries */
+ if(sig->algor->parameter
+ && ASN1_TYPE_get(sig->algor->parameter) != V_ASN1_NULL)
+ {
+ RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ goto err;
+ }
+
sigtype=OBJ_obj2nid(sig->algor->algorithm);
}
else
{
- RSAerr(RSA_F_RSA_VERIFY,
+ RSAerr(RSA_F_INT_RSA_VERIFY,
RSA_R_ALGORITHM_MISMATCH);
goto err;
}
}
- if ( ((unsigned int)sig->digest->length != m_len) ||
+ if (rm)
+ {
+ const EVP_MD *md;
+ md = EVP_get_digestbynid(dtype);
+ if (md && (EVP_MD_size(md) != sig->digest->length))
+ RSAerr(RSA_F_INT_RSA_VERIFY,
+ RSA_R_INVALID_DIGEST_LENGTH);
+ else
+ {
+ memcpy(rm, sig->digest->data,
+ sig->digest->length);
+ *prm_len = sig->digest->length;
+ ret = 1;
+ }
+ }
+ else if (((unsigned int)sig->digest->length != m_len) ||
(memcmp(m,sig->digest->data,m_len) != 0))
{
- RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
+ RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
}
else
ret=1;
return(ret);
}
+int RSA_verify(int dtype, const unsigned char *m, unsigned int m_len,
+ const unsigned char *sigbuf, unsigned int siglen,
+ RSA *rsa)
+ {
+
+ if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify)
+ {
+ return rsa->meth->rsa_verify(dtype, m, m_len,
+ sigbuf, siglen, rsa);
+ }
+
+ return int_rsa_verify(dtype, m, m_len, NULL, NULL, sigbuf, siglen, rsa);
+ }