#include <string.h>
#include <openssl/evp.h>
#include <openssl/rsa.h>
#include <openssl/err.h>
#include <openssl/sha.h>
#ifdef OPENSSL_FIPS
static const unsigned char sha1_bin[] = {
0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05,
0x00, 0x04, 0x14
};
static const unsigned char sha224_bin[] = {
0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x04, 0x05, 0x00, 0x04, 0x1c
};
static const unsigned char sha256_bin[] = {
0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20
};
static const unsigned char sha384_bin[] = {
0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x02, 0x05, 0x00, 0x04, 0x30
};
static const unsigned char sha512_bin[] = {
0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40
};
static unsigned char sha1_nn_bin[] = {
0x30, 0x1f, 0x30, 0x07, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x04,
0x14
};
static unsigned char sha224_nn_bin[] = {
0x30, 0x2b, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x04, 0x04, 0x1c
};
static unsigned char sha256_nn_bin[] = {
0x30, 0x2f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x01, 0x04, 0x20
};
static unsigned char sha384_nn_bin[] = {
0x30, 0x3f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x02, 0x04, 0x30
};
static unsigned char sha512_nn_bin[] = {
0x30, 0x4f, 0x30, 0x0b, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x03, 0x04, 0x40
};
static const unsigned char *fips_digestinfo_encoding(int nid, unsigned int *len)
{
switch (nid)
{
case NID_sha1:
*len = sizeof(sha1_bin);
return sha1_bin;
case NID_sha224:
*len = sizeof(sha224_bin);
return sha224_bin;
case NID_sha256:
*len = sizeof(sha256_bin);
return sha256_bin;
case NID_sha384:
*len = sizeof(sha384_bin);
return sha384_bin;
case NID_sha512:
*len = sizeof(sha512_bin);
return sha512_bin;
default:
return NULL;
}
}
static const unsigned char *fips_digestinfo_nn_encoding(int nid, unsigned int *len)
{
switch (nid)
{
case NID_sha1:
*len = sizeof(sha1_nn_bin);
return sha1_nn_bin;
case NID_sha224:
*len = sizeof(sha224_nn_bin);
return sha224_nn_bin;
case NID_sha256:
*len = sizeof(sha256_nn_bin);
return sha256_nn_bin;
case NID_sha384:
*len = sizeof(sha384_nn_bin);
return sha384_nn_bin;
case NID_sha512:
*len = sizeof(sha512_nn_bin);
return sha512_nn_bin;
default:
return NULL;
}
}
static int fips_rsa_sign(int type, const unsigned char *x, unsigned int y,
unsigned char *sigret, unsigned int *siglen, EVP_MD_SVCTX *sv)
{
int i=0,j,ret=0;
unsigned int dlen;
const unsigned char *der;
unsigned int m_len;
int pad_mode = sv->mctx->flags & EVP_MD_CTX_FLAG_PAD_MASK;
int rsa_pad_mode = 0;
RSA *rsa = sv->key;
unsigned char tmpdinfo[19 + EVP_MAX_MD_SIZE];
unsigned char md[EVP_MAX_MD_SIZE + 1];
EVP_DigestFinal_ex(sv->mctx, md, &m_len);
if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_sign)
{
ret = rsa->meth->rsa_sign(type, md, m_len,
sigret, siglen, rsa);
goto done;
}
if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
{
int hash_id;
memcpy(tmpdinfo, md, m_len);
hash_id = RSA_X931_hash_id(M_EVP_MD_CTX_type(sv->mctx));
if (hash_id == -1)
{
RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
return 0;
}
tmpdinfo[m_len] = (unsigned char)hash_id;
i = m_len + 1;
rsa_pad_mode = RSA_X931_PADDING;
}
else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
{
der = fips_digestinfo_encoding(type, &dlen);
if (!der)
{
RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
return 0;
}
memcpy(tmpdinfo, der, dlen);
memcpy(tmpdinfo + dlen, md, m_len);
i = dlen + m_len;
rsa_pad_mode = RSA_PKCS1_PADDING;
}
else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
{
unsigned char *sbuf;
int saltlen;
i = RSA_size(rsa);
sbuf = OPENSSL_malloc(RSA_size(rsa));
saltlen = M_EVP_MD_CTX_FLAG_PSS_SALT(sv->mctx);
if (saltlen == EVP_MD_CTX_FLAG_PSS_MDLEN)
saltlen = -1;
else if (saltlen == EVP_MD_CTX_FLAG_PSS_MREC)
saltlen = -2;
if (!sbuf)
{
RSAerr(RSA_F_FIPS_RSA_SIGN,ERR_R_MALLOC_FAILURE);
goto psserr;
}
if (!RSA_padding_add_PKCS1_PSS(rsa, sbuf, md,
M_EVP_MD_CTX_md(sv->mctx), saltlen))
goto psserr;
j=rsa->meth->rsa_priv_enc(i,sbuf,sigret,rsa,RSA_NO_PADDING);
if (j > 0)
{
ret=1;
*siglen=j;
}
psserr:
OPENSSL_cleanse(md,m_len);
OPENSSL_cleanse(sbuf, i);
OPENSSL_free(sbuf);
return ret;
}
j=RSA_size(rsa);
if (i > (j-RSA_PKCS1_PADDING_SIZE))
{
RSAerr(RSA_F_FIPS_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
goto done;
}
j=rsa->meth->rsa_priv_enc(i,tmpdinfo,sigret,rsa,rsa_pad_mode);
if (j > 0)
{
ret=1;
*siglen=j;
}
done:
OPENSSL_cleanse(tmpdinfo,i);
OPENSSL_cleanse(md,m_len);
return ret;
}
static int fips_rsa_verify(int dtype,
const unsigned char *x, unsigned int y,
unsigned char *sigbuf, unsigned int siglen, EVP_MD_SVCTX *sv)
{
int i,ret=0;
unsigned int dlen, diglen;
int pad_mode = sv->mctx->flags & EVP_MD_CTX_FLAG_PAD_MASK;
int rsa_pad_mode = 0;
unsigned char *s;
const unsigned char *der;
unsigned char dig[EVP_MAX_MD_SIZE];
RSA *rsa = sv->key;
if (siglen != (unsigned int)RSA_size(sv->key))
{
RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
return(0);
}
EVP_DigestFinal_ex(sv->mctx, dig, &diglen);
if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify)
{
return rsa->meth->rsa_verify(dtype, dig, diglen,
sigbuf, siglen, rsa);
}
s= OPENSSL_malloc((unsigned int)siglen);
if (s == NULL)
{
RSAerr(RSA_F_FIPS_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
goto err;
}
if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
rsa_pad_mode = RSA_X931_PADDING;
else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
rsa_pad_mode = RSA_PKCS1_PADDING;
else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
rsa_pad_mode = RSA_NO_PADDING;
i=rsa->meth->rsa_pub_dec((int)siglen,sigbuf,s, rsa, rsa_pad_mode);
if (i <= 0) goto err;
if (pad_mode == EVP_MD_CTX_FLAG_PAD_X931)
{
int hash_id;
if (i != (int)(diglen + 1))
{
RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
goto err;
}
hash_id = RSA_X931_hash_id(M_EVP_MD_CTX_type(sv->mctx));
if (hash_id == -1)
{
RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_UNKNOWN_ALGORITHM_TYPE);
goto err;
}
if (s[diglen] != (unsigned char)hash_id)
{
RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
goto err;
}
if (memcmp(s, dig, diglen))
{
RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
goto err;
}
ret = 1;
}
else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PKCS1)
{
der = fips_digestinfo_encoding(dtype, &dlen);
if (!der)
{
RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_UNKNOWN_ALGORITHM_TYPE);
return(0);
}
if (i != (int)(dlen + diglen))
der = fips_digestinfo_nn_encoding(dtype, &dlen);
if ((i != (int)(dlen + diglen)) || memcmp(der, s, dlen)
|| memcmp(s + dlen, dig, diglen))
{
RSAerr(RSA_F_FIPS_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
goto err;
}
ret = 1;
}
else if (pad_mode == EVP_MD_CTX_FLAG_PAD_PSS)
{
int saltlen;
saltlen = M_EVP_MD_CTX_FLAG_PSS_SALT(sv->mctx);
if (saltlen == EVP_MD_CTX_FLAG_PSS_MDLEN)
saltlen = -1;
else if (saltlen == EVP_MD_CTX_FLAG_PSS_MREC)
saltlen = -2;
ret = RSA_verify_PKCS1_PSS(rsa, dig, M_EVP_MD_CTX_md(sv->mctx),
s, saltlen);
if (ret < 0)
ret = 0;
}
err:
if (s != NULL)
{
OPENSSL_cleanse(s, siglen);
OPENSSL_free(s);
}
return(ret);
}
#define EVP_PKEY_RSA_fips_method \
(evp_sign_method *)fips_rsa_sign, \
(evp_verify_method *)fips_rsa_verify, \
{EVP_PKEY_RSA,EVP_PKEY_RSA2,0,0}
static int init(EVP_MD_CTX *ctx)
{ return SHA1_Init(ctx->md_data); }
static int update(EVP_MD_CTX *ctx,const void *data,size_t count)
{ return SHA1_Update(ctx->md_data,data,count); }
static int final(EVP_MD_CTX *ctx,unsigned char *md)
{ return SHA1_Final(md,ctx->md_data); }
static const EVP_MD sha1_md=
{
NID_sha1,
NID_sha1WithRSAEncryption,
SHA_DIGEST_LENGTH,
EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
init,
update,
final,
NULL,
NULL,
EVP_PKEY_RSA_fips_method,
SHA_CBLOCK,
sizeof(EVP_MD *)+sizeof(SHA_CTX),
};
const EVP_MD *EVP_sha1(void)
{
return(&sha1_md);
}
static int init224(EVP_MD_CTX *ctx)
{ return SHA224_Init(ctx->md_data); }
static int init256(EVP_MD_CTX *ctx)
{ return SHA256_Init(ctx->md_data); }
static int update256(EVP_MD_CTX *ctx,const void *data,size_t count)
{ return SHA256_Update(ctx->md_data,data,count); }
static int final256(EVP_MD_CTX *ctx,unsigned char *md)
{ return SHA256_Final(md,ctx->md_data); }
static const EVP_MD sha224_md=
{
NID_sha224,
NID_sha224WithRSAEncryption,
SHA224_DIGEST_LENGTH,
EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
init224,
update256,
final256,
NULL,
NULL,
EVP_PKEY_RSA_fips_method,
SHA256_CBLOCK,
sizeof(EVP_MD *)+sizeof(SHA256_CTX),
};
const EVP_MD *EVP_sha224(void)
{ return(&sha224_md); }
static const EVP_MD sha256_md=
{
NID_sha256,
NID_sha256WithRSAEncryption,
SHA256_DIGEST_LENGTH,
EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
init256,
update256,
final256,
NULL,
NULL,
EVP_PKEY_RSA_fips_method,
SHA256_CBLOCK,
sizeof(EVP_MD *)+sizeof(SHA256_CTX),
};
const EVP_MD *EVP_sha256(void)
{ return(&sha256_md); }
static int init384(EVP_MD_CTX *ctx)
{ return SHA384_Init(ctx->md_data); }
static int init512(EVP_MD_CTX *ctx)
{ return SHA512_Init(ctx->md_data); }
static int update512(EVP_MD_CTX *ctx,const void *data,size_t count)
{ return SHA512_Update(ctx->md_data,data,count); }
static int final512(EVP_MD_CTX *ctx,unsigned char *md)
{ return SHA512_Final(md,ctx->md_data); }
static const EVP_MD sha384_md=
{
NID_sha384,
NID_sha384WithRSAEncryption,
SHA384_DIGEST_LENGTH,
EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
init384,
update512,
final512,
NULL,
NULL,
EVP_PKEY_RSA_fips_method,
SHA512_CBLOCK,
sizeof(EVP_MD *)+sizeof(SHA512_CTX),
};
const EVP_MD *EVP_sha384(void)
{ return(&sha384_md); }
static const EVP_MD sha512_md=
{
NID_sha512,
NID_sha512WithRSAEncryption,
SHA512_DIGEST_LENGTH,
EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX,
init512,
update512,
final512,
NULL,
NULL,
EVP_PKEY_RSA_fips_method,
SHA512_CBLOCK,
sizeof(EVP_MD *)+sizeof(SHA512_CTX),
};
const EVP_MD *EVP_sha512(void)
{ return(&sha512_md); }
#endif