Add ossl_is_partially_overlapping symbol

Partial fix for #12964

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14473)

4 files changed, 9 insertions, 9 deletions

diff --git a/crypto/evp/e_aes.c b/crypto/evp/e_aes.c
index d812b2ade8..05c1ee787c 100644
--- a/crypto/evp/e_aes.c
+++ b/crypto/evp/e_aes.c
@@ -3567,7 +3567,7 @@ static int aes_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
     /* If not padding input must be multiple of 8 */
     if (!pad && inlen & 0x7)
         return -1;
-    if (is_partially_overlapping(out, in, inlen)) {
+    if (ossl_is_partially_overlapping(out, in, inlen)) {
         ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
         return 0;
     }
@@ -3871,7 +3871,7 @@ static int aes_ocb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
             buf = octx->data_buf;
             buf_len = &(octx->data_buf_len);
 
-            if (is_partially_overlapping(out + *buf_len, in, len)) {
+            if (ossl_is_partially_overlapping(out + *buf_len, in, len)) {
                 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
                 return 0;
             }
diff --git a/crypto/evp/e_des3.c b/crypto/evp/e_des3.c
index 9d143d3bd5..f85d520eb6 100644
--- a/crypto/evp/e_des3.c
+++ b/crypto/evp/e_des3.c
@@ -397,7 +397,7 @@ static int des_ede3_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
     if (inl >= EVP_MAXCHUNK || inl % 8)
         return -1;
 
-    if (is_partially_overlapping(out, in, inl)) {
+    if (ossl_is_partially_overlapping(out, in, inl)) {
         ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
         return 0;
     }
diff --git a/crypto/evp/evp_enc.c b/crypto/evp/evp_enc.c
index eb174c2d9f..c3d2b97594 100644
--- a/crypto/evp/evp_enc.c
+++ b/crypto/evp/evp_enc.c
@@ -476,7 +476,7 @@ int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
 # define PTRDIFF_T size_t
 #endif
 
-int is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
+int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
 {
     PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
     /*
@@ -503,7 +503,7 @@ static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
 
     if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
         /* If block size > 1 then the cipher will have to do this check */
-        if (bl == 1 && is_partially_overlapping(out, in, cmpl)) {
+        if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
             ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
             return 0;
         }
@@ -520,7 +520,7 @@ static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
         *outl = 0;
         return inl == 0;
     }
-    if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
+    if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
         ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
         return 0;
     }
@@ -785,7 +785,7 @@ int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
         cmpl = (cmpl + 7) / 8;
 
     if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
-        if (b == 1 && is_partially_overlapping(out, in, cmpl)) {
+        if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
             ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
             return 0;
         }
@@ -812,7 +812,7 @@ int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
     if (ctx->final_used) {
         /* see comment about PTRDIFF_T comparison above */
         if (((PTRDIFF_T)out == (PTRDIFF_T)in)
-            || is_partially_overlapping(out, in, b)) {
+            || ossl_is_partially_overlapping(out, in, b)) {
             ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
             return 0;
         }
diff --git a/crypto/evp/evp_local.h b/crypto/evp/evp_local.h
index 92a96f433e..0db84a3d84 100644
--- a/crypto/evp/evp_local.h
+++ b/crypto/evp/evp_local.h
@@ -227,7 +227,7 @@ struct evp_Encode_Ctx_st {
 typedef struct evp_pbe_st EVP_PBE_CTL;
 DEFINE_STACK_OF(EVP_PBE_CTL)
 
-int is_partially_overlapping(const void *ptr1, const void *ptr2, int len);
+int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len);
 
 #include <openssl/types.h>
 #include <openssl/core.h>