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Check for cipher BIO errors and set key length after parameter decode.

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This commit is contained in:
Dr. Stephen Henson 2008-03-15 13:37:32 +00:00
parent fd47c36136
commit e540d1cd77
2 changed files with 21 additions and 13 deletions
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24
crypto/cms/cms_enc.c
View File

@ -115,18 +115,6 @@ BIO *cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo *ec)
if (enc)
calg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(ctx));
/* If necessary set key length */
if (ec->keylen != EVP_CIPHER_CTX_key_length(ctx))
{
if (EVP_CIPHER_CTX_set_key_length(ctx, ec->keylen) <= 0)
{
CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
CMS_R_INVALID_KEY_LENGTH);
goto err;
}
}
if (enc)
{
int ivlen;
@ -146,6 +134,18 @@ BIO *cms_EncryptedContent_init_bio(CMS_EncryptedContentInfo *ec)
goto err;
}
/* If necessary set key length */
if (ec->keylen != EVP_CIPHER_CTX_key_length(ctx))
{
if (EVP_CIPHER_CTX_set_key_length(ctx, ec->keylen) <= 0)
{
CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,
CMS_R_INVALID_KEY_LENGTH);
goto err;
}
}
if (EVP_CipherInit_ex(ctx, NULL, NULL, ec->key, piv, enc) <= 0)
{
CMSerr(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO,

10
crypto/cms/cms_smime.c
View File

@ -77,12 +77,20 @@ static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
else
tmpout = out;
/* Read all content through chain to determine content digests */
/* Read all content through chain to process digest, decrypt etc */
for (;;)
{
i=BIO_read(in,buf,sizeof(buf));
if (i <= 0)
{
if (BIO_method_type(in) == BIO_TYPE_CIPHER)
{
if (!BIO_get_cipher_status(in))
goto err;
}
break;
}
if (tmpout)
BIO_write(tmpout, buf, i);
}