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-rw-r--r--crypto/asn1/ameth_lib.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/crypto/asn1/ameth_lib.c b/crypto/asn1/ameth_lib.c
index 5f523b2969..87a3eba14a 100644
--- a/crypto/asn1/ameth_lib.c
+++ b/crypto/asn1/ameth_lib.c
@@ -137,6 +137,11 @@ const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth)
{
+ if (pkey_asn1_find(ameth->pkey_id) != NULL) {
+ EVPerr(EVP_F_EVP_PKEY_ASN1_ADD0,
+ EVP_R_PKEY_ASN1_METHOD_ALREADY_REGISTERED);
+ return 0;
+ }
if (app_methods == NULL) {
app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp);
if (app_methods == NULL)