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Coverity CID 1444960: Error handling issues

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Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8888)
This commit is contained in:
Pauli 2019-05-07 10:42:58 +10:00
parent ea053ec99e
commit a05bf83c79
4 changed files with 17 additions and 6 deletions
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1
crypto/err/openssl.txt
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@ -2400,6 +2400,7 @@ EVP_R_INPUT_NOT_INITIALIZED:111:input not initialized
EVP_R_INVALID_CUSTOM_LENGTH:185:invalid custom length EVP_R_INVALID_CUSTOM_LENGTH:185:invalid custom length
EVP_R_INVALID_DIGEST:152:invalid digest EVP_R_INVALID_DIGEST:152:invalid digest
EVP_R_INVALID_FIPS_MODE:168:invalid fips mode EVP_R_INVALID_FIPS_MODE:168:invalid fips mode
EVP_R_INVALID_IV_LENGTH:194:invalid iv length
EVP_R_INVALID_KEY:163:invalid key EVP_R_INVALID_KEY:163:invalid key
EVP_R_INVALID_KEY_LENGTH:130:invalid key length EVP_R_INVALID_KEY_LENGTH:130:invalid key length
EVP_R_INVALID_OPERATION:148:invalid operation EVP_R_INVALID_OPERATION:148:invalid operation

1
crypto/evp/evp_err.c
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@ -249,6 +249,7 @@ static const ERR_STRING_DATA EVP_str_reasons[] = {
"invalid custom length"}, "invalid custom length"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_DIGEST), "invalid digest"}, {ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_DIGEST), "invalid digest"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_FIPS_MODE), "invalid fips mode"}, {ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_FIPS_MODE), "invalid fips mode"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_IV_LENGTH), "invalid iv length"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_KEY), "invalid key"}, {ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_KEY), "invalid key"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_KEY_LENGTH), "invalid key length"}, {ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_KEY_LENGTH), "invalid key length"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_OPERATION), "invalid operation"}, {ERR_PACK(ERR_LIB_EVP, 0, EVP_R_INVALID_OPERATION), "invalid operation"},

20
crypto/evp/p5_crpt.c
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@ -28,7 +28,7 @@ int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
EVP_MD_CTX *ctx; EVP_MD_CTX *ctx;
unsigned char md_tmp[EVP_MAX_MD_SIZE]; unsigned char md_tmp[EVP_MAX_MD_SIZE];
unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH]; unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
int i; int i, ivl, kl;
PBEPARAM *pbe; PBEPARAM *pbe;
int saltlen, iter; int saltlen, iter;
unsigned char *salt; unsigned char *salt;
@ -48,6 +48,17 @@ int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
return 0; return 0;
} }
ivl = EVP_CIPHER_iv_length(cipher);
if (ivl < 0 || ivl > 16) {
EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_INVALID_IV_LENGTH);
return 0;
}
kl = EVP_CIPHER_key_length(cipher);
if (kl < 0 || kl > (int)sizeof(md_tmp)) {
EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_INVALID_KEY_LENGTH);
return 0;
}
if (!pbe->iter) if (!pbe->iter)
iter = 1; iter = 1;
else else
@ -86,11 +97,8 @@ int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
if (!EVP_DigestFinal_ex(ctx, md_tmp, NULL)) if (!EVP_DigestFinal_ex(ctx, md_tmp, NULL))
goto err; goto err;
} }
OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp)); memcpy(key, md_tmp, kl);
memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher)); memcpy(iv, md_tmp + (16 - ivl), ivl);
OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16);
memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),
EVP_CIPHER_iv_length(cipher));
if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de)) if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
goto err; goto err;
OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE); OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);

1
include/openssl/evperr.h
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@ -191,6 +191,7 @@ int ERR_load_EVP_strings(void);
# define EVP_R_INVALID_CUSTOM_LENGTH 185 # define EVP_R_INVALID_CUSTOM_LENGTH 185
# define EVP_R_INVALID_DIGEST 152 # define EVP_R_INVALID_DIGEST 152
# define EVP_R_INVALID_FIPS_MODE 168 # define EVP_R_INVALID_FIPS_MODE 168
# define EVP_R_INVALID_IV_LENGTH 194
# define EVP_R_INVALID_KEY 163 # define EVP_R_INVALID_KEY 163
# define EVP_R_INVALID_KEY_LENGTH 130 # define EVP_R_INVALID_KEY_LENGTH 130
# define EVP_R_INVALID_OPERATION 148 # define EVP_R_INVALID_OPERATION 148