/**
@fn int soap_smd_update(struct soap *soap, struct soap_smd_data *data, const char *buf, size_t len)
@brief Updates (signed) digest computation with message part.
@param soap context
@param[in,out] data smdevp engine context
@param[in] buf contains message part
@param[in] len of message part
@return SOAP_OK or SOAP_SSL_ERROR
*/
int
soap_smd_update(struct soap *soap, struct soap_smd_data *data, const char *buf, size_t len)
{ int ok = 1;
if (!data->ctx)
return soap_set_receiver_error(soap, "soap_smd_update() failed", "No context", SOAP_SSL_ERROR);
DBGLOG(TEST, SOAP_MESSAGE(fdebug, "-- SMD Update alg=%x n=%lu (%p) --\n", data->alg, (unsigned long)len, data->ctx));
switch (data->alg & SOAP_SMD_ALGO)
{ case SOAP_SMD_HMAC:
HMAC_Update((HMAC_CTX*)data->ctx, (const unsigned char*)buf, len);
break;
case SOAP_SMD_DGST:
EVP_DigestUpdate((EVP_MD_CTX*)data->ctx, (const void*)buf, (unsigned int)len);
break;
case SOAP_SMD_SIGN:
ok = EVP_SignUpdate((EVP_MD_CTX*)data->ctx, (const void*)buf, (unsigned int)len);
break;
case SOAP_SMD_VRFY:
ok = EVP_VerifyUpdate((EVP_MD_CTX*)data->ctx, (const void*)buf, (unsigned int)len);
break;
}
DBGMSG(TEST, buf, len);
DBGLOG(TEST, SOAP_MESSAGE(fdebug, "\n--"));
/* check and return */
return soap_smd_check(soap, data, ok, "soap_smd_update() failed");
}
/**
@fn int soap_smd_final(struct soap *soap, struct soap_smd_data *data, char *buf, int *len)
@brief Finalizes (signed) digest computation and returns digest or signature.
@param soap context
@param[in,out] data smdevp engine context
@param[in] buf contains signature for verification (SOAP_SMD_VRFY algorithms)
@param[out] buf is populated with the digest or signature
@param[in] len points to length of signature to verify (SOAP_SMD_VRFY algorithms)
@param[out] len points to length of stored digest or signature (pass NULL if you are not interested in this value)
@return SOAP_OK or SOAP_SSL_ERROR
*/
int
soap_smd_final(struct soap *soap, struct soap_smd_data *data, char *buf, int *len)
{ unsigned int n = 0;
int ok = 1;
if (!data->ctx)
return soap_set_receiver_error(soap, "soap_smd_final() failed", "No context", SOAP_SSL_ERROR);
if (buf)
{ /* finalize the digest or signature computation */
switch (data->alg & SOAP_SMD_ALGO)
{ case SOAP_SMD_HMAC:
HMAC_Final((HMAC_CTX*)data->ctx, (unsigned char*)buf, &n);
break;
case SOAP_SMD_DGST:
EVP_DigestFinal_ex((EVP_MD_CTX*)data->ctx, (unsigned char*)buf, &n);
break;
case SOAP_SMD_SIGN:
ok = EVP_SignFinal((EVP_MD_CTX*)data->ctx, (unsigned char*)buf, &n, (EVP_PKEY*)data->key);
break;
case SOAP_SMD_VRFY:
if (len)
{ n = (unsigned int)*len;
ok = EVP_VerifyFinal((EVP_MD_CTX*)data->ctx, (unsigned char*)buf, n, (EVP_PKEY*)data->key);
}
else
ok = 0;
break;
}
DBGLOG(TEST, SOAP_MESSAGE(fdebug, "-- SMD Final alg=%x (%p) %d bytes--\n", data->alg, data->ctx, n));
DBGHEX(TEST, buf, n);
DBGLOG(TEST, SOAP_MESSAGE(fdebug, "\n--"));
/* pass back length of digest or signature produced */
if (len)
*len = (int)n;
}
/* cleanup */
if ((data->alg & SOAP_SMD_ALGO) == SOAP_SMD_HMAC)
HMAC_CTX_cleanup((HMAC_CTX*)data->ctx);
else
EVP_MD_CTX_cleanup((EVP_MD_CTX*)data->ctx);
SOAP_FREE(soap, data->ctx);
data->ctx = NULL;
/* check and return */
return soap_smd_check(soap, data, ok, "soap_smd_final() failed");
}
/**
@fn int soap_smd_check(struct soap *soap, struct soap_smd_data *data, int err, const char *msg)
@brief Check result of init/update/final smdevp engine operations.
@param soap context
@param[in,out] data smdevp engine context
@param[in] err EVP error value
@param[in] msg error message
@return SOAP_OK or SOAP_SSL_ERROR
*/
static int
soap_smd_check(struct soap *soap, struct soap_smd_data *data, int err, const char *msg)
{ if (err <= 0)
{ unsigned long r;
while ((r = ERR_get_error()))
{ ERR_error_string_n(r, soap->msgbuf, sizeof(soap->msgbuf));
DBGLOG(TEST, SOAP_MESSAGE(fdebug, "-- SMD Error (%d) %s: %s\n", err, msg, soap->msgbuf));
}
if (data->ctx)
{ if ((data->alg & (SOAP_SMD_PASSTHRU-1)) == SOAP_SMD_HMAC_SHA1)
HMAC_CTX_cleanup((HMAC_CTX*)data->ctx);
else
EVP_MD_CTX_cleanup((EVP_MD_CTX*)data->ctx);
SOAP_FREE(soap, data->ctx);
data->ctx = NULL;
}
return soap_set_receiver_error(soap, msg, soap->msgbuf, SOAP_SSL_ERROR);
}
return SOAP_OK;
}
/**
@fn int soap_mec_init(struct soap *soap, struct soap_mec_data *data, int alg, SOAP_MEC_KEY_TYPE *pkey, unsigned char *key, int *keylen)
@brief Initialize mecevp engine state and create context for
encryption/decryption algorithm using a private/public key or symmetric secret
key.
@param soap context
@param[in,out] data mecevp engine context
@param[in] alg encryption/decryption algorithm
@param[in] pkey public/private key or NULL
@param[in,out] key secret key or encrypted ephemeral secret key set with envelope encryption, or NULL
@param[in,out] keylen secret key length
@return SOAP_OK or SOAP_SSL_ERROR
*/
int
soap_mec_init(struct soap *soap, struct soap_mec_data *data, int alg, SOAP_MEC_KEY_TYPE *pkey, unsigned char *key, int *keylen)
{ int ok = 1;
DBGLOG(TEST, SOAP_MESSAGE(fdebug, "soap_mec_init()\n"));
soap_ssl_init();
data->ctx = (EVP_CIPHER_CTX*)SOAP_MALLOC(soap, sizeof(EVP_CIPHER_CTX));
if (!data->ctx)
return soap->error = SOAP_EOM;
EVP_CIPHER_CTX_init(data->ctx);
data->alg = alg;
data->state = SOAP_MEC_STATE_NONE;
if (alg & SOAP_MEC_DES_CBC)
data->type = EVP_des_ede3_cbc(); /* triple DES CBC */
else if (alg & SOAP_MEC_AES128_CBC)
data->type = EVP_get_cipherbyname("AES128");
else if (alg & SOAP_MEC_AES192_CBC)
data->type = EVP_get_cipherbyname("AES192");
else if (alg & SOAP_MEC_AES256_CBC)
data->type = EVP_get_cipherbyname("AES256");
else if (alg & SOAP_MEC_AES512_CBC)
data->type = EVP_get_cipherbyname("AES512");
else
data->type = EVP_enc_null();
data->buf = NULL;
data->rest = NULL;
data->restlen = 0;
if (alg & SOAP_MEC_ENC)
{ if (!data->type)
return soap_mec_check(soap, data, 0, "soap_mec_init() failed: cannot load cipher");
EVP_EncryptInit_ex(data->ctx, data->type, NULL, NULL, NULL);
}
if (alg & SOAP_MEC_OAEP)
EVP_CIPHER_CTX_set_padding(data->ctx, RSA_PKCS1_OAEP_PADDING);
else
EVP_CIPHER_CTX_set_padding(data->ctx, RSA_PKCS1_PADDING);
switch (alg & SOAP_MEC_MASK)
{ case SOAP_MEC_ENV_ENC_AES128_CBC:
case SOAP_MEC_ENV_ENC_AES192_CBC:
case SOAP_MEC_ENV_ENC_AES256_CBC:
case SOAP_MEC_ENV_ENC_AES512_CBC:
case SOAP_MEC_ENV_ENC_DES_CBC:
ok = EVP_CIPHER_CTX_rand_key(data->ctx, data->ekey);
/* generate ephemeral secret key */
#if (OPENSSL_VERSION_NUMBER >= 0x01000000L)
*keylen = EVP_PKEY_encrypt_old(key, data->ekey, EVP_CIPHER_CTX_key_length(data->ctx), pkey);
#else
*keylen = EVP_PKEY_encrypt(key, data->ekey, EVP_CIPHER_CTX_key_length(data->ctx), pkey);
#endif
key = data->ekey;
/* fall through to next arm */
case SOAP_MEC_ENC_DES_CBC:
case SOAP_MEC_ENC_AES128_CBC:
case SOAP_MEC_ENC_AES192_CBC:
case SOAP_MEC_ENC_AES256_CBC:
case SOAP_MEC_ENC_AES512_CBC:
data->bufidx = 0;
data->buflen = 1024; /* > iv in base64 must fit */
data->buf = (char*)SOAP_MALLOC(soap, data->buflen);
data->key = key;
break;
case SOAP_MEC_ENV_DEC_AES128_CBC:
case SOAP_MEC_ENV_DEC_AES192_CBC:
case SOAP_MEC_ENV_DEC_AES256_CBC:
case SOAP_MEC_ENV_DEC_AES512_CBC:
case SOAP_MEC_ENV_DEC_DES_CBC:
case SOAP_MEC_DEC_DES_CBC:
case SOAP_MEC_DEC_AES128_CBC:
case SOAP_MEC_DEC_AES192_CBC:
case SOAP_MEC_DEC_AES256_CBC:
case SOAP_MEC_DEC_AES512_CBC:
data->pkey = pkey;
data->key = key;
data->keylen = *keylen;
break;
default:
return soap_set_receiver_error(soap, "Unsupported encryption algorithm", NULL, SOAP_SSL_ERROR);
}
return soap_mec_check(soap, data, ok, "soap_mec_init() failed");
}
/**
@fn int soap_smd_init(struct soap *soap, struct soap_smd_data *data, int alg, const void *key, int keylen)
@brief Initiates a (signed) digest computation.
@param soap context
@param[in,out] data smdevp engine context
@param[in] alg is algorithm to use
@param[in] key is key to use or NULL for digests
@param[in] keylen is length of HMAC key (when provided)
@return SOAP_OK or SOAP_SSL_ERROR
*/
int
soap_smd_init(struct soap *soap, struct soap_smd_data *data, int alg, const void *key, int keylen)
{ int ok = 1;
const EVP_MD *type;
soap_ssl_init();
/* the algorithm to use */
data->alg = alg;
/* the key to use */
data->key = key;
/* allocate and init the OpenSSL HMAC or EVP_MD context */
if ((alg & SOAP_SMD_ALGO) == SOAP_SMD_HMAC)
{ data->ctx = (void*)SOAP_MALLOC(soap, sizeof(HMAC_CTX));
if (!data->ctx)
return soap_set_receiver_error(soap, "soap_smd_init() failed", "No context", SOAP_SSL_ERROR);
HMAC_CTX_init((HMAC_CTX*)data->ctx);
}
else
{ data->ctx = (void*)SOAP_MALLOC(soap, sizeof(EVP_MD_CTX));
if (!data->ctx)
return soap_set_receiver_error(soap, "soap_smd_init() failed", "No context", SOAP_SSL_ERROR);
EVP_MD_CTX_init((EVP_MD_CTX*)data->ctx);
}
DBGLOG(TEST, SOAP_MESSAGE(fdebug, "-- SMD Init alg=%x (%p) --\n", alg, data->ctx));
/* init the digest or signature computations */
switch (alg & SOAP_SMD_HASH)
{ case SOAP_SMD_MD5:
type = EVP_md5();
break;
case SOAP_SMD_SHA1:
type = EVP_sha1();
break;
#if (OPENSSL_VERSION_NUMBER >= 0x0090800fL)
case SOAP_SMD_SHA224:
type = EVP_sha224();
break;
case SOAP_SMD_SHA256:
type = EVP_sha256();
break;
case SOAP_SMD_SHA384:
type = EVP_sha384();
break;
case SOAP_SMD_SHA512:
type = EVP_sha512();
break;
#endif
default:
return soap_smd_check(soap, data, 0, "soap_smd_init() failed: cannot load digest");
}
switch (alg & SOAP_SMD_ALGO)
{ case SOAP_SMD_HMAC:
HMAC_Init((HMAC_CTX*)data->ctx, key, keylen, type);
break;
case SOAP_SMD_DGST:
EVP_DigestInit((EVP_MD_CTX*)data->ctx, type);
break;
case SOAP_SMD_SIGN:
ok = EVP_SignInit((EVP_MD_CTX*)data->ctx, type);
break;
case SOAP_SMD_VRFY:
ok = EVP_VerifyInit((EVP_MD_CTX*)data->ctx, type);
break;
default:
return soap_set_receiver_error(soap, "Unsupported digest algorithm", NULL, SOAP_SSL_ERROR);
}
/* check and return */
return soap_smd_check(soap, data, ok, "soap_smd_init() failed");
}