Add sign/verify digest API to handle an explicit digest instead of finalising

[openssl.git] / fips / rsa / fips_rsa_sign.c

diff --git a/fips/rsa/fips_rsa_sign.c b/fips/rsa/fips_rsa_sign.c
index 4e5b4bf1db31fea152958559d744029f70a5f2be..e9f7a2bba7ff6fa53c5124da99145fa71c511441 100644 (file)
--- a/fips/rsa/fips_rsa_sign.c
+++ b/fips/rsa/fips_rsa_sign.c
@@ -191,38 +191,48 @@ static const unsigned char *fips_digestinfo_nn_encoding(int nid, unsigned int *l
                }
        }
 
-
 int FIPS_rsa_sign_ctx(RSA *rsa, EVP_MD_CTX *ctx,
                        int rsa_pad_mode, int saltlen, const EVP_MD *mgf1Hash,
                        unsigned char *sigret, unsigned int *siglen)
        {
+       unsigned int md_len, rv;
+       unsigned char md[EVP_MAX_MD_SIZE];
+        EVP_DigestFinal_ex(ctx, md, &md_len);
+       rv = FIPS_rsa_sign_digest(rsa, md, md_len,
+                                       M_EVP_MD_CTX_md(ctx),
+                                       rsa_pad_mode, saltlen,
+                                       mgf1Hash, sigret, siglen);
+       OPENSSL_cleanse(md, md_len);
+       return rv;
+       }
+
+
+int FIPS_rsa_sign_digest(RSA *rsa, const unsigned char *md, int md_len,
+                       const EVP_MD *mhash, int rsa_pad_mode, int saltlen,
+                       const EVP_MD *mgf1Hash,
+                       unsigned char *sigret, unsigned int *siglen)
+       {
        int i=0,j,ret=0;
        unsigned int dlen;
        const unsigned char *der;
-       unsigned int m_len;
-       const EVP_MD *mhash;
        int md_type;
        /* Largest DigestInfo: 19 (max encoding) + max MD */
        unsigned char tmpdinfo[19 + EVP_MAX_MD_SIZE];
-       unsigned char md[EVP_MAX_MD_SIZE + 1];
 
-        EVP_DigestFinal_ex(ctx, md, &m_len);
-
-       mhash = M_EVP_MD_CTX_md(ctx);
        md_type = M_EVP_MD_type(mhash);
 
        if (rsa_pad_mode == RSA_X931_PADDING)
                {
                int hash_id;
-               memcpy(tmpdinfo, md, m_len);
+               memcpy(tmpdinfo, md, md_len);
                hash_id = RSA_X931_hash_id(md_type);
                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;
+               tmpdinfo[md_len] = (unsigned char)hash_id;
+               i = md_len + 1;
                }
        else if (rsa_pad_mode == RSA_PKCS1_PADDING)
                {
@@ -235,9 +245,9 @@ int FIPS_rsa_sign_ctx(RSA *rsa, EVP_MD_CTX *ctx,
                        return 0;
                        }
                memcpy(tmpdinfo, der, dlen);
-               memcpy(tmpdinfo + dlen, md, m_len);
+               memcpy(tmpdinfo + dlen, md, md_len);
 
-               i = dlen + m_len;
+               i = dlen + md_len;
 
                }
        else if (rsa_pad_mode == RSA_PKCS1_PSS_PADDING)
@@ -260,7 +270,6 @@ int FIPS_rsa_sign_ctx(RSA *rsa, EVP_MD_CTX *ctx,
                        *siglen=j;
                        }
                psserr:
-               OPENSSL_cleanse(md,m_len);
                OPENSSL_cleanse(sbuf, i);
                OPENSSL_free(sbuf);
                return ret;
@@ -282,7 +291,6 @@ int FIPS_rsa_sign_ctx(RSA *rsa, EVP_MD_CTX *ctx,
 
        done:
        OPENSSL_cleanse(tmpdinfo,i);
-       OPENSSL_cleanse(md,m_len);
        return ret;
        }
 
@@ -290,12 +298,25 @@ int FIPS_rsa_verify_ctx(RSA *rsa, EVP_MD_CTX *ctx,
                        int rsa_pad_mode, int saltlen, const EVP_MD *mgf1Hash,
                        unsigned char *sigbuf, unsigned int siglen)
        {
+       unsigned int md_len, rv;
+       unsigned char md[EVP_MAX_MD_SIZE];
+        EVP_DigestFinal_ex(ctx, md, &md_len);
+       rv = FIPS_rsa_verify_digest(rsa, md, md_len, M_EVP_MD_CTX_md(ctx),
+                                       rsa_pad_mode, saltlen, mgf1Hash,
+                                       sigbuf, siglen);
+       OPENSSL_cleanse(md, md_len);
+       return rv;
+       }
+       
+int FIPS_rsa_verify_digest(RSA *rsa, const unsigned char *dig, int diglen,
+                       const EVP_MD *mhash, int rsa_pad_mode, int saltlen,
+                       const EVP_MD *mgf1Hash,
+                       unsigned char *sigbuf, unsigned int siglen)
+       {
        int i,ret=0;
-       unsigned int dlen, diglen;
+       unsigned int dlen;
        unsigned char *s;
        const unsigned char *der;
-       unsigned char dig[EVP_MAX_MD_SIZE];
-       const EVP_MD *mhash;
        int md_type;
        int rsa_dec_pad_mode;
 
@@ -305,11 +326,8 @@ int FIPS_rsa_verify_ctx(RSA *rsa, EVP_MD_CTX *ctx,
                return(0);
                }
 
-       mhash = M_EVP_MD_CTX_md(ctx);
        md_type = M_EVP_MD_type(mhash);
 
-        EVP_DigestFinal_ex(ctx, dig, &diglen);
-
        s= OPENSSL_malloc((unsigned int)siglen);
        if (s == NULL)
                {