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Code Issues Releases Activity

Make libbsnmp buildable.

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This commit is contained in:
Jung-uk Kim 2018-09-19 06:39:10 +00:00
parent ff73837b94
commit d66820f2c8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/projects/openssl111/; revision=338769
1 changed files with 81 additions and 48 deletions
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129
contrib/bsnmp/lib/snmpcrypto.c
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@ -94,9 +94,14 @@ snmp_pdu_calc_digest(const struct snmp_pdu *pdu, uint8_t *digest)
uint32_t i, keylen, olen;
int32_t err;
const EVP_MD *dtype;
EVP_MD_CTX ctx;
EVP_MD_CTX *ctx;
err = snmp_digest_init(&pdu->user, &ctx, &dtype, &keylen);
ctx = EVP_MD_CTX_new();
if (ctx == NULL)
return (SNMP_CODE_FAILED);
err = snmp_digest_init(&pdu->user, ctx, &dtype, &keylen);
if (err <= 0)
EVP_MD_CTX_free(ctx);
if (err < 0)
return (SNMP_CODE_BADDIGEST);
else if (err == 0)
@ -111,29 +116,29 @@ snmp_pdu_calc_digest(const struct snmp_pdu *pdu, uint8_t *digest)
key2[i] = extkey[i] ^ opad;
}
if (EVP_DigestUpdate(&ctx, key1, SNMP_EXTENDED_KEY_SIZ) != 1 ||
EVP_DigestUpdate(&ctx, pdu->outer_ptr, pdu->outer_len) != 1 ||
EVP_DigestFinal(&ctx, md, &olen) != 1)
if (EVP_DigestUpdate(ctx, key1, SNMP_EXTENDED_KEY_SIZ) != 1 ||
EVP_DigestUpdate(ctx, pdu->outer_ptr, pdu->outer_len) != 1 ||
EVP_DigestFinal(ctx, md, &olen) != 1)
goto failed;
if (EVP_DigestInit(&ctx, dtype) != 1 ||
EVP_DigestUpdate(&ctx, key2, SNMP_EXTENDED_KEY_SIZ) != 1 ||
EVP_DigestUpdate(&ctx, md, olen) != 1 ||
EVP_DigestFinal(&ctx, md, &olen) != 1)
if (EVP_DigestInit(ctx, dtype) != 1 ||
EVP_DigestUpdate(ctx, key2, SNMP_EXTENDED_KEY_SIZ) != 1 ||
EVP_DigestUpdate(ctx, md, olen) != 1 ||
EVP_DigestFinal(ctx, md, &olen) != 1)
goto failed;
if (olen < SNMP_USM_AUTH_SIZE) {
snmp_error("bad digest size - %d", olen);
EVP_MD_CTX_cleanup(&ctx);
EVP_MD_CTX_free(ctx);
return (SNMP_CODE_BADDIGEST);
}
memcpy(digest, md, SNMP_USM_AUTH_SIZE);
EVP_MD_CTX_cleanup(&ctx);
EVP_MD_CTX_free(ctx);
return (SNMP_CODE_OK);
failed:
EVP_MD_CTX_cleanup(&ctx);
EVP_MD_CTX_free(ctx);
return (SNMP_CODE_BADDIGEST);
}
@ -176,7 +181,7 @@ snmp_pdu_encrypt(const struct snmp_pdu *pdu)
int32_t err, olen;
uint8_t iv[SNMP_PRIV_AES_IV_SIZ];
const EVP_CIPHER *ctype;
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX *ctx;
err = snmp_pdu_cipher_init(pdu, pdu->scoped_len, &ctype, iv);
if (err < 0)
@ -184,18 +189,23 @@ snmp_pdu_encrypt(const struct snmp_pdu *pdu)
else if (err == 0)
return (SNMP_CODE_OK);
if (EVP_EncryptInit(&ctx, ctype, pdu->user.priv_key, iv) != 1)
ctx = EVP_CIPHER_CTX_new();
if (ctx == NULL)
return (SNMP_CODE_FAILED);
if (EVP_EncryptInit(ctx, ctype, pdu->user.priv_key, iv) != 1)
goto failed;
if (EVP_EncryptUpdate(&ctx, pdu->scoped_ptr, &olen, pdu->scoped_ptr,
if (EVP_EncryptUpdate(ctx, pdu->scoped_ptr, &olen, pdu->scoped_ptr,
pdu->scoped_len) != 1 ||
EVP_EncryptFinal(&ctx, pdu->scoped_ptr + olen, &olen) != 1) {
EVP_CIPHER_CTX_cleanup(&ctx);
return (SNMP_CODE_FAILED);
}
EVP_EncryptFinal(ctx, pdu->scoped_ptr + olen, &olen) != 1)
goto failed;
EVP_CIPHER_CTX_cleanup(&ctx);
EVP_CIPHER_CTX_free(ctx);
return (SNMP_CODE_OK);
failed:
EVP_CIPHER_CTX_free(ctx);
return (SNMP_CODE_FAILED);
}
enum snmp_code
@ -204,7 +214,7 @@ snmp_pdu_decrypt(const struct snmp_pdu *pdu)
int32_t err, olen;
uint8_t iv[SNMP_PRIV_AES_IV_SIZ];
const EVP_CIPHER *ctype;
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX *ctx;
err = snmp_pdu_cipher_init(pdu, pdu->scoped_len, &ctype, iv);
if (err < 0)
@ -212,19 +222,24 @@ snmp_pdu_decrypt(const struct snmp_pdu *pdu)
else if (err == 0)
return (SNMP_CODE_OK);
if (EVP_DecryptInit(&ctx, ctype, pdu->user.priv_key, iv) != 1 ||
EVP_CIPHER_CTX_set_padding(&ctx, 0) != 1)
return (SNMP_CODE_EDECRYPT);
ctx = EVP_CIPHER_CTX_new();
if (ctx == NULL)
return (SNMP_CODE_FAILED);
if (EVP_DecryptInit(ctx, ctype, pdu->user.priv_key, iv) != 1 ||
EVP_CIPHER_CTX_set_padding(ctx, 0) != 1)
goto failed;
if (EVP_DecryptUpdate(&ctx, pdu->scoped_ptr, &olen, pdu->scoped_ptr,
if (EVP_DecryptUpdate(ctx, pdu->scoped_ptr, &olen, pdu->scoped_ptr,
pdu->scoped_len) != 1 ||
EVP_DecryptFinal(&ctx, pdu->scoped_ptr + olen, &olen) != 1) {
EVP_CIPHER_CTX_cleanup(&ctx);
return (SNMP_CODE_EDECRYPT);
}
EVP_DecryptFinal(ctx, pdu->scoped_ptr + olen, &olen) != 1)
goto failed;
EVP_CIPHER_CTX_cleanup(&ctx);
EVP_CIPHER_CTX_free(ctx);
return (SNMP_CODE_OK);
failed:
EVP_CIPHER_CTX_free(ctx);
return (SNMP_CODE_EDECRYPT);
}
/* [RFC 3414] - A.2. Password to Key Algorithm */
@ -234,13 +249,19 @@ snmp_passwd_to_keys(struct snmp_user *user, char *passwd)
int err, loop, i, pwdlen;
uint32_t keylen, olen;
const EVP_MD *dtype;
EVP_MD_CTX ctx;
EVP_MD_CTX *ctx;
uint8_t authbuf[SNMP_AUTH_BUF_SIZE];
if (passwd == NULL || user == NULL)
return (SNMP_CODE_FAILED);
err = snmp_digest_init(user, &ctx, &dtype, &keylen);
ctx = EVP_MD_CTX_new();
if (ctx == NULL)
return (SNMP_CODE_FAILED);
err = snmp_digest_init(user, ctx, &dtype, &keylen);
if (err <= 0)
EVP_MD_CTX_free(ctx);
if (err < 0)
return (SNMP_CODE_BADDIGEST);
else if (err == 0)
@ -252,18 +273,18 @@ snmp_passwd_to_keys(struct snmp_user *user, char *passwd)
for (loop = 0; loop < SNMP_AUTH_KEY_LOOPCNT; loop += i) {
for (i = 0; i < SNMP_EXTENDED_KEY_SIZ; i++)
authbuf[i] = passwd[(loop + i) % pwdlen];
if (EVP_DigestUpdate(&ctx, authbuf, SNMP_EXTENDED_KEY_SIZ) != 1)
if (EVP_DigestUpdate(ctx, authbuf, SNMP_EXTENDED_KEY_SIZ) != 1)
goto failed;
}
if (EVP_DigestFinal(&ctx, user->auth_key, &olen) != 1)
if (EVP_DigestFinal(ctx, user->auth_key, &olen) != 1)
goto failed;
EVP_MD_CTX_cleanup(&ctx);
EVP_MD_CTX_free(ctx);
return (SNMP_CODE_OK);
failed:
EVP_MD_CTX_cleanup(&ctx);
EVP_MD_CTX_free(ctx);
return (SNMP_CODE_BADDIGEST);
}
@ -274,16 +295,22 @@ snmp_get_local_keys(struct snmp_user *user, uint8_t *eid, uint32_t elen)
int err;
uint32_t keylen, olen;
const EVP_MD *dtype;
EVP_MD_CTX ctx;
EVP_MD_CTX *ctx;
uint8_t authbuf[SNMP_AUTH_BUF_SIZE];
if (user == NULL || eid == NULL || elen > SNMP_ENGINE_ID_SIZ)
return (SNMP_CODE_FAILED);
ctx = EVP_MD_CTX_new();
if (ctx == NULL)
return (SNMP_CODE_FAILED);
memset(user->priv_key, 0, sizeof(user->priv_key));
memset(authbuf, 0, sizeof(authbuf));
err = snmp_digest_init(user, &ctx, &dtype, &keylen);
err = snmp_digest_init(user, ctx, &dtype, &keylen);
if (err <= 0)
EVP_MD_CTX_free(ctx);
if (err < 0)
return (SNMP_CODE_BADDIGEST);
else if (err == 0)
@ -293,12 +320,12 @@ snmp_get_local_keys(struct snmp_user *user, uint8_t *eid, uint32_t elen)
memcpy(authbuf + keylen, eid, elen);
memcpy(authbuf + keylen + elen, user->auth_key, keylen);
if (EVP_DigestUpdate(&ctx, authbuf, 2 * keylen + elen) != 1 ||
EVP_DigestFinal(&ctx, user->auth_key, &olen) != 1) {
EVP_MD_CTX_cleanup(&ctx);
if (EVP_DigestUpdate(ctx, authbuf, 2 * keylen + elen) != 1 ||
EVP_DigestFinal(ctx, user->auth_key, &olen) != 1) {
EVP_MD_CTX_free(ctx);
return (SNMP_CODE_BADDIGEST);
}
EVP_MD_CTX_cleanup(&ctx);
EVP_MD_CTX_free(ctx);
if (user->priv_proto != SNMP_PRIV_NOPRIV)
memcpy(user->priv_key, user->auth_key, sizeof(user->priv_key));
@ -312,9 +339,15 @@ snmp_calc_keychange(struct snmp_user *user, uint8_t *keychange)
int32_t err, rvalue[SNMP_AUTH_HMACSHA_KEY_SIZ / 4];
uint32_t i, keylen, olen;
const EVP_MD *dtype;
EVP_MD_CTX ctx;
EVP_MD_CTX *ctx;
err = snmp_digest_init(user, &ctx, &dtype, &keylen);
ctx = EVP_MD_CTX_new();
if (ctx == NULL)
return (SNMP_CODE_FAILED);
err = snmp_digest_init(user, ctx, &dtype, &keylen);
if (err <= 0)
EVP_MD_CTX_free(ctx);
if (err < 0)
return (SNMP_CODE_BADDIGEST);
else if (err == 0)
@ -326,13 +359,13 @@ snmp_calc_keychange(struct snmp_user *user, uint8_t *keychange)
memcpy(keychange, user->auth_key, keylen);
memcpy(keychange + keylen, rvalue, keylen);
if (EVP_DigestUpdate(&ctx, keychange, 2 * keylen) != 1 ||
EVP_DigestFinal(&ctx, keychange, &olen) != 1) {
EVP_MD_CTX_cleanup(&ctx);
if (EVP_DigestUpdate(ctx, keychange, 2 * keylen) != 1 ||
EVP_DigestFinal(ctx, keychange, &olen) != 1) {
EVP_MD_CTX_free(ctx);
return (SNMP_CODE_BADDIGEST);
}
EVP_MD_CTX_cleanup(&ctx);
EVP_MD_CTX_free(ctx);
return (SNMP_CODE_OK);
}