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Fix mem leak on error path

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The mem pointed to by cAB can be leaked on an error path.

Reviewed-by: Tim Hudson <tjh@openssl.org>
This commit is contained in:
Matt Caswell 2016-08-22 23:23:31 +01:00
parent 85d6b09dda
commit 4162c7d378
1 changed files with 4 additions and 2 deletions
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6
crypto/srp/srp_lib.c
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@ -168,7 +168,7 @@ BIGNUM *SRP_Calc_x(const BIGNUM *s, const char *user, const char *pass)
{
unsigned char dig[SHA_DIGEST_LENGTH];
EVP_MD_CTX *ctxt;
unsigned char *cs;
unsigned char *cs = NULL;
BIGNUM *res = NULL;
if ((s == NULL) || (user == NULL) || (pass == NULL))
@ -190,13 +190,15 @@ BIGNUM *SRP_Calc_x(const BIGNUM *s, const char *user, const char *pass)
BN_bn2bin(s, cs);
if (!EVP_DigestUpdate(ctxt, cs, BN_num_bytes(s)))
goto err;
OPENSSL_free(cs);
if (!EVP_DigestUpdate(ctxt, dig, sizeof(dig))
|| !EVP_DigestFinal_ex(ctxt, dig, NULL))
goto err;
res = BN_bin2bn(dig, sizeof(dig), NULL);
err:
OPENSSL_free(cs);
EVP_MD_CTX_free(ctxt);
return res;
}