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openssl/crypto/pem/pem_lib.c

Index: openssl/crypto/pem/pem_lib.c
===================================================================
--- openssl/crypto/pem/pem_lib.c	(revision 105093)
+++ openssl/crypto/pem/pem_lib.c	(working copy)
@@ -57,6 +57,7 @@
  */
 
 #include <stdio.h>
+#include <ctype.h>
 #include "cryptlib.h"
 #include <openssl/buffer.h>
 #include <openssl/objects.h>
@@ -65,9 +66,13 @@
 #include <openssl/x509.h>
 #include <openssl/pem.h>
 #include <openssl/pkcs12.h>
+#include "asn1_locl.h"
 #ifndef OPENSSL_NO_DES
 #include <openssl/des.h>
 #endif
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
 
 const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT;
 
@@ -75,6 +80,7 @@
 
 static int load_iv(char **fromp,unsigned char *to, int num);
 static int check_pem(const char *nm, const char *name);
+int pem_check_suffix(const char *pem_str, const char *suffix);
 
 int PEM_def_callback(char *buf, int num, int w, void *key)
 	{
@@ -99,7 +105,7 @@
 
 	for (;;)
 		{
-		i=EVP_read_pw_string(buf,num,prompt,w);
+		i=EVP_read_pw_string_min(buf,MIN_LENGTH,num,prompt,w);
 		if (i != 0)
 			{
 			PEMerr(PEM_F_PEM_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
@@ -183,20 +189,54 @@
 
 	/* Make PEM_STRING_EVP_PKEY match any private key */
 
-	if(!strcmp(nm,PEM_STRING_PKCS8) &&
-		!strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
+	if(!strcmp(name,PEM_STRING_EVP_PKEY))
+		{
+		int slen;
+		const EVP_PKEY_ASN1_METHOD *ameth;
+		if(!strcmp(nm,PEM_STRING_PKCS8))
+			return 1;
+		if(!strcmp(nm,PEM_STRING_PKCS8INF))
+			return 1;
+		slen = pem_check_suffix(nm, "PRIVATE KEY"); 
+		if (slen > 0)
+			{
+			/* NB: ENGINE implementations wont contain
+			 * a deprecated old private key decode function
+			 * so don't look for them.
+			 */
+			ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
+			if (ameth && ameth->old_priv_decode)
+				return 1;
+			}
+		return 0;
+		}
 
-	if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
-		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
+	if(!strcmp(name,PEM_STRING_PARAMETERS))
+		{
+		int slen;
+		const EVP_PKEY_ASN1_METHOD *ameth;
+		slen = pem_check_suffix(nm, "PARAMETERS"); 
+		if (slen > 0)
+			{
+			ENGINE *e;
+			ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
+			if (ameth)
+				{
+				int r;
+				if (ameth->param_decode)
+					r = 1;
+				else
+					r = 0;
+#ifndef OPENSSL_NO_ENGINE
+				if (e)
+					ENGINE_finish(e);
+#endif
+				return r;
+				}
+			}
+		return 0;
+		}
 
-	if(!strcmp(nm,PEM_STRING_RSA) &&
-		!strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
-
-	if(!strcmp(nm,PEM_STRING_DSA) &&
-		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
-
- 	if(!strcmp(nm,PEM_STRING_ECPRIVATEKEY) &&
- 		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
 	/* Permit older strings */
 
 	if(!strcmp(nm,PEM_STRING_X509_OLD) &&
@@ -219,6 +259,14 @@
 	if(!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
 		!strcmp(name, PEM_STRING_PKCS7)) return 1;
 
+#ifndef OPENSSL_NO_CMS
+	if(!strcmp(nm, PEM_STRING_X509) &&
+		!strcmp(name, PEM_STRING_CMS)) return 1;
+	/* Allow CMS to be read from PKCS#7 headers */
+	if(!strcmp(nm, PEM_STRING_PKCS7) &&
+		!strcmp(name, PEM_STRING_CMS)) return 1;
+#endif
+
 	return 0;
 }
 
@@ -264,7 +312,7 @@
 
 #ifndef OPENSSL_NO_FP_API
 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
-		   char *x, const EVP_CIPHER *enc, unsigned char *kstr,
+		   void *x, const EVP_CIPHER *enc, unsigned char *kstr,
 		   int klen, pem_password_cb *callback, void *u)
         {
         BIO *b;
@@ -283,7 +331,7 @@
 #endif
 
 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
-		       char *x, const EVP_CIPHER *enc, unsigned char *kstr,
+		       void *x, const EVP_CIPHER *enc, unsigned char *kstr,
 		       int klen, pem_password_cb *callback, void *u)
 	{
 	EVP_CIPHER_CTX ctx;
@@ -434,7 +482,6 @@
 
 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
 	{
-	int o;
 	const EVP_CIPHER *enc=NULL;
 	char *p,c;
 	char **header_pp = &header;
@@ -474,7 +521,6 @@
 		header++;
 		}
 	*header='\0';
-	o=OBJ_sn2nid(p);
 	cipher->cipher=enc=EVP_get_cipherbyname(p);
 	*header=c;
 	header++;
@@ -782,3 +828,25 @@
 	BUF_MEM_free(dataB);
 	return(0);
 	}
+
+/* Check pem string and return prefix length.
+ * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY"
+ * the return value is 3 for the string "RSA".
+ */
+
+int pem_check_suffix(const char *pem_str, const char *suffix)
+	{
+	int pem_len = strlen(pem_str);
+	int suffix_len = strlen(suffix);
+	const char *p;
+	if (suffix_len + 1 >= pem_len)
+		return 0;
+	p = pem_str + pem_len - suffix_len;
+	if (strcmp(p, suffix))
+		return 0;
+	p--;
+	if (*p != ' ')
+		return 0;
+	return p - pem_str;
+	}
+