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Don't leak memory on error in i2b_PVK

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The i2b_PVK function leaked a number of different memory allocations on
error paths (and even some non-error paths).

Reviewed-by: Richard Levitte <levitte@openssl.org>
This commit is contained in:
Matt Caswell 2016-04-27 14:00:37 +01:00
parent 204cf9406e
commit 8e588e2812
1 changed files with 14 additions and 8 deletions
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22
crypto/pem/pvkfmt.c
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@ -807,26 +807,29 @@ static int i2b_PVK(unsigned char **out, EVP_PKEY *pk, int enclevel,
{
int outlen = 24, pklen;
unsigned char *p, *salt = NULL;
EVP_CIPHER_CTX *cctx = EVP_CIPHER_CTX_new();
EVP_CIPHER_CTX *cctx = NULL;
if (enclevel)
outlen += PVK_SALTLEN;
pklen = do_i2b(NULL, pk, 0);
if (pklen < 0)
return -1;
outlen += pklen;
if (!out)
if (out == NULL)
return outlen;
if (*out)
if (*out != NULL) {
p = *out;
else {
} else {
p = OPENSSL_malloc(outlen);
if (p == NULL) {
PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE);
return -1;
}
*out = p;
}
cctx = EVP_CIPHER_CTX_new();
if (cctx == NULL)
return -1;
write_ledword(&p, MS_PVKMAGIC);
write_ledword(&p, 0);
if (EVP_PKEY_id(pk) == EVP_PKEY_DSA)
@ -843,9 +846,7 @@ static int i2b_PVK(unsigned char **out, EVP_PKEY *pk, int enclevel,
p += PVK_SALTLEN;
}
do_i2b(&p, pk, 0);
if (enclevel == 0)
return outlen;
else {
if (enclevel != 0) {
char psbuf[PEM_BUFSIZE];
unsigned char keybuf[20];
int enctmplen, inlen;
@ -871,7 +872,12 @@ static int i2b_PVK(unsigned char **out, EVP_PKEY *pk, int enclevel,
if (!EVP_DecryptFinal_ex(cctx, p + enctmplen, &enctmplen))
goto error;
}
EVP_CIPHER_CTX_free(cctx);
if (*out == NULL)
*out = p;
return outlen;
error: